:root {
            --wba18-primary: #3d5afe;
            --wba18-primary-dark: #2a3eb1;
            --wba18-bg: #0b0d11;
            --wba18-bg-card: #16191f;
            --wba18-text: #e0e0e0;
            --wba18-text-muted: #94a3b8;
            --wba18-border: #2d2e32;
            --wba18-accent: #a855f7;
            --wba18-gap: 8px;
            --wba18-container-width: 1100px;
        }

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

        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: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 布局基础 */
        .wba18-container {
            max-width: var(--wba18-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        .wba18-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 13, 17, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--wba18-border);
        }

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

        .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;
            flex-wrap: wrap;
            list-style: none;
            gap: 20px;
            min-width: 0;
        }

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

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

        .wba18-nav-links a.wba18-active {
            font-weight: 600;
        }

        /* Hero 区块 */
        .wba18-hero {
            padding-top: 160px;
            padding-bottom: 80px;
            text-align: center;
            background: radial-gradient(circle at 50% 0%, rgba(61, 90, 254, 0.15) 0%, transparent 50%);
        }

        .wba18-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(61, 90, 254, 0.1);
            border: 1px solid var(--wba18-primary);
            border-radius: 20px;
            color: var(--wba18-primary);
            font-size: 0.85rem;
            margin-bottom: 24px;
        }

        .wba18-hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            color: #fff;
            font-weight: 800;
        }

        .wba18-hero p {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.3rem);
            color: var(--wba18-text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 教程主体内容 */
        .wba18-tutorial-section {
            padding: 80px 0;
        }

        .wba18-grid-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .wba18-step-card {
            background: var(--wba18-bg-card);
            border: 1px solid var(--wba18-border);
            border-radius: 16px;
            padding: 40px;
            transition: transform 0.3s ease, border-color 0.3s ease;
            position: relative;
            min-width: 0;
        }

        .wba18-step-card:hover {
            transform: translateY(-5px);
            border-color: var(--wba18-primary);
        }

        .wba18-step-number {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 3rem;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.05);
            line-height: 1;
        }

        .wba18-step-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: #fff;
        }

        .wba18-step-card p {
            color: var(--wba18-text-muted);
            margin-bottom: 20px;
        }

        .wba18-code-snippet {
            background: #000;
            padding: 12px;
            border-radius: 8px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
            font-size: 0.85rem;
            color: #4ade80;
            border-left: 3px solid var(--wba18-primary);
        }

        /* 独特布局：图文分栏 */
        .wba18-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin: 96px 0;
        }

        .wba18-feature-row.wba18-reverse {
            flex-direction: row-reverse;
        }

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

        .wba18-feature-visual {
            flex: 1;
            min-width: 300px;
            background: linear-gradient(135deg, var(--wba18-primary-dark), var(--wba18-accent));
            height: 350px;
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            position: relative;
            overflow: hidden;
        }

        .wba18-feature-visual::after {
            content: "Extension Market";
            color: rgba(255,255,255,0.2);
            font-size: 4rem;
            font-weight: 800;
            transform: rotate(-15deg);
        }

        .wba18-feature-content h2 {
            font-size: 2.5rem;
            margin-bottom: 24px;
            color: #fff;
            line-height: 1.1;
        }

        .wba18-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }

        .wba18-tag {
            padding: 4px 12px;
            background: rgba(255,255,255,0.05);
            border: 1px solid var(--wba18-border);
            border-radius: 6px;
            font-size: 0.85rem;
            color: var(--wba18-text-muted);
        }

        /* 动态内容区块 */
        .wba18-dynamic-section {
            background: rgba(61, 90, 254, 0.03);
            padding: 80px 0;
            border-top: 1px solid var(--wba18-border);
            border-bottom: 1px solid var(--wba18-border);
        }

        .wba18-section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .wba18-section-title h2 {
            font-size: 2rem;
            color: #fff;
        }

        .wba18-article-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .wba18-article-card {
            flex: 1;
            min-width: 280px;
            background: var(--wba18-bg-card);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--wba18-border);
        }

        .wba18-article-card h4 {
            margin-bottom: 12px;
            color: #fff;
        }

        /* 页脚 */
        .wba18-footer {
            padding: 80px 0 40px;
            background: #050608;
            border-top: 1px solid var(--wba18-border);
        }

        .wba18-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 48px;
        }

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

        .wba18-footer-links h5 {
            color: #fff;
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

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

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

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

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

        .wba18-footer-bottom {
            padding-top: 40px;
            border-top: 1px solid var(--wba18-border);
            text-align: center;
            color: var(--wba18-text-muted);
            font-size: 0.9rem;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .wba18-nav-container {
                height: auto;
                padding: 16px 24px;
            }
            .wba18-nav-links {
                margin-top: 16px;
                gap: 12px;
            }
            .wba18-hero {
                padding-top: 120px;
            }
            .wba18-feature-row {
                margin: 48px 0;
            }
        }