:root{
  --bg:#f6f7fb; --surface:#fff; --ink:#111827; --ink2:#374151; --muted:#6b7280;
  --line:#e5e7eb; --acc:#4f46e5; --acc2:#7c3aed; --acc-soft:#eef2ff; --ok:#059669;
  --r:14px; --f:"Inter","Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--f)}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.top{background:var(--surface);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:18px}
.brand img{width:34px;height:34px}
.brand span{white-space:nowrap}
.brand small{display:block;font-weight:500;font-size:12px;color:var(--muted);line-height:1.2}
nav a{color:var(--ink2);margin-left:18px;font-size:15px}
.hero{background:linear-gradient(135deg,#312e81,#4f46e5 55%,#7c3aed);color:#fff;padding:72px 0 64px}
.hero h1{font-size:40px;line-height:1.2;margin:0 0 14px;letter-spacing:-.01em}
.hero p{font-size:19px;max-width:760px;margin:0 0 10px;color:#e0e7ff}
.hero .zh{font-size:16px;color:#c7d2fe}
.pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.pill{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);border-radius:999px;padding:4px 12px;font-size:14px}
section{padding:56px 0}
section h2{font-size:28px;margin:0 0 8px}
section .lead{color:var(--muted);margin:0 0 28px;max-width:760px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.card h3{margin:0 0 6px;font-size:18px}
.card p{margin:0;color:var(--ink2);font-size:15px}
.alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
ul.checks{list-style:none;padding:0;margin:0}
ul.checks li{position:relative;padding-left:28px;margin:0 0 12px;color:var(--ink2)}
ul.checks li:before{content:"";position:absolute;left:4px;top:9px;width:12px;height:7px;border-left:2px solid var(--ok);border-bottom:2px solid var(--ok);transform:rotate(-45deg)}
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;position:relative;padding-left:44px;margin:0 0 16px;color:var(--ink2)}
.steps li:before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--acc-soft);color:var(--acc);font-weight:700;display:flex;align-items:center;justify-content:center}
.note{background:var(--acc-soft);border:1px solid #c7d2fe;border-radius:var(--r);padding:16px 18px;color:#3730a3;font-size:15px}
footer{padding:32px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer a{color:var(--muted);margin-right:16px}
article.doc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:36px 40px;margin:40px auto;max-width:860px}
article.doc h1{font-size:30px;margin:0 0 6px}
article.doc .meta{color:var(--muted);margin:0 0 26px}
article.doc h2{font-size:20px;margin:30px 0 8px}
article.doc p,article.doc li{color:var(--ink2)}
@media (max-width:640px){
  .hero{padding:48px 0 44px}
  .hero h1{font-size:30px}
  .hero p{font-size:17px}
  nav a{margin-left:12px;font-size:14px}
  nav a.opt{display:none}
  .brand small{display:none}
  article.doc{padding:24px 18px;margin:20px 0;border-radius:0;border-left:0;border-right:0}
}
/* 总指挥 10-18：下载按钮 */
nav a.dlnav{color:#fff;background:var(--acc);padding:6px 12px;border-radius:999px;font-weight:600}
nav a.dlnav:hover{text-decoration:none;background:var(--acc2)}
.cta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:26px}
.btn{display:inline-block;background:#fff;color:#312e81;font-weight:700;font-size:17px;padding:13px 28px;border-radius:12px}
.btn:hover{text-decoration:none;background:#eef2ff}
.btn.off{background:rgba(255,255,255,.25);color:#e0e7ff;cursor:default}
.meta{color:#c7d2fe;font-size:14px}
@media (max-width:640px){.btn{font-size:16px;padding:12px 20px}}