:root{--ink:#16181d;--muted:#5f6672;--paper:#f6f7f8;--line:#dfe3e8;--green:#1f8f5f;--green-dark:#116341;--blue:#245ca6;--white:#fff;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;font-size:17px;line-height:1.78;text-wrap:pretty}
a{color:var(--blue);text-underline-offset:3px}a:hover{color:#173e73}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:16px;z-index:20;background:#fff;padding:10px 14px;border:2px solid var(--ink)}
.site-header{position:sticky;top:0;z-index:10;background:rgba(246,247,248,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav{max-width:1140px;margin:auto;padding:15px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand img{display:block;width:142px;height:auto}.nav-links{display:flex;gap:22px;align-items:center;font-size:15px}.nav-links a{color:var(--ink);text-decoration:none}.nav-links .download{background:var(--ink);color:#fff;border-radius:999px;padding:9px 16px}
.hero{max-width:1140px;margin:0 auto;padding:74px 24px 42px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:54px;align-items:end}.eyebrow{font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--green-dark)}h1{font-size:clamp(2.35rem,5vw,4.7rem);line-height:1.04;letter-spacing:-.045em;margin:15px 0 22px;max-width:900px}.lede{font-size:clamp(1.05rem,2vw,1.28rem);color:var(--muted);max-width:760px;margin:0}.status{background:#e7f3ed;border:1px solid #c8e4d7;border-radius:var(--radius);padding:22px}.status strong{display:block;margin-bottom:8px}.status p{font-size:14px;line-height:1.6;margin:0;color:#355246}
.layout{max-width:1140px;margin:0 auto 90px;padding:0 24px;display:grid;grid-template-columns:240px minmax(0,1fr);gap:52px}.toc{position:sticky;top:92px;align-self:start;border-top:2px solid var(--ink);padding-top:16px;font-size:14px}.toc strong{display:block;margin-bottom:10px}.toc a{display:block;color:var(--muted);text-decoration:none;padding:7px 0}.toc a:hover{color:var(--ink)}article{background:var(--white);border:1px solid var(--line);border-radius:26px;padding:clamp(26px,5vw,64px);box-shadow:0 16px 50px rgba(19,27,38,.06)}article h2{font-size:clamp(1.55rem,3vw,2.25rem);line-height:1.2;letter-spacing:-.025em;margin:2.5em 0 .65em;border-top:1px solid var(--line);padding-top:1.1em}article h2:first-child{margin-top:0;border-top:0;padding-top:0}article h3{font-size:1.18rem;line-height:1.35;margin:1.8em 0 .5em}article p,article li{max-width:760px}article li{margin:.45em 0}.steps{counter-reset:step;list-style:none;padding:0}.steps>li{position:relative;padding:4px 0 24px 58px;min-height:50px}.steps>li:before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:#fff;font-weight:800;font-size:14px}
.note,.warning,.source{max-width:820px;border-radius:14px;padding:18px 20px;margin:24px 0}.note{background:#edf6f1;border:1px solid #d1e7db}.warning{background:#fff6e5;border:1px solid #ecd8a9}.source{background:#f1f4f8;border:1px solid #dce2ea;font-size:14px;color:var(--muted)}code{font-family:"Cascadia Code",Consolas,monospace;font-size:.92em;background:#eef0f3;padding:.16em .38em;border-radius:5px;overflow-wrap:anywhere}.cmd{display:block;background:#171a20;color:#edf2f7;border-radius:12px;padding:16px 18px;overflow:auto}.faq details{border-top:1px solid var(--line);padding:17px 0}.faq summary{cursor:pointer;font-weight:750}.cta{margin-top:44px;background:var(--ink);color:#fff;border-radius:20px;padding:28px;display:flex;align-items:center;justify-content:space-between;gap:24px}.cta h2{color:#fff;border:0;padding:0;margin:0 0 5px}.cta p{margin:0;color:#cbd0d8}.cta a{display:inline-block;white-space:nowrap;background:#fff;color:var(--ink);text-decoration:none;font-weight:800;border-radius:999px;padding:12px 20px}
.footer{border-top:1px solid var(--line);padding:34px 24px;color:var(--muted);font-size:13px}.footer-inner{max-width:1140px;margin:auto;display:flex;justify-content:space-between;gap:24px}.footer p{margin:0;max-width:760px}
@media(max-width:850px){.hero{grid-template-columns:1fr;padding-top:52px}.status{max-width:520px}.layout{grid-template-columns:1fr}.toc{position:static;border:1px solid var(--line);border-radius:14px;padding:16px;background:#fff}.nav-links a:not(.download){display:none}.cta{align-items:flex-start;flex-direction:column}.footer-inner{flex-direction:column}}
@media(max-width:520px){body{font-size:16px}.nav,.hero,.layout{padding-left:18px;padding-right:18px}.brand img{width:126px}article{border-radius:18px;padding:26px 20px}.hero{gap:28px}.steps>li{padding-left:48px}.cta{padding:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}