:root{--bg:#edf4f8;--ink:#163348;--accent:#136f9d;--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:Arial,"Microsoft YaHei",sans-serif;--width:1180px;--cols:5;--radius:12px;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:1.31}
h1{font-size:clamp(34px,4.2vw,75px);letter-spacing:-.035em}
h2{font-size:clamp(24px,2.5vw,36px)}
h3{font-size:19px}
p{line-height:1.94}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.s3a4162ba0-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.s3a4162ba0-skip{position:absolute;left:15px;top:-100px;z-index:100;background:var(--accent);color:var(--on);padding:11px}
.s3a4162ba0-skip:focus{top:15px}
.s3a4162ba0-masthead{padding:20px 29px;border-bottom:1px solid var(--line)}
.s3a4162ba0-brand{display:flex;align-items:center;gap:11px;max-width:340px}
.s3a4162ba0-brand img{flex-shrink:0}
.s3a4162ba0-brand strong{font-size:24px;line-height:1.31;display:block}
.s3a4162ba0-brand small{display:block;font-size:10px;line-height:1.89;color:var(--muted);margin-top:4px}
.s3a4162ba0-nav{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.s3a4162ba0-nav a{font-size:14px;white-space:nowrap;padding:6px 0}
.s3a4162ba0-search{display:flex;border:1px solid var(--line);background:var(--panel);max-width:280px;min-width:0}
.s3a4162ba0-search label{flex:1;min-width:0}
.s3a4162ba0-search input{width:100%;padding:11px;border:0;background:transparent;font-size:13px;min-width:0}
.s3a4162ba0-search button{border:0;border-left:1px solid var(--line);padding:9px;background:transparent;color:var(--accent);white-space:nowrap}
.s3a4162ba0-utility{display:flex;justify-content:space-between;gap:18px;font-size:11px;color:var(--muted);max-width:var(--width);margin:0 auto 13px}
.s3a4162ba0-mast-2{position:fixed;left:0;top:0;bottom:0;width:230px;background:var(--bg);border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:25;padding:25px 20px}
.s3a4162ba0-mast-2 .s3a4162ba0-brand{display:block}
.s3a4162ba0-mast-2 .s3a4162ba0-brand img{margin-bottom:13px}
.s3a4162ba0-mast-2 .s3a4162ba0-nav{display:grid;gap:5px;margin:22px 0}
.s3a4162ba0-rail-bottom{margin-top:auto}
.s3a4162ba0-rail-bottom .s3a4162ba0-utility{display:block;margin-top:14px}
.s3a4162ba0-focus-mode .s3a4162ba0-masthead,.s3a4162ba0-focus-mode .s3a4162ba0-site-footer{display:none}
.s3a4162ba0-site-footer{width:min(var(--width),calc(100% - 64px));margin:54px auto 0;border-top:1px solid var(--line);padding:27px 0;display:flex;justify-content:space-between;align-items:start;gap:27px}
.s3a4162ba0-site-footer nav{display:flex;gap:16px;flex-wrap:wrap;font-size:12px}
.s3a4162ba0-site-footer p{font-size:12px;color:var(--muted);max-width:460px}
.s3a4162ba0-site-footer small{display:block;font-size:10px;color:var(--muted);margin-top:9px}
.s3a4162ba0-site-footer>header{width:100%;display:flex;justify-content:space-between;gap:18px}
.s3a4162ba0-site-footer>section{max-width:650px}
@media(max-width:1000px){.s3a4162ba0-site-footer{flex-wrap:wrap}}
@media(max-width:760px){.s3a4162ba0-mast-2{position:static;width:auto;display:block;border-right:0;border-bottom:1px solid var(--line);padding:18px}
.s3a4162ba0-mast-2 .s3a4162ba0-brand{display:flex}
.s3a4162ba0-mast-2 .s3a4162ba0-brand img{margin:0}
.s3a4162ba0-mast-2 .s3a4162ba0-nav{display:flex;overflow:auto;flex-wrap:nowrap;margin:14px 0}
.s3a4162ba0-rail-bottom{display:none}
.s3a4162ba0-masthead{padding:16px 14px}
.s3a4162ba0-brand strong{font-size:20px}
.s3a4162ba0-brand small{font-size:9px}
.s3a4162ba0-brand img{width:31px;height:31px}
.s3a4162ba0-nav{gap:14px;flex-wrap:nowrap;overflow:auto}
.s3a4162ba0-nav a{font-size:12px}
.s3a4162ba0-site-footer{width:calc(100% - 32px);display:block;margin-top:36px}
.s3a4162ba0-site-footer>div,.s3a4162ba0-site-footer>nav{margin-top:20px}
.s3a4162ba0-site-footer>header{display:block}
.s3a4162ba0-site-footer>header>nav{margin-top:16px}
.s3a4162ba0-site-footer>section+nav{margin-top:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*{transition:none!important}}
.s3a4162ba0-masthead{background:var(--panel)}
[data-card][hidden]{display:none!important}
.s3a4162ba0-reading-progress{display:flex;align-items:center;gap:11px;font-size:11px;width:min(420px,100%);margin:13px 0}
.s3a4162ba0-reading-progress progress{flex:1;accent-color:var(--accent);height:5px}
.s3a4162ba0-reading-progress{width:min(var(--width),calc(100% - 64px));margin-inline:auto}
@media(max-width:760px){.s3a4162ba0-reading-progress{width:calc(100% - 32px)}}