:
root { --primary: #0052ff; --dark: #1a1a1a; --light
: #f8f9fa; --gray: #666; }
        * { box-sizing:
 border-box; margin: 0; padding: 0; }
        body { font-family: '
PingFang SC', 'Microsoft YaHei', sans-serif; line-height: 1.6; color: var
(--dark); background: #ffffff; }
        .container { max-width: 1200px
; margin: 0 auto; padding: 0 20px; }
        header { padding: 20px 
0; border-bottom: 1px solid #eee; background: #fff; position: sticky; top: 0
; z-index: 1000; }
        .nav-wrapper { display: flex; justify-content
: space-between; align-items: center; }
        .nav-links { display: flex; align
-items: center; gap: 0; }
        .nav-links a { padding: 10px 
15px; color: var(--dark); text-decoration: none; font-size: 14px; }
        .
hero { padding: 100px 0; text-align: center; background: linear-gradient(1
80deg, #f0f4ff 0%, #ffffff 100%); }
        .hero
 h1 { font-size: 48px; margin-bottom: 20px; }
        
.btn { display: inline-block; padding: 12px 30px; background: var(--primary);
 color: #fff; border-radius: 5px; text-decoration: none; transition: 0.3s
; }
        section { padding: 60px 0; }
        h2 { text-align: center; margin-
bottom: 40px; font-size: 32px; }
        .grid-4 { display: grid
; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr
)); gap: 30px; }
        .card { padding: 20px; border: 1px solid #eee
; border-radius: 10px; transition: 0.3s; }
        .card:
hover { box-shadow: 0 10px 20px rgba(0,0,0,0.
1); }
        .faq-item { margin-bottom: 15px; border-bottom: 1px solid #eee
; padding-bottom: 10px; }
        .faq-q { font-weight: bold; cursor
: pointer; padding: 10px 0; }
        .faq-a { display: none; padding
: 10px 0; color: var(--gray); }
        footer { padding: 40px 0; background
: #1a1a1a; color: #ccc; text-align: center; }