:root{--paper:#f7f7f4;--ink:#171717;--muted:#55554e;--line:#dddcd6;--blue:#2563eb;--blue-soft:#eaf0fd;--white:#fff;--sans:Arial,"Microsoft YaHei","Noto Sans SC",sans-serif;--serif:"Noto Serif SC","SimSun","STSong",serif;--mono:Consolas,"Microsoft YaHei",monospace}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:132px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.72 var(--sans);-webkit-font-smoothing:antialiased}
button,a{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
a:hover{color:var(--blue)}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
.wrap{width:min(1160px,calc(100% - 80px));margin-inline:auto}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{font-family:var(--sans);font-weight:650;letter-spacing:-.04em}
.skip-link{position:fixed;left:10px;top:8px;z-index:100;background:var(--ink);color:#fff;padding:8px 14px;transform:translateY(-160%)}
.skip-link:focus{transform:translateY(0)}
.site-header{height:64px;position:sticky;top:0;z-index:50;background:rgba(247,247,244,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
.site-header .wrap{height:100%;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:baseline;white-space:nowrap}
.brand strong{font-family:var(--sans);font-size:23px;font-weight:800;letter-spacing:-.06em;line-height:1}
.brand-dot{color:var(--blue)}
.main-nav{display:flex;gap:32px;align-items:center;font-size:14px}
.main-nav .active{font-weight:700}
.menu-button{display:none;background:none;border:0;font-size:24px;line-height:1}
.project-nav{height:52px;position:sticky;top:64px;z-index:49;background:rgba(247,247,244,.98);border-bottom:1px solid var(--line);backdrop-filter:blur(14px);overflow-x:auto;scrollbar-width:none}
.project-nav::-webkit-scrollbar{display:none}
.project-nav .wrap{display:flex;align-items:center;height:100%;gap:19px;white-space:nowrap}
.project-title{font-size:14px;font-weight:700;padding-right:26px;border-right:1px solid var(--line)}
.project-nav a:not(.project-title){font-size:12px;color:var(--muted)}
.project-nav a.current{color:var(--blue)}
.project-nav .repo-link{margin-left:auto}
.breadcrumb{display:flex;gap:11px;align-items:center;margin:29px 0 0;font-size:12px;color:var(--muted)}
.breadcrumb a:hover{text-decoration:underline;text-underline-offset:3px}
.index-header{padding:45px 0 34px;border-bottom:1px solid var(--line)}
.section-no{font:11px/1.5 var(--mono);letter-spacing:.18em;color:var(--blue);margin-bottom:12px}
.index-header h1{font-size:45px;line-height:1.18;margin-bottom:18px}
.index-header p{font-size:15px;line-height:1.8;max-width:780px;color:var(--muted);margin-bottom:19px}
.back-link{display:inline-flex;color:var(--blue);font-size:13px;font-weight:700;border-bottom:1px solid var(--blue);padding-bottom:4px}
.index-header-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px}
.index-nav{display:flex;gap:0;border-bottom:1px solid var(--line);margin-bottom:32px}
.index-nav a{display:flex;align-items:baseline;gap:12px;padding:18px 26px 17px 0;margin-right:34px;font-size:13px}
.index-nav b{font:11px/1.5 var(--mono);color:var(--blue)}
.index-nav a:hover span{text-decoration:underline;text-underline-offset:3px}
.metric-catalog{padding-bottom:20px}
.metric-item{position:relative}
.metric-anchor{position:absolute;top:0;width:0;height:0;overflow:hidden}
.metric-aliases{font-size:11px;color:var(--muted);margin:0 0 12px}
.metric-reader dd{white-space:pre-line}
.metric-related{display:flex;flex-wrap:wrap;gap:12px 22px;margin-top:14px;font-size:12px}
.metric-related a{color:#444;text-decoration:underline;text-underline-offset:3px}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.metric-group{margin-bottom:41px}
.metric-group-header{display:flex;align-items:baseline;gap:23px;border-bottom:2px solid #aabce1;padding:0 0 12px}
.metric-group-header h2{font-size:26px;line-height:1.35;margin:0}
.metric-group-header p{font-size:12px;color:var(--muted);margin:0}
.metric-item{display:grid;grid-template-columns:200px minmax(0,1fr);gap:28px;padding:20px 12px 19px 0;border-bottom:1px solid var(--line)}
.metric-item:target{background:#edf3ff;box-shadow:-10px 0 #edf3ff,10px 0 #edf3ff}
.metric-heading{display:flex;align-items:flex-start;flex-direction:column;gap:4px}
.metric-id{font:500 12px/1.5 var(--mono);letter-spacing:.02em;color:#555;white-space:nowrap}
.metric-heading h3{font-size:18px;line-height:1.35;margin:0}
.metric-assessment{font-size:10px;line-height:1.5;color:#66717e;border:1px solid #d5d9dd;padding:2px 7px;margin-top:3px}
.metric-definition{font-size:14px;line-height:1.8;color:#303b45;margin:0 0 12px;font-weight:600}
.metric-reader{margin:0;display:grid;gap:8px}
.metric-reader .metric-detail{grid-template-columns:72px minmax(0,1fr);font-size:13px;line-height:1.7}
.metric-reader .metric-detail dt{color:#536780}
.metric-reader .metric-detail dd{color:#28323b}
.metric-technical{margin-top:13px;border-top:1px solid var(--line);padding-top:8px}
.metric-technical summary{width:max-content;max-width:100%;cursor:pointer;color:var(--blue);font-size:11px;font-weight:700}
.metric-technical summary:hover{text-decoration:underline;text-underline-offset:3px}
.metric-technical .metric-details{margin-top:13px;padding:12px 14px;background:#eef1f5;overflow-wrap:anywhere}
.metric-details{margin:0;display:grid;gap:7px}
.metric-detail{display:grid;grid-template-columns:70px minmax(0,1fr);gap:14px;font-size:12px;line-height:1.75}
.metric-detail dt{color:#637083;font-weight:700}
.metric-detail dd{margin:0;color:#565e66}
.metric-detail:last-child dd{color:#6b6c67}
.loading,.load-error{font-size:13px;color:var(--muted);padding:20px 0}
.load-error{color:#922d27}
.load-error p{margin-bottom:8px}
.retry-button{border:1px solid var(--line);background:#fff;padding:5px 10px;font-size:12px}
.index-footnote{font-size:12px;color:var(--muted);line-height:1.8;border-top:1px solid var(--line);padding-top:17px;margin:10px 0 55px}
.case-footer{border-top:1px solid var(--line);padding:28px 0}
.footer-links{display:flex;align-items:center;justify-content:space-between;gap:25px;color:var(--muted);font-size:12px}
@media(max-width:850px){.wrap{width:calc(100% - 48px)}.main-nav{gap:16px}.metric-item{grid-template-columns:165px minmax(0,1fr);gap:20px}.metric-group-header{display:block}.metric-group-header p{margin-top:6px}}
@media(max-width:600px){html{scroll-padding-top:112px}.wrap{width:calc(100% - 40px)}.site-header{height:56px}.brand strong{font-size:22px}.main-nav{display:none;position:absolute;top:56px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);padding:16px 20px;flex-direction:column;align-items:stretch;gap:13px}.main-nav.open{display:flex}.menu-button{display:block}.project-nav{top:56px;height:48px}.project-nav .wrap{width:max-content;margin:0;padding:0 20px;gap:18px}.project-title{font-size:12px;padding-right:15px}.breadcrumb{margin-top:19px;font-size:11px}.index-header{padding:32px 0 25px}.section-no{font-size:10px}.index-header h1{font-size:32px}.index-header p{font-size:13px}.index-nav{gap:12px;justify-content:space-between;overflow-x:auto;margin-bottom:26px}.index-nav a{display:block;flex:none;padding:13px 0;margin:0;font-size:12px}.index-nav b{display:block;font-size:10px}.metric-group-header h2{font-size:23px}.metric-group-header p{font-size:11px}.metric-item{display:block;padding:17px 0}.metric-heading{display:grid;grid-template-columns:37px minmax(0,1fr) auto;align-items:baseline;gap:8px}.metric-heading h3{font-size:16px}.metric-assessment{font-size:9px;margin:0}.metric-definition{font-size:13px;margin:9px 0 11px}.metric-detail{grid-template-columns:61px minmax(0,1fr);gap:10px;font-size:11px}.metric-item:target{box-shadow:-8px 0 #edf3ff,8px 0 #edf3ff}.index-footnote{font-size:11px;margin-bottom:40px}.footer-links{font-size:11px}}
@media(max-width:390px){.metric-heading{grid-template-columns:36px minmax(0,1fr)}.metric-assessment{grid-column:2;justify-self:start}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}}
@media(max-width:600px){.metric-heading{grid-template-columns:65px minmax(0,1fr)}.metric-content{margin-top:12px}.metric-reader .metric-detail{grid-template-columns:60px minmax(0,1fr);font-size:13px}}