:root{color-scheme:dark;--bg:#080A0D;--surface:#0D1015;--alt:#12161C;--second:#171C23;--hover:#1B2129;--text:#C7CDD5;--muted:#9098A3;--title:#F5F7FA;--blue:#5C7CFA;--bright:#6EA8FF;--ice:#8ED8FF;--line:rgba(255,255,255,.09);--line2:rgba(255,255,255,.16)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:var(--bright);text-underline-offset:4px}a:hover{color:var(--ice)}button{font:inherit;cursor:pointer}a:focus-visible,button:focus-visible{outline:3px solid var(--ice);outline-offset:3px;border-radius:4px}h1,h2,h3{color:var(--title);line-height:1.38;letter-spacing:.01em}h1{font-size:32px;margin:0 0 16px}h2{font-size:24px;margin:0 0 14px}h3{font-size:19px;margin:0 0 10px}p{margin:0 0 16px}ul,ol{padding-left:1.5em}li{margin-bottom:7px}figure{margin:0}figcaption{font-size:14px;color:var(--muted);padding:9px 4px 0;line-height:1.7}.container{width:min(1200px,calc(100% - 48px));margin-inline:auto}.read-width{max-width:800px}.site-main{min-height:65vh}.site-head{position:sticky;top:0;z-index:70;background:rgba(8,10,13,.96);border-bottom:1px solid var(--line)}.head-inner{height:68px;width:min(1200px,calc(100% - 48px));margin:auto;display:flex;align-items:center;gap:18px;min-width:0}.brand{display:flex;align-items:center;gap:7px;text-decoration:none;min-width:0;color:var(--title);flex-shrink:0}.brand .media-natural{background:none;padding:0;max-width:100px;min-width:0}.brand img{max-height:34px;max-width:90px}.brand .media-unavailable{display:none}.brand-type{display:flex;flex-direction:column;line-height:1.25;white-space:nowrap}.brand-type strong{font-size:18px;color:var(--title)}.brand-type small{font-size:9px;color:var(--muted);letter-spacing:.05em}.primary-nav{display:flex;align-items:center;gap:16px;margin-left:auto;white-space:nowrap;min-width:0}.primary-nav a{text-decoration:none;font-size:14px;color:var(--text)}.primary-nav a.active,.primary-nav a:hover{color:var(--bright)}.menu-trigger,.menu-close{border:1px solid var(--line2);background:var(--alt);color:var(--title);border-radius:8px;padding:7px 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85px);overflow:auto}.site-directory[hidden],.drawer-overlay[hidden],.back-top[hidden]{display:none!important}.directory-top{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}.directory-title{font-weight:bold;color:var(--title)}.directory-inner{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.directory-group{min-width:0}.directory-group h2{font-size:16px;margin:0 0 8px}.directory-group ul{list-style:none;padding:0;margin:0}.directory-group li{margin:0 0 5px}.directory-group a{font-size:14px;color:var(--text);text-decoration:none}.directory-group a:hover{color:var(--bright);text-decoration:underline}.directory-end{border-top:1px solid var(--line);padding-top:10px;margin:8px 0 0}.drawer-overlay{display:none}.breadcrumbs{display:flex;gap:10px;align-items:center;padding-top:24px;color:var(--muted);font-size:13px}.breadcrumbs a{color:var(--muted)}.page-intro{padding:30px 0 24px;border-bottom:1px solid var(--line)}.page-intro>p:last-child{max-width:780px;color:var(--text);font-size:17px}.eyebrow{font-size:13px;letter-spacing:.1em;color:var(--bright);font-weight:700;margin:0 0 10px}.channel-links{display:flex;flex-wrap:wrap;gap:8px;padding:16px 0 4px}.channel-links a{font-size:14px;padding:5px 12px;background:var(--alt);border:1px solid var(--line);border-radius:8px;color:var(--text);text-decoration:none}.channel-links a.active{border-color:var(--blue);color:var(--bright)}.content-section{padding:34px 0}.content-section+.content-section{border-top:1px solid var(--line)}.section-label{color:var(--bright);font-weight:bold;font-size:13px;letter-spacing:.08em;margin-bottom:10px}.muted{color:var(--muted)}.lead{font-size:18px;line-height:1.82;max-width:860px}.panel{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;min-width:0}.panel-alt{background:var(--alt)}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.split{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:28px}.reading-layout{display:grid;grid-template-columns:minmax(0,800px) minmax(0,260px);gap:40px}.reading-layout>*{min-width:0}.stack>*+*{margin-top:18px}.line-list{border-top:1px solid var(--line);list-style:none;margin:18px 0 0;padding:0}.line-list li{padding:17px 0;border-bottom:1px solid var(--line)}.line-list a{text-decoration:none;font-weight:700}.line-list a:hover{text-decoration:underline}.numbered{counter-reset:cnt;list-style:none;padding:0}.numbered li{counter-increment:cnt;position:relative;padding:0 0 20px 44px;border-left:1px solid var(--line);margin-left:10px}.numbered 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@media(max-width:1050px){.primary-nav{display:none}.menu-trigger{margin-left:auto}.brand-type small{display:none}}@media(max-width:767px){body{font-size:15px}.container,.head-inner{width:calc(100% - 32px)}.head-inner{height:64px;gap:9px}.brand .media-natural{max-width:96px}.brand-type strong{font-size:15px}.brand-type small{display:none}.entry-button{font-size:13px;padding:0 11px;min-height:44px}.menu-trigger{padding:7px 9px;font-size:14px}.site-directory{top:auto;bottom:0;left:0;right:0;width:100%;max-height:85vh;max-height:85dvh;border-radius:18px 18px 0 0;padding:16px 16px max(16px,env(safe-area-inset-bottom));z-index:110}.directory-inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.drawer-overlay{display:block;position:fixed;inset:0;background:rgba(0,0,0,.65);z-index:100}.page-intro{padding:20px 0}.page-intro h1{font-size:27px}.page-intro>p:last-child{font-size:15px}.breadcrumbs{padding-top:14px}.channel-links{gap:6px}.channel-links a{font-size:13px}.home-mast{grid-template-columns:1fr;padding:27px 0 20px;gap:8px}.home-mast h1{font-size:28px}.home-prompts{border:0;border-top:1px solid var(--line);padding:8px 0 0;display:flex;gap:14px;flex-wrap:wrap}.home-prompts span{padding:0;font-size:13px}.content-section{padding:25px 0}.content-section h2{font-size:21px}h3{font-size:18px}.two-col,.three-col,.split,.reading-layout,.question-grid{grid-template-columns:1fr}.image-catalog{grid-template-columns:repeat(2,minmax(0,1fr))}.image-catalog .media-frame{max-height:165px}.media-natural>img{max-height:var(--image-max-height,210px)}.media-poster img{max-height:170px}.media-mobile img{max-height:280px}.media-gif img{max-height:150px}.panel{padding:16px}.index-entry{grid-template-columns:1fr;gap:4px}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.footer-brand{grid-column:1/-1}.footer-bottom{flex-wrap:wrap}.feature-read{padding:18px}.related ul{display:block}.related li{margin:7px 0}}@media(max-width:360px){.brand-type small{display:none}.brand-type strong{font-size:14px}.head-inner{gap:6px}.entry-button{padding:0 8px}.menu-trigger{padding:7px}.directory-inner{grid-template-columns:1fr 1fr;gap:12px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.media-gif img{visibility:hidden}.media-gif:after{content:'系统已启用减少动态效果：动态图隐藏';font-size:12px;color:var(--muted);position:absolute}.media-gif{position:relative}}