:root{
  --bg:#0f1626; --bg2:#16203a; --brand:#e23b3b; --brand2:#ff6b4a;
  --text:#e8edf5; --muted:#9fb0c8; --line:#27324d; --card:#141d33;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:linear-gradient(180deg,var(--bg),var(--bg2));color:var(--text);line-height:1.7;}
a{color:inherit;text-decoration:none}
.container{max-width:960px;margin:0 auto;padding:0 20px}
.site-header{position:sticky;top:0;z-index:10;background:rgba(15,22,38,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-size:22px;font-weight:800;letter-spacing:1px}
.brand span{color:var(--brand2)}
.nav a{margin-left:22px;color:var(--muted);font-size:15px}
.nav a:hover{color:var(--text)}
.hero{padding:72px 0 48px;text-align:center}
.hero h1{font-size:38px;margin:0 0 16px;font-weight:800}
.lead{font-size:17px;color:var(--muted);max-width:680px;margin:0 auto 28px}
.btn{display:inline-block;border:none;cursor:pointer;border-radius:8px;font-size:16px;padding:13px 26px;font-weight:700;transition:.15s}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
.btn-primary:hover{opacity:.92;transform:translateY(-1px)}
.main{padding:36px 0 64px}
h2{font-size:24px;margin:36px 0 14px}
h3{font-size:18px;margin:0 0 8px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px}
.card p{color:var(--muted);margin:0;font-size:15px}
.submit-block{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px;margin-top:20px}
.hint{color:var(--muted);font-size:14px}
.req{color:var(--brand2)}
form label{display:block;margin:16px 0 6px;font-weight:600;font-size:15px}
form input[type=text],form select,form textarea{
  width:100%;padding:12px 14px;border-radius:8px;border:1px solid var(--line);
  background:#0e1626;color:var(--text);font-size:15px;font-family:inherit}
form textarea{resize:vertical}
.agree{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:14px;color:var(--muted);margin-top:18px}
.agree input{margin-top:4px}
.hp{display:none!important}
.form-msg{margin:14px 0 0;font-size:14px;min-height:20px}
.form-msg.ok{color:#5fd38a}
.form-msg.err{color:#ff8a8a}
.site-footer{border-top:1px solid var(--line);padding:28px 0;margin-top:20px}
.footer-inner{display:flex;flex-direction:column;gap:8px}
.friend-links{font-size:14px;color:var(--muted)}
.friend-links a{color:var(--brand2);margin-left:6px}
.copyright{font-size:13px;color:var(--muted);margin:0}
.doc{max-width:760px}
.doc ul,.doc ol{padding-left:22px;color:var(--muted)}
.doc li{margin:6px 0}
.doc .lead{color:var(--text)}
.back{margin-top:24px}
.note{font-size:13px;color:var(--muted)}
@media(max-width:720px){.cards{grid-template-columns:1fr}.hero h1{font-size:30px}.nav a{margin-left:14px}}