*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #2d2d2d;
            background: #f8f9fa;
        }
        header {
            background: #1a1a2e;
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 16px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .logo span { color: #155DFC; }
        nav a {
            color: #ccc;
            text-decoration: none;
            font-size: 0.95rem;
            margin-left: 24px;
            transition: color 0.2s;
        }
        nav a:hover { color: #155DFC; }
        .container {
            max-width: 780px;
            margin: 0 auto;
            padding: 48px 24px 80px;
        }
        h1 {
            font-size: 2rem;
            font-weight: 800;
            color: #1a1a2e;
            margin-bottom: 12px;
        }
        .updated {
            font-size: 0.9rem;
            color: #888;
            margin-bottom: 40px;
        }
        h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #1a1a2e;
            margin-top: 40px;
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 2px solid #e5e7eb;
        }
        p, li {
            font-size: 1rem;
            margin-bottom: 14px;
            color: #444;
        }
        ul {
            padding-left: 24px;
            margin-bottom: 16px;
        }
        a { color: #155DFC; }
        footer {
            background: #1a1a2e;
            color: #999;
            text-align: center;
            padding: 32px 24px;
            font-size: 0.85rem;
        }
        footer a { color: #155DFC; text-decoration: none; }
    
        /* Dark Mode */
        [data-theme="dark"] { --navy: #0d0d1a; --navy-light: #0a0f1e; --text-primary: #e4e4e8; --text-secondary: #a0a0b8; --text-muted: #6a6a86; --surface: #1a1a2e; --surface-alt: #16213e; --border: #2a2a4e; --accent: #4d8aff; --accent-hover: #3a75e8; --accent-light: #1a2a4e; }
        [data-theme="dark"] body { background: #1a1a2e; color: #e4e4e8; }
        [data-theme="dark"] .ftc-banner { background: #16213e; border-color: #2a2a4e; color: #6a6a86; }
        [data-theme="dark"] img { opacity: 0.9; }