:root {
            --wba18-primary: #3CC7B4;
            --wba18-secondary: #2B87F0;
            --wba18-bg: #0A0A0C;
            --wba18-surface: #16161A;
            --wba18-text: #E2E2E6;
            --wba18-text-muted: #9BA1A6;
            --wba18-border: rgba(255, 255, 255, 0.1);
            --wba18-accent-gradient: linear-gradient(135deg, var(--wba18-primary), var(--wba18-secondary));
            --wba18-container: 1100px;
        }

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

        body {
            font-family: 'Inter', -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: break-word;
            overflow-wrap: break-word;
        }

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

        .wba18-nav-container {
            max-width: var(--wba18-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

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

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

        .wba18-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

        .wba18-nav-item a {
            text-decoration: none;
            color: var(--wba18-text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
            padding: 8px 4px;
        }

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

        /* 独特Hero布局：垂直居中卡片式 */
        .wba18-hero {
            padding: 160px 24px 80px;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            text-align: center;
            background: radial-gradient(circle at 50% 30%, rgba(60, 199, 180, 0.15) 0%, transparent 70%);
        }

        .wba18-hero-content {
            max-width: 900px;
            min-width: 0;
        }

        .wba18-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            background: var(--wba18-accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: keep-all;
        }

        .wba18-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--wba18-text-muted);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 核心入口网格 */
        .wba18-portal-grid {
            padding: 64px 24px;
            max-width: var(--wba18-container);
            margin: 0 auto;
        }

        .wba18-grid-wrapper {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            min-width: 0;
        }

        .wba18-portal-card {
            background: var(--wba18-surface);
            border: 1px solid var(--wba18-border);
            border-radius: 16px;
            padding: 32px;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            text-decoration: none;
            color: inherit;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
        }

        .wba18-portal-card:hover {
            transform: translateY(-8px);
            border-color: var(--wba18-primary);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }

        .wba18-card-tag {
            font-size: 0.75rem;
            text-transform: uppercase;
            color: var(--wba18-primary);
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.1em;
        }

        .wba18-card-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .wba18-card-desc {
            font-size: 0.95rem;
            color: var(--wba18-text-muted);
            margin-bottom: 24px;
        }

        /* 视觉特征区块 */
        .wba18-feature-split {
            padding: 96px 24px;
            max-width: var(--wba18-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

        .wba18-feature-text {
            flex: 1;
            min-width: 320px;
        }

        .wba18-feature-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
            height: 400px;
            background: linear-gradient(45deg, #16161A 0%, #1E1E24 100%);
            border-radius: 24px;
            border: 1px solid var(--wba18-border);
            overflow: hidden;
        }

        .wba18-visual-element {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 80%;
            height: 60%;
            background: rgba(60, 199, 180, 0.05);
            border: 1px solid rgba(60, 199, 180, 0.2);
            border-radius: 12px;
            display: flex;
            flex-direction: column;
            padding: 20px;
        }

        .wba18-visual-line {
            height: 8px;
            background: rgba(255, 255, 255, 0.05);
            margin-bottom: 12px;
            border-radius: 4px;
        }

        .wba18-visual-line.short { width: 40%; }
        .wba18-visual-line.medium { width: 70%; }
        .wba18-visual-line.accent { background: var(--wba18-primary); width: 55%; opacity: 0.6; }

        .wba18-section-title {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 24px;
            line-height: 1.2;
        }

        /* 动态内容区块 */
        .wba18-news-section {
            background: var(--wba18-surface);
            padding: 80px 24px;
        }

        .wba18-news-container {
            max-width: var(--wba18-container);
            margin: 0 auto;
        }

        .wba18-news-header {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 48px;
            gap: 16px;
        }

        /* 页脚设计 */
        .wba18-footer {
            border-top: 1px solid var(--wba18-border);
            padding: 64px 24px 32px;
            margin-top: 64px;
        }

        .wba18-footer-inner {
            max-width: var(--wba18-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .wba18-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .wba18-brand-name {
            font-size: 1.5rem;
            font-weight: 800;
            color: #FFF;
            margin-bottom: 16px;
        }

        .wba18-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
        }

        .wba18-link-group {
            min-width: 120px;
        }

        .wba18-group-title {
            font-size: 0.875rem;
            font-weight: 700;
            color: #FFF;
            margin-bottom: 24px;
            text-transform: uppercase;
        }

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

        .wba18-footer-list li {
            margin-bottom: 12px;
        }

        .wba18-footer-list a {
            color: var(--wba18-text-muted);
            text-decoration: none;
            transition: color 0.3s;
            font-size: 0.9rem;
        }

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

        .wba18-copyright {
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid var(--wba18-border);
            text-align: center;
            font-size: 0.85rem;
            color: var(--wba18-text-muted);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .wba18-nav-menu {
                display: none; /* 简化移动端，通常会有汉堡菜单 */
            }
            .wba18-feature-split {
                flex-direction: column;
                text-align: center;
            }
            .wba18-visual-element {
                width: 90%;
            }
        }

        /* 结构化数据辅助类 */
        .wba18-hidden { display: none; }