:root{--bg:#e7e9eb;--ink:#252b33;--accent:#465b77;--panel:color-mix(in srgb,var(--bg) 93%,var(--ink));--muted:color-mix(in srgb,var(--ink) 70%,var(--bg));--line:color-mix(in srgb,var(--ink) 20%,var(--bg));--on:#ffffff;--font:Consolas,"Microsoft YaHei",monospace;--width:1220px;--cols:5;--radius:18px;color-scheme:light}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:25px}
body{margin:0;background:var(--bg);color:var(--ink);font:calc(16px*var(--reading-scale,1))/1.75 var(--font);overflow-wrap:anywhere}
a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}
button,input,select,textarea{font-family:inherit;color:inherit;max-width:100%}
button,a,input,select,textarea{touch-action:manipulation}
button{cursor:pointer}
img{max-width:100%;display:block}
h1,h2,h3,p,figure,blockquote,dl,dd{margin:0}
h1,h2,h3{line-height:1.25}
h1{font-size:clamp(34px,4.2vw,74px);letter-spacing:-.035em}
h2{font-size:clamp(23px,2.5vw,36px)}
h3{font-size:19px}
p{line-height:1.79}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.s794fc1c74-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.s794fc1c74-skip{position:absolute;left:15px;top:-100px;z-index:100;background:var(--accent);color:var(--on);padding:14px}
.s794fc1c74-skip:focus{top:15px}
.s794fc1c74-masthead{padding:26px 38px;border-bottom:1px solid var(--line)}
.s794fc1c74-floating-bar{max-width:var(--width);margin:auto;display:flex;align-items:center;justify-content:space-between;gap:30px}
.s794fc1c74-brand{display:flex;align-items:center;gap:14px;max-width:340px}
.s794fc1c74-brand img{flex-shrink:0}
.s794fc1c74-brand strong{font-size:23px;line-height:1.25;display:block}
.s794fc1c74-brand small{display:block;font-size:10px;line-height:1.75;color:var(--muted);margin-top:6px}
.s794fc1c74-nav{display:flex;gap:24px;flex-wrap:wrap;align-items:center}
.s794fc1c74-nav a{font-size:14px;white-space:nowrap;padding:8px 0}
.s794fc1c74-floating-bar{border:1px solid var(--line);border-radius:50px;padding:19px 29px;background:var(--panel)}
.s794fc1c74-search-jump{font-size:13px;white-space:nowrap}
.s794fc1c74-focus-mode .s794fc1c74-masthead,.s794fc1c74-focus-mode .s794fc1c74-site-footer{display:none}
.s794fc1c74-site-footer{width:min(var(--width),calc(100% - 64px));margin:72px auto 0;border-top:1px solid var(--line);padding:36px 0;display:flex;justify-content:space-between;align-items:start;gap:36px}
.s794fc1c74-site-footer nav{display:flex;gap:22px;flex-wrap:wrap;font-size:12px}
.s794fc1c74-site-footer p{font-size:12px;color:var(--muted);max-width:460px}
.s794fc1c74-site-footer small{display:block;font-size:10px;color:var(--muted);margin-top:12px}
.s794fc1c74-site-footer>header{width:100%;display:flex;justify-content:space-between;gap:24px}
.s794fc1c74-site-footer>section{max-width:650px}
@media(max-width:1000px){.s794fc1c74-site-footer{flex-wrap:wrap}}
@media(max-width:760px){.s794fc1c74-masthead{padding:20px 18px}
.s794fc1c74-brand strong{font-size:20px}
.s794fc1c74-brand small{font-size:9px}
.s794fc1c74-brand img{width:31px;height:31px}
.s794fc1c74-nav{gap:18px;flex-wrap:nowrap;overflow:auto}
.s794fc1c74-nav a{font-size:12px}
.s794fc1c74-floating-bar{border-radius:14px;padding:16px;flex-wrap:wrap;gap:17px}
.s794fc1c74-floating-bar>.s794fc1c74-nav{order:3;width:100%}
.s794fc1c74-site-footer{width:calc(100% - 32px);display:block;margin-top:45px}
.s794fc1c74-site-footer>div,.s794fc1c74-site-footer>nav{margin-top:25px}
.s794fc1c74-site-footer>header{display:block}
.s794fc1c74-site-footer>header>nav{margin-top:20px}
.s794fc1c74-site-footer>section+nav{margin-top:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*{transition:none!important}}
[data-card][hidden]{display:none!important}
.s794fc1c74-search-shortcut{font-family:inherit;font-size:12px;line-height:1.7;padding:10px 13px;border:1px solid var(--line);color:var(--ink);background:var(--panel);cursor:pointer}
.s794fc1c74-search-shortcut kbd{margin-left:10px;font:11px/1.7 monospace}
.s794fc1c74-search-shortcut{margin:16px 32px}