:root{--bg: #eef3f6;--surface: #ffffff;--surface-soft: #f7fafb;--surface-strong: #edf7f8;--text: #14212b;--muted: #60717e;--line: #d9e3ea;--primary: #075e74;--primary-strong: #04485a;--success: #0d7a4f;--success-soft: #e6f6ef;--warning: #a45f00;--warning-soft: #fff3dc;--danger: #b42318;--danger-soft: #fde8e5;--focus: #8bd2df;color:var(--text);background:var(--bg);font-family:Microsoft YaHei UI,Segoe UI,ui-sans-serif,system-ui,sans-serif;font-size:16px;line-height:1.5}*{box-sizing:border-box}body{margin:0;min-width:320px;background:linear-gradient(180deg,#e7f4f7e6 0,#eef3f600 300px),var(--bg)}h1,h2,h3,p,figure{margin-top:0}button{min-height:44px;border:1px solid var(--primary);border-radius:7px;padding:0 16px;background:var(--primary);color:#fff;font:inherit;font-weight:800;cursor:pointer;transition:background .16s ease,border-color .16s ease,opacity .16s ease}button:hover:not(:disabled){background:var(--primary-strong);border-color:var(--primary-strong)}button:focus-visible{outline:3px solid var(--focus);outline-offset:2px}button:disabled{cursor:not-allowed;opacity:.48}button.secondary{background:#fff;color:var(--primary)}button.danger{border-color:var(--danger);background:var(--danger)}.workspace{width:min(960px,calc(100vw - 32px));margin:22px auto 36px;display:grid;gap:14px}.app-header{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;padding:4px 2px 8px}.eyebrow{margin:0 0 4px;color:var(--primary);font-size:.76rem;font-weight:800;text-transform:uppercase}h1{margin-bottom:8px;font-size:clamp(1.7rem,3vw,2.35rem);line-height:1.08;letter-spacing:0}h2{margin-bottom:0;font-size:1.05rem}.header-copy{max-width:640px;margin-bottom:0;color:var(--muted);font-size:.98rem}.header-meta{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.header-meta span{min-height:32px;display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:0 11px;background:var(--surface);color:var(--muted);font-size:.83rem;font-weight:700;white-space:nowrap}.measurement-shell{display:grid;gap:12px}.primary-action{display:grid}#prepareBtn{min-height:50px;font-size:1rem}.video-stage{position:relative;overflow:hidden;border:1px solid #bfd5dc;border-radius:8px;background:#10171c;box-shadow:0 16px 42px #14212b29}.media-frame{position:relative;margin:0;width:100%;aspect-ratio:var(--camera-aspect-ratio, 4 / 3)}.media-frame figcaption{position:absolute;left:12px;bottom:12px;z-index:4;min-height:28px;display:inline-flex;align-items:center;border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:0 10px;background:#080e12a3;color:#e8f4f6;font-size:.78rem;font-weight:750}video,.media-frame canvas{display:block;width:100%;height:100%;background:#10171c;object-fit:contain}.media-frame video,.media-frame canvas{transform:scaleX(-1);transform-origin:center}canvas{background:var(--surface-soft)}#overlayCanvas{position:absolute;inset:0;z-index:3;pointer-events:none;background:transparent}#frameCanvas{display:none}.signal-overlay{position:absolute;top:12px;left:12px;z-index:5;width:min(360px,calc(100% - 24px));display:grid;gap:8px}.state{width:fit-content;min-width:104px;min-height:32px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:0 12px;background:#e7f4f7eb;color:var(--primary);font-size:.78rem;font-weight:850}.state-collecting,.state-analyzing,.state-initializing,.state-preparing,.state-camera-testing{background:#fff3dcf0;color:var(--warning)}.state-failed,.state-canceled{background:#fde8e5f2;color:var(--danger)}.state-ready,.state-completed{background:#e6f6eff2;color:var(--success)}.quality{min-height:42px;margin:0;border:1px solid rgba(255,255,255,.16);border-radius:8px;padding:10px 12px;background:#080e12ad;color:#f3fbfc;font-size:.9rem;font-weight:800;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.readiness-strip{display:grid;grid-template-columns:1fr;gap:6px}.readiness-strip span{min-height:32px;display:flex;align-items:center;border:1px solid rgba(255,255,255,.14);border-radius:8px;padding:6px 9px;background:#080e1294;color:#dce9ec;font-size:.78rem;font-weight:750;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.readiness-strip .status-good{border-color:#b8e3d0cc;background:#e6f6efeb;color:var(--success)}.readiness-strip .status-warn{border-color:#eed6aadb;background:#fff3dceb;color:var(--warning)}.readiness-strip .status-bad{border-color:#f1b7b0db;background:#fde8e5eb;color:var(--danger)}.countdown-badge{position:absolute;top:12px;right:12px;z-index:5;min-height:36px;display:inline-flex;align-items:center;border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:0 12px;background:#080e12a8;color:#f3fbfc;font-size:.84rem;font-weight:850;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.star-rating{position:absolute;right:12px;bottom:64px;z-index:5;min-height:34px;display:inline-flex;align-items:center;gap:2px;border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:0 10px;background:#080e12a8;color:#ffffff6b;font-size:1.02rem;line-height:1;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}body[data-state=completed] .star-rating{bottom:14px}.star-rating[hidden]{display:none}.live-diagnostic{position:absolute;left:12px;right:12px;bottom:106px;z-index:7;min-height:28px;border:1px solid rgba(255,255,255,.18);border-radius:8px;padding:6px 8px;background:#080e12b8;color:#f3fbfc;font-size:.72rem;font-weight:800;line-height:1.3;overflow-wrap:anywhere}.live-diagnostic[hidden]{display:none}.star-icon{width:16px;text-align:center}.star-icon.filled{color:#f5c84b}.snr-label{margin-left:8px;padding-left:8px;border-left:1px solid rgba(255,255,255,.18);color:#f3fbfc;font-size:.72rem;font-weight:850;letter-spacing:0;white-space:nowrap}.constraint-bar{position:absolute;left:50%;bottom:68px;z-index:6;width:min(92%,620px);display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px;transform:translate(-50%)}.constraint-bar[hidden]{display:none}.constraint-badge{min-height:30px;display:inline-flex;align-items:center;border:1px solid rgba(241,183,176,.86);border-radius:999px;padding:0 10px;background:#fde8e5f0;color:var(--danger);font-size:.78rem;font-weight:800;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.video-actions{position:absolute;left:50%;bottom:14px;z-index:6;display:flex;gap:10px;transform:translate(-50%)}.video-actions button{min-width:130px;box-shadow:0 8px 24px #0000003d}.meter-block{display:grid;gap:8px}.status-row{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:.86rem;font-weight:750}.meter{height:12px;border-radius:999px;overflow:hidden;background:#dfe8ee}.meter span{display:block;width:0;height:100%;background:var(--success);transition:width .18s ease}.results-panel,.settings-panel,.diagnostics-panel{border:1px solid var(--line);border-radius:8px;padding:14px;background:var(--surface);box-shadow:0 1px 2px #14212b0a}.result-summary{min-height:72px;display:grid;gap:5px;margin-bottom:10px;border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--surface-soft)}.result-summary strong{font-size:1.08rem}.result-summary span{color:var(--muted)}.summary-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:4px 0}.summary-metrics span{display:grid;gap:2px;border:1px solid rgba(13,122,79,.18);border-radius:8px;padding:10px;background:#ffffffa8}.summary-metrics small{color:var(--muted);font-size:.76rem;font-weight:700}.summary-metrics strong{color:var(--text);font-size:1.08rem;font-variant-numeric:tabular-nums}.result-summary-good{border-color:#b8e3d0;background:var(--success-soft)}.result-summary-pending{border-color:#eed6aa;background:var(--warning-soft)}.result-summary-bad{border-color:#f1b7b0;background:var(--danger-soft)}.result-disclaimer{margin:0 0 12px;color:var(--muted);font-size:.84rem}.results{min-height:84px;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px}.results:empty:before{content:"完成分析后会显示详细结果。";color:var(--muted)}.result-card{border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--surface-soft)}.result-metric-card{min-height:112px;display:grid;grid-template-columns:auto 1fr;align-content:center;align-items:center;column-gap:10px;row-gap:4px;background:#fff}.result-icon{grid-row:span 2;width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(7,94,116,.12);border-radius:8px;background:var(--surface-strong);font-size:1.35rem;line-height:1}.result-label{color:var(--muted);font-size:.8rem;font-weight:800}.result-value{color:var(--text);font-size:1.28rem;font-variant-numeric:tabular-nums;line-height:1.15}.result-card h3{margin-bottom:8px;font-size:.94rem}.result-card p{display:flex;justify-content:space-between;gap:10px;margin-bottom:6px;color:var(--muted);font-variant-numeric:tabular-nums}body[data-state=collecting] .signal-overlay{width:min(300px,calc(100% - 24px));gap:6px}body[data-state=collecting] .quality{min-height:36px;padding:8px 10px;font-size:.82rem}body[data-state=collecting] .readiness-strip{display:none}.settings-panel{display:grid;gap:12px}.settings-panel summary{cursor:pointer;color:var(--text);font-weight:850}.settings-grid{display:grid;gap:8px;margin-top:10px}.settings-panel label{color:var(--muted);font-size:.84rem;font-weight:700}.settings-panel select{width:100%;min-height:42px;border:1px solid var(--line);border-radius:7px;padding:0 10px;background:#fff;color:var(--text);font:inherit}.check-row{display:flex!important;align-items:center;gap:8px}.check-row input{width:18px;height:18px}.run-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.run-summary div{min-height:66px;border:1px solid var(--line);border-radius:8px;padding:9px;background:var(--surface-soft)}.summary-label{display:block;color:var(--muted);font-size:.76rem;font-weight:700}.run-summary strong{display:block;margin-top:5px;font-size:1.06rem;font-variant-numeric:tabular-nums}.debug-only,.diagnostics-panel{display:none}body[data-debug=true] .debug-only{display:flex;gap:10px}body[data-debug=true] .run-summary.debug-only{display:grid}body[data-debug=true] .diagnostics-panel{display:block}.debug-actions button{flex:1}.events{max-height:260px;overflow:auto;margin:0;padding-left:20px}.events:empty:before{content:"暂无事件。";color:var(--muted)}.events li{margin-bottom:8px;color:var(--muted);font-size:.9rem}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:.01ms!important;scroll-behavior:auto!important}}@media(max-width:720px){.workspace{width:min(100% - 20px,960px);margin:12px auto 24px}.app-header{align-items:flex-start;flex-direction:column}.header-meta{justify-content:flex-start}.signal-overlay{top:8px;left:8px;width:calc(100% - 118px)}.readiness-strip{grid-template-columns:1fr}.media-frame figcaption{display:none}.countdown-badge{top:8px;right:8px;bottom:auto;min-height:32px;padding-inline:10px}.star-rating{right:8px;bottom:64px;min-height:30px;padding-inline:8px;font-size:.9rem}body[data-state=completed] .star-rating{bottom:10px}.star-icon{width:14px}.live-diagnostic{left:8px;right:8px;bottom:96px;font-size:.66rem}.snr-label{margin-left:6px;padding-left:6px;font-size:.68rem}.constraint-bar{bottom:58px;gap:4px}.constraint-badge{min-height:26px;max-width:100%;padding-inline:8px;font-size:.72rem}.video-actions{width:calc(100% - 20px);bottom:10px}.video-actions button{min-width:0;flex:1;padding-inline:10px}.run-summary{grid-template-columns:1fr}}