* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Apple SD Gothic Neo', sans-serif;
            background: #f5f5f5;
            color: #333;
            line-height: 1.6;
        }
        .header {
            background: var(--primary, #7C3AED);
            color: white;
            padding: 16px 20px;
            position: sticky;
            top: 0;
            z-index: 100;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-back {
            font-size: 24px;
            cursor: pointer;
            text-decoration: none;
            color: white;
        }
        .header-title {
            font-size: 18px;
            font-weight: 600;
        }
        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
        }
        .card {
            background: white;
            border-radius: 12px;
            padding: 24px;
            margin-bottom: 16px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }
        .card h2 {
            font-size: 18px;
            color: var(--primary, #7C3AED);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary, #7C3AED);
        }
        .card h3 {
            font-size: 15px;
            color: #333;
            margin: 16px 0 8px;
        }
        .card p, .card li {
            font-size: 14px;
            color: #555;
            margin-bottom: 8px;
        }
        .card ul, .card ol {
            padding-left: 20px;
        }
        .update-date {
            text-align: center;
            color: #888;
            font-size: 13px;
            margin-top: 20px;
            padding-bottom: 40px;
        }
        .toc {
            background: #f8f9fa;
            padding: 16px;
            border-radius: 8px;
            margin-bottom: 20px;
        }
        .toc-title {
            font-weight: 600;
            margin-bottom: 10px;
        }
        .toc a {
            display: block;
            color: var(--primary, #7C3AED);
            text-decoration: none;
            padding: 4px 0;
            font-size: 14px;
        }