* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Microsoft YaHei',sans-serif; background:#FAFAFA; color:#333; line-height:1.7; }
.header { background:linear-gradient(90deg,#3F51B5,#2196F3); padding:22px; position:sticky; top:0; z-index:1000; }
.header-inner { max-width:1250px; margin:0 auto; display:flex; justify-content:space-between; align-items:center; }
.logo { font-size:30px; font-weight:700; color:white; }
.nav { display:flex; gap:30px; list-style:none; }
.nav a { color:white; text-decoration:none; padding:10px 20px; border-radius:4px; font-weight:500; transition:all 0.3s; }
.nav a:hover,.nav a.active { background:rgba(255,255,255,0.15); }
.hero { padding:100px 20px; text-align:center; background:linear-gradient(135deg,#3F51B5 0%,#2196F3 100%); color:white; }
.hero h1 { font-size:48px; margin-bottom:22px; }
.hero p { font-size:20px; max-width:700px; margin:0 auto 35px; opacity:0.9; }
.hero-btn { display:inline-block; background:white; color:#3F51B5; padding:15px 45px; border-radius:8px; text-decoration:none; font-weight:600; transition:all 0.3s; }
.hero-btn:hover { transform:translateY(-2px); box-shadow:0 8px 25px rgba(0,0,0,0.15); }
.section { padding:80px 20px; }
.section-alt { background:white; }
.section-title { text-align:center; font-size:36px; margin-bottom:50px; color:#3F51B5; }
.cards { max-width:1250px; margin:0 auto; display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:30px; }
.card { background:white; padding:40px; border-radius:12px; text-align:center; box-shadow:0 2px 15px rgba(0,0,0,0.06); transition:all 0.3s; border-top:3px solid #3F51B5; }
.card:hover { transform:translateY(-8px); box-shadow:0 10px 30px rgba(0,0,0,0.1); }
.card-icon { font-size:55px; margin-bottom:20px; }
.card h3 { font-size:22px; margin-bottom:15px; color:#3F51B5; }
.card p { color:#666; line-height:1.7; }
.footer { background:#3F51B5; color:white; padding:50px 20px 25px; margin-top:65px; }
.footer-inner { max-width:1250px; margin:0 auto; }
.footer-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:40px; margin-bottom:30px; }
.footer-col h4 { font-size:20px; margin-bottom:22px; }
.footer-col a { color:rgba(255,255,255,0.8); text-decoration:none; display:block; margin-bottom:10px; }
.footer-col a:hover { color:white; }
.copyright { text-align:center; padding-top:25px; border-top:1px solid rgba(255,255,255,0.15); }