:root{--ink:#192c48;--muted:#66768c;--line:#e2e8f1;--tx:#495ddd;--rx:#139c9a;--paper:#fff;--bg:#f3f6fb;font-family:"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,select{font:inherit}button,select,a{-webkit-tap-highlight-color:transparent}button,select{cursor:pointer}button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #8799f7;outline-offset:3px}button{transition:background .15s,color .15s}button:hover{background:#e9edf9}button[aria-pressed=true]{background:var(--paper);color:var(--ink);box-shadow:0 1px 4px #182c4814}.topbar{height:76px;background:var(--paper);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:28px;padding:0 max(28px,calc((100vw - 1200px)/2))}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none;font-size:19px;font-weight:700;white-space:nowrap}.brand svg{width:31px;height:31px;stroke:var(--tx);stroke-width:2.5;fill:none;stroke-linecap:round;stroke-linejoin:round}.top-meta{font-size:14px;color:var(--muted);padding-left:27px;border-left:1px solid var(--line);font-variant-numeric:tabular-nums}.connection{margin-left:auto;white-space:nowrap;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px}.connection:before{content:"";height:7px;width:7px;background:#a6adba;border-radius:50%}.connection.live{color:#237960}.connection.live:before{background:#27a77d}.connection.offline{color:#b44943}.connection.offline:before{background:#d26158}main{max-width:1200px;margin:auto;padding:38px 0 22px}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:25px;margin-bottom:30px}h1{font-size:31px;letter-spacing:-1px;margin:0 0 9px;font-weight:650}.page-heading p{color:var(--muted);font-size:14px;margin:0}.heading-aside{display:grid;grid-template-columns:auto auto;column-gap:17px;align-items:center;font-size:12px;color:var(--muted)}.heading-aside strong{grid-row:span 2;color:var(--ink);font-size:32px;font-weight:600;font-variant-numeric:tabular-nums}.heading-aside small{font-size:14px;font-weight:400}.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;gap:16px}.segments{display:flex;padding:4px;border:1px solid #dfe5f0;border-radius:9px;background:#e9edf5;gap:3px}.segments button{background:transparent;border:0;border-radius:6px;padding:10px 16px;color:var(--muted);font-size:13px}.segments span{margin-left:7px;font-size:11px;opacity:.7}.sampling{font-size:12px;color:var(--muted)}.bandwidth{display:grid;grid-template-columns:1fr 1fr;background:var(--paper);border:1px solid var(--line);border-radius:14px;overflow:hidden}.speed{padding:26px 30px 23px}.speed+ .speed{border-left:1px solid var(--line)}.speed-title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600}.speed-title small{margin-left:auto;color:var(--muted);font-weight:400;font-size:12px}.arrow{width:25px;height:25px;border-radius:7px;background:#eef0ff;color:var(--tx);display:inline-flex;align-items:center;justify-content:center;font-size:20px}.incoming .arrow{color:var(--rx);background:#e8f7f4}.speed-value{display:flex;align-items:baseline;gap:12px;margin:15px 0 14px}.speed-value strong{font-size:63px;font-weight:550;letter-spacing:-3px;line-height:1.1;font-variant-numeric:tabular-nums;transition:color .2s}.outgoing .speed-value strong{color:var(--tx)}.incoming .speed-value strong{color:var(--rx)}.speed-value>span{font-size:16px;color:var(--muted)}.speed-detail{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.meter{background:#eef1f7;height:5px;border-radius:4px;margin-top:13px;overflow:hidden}.meter i{display:block;background:var(--tx);height:100%;width:0;transition:width .5s}.incoming .meter i{background:var(--rx)}.chart-panel{background:var(--paper);border:1px solid var(--line);border-radius:14px;margin-top:18px;padding:25px 28px 0}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:14px}.section-heading>span{font-size:12px;color:var(--muted)}h2{margin:0;font-size:16px;font-weight:650}.legend{display:flex;align-items:center;gap:18px;margin-top:10px;font-size:12px;color:var(--muted)}.legend .tx-dot:before,.legend .rx-dot:before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:6px;background:var(--tx)}.legend .rx-dot:before{background:var(--rx)}#range-note{color:#8b97a7}.chart-controls{display:flex;align-items:center;gap:10px}.range-buttons{display:flex;background:#f0f3f8;padding:3px;border-radius:7px}.range-buttons button{border:0;background:transparent;border-radius:5px;font-size:12px;padding:7px 12px;color:var(--muted)}select,.pause{border:1px solid var(--line);background:#fff;color:var(--muted);padding:8px 10px;font-size:12px;border-radius:6px}.chart-wrap{position:relative;margin-top:20px}#chart{display:block;width:100%;height:260px;overflow:visible}#chart text{font-size:11px;fill:#7e8ca0;font-family:inherit}#chart .grid{stroke:#edf0f6;stroke-width:1}#chart .reference{stroke:#d1a759;stroke-dasharray:5 5;stroke-width:1}#chart .tx-line{stroke:var(--tx);fill:none;stroke-width:2;vector-effect:non-scaling-stroke}#chart .rx-line{stroke:var(--rx);fill:none;stroke-width:2;vector-effect:non-scaling-stroke}.chart-footer{border-top:1px solid #eef1f6;margin-top:12px;padding:13px 0;display:flex;gap:15px;justify-content:space-between;font-size:11px;color:var(--muted)}.tooltip{position:absolute;pointer-events:none;background:#1c304bef;color:#fff;padding:11px 14px;font-size:12px;line-height:1.7;box-shadow:0 5px 20px #182c4824;border-radius:8px;white-space:pre-line;z-index:2;max-width:230px}.empty-chart{position:absolute;inset:0;display:flex;justify-content:center;align-items:center;color:var(--muted);font-size:13px}.empty-chart[hidden]{display:none}.lower-grid{display:grid;grid-template-columns:1.13fr 1fr;gap:18px;margin-top:18px}.traffic-section,.system-section,.peers-section{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:24px 28px}.traffic-numbers{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin-top:24px}.traffic-numbers>div{display:flex;flex-direction:column;gap:9px}.traffic-numbers span{color:var(--muted);font-size:12px}.traffic-numbers strong{font-size:27px;font-weight:550;font-variant-numeric:tabular-nums}.peak-row{margin-top:23px;display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:11px}.peak-row b{font-weight:500;color:var(--ink)}.subnote{font-size:11px;color:#7d8b9d;line-height:1.8;margin:16px 0 0}.resource{margin-top:20px}.resource>div:first-child{display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}.resource strong{font-weight:500;color:var(--ink);font-variant-numeric:tabular-nums}.resource-meter{height:4px;background:#edf1f7;margin-top:9px;border-radius:3px;overflow:hidden}.resource-meter i{height:100%;width:0;display:block;background:#7083c6;transition:width .5s}.disk .resource-meter i{background:#93a2b8}.peers-section{margin-top:18px}.wg-heading{display:flex;align-items:center;gap:12px}.badge{font-size:11px;padding:4px 8px;border-radius:5px;background:#edf6f3;color:#287e63}.badge.down{color:#ad4941;background:#fcf0ef}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;margin-top:17px;white-space:nowrap;text-align:left;font-size:12px}th{font-size:11px;color:#7f8c9e;font-weight:400;padding:11px 12px;background:#f7f9fc}td{padding:17px 12px;border-bottom:1px solid #edf0f5;font-variant-numeric:tabular-nums}.handshake{display:flex;align-items:center;gap:7px}.handshake:before{content:"";width:6px;height:6px;border-radius:50%;background:#a0aabd}.handshake.recent:before{background:#2ca680}footer{font-size:11px;color:#7b899b;line-height:1.8;padding:19px 2px;display:flex;justify-content:space-between;gap:20px}.error{padding:12px 16px;border:1px solid #edc3bd;background:#fff0ed;color:#9b4038;font-size:13px;border-radius:8px;margin-bottom:18px}body.stale .speed-value strong{color:#8e9aad}.pause[aria-pressed=true]{background:#eef0ff;color:var(--tx)}@media(min-width:1600px){main{padding-top:48px}}@media(max-width:1255px){main{margin:0 28px}.topbar{padding:0 28px}}@media(max-width:800px){main{margin:0 18px;padding-top:25px}.topbar{padding:0 20px;height:65px;gap:15px}.top-meta{padding-left:15px;font-size:12px}.brand{font-size:16px}.page-heading{align-items:flex-start}h1{font-size:24px}.heading-aside{display:flex;flex-direction:column;align-items:flex-end;gap:4px}.heading-aside strong{font-size:25px}.heading-aside>span:last-child{display:none}.speed{padding:22px}.speed-title small{display:none}.speed-value strong{font-size:50px}.chart-panel{padding:22px 18px 0}.chart-panel>.section-heading{align-items:flex-start;flex-wrap:wrap}.chart-controls{width:100%;justify-content:space-between;margin-top:5px}.chart-footer>span:last-child{display:none}.lower-grid{grid-template-columns:1fr}.traffic-section,.system-section,.peers-section{padding:22px}footer{flex-direction:column;gap:5px}.sampling{font-size:11px}.segments button{padding:9px 10px}.segments span{display:none}#chart{height:230px}}@media(max-width:440px){.top-meta{display:none}.page-heading{gap:8px}h1{font-size:20px;letter-spacing:-.5px}.page-heading p{font-size:12px;max-width:220px;line-height:1.7}.heading-aside{font-size:10px}.heading-aside strong{font-size:21px}.speed{padding:19px 15px}.speed-title{font-size:12px}.speed-value{gap:7px}.speed-value strong{font-size:42px}.speed-value>span{font-size:12px}.speed-detail{font-size:10px;flex-direction:column;gap:6px}.toolbar{gap:8px}.segments button{font-size:12px}.sampling{font-size:10px}.chart-controls{gap:6px}.range-buttons button{padding:7px 9px}select,.pause{padding:7px;font-size:11px}.traffic-numbers strong{font-size:25px}.legend{gap:13px}.chart-footer{font-size:10px}.connection{font-size:12px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}
.segments button[aria-pressed=true],.range-buttons button[aria-pressed=true]{background:#fff;color:var(--ink);box-shadow:0 1px 4px #182c4814}
/* Keep explanations on demand; data and controls carry the page. */
.page-heading{margin-bottom:24px}h1{margin:0}.heading-aside{display:flex;align-items:center;gap:16px}.heading-aside>span{display:flex;align-items:center;gap:5px}.heading-aside strong{font-size:30px}.title-row{display:flex;align-items:center;gap:8px}.info-wrap{display:inline-flex;position:relative;align-items:center;vertical-align:middle}.info{border:0;background:transparent;color:#8d9aae;width:22px;height:22px;min-width:22px;padding:0;border-radius:50%;font:600 12px Georgia,serif;display:inline-flex;align-items:center;justify-content:center}.info:before{content:"";border:1px solid #bbc5d3;border-radius:50%;position:absolute;width:14px;height:14px}.info:hover,.info:focus-visible{color:#495ddd;background:#eef0ff}.info-tip{position:absolute;top:calc(100% + 9px);left:0;width:270px;max-width:calc(100vw - 48px);padding:12px 14px;border:1px solid #dbe3ee;background:#fff;color:#52647c;font:12px/1.8 "Segoe UI","Microsoft YaHei",sans-serif;border-radius:9px;box-shadow:0 8px 30px #182c4821;z-index:10;white-space:normal;text-align:left;font-weight:400}.heading-aside .info-tip{left:auto;right:0}.info-tip[hidden]{display:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.chart-panel{padding-bottom:17px}.speed-title{gap:8px}.speed-detail{color:#7c8a9d}.traffic-section{display:flex;flex-direction:column}.peak-row{margin-top:auto;padding-top:23px}main{padding-bottom:32px}.sampling{font-variant-numeric:tabular-nums}.range-buttons button,.pause{white-space:nowrap}.wg-heading{gap:10px}@media(max-width:800px){.heading-aside{align-items:flex-end;flex-direction:column;gap:4px}.heading-aside strong{font-size:25px}.page-heading{align-items:center;margin-bottom:22px}.traffic-section .peak-row{margin-top:5px;padding-top:14px}.info-tip{width:240px}}@media(max-width:440px){.page-heading h1{font-size:24px}.heading-aside strong{font-size:24px}.heading-aside>span{font-size:10px}.chart-controls{display:grid;grid-template-columns:1fr auto;gap:9px}.range-buttons{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr)}.range-buttons button{padding:8px 10px}.chart-controls select{width:max-content;min-width:110px}.chart-controls .pause{padding:7px 12px}.speed-detail{flex-direction:row;gap:4px}.speed-value strong{font-size:41px}.sampling{font-size:11px}.wg-heading .info-tip{left:auto;right:-70px}.info{width:26px;height:26px;min-width:26px}}
.logout{border:1px solid var(--line);background:#fff;color:var(--muted);padding:7px 12px;border-radius:6px;font-size:12px;white-space:nowrap}.logout:disabled{opacity:.5}.login-page{min-height:100vh;display:grid;place-items:center;background:#f3f6fb}.login-shell{width:100%;max-width:410px;padding:32px 18px;margin:0}.login-brand{display:flex;align-items:center;justify-content:center;gap:12px;font-size:21px;font-weight:650;margin-bottom:30px}.login-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px;box-shadow:0 15px 45px #203d7010}.login-card h1{font-size:26px;margin-bottom:29px;letter-spacing:0}.login-card form{display:flex;flex-direction:column}.login-card label{font-size:13px;color:#52647c;margin-bottom:9px}.login-card input{height:45px;width:100%;border:1px solid #dbe2ee;border-radius:7px;background:#fcfdff;font:15px "Segoe UI","Microsoft YaHei",sans-serif;padding:0 12px;color:var(--ink);margin-bottom:22px;outline:0}.login-card input:focus{border-color:#7184e4;box-shadow:0 0 0 3px #495ddd13}.login-card button[type=submit]{width:100%;height:45px;border:0;border-radius:7px;background:var(--tx);color:white;font-size:14px;font-weight:600;margin-top:5px}.login-card button[type=submit]:hover{background:#3d50c5}.login-card button[type=submit]:disabled{opacity:.6;cursor:wait}#login-error{margin:0 0 15px;padding:10px 12px;background:#fff1ee;color:#a64e43;border-radius:6px;font-size:12px;line-height:1.7}@media(max-width:440px){.login-shell{max-width:390px;padding:25px 22px}.login-card{padding:28px}.login-brand{margin-bottom:25px}.topbar{gap:12px}.logout{padding:6px 9px;font-size:11px}}