/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f6feb;
            --primary-dark: #0a55b5;
            --secondary: #07b2a0;
            --accent: #f59e0b;
            --dark: #0b1d33;
            --light: #f4f8fc;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
            --shadow: 0 14px 36px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 24px 54px rgba(0, 0, 0, 0.12);
            --transition: all 0.35s ease;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 90px;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background: #ffffff;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
        }

        /* ===== 玻璃导航 ===== */
        .glass-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.6);
            box-shadow: 0 4px 28px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .glass-header.scrolled {
            background: rgba(255, 255, 255, 0.94);
            box-shadow: 0 4px 34px rgba(2, 12, 27, 0.12);
        }
        .header-logo {
            font-size: 1.45rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-logo i {
            -webkit-text-fill-color: initial;
            background: initial;
        }
        .nav-link {
            font-weight: 500;
            font-size: 0.95rem;
            color: #334155;
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, var(--primary), #3d8bfd);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 10px 22px;
            border-radius: 50px;
            box-shadow: 0 6px 20px rgba(15, 111, 235, 0.3);
            transition: var(--transition);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(15, 111, 235, 0.4);
        }

        /* ===== 移动端导航 ===== */
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(11, 29, 51, 0.45);
            backdrop-filter: blur(4px);
            z-index: 199;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.35s ease;
        }
        .mobile-menu-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 340px;
            height: 100vh;
            background: #fff;
            z-index: 200;
            padding: 28px 24px;
            box-shadow: -8px 0 36px rgba(0, 0, 0, 0.14);
            transition: right 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            overflow-y: auto;
        }
        .mobile-menu.open {
            right: 0;
        }
        .mobile-menu a {
            display: block;
            padding: 14px 12px;
            border-radius: 12px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid #f1f5f9;
            transition: var(--transition);
        }
        .mobile-menu a:hover {
            background: #f0f7ff;
            color: var(--primary);
            padding-left: 16px;
        }
        .mobile-menu a.active {
            background: #e8f0fe;
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-menu .close-mobile-btn {
            border-bottom: none;
            text-align: right;
            font-size: 1.4rem;
            color: var(--text-light);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 94vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(8, 22, 40, 0.92) 0%, rgba(15, 111, 235, 0.78) 50%, rgba(7, 178, 160, 0.6) 100%), url('/assets/images/backpic/back-1.png') no-repeat center center/cover;
            padding-top: 100px;
            padding-bottom: 60px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.28);
            border-radius: 50px;
            padding: 8px 22px;
            color: #fff;
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .hero-badge i {
            color: #fbbf24;
        }
        .hero-title {
            font-size: clamp(2.3rem, 5vw, 3.8rem);
            font-weight: 800;
            line-height: 1.18;
            color: #fff;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .hero-title span {
            background: linear-gradient(90deg, #60a5fa, #34d3c4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            color: rgba(255, 255, 255, 0.92);
            font-size: clamp(1rem, 1.6vw, 1.2rem);
            line-height: 1.85;
            max-width: 640px;
        }
        .hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.88rem;
        }
        .hero-stat i {
            color: #fbbf24;
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), #3b82f6);
            color: #fff;
            font-weight: 600;
            padding: 15px 34px;
            border-radius: 50px;
            border: none;
            box-shadow: 0 8px 24px rgba(15, 111, 235, 0.35);
            transition: var(--transition);
            font-size: 1rem;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(15, 111, 235, 0.45);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-weight: 600;
            padding: 15px 34px;
            border-radius: 50px;
            transition: var(--transition);
            font-size: 1rem;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.28);
            transform: translateY(-3px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 26px;
            border: 2px solid var(--primary);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.92rem;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(15, 111, 235, 0.25);
        }

        /* ===== 板块容器 ===== */
        .section {
            padding: 92px 0;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            background: #eef5ff;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.82rem;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.6rem);
            font-weight: 800;
            line-height: 1.25;
            color: var(--dark);
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-light);
            line-height: 1.8;
            max-width: 680px;
        }

        /* ===== 卡片 ===== */
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 38px 30px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(15, 111, 235, 0.25);
        }
        .feature-icon {
            width: 58px;
            height: 58px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 22px;
        }
        .feature-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }
        .feature-text {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.75;
        }

        /* ===== 分类卡片 ===== */
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: block;
            height: 100%;
        }
        .category-card img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .category-card:hover img {
            transform: scale(1.06);
        }
        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }
        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 25%, rgba(11, 29, 51, 0.94) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 30px;
            color: #fff;
        }
        .category-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            color: #fff;
            margin-bottom: 10px;
            width: fit-content;
        }
        .category-overlay h3 {
            font-size: 1.45rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-overlay p {
            font-size: 0.9rem;
            opacity: 0.85;
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .category-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: #93c5fd;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-card:hover .category-link {
            color: #fff;
            gap: 10px;
        }

        /* ===== 资讯卡片 ===== */
        .news-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(15, 111, 235, 0.2);
        }
        .news-card img {
            height: 190px;
            object-fit: cover;
            width: 100%;
            transition: transform 0.5s ease;
        }
        .news-card:hover img {
            transform: scale(1.03);
        }
        .news-card-body {
            padding: 26px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .news-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            background: #eef5ff;
            color: var(--primary);
            font-size: 0.76rem;
            font-weight: 600;
            margin-bottom: 12px;
            width: fit-content;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.4;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.65;
            flex-grow: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-date {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            color: #94a3b8;
            margin-top: 16px;
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: linear-gradient(135deg, #0b1d33 0%, #0f3d77 50%, #0e5a9a 100%);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -15%;
            width: 480px;
            height: 480px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
        }
        .stats-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(7, 178, 160, 0.12);
            border-radius: 50%;
        }
        .stat-card {
            text-align: center;
            padding: 38px 24px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 6px;
        }

        /* ===== 流程步骤 ===== */
        .process-step {
            text-align: center;
            padding: 30px 20px;
            position: relative;
        }
        .process-step .step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #3b82f6);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 8px 24px rgba(15, 111, 235, 0.3);
        }
        .process-step .step-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .process-step .step-desc {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .process-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            color: #cbd5e1;
            font-size: 1.6rem;
            padding-top: 30px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: #fff;
            overflow: hidden;
            transition: var(--transition);
            margin-bottom: 14px;
        }
        .faq-item:hover {
            border-color: rgba(15, 111, 235, 0.3);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 22px 28px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 28px 22px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #0b1d33 0%, #0f6feb 55%, #07b2a0 100%);
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -15%;
            width: 420px;
            height: 420px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -5%;
            width: 260px;
            height: 260px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #071321;
            color: rgba(255, 255, 255, 0.65);
            padding: 60px 0 28px;
        }
        .site-footer .footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .footer-links li {
            margin-bottom: 10px;
            font-size: 0.9rem;
        }
        .footer-links li i {
            margin-right: 8px;
            color: var(--secondary);
            font-size: 0.75rem;
        }
        .footer-contact li {
            margin-bottom: 12px;
            font-size: 0.9rem;
            display: flex;
            gap: 10px;
            align-items: flex-start;
        }
        .footer-contact li i {
            color: var(--secondary);
            margin-top: 5px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 44px;
            padding-top: 24px;
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.45);
            text-align: center;
        }

        /* ===== 其他工具类 ===== */
        .empty-tip {
            grid-column: 1/-1;
            text-align: center;
            padding: 60px 20px;
            background: #f8fafc;
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
            color: var(--text-light);
            font-size: 1rem;
        }
        .divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border), transparent);
        }
        .hover-lift {
            transition: var(--transition);
        }
        .hover-lift:hover {
            transform: translateY(-4px);
        }

        /* ===== 焦点可见性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(15, 111, 235, 0.5);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ===== 动画 ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(28px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-up {
            animation: fadeUp 0.9s ease forwards;
        }
        .animate-delay-1 {
            animation-delay: 0.15s;
            opacity: 0;
        }
        .animate-delay-2 {
            animation-delay: 0.3s;
            opacity: 0;
        }
        .animate-delay-3 {
            animation-delay: 0.45s;
            opacity: 0;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 72px 0;
            }
            .category-card img {
                height: 220px;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none !important;
            }
            .mobile-nav-btn {
                display: flex !important;
            }
            .hero-section {
                min-height: 90vh;
                padding-top: 90px;
            }
            .section {
                padding: 60px 0;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .process-arrow {
                transform: rotate(90deg);
                padding: 6px 0;
            }
        }
        @media (min-width: 769px) {
            .desktop-nav {
                display: flex !important;
            }
            .mobile-nav-btn {
                display: none !important;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 13px 26px;
                font-size: 0.92rem;
                width: 100%;
                justify-content: center;
            }
            .hero-badge {
                font-size: 0.78rem;
                padding: 6px 14px;
            }
            .category-card img {
                height: 200px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .news-card-body {
                padding: 20px;
            }
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #eff6ff;
            --secondary: #7c3aed;
            --secondary-light: #f5f3ff;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 100px;
        }

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

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

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

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

        .glass-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
            transition: background 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
        }

        .glass-header.scrolled {
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
            border-bottom-color: rgba(226, 232, 240, 1);
        }

        .header-logo span {
            font-weight: 800;
            font-size: 1.25rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

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

        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.5rem 0.25rem;
            letter-spacing: 0.02em;
            transition: color 0.3s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: width 0.3s ease;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.25rem;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            transition: all 0.3s ease;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
        }

        .mobile-nav-btn {
            transition: var(--transition);
        }

        .mobile-nav-btn:hover {
            background: var(--primary-light) !important;
            color: var(--primary) !important;
            border-color: var(--primary) !important;
        }

        .mobile-menu {
            display: none;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border-top: 1px solid var(--border);
            padding: 1rem 1.5rem 1.5rem;
            flex-direction: column;
            gap: 0.5rem;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
        }

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

        .mobile-menu a {
            padding: 0.85rem 1rem;
            border-radius: 0.75rem;
            font-size: 1rem;
            color: var(--text);
            font-weight: 500;
            transition: all 0.2s ease;
        }

        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
            padding-left: 1.25rem;
        }

        .article-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 0 60px;
            overflow: hidden;
        }

        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .article-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 58, 138, 0.72), rgba(15, 23, 42, 0.88));
        }

        .article-hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            backdrop-filter: blur(8px);
            margin-bottom: 1.5rem;
            letter-spacing: 0.05em;
        }

        .hero-badge i {
            color: #34d399;
            font-size: 0.6rem;
        }

        .article-hero-content h1 {
            font-size: 2.25rem;
            line-height: 1.3;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
            margin-bottom: 1.25rem;
        }

        .hero-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.2rem;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
        }

        .breadcrumb-wrap {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.88rem;
            color: var(--text-secondary);
            padding: 1rem 0;
        }

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

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

        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-light);
        }

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

        .article-body-wrap {
            max-width: 860px;
            margin: 0 auto;
            padding: 48px 24px 56px;
        }

        .article-content {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--text);
        }

        .article-content h2 {
            font-size: 1.55rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: var(--text);
            letter-spacing: -0.01em;
            position: relative;
            padding-left: 0;
        }

        .article-content h2::before {
            content: "";
            display: none;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: var(--text);
        }

        .article-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }

        .article-content p {
            margin-bottom: 1.4rem;
        }

        .article-content ul {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
            list-style: disc;
        }

        .article-content ul li {
            margin-bottom: 0.45rem;
        }

        .article-content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
            list-style: decimal;
        }

        .article-content ol li {
            margin-bottom: 0.45rem;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .article-content a:hover {
            color: var(--primary-dark);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 1.2rem 1.5rem;
            border-radius: 0 0.75rem 0.75rem 0;
            margin: 1.5rem 0;
            font-style: italic;
            color: #334155;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: 1rem;
            margin: 2rem auto;
            box-shadow: var(--shadow-md);
            max-width: 100%;
        }

        .article-content pre {
            background: var(--bg-dark);
            color: #e2e8f0;
            padding: 1.5rem;
            border-radius: 1rem;
            overflow-x: auto;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .article-content code {
            background: #eef2f7;
            padding: 0.2rem 0.4rem;
            border-radius: 0.375rem;
            font-size: 0.9em;
            font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
        }

        .article-content pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .article-content th,
        .article-content td {
            padding: 0.75rem 1rem;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-content th {
            background: #f1f5f9;
            font-weight: 600;
        }

        .article-content hr {
            margin: 2.5rem 0;
            border: none;
            border-top: 1px solid var(--border);
        }

        .article-tags-wrap {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.75rem;
            padding-top: 1.5rem;
            margin-top: 2rem;
            border-top: 1px solid var(--border);
        }

        .article-tags-wrap .tag-label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            background: #f1f5f9;
            color: var(--text-secondary);
            font-size: 0.85rem;
            border: 1px solid transparent;
            transition: all 0.2s ease;
        }

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

        .share-wrap {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-top: 1.25rem;
            padding-top: 1.25rem;
            padding-bottom: 0.5rem;
        }

        .share-wrap .share-label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .share-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: #f1f5f9;
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: all 0.25s ease;
        }

        .share-btn:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .related-section {
            padding: 64px 0;
            background: var(--bg-white);
        }

        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-tag {
            display: inline-block;
            padding: 0.35rem 1.2rem;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            letter-spacing: 0.04em;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
        }

        .section-head p {
            color: var(--text-secondary);
            margin-top: 0.5rem;
            font-size: 1rem;
        }

        .related-card {
            display: block;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 1rem;
            overflow: hidden;
            transition: all 0.35s ease;
            height: 100%;
        }

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

        .related-card-cover {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

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

        .related-card-body {
            padding: 1.5rem;
        }

        .related-card-cat {
            display: inline-block;
            padding: 0.25rem 0.9rem;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        .related-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 0.5rem;
            transition: color 0.25s ease;
        }

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

        .related-card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 1rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card-meta {
            font-size: 0.82rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1e1b4b 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.3), transparent 70%);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.25), transparent 70%);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .cta-inner p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            margin-bottom: 2rem;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            box-shadow: 0 6px 24px rgba(37, 99, 235, 0.35);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(37, 99, 235, 0.45);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 2rem;
            border-radius: 999px;
            background: transparent;
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-3px);
        }

        .not-found-section {
            padding: 160px 24px 80px;
            text-align: center;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #f8fafc, #eff6ff);
        }

        .not-found-card {
            background: var(--bg-white);
            border-radius: 1.75rem;
            padding: 3rem 2.5rem;
            box-shadow: var(--shadow-lg);
            max-width: 480px;
            margin: 0 auto;
            text-align: center;
        }

        .not-found-card i {
            font-size: 3rem;
            color: var(--text-light);
            margin-bottom: 1rem;
        }

        .not-found-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .not-found-card p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }

        .site-footer {
            background: #0b1220;
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 24px;
            font-size: 0.95rem;
        }

        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 1rem;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.25rem;
            letter-spacing: 0.03em;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.25s ease;
        }

        .footer-links a i {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.35);
            transition: color 0.25s ease;
        }

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

        .footer-links a:hover i {
            color: var(--primary);
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact li i {
            color: var(--primary);
            font-size: 0.9rem;
            width: 20px;
            text-align: center;
        }

        .footer-copyright {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
        }

        .footer-copyright a {
            color: rgba(255, 255, 255, 0.4);
        }

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

        @media (max-width: 1024px) {
            .desktop-nav {
                gap: 1.2rem;
            }
            .nav-link {
                font-size: 0.85rem;
            }
            .article-hero-content h1 {
                font-size: 2rem;
            }
            .related-card-cover {
                height: 160px;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .article-hero {
                min-height: 360px;
                padding: 100px 0 48px;
            }
            .article-hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-meta {
                gap: 0.8rem;
                font-size: 0.82rem;
            }
            .article-body-wrap {
                padding: 32px 20px 40px;
            }
            .article-content {
                font-size: 1rem;
            }
            .section-head h2 {
                font-size: 1.6rem;
            }
            .cta-inner h2 {
                font-size: 1.7rem;
            }
            .footer-copyright {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .article-hero {
                min-height: 300px;
                padding: 88px 0 40px;
            }
            .article-hero-content h1 {
                font-size: 1.35rem;
            }
            .hero-badge {
                font-size: 0.78rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .article-body-wrap {
                padding: 24px 16px 36px;
            }
            .related-card-cover {
                height: 140px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 0.7rem 1.5rem;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .cta-btns {
                flex-direction: column;
                gap: 0.75rem;
                width: 100%;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #4f46e5;
            --secondary: #7c3aed;
            --accent: #0ea5e9;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #0f172a;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --shadow-sm: 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow: 0 12px 32px rgba(15, 23, 42, 0.10);
            --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.12);
            --transition: all .3s ease;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.4);
            outline-offset: 2px;
        }

        .glass-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            transition: box-shadow .3s ease, background .3s ease;
        }
        .glass-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
        }
        .header-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .header-logo:hover {
            color: var(--primary);
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 0.5rem 0.125rem;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--text);
        }
        .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: .6rem 1.5rem;
            border-radius: 999px;
            font-size: .9rem;
            font-weight: 500;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.30);
            transition: var(--transition);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.40);
            color: #fff;
        }

        .mobile-nav-btn {
            display: none;
        }

        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: 73px;
            left: 0;
            right: 0;
            z-index: 49;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 16px 32px rgba(15, 23, 42, 0.10);
            max-height: calc(100vh - 73px);
            overflow-y: auto;
        }
        .mobile-menu-panel.open {
            display: block;
        }

        .banner-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .banner-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 0%, rgba(79, 70, 229, 0.75) 55%, rgba(14, 165, 233, 0.55) 100%);
        }

        .section {
            padding: 5rem 0;
        }
        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 3.5rem;
        }
        .section-tag {
            display: inline-block;
            font-size: .85rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(79, 70, 229, 0.08);
            padding: .35rem 1rem;
            border-radius: 999px;
            margin-bottom: 1rem;
            letter-spacing: .02em;
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text);
        }
        .section-subtitle {
            margin-top: 1rem;
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        .stat-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.75rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .stat-num {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .solution-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.15);
        }
        .card-icon {
            width: 3.5rem;
            height: 3.5rem;
            border-radius: 1rem;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(124, 58, 237, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 1.25rem;
        }
        .solution-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: .75rem;
            color: var(--text);
        }
        .solution-card p {
            color: var(--text-light);
            font-size: .95rem;
            line-height: 1.7;
            flex: 1;
        }
        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: .5rem;
            margin-top: 1.25rem;
        }
        .tag {
            display: inline-block;
            font-size: .8rem;
            font-weight: 500;
            color: var(--primary);
            background: rgba(79, 70, 229, 0.07);
            border: 1px solid rgba(79, 70, 229, 0.12);
            padding: .25rem .75rem;
            border-radius: 999px;
            transition: var(--transition);
        }
        .tag:hover {
            background: rgba(79, 70, 229, 0.12);
        }

        .feature-image {
            overflow: hidden;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }
        .feature-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .feature-image:hover img {
            transform: scale(1.03);
        }

        .check-list {
            list-style: none;
        }
        .check-list li {
            display: flex;
            align-items: center;
            gap: .75rem;
            padding: .5rem 0;
            color: var(--text);
            font-size: .98rem;
        }
        .check-list i {
            color: var(--primary);
            font-size: 1.1rem;
        }

        .process-step {
            position: relative;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem 1.5rem 1.5rem;
            transition: var(--transition);
            height: 100%;
        }
        .process-step:hover {
            box-shadow: var(--shadow);
            transform: translateY(-4px);
        }
        .process-num {
            width: 3rem;
            height: 3rem;
            border-radius: 1rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
        }
        .process-step h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: .5rem;
        }
        .process-step p {
            color: var(--text-light);
            font-size: .92rem;
            line-height: 1.65;
        }

        .article-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .article-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .article-card:hover .article-img {
            transform: scale(1.05);
        }
        .article-title {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: .75rem 0 .5rem;
            transition: var(--transition);
        }
        .article-title:hover {
            color: var(--primary);
        }
        .article-card p {
            color: var(--text-light);
            font-size: .9rem;
            line-height: 1.65;
            flex: 1;
        }
        .read-more {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            color: var(--primary);
            font-weight: 600;
            font-size: .9rem;
            margin-top: 1rem;
        }
        .read-more:hover {
            gap: .75rem;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.active {
            box-shadow: var(--shadow-sm);
            border-color: rgba(79, 70, 229, 0.2);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            background: transparent;
            border: none;
            text-align: left;
        }
        .faq-question i {
            color: var(--text-light);
            transition: transform .3s ease;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-answer p {
            padding: 0 1.5rem 1.5rem;
            color: var(--text-light);
            line-height: 1.7;
            font-size: .95rem;
        }

        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            border-radius: var(--radius-lg);
            padding: 4rem 3rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            margin-top: .75rem;
            position: relative;
            z-index: 1;
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            padding: .85rem 2rem;
            border-radius: 999px;
            margin-top: 1.5rem;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }
        .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
            color: var(--primary);
        }
        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-weight: 600;
            padding: .85rem 2rem;
            border-radius: 999px;
            margin-top: 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }
        .btn-white-outline:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
            color: #fff;
        }

        .btn-white-glow {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            padding: .85rem 2rem;
            border-radius: 999px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
        }
        .btn-white-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(255, 255, 255, 0.25);
            color: var(--primary);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            font-weight: 500;
            padding: .85rem 2rem;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-3px);
            color: #fff;
        }

        .site-footer {
            background: #0b1120;
            color: #94a3b8;
            padding: 5rem 0 2.5rem;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-title {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.25rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: .6rem;
        }
        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            color: #94a3b8;
            font-size: .92rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-links i {
            color: var(--primary);
            font-size: .7rem;
        }

        @media (max-width: 1024px) {
            .section {
                padding: 4rem 0;
            }
            .section-title {
                font-size: 1.9rem;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-nav-btn {
                display: flex;
            }
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .banner-section {
                min-height: 400px;
            }
            .cta-section {
                padding: 3rem 1.5rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .stat-num {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 1.4rem;
            }
            .nav-cta {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1e5eff;
            --primary-dark: #0b3fd1;
            --primary-light: #4d8bff;
            --secondary: #06b6d4;
            --ink: #0f172a;
            --muted: #5b6b7f;
            --bg-light: #f6f9fc;
            --card-bg: #ffffff;
            --line: #e2e8f0;
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.625rem;
            --shadow-xl: 0 24px 48px -12px rgba(15, 23, 42, 0.18);
            --shadow-md: 0 12px 28px -8px rgba(15, 23, 42, 0.12);
        }

        /* ===== 基础 Reset ===== */
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
            color: var(--ink);
            background: var(--bg-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: color 0.25s; }
        img { max-width: 100%; display: block; }
        button { cursor: pointer; font-family: inherit; }
        h1, h2, h3, h4, h5 { line-height: 1.3; }

        /* ===== 玻璃导航 ===== */
        .glass-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.75);
            box-shadow: 0 4px 24px rgba(15, 23, 42, 0.05);
            transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
        }
        .glass-header.solid {
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--line);
            box-shadow: 0 8px 32px rgba(15, 23, 42, 0.08);
        }
        .header-logo span:last-child {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--ink);
        }
        .desktop-nav .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: #475569;
            padding: 0.45rem 0.2rem;
            position: relative;
            transition: color 0.25s;
        }
        .desktop-nav .nav-link:hover {
            color: var(--primary);
        }
        .desktop-nav .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0; left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 24px; height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 99px;
            transition: transform 0.3s ease;
        }
        .desktop-nav .nav-link:hover::after,
        .desktop-nav .nav-link.active::after {
            transform: translateX(-50%) scaleX(1);
        }
        .desktop-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            padding: 0.55rem 1.25rem;
            border-radius: 99px;
            transition: transform 0.25s, box-shadow 0.25s;
        }
        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 10px 24px rgba(30, 94, 255, 0.28);
        }
        .mobile-nav-btn:focus {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }
        .mobile-menu-panel {
            position: fixed;
            top: 72px; left: 0; right: 0;
            z-index: 99;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--line);
            box-shadow: 0 24px 48px rgba(15, 23, 42, 0.12);
            padding: 1.25rem 1.5rem 1.75rem;
            transform: translateY(-12px);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .mobile-menu-panel.visible {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .mobile-menu-panel .mobile-nav-link {
            display: block;
            padding: 0.8rem 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--ink);
            border-bottom: 1px solid #f1f5f9;
        }
        .mobile-menu-panel .mobile-nav-link:hover,
        .mobile-menu-panel .mobile-nav-link.active {
            color: var(--primary);
        }
        .mobile-menu-panel .mobile-cta {
            display: inline-flex;
            margin-top: 1rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 0.6rem 1.4rem;
            border-radius: 99px;
            font-size: 0.9rem;
            font-weight: 600;
        }

        /* ===== 通用内页 Banner ===== */
        .page-banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            margin-top: 72px;
        }
        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(2, 8, 23, 0.88) 5%, rgba(10, 25, 50, 0.72) 55%, rgba(30, 64, 175, 0.45) 100%);
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 4rem 0 4.5rem;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            padding: 0.35rem 1rem;
            border-radius: 99px;
            backdrop-filter: blur(8px);
            margin-bottom: 1.25rem;
        }
        .page-banner h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 700;
            color: #fff;
            max-width: 680px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.88);
            font-size: 1.05rem;
            max-width: 620px;
            margin-top: 0.9rem;
        }
        .banner-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.75rem;
        }
        .btn-primary, .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.95rem;
            font-weight: 600;
            padding: 0.7rem 1.5rem;
            border-radius: 0.75rem;
            transition: all 0.25s;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 8px 20px rgba(30, 94, 255, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 32px rgba(30, 94, 255, 0.36);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            backdrop-filter: blur(8px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 4.5rem 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-title {
            font-size: clamp(1.5rem, 2.6vw, 2.1rem);
            font-weight: 700;
            color: var(--ink);
        }
        .section-subtitle {
            color: var(--muted);
            font-size: 1rem;
            margin-top: 0.6rem;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 2.75rem;
        }
        .title-tag {
            display: inline-flex;
            align-items: center;
            background: rgba(30, 94, 255, 0.08);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 0.3rem 0.9rem;
            border-radius: 99px;
            margin-bottom: 0.8rem;
        }
        .title-tag .dot {
            width: 6px; height: 6px;
            border-radius: 50%;
            background: var(--secondary);
            margin-right: 0.45rem;
        }

        /* ===== 信息卡片 ===== */
        .info-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .info-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.6rem;
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }
        .info-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(30, 94, 255, 0.2);
        }
        .info-card .card-icon {
            width: 50px; height: 50px;
            border-radius: 1rem;
            background: linear-gradient(135deg, rgba(30, 94, 255, 0.1), rgba(6, 182, 212, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.3rem;
            margin-bottom: 1.1rem;
        }
        .info-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
        }
        .info-card p {
            font-size: 0.92rem;
            color: var(--muted);
        }

        /* ===== 产品卡片 ===== */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.75rem;
        }
        .product-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-xl);
            border-color: rgba(30, 94, 255, 0.22);
        }
        .product-card .product-img {
            height: 200px;
            width: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-img {
            transform: scale(1.04);
        }
        .product-card .product-body {
            padding: 1.4rem 1.5rem 1.6rem;
        }
        .product-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 0.45rem;
        }
        .product-card p {
            font-size: 0.88rem;
            color: var(--muted);
            margin-bottom: 0.9rem;
        }
        .product-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
        }
        .product-tags .tag {
            background: #f1f5f9;
            color: #475569;
            font-size: 0.72rem;
            font-weight: 500;
            padding: 0.22rem 0.6rem;
            border-radius: 0.4rem;
        }
        .product-card .product-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            color: var(--primary);
            font-size: 0.88rem;
            font-weight: 600;
            margin-top: 1rem;
        }
        .product-card .product-link i {
            transition: transform 0.25s;
        }
        .product-card .product-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 数据统计区 ===== */
        .stats-band {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 4.5rem 0;
        }
        .stats-band::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(2, 10, 28, 0.82);
        }
        .stats-band .max-w-7xl {
            position: relative;
            z-index: 2;
        }
        .stat-item {
            text-align: center;
            padding: 1.75rem 1rem;
            border-radius: 1.25rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            transition: background 0.3s, border-color 0.3s;
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
        }
        .stat-item .number {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.35rem;
        }

        /* ===== 应用领域 ===== */
        .resize-area-list {
            display: grid;
            gap: 0.75rem;
        }
        .resize-area-list li {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding: 1rem 1.1rem;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 0.9rem;
            font-size: 0.95rem;
            font-weight: 500;
            transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
        }
        .resize-area-list li:hover {
            transform: translateX(4px);
            border-color: rgba(30, 94, 255, 0.25);
            box-shadow: var(--shadow-md);
        }
        .resize-area-list li .area-icon {
            min-width: 38px; height: 38px;
            border-radius: 10px;
            background: rgba(30, 94, 255, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
        }

        /* ===== 流程步骤 ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 1.5rem;
        }
        .process-step {
            position: relative;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 1.5rem 1.3rem;
            text-align: center;
        }
        .process-step .step-number {
            width: 38px; height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 0.9rem;
        }
        .process-step h4 {
            font-size: 0.98rem;
            font-weight: 700;
            margin-bottom: 0.35rem;
        }
        .process-step p {
            font-size: 0.83rem;
            color: var(--muted);
        }
        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 740px;
            margin: 0 auto;
            display: grid;
            gap: 1rem;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 1rem;
            overflow: hidden;
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .faq-item:hover {
            border-color: rgba(30, 94, 255, 0.2);
        }
        .faq-item summary {
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.1rem 1.4rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--ink);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 26px; height: 26px;
            border-radius: 50%;
            background: rgba(30, 94, 255, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: transform 0.3s;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-item .faq-answer {
            padding: 0 1.4rem 1.3rem;
            font-size: 0.9rem;
            color: var(--muted);
            border-top: 1px dashed #f1f5f9;
            margin: 0 1.4rem 1.3rem;
            padding: 0.85rem 0 0;
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(2, 8, 23, 0.9) 0%, rgba(15, 23, 42, 0.75) 100%);
        }
        .cta-section .max-w-7xl {
            position: relative;
            z-index: 2;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0b1220;
            color: rgba(255, 255, 255, 0.75);
            padding: 4rem 0 0;
        }
        .site-footer .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .site-footer .footer-title {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            letter-spacing: 0.02em;
        }
        .site-footer .footer-links {
            list-style: none;
            display: grid;
            gap: 0.55rem;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.62);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            transition: color 0.25s, padding-left 0.25s;
        }
        .site-footer .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .site-footer .footer-links a i {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .site-footer .footer-links li {
            color: rgba(255, 255, 255, 0.62);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .site-footer .footer-links li i {
            color: var(--primary-light);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 3.25rem;
            padding: 1.4rem 0;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar { width: 10px; }
        ::-webkit-scrollbar-track { background: #f1f5f9; }
        ::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 99px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }

        /* ===== 响应式调整 ===== */
        @media (max-width: 1024px) {
            .desktop-nav { display: none; }
            .nav-cta { display: none; }
        }
        @media (min-width: 1025px) {
            .mobile-nav-btn { display: none; }
        }
        @media (max-width: 768px) {
            .section { padding: 3.25rem 0; }
            .page-banner { min-height: 350px; margin-top: 64px; }
            .page-banner .banner-content { padding: 2.75rem 0 3rem; }
            .product-grid { gap: 1.25rem; }
            .info-cards { gap: 1rem; }
        }
        @media (max-width: 520px) {
            .page-banner h1 { font-size: 1.6rem; }
            .page-banner p { font-size: 0.92rem; }
            .banner-btns { flex-direction: column; align-items: flex-start; }
            .banner-btns .btn-primary,
            .banner-btns .btn-ghost { width: 100%; justify-content: center; }
            .stat-item .number { font-size: 1.7rem; }
            .process-steps { grid-template-columns: 1fr; }
        }

/* roulang page: category3 */
:root {
            --primary: #2563eb;
            --secondary: #06b6d4;
            --dark: #0f172a;
            --text: #334155;
            --muted: #64748b;
            --border: #e2e8f0;
            --bg-light: #f8fafc;
            --radius: 1rem;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text);
            background: #ffffff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }

        /* 导航 */
        .glass-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.35);
            transition: all .35s ease;
        }
        .glass-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            border-bottom-color: rgba(226, 232, 240, 0.7);
        }
        .header-logo {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--dark);
            transition: opacity .2s;
        }
        .header-logo:hover {
            opacity: 0.85;
        }
        .nav-link {
            font-size: 0.92rem;
            font-weight: 500;
            color: #475569;
            padding: 0.4rem 0.2rem;
            position: relative;
            transition: color .2s;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        .nav-cta {
            padding: 0.5rem 1.2rem;
            border-radius: 0.75rem;
            font-size: 0.88rem;
            font-weight: 500;
            background: var(--dark);
            color: #fff;
            transition: background .2s, transform .2s;
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover {
            background: var(--primary);
            transform: translateY(-1px);
        }
        .mobile-nav-btn {
            display: none;
        }
        .mobile-menu {
            background: #fff;
            border-top: 1px solid #f1f5f9;
            padding: 1rem 1.25rem 1.5rem;
            box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
        }
        .mobile-menu a {
            display: block;
            padding: 0.7rem 0.75rem;
            border-radius: 0.55rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: #334155;
            transition: background .2s, color .2s;
        }
        .mobile-menu a:hover {
            background: #f1f5f9;
            color: var(--primary);
        }
        .mobile-menu a.active {
            color: var(--primary);
            background: #eff6ff;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none !important;
            }
            .nav-cta {
                display: none !important;
            }
            .mobile-nav-btn {
                display: flex;
            }
        }

        /* 通用区块 */
        .section-padding {
            padding: 4.5rem 0;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.4rem 1rem;
            background: #eff6ff;
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 999px;
            letter-spacing: 0.02em;
            border: 1px solid #dbeafe;
        }

        /* 卡片 */
        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem 1.6rem;
            transition: all .3s ease;
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: #dbeafe;
        }
        .app-card {
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.8rem 1.5rem;
            transition: all .3s ease;
            height: 100%;
        }
        .app-card:hover {
            background: #fff;
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: #bfdbfe;
        }
        .step-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 2rem 1.6rem;
            position: relative;
            transition: all .3s ease;
            height: 100%;
        }
        .step-card:hover {
            box-shadow: var(--shadow);
            border-color: #bae6fd;
        }
        .case-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all .3s ease;
        }
        .case-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 0.9rem;
            background: #fff;
            overflow: hidden;
            transition: border-color .2s, box-shadow .2s;
        }
        .faq-item:hover {
            border-color: #bfdbfe;
            box-shadow: 0 2px 12px rgba(37, 99, 235, 0.06);
        }
        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 1.2rem 1.4rem;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .fa-chevron-down {
            transition: transform .3s;
            color: var(--muted);
            font-size: 0.8rem;
            flex-shrink: 0;
        }
        .faq-item[open] summary .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 1.4rem 1.3rem;
            color: var(--muted);
            font-size: 0.93rem;
            line-height: 1.8;
        }

        /* 页脚 */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 0;
        }
        .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-title {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 0.6rem;
        }
        .footer-links a {
            color: #94a3b8;
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: color .2s, padding-left .2s;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 0.25rem;
        }
        .footer-links i {
            font-size: 0.7rem;
            color: #64748b;
        }
        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.15);
            padding: 1.5rem 0;
            margin-top: 3rem;
            font-size: 0.83rem;
            color: #64748b;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        /* 输入框 */
        .form-control {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border);
            border-radius: 0.7rem;
            font-size: 0.92rem;
            transition: border-color .2s, box-shadow .2s;
            background: #fff;
            outline: none;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }
        .btn-submit {
            width: 100%;
            padding: 0.8rem 1.5rem;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            border-radius: 0.7rem;
            cursor: pointer;
            transition: opacity .2s, transform .2s;
        }
        .btn-submit:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }

        /* 动画 */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity .6s ease, transform .6s ease;
        }
        .fade-up.show {
            opacity: 1;
            transform: translateY(0);
        }