/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #60a5fa;
            --secondary: #0f172a;
            --secondary-light: #1e293b;
            --accent: #06b6d4;
            --accent-light: #22d3ee;
            --bg: #f8fafc;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 40px rgba(37, 99, 235, 0.12);
        }

        *,
        *::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', 'Helvetica Neue', Arial, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
            outline: none;
        }

        .container-full {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

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

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

        /* ===== Header/Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(15, 23, 42, 0.06);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 1rem;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--secondary);
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #2563eb, #06b6d4);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .nav-link {
            padding: 0.55rem 1rem;
            border-radius: 0.65rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--muted);
            transition: all 0.2s ease;
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 99px;
            background: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 0;
            padding: 0;
            border: 1px solid transparent;
            border-radius: 99px;
            background: rgba(241, 245, 249, 0.8);
            font-size: 0.88rem;
            transition: all 0.35s ease;
            opacity: 0;
        }

        .nav-search input.open {
            width: 190px;
            padding: 0.45rem 2.3rem 0.45rem 1rem;
            border-color: var(--border);
            opacity: 1;
        }

        .nav-search input:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .nav-search-btn {
            padding: 0.4rem 0.7rem;
            border-radius: 99px;
            color: var(--muted);
            font-size: 0.9rem;
            transition: all 0.2s ease;
        }

        .nav-search-btn:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        .nav-login-btn {
            padding: 0.45rem 1.1rem;
            border-radius: 0.6rem;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            border: 1px solid var(--border);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-login-btn:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: rgba(37, 99, 235, 0.03);
        }

        .nav-cta {
            padding: 0.5rem 1.3rem;
            border-radius: 0.6rem;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-mobile-toggle {
            display: none;
            padding: 0.5rem;
            border-radius: 0.5rem;
            color: var(--text);
            font-size: 1.3rem;
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 1rem 1.25rem 1.25rem;
        }

        .mobile-menu a {
            display: block;
            padding: 0.7rem 0.5rem;
            border-radius: 0.5rem;
            font-weight: 500;
            color: var(--text);
        }

        .mobile-menu a.active {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-login-btn {
                display: none;
            }
            .nav-mobile-toggle {
                display: block;
            }
            .mobile-menu.open {
                display: block;
            }
        }

        @media (max-width: 480px) {
            .nav-cta {
                padding: 0.4rem 0.9rem;
                font-size: 0.82rem;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo-icon {
                width: 34px;
                height: 34px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg,
                    rgba(15, 23, 42, 0.88) 0%,
                    rgba(15, 23, 42, 0.72) 40%,
                    rgba(15, 23, 42, 0.45) 70%,
                    rgba(15, 23, 42, 0.25) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 660px;
            padding: 4rem 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            padding: 0.35rem 1rem;
            border-radius: 99px;
            color: #e0f2fe;
            font-size: 0.82rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            letter-spacing: 0.02em;
        }

        .hero-badge i {
            color: var(--accent-light);
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 1.2rem;
            letter-spacing: -0.02em;
        }

        .hero-title span {
            background: linear-gradient(120deg, #60a5fa, #22d3ee);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.08rem;
            line-height: 1.7;
            color: rgba(226, 232, 240, 0.85);
            margin-bottom: 2rem;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            border-radius: 0.75rem;
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(37, 99, 235, 0.5);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            border-radius: 0.75rem;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            color: #fff;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(6px);
        }

        .btn-outline-light:hover {
            border-color: rgba(255, 255, 255, 0.7);
            background: rgba(255, 255, 255, 0.12);
        }

        .hero-meta {
            margin-top: 2.2rem;
            display: flex;
            align-items: center;
            gap: 1.5rem;
            color: rgba(226, 232, 240, 0.6);
            font-size: 0.85rem;
            flex-wrap: wrap;
        }

        .hero-meta i {
            color: var(--accent-light);
            margin-right: 0.3rem;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 480px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 0.98rem;
            }
            .hero-content {
                padding: 3rem 0;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-outline-light {
                justify-content: center;
            }
        }

        /* ===== Stats ===== */
        .stats-section {
            background: #fff;
            border-bottom: 1px solid var(--border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            padding: 2.5rem 0;
        }

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

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-number span {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-left: 2px;
        }

        .stat-label {
            margin-top: 0.35rem;
            font-size: 0.88rem;
            color: var(--muted);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
                padding: 2rem 0;
            }
            .stat-number {
                font-size: 1.6rem;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 5rem 0;
        }

        .section-sm {
            padding: 3.5rem 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 0.3rem 0.9rem;
            border-radius: 99px;
            letter-spacing: 0.03em;
            margin-bottom: 1rem;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 0.8rem;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--muted);
            max-width: 680px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 3.5rem 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        /* ===== Core Service Cards ===== */
        .core-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(226, 232, 240, 0.6);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .core-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, #2563eb, #06b6d4);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

        .core-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .core-card:hover::before {
            transform: scaleX(1);
        }

        .core-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
            color: var(--primary);
        }

        .core-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.6rem;
        }

        .core-card p {
            font-size: 0.92rem;
            color: var(--muted);
            line-height: 1.65;
            margin-bottom: 1rem;
        }

        .core-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: gap 0.2s ease;
        }

        .core-link:hover {
            gap: 0.55rem;
        }

        /* ===== Category Cards ===== */
        .cat-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.35s ease;
            height: 320px;
            display: flex;
            align-items: flex-end;
        }

        .cat-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .cat-card:hover img {
            transform: scale(1.06);
        }

        .cat-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(15, 23, 42, 0) 35%,
                    rgba(15, 23, 42, 0.55) 70%,
                    rgba(15, 23, 42, 0.85) 100%);
            transition: background 0.3s ease;
        }

        .cat-card:hover .cat-card-overlay {
            background: linear-gradient(180deg,
                    rgba(15, 23, 42, 0.05) 25%,
                    rgba(15, 23, 42, 0.6) 65%,
                    rgba(15, 23, 42, 0.9) 100%);
        }

        .cat-card-content {
            position: relative;
            z-index: 2;
            padding: 1.8rem 1.5rem;
            width: 100%;
        }

        .cat-card-content h3 {
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }

        .cat-card-content p {
            color: rgba(226, 232, 240, 0.85);
            font-size: 0.88rem;
            line-height: 1.55;
            margin-bottom: 0.8rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .cat-card-link {
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            opacity: 0.85;
            transition: all 0.2s ease;
        }

        .cat-card-link:hover {
            opacity: 1;
            gap: 0.55rem;
        }

        /* ===== Advantage Cards ===== */
        .adv-card {
            background: #fff;
            border-radius: 1.1rem;
            padding: 1.8rem 1.4rem;
            border: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .adv-card:hover {
            box-shadow: var(--shadow);
            border-color: rgba(37, 99, 235, 0.15);
            transform: translateY(-4px);
        }

        .adv-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 1rem;
            background: var(--primary);
            color: #fff;
        }

        .adv-card:nth-child(2) .adv-icon {
            background: #0ea5e9;
        }
        .adv-card:nth-child(3) .adv-icon {
            background: #06b6d4;
        }
        .adv-card:nth-child(4) .adv-icon {
            background: #8b5cf6;
        }

        .adv-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.45rem;
        }

        .adv-card p {
            font-size: 0.88rem;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ===== News List ===== */
        .news-section {
            background: #fff;
        }

        .news-card {
            display: flex;
            align-items: flex-start;
            gap: 1.2rem;
            padding: 1.5rem 1.2rem;
            border-radius: 1rem;
            border: 1px solid rgba(226, 232, 240, 0.6);
            margin-bottom: 0.8rem;
            transition: all 0.25s ease;
            background: #fff;
        }

        .news-card:hover {
            box-shadow: var(--shadow);
            border-color: rgba(37, 99, 235, 0.2);
            transform: translateX(4px);
        }

        .news-badge {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.7rem;
            border-radius: 99px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            white-space: nowrap;
        }

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

        .news-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 0.3rem;
            line-height: 1.4;
            transition: color 0.2s;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card:hover .news-title {
            color: var(--primary);
        }

        .news-desc {
            font-size: 0.87rem;
            color: var(--muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.3rem;
        }

        .news-meta {
            font-size: 0.78rem;
            color: #94a3b8;
        }

        .news-empty {
            text-align: center;
            padding: 3rem 1rem;
            color: var(--muted);
            border: 1px dashed var(--border);
            border-radius: 1rem;
            background: #f8fafc;
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--secondary);
            color: #fff;
        }

        .process-section .section-title {
            color: #fff;
        }

        .process-section .section-desc {
            color: rgba(226, 232, 240, 0.75);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 2.5rem;
        }

        .process-step {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 1.25rem;
            padding: 2rem 1.3rem;
            text-align: center;
            position: relative;
            transition: all 0.3s ease;
            backdrop-filter: blur(8px);
        }

        .process-step:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(96, 165, 250, 0.3);
            transform: translateY(-4px);
        }

        .step-num {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, #2563eb, #06b6d4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
            margin: 0 auto 1rem;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }

        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: #f1f5f9;
        }

        .process-step p {
            font-size: 0.85rem;
            color: rgba(226, 232, 240, 0.7);
            line-height: 1.55;
        }

        @media (max-width: 768px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 1rem;
            margin-bottom: 0.8rem;
            overflow: hidden;
            transition: all 0.25s ease;
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.4rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--secondary);
            text-align: left;
            transition: color 0.2s;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            transition: all 0.3s ease;
        }

        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 1.4rem 1.2rem;
            color: var(--muted);
            font-size: 0.93rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.3), transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.2), transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 4.5rem 1rem;
        }

        .cta-content h2 {
            color: #fff;
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .cta-content p {
            color: rgba(226, 232, 240, 0.8);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        @media (max-width: 480px) {
            .cta-content h2 {
                font-size: 1.7rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: stretch;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0b1220;
            color: #94a3b8;
            padding-top: 4rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 3rem;
        }

        .footer-brand {
            max-width: 320px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: #f1f5f9;
            margin-bottom: 1rem;
        }

        .footer-logo i {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, #2563eb, #06b6d4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: #fff;
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: #64748b;
            margin-bottom: 1.2rem;
        }

        .footer-social {
            display: flex;
            gap: 0.6rem;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            font-size: 0.9rem;
            transition: all 0.25s ease;
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #f1f5f9;
            margin-bottom: 1.2rem;
        }

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

        .footer-links li {
            margin-bottom: 0.6rem;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: #64748b;
            transition: all 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.88rem;
            color: #64748b;
            margin-bottom: 0.7rem;
        }

        .footer-contact i {
            width: 20px;
            text-align: center;
            color: var(--primary-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 1.5rem 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
        }

        .footer-copy {
            font-size: 0.82rem;
            color: #475569;
        }

        .footer-copy a {
            color: #64748b;
        }

        .footer-copy a:hover {
            color: #94a3b8;
        }

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

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Focus accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Reveal animation ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
:root {
        --primary: #0d2a4e;
        --primary-dark: #081d36;
        --primary-light: #1a3a6b;
        --accent: #f59e0b;
        --accent-dark: #d97706;
        --accent-light: #fbbf24;
        --surface: #ffffff;
        --bg: #f8fafc;
        --bg-alt: #f1f5f9;
        --text: #1e293b;
        --text-light: #64748b;
        --text-lighter: #94a3b8;
        --border: #e2e8f0;
        --radius-sm: 8px;
        --radius: 16px;
        --radius-lg: 24px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
        --shadow: 0 4px 20px rgba(0,0,0,0.06);
        --shadow-lg: 0 12px 32px rgba(0,0,0,0.09);
        --container: 1280px;
        --transition: all .25s ease;
    }
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: var(--transition);
    }
    img {
        max-width: 100%;
        display: block;
    }
    button, input, select, textarea {
        font-family: inherit;
        font-size: inherit;
    }
    .container {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }
    .container-full {
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Header / Nav ===== */
    .site-header {
        background: #fff;
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 100;
        box-shadow: var(--shadow-sm);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 16px;
    }
    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
        font-weight: 800;
        color: var(--primary);
        font-size: 1.35rem;
        letter-spacing: .5px;
    }
    .brand i {
        font-size: 1.6rem;
        color: var(--accent);
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .nav-link {
        display: inline-block;
        padding: 8px 14px;
        border-radius: 999px;
        font-size: .95rem;
        font-weight: 500;
        color: var(--text-light);
        transition: var(--transition);
    }
    .nav-link:hover {
        color: var(--primary);
        background: var(--bg-alt);
    }
    .nav-link.active {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 12px rgba(13,42,78,.2);
    }
    .header-actions {
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .header-search {
        position: relative;
        display: flex;
        align-items: center;
    }
    .header-search input {
        width: 180px;
        border: 1px solid var(--border);
        border-radius: 999px;
        padding: 8px 14px 8px 36px;
        font-size: .875rem;
        background: var(--bg-alt);
        outline: none;
        transition: var(--transition);
    }
    .header-search input:focus {
        border-color: var(--accent);
        background: #fff;
        box-shadow: 0 0 0 3px rgba(245,158,11,.12);
        width: 220px;
    }
    .header-search i {
        position: absolute;
        left: 14px;
        color: var(--text-lighter);
        font-size: .875rem;
        pointer-events: none;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        border-radius: 999px;
        padding: 9px 20px;
        font-weight: 600;
        font-size: .9rem;
        border: none;
        cursor: pointer;
        transition: var(--transition);
    }
    .btn-outline {
        border: 1px solid var(--border);
        color: var(--primary);
        background: #fff;
    }
    .btn-outline:hover {
        border-color: var(--primary);
        box-shadow: var(--shadow-sm);
        transform: translateY(-1px);
    }
    .btn-accent {
        background: var(--accent);
        color: #fff;
        box-shadow: 0 4px 14px rgba(245,158,11,.3);
    }
    .btn-accent:hover {
        background: var(--accent-dark);
        box-shadow: 0 6px 20px rgba(217,119,6,.35);
        transform: translateY(-2px);
    }
    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 14px rgba(13,42,78,.25);
    }
    .btn-primary:hover {
        background: var(--primary-light);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(13,42,78,.3);
    }
    .btn-lg {
        padding: 14px 32px;
        font-size: 1rem;
    }
    .burger {
        display: none;
        background: none;
        border: none;
        font-size: 1.4rem;
        color: var(--primary);
        cursor: pointer;
        padding: 6px;
    }

    /* ===== Page Banner ===== */
    .page-banner {
        background: linear-gradient(135deg, rgba(13,42,78,.92), rgba(26,58,107,.82)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        padding: 64px 0;
        color: #fff;
        position: relative;
    }
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: .875rem;
        color: rgba(255,255,255,.7);
        margin-bottom: 14px;
        flex-wrap: wrap;
    }
    .breadcrumb a:hover {
        color: var(--accent-light);
    }
    .breadcrumb .sep {
        opacity: .5;
    }

    /* ===== Article Layout ===== */
    .article-section {
        padding: 60px 0;
    }
    .article-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .article-card {
        background: var(--surface);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow);
        overflow: hidden;
        padding: 32px;
        border: 1px solid var(--border);
    }
    .article-cat-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(245,158,11,.1);
        color: var(--accent-dark);
        border-radius: 999px;
        padding: 5px 14px;
        font-size: .8rem;
        font-weight: 600;
        letter-spacing: .5px;
    }
    .article-date {
        color: var(--text-lighter);
        font-size: .9rem;
    }
    .article-card h1 {
        font-size: 2rem;
        line-height: 1.35;
        color: var(--text);
        margin: 16px 0 12px;
        font-weight: 800;
    }
    .article-meta {
        display: flex;
        align-items: center;
        gap: 14px;
        flex-wrap: wrap;
        padding-bottom: 20px;
        border-bottom: 1px solid var(--border);
        margin-bottom: 24px;
    }
    .article-cover {
        border-radius: var(--radius);
        overflow: hidden;
        margin-bottom: 28px;
    }
    .article-cover img {
        width: 100%;
        max-height: 460px;
        object-fit: cover;
    }
    .article-content {
        font-size: 1.05rem;
        line-height: 1.9;
        color: #334155;
    }
    .article-content::first-letter {
        font-size: 1.1em;
    }
    .article-content p {
        margin-bottom: 1.2em;
    }
    .article-content h2, .article-content h3 {
        color: var(--text);
        margin: 1.6em 0 .7em;
        font-weight: 700;
    }
    .article-content ul, .article-content ol {
        padding-left: 1.4em;
        margin-bottom: 1.2em;
    }
    .article-content blockquote {
        border-left: 4px solid var(--accent);
        background: #fffbeb;
        padding: 14px 20px;
        border-radius: 0 var(--radius) var(--radius) 0;
        margin-bottom: 1.2em;
        color: var(--text-light);
    }
    .not-found-box {
        text-align: center;
        padding: 48px 24px;
    }
    .not-found-box i {
        font-size: 3rem;
        color: var(--text-lighter);
        margin-bottom: 16px;
        opacity: .5;
    }
    .not-found-box h2 {
        font-size: 1.4rem;
        margin-bottom: 8px;
    }
    .not-found-box p {
        color: var(--text-light);
        margin-bottom: 20px;
    }

    /* ===== Sidebar ===== */
    .sidebar-col {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }
    .sidebar-card {
        background: var(--surface);
        border-radius: var(--radius);
        box-shadow: var(--shadow-sm);
        padding: 24px;
        border: 1px solid var(--border);
    }
    .sidebar-title {
        font-size: 1rem;
        font-weight: 700;
        color: var(--text);
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .sidebar-title i {
        color: var(--accent);
        font-size: .95rem;
    }
    .sidebar-about {
        text-align: center;
        padding: 28px 20px;
    }
    .sidebar-about .logo-wrap {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 56px;
        height: 56px;
        background: var(--primary);
        color: #fff;
        border-radius: 16px;
        font-size: 1.5rem;
        margin-bottom: 14px;
        box-shadow: 0 4px 14px rgba(13,42,78,.2);
    }
    .sidebar-about h3 {
        font-weight: 700;
        font-size: 1.05rem;
        margin-bottom: 8px;
    }
    .sidebar-about p {
        font-size: .875rem;
        color: var(--text-light);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .sidebar-cats {
        list-style: none;
        padding: 0;
    }
    .sidebar-cats li {
        margin-bottom: 6px;
    }
    .sidebar-cats a {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 10px 14px;
        border-radius: var(--radius-sm);
        color: var(--text-light);
        font-size: .925rem;
        transition: var(--transition);
        background: var(--bg);
        border: 1px solid transparent;
    }
    .sidebar-cats a:hover {
        background: #fff;
        border-color: var(--border);
        color: var(--primary);
        box-shadow: var(--shadow-sm);
        transform: translateX(3px);
    }
    .sidebar-cats a i {
        color: var(--accent);
        font-size: .9rem;
        width: 20px;
        text-align: center;
    }
    .contact-card {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
        color: #fff;
        border: none;
        position: relative;
        overflow: hidden;
    }
    .contact-card::after {
        content: '';
        position: absolute;
        top: -40px;
        right: -30px;
        width: 120px;
        height: 120px;
        background: rgba(255,255,255,.05);
        border-radius: 50%;
    }
    .contact-card h3 {
        color: #fff;
        margin-bottom: 6px;
    }
    .contact-card p {
        color: rgba(255,255,255,.7);
        font-size: .875rem;
        margin-bottom: 16px;
    }
    .contact-card .btn {
        width: 100%;
        background: var(--accent);
        color: #fff;
    }
    .contact-card .btn:hover {
        background: var(--accent-dark);
    }

    /* ===== Related ===== */
    .related-section {
        background: var(--bg);
        padding: 60px 0;
        border-top: 1px solid var(--border);
    }
    .section-head {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 16px;
        margin-bottom: 28px;
    }
    .section-head h2 {
        font-size: 1.6rem;
        font-weight: 800;
        color: var(--text);
        position: relative;
        padding-left: 16px;
    }
    .section-head h2::before {
        content: '';
        position: absolute;
        left: 0;
        top: 4px;
        bottom: 4px;
        width: 4px;
        background: var(--accent);
        border-radius: 4px;
    }
    .section-head p {
        color: var(--text-lighter);
        font-size: .9rem;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .related-card {
        background: var(--surface);
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
    }
    .related-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    .related-card .cover {
        height: 180px;
        overflow: hidden;
        position: relative;
    }
    .related-card .cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
    }
    .related-card:hover .cover img {
        transform: scale(1.04);
    }
    .related-card .body {
        padding: 20px;
    }
    .related-card .body h3 {
        font-size: 1rem;
        font-weight: 700;
        margin-bottom: 6px;
        color: var(--text);
    }
    .related-card .body p {
        font-size: .85rem;
        color: var(--text-light);
        line-height: 1.6;
        margin-bottom: 12px;
    }
    .related-card .body .tag {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        background: var(--bg-alt);
        color: var(--primary);
        border-radius: 999px;
        padding: 4px 10px;
        font-size: .75rem;
        font-weight: 600;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
        padding: 64px 0;
        color: #fff;
        text-align: center;
    }
    .cta-section h2 {
        font-size: 1.8rem;
        font-weight: 800;
        margin-bottom: 10px;
    }
    .cta-section p {
        color: rgba(255,255,255,.75);
        margin-bottom: 28px;
        font-size: 1rem;
    }
    .cta-actions {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: #0a1628;
        color: #94a3b8;
        padding-top: 60px;
    }
    .site-footer .container-full {
        max-width: 1280px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255,255,255,.06);
    }
    .footer-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.2rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
    }
    .footer-logo i {
        color: var(--accent);
        font-size: 1.4rem;
    }
    .footer-brand p {
        font-size: .875rem;
        line-height: 1.8;
        margin-bottom: 20px;
        color: #64748b;
    }
    .footer-social {
        display: flex;
        gap: 10px;
    }
    .footer-social a {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        background: rgba(255,255,255,.06);
        color: #94a3b8;
        transition: var(--transition);
    }
    .footer-social a:hover {
        background: var(--accent);
        color: #fff;
        transform: translateY(-2px);
    }
    .footer-title {
        color: #fff;
        font-size: .95rem;
        font-weight: 700;
        margin-bottom: 16px;
    }
    .footer-links {
        list-style: none;
        padding: 0;
    }
    .footer-links li {
        margin-bottom: 8px;
    }
    .footer-links a {
        color: #64748b;
        font-size: .875rem;
        transition: var(--transition);
    }
    .footer-links a:hover {
        color: var(--accent);
        padding-left: 4px;
    }
    .footer-contact {
        list-style: none;
        padding: 0;
    }
    .footer-contact li {
        display: flex;
        align-items: center;
        gap: 10px;
        color: #64748b;
        font-size: .875rem;
        margin-bottom: 10px;
    }
    .footer-contact li i {
        color: var(--accent);
        width: 16px;
        text-align: center;
    }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 24px 0;
        flex-wrap: wrap;
        gap: 12px;
    }
    .footer-copy {
        color: #475569;
        font-size: .8rem;
    }
    .footer-copy a {
        color: #64748b;
    }
    .footer-copy a:hover {
        color: var(--accent);
    }

    /* ===== Responsive ===== */
    @media (min-width: 1025px) {
        .article-grid {
            grid-template-columns: 1fr 340px;
        }
    }
    @media (max-width: 1024px) {
        .nav-links {
            display: none;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            flex-direction: column;
            align-items: stretch;
            gap: 0;
            padding: 12px 24px;
            box-shadow: var(--shadow-lg);
            border-bottom: 1px solid var(--border);
        }
        .nav-links.open {
            display: flex;
        }
        .nav-link {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
        }
        .burger {
            display: block;
        }
        .header-search {
            display: none;
        }
        .related-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (max-width: 768px) {
        .site-footer .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .article-card {
            padding: 20px;
        }
        .article-card h1 {
            font-size: 1.5rem;
        }
        .related-grid {
            grid-template-columns: 1fr;
        }
        .header-inner {
            height: 60px;
        }
        .brand {
            font-size: 1.1rem;
        }
        .btn-start {
            padding: 8px 14px;
            font-size: .85rem;
        }
        .page-banner {
            padding: 40px 0;
        }
        .cta-actions .btn {
            width: 100%;
        }
        .footer-bottom {
            justify-content: center;
            text-align: center;
        }
    }
    @media (max-width: 520px) {
        .container, .container-full {
            padding: 0 16px;
        }
        .article-content {
            font-size: .975rem;
        }
        .section-head {
            flex-direction: column;
            align-items: flex-start;
        }
        .page-banner h1 {
            font-size: 1.4rem;
        }
    }

/* roulang page: category1 */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #f59e0b;
    --ink: #1e293b;
    --ink-soft: #475569;
    --ink-mute: #94a3b8;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    --border: #e2e8f0;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.75rem;
    --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
    --transition: all 0.3s 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: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--ink);
    background: #fff;
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

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

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

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

  .container-full {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ===== Header & Nav ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    height: 72px;
  }

  .site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .site-logo i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    color: #fff;
    border-radius: 12px;
    font-size: 18px;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
  }

  .site-logo span {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--ink);
  }

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

  .nav-link {
    padding: 8px 16px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--ink-soft);
    transition: var(--transition);
    white-space: nowrap;
  }

  .nav-link:hover {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.06);
  }

  .nav-link.active {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    font-weight: 600;
  }

  .nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }

  .nav-search {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 7px 16px;
    transition: var(--transition);
  }

  .nav-search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  }

  .nav-search i {
    color: var(--ink-mute);
    font-size: 14px;
  }

  .nav-search input {
    border: none;
    outline: none;
    background: transparent;
    width: 130px;
    font-size: 14px;
    color: var(--ink);
  }

  .nav-search input::placeholder {
    color: var(--ink-mute);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
  }

  .btn-ghost {
    background: transparent;
    color: var(--ink-soft);
    border: 1px solid var(--border);
  }

  .btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(37, 99, 235, 0.04);
  }

  .btn-accent {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
  }

  .btn-accent:hover {
    background: #d97706;
    transform: translateY(-2px);
  }

  .nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--ink);
    font-size: 18px;
    flex-shrink: 0;
  }

  /* ===== Hero ===== */
  .page-hero {
    position: relative;
    padding: 96px 0 88px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #1e40af 100%);
    overflow: hidden;
  }

  .page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.25;
  }

  .page-hero::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
    pointer-events: none;
  }

  .hero-inner {
    position: relative;
    z-index: 2;
    max-width: 820px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    padding: 6px 16px;
    color: #e2e8f0;
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(4px);
    margin-bottom: 24px;
  }

  .hero-badge i {
    color: #fbbf24;
  }

  .hero-title {
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 800;
    line-height: 1.2;
    color: #fff;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
  }

  .hero-title span {
    background: linear-gradient(135deg, #60a5fa, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-sub {
    font-size: clamp(15px, 2vw, 18px);
    color: #cbd5e1;
    line-height: 1.8;
    max-width: 640px;
    margin-bottom: 36px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
  }

  .hero-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 56px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
  }

  .hero-metric {
    text-align: left;
  }

  .hero-metric .num {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
  }

  .hero-metric .num strong {
    color: #fbbf24;
  }

  .hero-metric .label {
    font-size: 13px;
    color: #94a3b8;
    margin-top: 4px;
  }

  /* ===== Section ===== */
  .section {
    padding: 80px 0;
  }

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

  .section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 48px;
  }

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(37, 99, 235, 0.08);
    border-radius: 999px;
    padding: 6px 16px;
    margin-bottom: 16px;
  }

  .section-title {
    font-size: clamp(26px, 3.5vw, 38px);
    font-weight: 800;
    line-height: 1.3;
    color: var(--ink);
    letter-spacing: -0.02em;
    margin-bottom: 14px;
  }

  .section-desc {
    font-size: 16px;
    color: var(--ink-soft);
    line-height: 1.7;
  }

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

  .cat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.03);
  }

  .cat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card);
    border-color: rgba(37, 99, 235, 0.3);
  }

  .cat-card-img {
    height: 180px;
    overflow: hidden;
    position: relative;
  }

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

  .cat-card:hover .cat-card-img img {
    transform: scale(1.05);
  }

  .cat-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.35), transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
  }

  .cat-card:hover .cat-card-img::after {
    opacity: 1;
  }

  .cat-card-body {
    padding: 24px;
  }

  .cat-card-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .cat-card-body h3 i {
    color: var(--primary);
    font-size: 16px;
  }

  .cat-card-body p {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.6;
    margin-bottom: 14px;
  }

  .cat-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .tag {
    display: inline-block;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 3px 10px;
    font-size: 12px;
    color: var(--ink-soft);
    font-weight: 500;
    transition: var(--transition);
  }

  .cat-card:hover .tag {
    border-color: rgba(37, 99, 235, 0.2);
    color: var(--primary);
  }

  /* ===== Process ===== */
  .process-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    counter-reset: step;
  }

  .process-item {
    position: relative;
    text-align: center;
    padding: 32px 20px;
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    transition: var(--transition);
  }

  .process-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: rgba(37, 99, 235, 0.25);
  }

  .process-num {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    border-radius: 16px;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
  }

  .process-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 8px;
  }

  .process-item p {
    font-size: 13px;
    color: var(--ink-soft);
    line-height: 1.6;
  }

  .process-item::after {
    content: '';
    position: absolute;
    top: 43px;
    right: -12px;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, #2563eb, transparent);
    opacity: 0.5;
  }

  .process-item:last-child::after {
    display: none;
  }

  /* ===== Features ===== */
  .features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .feature-card {
    display: flex;
    gap: 20px;
    padding: 32px;
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    transition: var(--transition);
  }

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

  .feature-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
  }

  .feature-icon.amber {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.25);
  }

  .feature-icon.emerald {
    background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.25);
  }

  .feature-icon.violet {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.25);
  }

  .feature-body h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 8px;
  }

  .feature-body p {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.7;
  }

  /* ===== Table ===== */
  .table-wrap {
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-card);
  }

  .table-wrap table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
  }

  .table-wrap th {
    background: var(--bg-light);
    font-size: 13px;
    font-weight: 600;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
  }

  .table-wrap td {
    padding: 14px 20px;
    font-size: 14px;
    color: var(--ink);
    border-bottom: 1px solid #f1f5f9;
  }

  .table-wrap tr:last-child td {
    border-bottom: none;
  }

  .table-wrap tr:hover td {
    background: rgba(37, 99, 235, 0.02);
  }

  .status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
  }

  .status-badge.in-stock {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
  }

  .status-badge.limited {
    background: rgba(245, 158, 11, 0.1);
    color: #d97706;
  }

  .status-badge.order {
    background: rgba(100, 116, 139, 0.1);
    color: #64748b;
  }

  .btn-sm {
    padding: 6px 14px;
    font-size: 13px;
    border-radius: 8px;
  }

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

  .article-card {
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
  }

  .article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card);
  }

  .article-thumb {
    height: 180px;
    overflow: hidden;
    position: relative;
  }

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

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

  .article-thumb .cat-label {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 8px;
    z-index: 2;
  }

  .article-body {
    padding: 20px;
  }

  .article-body h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .article-body p {
    font-size: 13px;
    color: var(--ink-soft);
    line-height: 1.6;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--ink-mute);
  }

  .article-meta i {
    font-size: 12px;
  }

  .article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
  }

  /* ===== FAQ ===== */
  .faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
  }

  .faq-item:hover {
    border-color: rgba(37, 99, 235, 0.2);
    box-shadow: var(--shadow-card);
  }

  .faq-q {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
  }

  .faq-q i {
    color: var(--primary);
    font-size: 18px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
  }

  .faq-item.open .faq-q i {
    transform: rotate(45deg);
  }

  .faq-a {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
  }

  .faq-item.open .faq-a {
    padding: 0 24px 20px;
    max-height: 500px;
  }

  .faq-a p {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.7;
    border-top: 1px solid #f1f5f9;
    padding-top: 14px;
  }

  /* ===== CTA ===== */
  .cta-section {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    overflow: hidden;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.12;
  }

  .cta-inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
  }

  .cta-left h2 {
    font-size: clamp(26px, 3.5vw, 38px);
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
  }

  .cta-left p {
    font-size: 16px;
    color: #cbd5e1;
    line-height: 1.7;
    margin-bottom: 28px;
  }

  .cta-form {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-2xl);
    padding: 32px;
    backdrop-filter: blur(8px);
  }

  .cta-form h3 {
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
  }

  .cta-form p {
    color: #94a3b8;
    font-size: 14px;
    margin-bottom: 20px;
  }

  .form-group {
    margin-bottom: 14px;
  }

  .form-group input,
  .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    font-size: 14px;
    outline: none;
    transition: var(--transition);
  }

  .form-group input::placeholder,
  .form-group textarea::placeholder {
    color: #94a3b8;
  }

  .form-group input:focus,
  .form-group textarea:focus {
    border-color: rgba(96, 165, 250, 0.6);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15);
  }

  .form-group textarea {
    min-height: 80px;
    resize: vertical;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 64px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 48px;
  }

  .footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
  }

  .footer-logo i {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    color: #fff;
    border-radius: 10px;
    font-size: 16px;
  }

  .footer-logo span {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
  }

  .footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    max-width: 340px;
  }

  .footer-social {
    display: flex;
    gap: 10px;
  }

  .footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    color: #94a3b8;
    font-size: 15px;
    transition: var(--transition);
  }

  .footer-social a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
  }

  .footer-title {
    font-size: 16px;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 18px;
  }

  .footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-links a {
    font-size: 14px;
    color: #94a3b8;
    transition: var(--transition);
  }

  .footer-links a:hover {
    color: #60a5fa;
    padding-left: 4px;
  }

  .footer-contact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: #94a3b8;
  }

  .footer-contact li i {
    color: #60a5fa;
    margin-top: 3px;
    font-size: 13px;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
  }

  .footer-copy {
    font-size: 13px;
    color: #64748b;
  }

  .footer-copy a {
    color: #94a3b8;
    transition: var(--transition);
  }

  .footer-copy a:hover {
    color: #60a5fa;
  }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .nav-links {
      display: none;
      position: absolute;
      top: 72px;
      left: 0;
      right: 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
      flex-direction: column;
      align-items: stretch;
      padding: 16px 24px;
      gap: 4px;
      box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
    }

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

    .nav-link {
      padding: 12px 16px;
      border-radius: 10px;
    }

    .nav-search {
      display: none;
    }

    .nav-toggle {
      display: flex;
    }

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

    .process-grid {
      grid-template-columns: repeat(3, 1fr);
      row-gap: 20px;
    }

    .process-item::after {
      display: none;
    }

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

    .cta-inner {
      grid-template-columns: 1fr;
    }

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

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

  @media (max-width: 768px) {
    .section {
      padding: 56px 0;
    }

    .page-hero {
      padding: 64px 0 56px;
    }

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

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

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .hero-actions .btn {
      width: 100%;
    }

    .table-wrap {
      overflow-x: auto;
    }
  }

  @media (max-width: 520px) {
    .container-full {
      padding: 0 16px;
    }

    .header-inner {
      height: 64px;
    }

    .site-logo span {
      font-size: 18px;
    }

    .site-logo i {
      width: 36px;
      height: 36px;
      font-size: 16px;
    }

    .btn-ghost {
      display: none;
    }

    .btn-primary {
      padding: 8px 16px;
      font-size: 13px;
    }

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

    .hero-metrics {
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .hero-metric .num {
      font-size: 22px;
    }

    .cta-form {
      padding: 24px;
    }

    .feature-card {
      padding: 24px;
      flex-direction: column;
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      font-size: 18px;
    }

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

  /* ===== Focus ===== */
  a:focus-visible,
  button:focus-visible,
  input:focus-visible,
  textarea:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
  }

  @media (prefers-reduced-motion: reduce) {
    * {
      transition: none !important;
      animation: none !important;
    }
  }

/* roulang page: category2 */
:root {
            --primary: #1a4d8f;
            --primary-dark: #123763;
            --primary-light: #2d6ab8;
            --primary-soft: #eaf1fa;
            --accent: #f0a020;
            --accent-dark: #c87e0c;
            --accent-light: #ffbe4d;
            --accent-soft: #fef6e8;
            --ink: #1a2332;
            --ink-soft: #5b6b82;
            --ink-faint: #8b9ab0;
            --line: #e5eaf0;
            --line-dark: #cbd5e1;
            --bg: #ffffff;
            --bg-soft: #f6f8fb;
            --bg-dark: #0f1929;
            --radius-sm: .375rem;
            --radius: .75rem;
            --radius-lg: 1.25rem;
            --radius-xl: 1.75rem;
            --shadow-card: 0 4px 20px rgba(16, 32, 60, .06);
            --shadow-lift: 0 12px 40px rgba(16, 32, 60, .12);
            --shadow-glow: 0 0 0 4px rgba(26, 77, 143, .15);
            --space-section: 5.5rem;
        }

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

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        select,
        textarea {
            font: inherit;
            color: inherit;
            background: none;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        .container-full {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(16, 32, 60, .08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 1.25rem;
        }

        .logo-block {
            display: flex;
            align-items: center;
            gap: .65rem;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.15rem;
            box-shadow: 0 6px 16px rgba(26, 77, 143, .28);
        }

        .logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: .02em;
            color: var(--ink);
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: .25rem;
        }

        .nav-links a {
            padding: .55rem 1.05rem;
            border-radius: 999px;
            font-size: .95rem;
            font-weight: 500;
            color: var(--ink-soft);
            transition: all .25s ease;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-links a.active {
            color: var(--primary);
            background: var(--primary-soft);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: .75rem;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-soft);
            border: 1px solid var(--line);
            border-radius: 999px;
            padding: .4rem .8rem;
            gap: .5rem;
            transition: all .3s ease;
            width: 200px;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
            background: #fff;
        }

        .search-box i {
            color: var(--ink-faint);
            font-size: .85rem;
        }

        .search-box input {
            width: 100%;
            font-size: .875rem;
            background: transparent;
            border: none;
            outline: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .6rem 1.4rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: .9rem;
            transition: all .3s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(26, 77, 143, .25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(26, 77, 143, .32);
        }

        .btn-outline {
            border-color: var(--line-dark);
            color: var(--ink);
            background: #fff;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--ink);
            box-shadow: 0 6px 18px rgba(240, 160, 32, .3);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(240, 160, 32, .4);
            color: var(--ink);
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--bg-soft);
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            color: var(--ink);
            border: 1px solid var(--line);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--line);
            padding: 1rem 1.5rem 1.25rem;
            flex-direction: column;
            gap: .35rem;
        }

        .mobile-menu a {
            padding: .7rem 1rem;
            border-radius: .65rem;
            font-size: .95rem;
            font-weight: 500;
            color: var(--ink-soft);
        }

        .mobile-menu a:hover {
            background: var(--bg-soft);
            color: var(--primary);
        }

        .mobile-menu a.active {
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 600;
        }

        @media (max-width: 1024px) {
            .nav-links,
            .search-box {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .mobile-menu.open {
                display: flex;
            }
        }

        @media (max-width: 640px) {
            .header-inner {
                height: 66px;
            }
            .logo-text {
                font-size: 1.15rem;
            }
            .header-actions .btn-outline {
                display: none;
            }
        }

        .page-hero {
            position: relative;
            padding: 5.5rem 0 5rem;
            background: linear-gradient(135deg, #0f1929 0%, #1a3050 55%, #1d3c66 100%);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: .28;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            right: -120px;
            top: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 160, 32, .18), transparent 70%);
        }

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

        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: .5rem;
            font-size: .875rem;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 1.25rem;
        }

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

        .hero-tagline {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: rgba(240, 160, 32, .15);
            border: 1px solid rgba(240, 160, 32, .35);
            color: #ffbe4d;
            padding: .3rem 1rem;
            border-radius: 999px;
            font-size: .82rem;
            font-weight: 500;
            margin-bottom: 1.2rem;
        }

        .page-hero h1 {
            font-size: 2.75rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            max-width: 700px;
            margin-bottom: 1rem;
        }

        .page-hero p.lead {
            color: rgba(255, 255, 255, .8);
            font-size: 1.1rem;
            max-width: 660px;
            margin-bottom: 2rem;
        }

        .hero-stats {
            display: flex;
            gap: 2rem;
            margin-top: 2rem;
        }

        .hero-stat {
            border-left: 2px solid rgba(255, 255, 255, .25);
            padding-left: 1.25rem;
        }

        .hero-stat strong {
            display: block;
            font-size: 1.5rem;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stat span {
            font-size: .85rem;
            color: rgba(255, 255, 255, .6);
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 3.5rem 0;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 1rem 1.5rem;
            }
        }

        .section {
            padding: var(--space-section) 0;
        }

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

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

        .section-head {
            margin-bottom: 2.5rem;
            max-width: 720px;
        }

        .section-head .eyebrow {
            display: inline-block;
            font-size: .82rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-soft);
            padding: .25rem .9rem;
            border-radius: 999px;
            margin-bottom: .8rem;
            letter-spacing: .05em;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: .75rem;
        }

        .section-head p {
            color: var(--ink-soft);
            font-size: 1rem;
            line-height: 1.8;
        }

        .section-head.white h2 {
            color: #fff;
        }

        .section-head.white p {
            color: rgba(255, 255, 255, .7);
        }

        @media (max-width: 768px) {
            .section {
                padding: 3.5rem 0;
            }
            .section-head h2 {
                font-size: 1.6rem;
            }
        }

        .grid-solutions {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .solution-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 1.9rem 1.7rem;
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }

        .solution-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity .3s;
        }

        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lift);
            border-color: transparent;
        }

        .solution-card:hover::before {
            opacity: 1;
        }

        .solution-icon {
            width: 54px;
            height: 54px;
            background: var(--primary-soft);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 1.1rem;
        }

        .solution-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: .6rem;
        }

        .solution-card p {
            color: var(--ink-soft);
            font-size: .9rem;
            line-height: 1.75;
        }

        .solution-tags {
            display: flex;
            flex-wrap: wrap;
            gap: .4rem;
            margin-top: 1rem;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: .22rem .75rem;
            background: var(--bg-soft);
            border-radius: 999px;
            font-size: .76rem;
            font-weight: 500;
            color: var(--ink-soft);
            border: 1px solid var(--line);
        }

        .tag-blue {
            background: var(--primary-soft);
            color: var(--primary);
            border-color: transparent;
        }

        .tag-orange {
            background: var(--accent-soft);
            color: var(--accent-dark);
            border-color: transparent;
        }

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

        @media (max-width: 640px) {
            .grid-solutions {
                grid-template-columns: 1fr;
            }
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .case-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--line);
            transition: all .3s ease;
        }

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

        .case-cover {
            position: relative;
            height: 190px;
            overflow: hidden;
            background: var(--ink);
        }

        .case-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .case-card:hover .case-cover img {
            transform: scale(1.05);
        }

        .case-cover .badge {
            position: absolute;
            top: .9rem;
            left: .9rem;
            background: rgba(15, 25, 41, .8);
            color: #fff;
            border-radius: 999px;
            padding: .2rem .8rem;
            font-size: .74rem;
            backdrop-filter: blur(4px);
        }

        .case-body {
            padding: 1.4rem 1.4rem 1.6rem;
        }

        .case-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: .5rem;
        }

        .case-body p {
            font-size: .88rem;
            color: var(--ink-soft);
            line-height: 1.7;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 1rem;
            padding-top: .8rem;
            border-top: 1px solid var(--line);
            font-size: .8rem;
            color: var(--ink-faint);
        }

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

        @media (max-width: 640px) {
            .cases-grid {
                grid-template-columns: 1fr;
            }
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1rem;
        }

        .process-step {
            position: relative;
            text-align: center;
            padding: 1.5rem 1rem;
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: var(--radius-lg);
            transition: all .3s ease;
        }

        .process-step:hover {
            background: rgba(255, 255, 255, .08);
            border-color: rgba(240, 160, 32, .4);
        }

        .process-num {
            width: 44px;
            height: 44px;
            margin: 0 auto .8rem;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--ink);
        }

        .process-step h4 {
            color: #fff;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: .35rem;
        }

        .process-step p {
            color: rgba(255, 255, 255, .5);
            font-size: .78rem;
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .process-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 640px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .features-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .feature-media {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lift);
        }

        .feature-media img {
            width: 100%;
            min-height: 360px;
            object-fit: cover;
        }

        .feature-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
        }

        .feature-content p {
            color: var(--ink-soft);
            margin-bottom: 1.4rem;
        }

        .feature-list {
            display: flex;
            flex-direction: column;
            gap: .8rem;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: .7rem;
            font-size: .95rem;
        }

        .feature-list i {
            color: var(--primary);
            background: var(--primary-soft);
            border-radius: 50%;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .7rem;
            flex-shrink: 0;
            margin-top: .2rem;
        }

        @media (max-width: 768px) {
            .features-row {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .feature-media img {
                min-height: 240px;
            }
        }

        .spec-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }

        .spec-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 1.2rem 1.3rem;
            text-align: center;
            transition: all .3s;
        }

        .spec-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .spec-item i {
            color: var(--primary);
            font-size: 1.3rem;
            margin-bottom: .5rem;
        }

        .spec-item strong {
            display: block;
            font-size: .95rem;
            font-weight: 600;
        }

        .spec-item span {
            font-size: .82rem;
            color: var(--ink-faint);
        }

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

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

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: .8rem;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all .3s;
        }

        .faq-item:hover {
            border-color: var(--line-dark);
        }

        .faq-item summary {
            padding: 1.1rem 1.4rem;
            font-weight: 600;
            font-size: .98rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            transition: color .2s;
        }

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

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: .8rem;
            color: var(--ink-faint);
            transition: transform .3s;
            flex-shrink: 0;
        }

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

        .faq-item[open] summary {
            color: var(--primary);
        }

        .faq-item .answer {
            padding: 0 1.4rem 1.2rem;
            color: var(--ink-soft);
            font-size: .92rem;
            line-height: 1.8;
        }

        .cta-section {
            position: relative;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius-xl);
            padding: 3.5rem 3rem;
            text-align: center;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: .12;
        }

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

        .cta-section h2 {
            color: #fff;
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: .8rem;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .7);
            max-width: 580px;
            margin: 0 auto 1.8rem;
        }

        .cta-buttons {
            display: flex;
            gap: .8rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 2.5rem 1.5rem;
                border-radius: 1.25rem;
            }
        }

        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, .7);
            padding: 4rem 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 3rem;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: .65rem;
            margin-bottom: 1rem;
        }

        .footer-logo .logo-icon {
            width: 38px;
            height: 38px;
            font-size: 1rem;
        }

        .footer-logo span {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
        }

        .footer-brand p {
            font-size: .88rem;
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 1.2rem;
            color: rgba(255, 255, 255, .5);
        }

        .footer-social {
            display: flex;
            gap: .6rem;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .95rem;
            color: rgba(255, 255, 255, .55);
            transition: all .3s;
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--ink);
            border-color: var(--accent);
        }

        .footer-title {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.1rem;
        }

        .footer-links li {
            margin-bottom: .55rem;
        }

        .footer-links a {
            font-size: .88rem;
            color: rgba(255, 255, 255, .55);
            transition: color .25s;
        }

        .footer-links a:hover {
            color: var(--accent-light);
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: .65rem;
            font-size: .86rem;
            color: rgba(255, 255, 255, .55);
            margin-bottom: .65rem;
        }

        .footer-contact i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            padding: 1.5rem 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: .6rem;
        }

        .footer-copy {
            font-size: .82rem;
            color: rgba(255, 255, 255, .35);
        }

        .footer-copy a {
            color: rgba(255, 255, 255, .55);
        }

        .footer-copy a:hover {
            color: #fff;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        .resource-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.1rem;
        }

        .resource-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 1.2rem 1.3rem;
            transition: all .3s;
        }

        .resource-item:hover {
            box-shadow: var(--shadow-card);
            border-color: var(--line-dark);
            transform: translateY(-2px);
        }

        .resource-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .resource-item h4 {
            font-size: .98rem;
            font-weight: 600;
            margin-bottom: .25rem;
            color: var(--ink);
        }

        .resource-item p {
            font-size: .84rem;
            color: var(--ink-soft);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .resource-list {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 640px) {
            .resource-list {
                grid-template-columns: 1fr;
            }
            .container-full {
                padding-left: 1.1rem;
                padding-right: 1.1rem;
            }
        }

/* roulang page: category3 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #1e3a5f;
            --primary-dark: #142c47;
            --primary-light: #2d5a8e;
            --accent: #e67e22;
            --accent-hover: #cf6d17;
            --bg-light: #f5f7fa;
            --bg-white: #ffffff;
            --text-dark: #1e293b;
            --text-gray: #5b6b7f;
            --text-light: #8b9bad;
            --border: #e2e8f0;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.06);
            --shadow-md: 0 8px 30px rgba(30, 58, 95, 0.08);
            --shadow-lg: 0 16px 48px rgba(30, 58, 95, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ============ 基础 Reset ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ============ 容器 ============ */
        .container-full {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            box-shadow: 0 1px 20px rgba(30, 58, 95, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: -0.5px;
        }

        .site-logo i {
            color: var(--accent);
            font-size: 1.7rem;
        }

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

        .nav-link {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-dark);
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .nav-link:hover {
            background: rgba(30, 58, 95, 0.06);
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.22);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 8px 16px;
            width: 220px;
            transition: all var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(45, 90, 142, 0.12);
            background: #fff;
        }

        .search-box i {
            color: var(--text-light);
            font-size: 0.85rem;
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 0.88rem;
            width: 100%;
            color: var(--text-dark);
        }

        .search-box input::placeholder {
            color: var(--text-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            font-size: 0.93rem;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(30, 58, 95, 0.25);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 126, 34, 0.3);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-outline-dark:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(30, 58, 95, 0.2);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            background: var(--bg-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ============ Hero ============ */
        .page-hero {
            position: relative;
            padding: 110px 0 100px;
            background: linear-gradient(135deg, rgba(20, 44, 71, 0.92) 0%, rgba(30, 58, 95, 0.82) 60%, rgba(45, 90, 142, 0.75) 100%),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            right: -120px;
            top: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(230, 126, 34, 0.18);
            filter: blur(80px);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 999px;
            padding: 7px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

        .hero-content h1 {
            font-size: 3rem;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }

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

        .hero-content p {
            font-size: 1.12rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            max-width: 640px;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-metrics {
            display: flex;
            gap: 40px;
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

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

        .hero-metric strong {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
        }

        .hero-metric span {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ============ 通用 Section ============ */
        .section {
            padding: 88px 0;
        }

        .section-alt {
            background: var(--bg-white);
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            background: rgba(230, 126, 34, 0.1);
            color: var(--accent);
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 2px;
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: 2.3rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--primary);
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .section-head p {
            color: var(--text-gray);
            font-size: 1rem;
            line-height: 1.75;
        }

        /* ============ 技术领域卡片 ============ */
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .tech-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .tech-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity var(--transition);
        }

        .tech-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .tech-card:hover::before {
            opacity: 1;
        }

        .tech-icon {
            width: 60px;
            height: 60px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 20px;
            background: linear-gradient(135deg, rgba(30, 58, 95, 0.08), rgba(230, 126, 34, 0.08));
            color: var(--primary);
        }

        .tech-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .tech-card p {
            font-size: 0.9rem;
            color: var(--text-gray);
            line-height: 1.65;
            margin-bottom: 18px;
        }

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

        .tech-tags span {
            background: rgba(30, 58, 95, 0.06);
            color: var(--primary-light);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }

        /* ============ 应用场景 ============ */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scene-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            background: var(--bg-white);
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .scene-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .scene-card .scene-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .scene-card .scene-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .scene-card:hover .scene-img img {
            transform: scale(1.05);
        }

        .scene-card .scene-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60%;
            background: linear-gradient(to top, rgba(20, 44, 71, 0.5), transparent);
        }

        .scene-body {
            padding: 22px 20px 24px;
        }

        .scene-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .scene-body p {
            font-size: 0.87rem;
            color: var(--text-gray);
            line-height: 1.6;
        }

        /* ============ 技术流程 ============ */
        .process-section {
            background: var(--primary);
            color: #fff;
        }

        .process-section .section-head h2 {
            color: #fff;
        }

        .process-section .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }

        .process-section .section-tag {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            counter-reset: process;
        }

        .step-item {
            position: relative;
            padding: 32px 24px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(8px);
            transition: all var(--transition);
            counter-increment: process;
        }

        .step-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }

        .step-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 16px;
            font-family: 'Georgia', serif;
        }

        .step-num::before {
            content: "0" counter(process);
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
        }

        /* ============ 数据统计 ============ */
        .stats-section {
            background: var(--bg-white);
            border-top: 1px solid var(--border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }

        .stat-item {
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .stat-item:hover {
            background: var(--bg-light);
            border-color: var(--border);
            transform: translateY(-4px);
        }

        .stat-num {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-num .unit {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent);
            margin-left: 2px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-gray);
            font-weight: 500;
        }

        /* ============ 资讯列表 ============ */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .news-card .news-img {
            height: 160px;
            overflow: hidden;
        }

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

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

        .news-body {
            padding: 24px 24px 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .news-meta .date {
            font-size: 0.8rem;
            color: var(--text-light);
        }

        .news-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-dark);
            margin-bottom: 10px;
            transition: color var(--transition);
        }

        .news-card:hover .news-body h3 {
            color: var(--primary);
        }

        .news-body p {
            font-size: 0.88rem;
            color: var(--text-gray);
            line-height: 1.6;
            flex: 1;
        }

        .news-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-size: 0.88rem;
            font-weight: 600;
            margin-top: 16px;
            transition: gap var(--transition);
        }

        .news-link:hover {
            gap: 12px;
        }

        /* ============ FAQ ============ */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:focus-within,
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            background: none;
            transition: all var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(30, 58, 95, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all 0.4s ease;
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(135deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 60px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 24px;
            padding: 60px 64px;
            position: relative;
            overflow: hidden;
            text-align: center;
            color: #fff;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(230, 126, 34, 0.25);
            filter: blur(60px);
        }

        .cta-box::after {
            content: '';
            position: absolute;
            left: -60px;
            bottom: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            filter: blur(40px);
        }

        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            position: relative;
            z-index: 1;
        }

        .cta-box .cta-buttons {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0f1d2e;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: 16px;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
        }

        .footer-logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }

        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
        }

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

        .footer-links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: all var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact i {
            color: var(--accent);
            margin-top: 4px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 32px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-copy {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-copy a {
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-copy a:hover {
            color: var(--accent);
        }

        /* ============ 移动端菜单 ============ */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 16px 24px 24px;
            z-index: 999;
            transform: translateY(-10px);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-dark);
            transition: all var(--transition);
        }

        .mobile-menu a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu a.active {
            background: var(--primary);
            color: #fff;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .tech-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .header-actions .search-box {
                display: none;
            }
            .hero-content h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .container-full {
                padding: 0 20px;
            }
            .nav-links {
                display: none;
            }
            .header-actions .btn {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-menu {
                display: block;
            }
            .page-hero {
                padding: 80px 0 70px;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .hero-metrics {
                flex-wrap: wrap;
                gap: 24px;
            }
            .section {
                padding: 64px 0;
            }
            .section-head h2 {
                font-size: 1.8rem;
            }
            .cta-box {
                padding: 40px 28px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .tech-grid,
            .scene-grid,
            .process-grid,
            .stats-grid,
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .hero-buttons {
                flex-direction: column;
                width: 100%;
            }
            .hero-buttons .btn {
                width: 100%;
            }
            .container-full {
                padding: 0 16px;
            }
            .site-logo span {
                font-size: 1.2rem;
            }
        }