:root {
            --wba18-primary: #3dbeff;
            --wba18-secondary: #a259ff;
            --wba18-bg: #0a0a0a;
            --wba18-surface: #161616;
            --wba18-text: #e0e0e0;
            --wba18-text-dim: #999;
            --wba18-border: rgba(255, 255, 255, 0.1);
            --wba18-radius: 16px;
            --wba18-gap: 24px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--wba18-bg);
            color: var(--wba18-text);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局容器 */
        .wba18-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .wba18-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 10, 10, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--wba18-border);
        }

        .wba18-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            min-width: 0;
        }

        .wba18-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .wba18-logo img {
            height: 32px;
            width: auto;
            display: block;
        }

        .wba18-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            min-width: 0;
        }

        .wba18-nav a {
            color: var(--wba18-text-dim);
            text-decoration: none;
            font-size: 0.95rem;
            transition: color 0.3s ease;
            white-space: nowrap;
            padding: 8px 4px;
        }

        .wba18-nav a:hover, .wba18-nav a.wba18-active {
            color: var(--wba18-primary);
        }

        /* Hero 区块 - 独特仪表盘视觉 */
        .wba18-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at 50% -20%, rgba(61, 190, 255, 0.15), transparent 50%);
            text-align: center;
        }

        .wba18-hero-content {
            max-width: 800px;
            margin: 0 auto;
            word-break: break-word;
        }

        .wba18-hero h1 {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #fff 0%, #aaa 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }

        .wba18-hero p {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.4rem);
            color: var(--wba18-text-dim);
            max-width: 600px;
            margin: 0 auto 48px;
        }

        /* 额度可视化卡片 */
        .wba18-quota-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 64px;
        }

        .wba18-card {
            background: var(--wba18-surface);
            border: 1px solid var(--wba18-border);
            border-radius: var(--wba18-radius);
            padding: 40px;
            transition: transform 0.3s ease, border-color 0.3s ease;
            position: relative;
            overflow: hidden;
            min-width: 0;
        }

        .wba18-card:hover {
            transform: translateY(-8px);
            border-color: var(--wba18-primary);
        }

        .wba18-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--wba18-primary);
        }

        .wba18-card.wba18-premium::before {
            background: var(--wba18-secondary);
        }

        .wba18-card-tag {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--wba18-primary);
            margin-bottom: 16px;
            display: block;
        }

        .wba18-card h3 {
            font-size: 1.8rem;
            margin-bottom: 12px;
            font-weight: 700;
        }

        .wba18-card-value {
            font-size: 3rem;
            font-weight: 800;
            margin: 24px 0;
            color: #fff;
        }

        .wba18-card-desc {
            color: var(--wba18-text-dim);
            font-size: 1rem;
            word-break: break-word;
        }

        /* 动态内容区块 */
        .wba18-section {
            padding: 96px 0;
            border-top: 1px solid var(--wba18-border);
        }

        .wba18-flex-layout {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }

        .wba18-flex-col {
            flex: 1;
            min-width: 300px;
        }

        .wba18-section-title {
            font-size: 2.2rem;
            margin-bottom: 24px;
            font-weight: 700;
        }

        .wba18-feature-list {
            list-style: none;
        }

        .wba18-feature-item {
            margin-bottom: 20px;
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .wba18-feature-item span {
            color: var(--wba18-primary);
            font-weight: bold;
        }

        /* 订阅对比 */
        .wba18-table-wrapper {
            width: 100%;
            overflow-x: auto;
            margin-top: 40px;
            border-radius: var(--wba18-radius);
            background: var(--wba18-surface);
            border: 1px solid var(--wba18-border);
        }

        .wba18-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }

        .wba18-table th, .wba18-table td {
            padding: 20px;
            text-align: left;
            border-bottom: 1px solid var(--wba18-border);
        }

        .wba18-table th {
            background: rgba(255, 255, 255, 0.05);
            color: var(--wba18-text-dim);
            font-weight: 600;
        }

        /* FAQ */
        .wba18-faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 24px;
        }

        .wba18-faq-item {
            background: rgba(255, 255, 255, 0.03);
            padding: 32px;
            border-radius: var(--wba18-radius);
            min-width: 0;
        }

        .wba18-faq-item h4 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: #fff;
        }

        /* 页脚 */
        .wba18-footer {
            padding: 80px 0 40px;
            border-top: 1px solid var(--wba18-border);
            margin-top: 80px;
            text-align: center;
        }

        .wba18-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 24px;
            color: #fff;
        }

        .wba18-footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 32px;
            margin-bottom: 40px;
        }

        .wba18-footer-links a {
            color: var(--wba18-text-dim);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .wba18-footer-links a:hover {
            color: var(--wba18-primary);
        }

        .wba18-copyright {
            color: #555;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .wba18-header {
                padding: 10px 0;
            }
            .wba18-nav-wrapper {
                height: auto;
                flex-direction: column;
                gap: 12px;
            }
            .wba18-nav {
                justify-content: center;
                gap: 8px;
            }
            .wba18-nav a {
                font-size: 0.85rem;
            }
            .wba18-hero {
                padding: 140px 0 60px;
            }
            .wba18-flex-col {
                min-width: 100%;
            }
            .wba18-faq-grid {
                grid-template-columns: 1fr;
            }
        }