<style>
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background: #f9f7fe;
            color: #1c1a2e;
            line-height: 1.5;
        }
        :root {
            --primary: #ff552e;
            --primary-dark: #e03f1a;
            --secondary: #9f66ff;
            --secondary-dark: #7f44e0;
            --text-dark: #1f1b36;
            --text-muted: #5b577a;
            --border-light: #ede7fc;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        /* 头部导航 */
        .site-header {
            background: rgba(255,255,255,0.94);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-light);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 0.8rem 0;
        }
        .logo a {
            font-weight: 800;
            font-size: 1.5rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.3px;
        }
        .nav-links {
            display: flex;
            gap: 2rem;
            font-weight: 500;
        }
        .nav-links a { color: #2d2a48; transition: 0.2s; }
        .nav-links a:hover { color: var(--primary); }
        .btn-outline {
            border: 1px solid var(--primary);
            padding: 0.3rem 1rem;
            border-radius: 2rem;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            transition: 0.2s;
        }
        .btn-outline:hover { background: var(--primary); color: white; }
        /* 文章容器 */
        .article-container {
            max-width: 960px;
            margin: 2rem auto;
            background: white;
            border-radius: 2rem;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.02);
            border: 1px solid var(--border-light);
            overflow: hidden;
        }
        .article-inner {
            padding: 2rem 2rem 2.5rem;
        }
        /* 头部元信息 */
        .article-header {
            margin-bottom: 1.8rem;
            border-bottom: 1px solid var(--border-light);
            padding-bottom: 1rem;
        }
        .article-category {
            display: inline-block;
            background: #ff552e10;
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.2rem 0.8rem;
            border-radius: 30px;
            margin-bottom: 0.8rem;
        }
        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            background: linear-gradient(135deg, #262145, var(--secondary));
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            letter-spacing: -0.01em;
        }
        .article-meta {
            display: flex;
            gap: 1.2rem;
            color: var(--text-muted);
            font-size: 0.8rem;
            margin-top: 0.8rem;
            flex-wrap: wrap;
        }
        /* ========= GEO金字塔标题层级 (H1~H4) ========= */
        .article-body h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin: 1.8rem 0 0.8rem;
            border-left: 5px solid var(--primary);
            padding-left: 1rem;
            color: #262145;
        }
        .article-body h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin: 1.5rem 0 0.6rem;
            color: #3a3370;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 1rem 0 0.4rem;
            color: #5b4c9e;
        }
        .article-body p {
            margin-bottom: 1rem;
            color: #2c2947;
            line-height: 1.65;
        }
        /* 答案先行块 */
        .answer-first-block {
            background: #fff6f0;
            border-left: 6px solid var(--primary);
            padding: 1rem 1.5rem;
            border-radius: 1rem;
            margin: 1.2rem 0 1.8rem;
            font-weight: 500;
            font-size: 1.05rem;
            color: #2a2547;
        }
        /* 可扫描格式：列表/表格/引用块 */
        .structured-card {
            background: #fefaff;
            border-radius: 1.2rem;
            padding: 1rem 1.5rem;
            margin: 1.2rem 0;
            border: 1px solid #efe5ff;
        }
        .structured-card ul, .structured-card ol {
            padding-left: 1.5rem;
            margin: 0.5rem 0;
        }
        .structured-card li {
            margin-bottom: 0.4rem;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            background: #fdfcff;
            border-radius: 1rem;
            overflow: hidden;
            margin: 1.5rem 0;
            font-size: 0.9rem;
        }
        .data-table th, .data-table td {
            border: 1px solid #e2d9f2;
            padding: 0.75rem;
            text-align: left;
            vertical-align: top;
        }
        .data-table th {
            background: #f3edfc;
            font-weight: 700;
            color: #2a2547;
        }
        .highlight-tip {
            background: #eef2ff;
            border-radius: 1rem;
            padding: 1rem 1.2rem;
            border-left: 4px solid var(--secondary);
            margin: 1.2rem 0;
        }
        .faq-module {
            background: #f7f4ff;
            border-radius: 1.2rem;
            padding: 1.2rem;
            margin: 2rem 0 1rem;
        }
        .faq-item {
            margin-bottom: 1rem;
            border-bottom: 1px solid #e4dafc;
            padding-bottom: 0.8rem;
        }
        .faq-question {
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 0.3rem;
        }
        .author-section {
            display: flex;
            gap: 1rem;
            align-items: center;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 2px solid var(--border-light);
        }
        .footer {
            background: #1a172e;
            color: #cbc7e8;
            text-align: center;
            padding: 2rem;
            margin-top: 3rem;
            font-size: 0.8rem;
        }
        @media (max-width: 720px) {
            .article-inner { padding: 1.2rem; }
            .article-title { font-size: 1.7rem; }
            .article-body h2 { font-size: 1.4rem; }
            .nav-links { gap: 1rem; font-size: 0.85rem; }
            .container { padding: 0 1rem; }
        }
        .back-link {
            display: inline-block;
            margin: 1rem 0 0 1.5rem;
            color: var(--primary);
            font-weight: 500;
        }
    </style>