body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #0a4275; font-size: 2.2em; text-align: center; }
        h2 { color: #1a73e8; margin-top: 30px; }
        h3 { color: #5f6368; }
        .nav { background: #0a4275; color: white; padding: 15px; position: sticky; top: 0; display: flex; justify-content: space-between; align-items: center; }
        .nav a { color: white; text-decoration: none; margin: 0 10px; }
        .mobile-nav-btn { display: none; }
        .攻略图片 { max-width: 100%; height: auto; margin: 20px 0; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; margin: 15px 0; background: #1a73e8; color: white; text-decoration: none; border-radius: 5px; }
        footer { margin-top: 40px; padding: 20px; background: #f1f3f4; text-align: center; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; }
            .mobile-nav-btn { display: block; margin-bottom: 10px; }
            .nav-links { display: none; }
            .nav-links.active { display: block; }
        }