/* roulang page: index */
:root {
            --color-primary: #161C27;
            --color-secondary: #00C9A7;
            --color-accent: #FF6B35;
            --color-decor: #7B2CBF;
            --color-bg: #F5F7FA;
            --color-card: #FFFFFF;
            --color-text: #1F2733;
            --color-text-second: #4A5568;
            --color-text-muted: #6B7686;
            --color-border: #E4E7EC;
            --color-footer-text: #9AA4B2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color var(--transition-base), border-color var(--transition-base), opacity var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--color-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-padding-sm {
            padding-top: 56px;
            padding-bottom: 56px;
        }

        .section-bg-light {
            background-color: var(--color-bg);
        }

        .section-bg-white {
            background-color: #ffffff;
        }

        .section-bg-dark {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .section-divider {
            border-top: 1px solid var(--color-border);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-secondary);
            margin-bottom: 14px;
            border-left: 3px solid var(--color-accent);
            padding-left: 10px;
            line-height: 1.4;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-title.light {
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 8px;
        }

        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            margin-bottom: 44px;
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-secondary {
            color: var(--color-secondary);
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .mt-0 { margin-top: 0; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mt-4 { margin-top: 32px; }
        .mt-5 { margin-top: 48px; }
        .mb-0 { margin-bottom: 0; }
        .mb-1 { margin-bottom: 8px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-3 { margin-bottom: 24px; }
        .mb-4 { margin-bottom: 32px; }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: #E5592A;
            border-color: #E5592A;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
        }

        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.4);
        }

        .btn-outline-light:hover {
            border-color: #ffffff;
            color: #ffffff;
            background-color: rgba(255, 255, 255, 0.08);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }
        .btn-lg {
            padding: 15px 36px;
            font-size: 16px;
            border-radius: 10px;
        }

        .btn .fa,
        .btn .fas,
        .btn .far {
            font-size: 0.9em;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--color-primary);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
            height: 64px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            text-decoration: none;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .brand-logo:hover,
        .brand-logo:focus {
            color: var(--color-secondary);
        }

        .brand-logo .logo-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-secondary), #00A88D);
            color: #ffffff;
            font-size: 16px;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding-bottom: 4px;
            position: relative;
            text-decoration: none;
            transition: color var(--transition-base);
            white-space: nowrap;
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transition: width var(--transition-base);
            border-radius: 2px;
        }

        .main-nav a:hover,
        .main-nav a:focus {
            color: #ffffff;
        }

        .main-nav a:hover::after,
        .main-nav a:focus::after {
            width: 100%;
        }

        .main-nav a.active {
            color: var(--color-secondary);
        }

        .main-nav a.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #ffffff;
            font-size: 22px;
            cursor: pointer;
            padding: 6px;
            border-radius: 6px;
            transition: background-color var(--transition-base);
        }

        .nav-toggle:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        /* Hero Section */
        .hero-section {
            position: relative;
            background-color: var(--color-primary);
            padding: 64px 0 48px;
            overflow: hidden;
            min-height: 440px;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 75% 50%, rgba(0, 201, 167, 0.18) 0%, transparent 55%),
                        radial-gradient(ellipse at 30% 80%, rgba(123, 44, 191, 0.12) 0%, transparent 50%);
            pointer-events: none;
            z-index: 1;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 20px;
            letter-spacing: 0;
        }

        .hero-content h1 .highlight {
            color: var(--color-secondary);
        }

        .hero-content h1 .highlight-accent {
            color: var(--color-accent);
        }

        .hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.85;
            margin-bottom: 24px;
            max-width: 600px;
        }

        .hero-region-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 28px;
        }

        .region-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background-color: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.18);
            transition: all var(--transition-base);
            cursor: default;
            white-space: nowrap;
        }

        .region-tag:hover {
            background-color: rgba(0, 201, 167, 0.18);
            border-color: rgba(0, 201, 167, 0.5);
            color: #ffffff;
        }

        .region-tag .fa {
            font-size: 11px;
            color: var(--color-secondary);
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
            background-color: #0d1117;
        }

        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .hero-visual:hover img {
            transform: scale(1.03);
        }

        .hero-visual-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0) 100%);
            color: #ffffff;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .hero-visual-overlay .match-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-secondary);
            background-color: rgba(0, 201, 167, 0.18);
            border: 1px solid rgba(0, 201, 167, 0.4);
            border-radius: 999px;
            padding: 4px 12px;
            width: fit-content;
        }

        .hero-visual-overlay .match-title {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.4;
        }

        .hero-visual-overlay .match-time {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.75);
        }

        /* Pill Navigation */
        .pill-nav {
            background-color: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            padding: 12px 0;
            position: relative;
            z-index: 50;
        }

        .pill-nav .container {
            display: flex;
            gap: 10px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding-bottom: 2px;
        }

        .pill-nav .container::-webkit-scrollbar {
            display: none;
        }

        .pill-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-second);
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            white-space: nowrap;
            transition: all var(--transition-base);
            text-decoration: none;
            flex-shrink: 0;
            cursor: pointer;
        }

        .pill-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .pill-chip.active {
            background-color: var(--color-secondary);
            color: #ffffff;
            border-color: var(--color-secondary);
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .pill-chip .fa {
            font-size: 12px;
        }

        /* Pain Point Section */
        .pain-section {
            background-color: #ffffff;
        }

        .pain-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 36px;
        }

        .pain-card {
            background-color: var(--color-bg);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }

        .pain-card:hover {
            border-color: var(--color-decor);
            box-shadow: var(--shadow-sm);
        }

        .pain-card .pain-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background-color: rgba(255, 107, 53, 0.12);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .pain-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .pain-card p {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Solution Section */
        .solution-section {
            background-color: var(--color-bg);
        }

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 36px;
        }

        .solution-card {
            background-color: #ffffff;
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }

        .solution-card:nth-child(2) {
            background-color: #f9fafb;
        }

        .solution-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-3px);
        }

        .solution-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: linear-gradient(135deg, rgba(0, 201, 167, 0.15), rgba(0, 168, 141, 0.08));
            color: var(--color-secondary);
        }

        .solution-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .solution-card p {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Steps Section */
        .steps-section {
            background-color: #ffffff;
        }

        .steps-timeline {
            position: relative;
            margin-top: 40px;
            padding-left: 28px;
        }

        .steps-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--color-secondary), var(--color-decor), var(--color-accent));
            border-radius: 2px;
        }

        .step-item {
            position: relative;
            padding-left: 36px;
            padding-bottom: 40px;
            transition: all var(--transition-base);
        }

        .step-item:last-child {
            padding-bottom: 0;
        }

        .step-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: #ffffff;
            border: 3px solid var(--color-secondary);
            z-index: 1;
        }

        .step-item:nth-child(3)::before {
            border-color: var(--color-decor);
        }

        .step-item:nth-child(4)::before {
            border-color: var(--color-accent);
        }

        .step-number {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 700;
            color: var(--color-secondary);
            background-color: rgba(0, 201, 167, 0.1);
            border-radius: 6px;
            padding: 3px 10px;
            margin-bottom: 8px;
            letter-spacing: 0.04em;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 520px;
        }

        /* Metrics Section */
        .metrics-section {
            background-color: var(--color-primary);
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .metrics-section::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 201, 167, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 2;
        }

        .metric-card {
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .metric-card:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-color: rgba(0, 201, 167, 0.4);
            transform: translateY(-3px);
        }

        .metric-value {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }

        .metric-card:nth-child(3) .metric-value {
            color: var(--color-accent);
        }

        .metric-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.5;
        }

        /* Testimonials Section */
        .testimonial-section {
            background-color: var(--color-bg);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 36px;
        }

        .testimonial-card {
            background-color: #ffffff;
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }

        .testimonial-quote {
            font-size: 15px;
            color: var(--color-text);
            line-height: 1.75;
            margin-bottom: 16px;
            position: relative;
            padding-left: 16px;
            border-left: 3px solid var(--color-secondary);
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-decor));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            flex-shrink: 0;
        }

        .testimonial-info {
            flex: 1;
        }

        .testimonial-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text);
        }

        .testimonial-role {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        .testimonial-stars {
            color: #FFB800;
            font-size: 13px;
            letter-spacing: 2px;
        }

        /* Brand Intro Section */
        .brand-intro-section {
            background-color: #ffffff;
        }

        .brand-intro-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .brand-intro-text p {
            font-size: 15px;
            color: var(--color-text-second);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .brand-intro-text p:last-child {
            margin-bottom: 0;
        }

        .brand-intro-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            aspect-ratio: 4 / 3;
        }

        .brand-intro-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .brand-intro-visual:hover img {
            transform: scale(1.04);
        }

        /* Audience Section */
        .audience-section {
            background-color: var(--color-bg);
        }

        .audience-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }

        .audience-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            background-color: #ffffff;
            color: var(--color-text);
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            cursor: default;
        }

        .audience-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }

        .audience-chip .fa {
            font-size: 14px;
            color: var(--color-secondary);
        }

        /* News Section */
        .news-section {
            background-color: #ffffff;
        }

        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 32px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            background-color: #ffffff;
            transition: all var(--transition-base);
        }

        .news-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
        }

        .news-thumb {
            width: 120px;
            height: 90px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
            min-width: 0;
        }

        .news-date {
            font-size: 12px;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        .news-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.45;
            margin-bottom: 2px;
        }

        .news-excerpt {
            font-size: 13px;
            color: var(--color-text-second);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-secondary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
            transition: color var(--transition-base);
        }

        .news-more:hover {
            color: var(--color-accent);
        }

        .news-more .fa {
            font-size: 11px;
        }

        /* Data Bars Section */
        .data-bars-section {
            background-color: var(--color-bg);
        }

        .data-bars-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
            margin-top: 36px;
        }

        .data-bar-item {
            background-color: #ffffff;
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }

        .data-bar-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--color-secondary);
        }

        .data-bar-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 14px;
        }

        .data-bar-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
        }

        .data-bar-value {
            font-family: var(--font-mono);
            font-size: 20px;
            font-weight: 700;
            color: var(--color-secondary);
        }

        .data-bar-track {
            width: 100%;
            height: 8px;
            background-color: var(--color-bg);
            border-radius: 999px;
            overflow: hidden;
        }

        .data-bar-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--color-secondary), #00E0B8);
            transition: width 1s ease;
            position: relative;
        }

        .data-bar-fill.orange {
            background: linear-gradient(90deg, var(--color-accent), #FF9E6B);
        }

        .data-bar-fill.purple {
            background: linear-gradient(90deg, var(--color-decor), #B54CE8);
        }

        .data-bar-track-label {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: 8px;
            text-align: right;
        }

        /* FAQ Section */
        .faq-section {
            background-color: #ffffff;
        }

        .faq-accordion {
            margin-top: 32px;
            max-width: 800px;
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-base);
            background-color: #ffffff;
        }

        .faq-accordion .accordion-item.is-active {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        .faq-accordion .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            background-color: #ffffff;
            border: none;
            cursor: pointer;
            text-align: left;
            width: 100%;
            transition: all var(--transition-base);
        }

        .faq-accordion .accordion-title:hover {
            color: var(--color-secondary);
            background-color: rgba(0, 201, 167, 0.03);
        }

        .faq-accordion .accordion-title .fa {
            transition: transform var(--transition-base);
            font-size: 14px;
            color: var(--color-text-muted);
        }

        .faq-accordion .accordion-item.is-active .accordion-title .fa {
            transform: rotate(180deg);
            color: var(--color-secondary);
        }

        .faq-accordion .accordion-content {
            padding: 0 20px 18px 20px;
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.75;
            border-left: 3px solid var(--color-secondary);
            margin-left: 20px;
            padding-left: 16px;
        }

        /* CTA Section */
        .cta-section {
            background-color: var(--color-primary);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 50%, rgba(0, 201, 167, 0.2) 0%, transparent 55%),
                        radial-gradient(ellipse at 20% 80%, rgba(255, 107, 53, 0.1) 0%, transparent 45%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 28px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.75;
            margin-bottom: 32px;
        }

        .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 56px 0 28px;
            color: var(--color-footer-text);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--color-footer-text);
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #ffffff;
        }

        .footer-subscribe p {
            font-size: 13px;
            color: var(--color-footer-text);
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .footer-subscribe-form {
            display: flex;
            gap: 8px;
        }

        .footer-subscribe-form input {
            flex: 1;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background-color: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            font-size: 13px;
            transition: all var(--transition-base);
            min-width: 0;
        }

        .footer-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-subscribe-form input:focus {
            border-color: var(--color-secondary);
            outline: 2px solid rgba(0, 201, 167, 0.3);
            outline-offset: 0;
            background-color: rgba(255, 255, 255, 0.08);
        }

        .footer-subscribe-form .btn-primary {
            padding: 10px 18px;
            font-size: 13px;
            white-space: nowrap;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--color-footer-text);
        }

        .footer-bottom-links {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            font-size: 13px;
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-bottom-links a:hover {
            color: #ffffff;
        }

        .footer-bottom .sep {
            color: rgba(255, 255, 255, 0.3);
        }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .solution-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .brand-intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .brand-intro-visual {
                order: -1;
                max-width: 400px;
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .data-bars-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media screen and (max-width: 768px) {
            .site-header {
                height: 56px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 56px;
                left: 0;
                right: 0;
                background-color: var(--color-primary);
                flex-direction: column;
                padding: 16px 20px;
                gap: 0;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
                z-index: 99;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                font-size: 15px;
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .main-nav a::after {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .hero-section {
                padding: 40px 0 32px;
                min-height: auto;
            }
            .hero-content h1 {
                font-size: 24px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }
            .hero-cta-group .btn {
                width: 100%;
            }
            .pill-nav .container {
                gap: 8px;
            }
            .pill-chip {
                font-size: 12px;
                padding: 6px 12px;
            }
            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .section-padding-sm {
                padding-top: 36px;
                padding-bottom: 36px;
            }
            .section-title {
                font-size: 22px;
            }
            .pain-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .solution-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .metric-value {
                font-size: 30px;
            }
            .metric-card {
                padding: 20px 14px;
            }
            .steps-timeline {
                padding-left: 16px;
            }
            .step-item {
                padding-left: 28px;
                padding-bottom: 28px;
            }
            .step-item::before {
                left: -18px;
                width: 12px;
                height: 12px;
            }
            .audience-chips {
                gap: 8px;
            }
            .audience-chip {
                font-size: 13px;
                padding: 8px 15px;
            }
            .news-item {
                flex-direction: column;
                gap: 12px;
                padding: 16px;
            }
            .news-thumb {
                width: 100%;
                height: 160px;
            }
            .news-title {
                font-size: 15px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .cta-content h2 {
                font-size: 22px;
            }
            .cta-btn-group {
                flex-direction: column;
                gap: 10px;
            }
            .cta-btn-group .btn {
                width: 100%;
            }
        }

        @media screen and (max-width: 520px) {
            .hero-section {
                padding: 28px 0 24px;
            }
            .hero-content h1 {
                font-size: 22px;
            }
            .region-tag {
                font-size: 11px;
                padding: 5px 10px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .metric-value {
                font-size: 28px;
            }
            .data-bar-name {
                font-size: 13px;
            }
            .data-bar-value {
                font-size: 17px;
            }
            .faq-accordion .accordion-title {
                font-size: 14px;
                padding: 15px 16px;
            }
            .faq-accordion .accordion-content {
                font-size: 13px;
                margin-left: 16px;
                padding-left: 12px;
            }
            .section-title {
                font-size: 20px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #161C27;
            --color-secondary: #00C9A7;
            --color-accent: #FF6B35;
            --color-decor: #7B2CBF;
            --color-bg: #F5F7FA;
            --color-card: #FFFFFF;
            --color-text: #1F2733;
            --color-text-second: #4A5568;
            --color-text-muted: #6B7686;
            --color-border: #E4E7EC;
            --color-footer-text: #9AA4B2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color var(--transition-base), border-color var(--transition-base), opacity var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--color-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        .section-padding-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .section-bg-light {
            background-color: var(--color-bg);
        }

        .section-bg-white {
            background-color: #ffffff;
        }

        .section-bg-dark {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .section-divider {
            border-top: 1px solid var(--color-border);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-secondary);
            margin-bottom: 14px;
            border-left: 3px solid var(--color-accent);
            padding-left: 10px;
            line-height: 1.4;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-title.light {
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 8px;
        }

        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            margin-bottom: 40px;
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-secondary {
            color: var(--color-secondary);
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: #E5592A;
            border-color: #E5592A;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
        }

        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 6px;
        }

        .btn-link {
            background: none;
            border: none;
            padding: 0;
            color: var(--color-secondary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-link:hover {
            color: var(--color-accent);
            border-bottom-color: var(--color-accent);
        }

        /* Header */
        .site-header {
            background-color: var(--color-primary);
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            text-decoration: none;
            letter-spacing: 0;
            transition: opacity var(--transition-base);
        }

        .brand-logo:hover {
            color: #ffffff;
            opacity: 0.85;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-secondary) 0%, #00A88C 100%);
            color: #ffffff;
            font-size: 16px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-base);
            position: relative;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--color-secondary);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .main-nav a.active {
            color: #ffffff;
            background-color: rgba(255, 255, 255, 0.08);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-secondary);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-sm);
            color: #ffffff;
            font-size: 20px;
            width: 42px;
            height: 42px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-base);
        }

        .nav-toggle:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            background-color: rgba(255, 255, 255, 0.06);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: #ffffff;
            border-bottom: 1px solid var(--color-border);
            padding: 12px 0;
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .breadcrumb-bar a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .breadcrumb-bar a:hover {
            color: var(--color-secondary);
        }

        .breadcrumb-sep {
            margin: 0 8px;
            color: var(--color-border);
        }

        .breadcrumb-current {
            color: var(--color-text-second);
            font-weight: 500;
        }

        /* Category Hero Compact */
        .category-hero {
            background-color: #ffffff;
            padding: 48px 0 40px;
            border-bottom: 1px solid var(--color-border);
        }

        .category-hero .hero-inner {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: center;
        }

        .category-hero h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--color-text-second);
            line-height: 1.8;
            max-width: 600px;
        }

        .category-hero .hero-stat-card {
            background-color: var(--color-bg);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            border: 1px solid var(--color-border);
        }

        .category-hero .hero-stat-card .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--color-secondary);
            font-family: var(--font-mono);
            letter-spacing: -0.02em;
        }

        .category-hero .hero-stat-card .stat-label {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

        .hero-cover-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            aspect-ratio: 4/3;
        }

        .hero-cover-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Article Grid */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background-color: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all var(--transition-base);
        }

        .article-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-3px);
        }

        .article-card .card-cover {
            aspect-ratio: 4/3;
            overflow: hidden;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }

        .article-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .article-card:hover .card-cover img {
            transform: scale(1.03);
        }

        .article-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card .card-date {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .card-excerpt {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .card-link {
            margin-top: auto;
        }

        .article-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
        }

        .article-card .card-tag {
            font-size: 12px;
            color: var(--color-secondary);
            background-color: rgba(0, 201, 167, 0.08);
            padding: 3px 10px;
            border-radius: 999px;
            font-weight: 500;
        }

        /* Hot Content */
        .hot-scroll {
            display: flex;
            gap: 14px;
            overflow-x: auto;
            padding-bottom: 8px;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .hot-scroll::-webkit-scrollbar {
            display: none;
        }

        .hot-chip {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: 10px 18px;
            font-size: 14px;
            color: var(--color-text-second);
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .hot-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        .hot-chip .chip-rank {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--color-secondary);
            color: #ffffff;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .hot-chip .chip-rank.alt {
            background-color: var(--color-accent);
        }

        /* Data Snapshot */
        .snapshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .snapshot-card {
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .snapshot-card:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--color-secondary);
        }

        .snapshot-card .snapshot-icon {
            font-size: 24px;
            color: var(--color-secondary);
            margin-bottom: 10px;
        }

        .snapshot-card .snapshot-number {
            font-size: 32px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .snapshot-card .snapshot-number.highlight {
            color: var(--color-secondary);
        }

        .snapshot-card .snapshot-label {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 6px;
        }

        /* Topic Block */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .topic-card:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }

        .topic-card .topic-cover {
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .topic-card .topic-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .topic-card:hover .topic-cover img {
            transform: scale(1.04);
        }

        .topic-card .topic-body {
            padding: 16px 18px;
        }

        .topic-card .topic-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .topic-card .topic-count {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* Subscribe CTA */
        .subscribe-cta {
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .subscribe-cta .sub-left {
            flex: 1;
            min-width: 280px;
        }

        .subscribe-cta .sub-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .subscribe-cta .sub-desc {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
        }

        .subscribe-cta .sub-form {
            display: flex;
            gap: 10px;
            flex-shrink: 0;
        }

        .subscribe-cta .sub-form input {
            min-width: 240px;
            padding: 10px 16px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            background-color: #ffffff;
            color: var(--color-text);
            transition: all var(--transition-base);
        }

        .subscribe-cta .sub-form input:focus {
            border-color: var(--color-secondary);
            outline: 2px solid rgba(0, 201, 167, 0.2);
            outline-offset: 0;
        }

        /* See More */
        .see-more-wrap {
            text-align: center;
            margin-top: 32px;
        }

        .see-more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            text-decoration: none;
            padding: 10px 24px;
            border: 1px solid var(--color-border);
            border-radius: 999px;
            transition: all var(--transition-base);
            background-color: #ffffff;
        }

        .see-more-link:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding: 56px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #ffffff;
            text-decoration: none;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--color-footer-text);
            line-height: 1.8;
            max-width: 320px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            color: var(--color-footer-text);
            font-size: 13px;
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-col ul a:hover {
            color: #ffffff;
        }

        .footer-subscribe p {
            font-size: 13px;
            color: var(--color-footer-text);
            margin-bottom: 14px;
            line-height: 1.7;
        }

        .footer-subscribe-form {
            display: flex;
            gap: 8px;
        }

        .footer-subscribe-form input {
            flex: 1;
            min-width: 0;
            padding: 9px 14px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            background-color: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            font-size: 13px;
            transition: all var(--transition-base);
        }

        .footer-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-subscribe-form input:focus {
            border-color: var(--color-secondary);
            outline: 2px solid rgba(0, 201, 167, 0.3);
            outline-offset: 0;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 20px;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--color-footer-text);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-bottom-links a:hover {
            color: #ffffff;
        }

        .footer-bottom-links .sep {
            color: rgba(255, 255, 255, 0.25);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .category-hero .hero-inner {
                grid-template-columns: 1fr 260px;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 60px;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background-color: var(--color-primary);
                flex-direction: column;
                padding: 12px 20px 16px;
                gap: 2px;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
                border-top: 1px solid rgba(255, 255, 255, 0.08);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a {
                padding: 12px 14px;
                font-size: 15px;
                width: 100%;
            }

            .main-nav a.active::after {
                display: none;
            }

            .main-nav a.active {
                background-color: rgba(255, 255, 255, 0.1);
            }

            .category-hero {
                padding: 32px 0 28px;
            }

            .category-hero .hero-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .category-hero h1 {
                font-size: 24px;
            }

            .category-hero .hero-stat-card {
                display: none;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

            .snapshot-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .subscribe-cta {
                padding: 24px 20px;
                flex-direction: column;
                align-items: stretch;
            }

            .subscribe-cta .sub-form {
                flex-direction: column;
            }

            .subscribe-cta .sub-form input {
                min-width: 0;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .section-title {
                font-size: 22px;
            }

            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }
        }

        @media (max-width: 520px) {
            .snapshot-grid {
                grid-template-columns: 1fr;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .category-hero h1 {
                font-size: 20px;
            }

            .category-hero .hero-desc {
                font-size: 14px;
            }

            .article-card .card-title {
                font-size: 15px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #161C27;
            --color-secondary: #00C9A7;
            --color-accent: #FF6B35;
            --color-decor: #7B2CBF;
            --color-bg: #F5F7FA;
            --color-card: #FFFFFF;
            --color-text: #1F2733;
            --color-text-second: #4A5568;
            --color-text-muted: #6B7686;
            --color-border: #E4E7EC;
            --color-footer-text: #9AA4B2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color var(--transition-base), border-color var(--transition-base), opacity var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--color-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-padding-sm {
            padding-top: 56px;
            padding-bottom: 56px;
        }

        .section-bg-light {
            background-color: var(--color-bg);
        }

        .section-bg-white {
            background-color: #ffffff;
        }

        .section-bg-dark {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .section-divider {
            border-top: 1px solid var(--color-border);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-secondary);
            margin-bottom: 14px;
            border-left: 3px solid var(--color-accent);
            padding-left: 10px;
            line-height: 1.4;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-title.light {
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 8px;
        }

        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            margin-bottom: 44px;
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-secondary {
            color: var(--color-secondary);
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: #E5592A;
            border-color: #E5592A;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
        }

        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.35);
        }

        .btn-outline-light:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--color-primary);
            height: 64px;
            box-shadow: 0 1px 12px rgba(0, 0, 0, 0.14);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--color-secondary);
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
            color: #ffffff;
            font-size: 15px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 26px;
        }

        .main-nav a {
            position: relative;
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 20px 0;
            transition: color var(--transition-base);
        }

        .main-nav a:hover,
        .main-nav a:focus {
            color: var(--color-secondary);
        }

        .main-nav a.active {
            color: #ffffff;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 10px;
            width: 100%;
            height: 2px;
            background-color: var(--color-secondary);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #ffffff;
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: background var(--transition-base);
        }

        .nav-toggle:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .breadcrumb-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 12px;
        }

        .breadcrumb-row a {
            color: var(--color-secondary);
            font-weight: 500;
        }

        .breadcrumb-row a:hover {
            color: var(--color-accent);
        }

        .breadcrumb-sep {
            color: var(--color-border);
            font-size: 12px;
        }

        .category-hero {
            padding-top: 48px;
            padding-bottom: 48px;
            background-color: #ffffff;
            border-bottom: 1px solid var(--color-border);
        }

        .category-hero-grid {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 40px;
            align-items: center;
        }

        .category-hero-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
        }

        .category-hero-desc {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.8;
            max-width: 620px;
        }

        .category-hero-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
            background-color: var(--color-bg);
        }

        .category-hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .article-card {
            background-color: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
        }

        .article-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-4px);
        }

        .article-card-thumb {
            aspect-ratio: 4/3;
            overflow: hidden;
            background-color: var(--color-bg);
        }

        .article-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .article-card:hover .article-card-thumb img {
            transform: scale(1.03);
        }

        .article-card-body {
            padding: 22px 22px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card-date {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--color-text);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-excerpt {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }

        .article-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition-base);
        }

        .article-card-link:hover {
            color: var(--color-accent);
        }

        .load-more-row {
            text-align: center;
            margin-top: 40px;
        }

        .hot-content-scroll {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding-bottom: 12px;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }

        .hot-content-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .hot-content-scroll::-webkit-scrollbar-track {
            background: transparent;
        }

        .hot-content-scroll::-webkit-scrollbar-thumb {
            background-color: var(--color-border);
            border-radius: 999px;
        }

        .hot-chip {
            flex: 0 0 auto;
            padding: 10px 18px;
            border-radius: 999px;
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-second);
            white-space: nowrap;
            cursor: pointer;
            transition: all var(--transition-base);
        }

        .hot-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        .snapshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .snapshot-card {
            background-color: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            text-align: center;
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }

        .snapshot-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .snapshot-number {
            font-size: 42px;
            font-weight: 800;
            font-family: var(--font-mono);
            color: var(--color-secondary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .snapshot-label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        .topic-mini-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .topic-mini-card {
            background-color: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .topic-mini-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
        }

        .topic-mini-thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--color-bg);
        }

        .topic-mini-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .topic-mini-card:hover .topic-mini-thumb img {
            transform: scale(1.04);
        }

        .topic-mini-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .topic-mini-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .topic-mini-desc {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
        }

        .topic-mini-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .topic-mini-link:hover {
            color: var(--color-accent);
        }

        .subscribe-cta {
            background: linear-gradient(135deg, #eef7f5 0%, #fef4ef 50%, #f5f7fa 100%);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            padding: 48px 44px;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: center;
        }

        .subscribe-cta-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .subscribe-cta-desc {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .subscribe-form input[type="email"] {
            min-width: 280px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            font-size: 14px;
            color: var(--color-text);
            background-color: #ffffff;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .subscribe-form input[type="email"]:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 2px rgba(0, 201, 167, 0.18);
            outline: none;
        }

        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding-top: 64px;
            padding-bottom: 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-logo {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.75;
            margin-bottom: 0;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--color-footer-text);
            font-size: 14px;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #ffffff;
        }

        .footer-subscribe p {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .footer-subscribe-form {
            display: flex;
            gap: 8px;
        }

        .footer-subscribe-form input[type="email"] {
            flex: 1;
            min-width: 0;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.16);
            background-color: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            font-size: 13px;
            transition: border-color var(--transition-base), background var(--transition-base);
        }

        .footer-subscribe-form input[type="email"]::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-subscribe-form input[type="email"]:focus {
            border-color: var(--color-secondary);
            background-color: rgba(255, 255, 255, 0.1);
            outline: none;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 13px;
            color: var(--color-footer-text);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-bottom-links a {
            color: var(--color-footer-text);
            font-size: 13px;
            transition: color var(--transition-base);
        }

        .footer-bottom-links a:hover {
            color: #ffffff;
        }

        .footer-bottom-links .sep {
            color: rgba(255, 255, 255, 0.2);
        }

        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .topic-mini-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .snapshot-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

            .category-hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .category-hero-title {
                font-size: 30px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .main-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 20px;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
                display: none;
                border-top: 1px solid var(--color-border);
            }

            .main-nav.is-open {
                display: flex;
            }

            .main-nav a {
                color: var(--color-text);
                padding: 14px 0;
                font-size: 15px;
                border-bottom: 1px solid var(--color-border);
            }

            .main-nav a:last-child {
                border-bottom: none;
            }

            .main-nav a.active {
                color: var(--color-secondary);
            }

            .main-nav a.active::after {
                display: none;
            }

            .section-padding {
                padding-top: 56px;
                padding-bottom: 56px;
            }

            .section-padding-sm {
                padding-top: 40px;
                padding-bottom: 40px;
            }

            .section-title {
                font-size: 24px;
            }

            .category-hero {
                padding-top: 32px;
                padding-bottom: 32px;
            }

            .category-hero-title {
                font-size: 26px;
            }

            .article-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .topic-mini-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .snapshot-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .subscribe-cta {
                grid-template-columns: 1fr;
                padding: 32px 24px;
                gap: 20px;
            }

            .subscribe-form {
                flex-direction: column;
                align-items: stretch;
            }

            .subscribe-form input[type="email"] {
                min-width: 0;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
        }

        @media (max-width: 520px) {
            .category-hero-title {
                font-size: 22px;
            }

            .section-title {
                font-size: 21px;
            }

            .article-card-body {
                padding: 16px 16px 14px;
            }

            .article-card-title {
                font-size: 16px;
            }

            .snapshot-number {
                font-size: 32px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #161C27;
            --color-secondary: #00C9A7;
            --color-accent: #FF6B35;
            --color-decor: #7B2CBF;
            --color-bg: #F5F7FA;
            --color-card: #FFFFFF;
            --color-text: #1F2733;
            --color-text-second: #4A5568;
            --color-text-muted: #6B7686;
            --color-border: #E4E7EC;
            --color-footer-text: #9AA4B2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color var(--transition-base), border-color var(--transition-base), opacity var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--color-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-padding-sm {
            padding-top: 56px;
            padding-bottom: 56px;
        }

        .section-bg-light {
            background-color: var(--color-bg);
        }

        .section-bg-white {
            background-color: #ffffff;
        }

        .section-bg-dark {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .section-divider {
            border-top: 1px solid var(--color-border);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-secondary);
            margin-bottom: 14px;
            border-left: 3px solid var(--color-accent);
            padding-left: 10px;
            line-height: 1.4;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-title.light {
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 8px;
        }

        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            margin-bottom: 44px;
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-secondary {
            color: var(--color-secondary);
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: #E5592A;
            border-color: #E5592A;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
        }

        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.35);
        }

        .btn-outline-light:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 6px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--color-primary);
            height: 64px;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0;
            text-decoration: none;
            transition: opacity var(--transition-base);
        }

        .brand-logo:hover {
            color: #ffffff;
            opacity: 0.88;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
            border-radius: 8px;
            color: #ffffff;
            font-size: 16px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 6px;
            position: relative;
            transition: color var(--transition-base), background-color var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }

        .main-nav a:hover {
            color: var(--color-secondary);
            background-color: rgba(255, 255, 255, 0.06);
        }

        .main-nav a.active {
            color: #ffffff;
            font-weight: 600;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--color-secondary);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #ffffff;
            font-size: 22px;
            cursor: pointer;
            padding: 6px;
            border-radius: 6px;
            transition: background-color var(--transition-base);
        }

        .nav-toggle:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-second);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .breadcrumb a:hover {
            color: var(--color-secondary);
        }

        .breadcrumb .sep {
            color: var(--color-border);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--color-text-second);
            font-weight: 500;
        }

        /* Category Hero */
        .category-hero {
            background-color: #ffffff;
            border-bottom: 1px solid var(--color-border);
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .category-hero-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: center;
        }

        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 16px 0;
            line-height: 1.3;
            letter-spacing: 0;
        }

        .category-hero-desc {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.8;
            margin: 0;
        }

        .category-hero-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            aspect-ratio: 4/3;
            background-color: var(--color-bg);
        }

        .category-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Cards Grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background-color: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }

        .case-card-image {
            aspect-ratio: 4/3;
            overflow: hidden;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            background-color: var(--color-bg);
            position: relative;
        }

        .case-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s var(--transition-smooth);
        }

        .case-card:hover .case-card-image img {
            transform: scale(1.03);
        }

        .case-card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .case-card-date {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .case-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 10px 0;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .case-card-summary {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.75;
            margin: 0 0 16px 0;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .case-card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-secondary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition-base), gap var(--transition-base);
            border-bottom: 1px solid transparent;
            padding-bottom: 2px;
            align-self: flex-start;
        }

        .case-card-link:hover {
            color: var(--color-accent);
            gap: 10px;
            border-bottom-color: var(--color-accent);
        }

        /* Load more link */
        .load-more-wrap {
            text-align: center;
            margin-top: 36px;
        }

        .load-more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-secondary);
            text-decoration: none;
            padding: 10px 24px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            background-color: #ffffff;
        }

        .load-more-link:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        /* Hot topics */
        .hot-topics-scroll {
            display: flex;
            gap: 14px;
            overflow-x: auto;
            padding-bottom: 8px;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
            -webkit-overflow-scrolling: touch;
        }

        .hot-topics-scroll::-webkit-scrollbar {
            height: 4px;
        }

        .hot-topics-scroll::-webkit-scrollbar-track {
            background: transparent;
        }

        .hot-topics-scroll::-webkit-scrollbar-thumb {
            background-color: var(--color-border);
            border-radius: 4px;
        }

        .hot-topic-chip {
            flex: 0 0 auto;
            padding: 10px 20px;
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-second);
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
            text-decoration: none;
        }

        .hot-topic-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        /* Data snapshot */
        .data-snapshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .data-snap-card {
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .data-snap-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
        }

        .data-snap-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-secondary);
            font-family: var(--font-mono);
            letter-spacing: -0.01em;
            margin-bottom: 6px;
        }

        .data-snap-label {
            font-size: 14px;
            color: var(--color-text-second);
            font-weight: 500;
        }

        /* Related topics */
        .related-topics-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .related-topic-card {
            display: flex;
            gap: 16px;
            align-items: center;
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 18px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
            text-decoration: none;
        }

        .related-topic-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }

        .related-topic-image {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background-color: var(--color-bg);
        }

        .related-topic-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .related-topic-info {
            flex: 1;
            min-width: 0;
        }

        .related-topic-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin: 0 0 4px 0;
            line-height: 1.4;
        }

        .related-topic-meta {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        /* Subscribe CTA */
        .subscribe-card {
            background-color: #ffffff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            gap: 32px;
            flex-wrap: wrap;
        }

        .subscribe-card-info {
            flex: 1;
            min-width: 260px;
        }

        .subscribe-card-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0 0 8px 0;
        }

        .subscribe-card-desc {
            font-size: 15px;
            color: var(--color-text-second);
            line-height: 1.7;
            margin: 0;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }

        .subscribe-form input[type="email"] {
            padding: 12px 18px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            min-width: 240px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
            background-color: #ffffff;
            color: var(--color-text);
        }

        .subscribe-form input[type="email"]:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 2px rgba(0, 201, 167, 0.15);
            outline: none;
        }

        .subscribe-form input[type="email"]::placeholder {
            color: var(--color-text-muted);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            padding-top: 64px;
            padding-bottom: 24px;
            color: var(--color-footer-text);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-logo {
            font-size: 20px;
            margin-bottom: 14px;
            color: #ffffff;
            display: inline-flex;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--color-footer-text);
            margin: 0;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin: 0 0 14px 0;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--color-footer-text);
            font-size: 14px;
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #ffffff;
        }

        .footer-subscribe p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-footer-text);
            margin: 0 0 14px 0;
        }

        .footer-subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-subscribe-form input {
            flex: 1;
            min-width: 140px;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 6px;
            font-size: 13px;
            background-color: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            transition: border-color var(--transition-base);
        }

        .footer-subscribe-form input::placeholder {
            color: var(--color-footer-text);
        }

        .footer-subscribe-form input:focus {
            border-color: var(--color-secondary);
            outline: none;
        }

        .footer-subscribe-form .btn-primary {
            background-color: var(--color-accent);
            border-color: var(--color-accent);
            color: #ffffff;
            padding: 10px 18px;
            font-size: 13px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            font-size: 13px;
            color: var(--color-footer-text);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-bottom-links a:hover {
            color: #ffffff;
        }

        .footer-bottom-links .sep {
            color: rgba(255, 255, 255, 0.2);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-snapshot-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero-grid {
                grid-template-columns: 1fr 240px;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            .section-padding {
                padding-top: 56px;
                padding-bottom: 56px;
            }
            .section-title {
                font-size: 24px;
            }
            .category-hero {
                padding-top: 36px;
                padding-bottom: 36px;
            }
            .category-hero-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero-image {
                aspect-ratio: 16/9;
                max-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .related-topics-grid {
                grid-template-columns: 1fr;
            }
            .subscribe-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 640px) {
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .data-snapshot-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 22px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                padding: 16px 20px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
                border-radius: 0 0 12px 12px;
                z-index: 99;
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                color: var(--color-text);
                font-size: 15px;
                padding: 10px 12px;
            }
            .main-nav a:hover {
                background-color: var(--color-bg);
                color: var(--color-secondary);
            }
            .main-nav a.active {
                color: var(--color-secondary);
            }
            .main-nav a.active::after {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 420px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .btn {
                padding: 10px 22px;
                font-size: 14px;
            }
            .subscribe-form input[type="email"] {
                min-width: 100%;
                width: 100%;
            }
            .subscribe-form .btn {
                width: 100%;
            }
            .footer-subscribe-form input {
                min-width: 100%;
                width: 100%;
            }
            .footer-subscribe-form .btn {
                width: 100%;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #161C27;
            --color-secondary: #00C9A7;
            --color-accent: #FF6B35;
            --color-decor: #7B2CBF;
            --color-bg: #F5F7FA;
            --color-card: #FFFFFF;
            --color-text: #1F2733;
            --color-text-second: #4A5568;
            --color-text-muted: #6B7686;
            --color-border: #E4E7EC;
            --color-footer-text: #9AA4B2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color var(--transition-base), border-color var(--transition-base), opacity var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--color-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        .section-padding-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .section-bg-light {
            background-color: var(--color-bg);
        }

        .section-bg-white {
            background-color: #ffffff;
        }

        .section-bg-dark {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .section-divider {
            border-top: 1px solid var(--color-border);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-secondary);
            margin-bottom: 14px;
            border-left: 3px solid var(--color-accent);
            padding-left: 10px;
            line-height: 1.4;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-title.light {
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 8px;
        }

        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            margin-bottom: 40px;
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-secondary {
            color: var(--color-secondary);
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: #E5592A;
            border-color: #E5592A;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
        }

        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            background-color: var(--color-primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .brand-logo:hover {
            color: var(--color-secondary);
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--color-secondary), #007f6e);
            border-radius: 8px;
            font-size: 16px;
            color: #ffffff;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: color var(--transition-base), border-color var(--transition-base);
        }

        .main-nav a:hover {
            color: var(--color-secondary);
        }

        .main-nav a.active {
            color: var(--color-secondary);
            border-bottom-color: var(--color-secondary);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #ffffff;
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: background-color var(--transition-base);
        }

        .nav-toggle:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            display: flex;
            align-items: center;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
            gap: 6px;
        }

        .breadcrumb-wrap a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .breadcrumb-wrap a:hover {
            color: var(--color-secondary);
        }

        .breadcrumb-sep {
            color: var(--color-border);
            font-size: 12px;
        }

        .breadcrumb-current {
            color: var(--color-text-second);
            font-weight: 600;
        }

        /* Category Hero (compact) */
        .category-hero {
            background-color: #ffffff;
            border-bottom: 1px solid var(--color-border);
            padding-top: 40px;
            padding-bottom: 40px;
        }

        .category-hero .row {
            align-items: center;
        }

        .category-hero h1 {
            font-size: 30px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
            letter-spacing: 0;
        }

        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 640px;
        }

        .category-hero .hero-side-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .category-hero .hero-side-image img {
            aspect-ratio: 4/3;
            object-fit: cover;
            width: 100%;
        }

        .stat-mini-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 12px;
            color: var(--color-text-second);
            margin-top: 12px;
            margin-right: 8px;
        }

        .stat-mini-badge i {
            color: var(--color-secondary);
        }

        /* Article cards grid */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--color-secondary);
        }

        .article-card .card-thumb {
            aspect-ratio: 4/3;
            overflow: hidden;
            position: relative;
        }

        .article-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .article-card:hover .card-thumb img {
            transform: scale(1.04);
        }

        .article-card .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card .card-date {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-card .card-date i {
            color: var(--color-secondary);
        }

        .article-card .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .card-excerpt {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }

        .read-more-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition-base), gap var(--transition-base);
        }

        .read-more-link:hover {
            color: var(--color-accent);
            gap: 10px;
        }

        .load-more-wrap {
            text-align: center;
            margin-top: 32px;
        }

        /* Hot content horizontal scroll */
        .hot-scroll {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding-bottom: 16px;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .hot-scroll::-webkit-scrollbar {
            display: none;
        }

        .hot-chip {
            flex: 0 0 auto;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: 10px 20px;
            font-size: 14px;
            color: var(--color-text-second);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition-base);
        }

        .hot-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        /* Data snapshot */
        .data-snapshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .snapshot-card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            padding: 24px 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

        .snapshot-card .snapshot-number {
            font-family: var(--font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--color-secondary);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .snapshot-card .snapshot-label {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: 6px;
        }

        /* Related topics */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

        .topic-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .topic-card .topic-thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .topic-card .topic-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .topic-card:hover .topic-thumb img {
            transform: scale(1.04);
        }

        .topic-card .topic-body {
            padding: 16px 18px 18px;
        }

        .topic-card .topic-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-decor);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 6px;
        }

        .topic-card .topic-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
        }

        /* Subscribe CTA */
        .subscribe-panel {
            background: linear-gradient(145deg, rgba(0, 201, 167, 0.08), rgba(255, 107, 53, 0.06));
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
        }

        .subscribe-panel .subscribe-info h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .subscribe-panel .subscribe-info p {
            font-size: 14px;
            color: var(--color-text-second);
            margin: 0;
        }

        .subscribe-form-inline {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .subscribe-form-inline input[type="email"] {
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            font-size: 14px;
            min-width: 260px;
            background: var(--color-card);
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .subscribe-form-inline input[type="email"]:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.18);
            outline: none;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-footer-text);
            padding-top: 56px;
            padding-bottom: 32px;
        }

        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--color-footer-text);
            margin: 0;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #ffffff;
        }

        .footer-subscribe p {
            font-size: 13px;
            color: var(--color-footer-text);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .footer-subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-subscribe-form input {
            flex: 1;
            min-width: 160px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.22);
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
            font-size: 13px;
            transition: border-color var(--transition-base), background-color var(--transition-base);
        }

        .footer-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-subscribe-form input:focus {
            border-color: var(--color-secondary);
            background: rgba(255, 255, 255, 0.14);
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.22);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--color-footer-text);
        }

        .footer-bottom a {
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-bottom a:hover {
            color: #ffffff;
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-bottom-links .sep {
            color: rgba(255, 255, 255, 0.25);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .data-snapshot-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--color-primary);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px;
                gap: 0;
                box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }

            .main-nav.nav-open {
                display: flex;
            }

            .main-nav a {
                padding: 12px 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                font-size: 15px;
            }

            .main-nav a.active {
                border-bottom-color: var(--color-secondary);
            }

            .category-hero h1 {
                font-size: 24px;
            }

            .category-hero .hero-side-image {
                margin-top: 20px;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .data-snapshot-grid {
                grid-template-columns: 1fr;
            }

            .subscribe-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 22px;
            }

            .subscribe-form-inline input[type="email"] {
                min-width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .section-title {
                font-size: 24px;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding-top: 28px;
                padding-bottom: 28px;
            }

            .category-hero h1 {
                font-size: 21px;
            }

            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }

            .article-card .card-title {
                font-size: 16px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #161C27;
            --color-secondary: #00C9A7;
            --color-accent: #FF6B35;
            --color-decor: #7B2CBF;
            --color-bg: #F5F7FA;
            --color-card: #FFFFFF;
            --color-text: #1F2733;
            --color-text-second: #4A5568;
            --color-text-muted: #6B7686;
            --color-border: #E4E7EC;
            --color-footer-text: #9AA4B2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color var(--transition-base), border-color var(--transition-base), opacity var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--color-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-padding-sm {
            padding-top: 56px;
            padding-bottom: 56px;
        }

        .section-bg-light {
            background-color: var(--color-bg);
        }

        .section-bg-white {
            background-color: #ffffff;
        }

        .section-bg-dark {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .section-divider {
            border-top: 1px solid var(--color-border);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-secondary);
            margin-bottom: 14px;
            border-left: 3px solid var(--color-accent);
            padding-left: 10px;
            line-height: 1.4;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-title.light {
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 8px;
        }

        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            margin-bottom: 44px;
        }

        .text-accent {
            color: var(--color-accent);
        }
        .text-secondary {
            color: var(--color-secondary);
        }
        .text-muted {
            color: var(--color-text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }
        .btn-primary:hover {
            background-color: #E5592A;
            border-color: #E5592A;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }
        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
        }
        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.4);
        }
        .btn-outline-light:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary);
            color: #ffffff;
            height: 64px;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #ffffff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .brand-logo:hover,
        .brand-logo:focus {
            color: #ffffff;
            opacity: 0.88;
        }
        .logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 6px;
            position: relative;
            transition: color var(--transition-base), background var(--transition-base);
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            color: var(--color-secondary);
            background: rgba(0, 201, 167, 0.08);
        }
        .main-nav a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 2px;
            background: var(--color-secondary);
            border-radius: 2px;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 18px;
            transition: all var(--transition-base);
        }
        .nav-toggle:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-second);
            transition: color var(--transition-base);
        }
        .breadcrumb a:hover {
            color: var(--color-secondary);
        }
        .breadcrumb .sep {
            color: var(--color-border);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            background: #ffffff;
            border-bottom: 1px solid var(--color-border);
            padding: 48px 0 56px;
        }
        .category-hero .grid-x {
            align-items: center;
        }
        .category-hero h1 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 18px;
            letter-spacing: 0;
        }
        .category-hero h1 .highlight {
            color: var(--color-accent);
        }
        .category-intro {
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text-second);
            max-width: 620px;
        }
        .category-hero-right {
            display: flex;
            flex-direction: column;
            gap: 16px;
            align-items: center;
        }
        .category-hero-image {
            width: 100%;
            max-width: 320px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
        }
        .category-hero-image img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .learning-progress-card {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            width: 100%;
            max-width: 320px;
        }
        .learning-progress-card .progress-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            color: var(--color-text-second);
            margin-bottom: 10px;
            font-weight: 500;
        }
        .learning-progress-card .progress-label strong {
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 700;
        }
        .progress-bar-track {
            width: 100%;
            height: 8px;
            background: #e9edf2;
            border-radius: 999px;
            overflow: hidden;
        }
        .progress-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
            border-radius: 999px;
            transition: width var(--transition-smooth);
        }
        .progress-hint {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: 8px;
        }

        /* Article Grid */
        .article-section {
            padding: 72px 0;
            background: var(--color-bg);
        }
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }
        .article-card-thumb {
            width: 100%;
            aspect-ratio: 4/3;
            overflow: hidden;
            position: relative;
        }
        .article-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .article-card:hover .article-card-thumb img {
            transform: scale(1.03);
        }
        .article-card-thumb .tag-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(22, 28, 39, 0.85);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            backdrop-filter: blur(4px);
            letter-spacing: 0.02em;
        }
        .article-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-date {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-card-date i {
            font-size: 12px;
            color: var(--color-secondary);
        }
        .article-card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--color-text);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-base);
        }
        .article-card:hover .article-card-title {
            color: var(--color-secondary);
        }
        .article-card-summary {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-second);
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .article-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-base);
            border-bottom: 1px solid transparent;
            align-self: flex-start;
        }
        .article-card-link:hover {
            color: var(--color-accent);
            border-bottom-color: var(--color-accent);
        }
        .article-card-link i {
            font-size: 12px;
            transition: transform var(--transition-base);
        }
        .article-card-link:hover i {
            transform: translateX(3px);
        }

        .view-more-wrap {
            text-align: center;
            margin-top: 36px;
        }
        .view-more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text-second);
            border: 1px solid var(--color-border);
            padding: 10px 24px;
            border-radius: 999px;
            background: #fff;
            transition: all var(--transition-base);
        }
        .view-more-link:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
        }

        /* Hot Content */
        .hot-content-section {
            padding: 72px 0;
            background: #ffffff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .hot-scroll {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            padding: 8px 2px 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
        }
        .hot-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .hot-scroll::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 999px;
        }
        .hot-chip {
            flex: 0 0 auto;
            scroll-snap-align: start;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-second);
            transition: all var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hot-chip i {
            color: var(--color-accent);
            font-size: 12px;
        }
        .hot-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        /* Data Snapshot */
        .data-snapshot-section {
            padding: 72px 0;
            background: var(--color-bg);
        }
        .snapshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .snapshot-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-base);
        }
        .snapshot-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-2px);
        }
        .snapshot-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 201, 167, 0.1);
            color: var(--color-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 20px;
        }
        .snapshot-number {
            font-family: var(--font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .snapshot-label {
            font-size: 14px;
            color: var(--color-text-second);
            margin-top: 6px;
            font-weight: 500;
        }

        /* Related Topics */
        .related-topics-section {
            padding: 72px 0;
            background: #ffffff;
            border-top: 1px solid var(--color-border);
        }
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .topic-item {
            display: block;
            background: var(--color-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-base);
            text-decoration: none;
        }
        .topic-item:hover {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .topic-item-thumb {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .topic-item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }
        .topic-item:hover .topic-item-thumb img {
            transform: scale(1.05);
        }
        .topic-item-body {
            padding: 16px 18px;
        }
        .topic-item-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-base);
        }
        .topic-item:hover .topic-item-title {
            color: var(--color-secondary);
        }
        .topic-item-count {
            font-size: 13px;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .topic-item-count i {
            color: var(--color-secondary);
            font-size: 12px;
        }

        /* Subscribe CTA */
        .subscribe-section {
            padding: 64px 0 80px;
            background: var(--color-bg);
        }
        .subscribe-card {
            background: linear-gradient(135deg, #1a2230 0%, #161C27 60%, #1e2a3a 100%);
            border-radius: var(--radius-lg);
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .subscribe-card::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(0, 201, 167, 0.12);
            pointer-events: none;
        }
        .subscribe-card::after {
            content: "";
            position: absolute;
            bottom: -40px;
            left: 30%;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(255, 107, 53, 0.08);
            pointer-events: none;
        }
        .subscribe-info {
            position: relative;
            z-index: 1;
            flex: 1;
        }
        .subscribe-info h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .subscribe-info p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            margin: 0;
            max-width: 520px;
        }
        .subscribe-form-wrapper {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
            display: flex;
            gap: 12px;
        }
        .subscribe-form-wrapper input[type="email"] {
            width: 280px;
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 15px;
            transition: all var(--transition-base);
        }
        .subscribe-form-wrapper input[type="email"]::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .subscribe-form-wrapper input[type="email"]:focus {
            border-color: var(--color-secondary);
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
            background: rgba(255, 255, 255, 0.12);
        }
        .subscribe-form-wrapper .btn-primary {
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            color: var(--color-footer-text);
            padding-top: 56px;
            padding-bottom: 24px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-logo {
            font-size: 18px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-footer-text);
            margin: 0;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: var(--color-footer-text);
            transition: color var(--transition-base);
            font-size: 14px;
        }
        .footer-col ul li a:hover {
            color: #ffffff;
        }
        .footer-subscribe p {
            font-size: 13px;
            color: var(--color-footer-text);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .footer-subscribe-form {
            display: flex;
            gap: 8px;
        }
        .footer-subscribe-form input[type="email"] {
            flex: 1;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 13px;
            transition: all var(--transition-base);
            min-width: 0;
        }
        .footer-subscribe-form input[type="email"]::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-subscribe-form input[type="email"]:focus {
            border-color: var(--color-secondary);
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .footer-subscribe-form .btn-primary {
            padding: 10px 18px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
        }
        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-bottom-links a {
            color: var(--color-footer-text);
            transition: color var(--transition-base);
        }
        .footer-bottom-links a:hover {
            color: #ffffff;
        }
        .footer-bottom-links .sep {
            color: rgba(255, 255, 255, 0.25);
            user-select: none;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero h1 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: inline-flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 20px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
                border-bottom: 1px solid var(--color-border);
                z-index: 200;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                color: var(--color-text);
                padding: 12px 16px;
                border-radius: 8px;
                font-size: 15px;
                font-weight: 500;
                border-bottom: 1px solid var(--color-border);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .main-nav a.active {
                color: var(--color-secondary);
                background: rgba(0, 201, 167, 0.06);
            }
            .main-nav a.active::after {
                display: none;
            }
            .main-nav a:hover,
            .main-nav a:focus {
                background: var(--color-bg);
            }

            .category-hero {
                padding: 32px 0 40px;
            }
            .category-hero .grid-x {
                flex-direction: column;
                gap: 24px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-intro {
                font-size: 15px;
            }
            .category-hero-right {
                width: 100%;
            }
            .category-hero-image,
            .learning-progress-card {
                max-width: 100%;
            }
            .category-hero-image img {
                height: 160px;
            }
            .section-title {
                font-size: 22px;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .snapshot-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .topics-grid {
                grid-template-columns: 1fr;
            }
            .subscribe-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 24px;
            }
            .subscribe-form-wrapper {
                flex-direction: column;
                width: 100%;
            }
            .subscribe-form-wrapper input[type="email"] {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
        }

        @media (max-width: 520px) {
            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .section-padding-sm {
                padding-top: 36px;
                padding-bottom: 36px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-hero h1 {
                font-size: 21px;
            }
            .category-intro {
                font-size: 14px;
            }
            .article-card-body {
                padding: 16px 18px 18px;
            }
            .article-card-title {
                font-size: 16px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            .hot-chip {
                padding: 8px 16px;
                font-size: 13px;
            }
            .subscribe-card {
                padding: 24px 20px;
            }
            .subscribe-info h3 {
                font-size: 20px;
            }
        }

/* roulang page: category6 */
:root {
            --color-primary: #161C27;
            --color-secondary: #00C9A7;
            --color-accent: #FF6B35;
            --color-decor: #7B2CBF;
            --color-bg: #F5F7FA;
            --color-card: #FFFFFF;
            --color-text: #1F2733;
            --color-text-second: #4A5568;
            --color-text-muted: #6B7686;
            --color-border: #E4E7EC;
            --color-footer-text: #9AA4B2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', 'Roboto Mono', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color var(--transition-base), border-color var(--transition-base), opacity var(--transition-base);
        }

        a:hover,
        a:focus {
            color: var(--color-accent);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        button,
        input {
            font-family: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-padding {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        .section-padding-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .section-bg-light {
            background-color: var(--color-bg);
        }

        .section-bg-white {
            background-color: #ffffff;
        }

        .section-bg-dark {
            background-color: var(--color-primary);
            color: #ffffff;
        }

        .section-divider {
            border-top: 1px solid var(--color-border);
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-secondary);
            margin-bottom: 14px;
            border-left: 3px solid var(--color-accent);
            padding-left: 10px;
            line-height: 1.4;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 0;
            color: var(--color-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .section-title.light {
            color: #ffffff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-second);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 8px;
        }

        .section-subtitle.light {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            margin-bottom: 40px;
        }

        .text-accent {
            color: var(--color-accent);
        }

        .text-secondary {
            color: var(--color-secondary);
        }

        .text-muted {
            color: var(--color-text-muted);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: all var(--transition-base);
            border: 1px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background-color: #E5592A;
            border-color: #E5592A;
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            transform: translateY(-1px);
        }

        .btn-light {
            background-color: #ffffff;
            color: var(--color-primary);
            border-color: #ffffff;
        }

        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #ffffff;
            border: 1px solid rgba(255, 255, 255, 0.4);
        }

        .btn-outline-light:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: var(--color-primary);
            height: 64px;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .brand-logo:hover {
            color: var(--color-secondary);
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--color-secondary), #00A88F);
            border-radius: 8px;
            color: #fff;
            font-size: 16px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.82);
            text-decoration: none;
            border-bottom: 2px solid transparent;
            transition: all var(--transition-base);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .main-nav a:hover {
            color: var(--color-secondary);
        }

        .main-nav a.active {
            color: var(--color-secondary);
            border-bottom-color: var(--color-secondary);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-base);
        }

        .breadcrumb a:hover {
            color: var(--color-secondary);
        }

        .breadcrumb .separator {
            color: rgba(255, 255, 255, 0.35);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--color-secondary);
            font-weight: 500;
        }

        /* Category Hero */
        .category-hero {
            background: linear-gradient(135deg, #161C27 0%, #1D2635 55%, #222D3D 100%);
            padding: 56px 0 48px;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 201, 167, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: 30%;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: flex-start;
            gap: 40px;
        }

        .category-hero-main {
            flex: 1;
            min-width: 0;
        }

        .category-hero-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 12px;
            letter-spacing: 0;
        }

        .category-hero-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.8;
            max-width: 640px;
        }

        .category-hero-side {
            flex-shrink: 0;
            width: 280px;
        }

        .hero-stat-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            text-align: center;
        }

        .hero-stat-card .stat-number {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .hero-stat-card .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            letter-spacing: 0.03em;
        }

        .hero-stat-card .stat-divider {
            width: 40px;
            height: 2px;
            background: var(--color-accent);
            margin: 10px auto 8px;
            border-radius: 2px;
        }

        /* Article Grid */
        .article-grid-section {
            padding-top: 56px;
            padding-bottom: 64px;
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--color-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-secondary);
            transform: translateY(-3px);
        }

        .article-card-image {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            position: relative;
            background: var(--color-bg);
        }

        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .article-card:hover .article-card-image img {
            transform: scale(1.03);
        }

        .article-card-date-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(22, 28, 39, 0.8);
            color: #fff;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 10px;
            border-radius: 999px;
            letter-spacing: 0.02em;
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .article-card-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            letter-spacing: 0;
        }

        .article-card-summary {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }

        .article-card-date {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .article-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-secondary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: color var(--transition-base), gap var(--transition-base);
        }

        .article-link:hover {
            color: var(--color-accent);
            gap: 8px;
        }

        .article-link i {
            font-size: 12px;
        }

        .view-more-wrapper {
            text-align: center;
            margin-top: 36px;
        }

        .view-more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-secondary);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: 12px 32px;
            text-decoration: none;
            transition: all var(--transition-base);
            background: #fff;
        }

        .view-more-link:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }

        /* Hot Content */
        .hot-content-section {
            background: #fff;
            padding-top: 56px;
            padding-bottom: 56px;
        }

        .hot-scroll {
            display: flex;
            gap: 16px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 8px;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .hot-scroll::-webkit-scrollbar {
            display: none;
        }

        .hot-chip {
            flex-shrink: 0;
            scroll-snap-align: start;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-second);
            cursor: default;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .hot-chip:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            background: #fff;
        }

        .hot-chip .tag-icon {
            color: var(--color-accent);
            margin-right: 6px;
            font-size: 12px;
        }

        /* Data Snapshot */
        .data-snapshot-section {
            background: var(--color-primary);
            padding-top: 48px;
            padding-bottom: 48px;
            color: #fff;
        }

        .data-snapshot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .snapshot-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .snapshot-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(0, 201, 167, 0.35);
        }

        .snapshot-number {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.3;
            margin-bottom: 4px;
        }

        .snapshot-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            letter-spacing: 0.02em;
        }

        /* Related Topics */
        .related-topics-section {
            background: #fff;
            padding-top: 56px;
            padding-bottom: 56px;
        }

        .related-topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            display: flex;
            align-items: center;
            gap: 14px;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            transition: all var(--transition-base);
            cursor: default;
        }

        .topic-card:hover {
            border-color: var(--color-secondary);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .topic-card-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 201, 167, 0.15), rgba(0, 201, 167, 0.04));
            border-radius: var(--radius-sm);
            color: var(--color-secondary);
            font-size: 18px;
        }

        .topic-card-text h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 3px;
            letter-spacing: 0;
        }

        .topic-card-text p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.5;
            margin: 0;
        }

        /* Subscribe CTA */
        .subscribe-cta-section {
            padding-top: 56px;
            padding-bottom: 64px;
            background: var(--color-bg);
        }

        .subscribe-cta-card {
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            box-shadow: var(--shadow-sm);
            flex-wrap: wrap;
        }

        .subscribe-cta-text {
            flex: 1;
            min-width: 260px;
        }

        .subscribe-cta-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            letter-spacing: 0;
        }

        .subscribe-cta-text p {
            font-size: 14px;
            color: var(--color-text-second);
            line-height: 1.7;
            margin: 0;
        }

        .subscribe-cta-form {
            display: flex;
            gap: 10px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        .subscribe-cta-form input[type="email"] {
            min-width: 240px;
            padding: 12px 18px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--color-text);
            background: #fff;
            transition: all var(--transition-base);
            outline: none;
        }

        .subscribe-cta-form input[type="email"]:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 2px rgba(0, 201, 167, 0.2);
        }

        .subscribe-cta-form input::placeholder {
            color: var(--color-text-muted);
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            padding: 56px 0 0;
            color: var(--color-footer-text);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.75;
            margin-top: 14px;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #ffffff;
        }

        .footer-subscribe p {
            font-size: 14px;
            color: var(--color-footer-text);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .footer-subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-subscribe-form input[type="email"] {
            flex: 1;
            min-width: 160px;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 13px;
            outline: none;
            transition: all var(--transition-base);
        }

        .footer-subscribe-form input[type="email"]:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 2px rgba(0, 201, 167, 0.2);
        }

        .footer-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-subscribe-form .btn {
            padding: 10px 18px;
            font-size: 13px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 13px;
            color: var(--color-footer-text);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-bottom-links a {
            color: var(--color-footer-text);
            text-decoration: none;
            transition: color var(--transition-base);
            font-size: 13px;
        }

        .footer-bottom-links a:hover {
            color: #ffffff;
        }

        .footer-bottom-links .sep {
            color: rgba(255, 255, 255, 0.2);
        }

        .footer-bottom-links a[href*="kuaizhiboplus.com.cn"] {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom-links a[href*="kuaizhiboplus.com.cn"]:hover {
            color: #ffffff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .category-hero .container {
                flex-direction: column;
                gap: 24px;
            }
            .category-hero-side {
                width: 100%;
            }
            .data-snapshot-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: #fff;
                padding: 16px 20px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                align-items: stretch;
                gap: 2px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                color: var(--color-text);
                padding: 12px 14px;
                border-bottom: 1px solid var(--color-border);
                font-size: 15px;
            }
            .main-nav a:hover {
                color: var(--color-secondary);
            }
            .main-nav a.active {
                color: var(--color-secondary);
                border-bottom-color: var(--color-border);
                background: rgba(0, 201, 167, 0.05);
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: block;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .related-topics-grid {
                grid-template-columns: 1fr;
            }
            .data-snapshot-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .subscribe-cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 22px;
            }
            .subscribe-cta-form {
                width: 100%;
            }
            .subscribe-cta-form input[type="email"] {
                min-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .category-hero-title {
                font-size: 26px;
            }
            .category-hero {
                padding: 36px 0 32px;
            }
            .section-title {
                font-size: 23px;
            }
            .section-padding {
                padding-top: 48px;
                padding-bottom: 48px;
            }
        }

        @media (max-width: 520px) {
            .category-hero-title {
                font-size: 22px;
            }
            .category-hero-desc {
                font-size: 14px;
            }
            .article-card-title {
                font-size: 15px;
            }
            .article-card-summary {
                font-size: 13px;
            }
            .snapshot-number {
                font-size: 22px;
            }
            .btn {
                padding: 10px 22px;
                font-size: 14px;
            }
        }