:
root { --primary: #ff4757; --accent: #2ed573; --dark
: #2f3542; --light: #f8f9fa; }
        * {
 margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family:
 'Segoe UI', Tahoma, sans-serif; line-height: 1.6; color: var(--dark); background: #
fff; }
        .container { max-width: 1200px; margin: 0 auto
; padding: 0 20px; }
        header { padding: 20px 0; background: rgba
(255,255,255,0.95); position: sticky; top: 0; z-
index: 1000; border-bottom: 1px solid #eee; }
        .nav
-wrapper { display: flex; justify-content: space-between; align-items: center; }
        .nav-links
 { display: flex; gap: 0; align-items: center; }
        .nav-links a { text
-decoration: none; color: var(--dark); padding: 10px 15px; font-
weight: 500; }
        .hero { padding: 100px 0; background: linear
-gradient(135deg, #fdfbfb 0%, #ebedee 100%); text
-align: center; }
        h1 { font-size: 3rem; margin-bottom: 
20px; color: var(--primary); }
        .btn { display: inline-block; padding: 12
px 30px; background: var(--primary); color: #fff; border-radius: 5px
; text-decoration: none; margin-top: 20px; transition: 0.3s; }

        .btn:hover { background: #ff6b81; transform: translateY(-2px); }

        .section { padding: 80px 0; }
        .grid { display: grid; grid
-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 3
0px; }
        .card { padding: 30px; border: 1px solid #eee
; border-radius: 10px; transition: 0.3s; background: #fff; }

        .card:hover { box-shadow: 0 10px 20px rgba(0
,0,0,0.1); }
        table { width: 100%; border-collapse
: collapse; margin-top: 20px; }
        th, td { padding: 15px; border: 
1px solid #ddd; text-align: left; }
        .faq-item { margin-bottom: 1
5px; border: 1px solid #eee; padding: 15px; }
        footer { background
: var(--dark); color: #fff; padding: 50px 0; text-align: center
; }
        .float-kefu { position: fixed; bottom: 30px; right: 3
0px; z-index: 999; }
        .ai-page-logo { width: 15
0px; }