/* DevOmni 官网 —— 与 App Store 商店图同一套设计语言 */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#05070F; --card:rgba(255,255,255,.055); --line:rgba(255,255,255,.12);
  --tx:#EAF0FF; --tx2:#98A4BE; --tx3:#6B7794;
  --cy:#3BE8D0; --bl:#5B8CFF; --pu:#B472FF;
}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--tx); overflow-x:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.65; -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* 背景光效 */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden}
.blob{position:absolute;border-radius:50%;filter:blur(140px);opacity:.5}
.b1{width:760px;height:760px;left:-240px;top:-220px;background:#2E6BFF}
.b2{width:680px;height:680px;right:-220px;top:60px;background:#7A2BFF;opacity:.42}
.b3{width:620px;height:620px;left:-160px;bottom:-140px;background:#16B6C8;opacity:.28}
.grid{position:absolute;inset:0;opacity:.14;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 80% 55% at 50% 25%,#000 30%,transparent 78%)}

/* 顶栏 */
header{position:sticky;top:0;z-index:20;backdrop-filter:blur(18px);
  background:rgba(5,7,15,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:21px;letter-spacing:-.01em}
.brand img{width:36px;height:36px;border-radius:10px}
.nav nav{display:flex;align-items:center;gap:26px;font-size:15px;color:var(--tx2)}
.nav nav a:hover{color:var(--tx)}
.langsel{background:var(--card);border:1px solid var(--line);color:var(--tx);
  border-radius:10px;padding:7px 10px;font-size:14px;cursor:pointer;font-family:inherit}
.langsel option{background:#0B1020}

/* 首屏 */
.hero{padding:104px 0 88px;text-align:center}
.kicker{font-size:13px;font-weight:700;letter-spacing:.28em;text-transform:uppercase;
  color:#7FD8F5;margin-bottom:22px}
h1{font-size:clamp(38px,6.2vw,68px);line-height:1.12;font-weight:800;letter-spacing:-.025em}
h1 .g{background:linear-gradient(96deg,#7FD8F5,#6E9CFF 46%,#B98CFF);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:26px auto 0;max-width:660px;font-size:clamp(16px,2.1vw,19px);color:var(--tx2)}
.cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:38px}
.btn{padding:14px 28px;border-radius:14px;font-weight:700;font-size:16px;
  border:1px solid var(--line);background:var(--card);transition:.18s}
.btn:hover{background:rgba(255,255,255,.1);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(96deg,#3B7BFF,#8B5BFF);border-color:transparent}
.btn.primary:hover{filter:brightness(1.1)}

/* 卡片区 */
section{padding:76px 0}
h2{font-size:clamp(26px,3.6vw,38px);font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.sublead{color:var(--tx2);font-size:17px;margin-bottom:40px;max-width:660px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:30px 28px}
.card .ic{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;
  justify-content:center;font-size:21px;margin-bottom:16px;
  background:rgba(91,140,255,.16);border:1px solid rgba(91,140,255,.3)}
.card h3{font-size:19px;font-weight:700;margin-bottom:9px}
.card p{color:var(--tx2);font-size:15px}

/* 代码块 */
.code{background:rgba(6,10,20,.8);border:1px solid var(--line);border-radius:18px;
  padding:24px 26px;overflow-x:auto;white-space:pre;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;line-height:1.85}
.code .k{color:var(--pu)} .code .s{color:var(--cy)} .code .c{color:var(--tx3)}

/* 正文页 */
.doc{padding:56px 0 96px;max-width:820px}
.doc h1{font-size:clamp(30px,4.4vw,44px);text-align:left;margin-bottom:10px}
.doc .upd{color:var(--tx3);font-size:14px;margin-bottom:40px}
.doc h2{font-size:22px;margin:40px 0 12px}
.doc h3{font-size:17px;margin:26px 0 8px;color:var(--tx)}
.doc p,.doc li{color:var(--tx2);font-size:16px}
.doc ul,.doc ol{margin:12px 0 12px 22px}
.doc li{margin-bottom:8px}
.doc table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px}
.doc th,.doc td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.doc th{background:rgba(255,255,255,.045);color:var(--tx);font-weight:700}
.doc td{color:var(--tx2)}
.doc strong{color:var(--tx)}
.note{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--cy);
  border-radius:12px;padding:18px 22px;margin:22px 0}
.note p{color:var(--tx2);font-size:15px}

footer{border-top:1px solid var(--line);padding:40px 0;color:var(--tx3);font-size:14px}
.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.foot nav{display:flex;gap:22px}
.foot a:hover{color:var(--tx2)}
@media(max-width:640px){
  .nav nav{gap:14px;font-size:14px}
  .nav nav a.hide-sm{display:none}
  section{padding:56px 0}
}