/* roulang page: index */
:root {
            --primary: #1a56db;
            --primary-dark: #1e40af;
            --primary-light: #3b82f6;
            --primary-glow: #60a5fa;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fbbf24;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-elevated: #1e293b;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --text-white: #f1f5f9;
            --text-white-muted: #cbd5e1;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --success: #10b981;
            --success-light: #d1fae5;
            --danger: #ef4444;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-2xl: 24px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 20px rgba(0,0,0,0.07);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.09);
            --shadow-lg: 0 12px 44px rgba(0,0,0,0.11);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.14);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --header-height: 72px;
            --bottom-tab-height: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-tap-highlight-color: transparent;
        }

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

        @media (max-width: 639px) {
            body {
                padding-bottom: var(--bottom-tab-height);
            }
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input {
            font-family: inherit;
        }
        h1, h2, h3, h4, h5, h6 {
            margin: 0 0 0.5em;
            line-height: 1.3;
            color: var(--text);
            font-weight: 700;
        }
        h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
        h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
        h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }
        h4 { font-size: 1.1rem; }
        p { margin: 0 0 1em; }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 639px) {
            .container, .container-narrow {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        .section {
            padding: 72px 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        .section-lg {
            padding: 96px 0;
        }
        @media (max-width: 639px) {
            .section { padding: 48px 0; }
            .section-sm { padding: 32px 0; }
            .section-lg { padding: 60px 0; }
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: rgba(26,86,219,0.08);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.35em;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 620px;
            margin: 0 auto 40px;
            line-height: 1.6;
        }
        .text-center { text-align: center; }

        /* ========== HEADER / NAV ========== */
        .site-header {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (max-width: 639px) {
            .header-inner {
                padding: 0 16px;
            }
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text);
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .logo-link:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text);
            text-decoration: none;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(26,86,219,0.05);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(26,86,219,0.07);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 24px;
            font-weight: 700;
            font-size: 0.9rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            text-decoration: none;
            transition: all var(--transition);
            box-shadow: 0 2px 12px rgba(26,86,219,0.3);
            white-space: nowrap;
        }
        .nav-cta:hover {
            color: #fff;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            box-shadow: 0 4px 20px rgba(26,86,219,0.4);
            transform: translateY(-1px);
        }
        @media (max-width: 639px) {
            .nav-desktop {
                display: none;
            }
            .site-header {
                height: 56px;
            }
            .logo-link {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
        }
        @media (min-width: 640px) {
            .nav-desktop {
                display: flex;
            }
        }

        /* ========== MOBILE BOTTOM TAB NAV ========== */
        .bottom-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            height: var(--bottom-tab-height);
            padding: 0 8px;
            padding-bottom: env(safe-area-inset-bottom, 0);
        }
        @media (max-width: 639px) {
            .bottom-tab-nav {
                display: flex;
                align-items: center;
                justify-content: space-around;
            }
        }
        .bottom-tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            flex: 1;
            height: 100%;
            text-decoration: none;
            color: var(--text-lighter);
            font-size: 0.7rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            position: relative;
            border-radius: var(--radius-sm);
            padding: 4px 2px;
            -webkit-tap-highlight-color: transparent;
        }
        .bottom-tab-item i {
            font-size: 1.25rem;
            transition: all var(--transition-fast);
        }
        .bottom-tab-item.active {
            color: var(--primary);
        }
        .bottom-tab-item.active::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 3px;
            background: var(--primary);
            border-radius: 0 0 3px 3px;
        }
        .bottom-tab-item.bottom-tab-cta {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 28px;
            margin: 8px 4px;
            height: auto;
            padding: 10px 14px;
            flex: 1.3;
            box-shadow: 0 4px 16px rgba(26,86,219,0.35);
            font-size: 0.75rem;
            gap: 2px;
        }
        .bottom-tab-item.bottom-tab-cta i {
            color: #fff;
            font-size: 1.1rem;
        }
        .bottom-tab-item.bottom-tab-cta.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
        }
        .bottom-tab-item.bottom-tab-cta.active::before {
            display: none;
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(160deg, #0f172a 0%, #1e3a5f 35%, #1a3a6b 65%, #0f172a 100%);
            overflow: hidden;
            color: var(--text-white);
        }
        .hero-bg-img {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26,86,219,0.25) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 30%, rgba(245,158,11,0.12) 0%, transparent 50%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            max-width: 750px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 30px;
            padding: 8px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            background: var(--success);
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.6); }
        }
        .hero-title {
            font-size: clamp(2rem, 5.5vw, 3.2rem);
            font-weight: 900;
            color: #fff;
            margin-bottom: 0.3em;
            letter-spacing: -0.02em;
            line-height: 1.15;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-white-muted);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: #1e293b;
            box-shadow: 0 4px 18px rgba(245,158,11,0.4);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            color: #1e293b;
            box-shadow: 0 6px 24px rgba(245,158,11,0.5);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.35);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: rgba(255,255,255,0.6);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-md {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .btn-sm {
            padding: 7px 16px;
            font-size: 0.82rem;
            border-radius: 20px;
        }
        @media (max-width: 639px) {
            .hero-section {
                padding: 60px 0 56px;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.88rem;
            }
        }

        /* ========== FEATURES ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 16px;
        }
        @media (max-width: 1023px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 639px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(26,86,219,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--primary);
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon-wrap {
            background: var(--primary);
            color: #fff;
            transform: scale(1.08);
        }
        .feature-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.4em;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin: 0;
            line-height: 1.55;
        }

        /* ========== CATEGORY ENTRY ========== */
        .category-entry-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: #fff;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        @media (max-width: 767px) {
            .category-entry-block {
                grid-template-columns: 1fr;
                gap: 0;
            }
        }
        .category-entry-img {
            width: 100%;
            height: 100%;
            min-height: 280px;
            object-fit: cover;
            display: block;
        }
        @media (max-width: 767px) {
            .category-entry-img {
                min-height: 200px;
                max-height: 240px;
            }
        }
        .category-entry-body {
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        @media (max-width: 639px) {
            .category-entry-body {
                padding: 24px 18px;
            }
        }
        .category-entry-body .section-label {
            align-self: flex-start;
        }
        .category-entry-body h2 {
            font-size: 1.5rem;
            margin-bottom: 0.4em;
        }
        .category-entry-body p {
            color: var(--text-light);
            margin-bottom: 20px;
            line-height: 1.6;
        }

        /* ========== CMS LIST ========== */
        .cms-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 16px;
        }
        @media (max-width: 1023px) {
            .cms-list-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 639px) {
            .cms-list-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }
        .cms-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .cms-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .cms-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        @media (max-width: 639px) {
            .cms-card-img {
                height: 200px;
            }
        }
        .cms-card-body {
            padding: 20px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .cms-card-meta {
            display: flex;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-lighter);
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .cms-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .cms-card-tag {
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--primary);
            background: rgba(26,86,219,0.07);
            padding: 3px 10px;
            border-radius: 12px;
            white-space: nowrap;
        }
        .cms-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-card-title a {
            color: inherit;
            text-decoration: none;
        }
        .cms-card-title a:hover {
            color: var(--primary);
        }
        .cms-card-excerpt {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.55;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .cms-card-link {
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .cms-card-link:hover {
            gap: 8px;
            color: var(--primary-dark);
        }
        .cms-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-light);
            font-size: 0.95rem;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 2px dashed var(--border);
        }

        /* ========== STATS ========== */
        .stats-section {
            background: var(--bg-dark);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(26,86,219,0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 767px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }
        .stat-item {
            text-align: center;
            padding: 24px 16px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255,255,255,0.08);
        }
        .stat-number {
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 900;
            color: var(--accent-light);
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-white-muted);
            font-weight: 500;
        }

        /* ========== STEPS ========== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 16px;
        }
        @media (max-width: 1023px) {
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 639px) {
            .steps-list {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }
        .step-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: #fff;
            padding: 24px 20px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-weight: 900;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .step-body h4 {
            margin-bottom: 4px;
            font-size: 1rem;
        }
        .step-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin: 0;
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 16px auto 0;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            margin-bottom: 10px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--text);
            background: transparent;
            border: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: color var(--transition-fast);
            line-height: 1.4;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-lighter);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.65;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(160deg, #1e3a5f 0%, #1a3a6b 40%, #0f172a 100%);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(26,86,219,0.2) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
        }
        .cta-content h2 {
            color: #fff;
            font-size: clamp(1.5rem, 3vw, 2rem);
        }
        .cta-content p {
            color: var(--text-white-muted);
            font-size: 1.02rem;
            margin-bottom: 28px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-white-muted);
            padding: 48px 0 32px;
            font-size: 0.9rem;
        }
        @media (max-width: 639px) {
            .site-footer {
                padding: 36px 0 24px;
                padding-bottom: calc(24px + var(--bottom-tab-height));
            }
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        @media (max-width: 767px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }
        .footer-brand-name {
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 0.85rem;
            line-height: 1.6;
            max-width: 300px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 7px;
        }
        .footer-col ul li a {
            color: var(--text-white-muted);
            text-decoration: none;
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
        }
        @media (max-width: 480px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== UTILS ========== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            white-space: nowrap;
            border: 0;
        }
        @media (max-width: 639px) {
            .hide-on-mobile {
                display: none !important;
            }
        }
        @media (min-width: 640px) {
            .show-on-mobile {
                display: none !important;
            }
        }

        /* Foundation overrides */
        .row {
            max-width: 1200px;
        }
        .button {
            font-family: var(--font-sans);
        }

/* roulang page: article */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --accent: #10b981;
            --accent-light: #34d399;
            --gold: #f59e0b;
            --gold-light: #fbbf24;
            --bg: #f1f5f9;
            --surface: #ffffff;
            --surface-alt: #f8fafc;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
            --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.1);
            --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
            --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
            --bottom-tab-height: 60px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            padding-bottom: 0;
        }

        @media (max-width: 768px) {
            body {
                padding-bottom: var(--bottom-tab-height);
            }
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== HEADER ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.01em;
            transition: opacity var(--transition);
        }

        .logo-link:hover {
            opacity: 0.85;
            color: var(--primary-dark);
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 2px 8px rgba(30, 64, 175, 0.3);
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 64, 175, 0.04);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(30, 64, 175, 0.07);
        }

        .nav-cta {
            margin-left: 8px;
            padding: 10px 20px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            box-shadow: 0 4px 14px rgba(30, 64, 175, 0.35);
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-cta:hover {
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(30, 64, 175, 0.45);
        }

        @media (max-width: 768px) {
            .nav-desktop {
                gap: 2px;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 0.85rem;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 0.85rem;
                margin-left: 2px;
            }
            .logo-link {
                font-size: 1rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 480px) {
            .nav-link {
                padding: 5px 8px;
                font-size: 0.8rem;
            }
            .nav-cta {
                padding: 7px 10px;
                font-size: 0.8rem;
            }
            .logo-link span:last-child {
                display: none;
            }
        }

        /* ========== BOTTOM TAB NAV (MOBILE) ========== */
        .bottom-tab-nav {
            display: none;
        }

        @media (max-width: 768px) {
            .bottom-tab-nav {
                display: flex;
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                z-index: 200;
                background: rgba(255, 255, 255, 0.96);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-top: 1px solid var(--border);
                height: var(--bottom-tab-height);
                box-shadow: 0 -2px 16px rgba(15, 23, 42, 0.08);
                align-items: center;
                justify-content: space-around;
            }
            .bottom-tab-item {
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 4px;
                flex: 1;
                height: 100%;
                color: var(--text-muted);
                font-size: 0.7rem;
                font-weight: 500;
                transition: all var(--transition);
                position: relative;
                -webkit-tap-highlight-color: transparent;
            }
            .bottom-tab-item i {
                font-size: 1.25rem;
                transition: all var(--transition);
            }
            .bottom-tab-item.active {
                color: var(--primary);
            }
            .bottom-tab-item.active i {
                color: var(--primary);
            }
            .bottom-tab-item.active::after {
                content: '';
                position: absolute;
                top: 0;
                left: 50%;
                transform: translateX(-50%);
                width: 28px;
                height: 3px;
                background: var(--primary);
                border-radius: 0 0 4px 4px;
            }
            .bottom-tab-item:active {
                opacity: 0.7;
            }
        }

        /* ========== ARTICLE BANNER ========== */
        .article-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 40%, #1e40af 100%);
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.65);
            z-index: 1;
        }

        .article-banner .banner-overlay-pattern {
            position: absolute;
            inset: 0;
            z-index: 2;
            background:
                radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 30%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
        }

        .article-banner-content {
            position: relative;
            z-index: 3;
            width: 100%;
            padding: 48px 0;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 16px;
        }

        .article-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition);
        }

        .article-breadcrumb a:hover {
            color: #fff;
        }

        .article-breadcrumb .separator {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.7rem;
        }

        .article-breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        .article-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin: 0 0 16px;
            letter-spacing: -0.02em;
        }

        .article-meta-row {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.8);
        }

        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta-item i {
            font-size: 0.85rem;
            opacity: 0.8;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 5px 14px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        @media (max-width: 768px) {
            .article-banner {
                min-height: 240px;
            }
            .article-banner-content {
                padding: 32px 0;
            }
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-meta-row {
                gap: 10px;
                font-size: 0.8rem;
            }
        }

        /* ========== ARTICLE CONTENT SECTION ========== */
        .article-main-section {
            padding: 48px 0 56px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }

        @media (max-width: 960px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        .article-body-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }

        .article-body-card .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }

        .article-body-card .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 32px 0 14px;
            color: var(--primary-dark);
        }

        .article-body-card .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 24px 0 10px;
            color: var(--text);
        }

        .article-body-card .article-content p {
            margin: 0 0 16px;
        }

        .article-body-card .article-content img {
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-body-card .article-content ul,
        .article-body-card .article-content ol {
            margin: 12px 0 20px;
            padding-left: 24px;
        }

        .article-body-card .article-content li {
            margin-bottom: 8px;
        }

        .article-body-card .article-content blockquote {
            border-left: 4px solid var(--primary-light);
            background: var(--surface-alt);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-not-found {
            text-align: center;
            padding: 80px 40px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }

        .article-not-found .nf-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1rem;
        }

        /* ========== SIDEBAR ========== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        @media (max-width: 960px) {
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 600px) {
            .article-sidebar {
                grid-template-columns: 1fr;
            }
        }

        .sidebar-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }

        .sidebar-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h4 i {
            color: var(--primary);
            font-size: 0.95rem;
        }

        .sidebar-rel-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
            align-items: flex-start;
        }

        .sidebar-rel-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-rel-item:first-child {
            padding-top: 0;
        }

        .sidebar-rel-item:hover {
            opacity: 0.8;
        }

        .sidebar-rel-thumb {
            width: 72px;
            height: 56px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg);
        }

        .sidebar-rel-info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-rel-info .rel-title {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 4px;
        }

        .sidebar-rel-info .rel-date {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-tag {
            padding: 5px 12px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            background: var(--bg);
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .sidebar-tag:hover {
            background: rgba(30, 64, 175, 0.1);
            color: var(--primary);
        }

        /* ========== RELATED SECTION ========== */
        .related-section {
            padding: 0 0 56px;
        }

        .related-section .section-label {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .related-section .section-label i {
            color: var(--primary);
        }

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

        @media (max-width: 960px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 600px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        .rel-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

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

        .rel-card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg);
        }

        .rel-card-body {
            padding: 20px;
        }

        .rel-card-body .rel-card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }

        .rel-card-body .rel-card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .rel-card-body .rel-card-date {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 56px 0 64px;
        }

        .cta-block {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1e40af 100%);
            border-radius: var(--radius-xl);
            padding: 52px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 30% 20%, rgba(59, 130, 246, 0.3) 0%, transparent 55%),
                radial-gradient(ellipse at 70% 70%, rgba(16, 185, 129, 0.2) 0%, transparent 50%);
        }

        .cta-block>* {
            position: relative;
            z-index: 2;
        }

        .cta-block h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin: 0 0 12px;
            letter-spacing: -0.02em;
        }

        .cta-block p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 auto 28px;
            max-width: 560px;
            line-height: 1.6;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            box-shadow: 0 6px 22px rgba(16, 185, 129, 0.4);
            transition: all var(--transition);
            border: none;
        }

        .cta-btn:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(16, 185, 129, 0.5);
        }

        @media (max-width: 640px) {
            .cta-block {
                padding: 36px 24px;
                border-radius: var(--radius-lg);
            }
            .cta-block h3 {
                font-size: 1.35rem;
            }
            .cta-block p {
                font-size: 0.95rem;
            }
            .cta-btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.6;
            color: #94a3b8;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.02em;
        }

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

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

        .footer-col ul li a {
            font-size: 0.88rem;
            color: #94a3b8;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.82rem;
            color: #64748b;
        }

        @media (max-width: 520px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
            .site-footer {
                padding: 36px 0 20px;
            }
        }

        /* ========== UTILITY ========== */
        .text-center {
            text-align: center;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }

/* roulang page: category1 */
:root {
            --primary: #1a6fb5;
            --primary-dark: #14578c;
            --primary-light: #e8f4fc;
            --accent: #0ea87a;
            --accent-light: #e6f7f1;
            --bg: #f8fafb;
            --surface: #ffffff;
            --text: #1e2a36;
            --text-secondary: #5c6b7a;
            --text-muted: #8a96a3;
            --border: #e2e8f0;
            --border-light: #edf2f7;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.09), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.11), 0 8px 20px rgba(0,0,0,0.06);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.22s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
        }

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

        html { scroll-behavior: smooth; font-size: 16px; }

        body {
            font-family: var(--font-sans);
            line-height: 1.65;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-bottom: 0;
        }

        @media (max-width: 767px) {
            body { padding-bottom: 70px; }
        }

        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; }
        ul, ol { list-style: none; }

        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        @media (max-width: 640px) { .container { padding: 0 16px; } }

        /* ========== HEADER ========== */
        .site-header {
            position: sticky; top: 0; z-index: 1000;
            background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
        }
        .header-inner {
            max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        @media (max-width: 640px) { .header-inner { padding: 0 16px; } }

        .logo-link {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.25rem; font-weight: 700; color: var(--text);
            text-decoration: none; white-space: nowrap;
            transition: opacity var(--transition);
        }
        .logo-link:hover { opacity: 0.82; color: var(--text); }
        .logo-icon {
            display: flex; align-items: center; justify-content: center;
            width: 40px; height: 40px; border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), #2089d0);
            color: #fff; font-size: 1.1rem;
            box-shadow: 0 2px 8px rgba(26,111,181,0.25);
        }

        .nav-desktop { display: flex; align-items: center; gap: 8px; }
        .nav-desktop .nav-link {
            padding: 8px 16px; border-radius: var(--radius-sm);
            font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
            text-decoration: none; transition: all var(--transition);
            position: relative;
        }
        .nav-desktop .nav-link:hover { color: var(--primary); background: var(--primary-light); }
        .nav-desktop .nav-link.active {
            color: var(--primary); font-weight: 600;
            background: var(--primary-light);
        }
        .nav-desktop .nav-cta {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 9px 20px; border-radius: 25px;
            font-size: 0.9rem; font-weight: 600; color: #fff;
            background: var(--accent);
            text-decoration: none;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(14,168,122,0.25);
            margin-left: 6px;
        }
        .nav-desktop .nav-cta:hover { background: #0b8c63; color: #fff; box-shadow: 0 4px 14px rgba(14,168,122,0.35); transform: translateY(-1px); }

        @media (max-width: 767px) {
            .nav-desktop { display: none; }
        }

        /* ========== MOBILE BOTTOM TAB NAV ========== */
        .mobile-bottom-nav {
            display: none;
            position: fixed; bottom: 0; left: 0; right: 0; z-index: 1001;
            background: rgba(255,255,255,0.94); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-light);
            box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
            padding: 6px 0 env(safe-area-inset-bottom, 6px) 0;
        }
        @media (max-width: 767px) {
            .mobile-bottom-nav { display: flex; }
        }
        .mobile-bottom-nav-inner {
            display: flex; justify-content: space-around; align-items: center;
            width: 100%; max-width: 500px; margin: 0 auto;
        }
        .mobile-tab {
            display: flex; flex-direction: column; align-items: center; gap: 3px;
            padding: 6px 12px; border-radius: 10px;
            font-size: 0.7rem; font-weight: 500; color: var(--text-muted);
            text-decoration: none; transition: all var(--transition);
            min-width: 56px;
        }
        .mobile-tab i { font-size: 1.25rem; transition: color var(--transition); }
        .mobile-tab.active { color: var(--primary); font-weight: 600; }
        .mobile-tab.active i { color: var(--primary); }
        .mobile-tab:hover { color: var(--primary); }
        .mobile-tab:active { transform: scale(0.94); }

        /* ========== CATEGORY BANNER ========== */
        .category-banner {
            position: relative;
            background: linear-gradient(160deg, #1a3c54 0%, #1a5370 40%, #1a6fb5 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover; background-position: center;
            padding: 64px 0 56px;
            color: #fff;
            overflow: hidden;
        }
        .category-banner::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(180deg, rgba(26,60,84,0.82) 0%, rgba(26,80,110,0.78) 100%);
            z-index: 0;
        }
        .category-banner .container { position: relative; z-index: 1; }
        .breadcrumb {
            display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
            font-size: 0.88rem; color: rgba(255,255,255,0.75);
            margin-bottom: 18px;
        }
        .breadcrumb a { color: rgba(255,255,255,0.85); text-decoration: none; transition: color var(--transition); }
        .breadcrumb a:hover { color: #fff; }
        .breadcrumb .sep { color: rgba(255,255,255,0.45); font-size: 0.7rem; }
        .breadcrumb .current { color: #fff; font-weight: 500; }
        .category-banner h1 {
            font-size: 2.4rem; font-weight: 700; letter-spacing: -0.02em;
            margin-bottom: 10px; line-height: 1.25;
        }
        .category-banner .banner-subtitle {
            font-size: 1.08rem; color: rgba(255,255,255,0.82);
            max-width: 600px; line-height: 1.6;
        }
        .category-banner .banner-stats {
            display: flex; gap: 28px; margin-top: 22px; flex-wrap: wrap;
        }
        .banner-stat-item { display: flex; align-items: center; gap: 7px; font-size: 0.92rem; color: rgba(255,255,255,0.85); }
        .banner-stat-item i { color: #5cc9a0; font-size: 0.85rem; }
        .banner-stat-item strong { color: #fff; font-weight: 700; }
        @media (max-width: 767px) {
            .category-banner { padding: 44px 0 36px; }
            .category-banner h1 { font-size: 1.65rem; }
            .category-banner .banner-subtitle { font-size: 0.95rem; }
            .banner-stats { gap: 16px; }
        }

        /* ========== MAIN LAYOUT ========== */
        .category-main { padding: 48px 0 60px; }
        @media (max-width: 767px) { .category-main { padding: 32px 0 40px; } }

        .category-layout { display: grid; grid-template-columns: 1fr 320px; gap: 36px; align-items: start; }
        @media (max-width: 1023px) {
            .category-layout { grid-template-columns: 1fr; gap: 28px; }
        }

        /* ========== TOOLBAR ========== */
        .toolbar {
            display: flex; align-items: center; justify-content: space-between;
            flex-wrap: wrap; gap: 14px;
            padding: 16px 20px; background: var(--surface);
            border-radius: var(--radius-md); border: 1px solid var(--border);
            box-shadow: var(--shadow-sm); margin-bottom: 28px;
        }
        .toolbar-title { font-weight: 600; font-size: 1.05rem; color: var(--text); }
        .toolbar-sort { display: flex; gap: 6px; flex-wrap: wrap; }
        .sort-btn {
            padding: 7px 14px; border-radius: 20px; font-size: 0.85rem; font-weight: 500;
            border: 1px solid var(--border); background: var(--surface); color: var(--text-secondary);
            cursor: pointer; transition: all var(--transition); white-space: nowrap;
        }
        .sort-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
        .sort-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }
        @media (max-width: 640px) {
            .toolbar { flex-direction: column; align-items: flex-start; }
            .toolbar-sort { width: 100%; }
            .sort-btn { flex: 1; text-align: center; }
        }

        /* ========== ARTICLE CARDS ========== */
        .articles-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
        @media (max-width: 767px) { .articles-grid { grid-template-columns: 1fr; gap: 16px; } }

        .article-card {
            background: var(--surface); border-radius: var(--radius-md);
            border: 1px solid var(--border); overflow: hidden;
            box-shadow: var(--shadow-sm); transition: all var(--transition);
            display: flex; flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg); transform: translateY(-3px);
            border-color: #c8dae8;
        }
        .article-card .card-img-wrap {
            position: relative; overflow: hidden; aspect-ratio: 16/9; background: #eef3f7;
        }
        .article-card .card-img-wrap img {
            width: 100%; height: 100%; object-fit: cover;
            transition: transform 0.45s cubic-bezier(0.4,0,0.2,1);
        }
        .article-card:hover .card-img-wrap img { transform: scale(1.04); }
        .article-card .card-tag {
            position: absolute; top: 12px; left: 12px;
            padding: 5px 11px; border-radius: 14px;
            font-size: 0.75rem; font-weight: 600; color: #fff;
            background: var(--accent); z-index: 2;
            box-shadow: 0 2px 6px rgba(0,0,0,0.15);
        }
        .article-card .card-body { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
        .article-card .card-title {
            font-size: 1.05rem; font-weight: 650; line-height: 1.4;
            margin-bottom: 8px; color: var(--text);
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .article-card .card-title a { color: var(--text); text-decoration: none; transition: color var(--transition); }
        .article-card .card-title a:hover { color: var(--primary); }
        .article-card .card-excerpt {
            font-size: 0.88rem; color: var(--text-secondary); line-height: 1.55;
            margin-bottom: 14px; flex: 1;
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .article-card .card-meta {
            display: flex; align-items: center; gap: 16px;
            font-size: 0.8rem; color: var(--text-muted);
            padding-top: 12px; border-top: 1px solid var(--border-light);
        }
        .article-card .card-meta i { margin-right: 3px; font-size: 0.75rem; }
        .article-card .card-read-more {
            display: inline-flex; align-items: center; gap: 4px;
            font-size: 0.85rem; font-weight: 600; color: var(--primary);
            margin-top: 4px; transition: gap var(--transition);
        }
        .article-card .card-read-more:hover { gap: 8px; color: var(--primary-dark); }

        /* ========== SIDEBAR ========== */
        .sidebar { display: flex; flex-direction: column; gap: 24px; }
        @media (max-width: 1023px) {
            .sidebar { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
        }
        @media (max-width: 640px) {
            .sidebar { grid-template-columns: 1fr; }
        }
        .sidebar-widget {
            background: var(--surface); border-radius: var(--radius-md);
            border: 1px solid var(--border); padding: 22px 20px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-widget h4 {
            font-size: 1rem; font-weight: 650; color: var(--text);
            margin-bottom: 14px; padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
            display: flex; align-items: center; gap: 8px;
        }
        .sidebar-widget h4 i { color: var(--primary); font-size: 0.9rem; }
        .hot-list { display: flex; flex-direction: column; gap: 12px; }
        .hot-item { display: flex; gap: 10px; align-items: flex-start; }
        .hot-item .hot-rank {
            flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%;
            background: #eef3f7; color: var(--text-secondary);
            font-size: 0.78rem; font-weight: 700;
            display: flex; align-items: center; justify-content: center;
        }
        .hot-item:nth-child(1) .hot-rank { background: #ffe0b0; color: #c4780a; }
        .hot-item:nth-child(2) .hot-rank { background: #dce8f2; color: #3a6d94; }
        .hot-item:nth-child(3) .hot-rank { background: #f0e4d8; color: #8c5e2f; }
        .hot-item .hot-info { flex: 1; min-width: 0; }
        .hot-item .hot-title {
            font-size: 0.88rem; font-weight: 500; color: var(--text);
            line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .hot-item .hot-title a { color: var(--text); text-decoration: none; transition: color var(--transition); }
        .hot-item .hot-title a:hover { color: var(--primary); }
        .hot-item .hot-date { font-size: 0.75rem; color: var(--text-muted); margin-top: 3px; }
        .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
        .tag-pill {
            padding: 6px 14px; border-radius: 18px; font-size: 0.8rem; font-weight: 500;
            background: var(--bg); color: var(--text-secondary); border: 1px solid var(--border);
            text-decoration: none; transition: all var(--transition);
        }
        .tag-pill:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }

        /* ========== PAGINATION ========== */
        .pagination-wrap { display: flex; justify-content: center; margin-top: 36px; }
        .pagination-list { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: center; }
        .page-btn {
            width: 38px; height: 38px; border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
            background: var(--surface); border: 1px solid var(--border);
            cursor: pointer; text-decoration: none; transition: all var(--transition);
        }
        .page-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
        .page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 700; }
        .page-btn:disabled, .page-btn.disabled { opacity: 0.4; pointer-events: none; }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(150deg, #1a5370 0%, #1a6fb5 50%, #1870b8 100%);
            border-radius: var(--radius-lg); padding: 44px 36px; margin-top: 48px;
            text-align: center; color: #fff; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; top: -60px; right: -40px;
            width: 180px; height: 180px; border-radius: 50%;
            background: rgba(255,255,255,0.06); pointer-events: none;
        }
        .cta-section::after {
            content: ''; position: absolute; bottom: -50px; left: -30px;
            width: 140px; height: 140px; border-radius: 50%;
            background: rgba(255,255,255,0.05); pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 1; max-width: 700px; }
        .cta-section h3 { font-size: 1.55rem; font-weight: 700; margin-bottom: 10px; }
        .cta-section p { font-size: 1rem; color: rgba(255,255,255,0.85); margin-bottom: 22px; line-height: 1.6; }
        .cta-btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 13px 32px; border-radius: 28px; font-size: 1rem; font-weight: 600;
            background: #fff; color: var(--primary); text-decoration: none;
            transition: all var(--transition); box-shadow: 0 6px 20px rgba(0,0,0,0.18);
        }
        .cta-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,0,0,0.24); color: var(--primary-dark); }
        @media (max-width: 640px) {
            .cta-section { padding: 32px 20px; margin-top: 32px; border-radius: var(--radius-md); }
            .cta-section h3 { font-size: 1.3rem; }
        }

        /* ========== FAQ MINI ========== */
        .faq-mini-section { margin-top: 44px; }
        .faq-mini-section .section-heading {
            display: flex; align-items: center; gap: 10px; margin-bottom: 20px;
        }
        .section-heading h2 { font-size: 1.4rem; font-weight: 700; color: var(--text); }
        .section-heading .heading-line { flex: 1; height: 1px; background: var(--border); }
        .faq-mini-list { display: flex; flex-direction: column; gap: 10px; }
        .faq-mini-item {
            background: var(--surface); border: 1px solid var(--border);
            border-radius: var(--radius-sm); overflow: hidden;
            transition: all var(--transition);
        }
        .faq-mini-item:hover { border-color: #c0d4e4; }
        .faq-mini-q {
            padding: 16px 20px; cursor: pointer; font-weight: 600; font-size: 0.95rem;
            color: var(--text); display: flex; align-items: center; justify-content: space-between;
            gap: 12px; user-select: none;
        }
        .faq-mini-q i { color: var(--text-muted); transition: transform var(--transition); font-size: 0.8rem; }
        .faq-mini-q:hover { color: var(--primary); }
        .faq-mini-a {
            padding: 0 20px 16px; font-size: 0.88rem; color: var(--text-secondary);
            line-height: 1.6; display: none;
        }
        .faq-mini-item.open .faq-mini-a { display: block; }
        .faq-mini-item.open .faq-mini-q i { transform: rotate(180deg); color: var(--primary); }
        .faq-mini-item.open { border-color: var(--primary); box-shadow: var(--shadow-sm); }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #1a2632; color: #c0ccd6; padding: 48px 0 28px;
            margin-top: 56px; border-top: 4px solid var(--primary);
        }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 36px; margin-bottom: 32px; }
        @media (max-width: 767px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }
        .footer-brand-name { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 10px; }
        .footer-desc { font-size: 0.88rem; line-height: 1.6; color: #9aa8b4; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 650; color: #e8edf2; margin-bottom: 12px; }
        .footer-col ul { display: flex; flex-direction: column; gap: 8px; }
        .footer-col ul li a { color: #9aa8b4; font-size: 0.88rem; text-decoration: none; transition: color var(--transition); }
        .footer-col ul li a:hover { color: #fff; }
        .footer-bottom {
            display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px;
            padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.8rem; color: #7a8a96;
        }
        @media (max-width: 640px) { .footer-bottom { flex-direction: column; text-align: center; } }

        /* ========== Foundation Overrides ========== */
        .foundation-override-button, button:not(.sort-btn):not(.page-btn):not(.cta-btn) {
            border-radius: var(--radius-sm) !important; font-weight: 600 !important;
        }
        .foundation-override-card { border-radius: var(--radius-md) !important; }

        /* ========== UTILITY ========== */
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        @media (min-width: 768px) { .hide-desktop { display: none !important; } }
        @media (max-width: 767px) { .hide-mobile { display: none !important; } }