:root { --primary: #6366f1; --dark: #1e293b; --light: #f8fafc; --accent: #0ea5e9; }
        body { font-family: 'PingFang SC', sans-serif; margin: 0; color: #334155; line-height: 1.6; background-color: #ffffff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 0; border-bottom: 1px solid #e2e8f0; position: sticky; top: 0; background: rgba(255,255,255,0.95); z-index: 100; }
        nav { display: flex; justify-content: space-between; align-items: center; }
        .nav-links { display: flex; gap: 0; }
        .nav-links a { padding: 10px 15px; text-decoration: none; color: var(--dark); font-weight: 500; }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%); }
        h1 { font-size: 2.5rem; margin-bottom: 20px; color: var(--dark); }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: #fff; border-radius: 8px; text-decoration: none; margin-top: 20px; transition: 0.3s; }
        .btn:hover { background: var(--accent); }
        section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .card { padding: 30px; border: 1px solid #e2e8f0; border-radius: 16px; transition: 0.3s; }
        .card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); }
        .faq-item { margin-bottom: 15px; border: 1px solid #e2e8f0; border-radius: 8px; }
        .faq-q { padding: 15px; cursor: pointer; font-weight: bold; background: #f1f5f9; }
        footer { background: var(--dark); color: #fff; padding: 40px 0; text-align: center; }
        .ai-page-home-link { color: #fff; }