:root {
            --wba18-primary: #3E7BFA;
            --wba18-secondary: #A855F7;
            --wba18-bg: #050505;
            --wba18-card-bg: #111111;
            --wba18-text: #F9FAFB;
            --wba18-text-dim: #A1A1AA;
            --wba18-border: #27272A;
            --wba18-accent: #22D3EE;
            --wba18-gap-base: 8px;
            --wba18-container-width: 1100px;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background-color: var(--wba18-bg);
            color: var(--wba18-text);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* 布局基础 */
        .wba18-container {
            max-width: var(--wba18-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--wba18-gap-base) * 3);
        }

        /* 导航栏 */
        .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 {
            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-menu {
            display: flex;
            flex-wrap: wrap;
            gap: calc(var(--wba18-gap-base) * 3);
            list-style: none;
            min-width: 0;
        }

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

        /* Hero 区块 - 独特非对称布局 */
        .wba18-hero {
            padding-top: 160px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 80% 20%, rgba(62, 123, 250, 0.15) 0%, transparent 50%);
            position: relative;
        }

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

        .wba18-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .wba18-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(to bottom right, #FFFFFF, #9CA3AF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .wba18-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(62, 123, 250, 0.1);
            border: 1px solid var(--wba18-primary);
            border-radius: 100px;
            color: var(--wba18-primary);
            font-size: 0.85rem;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* 教程主体 */
        .wba18-tutorial-main {
            padding: 64px 0;
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 64px;
        }

        /* 侧边导航 */
        .wba18-sidebar {
            position: sticky;
            top: 100px;
            height: fit-content;
        }

        .wba18-sidebar-title {
            font-size: 0.8rem;
            color: var(--wba18-text-dim);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 24px;
        }

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

        .wba18-toc-item {
            margin-bottom: 16px;
        }

        .wba18-toc-link {
            text-decoration: none;
            color: var(--wba18-text-dim);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all 0.3s;
        }

        .wba18-toc-link:hover {
            color: var(--wba18-text);
            transform: translateX(5px);
        }

        .wba18-toc-dot {
            width: 6px;
            height: 6px;
            background: var(--wba18-border);
            border-radius: 50%;
        }

        .wba18-toc-item.active .wba18-toc-dot {
            background: var(--wba18-primary);
            box-shadow: 0 0 10px var(--wba18-primary);
        }

        /* 步骤内容 */
        .wba18-content-area {
            min-width: 0;
        }

        .wba18-step-section {
            margin-bottom: 96px;
            scroll-margin-top: 120px;
        }

        .wba18-step-number {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--wba18-primary);
            margin-bottom: 12px;
            display: block;
        }

        .wba18-step-h2 {
            font-size: clamp(1.5rem, 2vw + 1rem, 2.2rem);
            margin-bottom: 24px;
            color: #FFF;
        }

        .wba18-step-desc {
            color: var(--wba18-text-dim);
            margin-bottom: 32px;
            font-size: 1.1rem;
        }

        .wba18-instruction-card {
            background: var(--wba18-card-bg);
            border: 1px solid var(--wba18-border);
            border-radius: 16px;
            padding: 32px;
            position: relative;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .wba18-instruction-card:hover {
            border-color: rgba(62, 123, 250, 0.4);
        }

        .wba18-code-block {
            background: #000;
            padding: 16px;
            border-radius: 8px;
            font-family: 'Fira Code', monospace;
            font-size: 0.9rem;
            color: var(--wba18-accent);
            margin: 20px 0;
            border-left: 3px solid var(--wba18-primary);
        }

        .wba18-tip {
            margin-top: 24px;
            padding: 16px;
            background: rgba(168, 85, 247, 0.05);
            border-radius: 12px;
            border: 1px dashed var(--wba18-secondary);
            font-size: 0.95rem;
        }

        /* 底部 CTA */
        .wba18-cta {
            padding: 80px 0;
            text-align: center;
            border-top: 1px solid var(--wba18-border);
        }

        .wba18-btn-primary {
            display: inline-block;
            padding: 16px 40px;
            background: var(--wba18-primary);
            color: #FFF;
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .wba18-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(62, 123, 250, 0.3);
        }

        /* 页脚 */
        .wba18-footer {
            padding: 64px 0 32px;
            border-top: 1px solid var(--wba18-border);
            background: #080808;
        }

        .wba18-footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            justify-content: space-between;
        }

        .wba18-footer-brand {
            flex: 1;
            min-width: 240px;
        }

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

        .wba18-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .wba18-footer-col {
            min-width: 140px;
        }

        .wba18-footer-col h4 {
            margin-bottom: 24px;
            font-size: 0.9rem;
            color: #FFF;
        }

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

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

        .wba18-footer-col a {
            color: var(--wba18-text-dim);
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.3s;
        }

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

        .wba18-copyright {
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid #1A1A1A;
            text-align: center;
            font-size: 0.8rem;
            color: var(--wba18-text-dim);
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .wba18-tutorial-main {
                grid-template-columns: 1fr;
            }
            .wba18-sidebar {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .wba18-nav-menu {
                display: none; /* 简化演示：移动端隐藏菜单 */
            }
            .wba18-hero-grid {
                flex-direction: column;
                align-items: flex-start;
            }
            .wba18-hero-title {
                font-size: 2.5rem;
            }
        }