/* roulang page: index */
:root {
            --primary: #10B981;
            --primary-dark: #047A68;
            --primary-grad: linear-gradient(135deg, #10B981, #047A68);
            --accent: #F5A623;
            --nav-bg: #0D1F19;
            --nav-accent: #34D399;
            --bg: #F6F8F7;
            --card-bg: #FFFFFF;
            --border: #E4E9E7;
            --text: #12201C;
            --text-secondary: #5B6E67;
            --text-weak: #94A3A0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow: 0 4px 14px rgba(13, 45, 33, 0.07);
            --shadow-hover: 0 12px 32px rgba(13, 45, 33, 0.12);
            --shadow-cta: 0 10px 24px rgba(16, 185, 129, 0.38);
            --space-desktop: 96px;
            --space-mobile: 56px;
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-dark);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 左侧导航 */
        .app-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: 260px;
            height: 100vh;
            background: var(--nav-bg);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform 0.3s ease;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--primary-grad);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .logo-text .grad {
            background: linear-gradient(135deg, #34D399, #F5A623);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-menu {
            flex: 1;
            padding: 24px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.72);
            font-size: 15px;
            font-weight: 500;
            transition: all 0.2s ease;
            position: relative;
            border-left: 3px solid transparent;
        }
        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .nav-item.active {
            background: rgba(255, 255, 255, 0.08);
            color: var(--nav-accent);
            border-left-color: var(--nav-accent);
            font-weight: 600;
        }
        .nav-footer {
            padding: 20px 24px 24px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
            line-height: 1.6;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .nav-footer strong {
            color: rgba(255, 255, 255, 0.5);
            font-weight: 500;
        }
        /* 移动端顶部栏 */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--nav-bg);
            z-index: 1001;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 800;
            font-size: 17px;
        }
        .mobile-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            font-size: 16px;
        }
        .hamburger-btn {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            background: rgba(255, 255, 255, 0.08);
            transition: background 0.2s;
        }
        .hamburger-btn:hover {
            background: rgba(255, 255, 255, 0.14);
        }
        /* 抽屉 */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1100;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .drawer-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        .drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: var(--nav-bg);
            z-index: 1101;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .drawer.active {
            transform: translateX(0);
        }
        .drawer .nav-menu {
            flex: 1;
            padding: 20px 12px;
        }
        /* 主内容 */
        .main-content {
            margin-left: 260px;
            min-height: 100vh;
        }
        /* Hero */
        .hero {
            position: relative;
            padding: 80px 24px 80px;
            background: linear-gradient(135deg, #f0f7f4, #e6f2ed);
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -40px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero .container {
            display: grid;
            grid-template-columns: 58% 42%;
            gap: 48px;
            align-items: center;
            max-width: 1200px;
        }
        .hero-left {
            position: relative;
            z-index: 2;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 20px;
        }
        .hero-tag i {
            font-size: 12px;
        }
        .hero h1 {
            font-size: 44px;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero h1 .highlight {
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 480px;
        }
        .hero-ctas {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-grad);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-cta);
            transition: all 0.25s ease;
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 32px rgba(16, 185, 129, 0.45);
            color: #fff;
        }
        .btn-primary:focus {
            outline: 3px solid rgba(16, 185, 129, 0.35);
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary-dark);
            font-size: 15px;
            font-weight: 600;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--primary);
            transition: all 0.25s ease;
        }
        .btn-secondary:hover {
            background: rgba(16, 185, 129, 0.08);
            color: var(--primary-dark);
        }
        .btn-secondary:focus {
            outline: 3px solid rgba(16, 185, 129, 0.25);
            outline-offset: 2px;
        }
        .hero-trust {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            list-style: none;
        }
        .hero-trust li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .hero-trust li i {
            color: var(--primary);
            font-size: 15px;
        }
        .hero-right {
            position: relative;
            z-index: 2;
        }
        .hero-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 24px 48px rgba(13, 45, 33, 0.18);
            min-height: 380px;
            display: flex;
            align-items: flex-end;
        }
        .hero-card-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(0, 0, 0, 0.7) 100%);
        }
        .hero-card-content {
            position: relative;
            z-index: 2;
            padding: 32px;
            color: #fff;
        }
        .hero-card-tag {
            display: inline-block;
            background: rgba(245, 166, 35, 0.9);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .hero-card-content h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .hero-card-content p {
            font-size: 14px;
            opacity: 0.85;
        }
        .hero-badge {
            position: absolute;
            top: 24px;
            right: 24px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            text-align: center;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
            z-index: 3;
        }
        .badge-number {
            display: block;
            font-size: 32px;
            font-weight: 800;
            line-height: 1.1;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .badge-icon {
            color: var(--accent);
            font-size: 14px;
            display: block;
            margin: 4px auto 2px;
        }
        .badge-label {
            font-size: 12px;
            color: var(--text-secondary);
            display: block;
        }
        /* 通用板块 */
        .section {
            padding: var(--space-desktop) 24px;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 40px;
            gap: 20px;
            flex-wrap: wrap;
        }
        .section-header h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        .section-header .sub {
            color: var(--text-secondary);
            font-size: 15px;
            margin-top: 8px;
            max-width: 480px;
        }
        .view-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-dark);
            padding: 8px 16px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: #fff;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .view-more:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateX(2px);
        }
        /* 资讯列表 */
        .news-section {
            padding: var(--space-desktop) 24px;
            background: #fff;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.25s ease;
            box-shadow: var(--shadow);
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }
        .news-card-link {
            display: flex;
            height: 100%;
            color: var(--text);
        }
        .news-card-link:hover {
            color: var(--text);
        }
        .news-thumb {
            width: 180px;
            min-height: 140px;
            flex-shrink: 0;
            background: var(--primary-grad);
            position: relative;
            overflow: hidden;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .news-card-body {
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-badge {
            display: inline-flex;
            align-items: center;
            align-self: flex-start;
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .news-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
            margin-bottom: 10px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-weak);
            margin-top: auto;
        }
        .news-more {
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }
        .news-card:hover .news-more {
            gap: 8px;
        }
        /* 空态 */
        .empty-state {
            border: 2px dashed var(--border);
            border-radius: var(--radius-lg);
            padding: 60px 20px;
            text-align: center;
            grid-column: 1 / -1;
            background: #fafcfb;
        }
        .empty-state .empty-icon {
            font-size: 40px;
            color: var(--text-weak);
            margin-bottom: 12px;
        }
        .empty-state p {
            color: var(--text-secondary);
            font-size: 16px;
        }
        /* 卖点区 */
        .features-section {
            padding: var(--space-desktop) 24px;
        }
        .features-wrap {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 60px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .features-left {
            position: sticky;
            top: 40px;
            align-self: start;
        }
        .features-left h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .features-left p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            max-width: 360px;
        }
        .feature-item {
            display: flex;
            gap: 20px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border);
        }
        .feature-item:last-child {
            border-bottom: none;
        }
        .feature-num {
            font-size: 40px;
            font-weight: 800;
            line-height: 1;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            flex-shrink: 0;
            width: 52px;
        }
        .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-grad);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            transition: transform 0.2s ease;
        }
        .feature-item:hover .feature-icon {
            transform: rotate(3deg);
        }
        .feature-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .feature-content p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }
        /* 演示区 */
        .how-section {
            padding: var(--space-desktop) 24px;
            background: #fff;
        }
        .how-section .container {
            max-width: 900px;
        }
        .how-section .section-header {
            text-align: center;
            justify-content: center;
        }
        .timeline {
            position: relative;
            padding: 20px 0;
        }
        .timeline::before {
            content: "";
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary-grad);
            transform: translateX(-50%);
            border-radius: 3px;
        }
        .timeline-item {
            position: relative;
            width: 50%;
            padding: 0 40px 48px;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-item::before {
            content: "";
            position: absolute;
            top: 6px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--primary-grad);
            border: 3px solid var(--accent);
            z-index: 2;
        }
        .timeline-item:nth-child(odd)::before {
            right: -8px;
        }
        .timeline-item:nth-child(even)::before {
            left: -8px;
        }
        .timeline-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow);
            transition: all 0.25s ease;
        }
        .timeline-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .timeline-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .timeline-item:nth-child(odd) .timeline-card h3 {
            justify-content: flex-end;
        }
        .timeline-card h3 span {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--primary-grad);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .timeline-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }
        /* 证据区 */
        .evidence-section {
            padding: var(--space-desktop) 24px;
            background: var(--nav-bg);
            position: relative;
            overflow: hidden;
        }
        .evidence-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .evidence-section .container {
            position: relative;
            z-index: 2;
            max-width: 1000px;
        }
        .evidence-section h2 {
            color: #fff;
            text-align: center;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .evidence-section .sub {
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 15px;
            margin-bottom: 48px;
        }
        .evidence-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .evidence-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            backdrop-filter: blur(4px);
            transition: all 0.25s ease;
        }
        .evidence-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .evidence-card .num {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.1;
            background: linear-gradient(135deg, #34D399, #F5A623);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
        }
        .evidence-card .label {
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            font-weight: 500;
        }
        /* 价格区 */
        .plans-section {
            padding: var(--space-desktop) 24px;
            background: #fff;
        }
        .plans-section .section-header {
            text-align: center;
            justify-content: center;
        }
        .plans-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 1080px;
            margin: 0 auto;
            align-items: stretch;
        }
        .plan-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            position: relative;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
        }
        .plan-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .plan-card.recommended {
            background: var(--primary-grad);
            border-color: transparent;
            color: #fff;
            transform: scale(1.03);
            box-shadow: 0 16px 40px rgba(16, 185, 129, 0.25);
            height: calc(100% + 24px);
            margin-top: -12px;
        }
        .plan-card.recommended:hover {
            transform: scale(1.03) translateY(-4px);
        }
        .plan-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }
        .plan-name {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .plan-price {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.2;
            margin: 16px 0 20px;
        }
        .plan-price .unit {
            font-size: 16px;
            font-weight: 400;
            color: var(--text-weak);
        }
        .plan-card.recommended .plan-price .unit {
            color: rgba(255, 255, 255, 0.7);
        }
        .plan-features {
            list-style: none;
            margin-bottom: 32px;
            flex: 1;
        }
        .plan-features li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            padding: 8px 0;
            color: var(--text-secondary);
        }
        .plan-card.recommended .plan-features li {
            color: rgba(255, 255, 255, 0.9);
        }
        .plan-features li i {
            color: var(--primary);
            font-size: 14px;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .plan-card.recommended .plan-features li i {
            color: var(--accent);
        }
        .plan-btn {
            display: block;
            text-align: center;
            padding: 13px 20px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: all 0.25s ease;
            border: 1.5px solid var(--primary);
            color: var(--primary-dark);
            background: transparent;
        }
        .plan-btn:hover {
            background: rgba(16, 185, 129, 0.08);
        }
        .plan-card.recommended .plan-btn {
            background: #fff;
            color: var(--primary-dark);
            border-color: #fff;
        }
        .plan-card.recommended .plan-btn:hover {
            background: rgba(255, 255, 255, 0.9);
        }
        /* FAQ */
        .faq-section {
            padding: var(--space-desktop) 24px;
        }
        .faq-section .container {
            max-width: 820px;
        }
        .faq-section .section-header {
            text-align: center;
            justify-content: center;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.2s ease;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: none;
            text-align: left;
            gap: 20px;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(16, 185, 129, 0.04);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            transition: all 0.3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary-grad);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }
        /* CTA */
        .cta-section {
            padding: 80px 24px;
            background: var(--primary-grad);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            margin-bottom: 32px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary-dark);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 40px;
            border-radius: var(--radius-sm);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
            transition: all 0.25s ease;
        }
        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }
        /* 页脚 */
        .site-footer {
            background: #F0F3F1;
            border-top: 1px solid var(--border);
        }
        .footer-top {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 24px 40px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .logo-text {
            color: var(--text);
            font-size: 20px;
            margin-bottom: 12px;
        }
        .footer-brand .logo-text .grad {
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 14px;
            max-width: 260px;
            margin-top: 12px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.2s, padding-left 0.2s;
        }
        .footer-col a:hover {
            color: var(--primary-dark);
            padding-left: 4px;
        }
        .footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px 24px 30px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-weak);
            font-size: 13px;
        }
        /* 浮动CTA */
        .floating-cta {
            position: fixed;
            right: 32px;
            bottom: 32px;
            z-index: 900;
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--primary-grad);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: 999px;
            box-shadow: var(--shadow-cta);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all 0.4s ease;
            border: none;
        }
        .floating-cta.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .floating-cta:hover {
            transform: scale(1.04) translateY(-2px);
            color: #fff;
            box-shadow: 0 14px 36px rgba(16, 185, 129, 0.5);
        }
        .floating-cta i {
            font-size: 18px;
        }
        /* 表单弹层 */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 1200;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 24px;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            backdrop-filter: blur(3px);
        }
        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        .modal-box {
            background: #fff;
            border-radius: 20px;
            max-width: 480px;
            width: 100%;
            padding: 40px;
            box-shadow: 0 32px 64px rgba(0, 0, 0, 0.2);
            transform: translateY(30px);
            transition: transform 0.3s ease;
            position: relative;
        }
        .modal-overlay.active .modal-box {
            transform: translateY(0);
        }
        .modal-box h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .modal-box .modal-sub {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 24px;
        }
        .modal-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: all 0.2s;
        }
        .modal-close:hover {
            background: var(--primary);
            color: #fff;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 6px;
            font-weight: 500;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            height: 44px;
            border: 1.5px solid var(--border);
            border-radius: 10px;
            padding: 0 14px;
            font-size: 14px;
            transition: all 0.2s ease;
            background: #fafbfa;
        }
        .form-group textarea {
            height: 90px;
            padding: 12px 14px;
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
            background: #fff;
        }
        .form-submit {
            width: 100%;
            height: 48px;
            background: var(--primary-grad);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 10px;
            transition: all 0.25s ease;
            margin-top: 8px;
        }
        .form-submit:hover {
            box-shadow: var(--shadow-cta);
            transform: translateY(-2px);
        }
        .form-success {
            display: none;
            text-align: center;
            padding: 16px;
            background: rgba(16, 185, 129, 0.1);
            border-radius: 10px;
            color: var(--primary-dark);
            font-size: 14px;
            margin-top: 12px;
        }
        .form-success.show {
            display: block;
        }
        .form-error {
            display: none;
            color: #EF4444;
            font-size: 13px;
            margin-top: 4px;
        }
        .form-error.show {
            display: block;
        }
        .form-group.has-error input,
        .form-group.has-error textarea {
            border-color: #EF4444;
        }
        /* 响应式 */
        @media (max-width: 1199px) {
            .app-nav {
                width: 68px;
            }
            .nav-logo {
                padding: 20px 12px;
                justify-content: center;
            }
            .logo-text {
                display: none;
            }
            .nav-item {
                justify-content: center;
                padding: 14px 0;
                gap: 0;
            }
            .nav-item i {
                font-size: 18px;
            }
            .nav-item span {
                display: none;
            }
            .nav-footer {
                text-align: center;
                padding: 16px 8px;
                font-size: 10px;
            }
            .main-content {
                margin-left: 68px;
            }
        }
        @media (max-width: 991px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-right {
                max-width: 560px;
            }
            .features-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .features-left {
                position: static;
            }
            .timeline::before {
                left: 24px;
            }
            .timeline-item,
            .timeline-item:nth-child(odd),
            .timeline-item:nth-child(even) {
                left: 0;
                width: 100%;
                padding-left: 60px;
                padding-right: 0;
                text-align: left;
            }
            .timeline-item::before,
            .timeline-item:nth-child(odd)::before,
            .timeline-item:nth-child(even)::before {
                left: 16px;
                right: auto;
            }
            .timeline-item:nth-child(odd) .timeline-card h3 {
                justify-content: flex-start;
            }
            .plans-grid {
                grid-template-columns: 1fr;
                max-width: 440px;
            }
            .plan-card.recommended {
                height: auto;
                margin-top: 0;
                transform: none;
            }
            .plan-card.recommended:hover {
                transform: translateY(-4px);
            }
        }
        @media (max-width: 767px) {
            .app-nav {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .section {
                padding: var(--space-mobile) 20px;
            }
            .news-section {
                padding: var(--space-mobile) 20px;
            }
            .hero {
                padding: 48px 20px 56px;
            }
            .hero h1 {
                font-size: 30px;
                line-height: 1.3;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-ctas {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-ctas .btn-primary,
            .hero-ctas .btn-secondary {
                justify-content: center;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card-link {
                flex-direction: column;
            }
            .news-thumb {
                width: 100%;
                min-height: 180px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
                padding: 40px 20px 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding: 16px 20px 24px;
            }
            .floating-cta {
                right: 16px;
                bottom: 16px;
                padding: 0;
                width: 52px;
                height: 52px;
                border-radius: 50%;
                justify-content: center;
            }
            .floating-cta span {
                display: none;
            }
            .modal-box {
                padding: 32px 24px;
            }
            .evidence-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .faq-question {
                font-size: 14px;
                padding: 16px 18px;
            }
        }
        @media (max-width: 480px) {
            .footer-top {
                grid-template-columns: 1fr;
            }
            .footer-brand {
                grid-column: auto;
            }
            .hero-card {
                min-height: 300px;
            }
            .hero-badge {
                padding: 10px 14px;
            }
            .badge-number {
                font-size: 26px;
            }
            .plan-card {
                padding: 32px 24px;
            }
            .timeline-card {
                padding: 18px;
            }
        }

/* roulang page: category1 */
:root {
            --brand: #10B981;
            --brand-dark: #047A68;
            --brand-gradient: linear-gradient(135deg, #10B981, #047A68);
            --accent: #F5A623;
            --nav-bg: #0D1F19;
            --nav-highlight: #34D399;
            --bg: #F6F8F7;
            --card-bg: #FFFFFF;
            --border: #E4E9E7;
            --text-main: #12201C;
            --text-sub: #5B6E67;
            --text-weak: #94A3A0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --radius-pill: 999px;
            --shadow: 0 4px 14px rgba(13, 45, 33, 0.07);
            --shadow-hover: 0 12px 32px rgba(13, 45, 33, 0.12);
            --shadow-cta: 0 10px 24px rgba(16, 185, 129, 0.38);
            --space-section: 96px;
            --space-section-mobile: 56px;
            --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 15px;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }
        .main-content {
            min-height: 100vh;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--brand-gradient);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all .25s ease;
            box-shadow: 0 4px 16px rgba(16, 185, 129, 0.22);
            line-height: 1.4;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-cta);
            filter: brightness(1.05);
        }
        .btn:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.35);
            outline-offset: 2px;
        }
        .btn-outline {
            background: #fff;
            color: var(--brand-dark);
            border: 1.5px solid var(--brand-dark);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(16, 185, 129, 0.08);
            border-color: var(--brand);
            color: var(--brand-dark);
            box-shadow: 0 6px 18px rgba(16, 185, 129, 0.12);
        }
        .btn-light {
            background: #fff;
            color: var(--brand-dark);
            box-shadow: 0 4px 14px rgba(255, 255, 255, 0.2);
        }
        .btn-light:hover {
            background: #f0faf7;
            box-shadow: 0 8px 22px rgba(255, 255, 255, 0.25);
        }
        .badge {
            display: inline-block;
            background: rgba(16, 185, 129, 0.1);
            color: var(--brand-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.02em;
        }
        .badge-gold {
            background: rgba(245, 166, 35, 0.12);
            color: #B45309;
        }

        /* App Sidebar */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: var(--nav-bg);
            display: flex;
            flex-direction: column;
            z-index: 100;
            transition: transform 0.3s ease;
        }
        .sidebar-brand {
            padding: 36px 28px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--brand-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            margin-bottom: 12px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.01em;
        }
        .logo-text .grad {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .sidebar-nav {
            flex: 1;
            padding: 24px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-label {
            color: rgba(255, 255, 255, 0.45);
            font-size: 11px;
            letter-spacing: 0.16em;
            text-transform: uppercase;
            padding: 0 14px;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            transition: all 0.22s ease;
            position: relative;
            border-left: 3px solid transparent;
        }
        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s;
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .nav-item:hover i {
            color: var(--nav-highlight);
        }
        .nav-item.active {
            background: rgba(255, 255, 255, 0.08);
            border-left-color: var(--nav-highlight);
            color: #fff;
            font-weight: 600;
        }
        .nav-item.active i {
            color: var(--nav-highlight);
        }
        .sidebar-bottom {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.38);
            text-align: left;
            line-height: 1.7;
        }

        .sidebar-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 90;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--nav-bg);
            z-index: 95;
            padding: 0 18px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-logo {
            color: #fff;
            font-size: 17px;
            font-weight: 800;
        }
        .mobile-logo .grad {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hamburger {
            width: 42px;
            height: 42px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Main Layout */
        .main-wrapper {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Category Banner */
        .category-banner {
            position: relative;
            background: var(--nav-bg);
            background-image: linear-gradient(112deg, rgba(13, 31, 25, 0.95) 0%, rgba(13, 31, 25, 0.82) 55%, rgba(4, 122, 104, 0.42) 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            padding: 84px 0 72px;
            color: #fff;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .banner-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.14);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 20px;
            backdrop-filter: blur(6px);
        }
        .category-banner h1 {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .category-banner .banner-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.82);
            max-width: 600px;
            margin-bottom: 24px;
        }
        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }
        .banner-tags span {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.16);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.9);
        }
        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .banner-stat {
            display: flex;
            gap: 28px;
            margin-top: 38px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .banner-stat .stat-item {
            text-align: left;
        }
        .banner-stat .stat-num {
            font-size: 26px;
            font-weight: 800;
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .banner-stat .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 2px;
        }

        /* Featured Asymmetric Section */
        .featured-section {
            padding: var(--space-section) 0;
        }
        .featured-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: start;
        }
        .featured-left {}
        .featured-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .featured-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .featured-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }
        .featured-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .featured-cover .badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--brand-gradient);
            color: #fff;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }
        .featured-body {
            padding: 26px 28px;
        }
        .featured-body .featured-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 10px;
        }
        .featured-body h3 {
            font-size: 22px;
            line-height: 1.5;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .featured-body p {
            color: var(--text-sub);
            line-height: 1.75;
            margin-bottom: 18px;
            font-size: 14px;
        }
        .featured-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 16px;
            margin-bottom: 20px;
        }
        .featured-points li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-sub);
        }
        .featured-points li i {
            color: var(--brand);
            font-size: 12px;
        }
        .featured-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand-dark);
            font-weight: 600;
            font-size: 14px;
        }
        .featured-link:hover {
            gap: 10px;
        }
        .featured-link i {
            transition: transform 0.2s;
        }
        .featured-right {
            padding-top: 8px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 24px;
        }
        .section-title .grad {
            background: var(--brand-gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .guide-list {
            border-top: 1px solid var(--border);
        }
        .guide-list-item {
            padding: 18px 4px;
            border-bottom: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: background 0.2s ease, padding-left 0.2s ease;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }
        .guide-list-item:hover {
            background: rgba(16, 185, 129, 0.05);
            padding-left: 12px;
            padding-right: 12px;
        }
        .guide-list-top {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-weak);
        }
        .guide-list-top .badge {
            font-size: 11px;
            padding: 2px 10px;
        }
        .guide-list-item h4 {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
        }
        .guide-list-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-weak);
        }
        .guide-list-bottom a {
            color: var(--brand-dark);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Coverage Section */
        .coverage-section {
            background: #F0F4F2;
            padding: var(--space-section) 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .coverage-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 48px;
        }
        .coverage-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            max-width: 420px;
        }
        .coverage-head p {
            color: var(--text-sub);
            max-width: 360px;
            line-height: 1.7;
            font-size: 14px;
        }
        .coverage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .coverage-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 34px 30px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .coverage-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .coverage-num {
            font-size: 42px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1.5px rgba(16, 185, 129, 0.35);
            line-height: 1;
            margin-bottom: 16px;
            font-family: 'DIN', -apple-system, sans-serif;
        }
        .coverage-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--brand-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            margin-bottom: 18px;
            transition: transform 0.3s ease;
        }
        .coverage-card:hover .coverage-icon {
            transform: rotate(3deg);
        }
        .coverage-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .coverage-card p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
        }

        /* How To Use / Scenarios */
        .scenario-section {
            padding: var(--space-section) 0;
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 56px;
            align-items: center;
        }
        .scenario-left {}
        .scenario-left .section-title {
            margin-bottom: 14px;
        }
        .scenario-left p {
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 28px;
            font-size: 15px;
        }
        .scenario-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: relative;
        }
        .scenario-steps::before {
            content: '';
            position: absolute;
            left: 19px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--brand-gradient);
            opacity: 0.2;
        }
        .step-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            position: relative;
        }
        .step-dot {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-gradient);
            border: 2px solid var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            flex-shrink: 0;
            z-index: 1;
            box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
        }
        .step-content {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            flex: 1;
            box-shadow: var(--shadow);
            transition: transform 0.25s, box-shadow 0.25s;
        }
        .step-content:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .step-content h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .step-content p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .scenario-right {
            position: relative;
        }
        .scenario-card-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            border: 5px solid #fff;
        }
        .scenario-card-image img {
            width: 100%;
            height: auto;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .scenario-overlay-card {
            position: absolute;
            bottom: -26px;
            left: 24px;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 16px 20px;
            box-shadow: var(--shadow-hover);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .scenario-overlay-card .ov-icon {
            width: 42px;
            height: 42px;
            background: rgba(245, 166, 35, 0.12);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #B45309;
            font-size: 16px;
        }
        .scenario-overlay-card .ov-title {
            font-size: 14px;
            font-weight: 600;
        }
        .scenario-overlay-card .ov-sub {
            font-size: 12px;
            color: var(--text-sub);
        }

        /* FAQ */
        .faq-section {
            background: #F0F4F2;
            padding: var(--space-section) 0;
            border-top: 1px solid var(--border);
        }
        .faq-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .faq-header h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .faq-header p {
            color: var(--text-sub);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .faq-item.open {
            border-color: var(--brand);
            box-shadow: var(--shadow);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(16, 185, 129, 0.04);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-dark);
            font-size: 14px;
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-gradient);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.25s ease-out;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            border-top: 1px solid #f0f4f2;
            padding-top: 14px;
        }

        /* CTA */
        .cta-section {
            padding: var(--space-section) 0;
        }
        .cta-card {
            background: var(--nav-bg);
            background-image: linear-gradient(115deg, rgba(13, 31, 25, 0.97), rgba(16, 185, 129, 0.32)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
            padding: 64px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-card::after {
            content: '';
            position: absolute;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.08);
            top: -80px;
            right: -40px;
        }
        .cta-card h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            color: rgba(255, 255, 255, 0.75);
            max-width: 420px;
            margin: 0 auto 30px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
            font-size: 15px;
        }
        .cta-card .btn {
            position: relative;
            z-index: 1;
        }

        /* Site Footer */
        .site-footer {
            background: #F0F3F1;
            border-top: 1px solid var(--border);
            padding: 56px 0 0;
        }
        .footer-top {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 0.8fr;
            gap: 40px;
        }
        .footer-brand .logo-text {
            color: var(--text-main);
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-brand p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-sub);
            font-size: 14px;
            transition: color 0.2s, padding-left 0.2s;
        }
        .footer-col ul li a:hover {
            color: var(--brand-dark);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            margin-top: 40px;
            padding: 20px 28px;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-weak);
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 80;
            opacity: 0;
            pointer-events: none;
            transform: translateY(20px);
            transition: all 0.35s ease;
        }
        .floating-cta.visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }
        .floating-cta a {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--brand-gradient);
            color: #fff;
            padding: 15px 24px;
            border-radius: var(--radius-pill);
            box-shadow: var(--shadow-cta);
            font-size: 14px;
            font-weight: 600;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .floating-cta a:hover {
            transform: scale(1.04);
            box-shadow: 0 14px 32px rgba(16, 185, 129, 0.45);
        }
        .floating-cta i {
            font-size: 15px;
        }

        /* Scroll to top strip */
        .back-to-top {
            position: fixed;
            bottom: 96px;
            right: 40px;
            z-index: 75;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-dark);
            font-size: 15px;
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s ease;
            box-shadow: var(--shadow);
        }
        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
        }
        .back-to-top:hover {
            background: var(--brand-gradient);
            color: #fff;
        }

        /* Tablet */
        @media (max-width: 1199px) {
            .app-sidebar {
                width: 68px;
            }
            .sidebar-brand {
                padding: 24px 0;
                text-align: center;
            }
            .logo-icon {
                margin: 0 auto 8px;
            }
            .logo-text {
                font-size: 0;
            }
            .logo-text::first-letter {
                font-size: 20px;
            }
            .nav-item span {
                display: none;
            }
            .nav-item {
                justify-content: center;
                padding: 14px 0;
            }
            .nav-item i {
                font-size: 18px;
                width: auto;
            }
            .sidebar-nav .nav-label {
                text-align: center;
                padding: 0;
                font-size: 10px;
            }
            .sidebar-bottom {
                text-align: center;
                padding: 16px 6px;
                font-size: 10px;
            }
            .main-wrapper {
                margin-left: 68px;
            }
            .nav-item:hover span {
                display: block;
                position: fixed;
                left: 76px;
                background: var(--nav-bg);
                color: #fff;
                padding: 6px 14px;
                border-radius: 6px;
                font-size: 12px;
                white-space: nowrap;
                z-index: 120;
                box-shadow: var(--shadow-hover);
            }
            .coverage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 0.8fr 0.8fr;
            }
        }

        /* Mobile */
        @media (max-width: 767px) {
            .app-sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .app-sidebar.open {
                transform: translateX(0);
                box-shadow: 8px 0 30px rgba(0, 0, 0, 0.3);
            }
            .sidebar-overlay.open {
                opacity: 1;
                pointer-events: auto;
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: 60px;
            }
            .category-banner {
                padding: 60px 0 48px;
            }
            .category-banner h1 {
                font-size: 30px;
                line-height: 1.3;
            }
            .category-banner .banner-desc {
                font-size: 14px;
            }
            .banner-stat {
                gap: 20px;
                flex-wrap: wrap;
            }
            .featured-section {
                padding: var(--space-section-mobile) 0;
            }
            .featured-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .coverage-section {
                padding: var(--space-section-mobile) 0;
            }
            .coverage-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-bottom: 30px;
            }
            .coverage-head h2 {
                font-size: 24px;
            }
            .coverage-grid {
                grid-template-columns: 1fr;
            }
            .scenario-section {
                padding: var(--space-section-mobile) 0;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .scenario-overlay-card {
                position: static;
                margin-top: 16px;
            }
            .faq-section {
                padding: var(--space-section-mobile) 0;
            }
            .faq-header h2 {
                font-size: 24px;
            }
            .cta-section {
                padding: var(--space-section-mobile) 0;
            }
            .cta-card {
                padding: 40px 24px;
            }
            .cta-card h2 {
                font-size: 24px;
            }
            .site-footer {
                padding-top: 40px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 0 20px;
            }
            .footer-bottom {
                padding: 16px 20px;
                flex-direction: column;
                text-align: center;
            }
            .floating-cta {
                bottom: 20px;
                right: 20px;
            }
            .floating-cta a {
                padding: 12px 16px;
                font-size: 13px;
            }
            .back-to-top {
                bottom: 78px;
                right: 24px;
            }
            .featured-body {
                padding: 20px;
            }
            .featured-points {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 20px;
            }
        }

        @media (max-width: 520px) {
            .banner-actions {
                flex-direction: column;
                width: 100%;
            }
            .banner-actions .btn {
                width: 100%;
            }
            .guide-list-item h4 {
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
        }

/* roulang page: article */
:root {
  --primary: #10B981;
  --primary-dark: #047A68;
  --primary-light: #34D399;
  --accent: #F5A623;
  --nav-bg: #0D1F19;
  --bg: #F6F8F7;
  --card-bg: #FFFFFF;
  --border: #E4E9E7;
  --text-main: #12201C;
  --text-secondary: #5B6E67;
  --text-weak: #94A3A0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --icon-radius: 12px;
  --shadow-sm: 0 4px 14px rgba(13,45,33,0.07);
  --shadow-hover: 0 12px 32px rgba(13,45,33,0.12);
  --shadow-cta: 0 10px 24px rgba(16,185,129,0.38);
  --font-cn: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  --transition: 0.25s ease-out;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  font-size: 15px;
  line-height: 1.8;
  background: var(--bg);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
i { font-style: normal; }

/* ====== 左侧导航 ====== */
.app-sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 260px;
  background: var(--nav-bg);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 28px 0 20px;
  transition: width 0.3s ease;
}
.sidebar-inner { flex: 1; display: flex; flex-direction: column; padding: 0 16px; overflow-y: auto; }
.sidebar-logo { padding: 4px 12px 28px; }
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-text .grad {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-menu { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 14px;
  border-radius: 12px;
  color: #A9BDB5;
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease;
  border-left: 3px solid transparent;
}
.nav-item i { width: 20px; text-align: center; font-size: 16px; }
.nav-item:hover { background: rgba(255,255,255,0.06); color: #FFFFFF; }
.nav-item.active {
  background: rgba(255,255,255,0.08);
  color: var(--primary-light);
  border-left-color: var(--primary-light);
}
.sidebar-bottom { padding: 20px 12px 0; border-top: 1px solid rgba(255,255,255,0.08); margin-top: auto; }
.sidebar-bottom .copy { font-size: 12px; color: rgba(255,255,255,0.4); line-height: 1.6; }

/* ====== 主内容 ====== */
.main-wrapper { margin-left: 260px; min-height: 100vh; display: flex; flex-direction: column; transition: margin-left 0.3s ease; }
.page-container { flex: 1; width: 100%; max-width: 1160px; margin: 0 auto; padding: 40px 36px 60px; }

/* ====== 移动端头部 ====== */
.mobile-header {
  display: none;
  position: sticky; top: 0; z-index: 1002;
  background: var(--nav-bg);
  height: 60px;
  padding: 0 20px;
  align-items: center;
  justify-content: space-between;
}
.menu-toggle { color: #FFFFFF; font-size: 22px; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 8px; }
.menu-toggle:hover { background: rgba(255,255,255,0.08); }
.drawer-mask { display: none; }
.mobile-drawer { display: none; }

/* ====== 面包屑 ====== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--text-weak); }
.breadcrumb .current { color: var(--text-main); font-weight: 500; }
.breadcrumb i { font-size: 12px; margin-right: 4px; }

/* ====== 文章 Hero ====== */
.article-hero {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  background-image: url('/assets/images/backpic/back-2.png');
  padding: 52px 48px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-hover);
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(13,45,33,0.93), rgba(4,122,104,0.82));
  z-index: 1;
}
.article-hero-content { position: relative; z-index: 2; }
.article-hero .breadcrumb { margin-bottom: 20px; color: rgba(255,255,255,0.7); }
.article-hero .breadcrumb a { color: rgba(255,255,255,0.8); }
.article-hero .breadcrumb a:hover { color: var(--primary-light); }
.article-hero .breadcrumb .current { color: #FFFFFF; }
.article-hero h1 {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 16px;
  word-break: break-word;
}
.article-meta { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; margin-bottom: 16px; }
.article-metalist { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; }
.article-meta-item { display: inline-flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.85); font-size: 13px; }
.article-meta-item i { color: var(--primary-light); }
.article-cat {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,0.15);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: #FFFFFF;
  border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(4px);
}
.article-excerpt {
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  line-height: 1.7;
  max-width: 760px;
  border-left: 3px solid var(--primary-light);
  padding-left: 16px;
  margin-top: 6px;
}

/* ====== 正文 ====== */
.article-body {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 44px;
  word-wrap: break-word;
}
.article-body p { margin: 0 0 1.4em; font-size: 16px; line-height: 1.9; color: #1E2D28; }
.article-body h2 { font-size: 24px; font-weight: 700; margin: 1.8em 0 0.7em; color: var(--text-main); }
.article-body h3 { font-size: 20px; font-weight: 600; margin: 1.5em 0 0.5em; color: var(--text-main); }
.article-body h4 { font-size: 17px; font-weight: 600; margin: 1.4em 0 0.4em; color: var(--text-main); }
.article-body img { border-radius: var(--radius-md); margin: 1.2em 0; box-shadow: var(--shadow-sm); }
.article-body ul, .article-body ol { margin: 0 0 1.4em; padding-left: 1.6em; }
.article-body ul li { list-style: disc; margin-bottom: 0.4em; }
.article-body ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(16,185,129,0.06);
  padding: 14px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.4em 0;
  color: var(--text-secondary);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4em 0;
  font-size: 14px;
  background: #FFFFFF;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.article-body table th { background: var(--nav-bg); color: #FFFFFF; padding: 10px 14px; text-align: left; }
.article-body table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.article-body table tr:last-child td { border-bottom: none; }
.article-body code { background: #EDF2F0; padding: 2px 8px; border-radius: 6px; font-size: 14px; color: var(--primary-dark); }
.article-body a { color: var(--primary-dark); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--primary); }
.article-body hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }

/* 正文空态 */
.article-empty {
  background: var(--card-bg);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 80px 30px;
  text-align: center;
  margin-bottom: 44px;
}
.article-empty i { font-size: 48px; color: var(--text-weak); margin-bottom: 16px; }
.article-empty p { font-size: 18px; color: var(--text-main); margin-bottom: 20px; }
.article-empty .btn-primary { display: inline-flex; }

/* ====== 相关推荐 ====== */
.related-section { margin-bottom: 44px; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; }
.section-head h2 { font-size: 26px; font-weight: 700; color: var(--text-main); position: relative; }
.section-head h2::after { content: ''; display: block; width: 36px; height: 4px; border-radius: 4px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); margin-top: 8px; }
.more-link { font-size: 14px; color: var(--primary-dark); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.more-link:hover { color: var(--primary); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--primary); }
.related-card-cover { position: relative; aspect-ratio: 16/10; overflow: hidden; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.related-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .related-card-cover img { transform: scale(1.05); }
.related-card-body { padding: 22px 22px 24px; }
.badge {
  display: inline-block;
  background: rgba(16,185,129,0.1);
  color: var(--primary-dark);
  border: 1px solid rgba(16,185,129,0.25);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.related-card-body h3 { font-size: 18px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; line-height: 1.4; }
.related-card-body p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.read-more { font-size: 13px; font-weight: 600; color: var(--primary-dark); display: inline-flex; align-items: center; gap: 6px; transition: gap 0.2s ease; }
.read-more:hover { gap: 10px; color: var(--primary); }

/* ====== 返回分类 CTA ====== */
.back-category { margin-bottom: 44px; }
.back-category-inner {
  background: linear-gradient(135deg, var(--nav-bg), #063A2E);
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.back-category-inner::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245,166,35,0.25), transparent 70%);
}
.back-category-inner::after {
  content: '';
  position: absolute;
  bottom: -60px; left: -40px;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(16,185,129,0.25), transparent 70%);
}
.back-category-inner h3 { font-size: 24px; font-weight: 700; color: #FFFFFF; margin-bottom: 10px; }
.back-category-inner p { font-size: 14px; color: rgba(255,255,255,0.75); margin-bottom: 28px; }
.back-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; position: relative; z-index: 1; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #FFFFFF;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow-cta);
  transition: transform 0.3s ease, box-shadow 0.3s ease, filter 0.2s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(16,185,129,0.42); filter: brightness(1.05); }
.btn-primary:focus-visible { outline: 3px solid rgba(16,185,129,0.35); outline-offset: 2px; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  color: #FFFFFF;
  border: 1.5px solid rgba(255,255,255,0.45);
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}
.btn-outline:hover { background: rgba(255,255,255,0.14); border-color: var(--primary-light); transform: translateY(-2px); }

/* ====== 页脚 ====== */
.site-footer { background: #F0F3F1; border-top: 1px solid var(--border); padding: 48px 36px 24px; }
.footer-top { max-width: 1160px; margin: 0 auto; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 32px; }
.footer-brand .logo-text { font-size: 22px; color: var(--text-main); }
.footer-brand p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-top: 14px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text-main); margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 13px; color: var(--text-secondary); transition: color 0.2s ease; }
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom { max-width: 1160px; margin: 0 auto; border-top: 1px solid var(--border); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--text-weak); }

/* ====== 响应式 ====== */
@media (max-width: 1199px) {
  .app-sidebar { width: 68px; }
  .sidebar-inner { padding: 0 10px; }
  .sidebar-logo { padding: 4px 6px 24px; text-align: center; }
  .logo-text { font-size: 0; }
  .logo-text .grad { font-size: 18px; }
  .nav-item { justify-content: center; padding: 14px 0; gap: 0; }
  .nav-item span { display: none; }
  .sidebar-bottom { text-align: center; padding: 16px 6px 0; }
  .sidebar-bottom .copy { font-size: 10px; }
  .main-wrapper { margin-left: 68px; }
}
@media (max-width: 991px) {
  .related-grid { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .app-sidebar { display: none; }
  .main-wrapper { margin-left: 0; }
  .mobile-header { display: flex; }
  .page-container { padding: 24px 20px 48px; }
  .drawer-mask {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(8,20,16,0.55);
    z-index: 1100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }
  .drawer-mask.active { opacity: 1; visibility: visible; }
  .mobile-drawer {
    display: flex;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 280px;
    background: var(--nav-bg);
    z-index: 1101;
    flex-direction: column;
    padding: 24px 20px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }
  .mobile-drawer.open { transform: translateX(0); }
  .mobile-drawer .logo-text { font-size: 20px; margin-bottom: 32px; display: block; }
  .mobile-drawer .nav-menu { gap: 6px; }
  .mobile-drawer .nav-item { justify-content: flex-start; padding: 14px 16px; gap: 14px; }
  .mobile-drawer .nav-item span { display: inline; }
  .mobile-drawer .sidebar-bottom { border-top: 1px solid rgba(255,255,255,0.08); margin-top: auto; padding-top: 20px; }
  .article-hero { padding: 36px 24px; }
  .article-hero h1 { font-size: 28px; }
  .article-body { padding: 28px 22px; }
  .related-grid { grid-template-columns: 1fr; }
  .back-category-inner { padding: 36px 24px; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; }
}
@media (max-width: 520px) {
  .article-meta { gap: 12px; }
  .article-body p { font-size: 15px; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; padding: 14px 16px; }
  .back-actions { flex-direction: column; }
}

/* roulang page: category2 */
:root {
    --primary: #10B981;
    --primary-dark: #047A68;
    --accent: #F5A623;
    --nav-bg: #0D1F19;
    --nav-accent: #34D399;
    --bg: #F6F8F7;
    --card-bg: #FFFFFF;
    --border: #E4E9E7;
    --text-main: #12201C;
    --text-sub: #5B6E67;
    --text-weak: #94A3A0;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow: 0 4px 14px rgba(13,45,33,0.07);
    --shadow-hover: 0 12px 32px rgba(13,45,33,0.12);
    --grad-brand: linear-gradient(135deg, #10B981, #047A68);
    --sidebar-w: 260px;
    --sidebar-mini: 68px;
    --section-gap: 96px;
    --transition: 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
    background: var(--bg);
    color: var(--text-main);
    font-size: 15px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
img { max-width: 100%; display: block; object-fit: cover; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ========== 左侧导航 ========== */
.sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--sidebar-w);
    background: var(--nav-bg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 28px 0 22px;
    z-index: 999;
    transition: transform var(--transition), width var(--transition);
}
.sidebar-top { padding: 0 24px 26px; border-bottom: 1px solid rgba(255,255,255,0.07); }
.sidebar-logo { display: flex; align-items: center; gap: 12px; }
.logo-icon {
    width: 40px; height: 40px;
    background: var(--grad-brand);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 19px;
    box-shadow: 0 4px 12px rgba(16,185,129,0.3);
}
.logo-text { font-size: 20px; font-weight: 800; color: #fff; letter-spacing: 0.5px; }
.logo-text .grad { background: linear-gradient(135deg, var(--primary), var(--nav-accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: var(--primary); }
.nav-menu { padding: 22px 14px 0; display: flex; flex-direction: column; gap: 4px; }
.nav-item {
    display: flex; align-items: center; gap: 13px;
    padding: 13px 16px;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.74);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: background 0.22s ease, color 0.22s ease;
}
.nav-item i { width: 20px; text-align: center; font-size: 16px; }
.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active {
    background: rgba(255,255,255,0.08);
    color: var(--nav-accent);
    font-weight: 600;
}
.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0; top: 50%; transform: translateY(-50%);
    width: 3px; height: 24px;
    border-radius: 3px;
    background: var(--nav-accent);
}
.sidebar-bottom { padding: 20px 24px 0; border-top: 1px solid rgba(255,255,255,0.07); }
.sidebar-bottom p { color: rgba(255,255,255,0.35); font-size: 12px; line-height: 1.7; }
.sidebar-bottom span { display: block; color: rgba(255,255,255,0.25); font-size: 11px; }

/* ========== 移动端顶部栏 ========== */
.mobile-header {
    display: none;
    position: fixed; top: 0; left: 0; right: 0;
    height: 60px;
    background: var(--nav-bg);
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 998;
    box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.mobile-logo { font-size: 18px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 8px; }
.mobile-logo i { color: var(--primary); font-size: 20px; }
.menu-toggle {
    width: 42px; height: 42px;
    background: rgba(255,255,255,0.07);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 19px;
    transition: background 0.2s ease;
}
.menu-toggle:hover { background: rgba(255,255,255,0.13); }
.nav-mask {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 997;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease;
}
.nav-mask.show { opacity: 1; pointer-events: auto; }

/* ========== 主内容区 ========== */
.main-content { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }

/* ========== 页面横幅 ========== */
.page-banner {
    position: relative;
    padding: 84px 0 72px;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    overflow: hidden;
}
.page-banner::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(120deg, rgba(13,31,25,0.94) 30%, rgba(13,31,25,0.72) 65%, rgba(13,31,25,0.5) 100%);
}
.page-banner .container { position: relative; z-index: 1; }
.breadcrumb { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.6); font-size: 13px; margin-bottom: 16px; }
.breadcrumb a { color: var(--nav-accent); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: rgba(255,255,255,0.45); }
.page-banner h1 {
    font-size: 44px; line-height: 56px; font-weight: 800;
    color: #fff; margin: 0 0 16px;
}
.page-banner .banner-lead {
    max-width: 640px;
    font-size: 17px; line-height: 1.7;
    color: rgba(255,255,255,0.82);
    margin-bottom: 26px;
}
.banner-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.banner-tags span {
    background: rgba(255,255,255,0.11);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 999px;
    padding: 6px 16px;
    font-size: 13px;
    color: rgba(255,255,255,0.85);
}

/* ========== 全宽介绍卡 ========== */
.intro-cards { padding: var(--section-gap) 0 30px; }
.full-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    overflow: hidden;
    margin-bottom: 40px;
    transition: box-shadow var(--transition), transform var(--transition);
}
.full-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.full-card-img { width: 48%; min-height: 300px; }
.full-card-img img { width: 100%; height: 100%; object-fit: cover; }
.full-card-body { flex: 1; padding: 42px 44px; display: flex; flex-direction: column; justify-content: center; }
.badge {
    display: inline-flex; align-items: center;
    background: rgba(16,185,129,0.1);
    color: var(--primary-dark);
    font-size: 13px; font-weight: 600;
    border-radius: 999px;
    padding: 5px 14px;
    width: fit-content;
    margin-bottom: 14px;
}
.full-card-body h2 { font-size: 26px; line-height: 34px; font-weight: 700; margin-bottom: 12px; color: var(--text-main); }
.full-card-body p { color: var(--text-sub); font-size: 15px; line-height: 1.8; margin-bottom: 20px; }
.feature-list { display: flex; flex-direction: column; gap: 10px; }
.feature-list li { display: flex; align-items: center; gap: 10px; color: var(--text-sub); font-size: 14px; }
.feature-list li i { color: var(--primary); font-size: 14px; }
.full-card.reverse .full-card-img { order: 2; }
.full-card.reverse .full-card-body { order: 1; }

/* ========== 内容分区标题 ========== */
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 { font-size: 32px; line-height: 40px; font-weight: 700; color: var(--text-main); margin-bottom: 10px; }
.section-head p { max-width: 640px; margin: 0 auto; color: var(--text-sub); font-size: 15px; }

/* ========== Z字型内容流 ========== */
.z-flow { padding: 30px 0 var(--section-gap); }
.z-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 72px;
}
.z-row:last-child { margin-bottom: 0; }
.z-img {
    width: 46%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    position: relative;
}
.z-img::after {
    content: '';
    position: absolute; inset: 0;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-lg);
    pointer-events: none;
}
.z-img img { width: 100%; height: 320px; object-fit: cover; transition: transform 0.45s ease; }
.z-img:hover img { transform: scale(1.04); }
.z-text { flex: 1; }
.z-text .z-index {
    font-family: "DIN", "Barlow", Arial, sans-serif;
    font-size: 46px; font-weight: 800;
    color: transparent;
    background: linear-gradient(135deg, rgba(16,185,129,0.35), rgba(16,185,129,0.08));
    -webkit-background-clip: text;
    background-clip: text;
    line-height: 1;
    display: block;
    margin-bottom: 8px;
}
.z-text h3 { font-size: 22px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.z-text p { color: var(--text-sub); font-size: 15px; line-height: 1.8; margin-bottom: 16px; }
.z-link { display: inline-flex; align-items: center; gap: 6px; color: var(--primary-dark); font-size: 14px; font-weight: 600; }
.z-link:hover { color: var(--primary); gap: 10px; }
.z-link .fa-arrow-right { font-size: 13px; }
.z-row.reverse .z-img { order: 2; }
.z-row.reverse .z-text { order: 1; }

/* ========== 数据亮点 ========== */
.stats-band {
    background: var(--nav-bg);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.stats-band::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at 20% 30%, rgba(16,185,129,0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(16,185,129,0.1) 0%, transparent 40%);
}
.stats-band .container { position: relative; z-index: 1; }
.stats-band h2 { color: #fff; font-size: 32px; font-weight: 700; text-align: center; margin-bottom: 52px; }
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.stat-item {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    text-align: center;
    transition: background 0.25s ease, border-color 0.25s ease;
}
.stat-item:hover { background: rgba(255,255,255,0.08); border-color: rgba(16,185,129,0.3); }
.stat-item .stat-num {
    font-size: 46px; font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 6px;
    font-family: "DIN", "Barlow", Arial, sans-serif;
}
.stat-item .stat-num em { font-style: normal; color: var(--accent); }
.stat-item .stat-label { color: rgba(255,255,255,0.6); font-size: 14px; }
.stat-item .stat-icon { color: var(--accent); font-size: 22px; margin-bottom: 10px; display: block; }

/* ========== FAQ ========== */
.faq-section { padding: var(--section-gap) 0 60px; }
.faq-section .section-head h2 { margin-bottom: 4px; }
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.faq-item.active { border-color: var(--primary); box-shadow: var(--shadow); }
.faq-q {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px; font-weight: 600;
    color: var(--text-main);
    transition: background 0.2s ease;
}
.faq-q:hover { background: rgba(16,185,129,0.03); }
.faq-q .faq-icon {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: rgba(16,185,129,0.1);
    display: flex; align-items: center; justify-content: center;
    color: var(--primary-dark);
    font-size: 14px;
    flex-shrink: 0;
    transition: transform 0.25s ease, background 0.25s ease;
}
.faq-item.active .faq-icon { background: var(--grad-brand); color: #fff; transform: rotate(45deg); }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease;
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.7;
}
.faq-item.active .faq-a { max-height: 300px; padding: 0 24px 22px; }

/* ========== CTA ========== */
.cta-section { padding: 20px 0 var(--section-gap); }
.cta-card {
    background: var(--grad-brand);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-card::before {
    content: '';
    position: absolute;
    width: 260px; height: 260px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    top: -80px; right: -60px;
}
.cta-card::after {
    content: '';
    position: absolute;
    width: 160px; height: 160px;
    border-radius: 50%;
    background: rgba(255,255,255,0.04);
    bottom: -50px; left: -30px;
}
.cta-card h2 { font-size: 30px; font-weight: 800; color: #fff; margin-bottom: 12px; position: relative; z-index: 1; }
.cta-card p { color: rgba(255,255,255,0.88); font-size: 16px; margin-bottom: 30px; position: relative; z-index: 1; }
.cta-btns { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; position: relative; z-index: 1; }
.btn-primary {
    background: #fff;
    color: var(--primary-dark);
    border-radius: 10px;
    padding: 12px 28px;
    font-size: 15px; font-weight: 600;
    display: inline-flex; align-items: center; gap: 8px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0,0,0,0.15); color: var(--primary-dark); }
.btn-ghost {
    background: transparent;
    border: 1.5px solid rgba(255,255,255,0.6);
    color: #fff;
    border-radius: 10px;
    padding: 11px 28px;
    font-size: 15px; font-weight: 600;
    display: inline-flex; align-items: center; gap: 8px;
    transition: background 0.2s ease, border-color 0.2s ease;
}
.btn-ghost:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; }

/* ========== 页脚 ========== */
.site-footer {
    background: #F0F3F1;
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}
.footer-top { max-width: 1200px; margin: 0 auto; padding: 0 32px; display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.footer-brand { max-width: 340px; }
.footer-brand .logo-text { color: var(--text-main); font-size: 22px; }
.footer-brand p { color: var(--text-sub); font-size: 13px; line-height: 1.7; margin-top: 10px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text-main); margin-bottom: 14px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul a { color: var(--text-sub); font-size: 13px; transition: color 0.2s ease; }
.footer-col ul a:hover { color: var(--primary-dark); }
.footer-bottom { max-width: 1200px; margin: 44px auto 0; padding: 20px 32px 0; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-bottom span { color: var(--text-weak); font-size: 13px; }

/* ========== 浮动 CTA ========== */
.float-cta {
    position: fixed;
    right: 32px; bottom: 32px;
    z-index: 996;
    padding: 14px 24px;
    background: var(--grad-brand);
    border-radius: 999px;
    color: #fff;
    font-size: 15px; font-weight: 600;
    display: flex; align-items: center; gap: 9px;
    box-shadow: 0 10px 24px rgba(16,185,129,0.38);
    opacity: 0; visibility: hidden;
    transform: translateY(14px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}
.float-cta:hover { transform: translateY(-2px) scale(1.04); color: #fff; box-shadow: 0 14px 32px rgba(16,185,129,0.45); }
.float-cta.visible { opacity: 1; visibility: visible; transform: translateY(0); }

/* ========== 响应式 ========== */
@media (max-width: 1199px) {
    .sidebar { width: var(--sidebar-mini); }
    .main-content { margin-left: var(--sidebar-mini); }
    .sidebar-top { padding: 0 14px 22px; }
    .sidebar-logo { justify-content: center; }
    .logo-text { display: none; }
    .nav-menu { padding: 18px 10px 0; }
    .nav-item { justify-content: center; padding: 14px; }
    .nav-item span { display: none; }
    .nav-item i { font-size: 18px; }
    .sidebar-bottom { padding: 16px 10px 0; text-align: center; }
    .sidebar-bottom p, .sidebar-bottom span { display: none; }
    .full-card-body { padding: 28px 30px; }
    .z-row { gap: 36px; }
    .z-img { width: 48%; }
    .z-img img { height: 280px; }
}
@media (max-width: 767px) {
    .sidebar {
        width: 260px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 4px 0 24px rgba(0,0,0,0.2);
    }
    .sidebar.mobile-open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .mobile-header { display: flex; }
    .nav-mask { display: block; }
    .sidebar-top { padding: 0 20px 22px; }
    .sidebar-logo { justify-content: flex-start; }
    .logo-text { display: flex; }
    .nav-menu { padding: 18px 14px 0; }
    .nav-item { justify-content: flex-start; padding: 13px 16px; }
    .nav-item span { display: inline; }
    .nav-item i { font-size: 16px; }
    .sidebar-bottom { padding: 16px 20px 0; text-align: left; }
    .sidebar-bottom p, .sidebar-bottom span { display: block; }
    body.menu-open { overflow: hidden; }
    .container { padding: 0 20px; }
    .page-banner { padding: 110px 0 52px; }
    .page-banner h1 { font-size: 30px; line-height: 38px; }
    .page-banner .banner-lead { font-size: 15px; }
    .intro-cards { padding: 56px 0 20px; }
    .full-card { flex-direction: column; }
    .full-card-img { width: 100%; min-height: 200px; }
    .full-card-img img { height: 220px; }
    .full-card-body { padding: 24px; }
    .full-card.reverse .full-card-img { order: 1; }
    .full-card.reverse .full-card-body { order: 2; }
    .section-head { margin-bottom: 36px; }
    .section-head h2 { font-size: 24px; line-height: 32px; }
    .z-flow { padding: 30px 0 56px; }
    .z-row { flex-direction: column; gap: 20px; margin-bottom: 48px; }
    .z-img { width: 100%; }
    .z-img img { height: 220px; }
    .z-row.reverse .z-img { order: 1; }
    .z-row.reverse .z-text { order: 2; }
    .stats-band { padding: 56px 0; }
    .stats-grid { grid-template-columns: 1fr; gap: 16px; }
    .stats-band h2 { font-size: 26px; margin-bottom: 36px; }
    .stat-item { padding: 26px 20px; }
    .stat-item .stat-num { font-size: 36px; }
    .faq-section { padding: 56px 0 40px; }
    .faq-q { padding: 18px 18px; font-size: 15px; }
    .faq-item.active .faq-a { padding: 0 18px 18px; }
    .cta-section { padding: 10px 0 56px; }
    .cta-card { padding: 40px 22px; }
    .cta-card h2 { font-size: 24px; line-height: 32px; }
    .cta-btns { flex-direction: column; align-items: center; }
    .btn-primary, .btn-ghost { width: 100%; justify-content: center; }
    .footer-top { gap: 28px; padding: 0 20px; }
    .footer-bottom { padding: 20px 20px 0; flex-direction: column; text-align: center; }
    .float-cta { right: 20px; bottom: 20px; padding: 14px 20px; font-size: 14px; }
}
@media (max-width: 520px) {
    .page-banner h1 { font-size: 26px; line-height: 34px; }
    .full-card-body h2 { font-size: 22px; line-height: 30px; }
    .z-text h3 { font-size: 20px; }
    .cta-card h2 { font-size: 22px; }
}

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #10B981;
            --primary-dark: #047A68;
            --accent: #F5A623;
            --nav-bg: #0D1F19;
            --nav-accent: #34D399;
            --bg: #F6F8F7;
            --card: #FFFFFF;
            --border: #E4E9E7;
            --text: #12201C;
            --text-secondary: #5B6E67;
            --text-weak: #94A3A0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --radius-pill: 999px;
            --shadow: 0 4px 14px rgba(13, 45, 33, 0.07);
            --shadow-hover: 0 12px 32px rgba(13, 45, 33, 0.12);
            --shadow-cta: 0 10px 24px rgba(16, 185, 129, 0.38);
            --grad: linear-gradient(135deg, #10B981, #047A68);
            --section-space: 96px;
            --container-max: 1200px;
            --nav-width: 260px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
            font-size: 14px;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            font-weight: 700;
        }
        ul {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== Left App Shell Nav ===== */
        .app-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--nav-bg);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            z-index: 100;
            padding: 28px 20px 20px;
            transition: transform 0.3s ease;
        }
        .nav-brand {
            padding: 0 8px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .brand-link {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: var(--grad);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .brand-text .grad {
            background: var(--grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-menu {
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-top: 24px;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.22s ease;
            position: relative;
        }
        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 15px;
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.9);
        }
        .nav-item.active {
            background: rgba(255, 255, 255, 0.08);
            color: var(--nav-accent);
            font-weight: 600;
        }
        .nav-item.active::before {
            content: "";
            position: absolute;
            left: -20px;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 22px;
            background: var(--nav-accent);
            border-radius: 0 3px 3px 0;
        }
        .nav-bottom {
            padding: 16px 8px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
            line-height: 1.6;
        }

        /* ===== Mobile Header & Drawer ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 60px;
            background: var(--nav-bg);
            z-index: 120;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }
        .mobile-header .logo-text {
            color: #fff;
            font-size: 17px;
            font-weight: 800;
        }
        .mobile-header .logo-text .grad {
            background: var(--grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .menu-toggle {
            color: #fff;
            font-size: 22px;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background 0.2s;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .drawer-mask {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 130;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .drawer-mask.show {
            opacity: 1;
        }
        .drawer-nav {
            display: none;
            position: fixed;
            top: 0;
            left: -300px;
            width: 280px;
            height: 100vh;
            background: var(--nav-bg);
            z-index: 140;
            flex-direction: column;
            padding: 24px 20px;
            transition: left 0.3s ease;
        }
        .drawer-nav.open {
            left: 0;
        }
        .drawer-brand {
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            padding: 8px 8px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .drawer-brand .brand-icon {
            font-size: 15px;
        }
        .drawer-brand .grad {
            background: var(--grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .drawer-nav .nav-menu {
            margin-top: 16px;
        }
        .drawer-bottom {
            margin-top: auto;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.35);
            font-size: 12px;
        }

        /* ===== Main Wrapper ===== */
        .main-wrapper {
            margin-left: var(--nav-width);
            min-height: 100vh;
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--nav-bg);
        }
        .cat-hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.5;
        }
        .cat-hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(115deg, rgba(13, 31, 25, 0.95) 30%, rgba(13, 31, 25, 0.55) 100%);
        }
        .cat-hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 80px 0;
            margin-left: 64px;
        }
        .hero-kicker {
            display: inline-block;
            background: rgba(16, 185, 129, 0.18);
            color: var(--nav-accent);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: var(--radius-pill);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 18px;
            border: 1px solid rgba(16, 185, 129, 0.25);
        }
        .cat-hero-content h1 {
            color: #fff;
            font-size: 44px;
            line-height: 56px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cat-hero-content p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 16px;
            line-height: 1.8;
            max-width: 580px;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.25s ease;
            border: 1.5px solid transparent;
        }
        .btn-primary {
            background: var(--grad);
            color: #fff;
            box-shadow: var(--shadow-cta);
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(16, 185, 129, 0.45);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.35);
            outline-offset: 2px;
        }
        .btn-light {
            background: #fff;
            color: var(--text);
        }
        .btn-light:hover {
            background: #f0f3f1;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(0, 0, 0, 0.1);
        }
        .btn-ghost-white {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-ghost-white:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
        }
        .btn-outline {
            background: #fff;
            color: var(--primary-dark);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(16, 185, 129, 0.08);
            transform: translateY(-2px);
        }

        /* ===== Section Head ===== */
        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--primary-dark);
            background: rgba(16, 185, 129, 0.08);
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
        }
        .section-head {
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: 32px;
            line-height: 40px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .section-head p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 560px;
        }

        /* ===== Index List Section ===== */
        .index-section {
            padding: var(--section-space) 0;
        }
        .index-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .index-item {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 24px 32px;
            border-bottom: 1px solid var(--border);
            transition: all 0.25s ease;
            position: relative;
        }
        .index-item:last-child {
            border-bottom: none;
        }
        .index-item:hover {
            background: rgba(16, 185, 129, 0.04);
            padding-left: 40px;
        }
        .index-item:hover .index-arrow {
            transform: translateX(4px);
            color: var(--primary);
        }
        .index-num {
            font-family: "DIN", "Barlow", -apple-system, sans-serif;
            font-size: 28px;
            font-weight: 800;
            color: transparent;
            -webkit-background-clip: text;
            background-clip: text;
            background-image: var(--grad);
            min-width: 60px;
            line-height: 1;
        }
        .index-body {
            flex: 1;
        }
        .index-title {
            display: block;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }
        .index-desc {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .index-arrow {
            color: var(--text-weak);
            font-size: 16px;
            transition: all 0.25s ease;
        }

        /* ===== Knowledge Cards ===== */
        .knowledge-section {
            padding: var(--section-space) 0;
            background: #fff;
        }
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .knowledge-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .knowledge-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .knowledge-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }
        .knowledge-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .knowledge-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            z-index: 2;
        }
        .knowledge-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .knowledge-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .knowledge-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }
        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease;
        }
        .card-link:hover {
            gap: 10px;
            color: var(--primary);
        }

        /* ===== Method Section ===== */
        .method-section {
            padding: var(--section-space) 0;
        }
        .method-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .method-intro h2 {
            font-size: 32px;
            margin-bottom: 14px;
        }
        .method-intro p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 24px;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline::before {
            content: "";
            position: absolute;
            left: 9px;
            top: 8px;
            bottom: 8px;
            width: 3px;
            background: var(--grad);
            border-radius: 3px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 28px 0;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: -30px;
            top: 6px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--grad);
            border: 3px solid var(--accent);
            box-shadow: 0 0 0 4px rgba(245, 166, 35, 0.2);
        }
        .timeline-item h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .timeline-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Evidence Section ===== */
        .evidence-section {
            padding: var(--section-space) 0;
            background: var(--nav-bg);
            position: relative;
            overflow: hidden;
        }
        .evidence-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(rgba(16, 185, 129, 0.12) 1px, transparent 1px);
            background-size: 28px 28px;
            opacity: 0.4;
        }
        .evidence-container {
            position: relative;
            z-index: 2;
        }
        .evidence-container .section-head h2 {
            color: #fff;
        }
        .evidence-container .section-head p {
            color: rgba(255, 255, 255, 0.6);
        }
        .evidence-container .section-tag {
            color: var(--nav-accent);
            background: rgba(16, 185, 129, 0.15);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: all 0.3s ease;
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .stat-icon {
            color: var(--accent);
            font-size: 22px;
            margin-bottom: 12px;
        }
        .stat-num {
            font-family: "DIN", "Barlow", -apple-system, sans-serif;
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-num span {
            font-size: 18px;
            color: var(--nav-accent);
        }
        .stat-label {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
            margin-top: 6px;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: var(--section-space) 0;
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(16, 185, 129, 0.03);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            transition: all 0.3s ease;
        }
        .faq-item.active .faq-icon {
            background: var(--grad);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.25s ease-out;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer p {
            padding: 0 24px 24px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: var(--section-space) 0;
            background: var(--grad);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -10%;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }
        .cta-container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .cta-copy h2 {
            color: #fff;
            font-size: 32px;
            line-height: 42px;
            margin-bottom: 14px;
        }
        .cta-copy p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .cta-points {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .cta-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.9);
            font-size: 14px;
        }
        .cta-points li i {
            color: var(--accent);
        }
        .cta-form-wrap {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: 0 20px 44px rgba(0, 0, 0, 0.18);
        }
        .cta-form-wrap h3 {
            font-size: 20px;
            margin-bottom: 6px;
        }
        .cta-form-wrap>p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            height: 44px;
            border: 1.5px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 0 14px;
            font-size: 14px;
            color: var(--text);
            background: #fafcfb;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .form-group textarea {
            height: 80px;
            padding: 12px 14px;
            resize: none;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
        }
        .form-group input.error,
        .form-group textarea.error {
            border-color: #EF4444;
        }
        .form-error {
            font-size: 12px;
            color: #EF4444;
            margin-top: 4px;
            display: none;
        }
        .form-error.show {
            display: block;
        }
        .form-group input[type="submit"] {
            background: var(--grad);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            height: 48px;
            border-radius: var(--radius-sm);
            margin-top: 8px;
            transition: filter 0.2s ease, transform 0.2s ease;
        }
        .form-group input[type="submit"]:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
        }
        .form-success {
            display: none;
            text-align: center;
            padding: 24px 0;
        }
        .form-success i {
            font-size: 42px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .form-success p {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #F0F3F1;
            padding: 56px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 32px 40px;
        }
        .footer-brand .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
        }
        .footer-brand .logo-text .grad {
            background: var(--grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 12px;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .footer-col ul li a:hover {
            color: var(--primary-dark);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 20px 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--text-weak);
        }

        /* ===== Float CTA ===== */
        .float-cta {
            position: fixed;
            right: 32px;
            bottom: 32px;
            z-index: 110;
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--grad);
            color: #fff;
            padding: 14px 24px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            box-shadow: var(--shadow-cta);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all 0.3s ease;
        }
        .float-cta.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .float-cta:hover {
            transform: scale(1.04) translateY(-2px);
        }

        /* ===== Modal ===== */
        .modal-mask {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.55);
            z-index: 200;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.25s ease;
        }
        .modal-mask.show {
            display: flex;
            opacity: 1;
        }
        .modal-box {
            background: #fff;
            border-radius: var(--radius-lg);
            width: 420px;
            max-width: 92%;
            padding: 36px;
            position: relative;
            transform: translateY(30px);
            transition: transform 0.3s ease;
        }
        .modal-mask.show .modal-box {
            transform: translateY(0);
        }
        .modal-close {
            position: absolute;
            top: 14px;
            right: 14px;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.05);
            color: var(--text-secondary);
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }
        .modal-close:hover {
            background: rgba(0, 0, 0, 0.1);
        }
        .modal-box h3 {
            font-size: 20px;
            margin-bottom: 6px;
        }
        .modal-box>p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199px) {
            .app-nav {
                width: 68px;
                padding: 24px 10px 16px;
            }
            .brand-text,
            .nav-item span,
            .nav-bottom {
                display: none;
            }
            .nav-brand {
                padding: 0 0 20px;
                display: flex;
                justify-content: center;
            }
            .brand-icon {
                width: 40px;
                height: 40px;
            }
            .nav-item {
                justify-content: center;
                padding: 14px 0;
            }
            .nav-item i {
                font-size: 17px;
            }
            .nav-item.active::before {
                left: -10px;
            }
            .main-wrapper {
                margin-left: 68px;
            }
            .cat-hero-content {
                margin-left: 36px;
            }
            .knowledge-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767px) {
            .app-nav {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .drawer-mask {
                display: block;
            }
            .drawer-nav {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: 60px;
            }
            .container {
                padding: 0 20px;
            }
            :root {
                --section-space: 56px;
            }
            .cat-hero {
                min-height: 360px;
            }
            .cat-hero-content {
                margin-left: 20px;
                padding: 60px 0;
            }
            .cat-hero-content h1 {
                font-size: 30px;
                line-height: 38px;
            }
            .cat-hero-content p {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .section-head h2 {
                font-size: 24px;
                line-height: 32px;
            }
            .index-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 20px;
            }
            .index-item:hover {
                padding-left: 20px;
            }
            .index-num {
                font-size: 22px;
            }
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
            .method-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card {
                padding: 20px 14px;
            }
            .stat-num {
                font-size: 28px;
            }
            .cta-container {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .cta-form-wrap {
                padding: 24px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
                padding: 0 20px 32px;
            }
            .footer-bottom {
                padding: 16px 20px;
                flex-direction: column;
                text-align: center;
            }
            .float-cta {
                right: 16px;
                bottom: 16px;
                padding: 12px 18px;
                border-radius: var(--radius-pill);
            }
            .modal-box {
                padding: 28px 20px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .cat-hero-content {
                margin-left: 16px;
                padding-right: 16px;
            }
            .faq-question {
                padding: 18px 16px;
            }
            .faq-answer p {
                padding: 0 16px 20px;
            }
        }