:root {
            --wba18-primary: #3d7eff;
            --wba18-primary-dark: #2a5cb3;
            --wba18-bg: #050505;
            --wba18-card-bg: #111111;
            --wba18-text: #e0e0e0;
            --wba18-text-dim: #999999;
            --wba18-border: #222222;
            --wba18-accent: #00f2ff;
            --wba18-gradient: linear-gradient(135deg, #3d7eff 0%, #00f2ff 100%);
            --wba18-max-width: 1300px;
        }

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

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

        /* 导航栏设计 */
        .wba18-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(5, 5, 5, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--wba18-border);
        }

        .wba18-nav-container {
            max-width: var(--wba18-max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

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

        .wba18-logo img {
            height: 32px;
            width: auto;
            border-radius: 4px;
        }

        .wba18-nav-links {
            display: flex;
            list-style: none;
            gap: 20px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .wba18-nav-links a {
            text-decoration: none;
            color: var(--wba18-text-dim);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

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

        .wba18-nav-links a.active {
            color: var(--wba18-primary);
            position: relative;
        }

        .wba18-nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--wba18-primary);
        }

        /* Hero 区：对角线分割设计 */
        .wba18-hero {
            padding: 160px 24px 80px;
            position: relative;
            background: radial-gradient(circle at 10% 20%, rgba(61, 126, 255, 0.1) 0%, transparent 40%);
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            min-height: 80vh;
            justify-content: center;
        }

        .wba18-hero-badge {
            background: rgba(61, 126, 255, 0.1);
            border: 1px solid var(--wba18-primary);
            color: var(--wba18-primary);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            margin-bottom: 24px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .wba18-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            max-width: 1000px;
            background: linear-gradient(to right, #fff, #888);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: break-word;
        }

        .wba18-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--wba18-text-dim);
            max-width: 700px;
            margin-bottom: 48px;
            word-break: break-word;
        }

        /* 核心模拟界面区 */
        .wba18-composer-visual {
            width: 100%;
            max-width: 1000px;
            background: #1a1a1a;
            border: 1px solid var(--wba18-border);
            border-radius: 12px;
            box-shadow: 0 40px 100px rgba(0,0,0,0.5);
            overflow: hidden;
            margin-top: 40px;
            position: relative;
        }

        .wba18-visual-header {
            background: #252525;
            padding: 12px 20px;
            display: flex;
            gap: 8px;
            border-bottom: 1px solid var(--wba18-border);
        }

        .wba18-dot { width: 12px; height: 12px; border-radius: 50%; }
        .wba18-dot.red { background: #ff5f56; }
        .wba18-dot.yellow { background: #ffbd2e; }
        .wba18-dot.green { background: #27c93f; }

        .wba18-visual-content {
            padding: 32px;
            text-align: left;
            font-family: 'Courier New', monospace;
        }

        .wba18-cmd-input {
            background: #000;
            border: 1px solid var(--wba18-primary);
            padding: 16px;
            border-radius: 8px;
            color: var(--wba18-accent);
            margin-bottom: 24px;
            box-shadow: 0 0 15px rgba(61, 126, 255, 0.2);
        }

        /* 图文交替区块 */
        .wba18-section {
            padding: 96px 24px;
            max-width: var(--wba18-max-width);
            margin: 0 auto;
        }

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

        .wba18-grid-content {
            flex: 1;
            min-width: 300px;
            word-break: break-word;
        }

        .wba18-grid-visual {
            flex: 1;
            min-width: 300px;
            background: var(--wba18-card-bg);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--wba18-border);
            transition: transform 0.3s ease;
        }

        .wba18-grid-visual:hover {
            transform: translateY(-10px);
            border-color: var(--wba18-primary);
        }

        .wba18-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 24px;
            color: #fff;
        }

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

        .wba18-step-item {
            display: flex;
            gap: 16px;
            margin-bottom: 32px;
        }

        .wba18-step-num {
            width: 36px;
            height: 36px;
            background: var(--wba18-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
        }

        /* 功能卡片区 */
        .wba18-features-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            margin-top: 64px;
        }

        .wba18-feature-card {
            background: var(--wba18-card-bg);
            border: 1px solid var(--wba18-border);
            padding: 32px;
            border-radius: 16px;
            transition: all 0.3s ease;
        }

        .wba18-feature-card:hover {
            background: #161616;
            border-color: #444;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }

        .wba18-feature-icon {
            font-size: 2rem;
            margin-bottom: 20px;
            color: var(--wba18-primary);
        }

        /* 底部CTA */
        .wba18-cta {
            background: var(--wba18-gradient);
            padding: 80px 24px;
            text-align: center;
            border-radius: 32px;
            margin: 80px 24px;
            color: #fff;
        }

        .wba18-btn {
            display: inline-block;
            padding: 16px 40px;
            background: #fff;
            color: var(--wba18-primary);
            text-decoration: none;
            font-weight: bold;
            border-radius: 8px;
            margin-top: 32px;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .wba18-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }

        /* 页脚 */
        .wba18-footer {
            border-top: 1px solid var(--wba18-border);
            padding: 64px 24px;
            background: #000;
        }

        .wba18-footer-inner {
            max-width: var(--wba18-max-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 40px;
        }

        .wba18-footer-brand h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

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

        .wba18-footer-group h4 {
            color: #fff;
            margin-bottom: 20px;
            font-size: 1rem;
        }

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

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

        .wba18-footer-group a {
            color: var(--wba18-text-dim);
            text-decoration: none;
            font-size: 0.9rem;
        }

        .wba18-footer-group a:hover {
            color: #fff;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .wba18-nav-links {
                display: none; /* 简化移动端，实际项目中需汉堡菜单 */
            }
            .wba18-grid-visual {
                order: -1;
            }
            .wba18-hero {
                padding-top: 120px;
            }
        }

        /* 动态内容标记样式 */
        [data-dynamic-content] {
            border-left: 4px solid var(--wba18-primary);
            padding-left: 20px;
        }