@charset "UTF-8";
:root{--paper:#f5f4ef;--card:#fffefa;--ink:#20231f;--muted:#777b73;--line:#e1e2da;--blue:#2449eb;--orange:#ad5725;--mono:"Bahnschrift","DIN Alternate","Consolas",monospace;--text:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled,select:disabled{cursor:wait;opacity:.5}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #2449eb77;outline-offset:4px}[hidden]{display:none!important}a{color:inherit;text-decoration:none}.shell{width:min(1180px,calc(100% - 80px));margin:0 auto}.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}.masthead{height:112px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:13px;font-size:18px;font-weight:700;letter-spacing:.5px}.brand-mark{display:grid;place-items:center;letter-spacing:-3px;padding-right:3px;width:43px;height:43px;background:var(--ink);color:var(--card);border-radius:11px;font:26px var(--mono)}.brand-separator{color:#9d9f97;margin:0 12px;font-weight:400}.brand small{display:block;font:9px var(--mono);letter-spacing:2.5px;color:var(--muted);margin-top:7px}.connection{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--muted)}.connection i{height:7px;width:7px;border-radius:100%;background:#a1a49d}.connection.online i{background:#5b8552;box-shadow:0 0 0 4px #5b855211}.connection.offline i{background:#ba4c3e}.intro{display:flex;justify-content:space-between;gap:20px;align-items:flex-end;padding:48px 0 37px}.eyebrow{display:flex;align-items:center;gap:9px;font-size:11px;color:var(--muted);letter-spacing:2px;margin:0 0 18px}.eyebrow span{height:5px;width:16px;background:var(--blue)}h1{font-size:clamp(36px,4.1vw,52px);letter-spacing:-2px;font-weight:800;line-height:1.2;margin:0}.blue{color:var(--blue)}.mobile-break{display:none}.intro-copy{color:var(--muted);margin:18px 0 0;line-height:1.8}.intro-actions{display:flex;flex-direction:column;align-items:center;gap:12px;padding-bottom:3px}.intro-actions>span{font-size:10px;color:var(--muted)}.button{border:0;border-radius:7px;display:flex;align-items:center;justify-content:space-between;gap:30px;min-height:46px;padding:0 20px;font-size:13px;font-weight:600;transition:background .18s,transform .18s}.button:hover:not(:disabled){transform:translateY(-1px)}.button span{font-size:20px;font-weight:400}.button-dark{background:var(--ink);color:white;min-width:174px}.button-dark:hover{background:#383e35}.button-stop{background:#9f392c;color:white;min-width:174px}.route-strip{display:flex;align-items:center;gap:26px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0}.route-end{display:flex;gap:8px;flex-direction:column;min-width:125px}.tiny-label{font-size:10px;color:var(--muted);letter-spacing:.4px}.route-end strong{font-size:14px;font-weight:600}.route-end strong.mono{font-size:17px}.route-line{display:flex;align-items:center;gap:12px;flex:1;max-width:250px}.route-line:before,.route-line:after{content:"";height:1px;background:#c9cdc1;flex:1}.route-line i{width:4px;height:4px;border-radius:50%;background:#a5aa9d;flex:none}.route-line span{font-size:10px;color:var(--muted);white-space:nowrap}.latency{margin-left:auto;border-left:1px solid var(--line);padding-left:28px;display:flex;align-items:center;gap:25px}.latency strong{font:26px var(--mono);white-space:nowrap}.latency small{font:11px var(--text);color:var(--muted)}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:32px 0 15px;gap:12px}h2{margin:0;font-size:13px;font-weight:600;letter-spacing:.5px}.unit-control{display:flex;border:1px solid var(--line);border-radius:5px;padding:3px;gap:3px}.unit-control button{border:0;background:transparent;color:var(--muted);border-radius:3px;padding:5px 11px;font:11px var(--mono)}.unit-control button[aria-pressed=true]{color:var(--ink);background:var(--card);box-shadow:0 1px 4px #20231f12}.test-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.test-card{min-width:0;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px 24px 18px;--accent:var(--blue)}.upload{--accent:var(--orange)}.card-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.card-title{display:flex;gap:12px;align-items:center}.direction-icon{background:#eef0ff;color:var(--accent);width:40px;height:40px;border-radius:9px;font:26px var(--mono);display:grid;place-items:center}.upload .direction-icon{background:#faf0e7}h3{font-size:15px;margin:0 0 5px}.card-title p{font-size:10px;color:var(--muted);margin:0}.state{font-size:10px;color:var(--muted);background:#efefe9;border:1px solid #e7e8df;border-radius:20px;padding:5px 9px;white-space:nowrap}.test-card.running .state{color:var(--accent);background:transparent;border-color:var(--accent)}.test-card.done .state{color:#56764d;background:#f0f5e9;border-color:#dfe8d8}.test-card.error .state{color:#ac372d}.speed{display:flex;align-items:baseline;gap:12px;margin:29px 0 8px;height:80px}.speed>span:first-child{font:76px/.95 var(--mono);letter-spacing:-3px;font-weight:600;font-variant-numeric:tabular-nums}.speed-unit{font:15px var(--mono);color:var(--muted)}.chart{margin-bottom:19px}.chart svg{display:block;width:100%;height:103px;overflow:visible}.chart-grid{stroke:#e8e9e1;stroke-width:1;fill:none;stroke-dasharray:3 5}.chart-line{stroke:var(--accent);stroke-width:2.5;fill:none;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}.chart-labels{display:flex;justify-content:space-between;font-size:9px;color:#96998f;margin-top:3px}.stats{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:8px;border-top:1px solid var(--line);padding-top:18px}.stats div{min-width:0}.stats span{display:block;font-size:10px;color:var(--muted);margin-bottom:8px}.stats strong{display:block;font:13px var(--mono);white-space:nowrap;font-weight:500}.transfer-progress{display:flex;align-items:center;gap:12px;margin:18px 0 19px}progress{appearance:none;-webkit-appearance:none;display:block;width:100%;height:4px;flex:1;border:none;border-radius:4px;overflow:hidden;background:#e9eae3}progress::-webkit-progress-bar{background:#e9eae3}progress::-webkit-progress-value{background:var(--accent);border-radius:4px;transition:width .15s}progress::-moz-progress-bar{background:var(--accent)}.transfer-progress>span{font:10px var(--mono);color:var(--muted);min-width:30px;text-align:right}.card-options{display:flex;align-items:center;gap:10px;min-height:31px}.card-options label{font-size:10px;color:var(--muted);white-space:nowrap}.card-options select{background:transparent;border:1px solid var(--line);border-radius:4px;font-size:10px;color:var(--ink);padding:7px 20px 7px 7px;max-width:160px;min-width:0}.card-options a,.text-button{font-size:10px;border:0;background:none;color:var(--muted);padding:4px 0;text-decoration:underline;text-underline-offset:4px}.card-options a,.card-options .text-button{margin-left:auto;white-space:nowrap}.text-button:hover,.card-options a:hover{color:var(--ink)}.card-options select:disabled{opacity:.5}.selected-file{margin-top:8px;padding:8px 10px;background:#faf0e7;border-radius:4px;display:flex;align-items:center;gap:6px;font-size:10px;color:#88512d}.selected-file span{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.selected-file button{border:0;background:none;color:inherit;font-size:18px;padding:0 3px}.start-button{margin-top:16px;width:100%;min-height:44px}.button-download{background:var(--blue);color:#fff}.button-download:hover{background:#1e3bd2}.button-upload{background:#f2e9df;color:#8e4a21}.button-upload:hover{background:#ebdfd1}.card-note{color:#96998f;font-size:9px;margin:12px 0 0;line-height:1.6}.message{min-height:24px;color:var(--muted);font-size:11px;margin:15px 0 0;line-height:1.7}.message.error{color:#ac372d}.history-section .section-heading{margin-top:25px}.history-count{display:inline-block;color:#96998f;font:11px var(--mono);margin-left:7px}.table-wrap{border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow-x:auto}table{border-collapse:collapse;width:100%;text-align:left;white-space:nowrap}th{color:var(--muted);font-size:10px;font-weight:400;padding:13px 12px}td{padding:13px 12px;border-top:1px solid var(--line);font:12px var(--mono)}th:first-child,td:first-child{padding-left:0}th:last-child,td:last-child{text-align:right;padding-right:0}.history-direction{font:11px var(--text);color:var(--blue)}.history-direction.upload-label{color:var(--orange)}#history-empty{text-align:center;color:#96998f;font-size:11px;padding:22px 0 26px;margin:0}.notes{padding:25px 0 32px;display:flex;flex-direction:column;gap:10px}.notes p{font-size:10px;color:var(--muted);line-height:1.8;margin:0;display:flex;gap:14px}.notes span{font:11px/1.8 var(--mono);color:#b2b5aa}footer{display:flex;align-items:center;justify-content:space-between;gap:15px;color:#979b90;border-top:1px solid var(--line);font-size:10px;padding:23px 0 30px}footer i{font-style:normal;margin:0 9px;color:#c2c5bb}footer>span:first-child{color:#6e7567}
@media(min-width:1400px){.shell{width:1180px}.intro{padding-top:54px;padding-bottom:42px}.test-card{padding:28px 28px 20px}.chart svg{height:114px}}
@media(max-width:800px){.shell{width:calc(100% - 40px)}.masthead{height:88px}.intro{padding:35px 0 28px}h1{font-size:38px}.intro-copy{font-size:12px}.route-strip{gap:16px}.route-line{max-width:120px}.route-line span{display:none}.latency{gap:12px;padding-left:16px}.latency .tiny-label{max-width:40px;line-height:1.5}.test-grid{gap:12px}.test-card{padding:20px 16px 16px}.card-title{gap:8px}.speed>span:first-child{font-size:64px}.stats{gap:5px}.stats strong{font-size:11px}.card-options{gap:6px;flex-wrap:wrap}.card-options select{max-width:135px}.card-options a,.card-options .text-button{font-size:9px}.card-note{min-height:29px}.brand{font-size:16px}.brand-separator{margin:0 8px}}
@media(max-width:620px){.shell{width:calc(100% - 32px)}.masthead{height:80px}.brand-mark{width:36px;height:36px;font-size:23px;border-radius:8px}.brand{font-size:14px;gap:9px}.brand small{font-size:8px;letter-spacing:1.7px}.brand-separator{margin:0 6px}.connection{font-size:9px;gap:7px}.intro{align-items:flex-start;gap:12px;padding:28px 0 24px}.eyebrow{font-size:9px;letter-spacing:1px;margin-bottom:13px}h1{font-size:35px;line-height:1.25;letter-spacing:-1px}.mobile-break{display:block}.intro-copy{max-width:210px;font-size:11px;line-height:1.7;margin-top:12px}.intro-actions{padding-top:29px;gap:8px}.intro-actions .button{min-width:115px;min-height:42px;padding:0 12px;font-size:11px;gap:18px}.intro-actions>span{max-width:115px;font-size:9px;line-height:1.6;text-align:center}.route-strip{gap:8px;padding:15px 0;flex-wrap:wrap}.route-end{min-width:90px;gap:7px}.route-end strong{font-size:12px}.route-end strong.mono{font-size:14px}.route-line{max-width:55px;gap:2px}.route-line i{width:3px;height:3px}.latency{padding-left:10px;gap:7px}.latency .tiny-label{font-size:8px;max-width:32px}.latency strong{font-size:20px}.latency small{font-size:9px}.tiny-label{font-size:9px}.section-heading{margin-top:24px}.test-grid{grid-template-columns:1fr;gap:16px}.test-card{padding:22px 20px 18px}.speed>span:first-child{font-size:76px}.speed{margin-top:25px}.chart svg{height:100px}.stats strong{font-size:13px}.card-options{gap:10px}.card-options select{max-width:none;flex:0 1 155px}.card-options a,.card-options .text-button{font-size:10px}.card-note{min-height:0}.history-section .section-heading{margin-top:22px}td{font-size:10px;padding:12px 8px}th{font-size:9px;padding:12px 8px}.notes{padding:22px 0}.notes p{font-size:9px;gap:10px}footer{font-size:9px;flex-wrap:wrap;padding:20px 0}footer>span:nth-child(2){order:3;width:100%;font-size:8px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}