:root{--bg:#0d0e14;--panel:#161823;--line:#262938;--text:#ecedf3;--muted:#9a9fb4;--a1:#7c5cff;--a2:#ff5c8a;--err:#ff7a70}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif}
a{color:inherit}
.nav{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px max(16px,calc(50% - 560px));background:rgba(13,14,20,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav nav{display:flex;align-items:center;gap:18px}
.nav nav a{text-decoration:none;color:var(--muted);font-size:14px}
.nav nav a:hover{color:var(--text)}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;text-decoration:none}
.lang{background:transparent;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:4px 12px;font:inherit;font-size:13px;cursor:pointer}
.lang:hover{color:var(--text)}
.btn{display:inline-block;padding:11px 22px;border-radius:10px;border:0;font:inherit;font-weight:600;color:#fff!important;text-decoration:none;background:linear-gradient(135deg,var(--a1),var(--a2));cursor:pointer}
.btn.small{padding:7px 14px;font-size:14px}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--text)!important}
.btn.full{width:100%}
.btn[disabled]{opacity:.6}
.hero{max-width:1120px;margin:0 auto;padding:88px 16px 40px;text-align:center}
.tag{display:inline-block;margin:0 0 18px;padding:4px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:13px}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.15;margin:0 auto 18px;max-width:820px;background:linear-gradient(135deg,#fff,#c9c2ff 60%,#ffb3c7);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:680px;margin:0 auto 28px;color:var(--muted)}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.frame{display:flex;gap:18px;justify-content:center;margin-top:56px}
.phone{width:clamp(90px,18vw,170px);aspect-ratio:9/16;border-radius:18px;border:1px solid var(--line);background:linear-gradient(160deg,#241c4d,#3a1530 70%,#120f1f);padding:12px;display:flex;flex-direction:column;justify-content:flex-end;gap:7px}
.phone:nth-child(2){transform:translateY(-22px);background:linear-gradient(160deg,#1c2f4d,#2b1c4d 65%,#120f1f)}
.phone span{display:block;height:7px;border-radius:4px;background:rgba(255,255,255,.18)}
.phone span:nth-child(2){width:70%}.phone span:nth-child(3){width:45%}
.section{max-width:1120px;margin:0 auto;padding:64px 16px}
.section h2{font-size:clamp(22px,3vw,30px);margin:0 0 28px;text-align:center}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.grid article{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}
.grid h3{margin:0 0 8px;font-size:17px}
.grid p{margin:0;color:var(--muted);font-size:15px}
.steps{list-style:none;counter-reset:s;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.steps li{counter-increment:s;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;flex-direction:column;gap:6px}
.steps li::before{content:counter(s);width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:14px;background:linear-gradient(135deg,var(--a1),var(--a2))}
.steps span{color:var(--muted);font-size:15px}
details{max-width:760px;margin:0 auto 10px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 18px}
summary{cursor:pointer;font-weight:600}
details p{color:var(--muted);margin:10px 0 0}
.foot{display:flex;gap:16px;justify-content:center;padding:32px 16px 40px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.center{min-height:100vh;display:grid;place-items:center;padding:24px 16px}
.card{width:100%;max-width:400px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:30px 26px}
.cardhead{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}
.card h1{font-size:22px;margin:0 0 4px}
.muted{color:var(--muted);margin:0 0 20px}.small{font-size:13px;margin:16px 0 0}
label{display:block;margin-bottom:14px;font-size:13px;color:var(--muted)}
input{display:block;width:100%;margin-top:6px;padding:10px 12px;border-radius:9px;border:1px solid var(--line);background:#0f1018;color:var(--text);font:inherit}
input:focus{outline:2px solid var(--a1);outline-offset:-1px}
.err{color:var(--err);font-size:13px;margin:0 0 10px}
.doc{max-width:760px;margin:0 auto;padding:56px 16px}
.doc li,.doc p{color:var(--muted)}
@media (max-width:640px){.nav nav a:not(.btn){display:none}.frame{gap:10px}}