:root{--ink:#242638;--muted:#777988;--line:#e7e7ed;--purple:#5554ce;--orange:#e89450;--bg:#f7f8fb;--green:#259377;--font:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.65 var(--font)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.55;cursor:wait}button,a,input,select,summary{outline-offset:4px}button:focus-visible,a:focus-visible{outline:2px solid var(--purple)}.rail{width:222px;position:fixed;inset:0 auto 0 0;background:white;border-right:1px solid var(--line);padding:31px 22px;display:flex;flex-direction:column;z-index:3}.brand{display:flex;align-items:center;gap:12px;font-size:23px;font-weight:750;line-height:1.2}.logo{width:40px;height:43px;display:grid;place-items:center;border-radius:12px;background:var(--purple);color:white;font-size:27px;font-weight:450}.brand-sub{display:block;font-size:12px;font-weight:500;color:var(--muted);margin-top:4px;letter-spacing:2px}.rail-label{font-size:9px;letter-spacing:1.7px;color:#9697a5;margin:45px 10px 14px}nav{display:grid;gap:7px}nav button{border:0;background:none;text-align:left;padding:11px 12px;border-radius:8px;color:#777887;display:flex;gap:13px;align-items:center}nav button.active{background:#efeffc;color:var(--purple);font-weight:650}nav button>span:first-child{font-size:20px;width:19px}.nav-count{margin-left:auto;font-size:10px;color:#9697a5}.rail-guide{margin-top:56px;padding:18px 12px;border-top:1px solid var(--line)}.rail-guide 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@media(min-width:1500px){main{padding:42px 55px}.hero-chart .chart{max-height:280px}}@media(max-width:1150px){.rail{width:190px;padding:28px 16px}.workspace{margin-left:190px}main{padding:27px 25px}.topbar{padding:14px 25px}.overview-grid{grid-template-columns:1.7fr 1fr}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.status-values{gap:15px}.status-values b{font-size:25px}.explorer{grid-template-columns:250px minmax(0,1fr)}h1{font-size:29px}.chart-foot{flex-wrap:wrap}.sync{gap:7px}.flow button{padding:15px}}@media(max-width:850px){.rail{position:static;width:100%;padding:15px 22px;flex-direction:row;align-items:center;justify-content:space-between;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:20px}.logo{width:32px;height:36px;font-size:23px}.brand-sub{font-size:9px}.rail-label,.rail-guide,.rail-foot,.source-link,.nav-count{display:none}.rail nav{display:flex;gap:3px}.rail nav button{padding:8px;font-size:12px;gap:6px}.workspace{margin-left:0}.topbar{min-height:58px;font-size:11px}.overview-grid{grid-template-columns:1fr}.reading-note{display:none}.explorer{grid-template-columns:230px minmax(0,1fr)}.explain-grid{grid-template-columns:1fr}.detail h2{font-size:20px}.section-head{flex-wrap:wrap}.outline-tag{display:none}.sync{flex-wrap:wrap;justify-content:flex-end}#connection{max-width:170px}.status-values b{font-size:23px}}
@media(max-width:600px){main{padding:24px 16px}.topbar{padding:10px 16px}.topbar>div:first-child{display:none}.sync{width:100%;justify-content:space-between}h1{font-size:27px}.status-grid,.metric-grid,.bottom-grid,.lesson-grid{grid-template-columns:1fr}.panel{padding:19px}.status-values b{font-size:28px}.flow{gap:6px;flex-wrap:wrap}.flow button{flex:1 0 42%;padding:14px}.flow i{display:none}.explorer{grid-template-columns:1fr}.metric-browser{position:static}#metric-list{max-height:230px}.rail{padding:13px 16px}.rail nav button>span:first-child{display:none}.rail nav button{font-size:11px}.brand{gap:8px}.chart-foot{font-size:9px}.sliders{gap:20px}.experiment-result{gap:20px}.experiment-result b{font-size:25px}.metric-card p{min-height:0}.page-heading{margin-bottom:20px}.tooltip{max-width:210px}}
/* Readable controls and stable mobile master/detail navigation. */
.mobile-back{display:none}.chart-reader{display:flex;align-items:center;gap:10px;margin-top:12px}.chart-reader button{min-width:44px;min-height:44px}.chart-reader output{flex:1;text-align:center;min-width:0;font-variant-numeric:tabular-nums}.chart-reader output b,.chart-reader output span{display:block}.chart-reader output span{font-size:13px;color:#555866}.chart-hint{font-size:12px;text-align:center;color:#646677}.chart text{fill:#646677}.interactive-chart svg{touch-action:pan-y}.interactive-chart .chart{max-height:none}.table-wrap{overscroll-behavior:auto}.eyebrow,.footnote,.subtle,.notice time,.metric-card code,.detail code,.official{color:#646677}.mobile-back{margin-bottom:20px}button:disabled{cursor:default}summary{padding:10px 0;min-height:44px}input,button,select{-webkit-tap-highlight-color:transparent}
@media(max-width:700px){
 body{font-size:16px;overflow-wrap:break-word}.workspace{margin-left:0}.rail{position:static;width:100%;padding:14px 16px}.brand-sub{font-size:11px}.rail nav{position:fixed;inset:auto 0 0;background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;padding:7px 10px calc(7px + env(safe-area-inset-bottom));z-index:20;box-shadow:0 -4px 20px #25263808}.rail nav button{min-height:52px;justify-content:center;flex-direction:column;gap:0;font-size:12px;padding:4px}.rail nav button>span:first-child{display:block;width:auto;font-size:20px;line-height:1.2}.rail .nav-count{display:none}main{padding:24px 14px calc(100px + env(safe-area-inset-bottom))}.topbar{padding:10px 14px}.topbar>div:first-child{display:none}.sync{display:grid;grid-template-columns:1fr auto auto;width:100%;gap:8px;font-size:12px}#connection{max-width:none;line-height:1.5}.quiet{min-height:44px;padding:8px 10px}.panel{padding:18px}.page-heading p{font-size:14px}h1{font-size:27px}.eyebrow{font-size:11px;letter-spacing:1px}.status-grid,.metric-grid,.bottom-grid,.lesson-grid{grid-template-columns:1fr}.status-title{font-size:14px}.pill{font-size:12px}.status-values{gap:10px;flex-wrap:wrap}.status-values>div{flex:1 1 80px}.status-values b{font-size:25px}.status-values small{font-size:12px;display:block}.status-foot{font-size:12px}.overview-grid{grid-template-columns:1fr}.reading-note{display:block;padding:20px}.reading-note p,.reading-note b{font-size:14px}.note-line{margin:14px 0}.text-button{font-size:14px;min-height:44px}.chart-foot{font-size:12px;line-height:1.7}.chart-reader output span{font-size:12px}.chart-reader{gap:5px}.chart-hint{font-size:12px}.chart text{font-size:12px}.flow{flex-wrap:wrap}.flow button{flex:1 1 42%;min-height:100px;padding:14px}.flow i{display:none}.flow b{font-size:15px}.flow small,.flow button span{font-size:12px}.filters{gap:5px}.filters button{min-height:44px;font-size:13px;padding:8px 12px}.subtle,.footnote{font-size:12px}.metric-card h3{font-size:17px}.metric-card p{font-size:14px;min-height:0}.metric-card code{font-size:12px}.group-label,.metric-card .card-action,.metric-values small{font-size:12px}.metric-card .metric-values{font-size:23px}.explorer{display:block}.metric-browser{position:static}.metric-browser label{font-size:16px}input[type=search],select{font-size:16px;min-height:48px}#metric-list{max-height:none}.metric-item{padding:14px 10px;min-height:64px}.metric-item b{font-size:15px}.metric-item code{font-size:12px;color:#646677}#metrics:not(.show-detail) #detail{display:none}#metrics.show-detail .metric-browser{display:none}.mobile-back{display:block}.detail>.eyebrow{display:block}.detail h2{font-size:23px}.detail code{font-size:12px}.definition-badge{font-size:12px}.explain-grid{grid-template-columns:1fr}.explain-block h3{font-size:15px}.explain-block p,.example{font-size:15px}.official{font-size:13px;overflow-wrap:anywhere}.values-table,.bench-table{font-size:12px}.values-table th,.bench-table th{font-size:12px}.values-table th,.values-table td,.bench-table th,.bench-table td{padding:10px 5px;overflow-wrap:anywhere}.detail>.table-wrap{max-height:none}.detail>.table-wrap table thead{display:none}.detail>.table-wrap table tr{display:grid;grid-template-columns:1fr 1fr;padding:12px 0;border-bottom:1px solid var(--line)}.detail>.table-wrap table td{border:0;padding:4px}.detail>.table-wrap table td:nth-child(4){grid-column:1/-1;color:#646677}.notice p,.notice details{font-size:14px}.notice time{font-size:12px}.notice summary{display:list-item}.lesson{padding:20px}.lesson h2{font-size:20px}.lesson p{font-size:15px}.lesson .takeaway{font-size:14px}.experiment p{font-size:15px}.sliders,.experiment-result{flex-direction:column;gap:20px}.sliders label{font-size:16px}.sliders input{min-height:44px;margin:6px 0}.experiment-result span{font-size:14px}pre{font-size:12px}.mini-metric{font-size:14px}footer{font-size:12px}.tooltip{display:none!important}.error{font-size:14px}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:700px){.detail>.table-wrap td[data-label]::before{content:attr(data-label);display:block;font-size:11px;color:#646677}.chart text{font-size:14px}}
.back-live{display:block;background:#fff;color:#5554ce;padding:10px 16px;text-align:center;font-size:14px;border-bottom:1px solid #e7e7ed}