:root{--brand:#FA4A24;--brand-d:#d83b18;--ink:#1A1A1A;--paper:#fff;--muted:#6b6b6b;--line:#ececec;--soft:#fff6f3}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:760px;margin:0 auto;padding:0 22px}
header.nav{position:sticky;top:0;background:rgba(26,26,26,.96);color:#fff;z-index:50}
.nav .wrap{max-width:1080px;display:flex;align-items:center;justify-content:space-between;height:56px}
.nav .brand{font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px}
.nav .brand img{height:24px}
.nav nav{display:flex;gap:14px;flex-wrap:wrap}
.nav nav a{color:#e8e8e8;font-size:13px}
.nav nav a:hover{color:var(--brand)}
.bread{font-size:13px;color:var(--muted);margin:22px 0 6px}
.bread a{color:var(--muted)}
main{padding:8px 0 40px}
h1{font-size:clamp(24px,4.6vw,34px);line-height:1.3;margin:6px 0 18px}
.lead{font-size:17px;color:#222;background:var(--soft);border-left:4px solid var(--brand);padding:16px 18px;border-radius:0 10px 10px 0;margin-bottom:26px}
h2{font-size:21px;margin:30px 0 12px}
p{margin-bottom:14px;color:#333}
ul,ol{margin:0 0 14px 22px;color:#333}
li{margin-bottom:6px}
.tag{display:inline-block;background:var(--brand);color:#fff;font-size:12px;padding:3px 12px;border-radius:20px;margin-bottom:4px;letter-spacing:.5px}
.rel{margin-top:34px;padding:20px;background:#fafafa;border:1px solid var(--line);border-radius:12px}
.rel h3{font-size:16px;margin-bottom:8px}
.rel a{display:block;padding:8px 0;border-bottom:1px solid var(--line);font-size:15px}
.rel a:last-child{border-bottom:0}
footer{background:var(--ink);color:#bdbdbd;padding:34px 0 26px;font-size:13px;margin-top:40px}
footer .wrap{max-width:1080px}
footer a{color:var(--brand)}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:200}
.skip:focus{left:0}
a:focus-visible,button:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
@media(max-width:760px){.nav nav{display:none}}