:root { --primary: #2563eb; --dark: #1e293b; --light: #f8fafc; }
        body { font-family: 'PingFang SC', sans-serif; color: #334155; line-height: 1.6; margin: 0; background: #ffffff; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 0; border-bottom: 1px solid #e2e8f0; display: flex; justify-content: space-between; align-items: center; }
        .nav-links { display: flex; gap: 0; }
        .nav-links a { padding: 0 15px; text-decoration: none; color: var(--dark); font-weight: 500; }
        .hero { padding: 80px 0; text-align: center; background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%); }
        h1 { font-size: 3rem; color: var(--dark); margin-bottom: 20px; }
        .btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: white; border-radius: 8px; text-decoration: none; transition: 0.3s; }
        section { padding: 60px 0; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 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 25px rgba(0,0,0,0.1); }
        .faq-item { margin-bottom: 20px; border-bottom: 1px solid #e2e8f0; padding-bottom: 10px; }
        footer { background: var(--dark); color: white; padding: 40px 0; text-align: center; }
        .ai-page-logo { width: 150px; }