/* roulang page: index */
:root {
            --brand-50: #EFF6FF;
            --brand-100: #DBEAFF;
            --brand-500: #2D8CF0;
            --brand-600: #1A7AE0;
            --brand-700: #1060B8;
            --brand-900: #0A3D78;
            --accent-400: #FF9440;
            --accent-500: #FF7A1A;
            --accent-600: #E56500;
            --bg-body: #F7F9FC;
            --bg-dark: #16242F;
            --text-main: #1A2B3C;
            --text-secondary: #5A6B7C;
            --text-muted: #8A9BAB;
            --border-color: #E3EAF2;
            --divider-color: #EEF2F7;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-img: 20px;
            --shadow-sm: 0 1px 3px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 8px 24px rgba(45, 140, 240, 0.10);
            --shadow-lg: 0 12px 32px rgba(26, 43, 60, 0.12);
            --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ---------- 导航 ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.4);
            box-shadow: 0 4px 20px rgba(26, 43, 60, 0.06);
            transition: background 0.2s ease-out, box-shadow 0.2s ease-out;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.95);
            border-bottom-color: rgba(26, 43, 60, 0.08);
            box-shadow: 0 4px 24px rgba(26, 43, 60, 0.08);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-700);
            white-space: nowrap;
        }

        .site-logo .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-link {
            position: relative;
            font-size: 0.9375rem;
            color: var(--brand-700);
            font-weight: 500;
            padding: 8px 0;
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--brand-500);
            transition: width 0.25s ease-out;
        }

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

        .nav-link:hover,
        .nav-link.active {
            color: var(--brand-500);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: #F0F4F8;
            border-radius: var(--radius-btn);
            padding: 0 14px;
            height: 40px;
            width: 200px;
            border: 1px solid transparent;
            transition: all 0.2s ease-out;
        }

        .nav-search:focus-within {
            background: #fff;
            border-color: var(--brand-500);
            box-shadow: 0 0 0 3px rgba(45, 140, 240, 0.15);
        }

        .nav-search input {
            width: 100%;
            background: transparent;
            font-size: 0.875rem;
            color: var(--text-main);
            margin-left: 8px;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

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

        .btn-login {
            background: var(--accent-500);
            color: #fff;
            font-weight: 600;
            font-size: 0.875rem;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: all 0.2s ease-out;
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-login:hover {
            background: var(--accent-400);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 122, 26, 0.3);
        }

        .btn-login:active {
            transform: translateY(0);
            background: var(--accent-600);
        }

        .btn-login:focus-visible {
            outline: 2px solid var(--accent-500);
            outline-offset: 2px;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--brand-700);
            cursor: pointer;
            border: 1px solid var(--border-color);
            background: #fff;
        }

        .nav-toggle:hover {
            background: var(--brand-50);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 280px;
            z-index: 60;
            background: #fff;
            box-shadow: var(--shadow-lg);
            padding: 24px;
            flex-direction: column;
            gap: 8px;
            transform: translateX(100%);
            transition: transform 0.3s ease-out;
        }

        .mobile-menu.open {
            transform: translateX(0);
        }

        .mobile-menu .mobile-logo {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--brand-700);
            padding-bottom: 16px;
            border-bottom: 1px solid var(--divider-color);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-menu .mobile-link {
            padding: 12px 12px;
            font-size: 1rem;
            color: var(--text-main);
            border-radius: 8px;
            font-weight: 500;
        }

        .mobile-menu .mobile-link:hover,
        .mobile-menu .mobile-link.active {
            background: var(--brand-50);
            color: var(--brand-600);
        }

        .mobile-menu .btn-login {
            margin-top: auto;
            text-align: center;
            padding: 12px 20px;
        }

        .mobile-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-body);
            color: var(--text-main);
            cursor: pointer;
            font-size: 0.9rem;
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(22, 36, 47, 0.4);
            z-index: 55;
            backdrop-filter: blur(2px);
        }

        .mobile-overlay.active {
            display: block;
        }

        /* ---------- Hero ---------- */
        .hero {
            min-height: 640px;
            position: relative;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #ffffff 0%, #EFF6FF 100%);
            overflow: hidden;
            padding-top: 76px;
        }

        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.85) 0%, rgba(239, 246, 255, 0.94) 50%, rgba(255, 255, 255, 0.7) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 55% 45%;
            gap: 60px;
            align-items: center;
            padding: 60px 0 40px;
        }

        .hero-text h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        .hero-text h1 .highlight {
            color: var(--brand-600);
            position: relative;
        }

        .hero-subtitle {
            font-size: 1.0625rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .btn-primary {
            background: var(--accent-500);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s ease-out;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--accent-400);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 122, 26, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
            background: var(--accent-600);
        }

        .btn-outline {
            background: transparent;
            color: var(--brand-600);
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            border: 1.5px solid var(--brand-500);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s ease-out;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: var(--brand-50);
            border-color: var(--brand-600);
            color: var(--brand-700);
        }

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

        .hero-trust {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .trust-chip {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8125rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .trust-chip i {
            color: var(--brand-500);
            font-size: 0.9rem;
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-img);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .hero-visual img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .hero-visual .visual-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(8px);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--brand-700);
            display: flex;
            align-items: center;
            gap: 6px;
            box-shadow: var(--shadow-sm);
        }

        .scroll-down {
            position: absolute;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-500);
            font-size: 0.9rem;
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: transform 0.2s ease-out;
            z-index: 3;
        }

        .scroll-down:hover {
            transform: translateX(-50%) translateY(4px);
        }

        /* ---------- 信任数据条 ---------- */
        .stats-bar {
            background: #fff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            padding: 40px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 12px;
        }

        .stat-number {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 700;
            color: var(--accent-500);
            font-feature-settings: "tnum";
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ---------- 板块通用 ---------- */
        .section {
            padding: 90px 0;
        }

        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 48px;
            gap: 24px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-50);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
        }

        .section-header .section-desc {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            max-width: 480px;
            line-height: 1.7;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand-600);
            font-size: 0.875rem;
            font-weight: 600;
            white-space: nowrap;
            transition: all 0.2s ease-out;
            cursor: pointer;
        }

        .text-link:hover {
            gap: 12px;
            color: var(--brand-700);
        }

        /* ---------- 解决方案 Z字 ---------- */
        .solution-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 80px;
        }

        .solution-row:last-child {
            margin-bottom: 0;
        }

        .solution-row.reverse .solution-text {
            order: 2;
        }

        .solution-row.reverse .solution-visual {
            order: 1;
        }

        .solution-text .sol-label {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-50);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .solution-text h3 {
            font-size: 1.375rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .solution-text p {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .solution-visual {
            border-radius: var(--radius-img);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }

        .solution-visual img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform 0.3s ease-out;
        }

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

        /* ---------- 成果展示 ---------- */
        .achievements {
            background: var(--bg-dark);
            padding: 90px 0;
        }

        .achievements-inner {
            display: grid;
            grid-template-columns: 40% 60%;
            gap: 64px;
            align-items: center;
        }

        .achievements-title {
            color: #fff;
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .achievements-desc {
            color: #A0B2C4;
            font-size: 0.9375rem;
            line-height: 1.75;
        }

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

        .achieve-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            transition: all 0.2s ease-out;
        }

        .achieve-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(77, 163, 255, 0.3);
        }

        .achieve-number {
            font-size: clamp(2rem, 4vw, 2.75rem);
            font-weight: 700;
            color: #4DA3FF;
            font-feature-settings: "tnum";
            line-height: 1.2;
        }

        .achieve-label {
            color: #A0B2C4;
            font-size: 0.875rem;
            margin-top: 8px;
        }

        /* ---------- 客户证言 ---------- */
        .testimonials {
            background: var(--bg-body);
            padding: 90px 0;
        }

        .testimonial-layout {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 24px;
        }

        .testimonial-main {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            border-left: 3px solid var(--brand-500);
            padding: 36px;
            box-shadow: var(--shadow-sm);
        }

        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            transition: all 0.2s ease-out;
        }

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

        .testimonial-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .stars {
            color: var(--accent-500);
            font-size: 0.875rem;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }

        .testimonial-text {
            color: var(--text-main);
            font-size: 0.9375rem;
            line-height: 1.8;
            margin-bottom: 20px;
        }

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

        .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            font-weight: 700;
            font-size: 0.875rem;
            flex-shrink: 0;
        }

        .author-name {
            font-weight: 600;
            font-size: 0.875rem;
            color: var(--text-main);
        }

        .author-role {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        /* ---------- 资讯区 ---------- */
        .news-section {
            background: var(--bg-body);
            padding: 90px 0;
            border-top: 1px solid var(--border-color);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .news-featured {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.2s ease-out;
            display: block;
        }

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

        .news-featured-cover {
            position: relative;
            overflow: hidden;
            height: 260px;
        }

        .news-featured-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease-out;
        }

        .news-featured:hover .news-featured-cover img {
            transform: scale(1.03);
        }

        .news-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent-500);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
        }

        .news-featured-body {
            padding: 24px;
        }

        .news-featured-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 12px 0 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-featured-body p {
            color: var(--text-secondary);
            font-size: 0.875rem;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .news-meta i {
            margin-right: 4px;
        }

        .tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
        }

        .tag-brand {
            background: var(--brand-50);
            color: var(--brand-600);
        }

        .tag-light {
            background: var(--bg-body);
            color: var(--text-secondary);
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-list-item {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            padding: 16px;
            display: flex;
            gap: 16px;
            box-shadow: var(--shadow-sm);
            transition: all 0.2s ease-out;
        }

        .news-list-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: #BBD6F5;
        }

        .news-list-item img {
            width: 120px;
            height: 90px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }

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

        .news-list-content h4 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-list-content p {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .news-list-content .news-meta {
            gap: 8px;
            font-size: 0.75rem;
        }

        .empty-state {
            background: #fff;
            border: 2px dashed var(--border-color);
            border-radius: var(--radius-card);
            padding: 60px;
            text-align: center;
            color: var(--text-muted);
        }

        .empty-state .empty-icon {
            font-size: 2.5rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            opacity: 0.4;
        }

        .empty-state p {
            font-size: 0.9375rem;
        }

        /* ---------- FAQ ---------- */
        .faq-section {
            background: #fff;
            padding: 90px 0;
            border-top: 1px solid var(--border-color);
        }

        .faq-layout {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            margin-bottom: 16px;
            padding: 20px 24px;
            transition: all 0.2s ease-out;
        }

        .faq-item[open] {
            border-left: 3px solid var(--brand-500);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-main);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

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

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8125rem;
            color: var(--text-muted);
            transition: transform 0.2s ease-out;
        }

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

        .faq-item .faq-answer {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.75;
            padding-top: 14px;
            margin-top: 14px;
            border-top: 1px solid var(--divider-color);
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 90px 0;
            background: var(--bg-body);
        }

        .cta-banner {
            background: linear-gradient(135deg, var(--brand-700) 0%, var(--brand-500) 100%);
            border-radius: 20px;
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-banner h2 {
            color: #fff;
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1rem;
            margin-bottom: 28px;
        }

        .btn-white {
            background: #fff;
            color: var(--brand-700);
            font-weight: 700;
            font-size: 0.9375rem;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s ease-out;
            cursor: pointer;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            background: var(--brand-50);
        }

        .btn-white-outline {
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(255, 255, 255, 0.7);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all 0.2s ease-out;
            cursor: pointer;
            margin-left: 12px;
        }

        .btn-white-outline:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ---------- 页脚 ---------- */
        .site-footer {
            background: var(--bg-dark);
            color: #A0B2C4;
            padding: 64px 0 0;
        }

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

        .footer-brand .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand .footer-logo .logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
        }

        .footer-brand p {
            font-size: 0.875rem;
            line-height: 1.75;
            color: #8A9BAB;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #A0B2C4;
            font-size: 0.9rem;
            transition: all 0.2s ease-out;
        }

        .footer-social a:hover {
            background: rgba(77, 163, 255, 0.15);
            color: #4DA3FF;
            border-color: rgba(77, 163, 255, 0.3);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

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

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

        .footer-col ul li a {
            color: #8A9BAB;
            font-size: 0.875rem;
            transition: all 0.2s ease-out;
        }

        .footer-col ul li a:hover {
            color: #4DA3FF;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: #8A9BAB;
            font-size: 0.875rem;
            margin-bottom: 12px;
        }

        .footer-contact li i {
            color: #4DA3FF;
            margin-top: 4px;
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            font-size: 0.8125rem;
            color: #6B7D8E;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ---------- 响应式 ---------- */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 18px;
            }
            .nav-search {
                width: 150px;
            }
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-visual {
                display: none;
            }
            .achievements-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .solution-row {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .solution-row.reverse .solution-text {
                order: 1;
            }
            .solution-row.reverse .solution-visual {
                order: 2;
            }
        }

        @media (max-width: 768px) {
            .nav-links,
            .nav-search,
            .btn-login {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .hero {
                min-height: 520px;
                padding-top: 76px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-layout {
                grid-template-columns: 1fr;
            }
            .cta-banner {
                padding: 40px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 60px 0;
            }
            .achieve-grid {
                grid-template-columns: 1fr;
            }
            .news-list-item img {
                width: 90px;
                height: 80px;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 1.75rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-number {
                font-size: 1.75rem;
            }
            .solution-row {
                gap: 16px;
            }
            .solution-visual img {
                height: 220px;
            }
            .news-list-item {
                flex-direction: column;
            }
            .news-list-item img {
                width: 100%;
                height: 160px;
            }
            .news-featured-cover {
                height: 180px;
            }
            .cta-actions {
                display: flex;
                flex-direction: column;
                gap: 12px;
                align-items: center;
            }
            .btn-white-outline {
                margin-left: 0;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }

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

/* roulang page: category1 */
:root{
  --brand-50:#EFF6FF;--brand-100:#DBEAFF;--brand-500:#2D8CF0;--brand-600:#1A7AE0;--brand-700:#1060B8;--brand-900:#0A3D78;
  --accent-400:#FF9440;--accent-500:#FF7A1A;--accent-600:#E56500;
  --bg-page:#F7F9FC;--bg-white:#FFFFFF;--bg-dark:#16242F;
  --text-main:#1A2B3C;--text-second:#5A6B7C;--text-weak:#8A9BAB;
  --border-color:#E3EAF2;--divider:#EEF2F7;
  --radius-card:12px;--radius-btn:8px;
  --shadow-default:0 1px 3px rgba(26,43,60,0.06);
  --shadow-hover:0 8px 24px rgba(45,140,240,0.10);
  --shadow-nav:0 12px 32px rgba(26,43,60,0.12);
  --font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font-family);background:var(--bg-page);color:var(--text-main);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input{font-family:inherit}
.container{max-width:1280px;margin:0 auto;padding:0 16px}
@media(min-width:768px){.container{padding:0 32px}}
/* 固定导航 */
.site-header{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(255,255,255,.55);backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);border-bottom:1px solid rgba(255,255,255,.4);box-shadow:0 4px 20px rgba(26,43,60,.06);transition:background .2s ease,box-shadow .2s ease,border-color .2s ease}
.site-header.scrolled{background:rgba(255,255,255,.95);border-color:rgba(26,43,60,.08);box-shadow:0 4px 20px rgba(26,43,60,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.site-logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--brand-700);line-height:1.2;white-space:nowrap}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--brand-500);color:#fff;border-radius:8px;font-weight:800;font-size:.9rem;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none}
.nav-link{position:relative;font-size:.9375rem;font-weight:500;color:var(--brand-700);padding:8px 2px;transition:color .2s}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--brand-500);border-radius:2px;transition:width .2s ease-out}
.nav-link:hover,.nav-link.active{color:var(--brand-500)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:16px}
.nav-search{display:flex;align-items:center;gap:8px;background:#F0F4F9;border-radius:20px;padding:8px 14px;width:200px;transition:box-shadow .2s,background .2s}
.nav-search:focus-within{background:#fff;box-shadow:0 0 0 2px rgba(45,140,240,.25)}
.nav-search i{color:var(--text-weak);font-size:.8125rem}
.nav-search input{background:transparent;border:none;outline:none;font-size:.875rem;color:var(--text-main);width:100%}
.nav-search input::placeholder{color:var(--text-weak)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;background:var(--accent-500);color:#fff;font-size:.875rem;font-weight:600;padding:10px 20px;border-radius:var(--radius-btn);transition:background .2s,transform .2s,box-shadow .2s}
.btn-login:hover{background:var(--accent-400);transform:translateY(-2px);box-shadow:0 6px 16px rgba(255,122,26,.3)}
.btn-login:active{transform:translateY(-1px)}
.nav-toggle{display:none;font-size:1.25rem;color:var(--text-main);padding:8px;border-radius:8px}
.nav-toggle:hover{background:var(--brand-50)}
/* Hero */
.category-hero{position:relative;padding:140px 0 70px;background:linear-gradient(180deg,#EFF6FF 0%,#F7F9FC 100%);overflow:hidden}
.category-hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.18;pointer-events:none}
.category-hero::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(90deg,rgba(247,249,252,.96) 40%,rgba(247,249,252,.55) 100%);z-index:0}
.category-hero .container{position:relative;z-index:1;display:flex;align-items:center;gap:48px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:.875rem;color:var(--text-weak);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-second);transition:color .2s}
.breadcrumb a:hover{color:var(--brand-500)}
.breadcrumb .sep{color:var(--text-weak);font-size:.75rem}
.hero-cat-label{display:inline-flex;align-items:center;gap:8px;background:var(--brand-100);color:var(--brand-700);font-size:.8125rem;font-weight:600;padding:6px 16px;border-radius:20px;margin-bottom:18px}
.hero-cat-label i{font-size:.75rem}
.category-hero h1{font-size:clamp(2rem,4vw,3rem);font-weight:700;line-height:1.2;color:var(--text-main);letter-spacing:-.01em;margin-bottom:16px}
.category-hero .hero-desc{font-size:1.0625rem;color:var(--text-second);max-width:560px;line-height:1.8;margin-bottom:24px}
.hero-stats{display:flex;gap:32px;margin-top:28px;flex-wrap:wrap}
.hero-stat{text-align:left}
.hero-stat .num{font-size:1.5rem;font-weight:700;color:var(--brand-600);font-feature-settings:"tnum";line-height:1.2}
.hero-stat .label{font-size:.8125rem;color:var(--text-weak);margin-top:2px}
.hero-visual{position:relative;flex-shrink:0;width:360px;height:240px;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-hover);display:none}
@media(min-width:1024px){.hero-visual{display:block}}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-visual .vis-card{position:absolute;bottom:16px;left:16px;right:16px;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);border-radius:12px;padding:14px 18px;display:flex;align-items:center;gap:12px}
.hero-visual .vis-card .ic{width:36px;height:36px;border-radius:10px;background:var(--brand-500);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0}
.hero-visual .vis-card .tx{font-size:.8125rem;color:var(--text-main);font-weight:600;line-height:1.4}
.hero-visual .vis-card .tx small{display:block;font-weight:400;color:var(--text-weak);font-size:.75rem}
/* 锚点导航 */
.anchor-nav{position:sticky;top:72px;z-index:30;background:var(--bg-white);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-default)}
.anchor-nav .container{display:flex;gap:8px;overflow-x:auto;padding-top:10px;padding-bottom:10px;scrollbar-width:none}
.anchor-nav .container::-webkit-scrollbar{display:none}
.anchor-chip{display:inline-flex;align-items:center;gap:6px;font-size:.875rem;font-weight:500;color:var(--text-second);padding:7px 18px;border-radius:20px;background:var(--bg-page);border:1px solid var(--border-color);white-space:nowrap;transition:all .2s}
.anchor-chip:hover{border-color:var(--brand-500);color:var(--brand-600)}
.anchor-chip.active{background:var(--brand-500);color:#fff;border-color:var(--brand-500)}
/* 主体 */
.main-wrap{display:flex;gap:40px;padding-top:56px;padding-bottom:56px;align-items:flex-start}
.content-main{width:100%;max-width:760px}
.content-side{width:100%;max-width:320px;flex-shrink:0}
@media(max-width:1023px){.main-wrap{flex-direction:column}.content-side{max-width:100%}}
/* 通用卡片 */
.card{background:var(--bg-white);border:1px solid var(--border-color);border-radius:var(--radius-card);box-shadow:var(--shadow-default);padding:24px;transition:box-shadow .2s,transform .2s,border-color .2s}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px);border-color:#BBD6F5}
.card-icon{width:44px;height:44px;border-radius:10px;background:var(--brand-50);color:var(--brand-600);display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
/* 区块标题 */
.section-title{font-size:1.5rem;font-weight:700;color:var(--text-main);margin-bottom:8px;letter-spacing:-.01em}
.section-sub{color:var(--text-second);font-size:.9375rem;margin-bottom:28px}
.section-tag{display:inline-flex;align-items:center;gap:6px;font-size:.8125rem;font-weight:600;color:var(--brand-600);background:var(--brand-50);padding:4px 14px;border-radius:16px;margin-bottom:14px}
/* 图文块 */
.feature-zone{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:8px}
.feature-card{background:var(--bg-white);border:1px solid var(--border-color);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-default);transition:box-shadow .2s,transform .2s;display:flex;flex-direction:column}
.feature-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.feature-img{width:100%;height:160px;object-fit:cover}
.feature-body{padding:20px}
.feature-body h3{font-size:1rem;font-weight:600;margin-bottom:6px;color:var(--text-main)}
.feature-body p{font-size:.875rem;color:var(--text-second);line-height:1.65}
/* 项目标签 */
.sport-tags{display:flex;flex-wrap:wrap;gap:10px}
.sport-tag{display:inline-flex;align-items:center;gap:6px;font-size:.875rem;font-weight:500;color:var(--text-main);background:var(--bg-white);border:1px solid var(--editor-border);border:1px solid var(--border-color);border-radius:20px;padding:8px 20px;transition:all .2s}
.sport-tag i{color:var(--brand-500);font-size:.75rem}
.sport-tag:hover{background:var(--brand-50);border-color:var(--brand-500);color:var(--brand-700)}
/* 流程步骤 */
.steps{display:flex;flex-direction:column;gap:16px;margin-top:8px}
.step{display:flex;gap:18px;align-items:flex-start;background:var(--bg-white);border:1px solid var(--border-color);border-radius:var(--radius-card);padding:22px;transition:box-shadow .2s,transform .2s}
.step:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.step-num{width:36px;height:36px;border-radius:50%;background:var(--brand-500);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.875rem;flex-shrink:0;font-feature-settings:"tnum"}
.step-body h4{font-size:1rem;font-weight:600;margin-bottom:2px}
.step-body p{font-size:.875rem;color:var(--text-second)}
@media(min-width:768px){.steps{display:grid;grid-template-columns:1fr 1fr;gap:20px}}
/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--bg-white);border:1px solid var(--border-color);border-radius:var(--radius-card);padding:20px 24px;transition:border-color .2s,box-shadow .2s;position:relative}
.faq-item[open]{border-color:var(--brand-500);box-shadow:var(--shadow-hover)}
.faq-item[open]::before{content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;background:var(--brand-500);border-radius:0 3px 3px 0}
.faq-item summary{font-size:1rem;font-weight:600;color:var(--text-main);cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{color:var(--text-weak);font-size:.875rem;transition:transform .2s}
.faq-item[open] summary i{transform:rotate(180deg);color:var(--brand-500)}
.faq-item .faq-answer{margin-top:12px;font-size:.875rem;color:var(--text-second);line-height:1.75}
/* 侧栏 */
.side-card{background:var(--bg-white);border:1px solid var(--border-color);border-radius:var(--radius-card);box-shadow:var(--shadow-default);padding:24px;margin-bottom:24px}
.side-card .sc-title{font-size:1rem;font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.side-card .sc-title i{color:var(--brand-500);font-size:.875rem}
.side-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.side-list li a{display:flex;align-items:center;gap:10px;font-size:.875rem;color:var(--text-second);padding:8px;border-radius:8px;transition:background .2s,color .2s}
.side-list li a:hover{background:var(--brand-50);color:var(--brand-600)}
.side-list li a i{font-size:.75rem;color:var(--brand-500);width:18px;text-align:center}
.side-banner{position:relative;border-radius:var(--radius-card);overflow:hidden;margin-bottom:24px}
.side-banner img{width:100%;height:180px;object-fit:cover}
.side-banner .banner-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,36,47,0) 30%,rgba(22,36,47,.85) 100%);display:flex;align-items:flex-end;padding:20px}
.side-banner .banner-text{color:#fff}
.side-banner .banner-text h4{font-size:1rem;font-weight:700;margin-bottom:4px}
.side-banner .banner-text p{font-size:.75rem;opacity:.85}
/* CTA */
.page-cta{padding:60px 0 80px}
.cta-box{background:linear-gradient(135deg,var(--brand-600),var(--brand-500));border-radius:20px;padding:56px 40px;text-align:center;position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;top:-60px;right:-60px;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta-box h2{color:#fff;font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;margin-bottom:12px}
.cta-box p{color:rgba(255,255,255,.9);font-size:1rem;margin-bottom:28px;max-width:560px;margin-left:auto;margin-right:auto}
.cta-box .btn-white{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--brand-700);font-size:.9375rem;font-weight:600;padding:14px 32px;border-radius:var(--radius-btn);transition:transform .2s,box-shadow .2s}
.cta-box .btn-white:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
/* 页脚 */
.site-footer{background:var(--bg-dark);color:#A0B2C4;padding:64px 0 24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:40px;margin-bottom:40px}
@media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.2fr}}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:#fff;margin-bottom:16px}
.footer-brand p{font-size:.875rem;line-height:1.7;opacity:.85;max-width:320px}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{width:36px;height:36px;border-radius:8px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;color:#A0B2C4;font-size:.9375rem;transition:background .2s,color .2s}
.footer-social a:hover{background:var(--brand-500);color:#fff}
.footer-col h4{color:#fff;font-size:.9375rem;font-weight:600;margin-bottom:16px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col ul li a{font-size:.875rem;color:#A0B2C4;transition:color .2s}
.footer-col ul li a:hover{color:#4DA3FF}
.footer-contact li{display:flex;align-items:center;gap:10px;font-size:.875rem}
.footer-contact i{width:20px;color:var(--brand-500);font-size:.8125rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;display:flex;flex-direction:column;gap:8px;align-items:center;justify-content:space-between;font-size:.8125rem;opacity:.7}
@media(min-width:768px){.footer-bottom{flex-direction:row}}
/* 移动导航 */
@media(max-width:767px){
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:24px 16px;box-shadow:var(--shadow-nav);border-top:1px solid var(--border-color)}
  .nav-links.show{display:flex}
  .nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .category-hero{padding:120px 0 48px}
  .hero-stats{gap:20px}
  .cta-box{padding:40px 24px}
  .feature-zone{grid-template-columns:1fr}
  .main-wrap{padding-top:32px}
}
@media(prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto!important}
}
.section-divider{height:1px;background:var(--divider);margin:40px 0}
/* 侧栏会员卡 */
.member-card{padding:24px;background:linear-gradient(135deg,var(--brand-50),#fff);text-align:center}
.member-card .mb-icon{width:52px;height:52px;border-radius:14px;background:var(--brand-500);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin:0 auto 14px}
.member-card h4{font-size:1rem;font-weight:700;margin-bottom:8px}
.member-card p{font-size:.8125rem;color:var(--text-second);margin-bottom:18px;line-height:1.6}
.member-card .btn-sm{display:inline-flex;background:var(--accent-500);color:#fff;font-size:.8125rem;font-weight:600;padding:9px 20px;border-radius:var(--radius-btn);transition:background .2s}
.member-card .btn-sm:hover{background:var(--accent-400)}

/* roulang page: article */
:root {
            --brand-50: #EFF6FF;
            --brand-100: #DBEAFF;
            --brand-500: #2D8CF0;
            --brand-600: #1A7AE0;
            --brand-700: #1060B8;
            --brand-900: #0A3D78;
            --accent-400: #FF9440;
            --accent-500: #FF7A1A;
            --accent-600: #E56500;
            --bg-page: #F7F9FC;
            --text-main: #1A2B3C;
            --text-second: #5A6B7C;
            --text-muted: #8A9BAB;
            --border-color: #E3EAF2;
            --divider: #EEF2F7;
            --dark-bg: #16242F;
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-sm: 0 1px 3px rgba(26,43,60,0.06);
            --shadow-hover: 0 8px 24px rgba(45,140,240,0.10);
            --shadow-nav: 0 12px 32px rgba(26,43,60,0.12);
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            font-feature-settings: "tnum";
        }

        img {
            max-width: 100%;
            display: block;
        }
        a { text-decoration: none; color: inherit; }
        button { cursor: pointer; border: none; background: none; }
        input { outline: none; border: none; }
        ul, ol { list-style: none; }

        html { scroll-behavior: smooth; }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 16px;
        }

        @media (min-width: 768px) {
            .container { padding: 0 32px; }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(255,255,255,0.55);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(255,255,255,0.4);
            box-shadow: 0 4px 20px rgba(26,43,60,0.06);
            transition: background 0.2s ease-out, border-color 0.2s ease-out, box-shadow 0.2s ease-out;
        }

        .site-header.scrolled {
            background: rgba(255,255,255,0.95);
            border-bottom: 1px solid rgba(26,43,60,0.08);
            box-shadow: 0 4px 20px rgba(26,43,60,0.08);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            color: var(--brand-700);
            font-size: 1.125rem;
            white-space: nowrap;
            line-height: 1.2;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            color: #fff;
            border-radius: 10px;
            font-size: 0.75rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 28px;
        }

        .nav-link {
            position: relative;
            font-size: 0.9375rem;
            color: var(--text-main);
            font-weight: 500;
            padding: 6px 2px;
            transition: color 0.2s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand-500);
            border-radius: 2px;
            transition: width 0.25s ease-out;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--brand-500);
        }

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

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.8);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 8px 14px;
            width: 200px;
            transition: all 0.2s ease;
        }

        .nav-search:focus-within {
            border-color: var(--brand-500);
            box-shadow: 0 0 0 3px rgba(45,140,240,0.15);
            background: #fff;
        }

        .nav-search i {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        .nav-search input {
            background: transparent;
            font-size: 0.875rem;
            width: 100%;
            color: var(--text-main);
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-500);
            color: #fff;
            font-size: 0.875rem;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: 8px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: var(--accent-400);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(255,122,26,0.25);
        }

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

        .nav-toggle {
            display: none;
            font-size: 1.25rem;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
        }

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

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            box-shadow: var(--shadow-nav);
            padding: 12px 0 24px;
            z-index: 49;
            border-bottom: 1px solid var(--border-color);
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-main);
            transition: all 0.2s ease;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--brand-500);
            background: var(--brand-50);
        }

        .mobile-menu .btn-login {
            margin: 16px 24px 8px;
            text-align: center;
        }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            padding: 150px 0 56px;
            background: linear-gradient(180deg, var(--brand-50) 0%, #ffffff 100%);
            border-bottom: 1px solid var(--divider);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            color: var(--brand-500);
            transition: color 0.2s;
        }

        .breadcrumb a:hover {
            color: var(--brand-600);
        }

        .breadcrumb i {
            font-size: 0.6875rem;
            color: var(--text-muted);
        }

        .breadcrumb .current {
            color: var(--text-muted);
            max-width: 360px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-title {
            font-size: clamp(1.625rem, 3.5vw, 2.375rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            max-width: 780px;
            letter-spacing: -0.01em;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 22px;
            font-size: 0.875rem;
            color: var(--text-muted);
        }

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

        .article-meta .chip {
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 0.8125rem;
            font-weight: 500;
            padding: 3px 14px;
            border-radius: 20px;
        }

        /* ===== 正文区 ===== */
        .article-main {
            padding: 48px 0 64px;
            background: #fff;
        }

        .article-body {
            max-width: 760px;
            margin: 0 auto;
        }

        .article-body .content {
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-main);
            word-wrap: break-word;
        }

        .article-body .content p {
            margin-bottom: 24px;
        }

        .article-body .content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 44px;
            margin-bottom: 16px;
            padding-left: 16px;
            border-left: 3px solid var(--brand-500);
            line-height: 1.4;
        }

        .article-body .content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 14px;
            line-height: 1.5;
        }

        .article-body .content h4 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 12px;
        }

        .article-body .content img {
            border-radius: 12px;
            margin: 32px 0;
            box-shadow: var(--shadow-sm);
            height: auto;
        }

        .article-body .content blockquote {
            border-left: 4px solid var(--brand-500);
            background: var(--brand-50);
            padding: 18px 24px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
            color: var(--text-second);
            font-style: italic;
        }

        .article-body .content a {
            color: var(--brand-500);
            text-decoration: underline;
            text-underline-offset: 4px;
            transition: color 0.2s;
        }

        .article-body .content a:hover {
            color: var(--brand-600);
        }

        .article-body .content ul {
            margin: 0 0 24px 24px;
            list-style: disc;
        }

        .article-body .content ol {
            margin: 0 0 24px 24px;
            list-style: decimal;
        }

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

        .article-body .content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 0.875rem;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .article-body .content table th,
        .article-body .content table td {
            border: 1px solid var(--border-color);
            padding: 12px 16px;
            text-align: left;
        }

        .article-body .content table th {
            background: var(--brand-50);
            font-weight: 600;
        }

        .article-body .content code {
            background: var(--bg-page);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 2px 8px;
            font-size: 0.875rem;
            font-family: Consolas, Monaco, "Courier New", monospace;
        }

        .article-body .content pre {
            background: #1a2b3c;
            color: #e8eef5;
            border-radius: 12px;
            padding: 20px 24px;
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.875rem;
            line-height: 1.7;
        }

        .article-body .content pre code {
            background: transparent;
            border: none;
            padding: 0;
            color: inherit;
        }

        /* ===== 文末标签 ===== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--divider);
        }

        .tag-chip {
            background: var(--bg-page);
            border: 1px solid var(--border-color);
            color: var(--text-second);
            font-size: 0.8125rem;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: 20px;
            transition: all 0.2s ease;
        }

        .tag-chip:hover {
            background: var(--brand-50);
            border-color: var(--brand-500);
            color: var(--brand-600);
        }

        /* ===== 分享 ===== */
        .share-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 28px;
            padding-top: 24px;
            border-top: 1px solid var(--divider);
            flex-wrap: wrap;
        }

        .share-row>span {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        .share-row a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-second);
            padding: 8px 18px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .share-row a:hover {
            border-color: var(--brand-500);
            color: var(--brand-600);
            background: var(--brand-50);
        }

        /* ===== 上一篇/下一篇 ===== */
        .post-nav {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .post-nav a {
            flex: 1;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 12px 20px;
            font-size: 0.875rem;
            color: var(--text-second);
            transition: all 0.2s ease;
            max-width: 320px;
            min-width: 200px;
        }

        .post-nav a:hover {
            border-color: var(--brand-500);
            color: var(--brand-600);
            background: var(--brand-50);
        }

        .post-nav .next-post {
            margin-left: auto;
            justify-content: flex-end;
            text-align: right;
        }

        .post-nav .prev-post i {
            font-size: 0.75rem;
        }

        .post-nav .next-post i {
            font-size: 0.75rem;
        }

        /* ===== 返回栏目 ===== */
        .back-row {
            display: flex;
            align-items: center;
            margin-top: 32px;
        }

        .back-row a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9375rem;
            color: var(--brand-500);
            font-weight: 500;
            transition: gap 0.2s ease;
        }

        .back-row a:hover {
            gap: 12px;
        }

        /* ===== 内容未找到 ===== */
        .not-found {
            text-align: center;
            padding: 72px 24px;
        }

        .not-found .nf-icon {
            width: 72px;
            height: 72px;
            border-radius: 20px;
            background: var(--brand-50);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
        }

        .not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-muted);
            font-size: 0.9375rem;
        }

        .not-found a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 24px;
            color: var(--brand-500);
            font-weight: 600;
            font-size: 0.9375rem;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 56px 0 64px;
            background: var(--bg-page);
            border-top: 1px solid var(--divider);
        }

        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .section-header h2 {
            font-size: 1.625rem;
            font-weight: 700;
            line-height: 1.3;
        }

        .section-header .view-all {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.875rem;
            color: var(--brand-500);
            font-weight: 500;
            transition: gap 0.2s;
        }

        .section-header .view-all:hover {
            gap: 10px;
        }

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

        .related-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all 0.2s ease;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: #BBD6F5;
        }

        .related-card .thumb {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .related-card .related-body {
            padding: 20px;
            flex: 1;
        }

        .related-card h3 {
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-date {
            font-size: 0.8125rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 56px 0 80px;
            background: var(--bg-page);
        }

        .cta-wrapper {
            max-width: 760px;
            margin: 0 auto;
            background: linear-gradient(135deg, var(--brand-600) 0%, var(--brand-500) 100%);
            border-radius: 20px;
            padding: 48px 56px;
            text-align: center;
        }

        .cta-wrapper h2 {
            color: #fff;
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .cta-wrapper p {
            color: rgba(255,255,255,0.85);
            font-size: 1rem;
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--brand-700);
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 13px 36px;
            border-radius: 8px;
            transition: all 0.2s ease;
        }

        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark-bg);
            padding: 64px 0 0;
            color: #A0B2C4;
        }

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

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.125rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-logo .logo-mark {
            background: linear-gradient(135deg, var(--brand-400, #4DA3FF), var(--brand-500));
        }

        .footer-brand p {
            font-size: 0.875rem;
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 320px;
            color: #A0B2C4;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.08);
            border-radius: 10px;
            color: #A0B2C4;
            font-size: 1rem;
            transition: all 0.2s ease;
        }

        .footer-social a:hover {
            background: var(--brand-500);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col a {
            font-size: 0.875rem;
            color: #A0B2C4;
            transition: color 0.2s ease;
        }

        .footer-col a:hover {
            color: #4DA3FF;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.875rem;
            color: #A0B2C4;
        }

        .footer-contact i {
            width: 16px;
            color: var(--brand-500);
            font-size: 0.875rem;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 0.8125rem;
            color: #7A8B9C;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .nav-links { gap: 18px; }
            .nav-search { width: 150px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-search { display: none; }
            .nav-toggle { display: block; }

            .article-hero { padding: 120px 0 40px; }
            .article-title { font-size: 1.5rem; }
            .article-meta { gap: 12px; }

            .related-grid { grid-template-columns: 1fr; }
            .post-nav { flex-direction: column; }
            .post-nav a { max-width: 100%; }

            .cta-wrapper { padding: 36px 24px; }
            .cta-wrapper h2 { font-size: 1.5rem; }

            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
            .section-header { flex-direction: column; align-items: flex-start; gap: 12px; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 12px; }
            .nav-inner { height: 64px; }
            .site-logo { font-size: 0.9375rem; }
            .logo-mark { width: 30px; height: 30px; font-size: 0.625rem; }
            .btn-login { padding: 8px 14px; font-size: 0.8125rem; }
            .mobile-menu { top: 64px; }
            .article-hero { padding: 105px 0 32px; }
            .share-row a { padding: 8px 12px; font-size: 0.8125rem; }
            .cta-wrapper { border-radius: 16px; padding: 28px 20px; }
            .cta-wrapper h2 { font-size: 1.375rem; }
            .cta-wrapper p { font-size: 0.9375rem; }
            .footer-bottom { font-size: 0.75rem; }
        }

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

/* roulang page: category2 */
:root {
            --brand-50: #EFF6FF;
            --brand-100: #DBEAFF;
            --brand-500: #2D8CF0;
            --brand-600: #1A7AE0;
            --brand-700: #1060B8;
            --brand-900: #0A3D78;
            --accent-400: #FF9440;
            --accent-500: #FF7A1A;
            --accent-600: #E56500;
            --bg: #F7F9FC;
            --white: #FFFFFF;
            --text-primary: #1A2B3C;
            --text-secondary: #5A6B7C;
            --text-muted: #8A9BAB;
            --border: #E3EAF2;
            --divider: #EEF2F7;
            --dark-bg: #16242F;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(26, 43, 60, 0.06);
            --shadow-md: 0 8px 24px rgba(45, 140, 240, 0.10);
            --shadow-lg: 0 12px 32px rgba(26, 43, 60, 0.12);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

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

        input {
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.4);
            box-shadow: 0 4px 20px rgba(26, 43, 60, 0.06);
            transition: background 0.2s ease-out, box-shadow 0.2s ease-out;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.95);
            border-bottom-color: rgba(26, 43, 60, 0.08);
            box-shadow: 0 4px 20px rgba(26, 43, 60, 0.10);
        }

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

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--brand-700);
            white-space: nowrap;
            transition: opacity 0.2s;
        }

        .site-logo:hover {
            opacity: 0.85;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            color: #fff;
            border-radius: 10px;
            font-size: 0.875rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 8px;
            transition: color 0.2s;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--brand-500);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.2s ease-out;
        }

        .nav-link:hover {
            color: var(--brand-500);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

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

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(26, 43, 60, 0.04);
            border-radius: 10px;
            padding: 0 12px;
            height: 38px;
            width: 200px;
            border: 1px solid transparent;
            transition: background 0.2s, border 0.2s, box-shadow 0.2s;
        }

        .nav-search i {
            font-size: 0.8125rem;
            color: var(--text-muted);
            margin-right: 8px;
        }

        .nav-search input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 0.8125rem;
            color: var(--text-primary);
            width: 100%;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-search:focus-within {
            background: #fff;
            border-color: var(--brand-500);
            box-shadow: 0 0 0 3px rgba(45, 140, 240, 0.15);
        }

        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-500);
            color: #fff;
            font-size: 0.875rem;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 8px;
            height: 38px;
            transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
            box-shadow: 0 2px 8px rgba(255, 122, 26, 0.25);
            white-space: nowrap;
        }

        .btn-login:hover {
            background: var(--accent-400);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(255, 122, 26, 0.3);
        }

        .btn-login:active {
            transform: translateY(0);
            background: var(--accent-600);
        }

        .btn-login:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(255, 122, 26, 0.4);
        }

        .nav-toggle {
            display: none;
            font-size: 1.25rem;
            color: var(--text-primary);
            padding: 8px;
            border-radius: 8px;
        }

        /* ---------- Section utilities ---------- */
        .section {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }

        .section-tag {
            display: inline-block;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

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

        /* ---------- Category Hero ---------- */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, var(--brand-50) 0%, #ffffff 100%);
            padding: 128px 0 0;
            min-height: 300px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--divider);
            overflow: hidden;
        }

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

        .category-hero .container {
            position: relative;
            z-index: 1;
        }

        .category-hero-inner {
            max-width: 640px;
            padding: 32px 0 48px;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border);
            color: var(--brand-700);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
            backdrop-filter: blur(8px);
        }

        .category-hero h1 {
            font-size: clamp(1.75rem, 3.5vw, 2.5rem);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .category-hero .hero-sub {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .hero-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 20px;
        }

        .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 0.875rem;
        }

        .hero-meta-item i {
            color: var(--brand-500);
            font-size: 1rem;
        }

        /* ---------- Feature Cards ---------- */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.2s ease-out, transform 0.2s ease-out, border-color 0.2s;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--brand-100);
        }

        .feature-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: var(--brand-50);
            border-radius: 12px;
            font-size: 1.25rem;
            color: var(--brand-600);
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ---------- Benefit Showcase ---------- */
        .benefit-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 64px;
        }

        .benefit-row:last-child {
            margin-bottom: 0;
        }

        .benefit-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .benefit-image img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }

        .benefit-text .mini-tag {
            display: inline-block;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 16px;
            margin-bottom: 10px;
        }

        .benefit-text h3 {
            font-size: 1.375rem;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .benefit-text p {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .benefit-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .benefit-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.875rem;
            color: var(--text-primary);
        }

        .benefit-list li i {
            color: var(--brand-500);
            font-size: 0.9375rem;
            margin-top: 4px;
        }

        /* ---------- Scenarios ---------- */
        .scenarios {
            background: var(--white);
            border-top: 1px solid var(--divider);
            border-bottom: 1px solid var(--divider);
        }

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

        .scenario-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: box-shadow 0.2s, transform 0.2s;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--brand-100);
        }

        .scenario-icon {
            font-size: 1.75rem;
            margin-bottom: 14px;
        }

        .scenario-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .scenario-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ---------- Steps ---------- */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .step-item {
            text-align: center;
            padding: 32px 24px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            position: relative;
            transition: box-shadow 0.2s, transform 0.2s;
        }

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

        .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            margin: 0 auto 16px;
            background: var(--brand-50);
            color: var(--brand-600);
            font-size: 1rem;
            font-weight: 700;
            border-radius: 50%;
        }

        .step-item h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

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

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow 0.2s, border-color 0.2s;
        }

        .faq-item:hover {
            border-color: var(--brand-100);
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 0.9375rem;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            transition: color 0.2s;
        }

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

        .faq-item summary i {
            font-size: 0.8125rem;
            color: var(--text-muted);
            transition: transform 0.2s;
        }

        .faq-item[open] summary {
            color: var(--brand-600);
        }

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

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ---------- CTA ---------- */
        .cta-banner {
            background: linear-gradient(135deg, var(--brand-600), var(--brand-500));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }

        .cta-banner h2 {
            font-size: clamp(1.375rem, 2.5vw, 1.875rem);
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            font-size: 0.9375rem;
            opacity: 0.9;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--brand-700);
            font-size: 0.9375rem;
            font-weight: 600;
            padding: 12px 32px;
            border-radius: 8px;
            transition: transform 0.2s, box-shadow 0.2s;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        .cta-banner .btn-white:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 2px;
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: var(--dark-bg);
            color: #A0B2C4;
            padding-top: 64px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.125rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-logo .logo-mark {
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
        }

        .footer-brand p {
            font-size: 0.875rem;
            line-height: 1.7;
            margin-bottom: 20px;
            color: #8A9BAB;
        }

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

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            color: #A0B2C4;
            font-size: 0.9375rem;
            transition: background 0.2s, color 0.2s;
        }

        .footer-social a:hover {
            background: rgba(45, 140, 240, 0.3);
            color: #fff;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.9375rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 0.875rem;
            color: #8A9BAB;
            transition: color 0.2s;
        }

        .footer-col ul a:hover {
            color: #4DA3FF;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: #8A9BAB;
        }

        .footer-contact i {
            color: #4DA3FF;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.8125rem;
            color: #667A8C;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 1024px) {
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }

            .nav-search {
                width: 140px;
            }

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

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

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

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

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px 16px;
                gap: 4px;
                box-shadow: 0 12px 32px rgba(26, 43, 60, 0.12);
                border-radius: 0 0 16px 16px;
            }

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

            .nav-link {
                padding: 14px 16px;
                text-align: center;
                width: 100%;
                font-size: 1rem;
            }

            .nav-link::after {
                display: none;
            }

            .nav-link.active {
                background: var(--brand-50);
                border-radius: 10px;
            }

            .nav-search {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .btn-login {
                padding: 8px 14px;
                font-size: 0.8125rem;
            }

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

            .category-hero {
                padding-top: 96px;
                min-height: 260px;
            }

            .category-hero-inner {
                padding: 24px 0 36px;
            }

            .benefit-row {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 40px;
            }

            .benefit-image img {
                height: 200px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

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

            .cta-banner {
                padding: 40px 24px;
            }
        }

        @media (max-width: 520px) {
            .section-head h2 {
                font-size: 1.375rem;
            }

            .hero-meta {
                gap: 12px;
            }

            .brand-text {
                display: none;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }