:root{--c-bg:#fff;--c-bg-alt:#f6f6f7;--c-bg-soft:#f6f6f7;--c-t1:#3c3c43;--c-t2:#67676c;--c-t3:#929295;--c-div:#e2e2e3;--c-gut:#e2e2e3;--c-b1:#35664c;--c-b2:#2b563f;--c-bsoft:rgba(53,102,76,.1);--c-shadow:0 12px 32px rgba(0,0,0,.1);--font:"Segoe UI","Microsoft YaHei","PingFang SC",system-ui,sans-serif;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--c-bg:#1b1b1f;--c-bg-alt:#161618;--c-bg-soft:#202127;--c-t1:#dfdfd6;--c-t2:#98989f;--c-t3:#6a6a71;--c-div:#2e2e32;--c-gut:#000;--c-b1:#61d3a0;--c-b2:#78dfb0;--c-bsoft:rgba(97,211,160,.12);--c-shadow:0 12px 32px rgba(0,0,0,.4);color-scheme:dark}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:128px}
body{margin:0;min-height:100vh;background:var(--c-bg);color:var(--c-t1);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;border:0}
ul,ol{margin:0;padding:0}
.nav{position:sticky;top:0;z-index:30;height:64px;background:var(--c-bg);border-bottom:1px solid var(--c-gut)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 24px}
.brand{display:flex;align-items:center;gap:8px;flex-shrink:0;font-size:16px;font-weight:600;color:var(--c-t1)}
.brand img{width:24px;height:24px;border-radius:4px}
.nav-links{display:flex}
.nav-links a{padding:0 12px;font-size:14px;font-weight:500;line-height:64px;color:var(--c-t1);transition:color .25s}
.nav-links a:hover,.nav-links a.on{color:var(--c-b1)}
.local{position:sticky;top:64px;z-index:20;display:flex;align-items:center;justify-content:space-between;height:48px;padding:0 24px;background:var(--c-bg);border-bottom:1px solid var(--c-gut)}
.local summary,.toc-inline summary{display:flex;align-items:center;gap:6px;list-style:none;cursor:pointer;font-size:12px;font-weight:500;line-height:24px;color:var(--c-t2);padding:12px 0}
.local summary::-webkit-details-marker,.toc-inline summary::-webkit-details-marker{display:none}
.local summary::after,.toc-inline summary::after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:translateY(-2px) rotate(45deg)}
.local details[open]>summary,.toc-inline[open]>summary{color:var(--c-t1)}
.local details[open]>summary::after,.toc-inline[open]>summary::after{transform:translateY(1px) rotate(-135deg)}
.drop{position:absolute;left:0;right:0;top:48px;max-height:calc(100vh - 128px);overflow-y:auto;padding:16px 24px 24px;background:var(--c-bg);border-bottom:1px solid var(--c-gut);box-shadow:var(--c-shadow)}
.wrap{display:flex}
.side{display:none}
.sb-g{padding-bottom:16px}
.sb-g+.sb-g{padding-top:10px;border-top:1px solid var(--c-div)}
.sb-t{margin:0;padding:4px 0;font-size:14px;font-weight:700;line-height:24px;color:var(--c-t1)}
.sb ul{list-style:none}
.sb a{display:block;padding:4px 0;font-size:14px;font-weight:500;line-height:24px;color:var(--c-t2);transition:color .25s}
.sb a:hover{color:var(--c-t1)}
.sb a.on{color:var(--c-b1)}
.main{flex:1;min-width:0;padding:32px 24px 0}
.cols{display:flex;justify-content:center;margin:0 auto;max-width:992px}
.content{flex:1 1 auto;min-width:0;max-width:688px}
.toc{display:none}
.toc-inline{display:block;margin:0 0 24px;padding:0 16px;border:1px solid var(--c-div);border-radius:8px}.toc-inline .toc-l{padding-bottom:8px}
.toc-t{margin:0;font-size:14px;font-weight:600;line-height:32px;color:var(--c-t1)}
.toc-l{list-style:none}
.toc-l .toc-l{padding-left:12px}
.toc-l a{display:block;overflow:hidden;font-size:14px;line-height:32px;color:var(--c-t2);white-space:nowrap;text-overflow:ellipsis;transition:color .25s}
.toc-l a:hover{color:var(--c-b1)}
.doc h1{margin:0;font-size:28px;font-weight:600;line-height:40px;letter-spacing:-.02em}
.doc h2,.doc h3{position:relative;font-weight:600;outline:none}
.doc h2{margin:48px 0 16px;padding-top:24px;border-top:1px solid var(--c-div);font-size:24px;line-height:32px;letter-spacing:-.02em}
.doc h3{margin:32px 0 0;font-size:20px;line-height:28px;letter-spacing:-.01em}
.doc .header-anchor{position:absolute;top:0;left:0;margin-left:-.87em;font-weight:500;color:var(--c-b1);text-decoration:none;opacity:0;user-select:none;transition:opacity .25s}
.doc h2 .header-anchor{top:24px}
.doc h2:hover .header-anchor,.doc h3:hover .header-anchor,.doc .header-anchor:focus{opacity:1}
.doc p{margin:16px 0;line-height:28px}
.doc a{font-weight:500;color:var(--c-b1);text-decoration:underline;text-underline-offset:2px;transition:color .25s}
.doc a:hover{color:var(--c-b2)}
.doc strong{font-weight:600}
.doc ul,.doc ol{margin:16px 0;padding-left:1.25rem;line-height:28px}
.doc ul{list-style:disc}
.doc ol{list-style:decimal}
.doc li+li{margin-top:8px}
.doc li>ul,.doc li>ol{margin:8px 0 0}
.doc li>p{margin:0}
.doc .img a{display:inline-block;cursor:zoom-in}
.doc .img img{display:block;border-radius:8px}
.nf-q{color:var(--c-t2)}
.pager{display:grid;gap:16px;margin-top:64px;padding-top:24px;border-top:1px solid var(--c-div)}
.pg{display:flex;flex-direction:column;padding:11px 16px 13px;border:1px solid var(--c-div);border-radius:8px;transition:border-color .25s}
.pg:hover{border-color:var(--c-b1)}
.pg.next{align-items:flex-end;text-align:right}
.pg-d{font-size:12px;font-weight:500;line-height:20px;color:var(--c-t2)}
.pg-t{font-size:14px;font-weight:500;line-height:20px;color:var(--c-b1)}
.foot{margin-top:96px;padding:32px 24px;border-top:1px solid var(--c-gut);text-align:center;font-size:14px;line-height:24px;color:var(--c-t2)}
.foot p{margin:0}
@media (max-width:479px){.brand span{display:none}.nav-links a{padding:0 8px}}
@media (min-width:640px){.pager{grid-template-columns:repeat(2,1fr)}.pg.next{grid-column:2}}
@media (min-width:768px){.nav-in,.local{padding:0 32px}.main{padding:48px 32px 0}.doc h1{font-size:32px}}
@media (min-width:960px){.local{display:none}.side{display:block;position:sticky;top:64px;align-self:flex-start;flex:0 0 272px;width:272px;height:calc(100vh - 64px);overflow-y:auto;padding:32px 32px 32px;background:var(--c-bg-alt)}.main{padding:48px 64px 0}html{scroll-padding-top:80px}}
@media (min-width:1280px){.toc-inline{display:none}.toc{display:block;flex:0 0 256px;padding-left:32px}.toc-in{position:sticky;top:112px;max-height:calc(100vh - 144px);overflow-y:auto;padding-left:16px;border-left:1px solid var(--c-div)}}