/* roulang page: index */
:root {
            --brand-50: #eff6ff;
            --brand-100: #dbeafe;
            --brand-200: #bfdbfe;
            --brand-300: #93c5fd;
            --brand-400: #60a5fa;
            --brand-500: #3b82f6;
            --brand-600: #2563eb;
            --brand-700: #1d4ed8;
            --brand-800: #1e40af;
            --brand-900: #1e3a8a;
            --ink-50: #f8fafc;
            --ink-100: #f1f5f9;
            --ink-200: #e2e8f0;
            --ink-300: #cbd5e1;
            --ink-400: #94a3b8;
            --ink-500: #64748b;
            --ink-600: #475569;
            --ink-700: #334155;
            --ink-800: #1e293b;
            --ink-900: #0f172a;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #ef4444;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
            --shadow-card: 0 1px 3px rgba(15,23,42,0.06), 0 8px 24px rgba(15,23,42,0.06);
            --shadow-card-hover: 0 4px 10px rgba(15,23,42,0.08), 0 16px 40px rgba(15,23,42,0.12);
            --shadow-nav: 0 1px 0 rgba(15,23,42,0.06), 0 4px 16px rgba(15,23,42,0.04);
            --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
            --transition-base: 250ms cubic-bezier(0.4,0,0.2,1);
            --transition-slow: 350ms cubic-bezier(0.4,0,0.2,1);
        }

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

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

        body {
            font-family: 'Inter','PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            line-height: 1.6;
            color: var(--ink-800);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        button,
        input,
        select,
        textarea {
            font: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        :focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (min-width: 640px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--ink-200);
            box-shadow: var(--shadow-nav);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            min-height: 68px;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }

        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--ink-900);
            flex-shrink: 0;
            letter-spacing: -0.01em;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-400));
            color: #ffffff;
            font-size: 0.95rem;
            box-shadow: 0 4px 12px rgba(37,99,235,0.25);
        }

        .desktop-nav {
            display: none;
            align-items: center;
            gap: 0.25rem;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--ink-600);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--brand-700);
            background: var(--brand-50);
        }

        .nav-link.active {
            color: var(--brand-700);
            background: var(--brand-100);
            font-weight: 600;
        }

        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
            background: linear-gradient(135deg, #fef3c7, #fde68a);
            color: #92400e;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .header-cta {
            display: none;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.25rem;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            font-size: 0.88rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 14px rgba(37,99,235,0.28);
            white-space: nowrap;
        }

        .header-cta:hover {
            box-shadow: 0 6px 20px rgba(37,99,235,0.38);
            transform: translateY(-1px);
        }

        .header-cta:active {
            transform: translateY(0);
            box-shadow: 0 3px 10px rgba(37,99,235,0.22);
        }

        .mobile-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--ink-200);
            background: #ffffff;
            color: var(--ink-700);
            font-size: 1.1rem;
            transition: all var(--transition-fast);
        }

        .mobile-toggle:hover {
            background: var(--ink-50);
            border-color: var(--ink-300);
        }

        .mobile-menu {
            display: none;
            border-top: 1px solid var(--ink-200);
            background: #ffffff;
            padding: 0.75rem 1.5rem 1.25rem;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0.5rem;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--ink-700);
            border-bottom: 1px solid var(--ink-100);
            transition: all var(--transition-fast);
        }

        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: var(--brand-700);
            background: var(--brand-50);
        }

        .mobile-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            width: 100%;
            margin-top: 0.75rem;
            padding: 0.75rem 1.25rem;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37,99,235,0.28);
        }

        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
            }
            .header-cta {
                display: inline-flex;
            }
            .mobile-toggle {
                display: none;
            }
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== Section Base ===== */
        .section {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }

        @media (min-width: 768px) {
            .section {
                padding-top: 5rem;
                padding-bottom: 5rem;
            }
        }

        .section-alt {
            background: var(--ink-50);
        }

        .section-white {
            background: #ffffff;
        }

        .section-dark {
            background: var(--ink-900);
            color: #e2e8f0;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            background: var(--brand-50);
            color: var(--brand-700);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            border: 1px solid var(--brand-100);
        }

        .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--ink-900);
            letter-spacing: -0.02em;
            margin-top: 0.75rem;
            line-height: 1.3;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
        }

        .section-desc {
            font-size: 0.95rem;
            color: var(--ink-500);
            line-height: 1.75;
            margin-top: 0.75rem;
            max-width: 700px;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding-top: 3rem;
            padding-bottom: 3rem;
            background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
            overflow: hidden;
        }

        @media (min-width: 768px) {
            .hero {
                padding-top: 4rem;
                padding-bottom: 4rem;
            }
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/dc11d50e9e2407c9.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            align-items: center;
        }

        @media (min-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1.2fr 0.8fr;
                gap: 3rem;
            }
        }

        .hero-content h1 {
            font-size: 1.85rem;
            font-weight: 800;
            color: var(--ink-900);
            letter-spacing: -0.025em;
            line-height: 1.25;
            margin-bottom: 1rem;
        }

        @media (min-width: 768px) {
            .hero-content h1 {
                font-size: 2.4rem;
            }
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-bottom: 1.25rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.35rem 0.85rem;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 500;
            background: #ffffff;
            border: 1px solid var(--ink-200);
            color: var(--ink-600);
            box-shadow: 0 1px 2px rgba(15,23,42,0.04);
        }

        .hero-badge i {
            color: var(--brand-500);
            font-size: 0.7rem;
        }

        .hero-desc {
            font-size: 0.95rem;
            color: var(--ink-600);
            line-height: 1.8;
            margin-bottom: 1.5rem;
            max-width: 560px;
        }

        @media (min-width: 768px) {
            .hero-desc {
                font-size: 1rem;
            }
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(37,99,235,0.28);
        }

        .btn-primary:hover {
            box-shadow: 0 6px 22px rgba(37,99,235,0.4);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 3px 10px rgba(37,99,235,0.22);
        }

        .btn-secondary {
            background: #ffffff;
            color: var(--ink-700);
            border: 1px solid var(--ink-200);
            box-shadow: 0 1px 3px rgba(15,23,42,0.04);
        }

        .btn-secondary:hover {
            border-color: var(--ink-300);
            background: var(--ink-50);
            color: var(--ink-900);
        }

        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 1px solid rgba(255,255,255,0.3);
        }

        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.5);
        }

        .hero-panel {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.85rem;
        }

        .hero-stat-card {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-lg);
            padding: 1.25rem 1rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

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

        .hero-stat-number {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--brand-700);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--ink-500);
            margin-top: 0.3rem;
            font-weight: 500;
        }

        /* ===== Cards Grid ===== */
        .grid-cards {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
            margin-top: 2rem;
        }

        @media (min-width: 640px) {
            .grid-cards {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .grid-cards {
                grid-template-columns: repeat(3, 1fr);
                gap: 1.5rem;
            }
        }

        .grid-cards-4 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
            margin-top: 2rem;
        }

        @media (min-width: 768px) {
            .grid-cards-4 {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.25rem;
            }
        }

        .card {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--brand-200);
        }

        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 1.1rem;
            margin-bottom: 1rem;
            transition: all var(--transition-base);
        }

        .card:hover .card-icon {
            background: var(--brand-600);
            color: #ffffff;
        }

        .card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
        }

        .card-text {
            font-size: 0.85rem;
            color: var(--ink-500);
            line-height: 1.7;
        }

        /* ===== Media Card ===== */
        .media-card {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .media-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--brand-200);
        }

        .media-card-image {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            background: var(--ink-100);
        }

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

        .media-card:hover .media-card-image img {
            transform: scale(1.04);
        }

        .media-card-tag {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.3rem 0.7rem;
            border-radius: 999px;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(8px);
            color: var(--brand-700);
            font-size: 0.7rem;
            font-weight: 600;
            border: 1px solid rgba(37,99,235,0.15);
        }

        .media-card-body {
            padding: 1.1rem 1.25rem 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .media-card-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 0.4rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .media-card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.78rem;
            color: var(--ink-400);
            margin-top: auto;
            padding-top: 0.6rem;
        }

        .media-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        /* ===== Feature List ===== */
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 2rem;
        }

        .feature-item {
            display: flex;
            gap: 1rem;
            padding: 1.25rem;
            border-radius: var(--radius-lg);
            background: #ffffff;
            border: 1px solid var(--ink-200);
            transition: all var(--transition-base);
        }

        .feature-item:hover {
            border-color: var(--brand-300);
            box-shadow: var(--shadow-card-hover);
            transform: translateX(4px);
        }

        .feature-item-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 0.95rem;
        }

        .feature-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 0.25rem;
        }

        .feature-item p {
            font-size: 0.83rem;
            color: var(--ink-500);
            line-height: 1.7;
        }

        /* ===== Info List / News ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            margin-top: 2rem;
        }

        @media (min-width: 1024px) {
            .news-layout {
                grid-template-columns: 1.5fr 1fr;
                gap: 2rem;
            }
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem 1.15rem;
            border-radius: var(--radius-md);
            background: #ffffff;
            border: 1px solid var(--ink-200);
            transition: all var(--transition-fast);
        }

        .news-item:hover {
            border-color: var(--brand-300);
            background: var(--brand-50);
            box-shadow: var(--shadow-card);
        }

        .news-item-info {
            flex: 1;
            min-width: 0;
        }

        .news-item-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--ink-900);
            line-height: 1.5;
            margin-bottom: 0.25rem;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item-excerpt {
            font-size: 0.8rem;
            color: var(--ink-500);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item-meta {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.72rem;
            color: var(--ink-400);
            margin-top: 0.4rem;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .sidebar-card {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-lg);
            padding: 1.35rem;
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h4 {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card h4 i {
            color: var(--brand-500);
        }

        .sidebar-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .sidebar-list li {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.83rem;
            color: var(--ink-600);
            padding: 0.4rem 0;
            border-bottom: 1px solid var(--ink-100);
        }

        .sidebar-list li:last-child {
            border-bottom: none;
        }

        .sidebar-list i {
            color: var(--brand-500);
            font-size: 0.7rem;
            flex-shrink: 0;
        }

        /* ===== Stats Row ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
            margin-top: 2rem;
        }

        @media (min-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.25rem;
            }
        }

        .stat-block {
            text-align: center;
            padding: 1.5rem 1rem;
            border-radius: var(--radius-lg);
            background: #ffffff;
            border: 1px solid var(--ink-200);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

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

        .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--brand-700);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.82rem;
            color: var(--ink-500);
            margin-top: 0.3rem;
            font-weight: 500;
        }

        /* ===== Comparison Table-like ===== */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
            margin-top: 2rem;
        }

        @media (min-width: 768px) {
            .compare-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 1.5rem;
            }
        }

        .compare-card {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            position: relative;
            transition: all var(--transition-base);
        }

        .compare-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--brand-300);
            transform: translateY(-3px);
        }

        .compare-card.highlight {
            border-color: var(--brand-500);
            background: var(--brand-50);
            box-shadow: 0 4px 20px rgba(37,99,235,0.15);
        }

        .compare-card-tag {
            display: inline-block;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            background: var(--brand-600);
            color: #ffffff;
            font-size: 0.7rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        .compare-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 0.5rem;
        }

        .compare-card p {
            font-size: 0.83rem;
            color: var(--ink-500);
            line-height: 1.7;
        }

        /* ===== Changelog ===== */
        .changelog {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin-top: 2rem;
            position: relative;
        }

        .changelog::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 12px;
            bottom: 12px;
            width: 2px;
            background: var(--brand-200);
        }

        .changelog-item {
            display: flex;
            gap: 1.25rem;
            padding: 0.75rem 0;
            position: relative;
        }

        .changelog-dot {
            flex-shrink: 0;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--brand-600);
            border: 3px solid #ffffff;
            box-shadow: 0 0 0 2px var(--brand-300);
            margin-top: 0.2rem;
            z-index: 1;
        }

        .changelog-content h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 0.25rem;
        }

        .changelog-content p {
            font-size: 0.8rem;
            color: var(--ink-500);
            line-height: 1.7;
        }

        .changelog-time {
            font-size: 0.72rem;
            color: var(--ink-400);
            margin-top: 0.25rem;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            margin-top: 2rem;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-md);
            padding: 1.15rem 1.25rem;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--brand-300);
            box-shadow: var(--shadow-card);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--ink-900);
            list-style: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary i {
            color: var(--brand-500);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-item[open] summary i {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            font-size: 0.85rem;
            color: var(--ink-500);
            line-height: 1.75;
            margin-top: 0.75rem;
            padding-top: 0.75rem;
            border-top: 1px solid var(--ink-100);
        }

        /* ===== CTA Band ===== */
        .cta-band {
            background: linear-gradient(135deg, var(--ink-900) 0%, #1e3a5f 50%, var(--brand-900) 100%);
            border-radius: var(--radius-2xl);
            padding: 3rem 2rem;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/c29f1ee690dcb06e.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            pointer-events: none;
        }

        .cta-band > * {
            position: relative;
            z-index: 1;
        }

        .cta-band h2 {
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }

        @media (min-width: 768px) {
            .cta-band h2 {
                font-size: 2rem;
            }
        }

        .cta-band p {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.8);
            line-height: 1.75;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 1.5rem;
        }

        .cta-band .btn-primary {
            background: #ffffff;
            color: var(--brand-700);
            box-shadow: 0 4px 20px rgba(255,255,255,0.25);
        }

        .cta-band .btn-primary:hover {
            box-shadow: 0 6px 28px rgba(255,255,255,0.35);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding-top: 3.5rem;
            padding-bottom: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(148,163,184,0.15);
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 2.5rem;
            }
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            font-size: 0.83rem;
            line-height: 1.75;
            color: #94a3b8;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.85rem;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-col ul a {
            font-size: 0.83rem;
            color: #94a3b8;
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

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

        .footer-col ul a i {
            font-size: 0.65rem;
            color: #475569;
        }

        .footer-bottom {
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.78rem;
            color: #64748b;
        }

        .footer-bottom a {
            color: #94a3b8;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        /* ===== Empty state ===== */
        .empty-state {
            text-align: center;
            padding: 2rem 1.5rem;
            color: var(--ink-500);
            font-size: 0.9rem;
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px dashed var(--ink-300);
        }

        /* ===== Section Divider ===== */
        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--ink-200), transparent);
            margin: 0;
        }

        /* ===== Category Entry Cards ===== */
        .category-entry-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
            margin-top: 2rem;
        }

        @media (min-width: 768px) {
            .category-entry-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.25rem;
            }
        }

        .category-entry-card {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 0.6rem;
            padding: 1.35rem 1.25rem;
            border-radius: var(--radius-lg);
            background: #ffffff;
            border: 1px solid var(--ink-200);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            text-align: left;
        }

        .category-entry-card:hover {
            border-color: var(--brand-300);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .category-entry-card i {
            font-size: 1.2rem;
            color: var(--brand-500);
        }

        .category-entry-card h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--ink-900);
        }

        .category-entry-card span {
            font-size: 0.78rem;
            color: var(--ink-500);
        }

/* roulang page: category1 */
:root {
            --brand-50: #eff6ff;
            --brand-100: #dbeafe;
            --brand-200: #bfdbfe;
            --brand-300: #93c5fd;
            --brand-400: #60a5fa;
            --brand-500: #3b82f6;
            --brand-600: #2563eb;
            --brand-700: #1d4ed8;
            --brand-800: #1e40af;
            --brand-900: #1e3a8a;
            --ink-50: #f8fafc;
            --ink-100: #f1f5f9;
            --ink-200: #e2e8f0;
            --ink-300: #cbd5e1;
            --ink-400: #94a3b8;
            --ink-500: #64748b;
            --ink-600: #475569;
            --ink-700: #334155;
            --ink-800: #1e293b;
            --ink-900: #0f172a;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #ef4444;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
            --shadow-card: 0 1px 3px rgba(15,23,42,0.06), 0 8px 24px rgba(15,23,42,0.06);
            --shadow-card-hover: 0 4px 10px rgba(15,23,42,0.08), 0 16px 40px rgba(15,23,42,0.12);
            --shadow-nav: 0 1px 0 rgba(15,23,42,0.06), 0 4px 16px rgba(15,23,42,0.04);
            --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
            --transition-base: 250ms cubic-bezier(0.4,0,0.2,1);
            --transition-slow: 350ms cubic-bezier(0.4,0,0.2,1);
        }

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

        body {
            font-family: 'Inter','PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            line-height: 1.6;
            color: var(--ink-800);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        button,
        input,
        select,
        textarea {
            font: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            background: none;
            border: none;
        }

        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (min-width: 640px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--ink-200);
            box-shadow: var(--shadow-nav);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            min-height: 68px;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }

        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--ink-900);
            flex-shrink: 0;
            letter-spacing: -0.01em;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-400));
            color: #ffffff;
            font-size: 0.95rem;
            box-shadow: 0 4px 12px rgba(37,99,235,0.25);
        }

        .desktop-nav {
            display: none;
            align-items: center;
            gap: 0.25rem;
        }

        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
            }
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--ink-600);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--brand-700);
            background: var(--brand-50);
        }

        .nav-link.active {
            color: var(--brand-700);
            background: var(--brand-100);
            font-weight: 600;
        }

        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
            background: linear-gradient(135deg, #fef3c7, #fde68a);
            color: #92400e;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        @media (min-width: 640px) {
            .nav-badge {
                display: inline-flex;
            }
        }

        .header-cta {
            display: none;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.25rem;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            font-size: 0.88rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 14px rgba(37,99,235,0.28);
            white-space: nowrap;
        }

        .header-cta:hover {
            background: linear-gradient(135deg, var(--brand-700), var(--brand-600));
            box-shadow: 0 6px 18px rgba(37,99,235,0.36);
            transform: translateY(-1px);
        }

        @media (min-width: 768px) {
            .header-cta {
                display: inline-flex;
            }
        }

        .mobile-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--ink-200);
            color: var(--ink-700);
            background: #ffffff;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .mobile-toggle:hover {
            background: var(--brand-50);
            border-color: var(--brand-300);
            color: var(--brand-700);
        }

        @media (min-width: 768px) {
            .mobile-toggle {
                display: none;
            }
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 0.5rem;
            padding: 1rem 1.5rem 1.25rem;
            border-top: 1px solid var(--ink-100);
            background: rgba(255,255,255,0.98);
        }

        .mobile-menu.open {
            display: flex;
        }

        @media (min-width: 768px) {
            .mobile-menu {
                display: none !important;
            }
        }

        .mobile-nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.7rem 1rem;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--ink-700);
            transition: all var(--transition-fast);
        }

        .mobile-nav-link:hover {
            background: var(--brand-50);
            color: var(--brand-700);
        }

        .mobile-nav-link.active {
            background: var(--brand-100);
            color: var(--brand-700);
            font-weight: 600;
        }

        .mobile-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.25rem;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            font-size: 0.92rem;
            font-weight: 600;
            margin-top: 0.25rem;
            box-shadow: 0 4px 14px rgba(37,99,235,0.28);
            transition: all var(--transition-fast);
        }

        .mobile-cta:hover {
            background: linear-gradient(135deg, var(--brand-700), var(--brand-600));
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(30,58,138,0.92), rgba(37,99,235,0.82)), url('/assets/images/dc11d50e9e2407c9.webp') center/cover no-repeat;
            color: #ffffff;
            overflow: hidden;
        }

        @media (min-width: 768px) {
            .category-hero {
                min-height: 640px;
            }
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 20%, rgba(255,255,255,0.08), transparent 55%);
            pointer-events: none;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding-top: 4rem;
            padding-bottom: 4rem;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            background: rgba(255,255,255,0.14);
            border: 1px solid rgba(255,255,255,0.25);
            font-size: 0.82rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: 1.5rem;
            backdrop-filter: blur(8px);
        }

        .category-hero h1 {
            font-size: 2.4rem;
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
            color: #ffffff;
            max-width: 800px;
        }

        @media (min-width: 768px) {
            .category-hero h1 {
                font-size: 3.4rem;
            }
        }

        .category-hero .hero-subtitle {
            font-size: 1.08rem;
            line-height: 1.75;
            color: rgba(255,255,255,0.88);
            max-width: 700px;
            margin-bottom: 2rem;
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 1.25rem 2.5rem;
            margin-bottom: 2.5rem;
        }

        .hero-metric {
            display: flex;
            flex-direction: column;
            gap: 0.15rem;
        }

        .hero-metric .metric-value {
            font-size: 1.6rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: -0.01em;
        }

        .hero-metric .metric-label {
            font-size: 0.82rem;
            color: rgba(255,255,255,0.72);
            font-weight: 400;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .btn-primary-hero {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            padding: 0.85rem 2rem;
            border-radius: 12px;
            background: #ffffff;
            color: var(--brand-700);
            font-size: 0.95rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            box-shadow: 0 6px 24px rgba(0,0,0,0.18);
        }

        .btn-primary-hero:hover {
            background: var(--brand-50);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.22);
        }

        .btn-ghost-hero {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            padding: 0.85rem 1.75rem;
            border-radius: 12px;
            background: rgba(255,255,255,0.12);
            border: 1px solid rgba(255,255,255,0.3);
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            backdrop-filter: blur(8px);
        }

        .btn-ghost-hero:hover {
            background: rgba(255,255,255,0.22);
            border-color: rgba(255,255,255,0.45);
            transform: translateY(-2px);
        }

        /* ===== Section ===== */
        .section {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }

        @media (min-width: 768px) {
            .section {
                padding-top: 5rem;
                padding-bottom: 5rem;
            }
        }

        .section-alt {
            background: var(--ink-50);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 0.95rem;
            border-radius: 999px;
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 1rem;
        }

        .section-title {
            font-size: 1.7rem;
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: -0.015em;
            color: var(--ink-900);
            margin-bottom: 0.85rem;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 2.1rem;
            }
        }

        .section-desc {
            font-size: 1rem;
            line-height: 1.75;
            color: var(--ink-600);
            max-width: 720px;
        }

        /* ===== Cards ===== */
        .feature-card {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--brand-200);
        }

        .feature-card .card-image {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            background: var(--ink-100);
        }

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

        .feature-card:hover .card-image img {
            transform: scale(1.04);
        }

        .feature-card .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
        }

        .card-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.18rem 0.65rem;
            border-radius: 999px;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 0.72rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        .card-title {
            font-size: 1.08rem;
            font-weight: 600;
            color: var(--ink-900);
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
        }

        .card-desc {
            font-size: 0.9rem;
            color: var(--ink-600);
            line-height: 1.65;
        }

        /* ===== Data board ===== */
        .data-board {
            background: linear-gradient(135deg, var(--ink-900), var(--brand-900));
            border-radius: var(--radius-2xl);
            padding: 2.5rem 1.5rem;
            color: #ffffff;
            box-shadow: 0 20px 50px rgba(15,23,42,0.25);
        }

        @media (min-width: 768px) {
            .data-board {
                padding: 3rem 3rem;
            }
        }

        .data-item {
            text-align: center;
            padding: 1rem 0.5rem;
        }

        .data-value {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #ffffff;
            line-height: 1.3;
        }

        @media (min-width: 768px) {
            .data-value {
                font-size: 2.5rem;
            }
        }

        .data-label {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.72);
            margin-top: 0.25rem;
        }

        /* ===== Info list ===== */
        .info-list-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1.25rem;
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-lg);
            margin-bottom: 0.85rem;
            transition: all var(--transition-fast);
        }

        .info-list-item:hover {
            border-color: var(--brand-300);
            background: var(--brand-50);
            box-shadow: var(--shadow-card);
        }

        .info-list-item .item-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .info-list-item .item-content {
            flex: 1;
            min-width: 0;
        }

        .info-list-item .item-title {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--ink-900);
            margin-bottom: 0.25rem;
        }

        .info-list-item .item-meta {
            font-size: 0.8rem;
            color: var(--ink-500);
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            align-items: center;
        }

        .info-list-item .item-desc {
            font-size: 0.88rem;
            color: var(--ink-600);
            line-height: 1.6;
            margin-top: 0.4rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--ink-200);
            border-radius: var(--radius-lg);
            padding: 1.25rem 1.5rem;
            margin-bottom: 0.85rem;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--brand-300);
            background: var(--brand-50);
        }

        .faq-question {
            font-size: 1rem;
            font-weight: 600;
            color: var(--ink-900);
            margin-bottom: 0.4rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .faq-question i {
            color: var(--brand-600);
            font-size: 0.9rem;
        }

        .faq-answer {
            font-size: 0.92rem;
            color: var(--ink-600);
            line-height: 1.7;
            padding-left: 1.6rem;
        }

        /* ===== CTA ===== */
        .cta-panel {
            background: linear-gradient(135deg, var(--brand-700), var(--brand-900));
            border-radius: var(--radius-2xl);
            padding: 2.5rem 1.5rem;
            color: #ffffff;
            box-shadow: 0 20px 50px rgba(30,58,138,0.3);
            text-align: center;
        }

        @media (min-width: 768px) {
            .cta-panel {
                padding: 3.5rem 3rem;
            }
        }

        .cta-panel h2 {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.015em;
            margin-bottom: 0.85rem;
            color: #ffffff;
        }

        @media (min-width: 768px) {
            .cta-panel h2 {
                font-size: 2.2rem;
            }
        }

        .cta-panel p {
            font-size: 1rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 1.75rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--ink-900);
            color: rgba(255,255,255,0.78);
            padding-top: 3.5rem;
            padding-bottom: 1.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.12);
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 3rem;
            }
        }

        .footer-brand h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.75;
            color: rgba(255,255,255,0.68);
            max-width: 420px;
        }

        .footer-col h4 {
            font-size: 0.92rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 1rem;
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .footer-col ul li a {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.68);
            transition: color var(--transition-fast);
        }

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

        .footer-col ul li a i {
            font-size: 0.7rem;
            color: var(--brand-400);
        }

        .footer-bottom {
            padding-top: 1.5rem;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.82rem;
            color: rgba(255,255,255,0.55);
        }

        /* ===== Responsive fine-tuning ===== */
        @media (max-width: 640px) {
            .category-hero h1 {
                font-size: 1.9rem;
            }
            .hero-metrics {
                gap: 1rem 1.5rem;
            }
            .hero-metric .metric-value {
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.45rem;
            }
            .btn-primary-hero,
            .btn-ghost-hero {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: article */
:root {
            --brand-50: #eff6ff;
            --brand-100: #dbeafe;
            --brand-200: #bfdbfe;
            --brand-300: #93c5fd;
            --brand-400: #60a5fa;
            --brand-500: #3b82f6;
            --brand-600: #2563eb;
            --brand-700: #1d4ed8;
            --brand-800: #1e40af;
            --brand-900: #1e3a8a;
            --ink-50: #f8fafc;
            --ink-100: #f1f5f9;
            --ink-200: #e2e8f0;
            --ink-300: #cbd5e1;
            --ink-400: #94a3b8;
            --ink-500: #64748b;
            --ink-600: #475569;
            --ink-700: #334155;
            --ink-800: #1e293b;
            --ink-900: #0f172a;
            --success: #16a34a;
            --warning: #f59e0b;
            --danger: #ef4444;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --radius-2xl: 1.5rem;
            --shadow-card: 0 1px 3px rgba(15,23,42,0.06), 0 8px 24px rgba(15,23,42,0.06);
            --shadow-card-hover: 0 4px 10px rgba(15,23,42,0.08), 0 16px 40px rgba(15,23,42,0.12);
            --shadow-nav: 0 1px 0 rgba(15,23,42,0.06), 0 4px 16px rgba(15,23,42,0.04);
            --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
            --transition-base: 250ms cubic-bezier(0.4,0,0.2,1);
            --transition-slow: 350ms cubic-bezier(0.4,0,0.2,1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'Inter','PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
            line-height: 1.6;
            color: var(--ink-800);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        button, input, select, textarea {
            font: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            background: none;
            border: none;
        }
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--ink-200);
            box-shadow: var(--shadow-nav);
        }
        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            min-height: 68px;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--ink-900);
            flex-shrink: 0;
            letter-spacing: -0.01em;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-400));
            color: #ffffff;
            font-size: 0.95rem;
            box-shadow: 0 4px 12px rgba(37,99,235,0.25);
        }
        .desktop-nav {
            display: none;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--ink-600);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--brand-700);
            background: var(--brand-50);
        }
        .nav-link.active {
            color: var(--brand-700);
            background: var(--brand-100);
            font-weight: 600;
        }
        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
            background: linear-gradient(135deg, #fef3c7, #fde68a);
            color: #92400e;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .header-cta {
            display: none;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.25rem;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            font-size: 0.88rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 14px rgba(37,99,235,0.28);
            white-space: nowrap;
        }
        .header-cta:hover {
            background: linear-gradient(135deg, var(--brand-700), var(--brand-600));
            box-shadow: 0 6px 18px rgba(37,99,235,0.35);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            color: var(--ink-700);
            font-size: 1.15rem;
            transition: background var(--transition-fast);
        }
        .mobile-toggle:hover {
            background: var(--ink-100);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 0.75rem 1.5rem 1.25rem;
            background: rgba(255,255,255,0.98);
            border-top: 1px solid var(--ink-200);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0.5rem;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--ink-700);
            transition: all var(--transition-fast);
        }
        .mobile-nav-link:hover {
            color: var(--brand-700);
            background: var(--brand-50);
        }
        .mobile-nav-link.active {
            color: var(--brand-700);
            background: var(--brand-100);
            font-weight: 600;
        }
        .mobile-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            margin-top: 0.75rem;
            padding: 0.7rem 1rem;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37,99,235,0.28);
        }
        @media (min-width: 768px) {
            .desktop-nav {
                display: flex;
            }
            .header-cta {
                display: inline-flex;
            }
            .mobile-toggle {
                display: none;
            }
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 3.5rem 0 2.5rem;
            background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37,99,235,0.08), transparent 70%);
            pointer-events: none;
        }
        .article-hero-grid {
            position: relative;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            align-items: center;
        }
        @media (min-width: 960px) {
            .article-hero-grid {
                grid-template-columns: 1.1fr 0.9fr;
                gap: 3rem;
            }
        }
        .article-hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1.1rem;
        }
        .article-hero-badges .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            background: var(--brand-50);
            color: var(--brand-700);
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            border: 1px solid var(--brand-200);
        }
        .article-hero-badges .badge.badge-warm {
            background: #fef3c7;
            color: #92400e;
            border-color: #fde68a;
        }
        .article-hero h1 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--ink-900);
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        @media (min-width: 640px) {
            .article-hero h1 {
                font-size: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .article-hero h1 {
                font-size: 2.35rem;
            }
        }
        .article-hero-summary {
            font-size: 1rem;
            color: var(--ink-600);
            line-height: 1.7;
            margin-bottom: 1.4rem;
            max-width: 640px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .benefit-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-bottom: 1.4rem;
        }
        .benefit-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.4rem 0.8rem;
            border-radius: 8px;
            background: var(--ink-50);
            border: 1px solid var(--ink-200);
            color: var(--ink-700);
            font-size: 0.8rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .benefit-item i {
            color: var(--brand-600);
            font-size: 0.7rem;
        }
        .benefit-item:hover {
            border-color: var(--brand-300);
            background: var(--brand-50);
        }
        .eligibility-note {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            padding: 0.85rem 1rem;
            border-radius: 10px;
            background: var(--ink-50);
            border: 1px dashed var(--ink-300);
            margin-bottom: 1.5rem;
            font-size: 0.85rem;
            color: var(--ink-600);
        }
        .eligibility-note i {
            color: var(--brand-600);
            margin-top: 2px;
        }
        .article-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #ffffff;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all var(--transition-base);
            box-shadow: 0 4px 14px rgba(37,99,235,0.28);
            border: none;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--brand-700), var(--brand-600));
            box-shadow: 0 6px 20px rgba(37,99,235,0.38);
            transform: translateY(-2px);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--brand-300);
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            border-radius: 10px;
            background: #ffffff;
            color: var(--ink-700);
            font-size: 0.9rem;
            font-weight: 600;
            border: 1px solid var(--ink-300);
            transition: all var(--transition-base);
        }
        .btn-secondary:hover {
            border-color: var(--brand-400);
            color: var(--brand-700);
            background: var(--brand-50);
            transform: translateY(-1px);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid var(--brand-200);
            outline-offset: 2px;
        }
        .article-hero-visual {
            position: relative;
        }
        .article-hero-visual .visual-frame {
            border-radius: var(--radius-2xl);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            border: 1px solid var(--ink-200);
            background: #fff;
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .article-hero-visual .visual-frame:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 20px rgba(15,23,42,0.12), 0 24px 60px rgba(15,23,42,0.18);
        }
        .article-hero-visual .visual-frame img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
        }
        @media (min-width: 640px) {
            .article-hero-visual .visual-frame img {
                height: 320px;
            }
        }
        @media (min-width: 960px) {
            .article-hero-visual .visual-frame img {
                height: 380px;
            }
        }
        .visual-caption {
            padding: 0.9rem 1.1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.82rem;
            color: var(--ink-600);
            background: #fff;
            border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
        }
        .visual-caption i {
            color: var(--brand-600);
        }
        .visual-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            flex-shrink: 0;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
        }

        /* ===== Article Meta Bar ===== */
        .article-meta-bar {
            padding: 1.2rem 0;
            border-bottom: 1px solid var(--ink-200);
            background: #fff;
        }
        .article-meta-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.75rem 1.5rem;
            font-size: 0.82rem;
            color: var(--ink-500);
        }
        .article-meta-inner .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-meta-inner .meta-item i {
            color: var(--brand-600);
            font-size: 0.75rem;
        }

        /* ===== Article Content ===== */
        .article-content-section {
            padding: 2.5rem 0 2rem;
            background: #fff;
        }
        .article-content-body {
            max-width: 780px;
            margin: 0 auto;
            font-size: 1rem;
            color: var(--ink-700);
            line-height: 1.85;
        }
        .article-content-body h2 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--ink-900);
            margin: 1.8rem 0 0.8rem;
            letter-spacing: -0.01em;
        }
        .article-content-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--ink-900);
            margin: 1.5rem 0 0.6rem;
        }
        .article-content-body p {
            margin-bottom: 1rem;
        }
        .article-content-body img {
            border-radius: var(--radius-lg);
            margin: 1.2rem 0;
            box-shadow: var(--shadow-card);
        }
        .article-content-body a {
            color: var(--brand-600);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content-body a:hover {
            color: var(--brand-700);
        }
        .article-content-body ul,
        .article-content-body ol {
            margin: 0.8rem 0 1rem 1.4rem;
        }
        .article-content-body ul {
            list-style: disc;
        }
        .article-content-body ol {
            list-style: decimal;
        }
        .article-content-body li {
            margin-bottom: 0.35rem;
        }
        .article-content-body blockquote {
            border-left: 3px solid var(--brand-500);
            background: var(--brand-50);
            padding: 0.8rem 1.2rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 1.2rem 0;
            color: var(--ink-600);
            font-size: 0.95rem;
        }
        .article-content-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0;
            font-size: 0.9rem;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .article-content-body table th {
            background: var(--brand-600);
            color: #fff;
            font-weight: 600;
            padding: 0.7rem 1rem;
            text-align: left;
            font-size: 0.85rem;
        }
        .article-content-body table td {
            padding: 0.7rem 1rem;
            border-bottom: 1px solid var(--ink-200);
            color: var(--ink-600);
        }
        .article-content-body table tr:last-child td {
            border-bottom: none;
        }
        .article-content-body table tr:hover td {
            background: var(--ink-50);
        }
        .not-found-box {
            max-width: 640px;
            margin: 2rem auto;
            padding: 3rem 2rem;
            border-radius: var(--radius-xl);
            background: var(--ink-50);
            border: 1px solid var(--ink-200);
            text-align: center;
        }
        .not-found-box .nf-icon {
            font-size: 2.5rem;
            color: var(--ink-400);
            margin-bottom: 1rem;
        }
        .not-found-box h2 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--ink-800);
            margin-bottom: 0.5rem;
        }
        .not-found-box p {
            color: var(--ink-500);
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
        }

        /* ===== Screenshot Gallery ===== */
        .gallery-section {
            padding: 3rem 0;
            background: var(--ink-50);
        }
        .section-head {
            margin-bottom: 1.8rem;
        }
        .section-head .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--brand-700);
            background: var(--brand-100);
            padding: 0.25rem 0.7rem;
            border-radius: 999px;
            letter-spacing: 0.03em;
            margin-bottom: 0.6rem;
        }
        .section-head h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--ink-900);
            letter-spacing: -0.01em;
        }
        .section-head p {
            color: var(--ink-500);
            font-size: 0.9rem;
            margin-top: 0.35rem;
        }
        .gallery-scroll {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }
        @media (min-width: 640px) {
            .gallery-scroll {
                grid-template-columns: repeat(3, 1fr);
                gap: 1.2rem;
            }
        }
        @media (min-width: 1024px) {
            .gallery-scroll {
                grid-template-columns: repeat(4, 1fr);
                gap: 1.5rem;
            }
        }
        .gallery-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--ink-200);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            cursor: pointer;
        }
        .gallery-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--brand-300);
        }
        .gallery-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        @media (min-width: 640px) {
            .gallery-card img {
                height: 180px;
            }
        }
        .gallery-card:hover img {
            transform: scale(1.05);
        }
        .gallery-card .gallery-label {
            padding: 0.7rem 0.85rem;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--ink-600);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .gallery-card .gallery-label i {
            color: var(--brand-600);
            font-size: 0.65rem;
        }

        /* ===== Specs Table ===== */
        .specs-section {
            padding: 3rem 0;
            background: #fff;
        }
        .specs-panel {
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--ink-200);
            box-shadow: var(--shadow-card);
            background: #fff;
        }
        .specs-panel .specs-header {
            padding: 1.2rem 1.5rem;
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .specs-panel .specs-header i {
            font-size: 1.1rem;
        }
        .specs-panel .specs-header h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 0;
        }
        .specs-grid {
            display: grid;
            grid-template-columns: 1fr;
        }
        @media (min-width: 640px) {
            .specs-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .spec-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.85rem 1.5rem;
            border-bottom: 1px solid var(--ink-100);
            font-size: 0.88rem;
            transition: background var(--transition-fast);
        }
        .spec-item:hover {
            background: var(--ink-50);
        }
        .spec-item:nth-last-child(-n+2) {
            border-bottom: none;
        }
        .spec-item .spec-label {
            color: var(--ink-500);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .spec-item .spec-label i {
            color: var(--brand-600);
            width: 16px;
            text-align: center;
        }
        .spec-item .spec-value {
            font-weight: 600;
            color: var(--ink-800);
            text-align: right;
        }

        /* ===== Quick Answers ===== */
        .quick-section {
            padding: 3rem 0;
            background: var(--ink-50);
        }
        .quick-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0.8rem;
        }
        @media (min-width: 768px) {
            .quick-list {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
        }
        .quick-item {
            display: flex;
            gap: 0.85rem;
            padding: 1rem 1.2rem;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--ink-200);
            box-shadow: 0 1px 2px rgba(15,23,42,0.03);
            transition: all var(--transition-base);
        }
        .quick-item:hover {
            border-color: var(--brand-300);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .quick-item .quick-icon {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-50);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            font-size: 0.9rem;
        }
        .quick-item .quick-body h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--ink-800);
            margin-bottom: 0.15rem;
        }
        .quick-item .quick-body p {
            font-size: 0.82rem;
            color: var(--ink-500);
            line-height: 1.5;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 3rem 0;
            background: #fff;
        }
        .related-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1rem;
        }
        @media (min-width: 640px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.2rem;
            }
        }
        @media (min-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 1.5rem;
            }
        }
        .related-card {
            display: block;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--ink-200);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--brand-300);
        }
        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        @media (min-width: 640px) {
            .related-card img {
                height: 170px;
            }
        }
        .related-card .related-body {
            padding: 0.9rem 1.1rem;
        }
        .related-card .related-body h3 {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--ink-800);
            margin-bottom: 0.3rem;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .related-body p {
            font-size: 0.78rem;
            color: var(--ink-500);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 3rem 0;
            background: var(--ink-50);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }
        .faq-item {
            border-radius: var(--radius-md);
            background: #fff;
            border: 1px solid var(--ink-200);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--brand-300);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.3rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--ink-800);
            user-select: none;
        }
        .faq-question .faq-toggle {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--brand-50);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-toggle {
            transform: rotate(180deg);
            background: var(--brand-600);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 1.3rem;
            color: var(--ink-600);
            font-size: 0.85rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.3rem 1rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 3.5rem 0;
            background: #fff;
        }
        .cta-banner {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
            padding: 2.5rem 1.8rem;
            box-shadow: 0 8px 30px rgba(37,99,235,0.25);
        }
        @media (min-width: 768px) {
            .cta-banner {
                padding: 3rem 3.5rem;
            }
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            pointer-events: none;
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -30px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            pointer-events: none;
        }
        .cta-banner-content {
            position: relative;
            z-index: 1;
            max-width: 620px;
        }
        .cta-banner-content h2 {
            color: #fff;
            font-size: 1.4rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 0.5rem;
        }
        @media (min-width: 768px) {
            .cta-banner-content h2 {
                font-size: 1.7rem;
            }
        }
        .cta-banner-content p {
            color: rgba(255,255,255,0.85);
            font-size: 0.9rem;
            line-height: 1.65;
            margin-bottom: 1.5rem;
        }
        .cta-banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            border-radius: 10px;
            background: #fff;
            color: var(--brand-700);
            font-size: 0.9rem;
            font-weight: 600;
            transition: all var(--transition-base);
            box-shadow: 0 4px 14px rgba(0,0,0,0.1);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.16);
            color: var(--brand-800);
        }
        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.5rem;
            border-radius: 10px;
            background: transparent;
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            border: 1px solid rgba(255,255,255,0.5);
            transition: all var(--transition-base);
        }
        .btn-outline-white:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.8);
            transform: translateY(-1px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--ink-900);
            color: var(--ink-300);
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 3rem;
            }
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.7rem;
            letter-spacing: -0.01em;
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: var(--ink-400);
            max-width: 380px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.92rem;
            font-weight: 600;
            margin-bottom: 0.85rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--ink-400);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-col ul li a i {
            font-size: 0.6rem;
            color: var(--brand-500);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.78rem;
            color: var(--ink-500);
            letter-spacing: 0.02em;
        }