:root{
  --brand:#1d4ed8; --brand2:#4338ca; --ink:#1f2937; --muted:#6b7280;
  --bg:#f7f9ff; --card:#fff; --line:#e6ebf2; --ok:#16a34a; --bad:#dc2626;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:1040px;margin:0 auto;padding:0 18px}
header.nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:800;font-size:19px;color:var(--brand)}
.logo .dot{color:#f59e0b}
.nav nav a{margin-left:16px;color:var(--ink);font-size:14px;font-weight:600}
.hero{background:linear-gradient(135deg,#1d4ed8,#4338ca);color:#fff;padding:64px 0 56px;text-align:center}
.hero h1{font-size:34px;margin:0 0 14px;line-height:1.25}
.hero p{font-size:16px;opacity:.92;max-width:640px;margin:0 auto 24px}
.btn{display:inline-block;padding:12px 22px;border-radius:10px;font-weight:700;font-size:15px;cursor:pointer;border:none}
.btn-brand{background:var(--brand);color:#fff}
.btn-brand:hover{background:#1742b8}
.btn-ghost{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.28)}
.btn-block{width:100%;text-align:center}
section{padding:46px 0}
.sec-head{text-align:center;margin-bottom:28px}
.sec-head h2{font-size:26px;margin:0 0 8px}
.sec-head p{color:var(--muted);margin:0}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}
.card .ic{font-size:30px}
.card h3{margin:10px 0 6px;font-size:18px}
.card p{color:var(--muted);font-size:14px;margin:0}
.pricing{background:linear-gradient(135deg,#eef2ff,#f5f3ff);text-align:center}
.price-box{background:#fff;border:2px solid var(--brand);border-radius:20px;padding:34px;max-width:440px;margin:0 auto}
.price-box .amt{font-size:46px;font-weight:800;color:var(--brand)}
.price-box .amt small{font-size:18px;color:var(--muted);font-weight:600}
.feat{text-align:left;margin:18px 0;padding-left:0;list-style:none}
.feat li{padding:6px 0 6px 26px;position:relative;font-size:15px}
.feat li:before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.form{max-width:420px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
.form label{display:block;font-size:14px;font-weight:600;margin:14px 0 6px}
.form input,.form select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px}
.form .err{color:var(--bad);font-size:13px;min-height:18px;margin-top:6px}
.muted{color:var(--muted);font-size:13px;text-align:center;margin-top:14px}
.foot{text-align:center;color:var(--muted);font-size:13px;padding:30px 0;border-top:1px solid var(--line)}
.badge{display:inline-block;background:#fff3;color:#fff;padding:4px 12px;border-radius:999px;font-size:13px;margin-bottom:14px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#1f2937;color:#fff;padding:12px 20px;border-radius:10px;font-size:14px;opacity:0;transition:.3s;pointer-events:none;z-index:50}
.toast.show{opacity:1}
/* app 结果卡片 */
.result{margin-top:24px}
.pick{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:14px;border-left:5px solid var(--brand)}
.pick h4{margin:0 0 6px;font-size:17px}
.score{float:right;font-weight:800;font-size:20px;color:var(--brand)}
.bar{height:8px;background:#eef2ff;border-radius:6px;overflow:hidden;margin:10px 0}
.bar > i{display:block;height:100%;background:linear-gradient(90deg,#1d4ed8,#4338ca)}
.kv{display:flex;gap:18px;flex-wrap:wrap;font-size:14px;color:var(--muted);margin:8px 0}
.kv b{color:var(--ink)}
.tag{display:inline-block;font-size:12px;padding:2px 9px;border-radius:999px;background:#eef2ff;color:#4338ca;margin-right:6px}
.note{font-size:13px;color:var(--muted);background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:10px 12px;margin-top:10px}
@media(max-width:760px){.grid3{grid-template-columns:1fr}.hero h1{font-size:26px}}