:root{--brand:#0ea5e9;--ink:#0b1220;--muted:#64748b;--soft:#f6f8fb;}
*{box-sizing:border-box} html,body{margin:0} body{font-family:-apple-system,BlinkMacSystemFont,'Noto Sans SC','Microsoft YaHei',sans-serif;color:var(--ink)}
a{color:var(--brand);text-decoration:none}
.container{max-width:1160px;margin:0 auto;padding:0 16px}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:10px 16px;border-radius:12px}
.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.card{border:1px solid #e5e7eb;border-radius:16px;padding:18px;background:#fff}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.badge{display:inline-block;background:#e6f6fd;color:#0369a1;padding:4px 10px;border-radius:999px;font-size:12px;margin-right:8px}
header{position:sticky;top:0;background:#fff;z-index:1000;box-shadow:0 1px 0 #eee}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand .logo{width:28px;height:28px;border-radius:6px;background:var(--brand)}
.menu{display:flex;align-items:center;gap:24px}
.menu a{color:#0f172a;font-weight:700}
.menu .dropdown{position:relative}
.menu .dropdown:hover .dropdown-panel{display:block}
.dropdown-panel{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid #eee;border-radius:12px;padding:12px;min-width:240px;box-shadow:0 10px 30px rgba(0,0,0,.08)}
.dropdown-panel a{display:block;padding:8px 10px;color:#111}
.hero{background:linear-gradient(180deg,#0b1220,#171e2a);color:#fff;padding:70px 0 48px;border-bottom:1px solid #0f1623}
.hero h1{font-size:50px;margin:16px 0 12px} .hero p{color:#cbd5e1;font-size:18px}
.section{padding:44px 0} .section.gray{background:var(--soft)} .kv{display:flex;gap:18px;flex-wrap:wrap}
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px} .price-card{border:1px solid #e5e7eb;border-radius:16px;padding:18px;background:#fff} .price{font-size:30px;font-weight:900}
form .row{display:flex;gap:12px} form .row>div{flex:1} label{font-size:14px;color:#475569;margin:8px 0 6px;display:block}
input,select,textarea{width:100%;padding:10px;border:1px solid #e5e7eb;border-radius:10px} .help{color:#64748b;font-size:13px}
footer{padding:30px 0;color:#64748b;border-top:1px solid #eee;margin-top:40px}
@media(max-width:900px){.grid-3{grid-template-columns:1fr}.price-grid{grid-template-columns:1fr}.menu{display:none}.mobile-toggle{display:block}}
@media(min-width:901px){.mobile-toggle{display:none}}
.mobile-drawer{display:none;position:fixed;top:66px;left:0;right:0;background:#fff;border-top:1px solid #eee;box-shadow:0 10px 20px rgba(0,0,0,.06)}
.mobile-drawer a{display:block;padding:14px 16px;border-bottom:1px solid #f2f4f7;color:#0f172a;font-weight:700}