:root { --primary
: #0052ff; --dark: #1a1a1a; --light: #f8
f9fa; --text: #333; }
        * { box-sizing: border-box; margin:
 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans
-serif; line-height: 1.6; color: var(--text); background: #fff; }

        .container { max-width: 1200px; margin: 0 auto; padding: 0 
20px; }
        header { background: #fff; padding: 15px 0; border
-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 1000
; }
        nav { display: flex; align-items: center; justify-content: space-between; }
        
.nav-links { display: flex; gap: 0; align-items: center; }
        .
nav-links a { text-decoration: none; color: var(--text); padding: 0 15px;
 font-weight: 500; }
        .hero { padding: 80px 0; text
-align: center; background: linear-gradient(135deg, #f0f4ff 0%, #ffffff
 100%); }
        .hero h1 { font-size: 3rem; margin-bottom: 20
px; color: var(--dark); }
        .btn { display: inline-block; padding: 12px 30
px; background: var(--primary); color: #fff; border-radius: 50px; text-decoration: none; transition
: 0.3s; }
        section { padding: 60px 0; }
        .grid
 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1
fr)); gap: 30px; margin-top: 30px; }
        .card {
 padding: 30px; border: 1px solid #eee; border-radius: 12px; transition: 
0.3s; }
        .card:hover { transform: translateY(-5px); box-shadow: 0
 10px 30px rgba(0,0,0,0.1); }
        table
 { width: 100%; border-collapse: collapse; margin-top: 20px; }

        th, td { padding: 15px; border: 1px solid #eee; text-align: left;
 }
        .faq-item { margin-bottom: 15px; border-bottom: 1px solid #eee
; }
        .faq-q { padding: 15px; cursor: pointer; font-weight: bold
; background: #fdfdfd; }
        .faq-a { padding: 15px; display
: none; }
        footer { background: var(--dark); color: #ccc; padding: 40
px 0; text-align: center; }
        .ai-page-logo { width: 15
0px; }