/* roulang page: index */
:root {
            --bg-primary: #0B1026;
            --bg-panel: #111A3D;
            --bg-deep: #070B1F;
            --accent-cyan: #22D3EE;
            --accent-orange: #F97316;
            --accent-blue: #2563EB;
            --text-main: #E6EAF6;
            --text-sub: #94A3B8;
            --border-glass: rgba(255, 255, 255, 0.08);
            --glass-bg: rgba(17, 26, 61, 0.55);
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35);
            --shadow-orange: 0 0 20px rgba(249, 115, 22, 0.4);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 8px 36px rgba(0, 0, 0, 0.55);
            --section-space: 96px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", 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-primary);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .container-site {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 40px;
            padding-right: 40px;
        }
        .section-space {
            padding-top: var(--section-space);
            padding-bottom: var(--section-space);
        }
        .section-title {
            font-size: 30px;
            font-weight: 600;
            letter-spacing: 0.02em;
            color: var(--text-main);
            line-height: 1.3;
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-sub);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
            line-height: 1.7;
        }
        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-card);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, #22D3EE, #0EA5E9);
            color: var(--bg-primary);
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-btn);
            background: transparent;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
        }
        .btn-outline:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.15);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }
        .btn-orange {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, #F97316, #EA580C);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-orange);
        }
        .btn-orange:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(249, 115, 22, 0.5);
        }
        .btn-orange:focus-visible {
            outline: 2px solid var(--accent-orange);
            outline-offset: 3px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-sub);
            letter-spacing: 0.02em;
        }
        .badge-cyan {
            background: rgba(34, 211, 238, 0.12);
            color: var(--accent-cyan);
            border-color: rgba(34, 211, 238, 0.3);
        }
        .badge-orange {
            background: rgba(249, 115, 22, 0.12);
            color: var(--accent-orange);
            border-color: rgba(249, 115, 22, 0.3);
        }
        /* 顶部导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: rgba(11, 16, 38, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 100;
            transition: all 0.3s ease;
        }
        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.02em;
        }
        .logo-brand .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #22D3EE, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.4);
        }
        .logo-brand:hover .logo-icon {
            box-shadow: 0 0 25px rgba(34, 211, 238, 0.6);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            font-size: 14px;
            color: var(--text-sub);
            font-weight: 500;
            padding: 6px 2px;
            position: relative;
            letter-spacing: 0.02em;
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--accent-cyan);
        }
        .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent-cyan), transparent);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .header-cta {
            margin-left: 12px;
            height: 40px;
            padding: 0 22px;
            font-size: 14px;
            border-radius: 8px;
            background: linear-gradient(135deg, #22D3EE, #0EA5E9);
            color: var(--bg-primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.3s ease;
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.25);
        }
        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(34, 211, 238, 0.4);
        }
        /* Hero */
        .hero {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            padding: 140px 0 100px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(30, 58, 138, 0.55), transparent 60%),
                radial-gradient(ellipse at 70% 70%, rgba(11, 16, 38, 0.7), transparent 70%),
                linear-gradient(180deg, rgba(11, 16, 38, 0.82) 0%, rgba(11, 16, 38, 0.75) 60%, rgba(11, 16, 38, 0.9) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }
        .hero h1 {
            font-size: clamp(28px, 5vw, 52px);
            font-weight: 700;
            letter-spacing: 0.02em;
            line-height: 1.2;
            margin-bottom: 24px;
            color: #fff;
        }
        .hero h1 .highlight {
            color: var(--accent-cyan);
            text-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 520px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 56px;
        }
        .hero-metrics {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .metric-pill {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 24px;
            border-radius: 999px;
            background: rgba(17, 26, 61, 0.55);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }
        .metric-pill .num {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1;
        }
        .metric-pill .unit {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.2;
        }
        .metric-pill .label {
            font-size: 13px;
            color: var(--text-main);
            border-left: 1px solid rgba(255, 255, 255, 0.15);
            padding-left: 10px;
        }
        /* 优惠阶梯 */
        .tiers-section {
            background: var(--bg-primary);
            position: relative;
        }
        .tiers-grid {
            display: flex;
            align-items: flex-end;
            gap: 28px;
            justify-content: center;
        }
        .tier-card {
            flex: 1;
            max-width: 360px;
            background: var(--bg-panel);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            padding: 32px;
            display: flex;
            flex-direction: column;
            position: relative;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }
        .tier-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .tier-card-basic {
            min-height: 380px;
        }
        .tier-card-pro {
            min-height: 440px;
            border: 1px solid rgba(34, 211, 238, 0.4);
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.15), var(--shadow-card);
        }
        .tier-card-pro:hover {
            box-shadow: 0 0 40px rgba(34, 211, 238, 0.25), var(--shadow-card-hover);
        }
        .tier-card-max {
            min-height: 500px;
        }
        .tier-badge {
            position: absolute;
            top: -14px;
            right: 24px;
            padding: 5px 16px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.05em;
        }
        .tier-badge-normal {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-sub);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .tier-badge-recommend {
            background: linear-gradient(135deg, #F97316, #EA580C);
            color: #fff;
            box-shadow: 0 0 20px rgba(249, 115, 22, 0.4);
        }
        .tier-name {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .tier-desc {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 24px;
            line-height: 1.6;
        }
        .tier-list {
            list-style: none;
            margin-bottom: 28px;
            flex-grow: 1;
        }
        .tier-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.5;
        }
        .tier-list li i {
            color: var(--accent-cyan);
            font-size: 13px;
            margin-top: 4px;
            flex-shrink: 0;
        }
        .tier-price {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
        }
        .tier-price .unit {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-sub);
            margin-left: 4px;
        }
        .tier-btn {
            display: block;
            width: 100%;
            height: 44px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: transparent;
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        .tier-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.2);
        }
        .tier-btn-pro {
            background: linear-gradient(135deg, #22D3EE, #0EA5E9);
            color: var(--bg-primary);
            font-weight: 600;
            border: none;
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.3);
        }
        .tier-btn-pro:hover {
            box-shadow: 0 0 25px rgba(34, 211, 238, 0.45);
            color: var(--bg-primary);
        }
        /* 套餐对比 */
        .compare-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, #080D20 100%);
        }
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: 16px;
        }
        .compare-table {
            width: 100%;
            min-width: 760px;
            border-collapse: collapse;
        }
        .compare-table th,
        .compare-table td {
            padding: 18px 24px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 14px;
        }
        .compare-table th {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-main);
            background: var(--bg-panel);
        }
        .compare-table td {
            color: var(--text-sub);
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table .row-label {
            font-weight: 500;
            color: var(--text-main);
            background: rgba(17, 26, 61, 0.4);
        }
        .compare-table .col-highlight {
            background: rgba(17, 26, 61, 0.55);
            border-left: 1px solid rgba(34, 211, 238, 0.3);
            border-right: 1px solid rgba(34, 211, 238, 0.3);
            position: relative;
            box-shadow: inset 0 0 30px rgba(34, 211, 238, 0.03);
        }
        .compare-table .col-highlight th {
            background: rgba(17, 26, 61, 0.7);
            border-bottom: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .compare-table .check-yes {
            color: var(--accent-cyan);
            font-size: 14px;
        }
        .compare-table .check-no {
            color: rgba(255, 255, 255, 0.2);
            font-size: 14px;
        }
        .compare-table .text-desc {
            font-size: 13px;
            color: var(--text-sub);
        }
        .compare-note {
            text-align: center;
            font-size: 13px;
            color: var(--text-sub);
            margin-top: 24px;
        }
        /* 限时入口 */
        .offer-section {
            position: relative;
            background: linear-gradient(180deg, #080D20 0%, #0B1026 100%);
            padding: 80px 0;
            overflow: hidden;
        }
        .offer-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(34, 211, 238, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(34, 211, 238, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
        }
        .offer-container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            padding: 48px 56px;
            border-radius: 20px;
            background: rgba(17, 26, 61, 0.55);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow-card);
        }
        .offer-text h3 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .offer-text p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            max-width: 420px;
        }
        .offer-right {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-shrink: 0;
        }
        .offer-img {
            width: 180px;
            height: 120px;
            border-radius: 16px;
            object-fit: cover;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        /* 最新动态 */
        .news-section {
            background: var(--bg-primary);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-panel);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            padding: 28px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(34, 211, 238, 0.2);
        }
        .news-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .news-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 10px;
            transition: color 0.3s;
        }
        .news-card:hover h3 {
            color: var(--accent-cyan);
        }
        .news-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 18px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .news-card-footer .date {
            font-size: 13px;
            color: var(--text-sub);
        }
        .news-card-footer .read-link {
            font-size: 14px;
            color: var(--accent-cyan);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.3s;
        }
        .news-card-footer .read-link:hover {
            gap: 10px;
        }
        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-panel);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--text-sub);
        }
        /* FAQ */
        .faq-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, #080D20 100%);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-panel);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(34, 211, 238, 0.2);
        }
        .faq-item.active {
            border-color: rgba(34, 211, 238, 0.35);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            user-select: none;
        }
        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-sub);
            transition: all 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 24px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        /* 咨询表单 */
        .contact-section {
            background: var(--bg-primary);
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }
        .contact-form {
            background: rgba(17, 26, 61, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-card);
            padding: 40px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .form-group label .required {
            color: var(--accent-orange);
            margin-left: 2px;
        }
        .form-input {
            width: 100%;
            height: 44px;
            padding: 0 16px;
            border-radius: 8px;
            background: rgba(17, 26, 61, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-main);
            font-size: 14px;
            font-family: inherit;
            transition: all 0.3s ease;
            outline: none;
        }
        .form-input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.25);
        }
        .form-input::placeholder {
            color: rgba(148, 163, 184, 0.5);
        }
        textarea.form-input {
            height: 110px;
            padding: 12px 16px;
            resize: vertical;
        }
        .form-footer {
            display: flex;
            justify-content: flex-end;
        }
        .form-message {
            font-size: 14px;
            margin-top: 12px;
            text-align: right;
        }
        .form-message.success {
            color: var(--accent-cyan);
        }
        .form-message.error {
            color: var(--accent-orange);
        }
        .contact-info-card {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 40px;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .contact-info-header {
            margin-bottom: 24px;
        }
        .contact-info-header h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .contact-info-header p {
            font-size: 14px;
            color: var(--text-sub);
        }
        .contact-info-list {
            list-style: none;
            margin-bottom: 28px;
        }
        .contact-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 14px;
            color: var(--text-main);
        }
        .contact-info-list li i {
            color: var(--accent-cyan);
            margin-top: 4px;
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }
        .contact-info-list li .info-label {
            display: block;
            font-size: 12px;
            color: var(--text-sub);
        }
        .qr-placeholder {
            width: 120px;
            height: 120px;
            border-radius: 12px;
            background: #1E293B;
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            font-size: 12px;
            color: var(--text-sub);
            margin-top: 16px;
        }
        /* 页脚 */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 64px;
            padding-bottom: 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-bottom: 56px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, #22D3EE, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.3);
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-nav h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .footer-nav ul {
            list-style: none;
        }
        .footer-nav li {
            margin-bottom: 8px;
        }
        .footer-nav a {
            font-size: 14px;
            color: var(--text-sub);
            transition: all 0.3s;
        }
        .footer-nav a:hover {
            color: var(--accent-cyan);
        }
        .footer-copyright {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            font-size: 13px;
            color: var(--text-sub);
        }
        /* 移动端底部Tab */
        .mobile-tab-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: rgba(11, 16, 38, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid rgba(34, 211, 238, 0.15);
            z-index: 100;
            padding-bottom: env(safe-area-inset-bottom);
        }
        .mobile-tab-bar .tab-inner {
            display: flex;
            align-items: center;
            justify-content: space-around;
            height: 56px;
        }
        .mobile-tab {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: var(--text-sub);
            font-size: 10px;
            transition: all 0.3s ease;
            padding: 4px 12px;
            border-radius: 10px;
        }
        .mobile-tab i {
            font-size: 20px;
            transition: all 0.3s ease;
        }
        .mobile-tab.active {
            color: var(--accent-cyan);
            text-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
        }
        .mobile-tab.active i {
            filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.5));
        }
        .mobile-tab:hover {
            color: var(--accent-cyan);
        }
        /* 响应式断点 */
        @media (max-width: 1024px) {
            .container-site {
                padding-left: 24px;
                padding-right: 24px;
            }
            .nav-links {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .mobile-tab-bar {
                display: block;
            }
            body {
                padding-bottom: 56px;
            }
            .hero {
                padding-bottom: 120px;
            }
            .hero-metrics {
                gap: 12px;
            }
            .metric-pill {
                padding: 10px 18px;
            }
            .tiers-grid {
                flex-direction: column;
                align-items: center;
            }
            .tier-card {
                max-width: 460px;
                width: 100%;
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .offer-container {
                flex-direction: column;
                text-align: center;
            }
            .offer-right {
                flex-direction: column;
                width: 100%;
            }
            .offer-img {
                width: 100%;
                height: 160px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .container-site {
                padding-left: 20px;
                padding-right: 20px;
            }
            .section-space {
                --section-space: 64px;
            }
            .section-title {
                font-size: 24px;
            }
            .hero {
                min-height: 80vh;
                padding-left: 20px;
                padding-right: 20px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .hero-buttons .btn-primary,
            .hero-buttons .btn-outline {
                width: 100%;
            }
            .hero-metrics {
                flex-direction: column;
                gap: 12px;
            }
            .metric-pill {
                width: 100%;
            }
            .compare-table-wrap {
                overflow-x: auto;
            }
            .compare-table {
                min-width: 650px;
            }
            .offer-container {
                padding: 32px 24px;
            }
            .contact-form {
                padding: 28px 20px;
            }
            .form-footer {
                justify-content: stretch;
            }
            .form-footer .btn-primary {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 40px;
            }
            .tier-card {
                padding: 24px 20px;
            }
            .news-card {
                padding: 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
            .offer-container {
                padding: 28px 20px;
            }
            .offer-img {
                height: 120px;
            }
            .contact-info-card {
                padding: 28px 20px;
            }
            .footer-brand {
                font-size: 18px;
            }
        }
        @media (min-width: 1025px) {
            .mobile-tab-bar {
                display: none;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0B1026;
            --color-panel: #111A3D;
            --color-accent: #22D3EE;
            --color-warning: #F97316;
            --color-text: #E6EAF6;
            --color-text-muted: #94A3B8;
            --color-card-line: rgba(255,255,255,0.08);
            --glass-bg: rgba(17,26,61,0.55);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --shadow-glass: 0 4px 24px rgba(0,0,0,0.4);
            --shadow-card: 0 8px 36px rgba(0,0,0,0.55);
            --shadow-accent: 0 0 20px rgba(34,211,238,0.35);
            --shadow-warning: 0 0 20px rgba(249,115,22,0.4);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--color-primary);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul, ol {
            list-style: none;
        }
        .container-site {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 40px;
        }
        @media (max-width: 768px) {
            .container-site {
                padding: 0 20px;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }
        .btn-primary {
            background: linear-gradient(135deg, #0891b2, #22d3ee);
            color: #04121A;
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(34,211,238,0.55);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.3);
            color: var(--color-text);
        }
        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            box-shadow: 0 0 16px rgba(34,211,238,0.15);
        }
        .btn-warning {
            background: linear-gradient(135deg, #ea580c, #f97316);
            color: #fff;
            box-shadow: var(--shadow-warning);
        }
        .btn-warning:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(249,115,22,0.55);
        }
        .btn-warning:active {
            transform: translateY(0);
        }
        .btn-sm {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        /* ===== 桌面导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 72px;
            background: rgba(11,16,38,0.65);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .header-inner {
            max-width: 1280px;
            margin: 0 auto;
            height: 100%;
            padding: 0 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--color-text);
            letter-spacing: 0.02em;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, #0891b2, #22d3ee);
            color: #04121A;
            font-size: 18px;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            position: relative;
            font-size: 14px;
            color: var(--color-text-muted);
            transition: color 0.3s ease;
            padding: 6px 0;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.3s ease;
        }
        .nav-link:hover {
            color: var(--color-accent);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: var(--color-accent);
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 42px;
            padding: 0 22px;
            border-radius: 10px;
            background: linear-gradient(135deg, #0891b2, #22d3ee);
            color: #04121A;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-accent);
        }
        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(34,211,238,0.5);
        }
        .header-cta:active {
            transform: translateY(0);
        }

        /* ===== 移动端底部Tab ===== */
        .mobile-tabs {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            height: calc(56px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            background: rgba(11,16,38,0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .mobile-tab-inner {
            display: flex;
            height: 100%;
            align-items: stretch;
        }
        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: #64748B;
            transition: color 0.25s ease;
            position: relative;
        }
        .tab-item .tab-icon {
            font-size: 20px;
            transition: text-shadow 0.25s ease;
        }
        .tab-item .tab-text {
            font-size: 10px;
            font-weight: 500;
            letter-spacing: 0.05em;
        }
        .tab-item.active {
            color: var(--color-accent);
        }
        .tab-item.active .tab-icon {
            text-shadow: 0 0 12px rgba(34,211,238,0.8);
        }
        .tab-item:hover {
            color: var(--color-accent);
        }

        /* ===== Hero 横幅 ===== */
        .hero-banner {
            position: relative;
            margin-top: 72px;
            min-height: 440px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .hero-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(30,58,138,0.55), rgba(11,16,38,0.88));
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 72px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .breadcrumb .sep {
            color: rgba(255,255,255,0.3);
        }
        .breadcrumb .current {
            color: var(--color-accent);
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--glass-bg);
            border: 1px solid var(--color-card-line);
            border-radius: var(--radius-tag);
            padding: 6px 16px;
            font-size: 13px;
            color: var(--color-accent);
            margin-bottom: 18px;
            backdrop-filter: blur(12px);
            letter-spacing: 0.04em;
        }
        .hero-title {
            font-size: clamp(30px, 4.5vw, 48px);
            font-weight: 700;
            line-height: 1.2;
            color: var(--color-text);
            letter-spacing: 0.02em;
            margin-bottom: 16px;
            max-width: 760px;
        }
        .hero-title .brand-mark {
            color: var(--color-accent);
        }
        .hero-subtitle {
            font-size: 18px;
            line-height: 1.6;
            color: #B8C1D9;
            max-width: 600px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 板块 ===== */
        .section-block {
            padding: 88px 0;
        }
        .section-block.alt-bg {
            background: #0A0F22;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-accent);
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            font-weight: 500;
        }
        .section-label::before {
            content: "";
            width: 24px;
            height: 1px;
            background: var(--color-accent);
        }
        .section-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.75;
            max-width: 760px;
        }

        /* ===== 分类简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .intro-image-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--color-card-line);
            box-shadow: var(--shadow-glass);
        }
        .intro-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
            transition: transform 0.5s ease;
        }
        .intro-image-wrap:hover img {
            transform: scale(1.02);
        }
        .intro-text .section-title {
            margin-bottom: 18px;
        }
        .intro-text p {
            color: var(--color-text-muted);
            margin-bottom: 16px;
            font-size: 16px;
        }
        .intro-points {
            margin-top: 24px;
        }
        .intro-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--color-text);
        }
        .intro-points li i {
            color: var(--color-accent);
            margin-top: 4px;
            font-size: 14px;
        }

        /* ===== 服务列表（左右错位） ===== */
        .service-list-section {
            background: #0A0F22;
        }
        .service-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
            padding: 48px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .service-row:last-child {
            border-bottom: none;
        }
        .service-row.reverse .service-image-wrap {
            order: 2;
        }
        .service-row.reverse .service-content {
            order: 1;
        }
        .service-image-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--color-card-line);
            box-shadow: var(--shadow-glass);
        }
        .service-image-wrap img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .service-image-wrap:hover img {
            transform: scale(1.03);
        }
        .service-tag {
            display: inline-block;
            background: rgba(34,211,238,0.12);
            border: 1px solid rgba(34,211,238,0.25);
            color: var(--color-accent);
            border-radius: var(--radius-tag);
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
        }
        .service-content h3 {
            font-size: 24px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .service-content p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text-muted);
            margin-bottom: 18px;
        }
        .service-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--color-accent);
            font-size: 14px;
            font-weight: 500;
            transition: gap 0.3s ease;
        }
        .service-link:hover {
            gap: 12px;
        }

        /* ===== 流程 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 32px;
        }
        .process-card {
            background: var(--glass-bg);
            border: 1px solid var(--color-card-line);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: all 0.3s ease;
            position: relative;
        }
        .process-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: rgba(34,211,238,0.3);
        }
        .process-number {
            font-size: 40px;
            font-weight: 700;
            color: transparent;
            -webkit-text-stroke: 1.5px rgba(34,211,238,0.6);
            margin-bottom: 14px;
            line-height: 1;
        }
        .process-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .process-card p {
            font-size: 14px;
            line-height: 1.65;
            color: var(--color-text-muted);
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .stats-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(11,16,38,0.9);
        }
        .stats-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .stat-item {
            text-align: center;
            padding: 36px 24px;
            border-radius: var(--radius-card);
            background: var(--glass-bg);
            border: 1px solid var(--color-card-line);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.2;
            display: block;
            margin-bottom: 6px;
        }
        .stat-number span {
            font-size: 20px;
            margin-left: 4px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--color-text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 36px auto 0;
        }
        .faq-item {
            border: 1px solid var(--color-card-line);
            border-radius: 14px;
            background: rgba(17,26,61,0.5);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }
        .faq-item:hover {
            border-color: rgba(34,211,238,0.3);
        }
        .faq-item.open {
            border-color: rgba(34,211,238,0.5);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            background: none;
            border: none;
            color: var(--color-text);
            font-size: 17px;
            font-weight: 500;
            text-align: left;
            cursor: pointer;
            transition: background 0.2s ease;
        }
        .faq-question:hover {
            background: rgba(34,211,238,0.06);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: -2px;
            border-radius: 14px;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(34,211,238,0.4);
            color: var(--color-accent);
            font-size: 14px;
            transition: all 0.35s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(34,211,238,0.15);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-answer-inner {
            padding: 0 28px 24px;
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.75;
            border-top: 1px solid rgba(255,255,255,0.06);
            margin-top: 0;
            padding-top: 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, #0A0F22, #0D1530);
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(34,211,238,0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(34,211,238,0.04) 1px, transparent 1px);
            background-size: 44px 44px;
        }
        .cta-wrapper {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            background: var(--glass-bg);
            border: 1px solid var(--color-card-line);
            border-radius: var(--radius-card);
            padding: 48px 56px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            flex-wrap: wrap;
        }
        .cta-content h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }
        .cta-content p {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 560px;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== 其他分类 ===== */
        .other-cats {
            padding: 40px 0 64px;
            background: #0A0F22;
        }
        .other-cats-title {
            font-size: 14px;
            color: var(--color-text-muted);
            text-align: center;
            margin-bottom: 16px;
            letter-spacing: 0.06em;
        }
        .other-cats-links {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
        }
        .other-cats-links a {
            font-size: 15px;
            color: var(--color-accent);
            transition: all 0.25s ease;
            padding: 6px 0;
            border-bottom: 1px solid transparent;
        }
        .other-cats-links a:hover {
            border-bottom-color: var(--color-accent);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #070B1F;
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 56px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
        }
        .footer-brand .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 16px;
            border-radius: 8px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-muted);
            max-width: 440px;
        }
        .footer-nav h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 16px;
        }
        .footer-nav ul {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px 24px;
        }
        .footer-nav a {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: color 0.25s ease;
            padding: 4px 0;
            display: inline-block;
        }
        .footer-nav a:hover {
            color: var(--color-accent);
        }
        .footer-copyright {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 24px;
            font-size: 13px;
            color: var(--color-text-muted);
            text-align: center;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .site-header {
                display: none;
            }
            .mobile-tabs {
                display: block;
            }
            .hero-banner {
                margin-top: 0;
                min-height: auto;
                padding-bottom: 80px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .intro-grid,
            .service-row,
            .service-row.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .service-row.reverse .service-image-wrap {
                order: 1;
            }
            .service-row.reverse .service-content {
                order: 2;
            }
            .section-block {
                padding: 64px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-wrapper {
                padding: 36px 28px;
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 640px) {
            .container-site {
                padding: 0 20px;
            }
            .header-inner {
                padding: 0 20px;
            }
            .hero-content {
                padding: 56px 0;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 20px 20px;
            }
            .section-title {
                font-size: 24px;
            }
            .intro-image-wrap img {
                min-height: 220px;
            }
            .service-image-wrap img {
                height: 200px;
            }
            .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .other-cats-links {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            .footer-copyright {
                padding-bottom: 76px;
            }
        }
        @media (max-width: 480px) {
            .stat-number {
                font-size: 34px;
            }
            .process-card {
                padding: 24px 20px;
            }
            .cta-content h2 {
                font-size: 22px;
            }
        }

/* roulang page: article */
:root {
        --primary: #0B1026;
        --panel: #111A3D;
        --panel-2: #151F4D;
        --accent: #22D3EE;
        --signal: #F97316;
        --text-main: #E6EAF6;
        --text-sub: #94A3B8;
        --text-weak: #64748B;
        --border-light: rgba(255, 255, 255, 0.08);
        --border-accent: rgba(34, 211, 238, 0.5);
        --glass-bg: rgba(17, 26, 61, 0.55);
        --radius-lg: 16px;
        --radius-md: 12px;
        --radius-sm: 8px;
        --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
        --shadow-hover: 0 8px 36px rgba(0, 0, 0, 0.55);
        --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35);
        --transition: all 0.3s ease;
    }
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        background: var(--primary);
        color: var(--text-main);
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: var(--transition);
    }
    img {
        max-width: 100%;
        display: block;
    }
    button,
    input,
    select,
    textarea {
        font-family: inherit;
        font-size: 100%;
    }
    .container-site {
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 40px;
    }
    /* ===== 顶部导航 ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        height: 72px;
        background: rgba(7, 11, 31, 0.72);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border-light);
    }
    .site-header .header-inner {
        height: 72px;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 700;
        letter-spacing: 0.02em;
        color: var(--text-main);
    }
    .logo-icon {
        width: 38px;
        height: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        background: linear-gradient(135deg, #1E3A8A, #2563EB);
        color: #fff;
        font-size: 18px;
        box-shadow: 0 0 16px rgba(37, 99, 235, 0.3);
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 32px;
    }
    .nav-links .nav-link {
        position: relative;
        font-size: 15px;
        color: var(--text-sub);
        padding: 8px 2px;
        font-weight: 500;
    }
    .nav-links .nav-link::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--accent);
        transition: var(--transition);
        box-shadow: 0 0 8px rgba(34, 211, 238, 0.5);
    }
    .nav-links .nav-link:hover,
    .nav-links .nav-link.active {
        color: var(--accent);
    }
    .nav-links .nav-link:hover::after,
    .nav-links .nav-link.active::after {
        width: 100%;
    }
    .header-cta {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: linear-gradient(135deg, #0891b2, #22D3EE);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        padding: 10px 22px;
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-glow);
        transition: var(--transition);
    }
    .header-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 0 28px rgba(34, 211, 238, 0.55);
        color: #fff;
    }
    .header-cta:active {
        transform: translateY(0);
        box-shadow: 0 0 12px rgba(34, 211, 238, 0.4);
    }
    .header-cta:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }
    /* ===== 文章页 ===== */
    .article-main {
        padding-top: 72px;
        min-height: 60vh;
    }
    .article-hero {
        background: linear-gradient(135deg, rgba(11, 16, 38, 0.92), rgba(17, 26, 61, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        padding: 72px 0 56px;
        border-bottom: 1px solid var(--border-light);
    }
    .article-hero-inner {
        max-width: 860px;
        margin: 0 auto;
    }
    .breadcrumb {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 13px;
        color: var(--text-sub);
        margin-bottom: 24px;
    }
    .breadcrumb a {
        color: var(--text-sub);
    }
    .breadcrumb a:hover {
        color: var(--accent);
    }
    .breadcrumb .sep {
        color: var(--text-weak);
    }
    .breadcrumb .current {
        color: var(--text-main);
        max-width: 320px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .category-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(34, 211, 238, 0.14);
        border: 1px solid var(--border-accent);
        color: var(--accent);
        font-size: 12px;
        font-weight: 600;
        padding: 5px 14px;
        border-radius: 999px;
        margin-bottom: 16px;
        letter-spacing: 0.04em;
    }
    .article-title {
        font-size: clamp(28px, 4vw, 40px);
        font-weight: 700;
        line-height: 1.3;
        letter-spacing: 0.01em;
        color: var(--text-main);
        margin-bottom: 20px;
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        font-size: 13px;
        color: var(--text-sub);
    }
    .article-meta span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .article-meta i {
        color: var(--accent);
        font-size: 14px;
    }
    .article-body-wrap {
        padding: 56px 40px 80px;
        max-width: 860px;
        margin: 0 auto;
    }
    .article-cover {
        border-radius: var(--radius-lg);
        overflow: hidden;
        margin-bottom: 40px;
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border-light);
    }
    .article-cover img {
        width: 100%;
        height: auto;
        aspect-ratio: 16 / 8;
        object-fit: cover;
    }
    .article-content {
        font-size: 16px;
        line-height: 1.85;
        color: #CBD5E1;
        text-align: justify;
        background: var(--primary);
    }
    .article-content h2 {
        font-size: 24px;
        font-weight: 700;
        color: var(--text-main);
        margin: 40px 0 16px;
        padding-left: 14px;
        border-left: 4px solid var(--accent);
        line-height: 1.4;
    }
    .article-content h3 {
        font-size: 20px;
        font-weight: 600;
        color: var(--text-main);
        margin: 32px 0 12px;
        line-height: 1.4;
    }
    .article-content p {
        margin-bottom: 20px;
        text-align: justify;
    }
    .article-content strong {
        color: var(--text-main);
        font-weight: 600;
    }
    .article-content a {
        color: var(--accent);
        border-bottom: 1px solid rgba(34, 211, 238, 0.3);
    }
    .article-content a:hover {
        border-bottom-color: var(--accent);
        color: #67E8F9;
    }
    .article-content blockquote {
        background: var(--panel);
        border-left: 4px solid var(--accent);
        border-radius: 0 12px 12px 0;
        padding: 18px 24px;
        margin: 28px 0;
        color: #A5B4D8;
        font-style: normal;
    }
    .article-content blockquote p {
        margin-bottom: 0;
    }
    .article-content ul,
    .article-content ol {
        margin: 20px 0;
        padding-left: 28px;
    }
    .article-content ul {
        list-style: none;
        padding-left: 0;
    }
    .article-content ul li {
        position: relative;
        padding-left: 24px;
        margin-bottom: 10px;
    }
    .article-content ul li::before {
        content: "";
        position: absolute;
        left: 2px;
        top: 10px;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--accent);
        box-shadow: 0 0 6px rgba(34, 211, 238, 0.4);
    }
    .article-content ol li {
        margin-bottom: 10px;
    }
    .article-content ol {
        list-style: decimal;
    }
    .article-content h2,
    .article-content h3 {
        text-align: left;
    }
    .article-content img {
        border-radius: 12px;
        max-width: 100%;
        height: auto;
        margin: 24px auto;
        box-shadow: var(--shadow-card);
    }
    .article-content hr {
        border: none;
        border-top: 1px solid var(--border-light);
        margin: 32px 0;
    }
    /* ===== 相关推荐 ===== */
    .related-section {
        margin-top: 64px;
        padding-top: 48px;
        border-top: 1px solid var(--border-light);
    }
    .related-section h2 {
        font-size: 22px;
        font-weight: 600;
        color: var(--text-main);
        margin-bottom: 28px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .related-section h2::before {
        content: "";
        width: 4px;
        height: 20px;
        background: var(--accent);
        border-radius: 2px;
        box-shadow: 0 0 8px rgba(34, 211, 238, 0.4);
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    .related-card {
        display: block;
        background: var(--panel);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: var(--transition);
    }
    .related-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(34, 211, 238, 0.3);
    }
    .related-card:active {
        transform: translateY(0);
    }
    .related-card:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }
    .related-card-img {
        aspect-ratio: 16 / 9;
        overflow: hidden;
        background: var(--panel-2);
    }
    .related-card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }
    .related-card:hover .related-card-img img {
        transform: scale(1.04);
    }
    .related-card-body {
        padding: 18px 20px 20px;
    }
    .related-card-body h3 {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-main);
        margin-bottom: 8px;
        line-height: 1.4;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .related-card-body p {
        font-size: 13px;
        color: var(--text-sub);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 12px;
    }
    .related-card-link {
        font-size: 13px;
        color: var(--accent);
        font-weight: 500;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .related-card-link i {
        font-size: 12px;
        transition: transform 0.3s ease;
    }
    .related-card:hover .related-card-link i {
        transform: translateX(4px);
    }
    .back-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: var(--text-sub);
        font-size: 14px;
        margin-top: 32px;
        transition: var(--transition);
    }
    .back-link:hover {
        color: var(--accent);
        gap: 12px;
    }
    .back-link:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 4px;
        border-radius: 4px;
    }
    /* ===== 内容未找到 ===== */
    .article-not-found {
        text-align: center;
        padding: 120px 20px;
    }
    .article-not-found i {
        font-size: 56px;
        color: var(--text-weak);
        margin-bottom: 20px;
        display: block;
    }
    .article-not-found p {
        font-size: 18px;
        color: var(--text-sub);
        margin-bottom: 24px;
    }
    .article-not-found .back-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: linear-gradient(135deg, #0891b2, #22D3EE);
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        padding: 12px 28px;
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-glow);
        margin-top: 0;
    }
    .article-not-found .back-link:hover {
        transform: translateY(-2px);
        box-shadow: 0 0 28px rgba(34, 211, 238, 0.5);
        color: #fff;
        gap: 8px;
    }
    /* ===== 页脚 ===== */
    .site-footer {
        background: #070B1F;
        border-top: 1px solid var(--border-light);
        padding: 64px 0 32px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 16px;
    }
    .footer-brand .logo-icon {
        width: 34px;
        height: 34px;
    }
    .footer-desc {
        font-size: 14px;
        color: var(--text-sub);
        line-height: 1.7;
        max-width: 460px;
    }
    .footer-nav h4 {
        font-size: 15px;
        color: var(--text-main);
        font-weight: 600;
        margin-bottom: 16px;
    }
    .footer-nav ul {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .footer-nav ul li a {
        font-size: 14px;
        color: var(--text-sub);
        transition: var(--transition);
    }
    .footer-nav ul li a:hover {
        color: var(--accent);
        padding-left: 4px;
    }
    .footer-nav ul li a:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
        border-radius: 4px;
    }
    .footer-copyright {
        font-size: 12px;
        color: var(--text-weak);
        border-top: 1px solid var(--border-light);
        padding-top: 24px;
        text-align: center;
    }
    /* ===== 移动端底部 Tab ===== */
    .mobile-tabbar {
        display: none;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 200;
        height: 56px;
        padding-bottom: env(safe-area-inset-bottom);
        background: rgba(7, 11, 31, 0.85);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-top: 1px solid var(--border-light);
    }
    .mobile-tabbar .tab-item {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2px;
        font-size: 10px;
        color: var(--text-weak);
        transition: var(--transition);
    }
    .mobile-tabbar .tab-item i {
        font-size: 20px;
        transition: var(--transition);
    }
    .mobile-tabbar .tab-item.active {
        color: var(--accent);
        text-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
    }
    .mobile-tabbar .tab-item.active i {
        filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.6));
    }
    .mobile-tabbar .tab-item:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: -2px;
        border-radius: 8px;
    }
    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .site-header {
            display: none;
        }
        .mobile-tabbar {
            display: flex;
        }
        .article-main {
            padding-top: 0;
            padding-bottom: 70px;
        }
        .article-hero {
            padding: 56px 0 40px;
        }
        .article-body-wrap {
            padding: 40px 20px 60px;
        }
        .container-site {
            padding: 0 20px;
        }
    }
    @media (max-width: 768px) {
        .article-title {
            font-size: 28px;
        }
        .article-meta {
            gap: 12px;
            font-size: 12px;
        }
        .related-grid {
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .related-card-img {
            aspect-ratio: 16 / 9;
        }
        .related-card-body {
            padding: 16px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
    }
    @media (max-width: 520px) {
        .article-hero {
            padding: 40px 0 32px;
        }
        .article-title {
            font-size: 24px;
        }
        .breadcrumb {
            font-size: 12px;
        }
        .article-meta {
            flex-direction: column;
            gap: 8px;
        }
        .article-content {
            font-size: 15px;
        }
        .article-content h2 {
            font-size: 20px;
        }
        .article-content h3 {
            font-size: 18px;
        }
        .related-section {
            margin-top: 40px;
            padding-top: 32px;
        }
        .related-section h2 {
            font-size: 18px;
        }
        .footer-nav ul {
            flex-direction: row;
            flex-wrap: wrap;
            gap: 16px;
        }
    }