@font-face{font-family:GaohaoleTitle;src:url('/fonts/gaohaole-title.woff2') format('woff2');font-display:swap}
:root{color-scheme:light;--ink:#202d43;--muted:#66758a;--blue:#2367dc;--line:#dce4ef;--paper:#fff;--wash:#f5f8fc}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.9}a{color:var(--blue);text-underline-offset:5px}a:hover{color:#12479f}a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}img{max-width:100%}.skip{position:absolute;top:-80px;left:20px;padding:8px;background:white}.skip:focus{top:12px;z-index:2}.topbar{max-width:1160px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:24px 32px;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:700}.brand img{width:36px;height:36px;border-radius:10px}.topbar nav{display:flex;flex-wrap:wrap;gap:24px}.topbar nav a{font-size:14px;text-decoration:none}.layout{max-width:1160px;margin:auto;display:grid;grid-template-columns:190px minmax(0,760px);gap:64px;padding:62px 32px 90px}.toc{align-self:start;position:sticky;top:28px;font-size:14px}.toc strong{display:block;padding-bottom:16px;color:var(--muted);font-size:12px;letter-spacing:2px}.toc a{display:block;padding:8px 0;text-decoration:none;color:var(--muted)}.toc a[aria-current=page]{color:var(--blue);font-weight:700}.eyebrow{color:var(--blue);font-size:13px;letter-spacing:2px;margin:0 0 18px}h1{font-family:GaohaoleTitle,'Songti SC',serif;font-weight:500;font-size:clamp(34px,4vw,52px);line-height:1.35;letter-spacing:-1px;margin:0 0 24px}.lead{font-size:19px;line-height:1.9;color:#51617a;max-width:690px;margin-bottom:24px}.meta{font-size:13px;color:var(--muted);padding-bottom:30px;border-bottom:1px solid var(--line)}.start{display:inline-block;padding:10px 24px;background:var(--blue);color:white;border-radius:8px;text-decoration:none;font-weight:600;margin:6px 0 12px}.start:hover{color:white;background:#12479f}h2{font-size:25px;line-height:1.5;margin:44px 0 18px}h3{font-size:18px;margin:24px 0 10px}p{margin:12px 0}ul,ol{padding-left:24px}li{padding:4px 0}dl{margin:0}dl>div{display:grid;grid-template-columns:110px minmax(0,1fr);gap:20px;padding:15px 0;border-bottom:1px solid var(--line)}dt{color:var(--muted)}dd{margin:0;overflow-wrap:anywhere}.note{border-left:3px solid var(--blue);background:var(--wash);padding:16px 22px;margin:24px 0;color:#51617a}details{border-top:1px solid var(--line);padding:18px 0}details:last-of-type{border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:600}details p{color:#51617a}.related{margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}.related a{display:block;padding:8px 0}.footer{border-top:1px solid var(--line);max-width:1096px;margin:auto;padding:26px 0 38px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footer nav{display:flex;gap:18px;flex-wrap:wrap}.footer a{color:inherit}code{font:inherit;background:var(--wash);padding:2px 6px;border-radius:3px}
@media(max-width:760px){.topbar{padding:18px 22px;display:block}.topbar .brand{white-space:nowrap;margin-bottom:12px}.topbar nav{gap:20px}.layout{display:block;padding:34px 22px 54px}.toc{position:static;display:flex;flex-wrap:wrap;gap:8px 18px;border-bottom:1px solid var(--line);margin-bottom:34px;padding-bottom:16px}.toc strong{width:100%;padding-bottom:0}.toc nav{display:flex;flex-wrap:wrap;gap:8px 18px}.toc a{padding:2px 0}.lead{font-size:17px}.footer{margin:0 22px}dl>div{grid-template-columns:85px minmax(0,1fr);gap:12px}h2{margin-top:34px;font-size:23px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.product-shot{margin:32px 0}.product-shot img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:12px}.product-shot figcaption{font-size:12px;color:var(--muted);margin-top:8px}