:root{color-scheme:light;--text:#17212b;--sub:#52616f;--line:#e5e8e8;--paper:#fafbfa;--card:#fff;--accent:#112a3e}
*{box-sizing:border-box} html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"Noto Sans",sans-serif}
.wrap{max-width:1024px;margin:0 auto;padding:24px 24px 80px}header{border-bottom:1px solid var(--line);background:#fff}nav{max-width:1024px;margin:0 auto;padding:18px 24px;display:flex;gap:24px;justify-content:space-between;align-items:center;flex-wrap:wrap}
.brand{font-weight:750;letter-spacing:-.025em;font-size:19px}.mini-nav{display:flex;gap:18px;font-size:14px;flex-wrap:wrap}
a{color:#165c7c}nav a{color:var(--text);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:clamp(34px,5vw,56px);line-height:1.07;letter-spacing:-.045em;margin:22px 0 16px;max-width:850px}
h2{font-size:25px;line-height:1.25;letter-spacing:-.02em;margin:0 0 15px}h3{font-size:19px;line-height:1.25;margin:0 0 8px}
p{margin:0 0 14px}p.lead{font-size:19px;color:#3f4d58;max-width:810px;margin-bottom:23px}
.breadcrumbs{font-size:13px;color:var(--sub);margin:16px 0}.breadcrumbs a{color:inherit}
.pretitle{font-size:12px;text-transform:uppercase;letter-spacing:.14em;color:#52616f;font-weight:750;margin-top:24px}
.section{margin-top:36px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;min-width:0}
.card p,.small{font-size:14px;color:var(--sub)}.card p:last-child{margin-bottom:0}
.tag{display:inline-block;background:#f0f3f4;border:1px solid #e1e6e7;color:#445565;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600;margin-bottom:11px}
.button{display:inline-flex;background:#172b3b;color:#fff;text-decoration:none;padding:10px 15px;border-radius:9px;font-size:14px;font-weight:650;margin:5px 7px 5px 0;max-width:100%;word-break:break-word}.button.secondary{background:#fff;border:1px solid #c6cfd4;color:#193f56}
.button:hover{text-decoration:none;filter:brightness(.95)}.meta{font-size:12px;color:var(--sub);overflow-wrap:anywhere}
.steps{counter-reset:s;display:grid;gap:12px;padding:0;list-style:none}.steps>li{counter-increment:s;display:grid;grid-template-columns:30px 1fr;gap:12px;background:#fff;border:1px solid var(--line);border-radius:11px;padding:16px}
.steps>li:before{content:counter(s);background:#183e54;color:#fff;border-radius:99px;width:28px;height:28px;font-weight:bold;text-align:center;line-height:28px}
.note{padding:16px;background:#f0f4f5;border-left:3px solid #69828a;border-radius:4px;color:#374854}
code{font-size:13px;word-break:break-all;background:#eff3f3;padding:2px 5px;border-radius:4px}
.tabbar{display:flex;justify-content:flex-end;gap:9px}.tabbar button{font:inherit;padding:5px 12px;background:#fff;border:1px solid #ccd4d7;border-radius:7px;cursor:pointer}
.tabbar button[aria-pressed=true]{background:#15384e;color:#fff}
.lang-zh{display:none}body.zh .lang-en{display:none}body.zh .lang-zh{display:block}
.small-list{margin:0;padding-left:20px}.small-list li{padding:2px 0}footer{margin-top:55px;border-top:1px solid var(--line);padding-top:18px;font-size:13px;color:#65707b}
@media(max-width:620px){.wrap{padding:14px 18px 55px}nav{padding:15px 18px}p.lead{font-size:17px}.button{width:100%;justify-content:center}.tabbar{justify-content:flex-start}.cards{grid-template-columns:1fr}}