:root {
    --bg:#f5f7fb; --panel:#fff; --panel-2:#f7f9fc; --line:#e3e9f2; --line-2:#eef2f8;
    --fg:#111a2c; --dim:#667085; --muted:#98a2b3;
    --acc:#1877F7; --acc-2:#5b9cff; --acc-soft:#edf4ff; --acc-line:#c6ddff;
    --ink:#0f1f36;
    --ok:#16855a; --ok-soft:#e8f6ee; --bad:#d04b4b; --bad-soft:#fceeee;
    --stage:#0b1220;
    --r-lg:18px; --r-md:12px; --r-sm:9px;
    --shadow:0 1px 2px rgba(16,24,40,.03),0 8px 28px rgba(16,24,40,.055);
    --sans:"PingFang SC",-apple-system,BlinkMacSystemFont,"Helvetica Neue","Microsoft YaHei",sans-serif;
    --num:var(--sans);
    --header-h:64px;
    color-scheme:light;
  }
  * { box-sizing:border-box }
  [hidden] { display:none!important }
  html,body { background:var(--bg) }
  @media (max-width:760px) { html,body { overflow-x:clip } }
  body { margin:0; min-height:100vh; color:var(--fg); font:14px/1.6 var(--sans); -webkit-font-smoothing:antialiased; scrollbar-width:thin; scrollbar-color:#cdd2db transparent }
  button { font:inherit; color:inherit; touch-action:manipulation; -webkit-tap-highlight-color:transparent }
  .tabbar,.hint-touch { display:none }
  button:focus-visible,canvas:focus-visible { outline:2px solid var(--acc); outline-offset:2px }
  .num { font-family:var(--num); font-variant-numeric:tabular-nums }

  /* ── App bar ─────────────────────────────── */
  .appbar { position:sticky; top:0; z-index:20; height:var(--header-h); display:grid; grid-template-columns:1fr auto 1fr; align-items:center; gap:16px; padding:0 clamp(16px,3vw,32px); background:rgba(255,255,255,.9); backdrop-filter:saturate(1.4) blur(18px); border-bottom:1px solid var(--line) }
  .brand { display:flex; align-items:center; gap:11px; min-width:0 }
  .brand-mark { flex:0 0 34px; width:34px; height:34px; display:grid; place-items:center; border-radius:50%; background:var(--acc); color:#fff; box-shadow:0 4px 12px rgba(24,119,247,.2) }
  .brand h1 { margin:0; font-size:14px; font-weight:650; letter-spacing:-.01em; line-height:1.25; white-space:nowrap; overflow:hidden; text-overflow:ellipsis }
  .brand p { margin:1px 0 0; color:var(--dim); font-size:11px; letter-spacing:.01em; line-height:1.3; white-space:nowrap; overflow:hidden; text-overflow:ellipsis }
  .appbar-end { justify-self:end; display:flex; align-items:center; gap:8px }
  .profile { display:flex; align-items:center; gap:9px; min-width:0; padding:3px 11px 3px 3px; border:1px solid var(--line); border-radius:999px; background:var(--panel); box-shadow:0 1px 2px rgba(16,24,40,.03) }
  .avatar-wrap { position:relative; flex:0 0 32px; width:32px; height:32px }
  .profile-avatar { display:block; width:32px; height:32px; border-radius:50%; object-fit:cover; background:var(--acc-soft) }
  .avatar-wrap i { position:absolute; right:0; bottom:0; width:9px; height:9px; border:2px solid #fff; border-radius:50%; background:var(--ok) }
  .profile-copy { display:grid; min-width:0; line-height:1.25 }
  .profile-copy strong { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-size:12px; font-weight:600 }
  .appnav { display:flex; align-items:center; justify-content:center }
  .library-nav { height:38px; padding:0 14px; border:0; border-radius:var(--r-md); background:transparent; color:var(--dim); font-size:13px; font-weight:600; cursor:pointer }
  .library-nav:hover { background:var(--panel-2); color:var(--fg) }

  /* Segmented controls (view tabs, mode, mobile analysis tabs) */
  .seg { display:inline-flex; gap:2px; padding:3px; border-radius:var(--r-md); background:#eef2f8 }
  .seg button { min-width:72px; padding:6px 14px; border:0; border-radius:7px; background:transparent; color:var(--dim); font-size:13px; font-weight:500; cursor:pointer; white-space:nowrap; transition:color .15s,background .15s,box-shadow .15s }
  .seg button:hover { color:var(--fg) }
  .seg button.on { background:#fff; color:var(--fg); font-weight:600; box-shadow:0 1px 3px rgba(16,24,40,.1) }

  main { width:min(100%,1480px); margin:0 auto; padding:20px clamp(16px,3vw,32px) 40px }

  /* ── Analysis library / upload ───────────── */
  .library { display:grid; gap:28px; animation:library-in .35s ease both }
  @keyframes library-in { from { opacity:0; transform:translateY(6px) } }
  .library-head { display:flex; align-items:flex-end; justify-content:space-between; gap:24px }
  .library-head h2 { margin:0 0 4px; font-size:24px; line-height:1.25; letter-spacing:-.02em }
  .library-head p { margin:0; color:var(--dim); font-size:13px }
  .upload-zone { position:relative; display:grid; grid-template-columns:auto minmax(0,1fr) auto; align-items:center; gap:16px; width:min(100%,640px); min-height:94px; padding:18px 20px; border:1px dashed #c6d6ec; border-radius:var(--r-lg); background:#f8faff; text-align:left; cursor:pointer; transition:border-color .16s,background .16s,transform .16s }
  .upload-zone:hover,.upload-zone.dragging { border-color:var(--acc); background:var(--acc-soft); transform:translateY(-1px) }
  .upload-zone-icon { width:48px; height:48px; display:grid; place-items:center; border-radius:13px; background:#fff; color:var(--acc); box-shadow:0 1px 3px rgba(16,24,40,.08) }
  .upload-zone-icon svg { width:22px; height:22px }
  .upload-zone strong { display:block; margin-bottom:2px; font-size:14px }
  .upload-zone p { margin:0; color:var(--dim); font-size:12px }
  .upload-zone .format { color:var(--dim); font-size:11px; white-space:nowrap }
  .process-card { display:grid; grid-template-columns:52px minmax(0,1fr) auto; gap:16px; align-items:center; padding:18px 20px; border:1px solid var(--acc-line); border-radius:var(--r-lg); background:#f8faff; box-shadow:var(--shadow); animation:process-in .28s ease both }
  @keyframes process-in { from { opacity:0; transform:translateY(-5px) } }
  .process-orbit { position:relative; width:44px; height:44px; display:grid; place-items:center; border-radius:50%; background:var(--acc-soft); color:var(--acc) }
  .process-orbit::before { content:""; position:absolute; inset:0; border:2px solid transparent; border-top-color:var(--acc); border-radius:50%; animation:spin 1.15s linear infinite }
  @keyframes spin { to { transform:rotate(360deg) } }
  .process-orbit svg { width:19px; height:19px }
  .process-main { min-width:0 }
  .process-title { display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:8px }
  .process-title strong { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-size:13px }
  .process-title span { color:var(--acc); font:600 12px var(--num) }
  .process-bar { height:6px; overflow:hidden; border-radius:999px; background:#e5eafb }
  .process-bar i { display:block; width:0; height:100%; border-radius:inherit; background:var(--acc); transition:width .45s ease }
  .process-steps { display:flex; gap:18px; margin-top:8px; color:var(--muted); font-size:11px }
  .process-steps span { display:flex; align-items:center; gap:5px }
  .process-steps span::before { content:""; width:5px; height:5px; border-radius:50%; background:#c9cfda }
  .process-steps span.done { color:var(--ok) }
  .process-steps span.done::before { background:var(--ok) }
  .process-steps span.active { color:var(--acc); font-weight:600 }
  .process-steps span.active::before { background:var(--acc); box-shadow:0 0 0 4px rgba(24,119,247,.1) }
  .result-section { display:grid; gap:14px }
  .result-heading { display:flex; align-items:center; justify-content:space-between; gap:12px }
  .result-heading h3 { margin:0; font-size:15px }
  .result-heading span { color:var(--dim); font-size:12px }
  .result-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px }
  .result-card { position:relative; overflow:hidden; display:flex; flex-direction:column; min-width:0; padding:0; border:1px solid var(--line); border-radius:var(--r-lg); background:var(--panel); color:inherit; text-align:left; cursor:pointer; box-shadow:var(--shadow); transition:transform .2s,border-color .2s,box-shadow .2s }
  .result-card:hover { transform:translateY(-3px); border-color:var(--acc-line); box-shadow:0 16px 36px rgba(24,119,247,.1) }
  .result-card:focus-visible { outline:2px solid var(--acc); outline-offset:2px }
  .result-thumb { position:relative; overflow:hidden; aspect-ratio:16/9; background:linear-gradient(150deg,#31547d,#7b96b4 52%,#d4deea) }
  .result-thumb::before { content:""; position:absolute; inset:0; background:radial-gradient(110% 90% at 76% 18%,rgba(91,156,255,.24),transparent 54%),linear-gradient(180deg,transparent 48%,rgba(11,18,32,.5)); z-index:1; pointer-events:none }
  .result-thumb img,.result-thumb video { display:block; width:100%; height:100%; object-fit:cover; transition:transform .5s ease }
  .result-thumb video { pointer-events:none }
  .result-card:hover .result-thumb img,.result-card:hover .result-thumb video { transform:scale(1.035) }
  .result-cover-skeleton { position:absolute; inset:0; background:linear-gradient(100deg,#dce4dc 20%,#eef3ee 38%,#dce4dc 58%); background-size:220% 100%; animation:cover-shimmer 1.5s linear infinite; transition:opacity .3s }
  .result-thumb.cover-ready .result-cover-skeleton { opacity:0 }
  @keyframes cover-shimmer { to { background-position:-220% 0 } }
  .result-status { position:absolute; left:12px; top:12px; z-index:2; display:flex; align-items:center; gap:6px; padding:5px 10px; border-radius:999px; background:rgba(255,255,255,.92); backdrop-filter:blur(10px); color:var(--acc); font-size:10px; font-weight:600; letter-spacing:.02em }
  .result-status::before { content:""; width:5px; height:5px; border-radius:50%; background:currentColor }
  .result-score { position:absolute; left:12px; bottom:12px; z-index:2; display:flex; align-items:baseline; gap:4px; padding:6px 9px; border-radius:9px; background:rgba(12,23,18,.55); backdrop-filter:blur(10px); color:#fff; font:600 22px/1 var(--num) }
  .result-score b { font:inherit }
  .result-score small { font-size:10px; font-weight:500; opacity:.8 }
  .result-info { display:grid; gap:10px; padding:16px 17px 17px }
  .result-title { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-size:15px; font-weight:600; letter-spacing:-.01em }
  .result-meta { display:flex; align-items:center; justify-content:space-between; gap:10px; color:var(--dim); font-size:11px }
  .result-tags { display:flex; gap:6px; overflow:hidden }
  .result-tags span { padding:3px 8px; border-radius:999px; background:var(--panel-2); border:1px solid var(--line-2); color:var(--dim); white-space:nowrap }
  .result-open { display:flex; align-items:center; gap:3px; color:var(--acc); font-weight:600; white-space:nowrap }
  .result-open svg { width:13px; height:13px; transition:transform .2s }
  .result-card:hover .result-open svg { transform:translateX(2px) }
  .result-heading-title { display:flex; align-items:baseline; gap:8px }
  .result-tools { display:flex; align-items:center; gap:8px }
  .filter-seg { background:#eef2f8 }
  .filter-seg button { min-width:0; padding:5px 11px; font-size:12px }
  .compare-mode { display:inline-flex; align-items:center; gap:6px; height:34px; padding:0 12px; border:1px solid var(--line); border-radius:var(--r-md); background:var(--panel); color:var(--dim); font-size:12px; font-weight:600; cursor:pointer; transition:border-color .15s,background .15s,color .15s }
  .compare-mode svg { width:15px; height:15px }
  .compare-mode:hover:not(:disabled) { border-color:var(--acc-line); color:var(--acc) }
  .compare-mode.on { border-color:var(--acc-line); background:var(--acc-soft); color:var(--acc) }
  .compare-mode:disabled { color:var(--muted); background:var(--panel-2); cursor:default }
  .result-main { display:flex; flex-direction:column; width:100%; padding:0; border:0; background:none; color:inherit; text-align:left; cursor:pointer }
  .result-main:focus-visible { outline:2px solid var(--acc); outline-offset:-3px; border-radius:var(--r-lg) }
  .result-actions { position:absolute; z-index:4; top:10px; right:10px; display:flex; gap:6px; opacity:.88; transition:opacity .15s,transform .15s }
  .result-card:hover .result-actions { opacity:1 }
  .card-icon { display:grid; place-items:center; width:30px; height:30px; padding:0; border:1px solid rgba(255,255,255,.55); border-radius:50%; background:rgba(255,255,255,.9); backdrop-filter:blur(10px); color:#40516a; cursor:pointer; box-shadow:0 2px 8px rgba(16,24,40,.1); transition:background .15s,color .15s,border-color .15s,transform .15s }
  .card-icon svg { width:15px; height:15px }
  .card-icon:hover { background:#fff; color:var(--acc); transform:scale(1.05) }
  .card-icon.del:hover { color:var(--bad); border-color:#f2c9c9 }
  .card-icon.fav.on { background:var(--acc); border-color:var(--acc); color:#fff }
  .card-icon.fav.on:hover { background:#0f66db; color:#fff }
  .compare-check { display:none; position:absolute; z-index:5; top:12px; right:12px; width:25px; height:25px; place-items:center; border:1.5px solid rgba(255,255,255,.85); border-radius:50%; background:rgba(11,18,32,.38); backdrop-filter:blur(8px); color:transparent }
  .compare-check svg { width:14px; height:14px }
  .result-card.compare .result-actions { display:none }
  .result-card.compare .compare-check { display:grid }
  .result-card.compare .result-main { cursor:pointer }
  .result-card.compare.selected { border-color:var(--acc); box-shadow:0 0 0 2px var(--acc-line),0 14px 32px rgba(24,119,247,.12) }
  .result-card.compare.selected .compare-check { border-color:var(--acc); background:var(--acc); color:#fff }
  .compare-bar { position:fixed; z-index:40; left:50%; bottom:22px; transform:translateX(-50%); display:flex; align-items:center; gap:12px; padding:9px 10px 9px 17px; border:1px solid var(--line); border-radius:999px; background:rgba(255,255,255,.95); backdrop-filter:saturate(1.3) blur(18px); box-shadow:0 14px 40px rgba(16,24,40,.16); color:var(--dim); font-size:12px; white-space:nowrap }
  .compare-bar b { color:var(--acc); font:600 13px var(--num) }
  .compare-clear { padding:4px 6px; border:0; background:none; color:var(--dim); font-size:12px; cursor:pointer }
  .compare-clear:hover { color:var(--fg) }
  .compare-start { height:34px; padding:0 16px; border:0; border-radius:999px; background:var(--acc); color:#fff; font-size:12px; font-weight:600; cursor:pointer; box-shadow:0 4px 12px rgba(24,119,247,.22) }
  .compare-start:disabled { background:#b9cae1; box-shadow:none; cursor:default }
  .library-empty { display:grid; place-items:center; align-content:center; gap:4px; min-height:190px; padding:24px; border:1px dashed var(--line); border-radius:var(--r-lg); background:var(--panel-2); color:var(--dim); text-align:center; font-size:13px }
  .library-empty strong { color:var(--fg); font-size:14px; font-weight:600 }
  .detail-return { display:inline-flex; align-items:center; gap:7px; min-height:34px; padding:0 11px; border:1px solid var(--line); border-radius:var(--r-sm); background:var(--panel); color:var(--dim); font-size:12px; cursor:pointer }
  .detail-return:hover { border-color:var(--acc-line); color:var(--acc) }
  .detail-return svg { width:15px; height:15px }

  /* ── Analyze view ────────────────────────── */
  .toolbar { display:flex; align-items:center; justify-content:space-between; gap:12px 16px; flex-wrap:wrap; margin-bottom:16px }
  .list { display:flex; gap:6px; flex-wrap:wrap }
  .item { display:inline-flex; align-items:center; gap:6px; padding:7px 14px; border:1px solid var(--line); border-radius:999px; background:var(--panel); color:var(--fg); font-size:13px; font-weight:500; cursor:pointer; white-space:nowrap; transition:border-color .15s,background .15s,color .15s }
  .item:hover:not(:disabled) { border-color:var(--acc-line) }
  .item.on { background:var(--fg); border-color:var(--fg); color:#fff }
  .item:disabled { color:var(--muted); background:transparent; border-style:dashed; cursor:default }
  .item small { font-size:11px; color:inherit; opacity:.8 }
  .toolbar-label { color:var(--dim); font-size:12px; margin-right:8px }
  .analysis-pick { display:flex; align-items:center; min-width:0 }
  .analysis-pick select { max-width:320px; min-width:0; padding:7px 32px 7px 12px; border:1px solid var(--line); border-radius:var(--r-md); background:var(--panel) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23667085' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 11px center; color:var(--fg); font:500 13px/1.4 var(--sans); text-overflow:ellipsis; cursor:pointer; appearance:none; -webkit-appearance:none }
  .analysis-pick select:focus-visible { outline:2px solid var(--acc); outline-offset:2px }

  .analyze-grid { display:grid; grid-template-columns:minmax(0,1fr) 360px; gap:20px; align-items:stretch }
  .player-col { display:flex; flex-direction:column; gap:12px; min-width:0 }

  .player-card { background:var(--panel); border:1px solid var(--line); border-radius:var(--r-lg); overflow:hidden; box-shadow:var(--shadow) }
  .stage { position:relative; aspect-ratio:16/9; background:var(--stage); overflow:hidden; isolation:isolate }
  .stage video { position:absolute; inset:0; width:100%; height:100%; object-fit:contain; z-index:1; animation:fade .35s ease }
  @keyframes fade { from { opacity:0 } }
  .stage .missing { position:absolute; inset:0; z-index:2; display:grid; place-items:center; padding:40px; color:#a9b1bf; text-align:center; line-height:1.9; font-size:13px }
  .missing small { color:#717b8c; font-size:12px }
  #modelCanvas { position:absolute; inset:0; z-index:3; width:100%; height:100%; touch-action:none; cursor:grab }
  #modelCanvas.dragging { cursor:grabbing }
  #phaseTag { position:absolute; z-index:7; left:14px; top:14px; display:flex; align-items:center; gap:7px; padding:5px 11px; border-radius:999px; background:rgba(15,19,26,.66); border:1px solid rgba(255,255,255,.14); backdrop-filter:blur(10px); color:#fff; font-size:12px; font-weight:500 }
  #phaseTag::before { content:""; width:6px; height:6px; border-radius:50%; background:#7ee2b0; box-shadow:0 0 8px #7ee2b0 }
  #phaseTag:empty { display:none }
  #modelHint { position:absolute; z-index:8; right:14px; top:14px; display:none; padding:5px 11px; border-radius:999px; background:rgba(255,255,255,.92); color:var(--acc); font-size:12px; font-weight:500 }
  #note { position:absolute; z-index:7; left:14px; bottom:14px; max-width:min(62%,560px); padding:9px 13px; border-radius:var(--r-md); border-left:3px solid; background:rgba(15,19,26,.74); backdrop-filter:blur(12px); color:#fff; font-size:13px; line-height:1.5; opacity:0; transform:translateY(6px); transition:opacity .3s,transform .3s }
  #note[style*="opacity: 1"] { transform:none }
  .stage.model #note { display:none!important }

  .controls { display:flex; align-items:center; gap:14px; padding:11px 16px 10px; border-top:1px solid var(--line-2) }
  .controls button { flex:0 0 auto; height:35px; padding:0 14px; border:1px solid var(--line); border-radius:var(--r-sm); background:var(--panel); color:var(--fg); font-size:13px; cursor:pointer; transition:border-color .15s,background .15s,color .15s }
  .controls button:hover:not(:disabled) { border-color:var(--acc-line); background:var(--acc-soft); color:var(--acc) }
  .controls button:disabled { color:var(--muted); background:var(--panel-2); cursor:default }
  #play { width:40px; height:40px; padding:0; border:0; border-radius:50%; background:var(--acc); color:#fff; font-size:12px; box-shadow:0 4px 14px rgba(24,119,247,.24) }
  #play:hover { background:#0f66db; color:#fff }
  #track { position:relative; flex:1; min-width:180px; height:68px; padding-top:20px; cursor:pointer; touch-action:pan-y; --progress:0% }
  #track .phase-lane { position:absolute; inset:0 0 auto; height:21px; display:flex; gap:6px; overflow:visible; border-radius:0 }
  #track .phase-segment { position:relative; top:auto; left:auto!important; width:auto!important; flex:1; min-width:0; height:21px; overflow:hidden; padding:0 1px; border-radius:0; background:transparent; color:var(--muted); font:500 10px/20px var(--sans); white-space:nowrap; text-overflow:ellipsis; transition:color .2s }
  #track .phase-segment.on { color:var(--acc); font-weight:600 }
  #track .quality-lane { position:absolute; z-index:1; left:0; right:0; top:23px; height:6px; overflow:hidden; border-radius:999px; background:#edf1f7 }
  #track .quality-segment { position:absolute; top:0; height:100%; min-width:2px; pointer-events:none }
  #track .quality-segment.ok { background:linear-gradient(90deg,#57c793,#95ddb9) }
  #track .quality-segment.bad { background:linear-gradient(90deg,#e67373,#f1aaaa) }
  #track .quality-segment + .quality-segment { box-shadow:-1px 0 0 rgba(255,255,255,.9) }
  #track .bar,#track .fill { position:absolute; top:38px; left:0; height:5px; border-radius:999px }
  #track .bar { right:0; background:#e5eaf2 }
  #track .fill { background:linear-gradient(90deg,var(--acc),#61a3ff); box-shadow:0 2px 8px rgba(24,119,247,.14) }
  #track .playhead { position:absolute; z-index:4; top:34px; left:var(--progress); width:13px; height:13px; border-radius:50%; background:#fff; border:3px solid var(--acc); transform:translateX(-50%); box-shadow:0 2px 8px rgba(13,54,40,.2); pointer-events:none; transition:transform .12s }
  #track:hover .playhead,#track.scrubbing .playhead { transform:translateX(-50%) scale(1.15) }
  #track::after { content:""; position:absolute; z-index:0; left:0; right:0; top:55px; height:1px; background:var(--line-2) }
  #track .orb { position:absolute; z-index:3; top:51px; width:8px; height:8px; border:1.5px solid var(--acc); border-radius:1px; background:#fff; transform:translateX(-50%) rotate(45deg); box-shadow:none; transition:transform .15s }
  #track .orb:hover { transform:translateX(-50%) rotate(45deg) scale(1.3) }
  #track .track-tip { position:absolute; z-index:5; left:var(--tip-x,0%); top:-26px; padding:4px 8px; border-radius:6px; background:var(--ink); color:#fff; font:10px var(--num); pointer-events:none; opacity:0; transform:translateX(-50%) translateY(3px); transition:opacity .12s,transform .12s; white-space:nowrap }
  #track:hover .track-tip,#track.scrubbing .track-tip { opacity:1; transform:translateX(-50%) }
  #time { flex:0 0 auto; min-width:98px; padding:5px 8px; border:1px solid var(--line-2); border-radius:7px; background:var(--panel-2); color:var(--dim); font-size:11px; text-align:center; font-variant-numeric:tabular-nums }

  .keyframe-bar { display:flex; align-items:center; gap:12px 16px; flex-wrap:wrap; padding:12px 14px; background:var(--panel); border:1px solid var(--line); border-radius:var(--r-lg); box-shadow:var(--shadow) }
  .keyframe-bar > strong { font-size:13px; font-weight:600; white-space:nowrap }
  .keyframe-bar > strong small { display:block; color:var(--muted); font-size:11px; font-weight:400 }
  .keyframe-list { display:flex; gap:8px; flex-wrap:wrap; flex:1 }
  .keyframe-button { display:inline-flex; align-items:center; gap:8px; padding:6px 12px 6px 6px; border:1px solid var(--line); border-radius:var(--r-sm); background:var(--panel); font-size:13px; cursor:pointer; transition:border-color .15s,background .15s }
  .keyframe-button span { padding:2px 6px; border-radius:5px; background:var(--acc-soft); color:var(--acc); font-size:11px; font-weight:600 }
  .keyframe-button:hover { border-color:var(--acc-line); background:var(--acc-soft) }
  .keyframe-button.on { border-color:var(--acc); background:var(--acc); color:#fff }
  .keyframe-button.on span { background:rgba(255,255,255,.2); color:#fff }
  .legend-strip { display:flex; gap:6px 14px; flex-wrap:wrap; color:var(--dim); font-size:12px }
  .legend-strip i { display:inline-block; width:8px; height:8px; margin-right:6px; border-radius:2px; vertical-align:0 }
  .legend-strip i.dia { width:7px; height:7px; background:var(--acc); transform:rotate(45deg) }
  kbd { padding:0 5px; border:1px solid var(--line); border-bottom-width:2px; border-radius:4px; background:var(--panel); font:11px var(--num) }

  /* Analysis side panel */
  .analysis-dashboard { min-width:0; display:flex; flex-direction:column; background:var(--panel); border:1px solid var(--line); border-radius:var(--r-lg); box-shadow:var(--shadow); overflow:hidden }
  .analysis-tabs { display:none }
  .insights-grid { flex:1; min-height:0; display:flex; flex-direction:column }
  .card { padding:14px 16px; min-width:0 }
  .card + .card { border-top:1px solid var(--line-2) }
  .card h3 { display:flex; align-items:center; justify-content:space-between; gap:8px; margin:0 0 10px; font-size:13px; font-weight:600 }
  .card h3 em { font-style:normal; color:var(--muted); font-size:11px; font-weight:400 }
  #phaseName { padding:2px 8px; border-radius:999px; background:var(--acc-soft); color:var(--acc); font-size:11px; font-weight:500 }
  #bodySvg { height:176px; border-radius:var(--r-md); background:var(--panel-2); overflow:hidden }
  #bodySvg svg { display:block; width:100%; height:100% }
  #bodySvg ellipse { transition:fill .25s }
  #bodySvg text { font-size:28px }
  .legend { display:flex; align-items:center; gap:8px; margin-top:8px; color:var(--muted); font-size:11px }
  .legend .grad { flex:1; height:4px; border-radius:2px; background:linear-gradient(90deg,#2ecc71,#f1c40f,#e74c3c) }
  #forces { display:grid; grid-template-columns:1fr 1fr; gap:8px }
  .force { padding:9px 11px; border-radius:var(--r-md); background:var(--panel-2) }
  .force span { display:block; color:var(--dim); font-size:11px; line-height:1.35; white-space:nowrap; overflow:hidden; text-overflow:ellipsis }
  .force b { display:block; margin:4px 0 6px; font-family:var(--num); font-size:20px; font-weight:600; line-height:1; font-variant-numeric:tabular-nums }
  .meter { height:4px; border-radius:2px; background:#e6e9ef; overflow:hidden }
  .meter i { display:block; height:100%; border-radius:2px; transition:width .2s }
  #notes { flex:1; min-height:0; display:flex; flex-direction:column }
  #notes ul { position:relative }
  #notes ul { flex:1; min-height:0; margin:0 -6px; padding:0; overflow:auto }
  #notes li { list-style:none; display:grid; grid-template-columns:44px 1fr; gap:8px; margin:0 0 2px; padding:7px 8px; border-radius:var(--r-sm); color:#3d4555; font-size:13px; line-height:1.5; cursor:pointer; transition:background .15s }
  #notes li:hover { background:var(--panel-2) }
  #notes li.on { background:var(--acc-soft); color:var(--fg) }
  #notes li b { display:flex; align-items:center; gap:6px; height:20px; color:var(--dim); font:500 12px/1 var(--num); font-variant-numeric:tabular-nums }
  #notes li b::before { content:""; flex:0 0 6px; height:6px; border-radius:50%; background:var(--c) }
  .disc { padding:10px 16px; border-top:1px solid var(--line-2); color:var(--muted); font-size:11px; line-height:1.55 }

  /* ── Report view ─────────────────────────── */
  #reportPanel { max-width:1120px; margin:0 auto }
  .report-panel { display:grid; gap:16px }
  .r-card { padding:24px; background:var(--panel); border:1px solid var(--line); border-radius:var(--r-lg); box-shadow:var(--shadow) }
  .report-hero { display:grid; grid-template-columns:auto minmax(0,1fr); gap:28px; align-items:center }
  .score-ring { --score:0; position:relative; width:128px; height:128px; display:grid; place-content:center; text-align:center; border-radius:50%; background:conic-gradient(var(--acc) calc(var(--score)*1%),#e8ebf2 0) }
  .score-ring::after { content:""; position:absolute; inset:10px; border-radius:50%; background:#fff }
  .score-ring > * { position:relative; z-index:1 }
  .score-ring strong { font:600 40px/1 var(--num); font-variant-numeric:tabular-nums }
  .score-ring span { margin-top:6px; color:var(--dim); font-size:11px }
  .hero-head { display:flex; align-items:center; gap:10px; flex-wrap:wrap }
  .report-title { margin:0; font-size:22px; font-weight:600; line-height:1.3 }
  .pill { display:inline-flex; align-items:center; padding:2px 9px; border-radius:999px; font-size:12px; font-weight:500; white-space:nowrap }
  .pill.acc { background:var(--acc-soft); color:var(--acc) }
  .pill.bad { background:var(--bad-soft); color:var(--bad) }
  .pill.ok { background:var(--ok-soft); color:var(--ok) }
  .report-meta { margin:4px 0 12px; color:var(--muted); font-size:12px }
  .report-verdict { margin:0; color:#3d4555; font-size:15px; line-height:1.75 }
  .report-split { display:grid; grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr); gap:16px }
  .r-card h2 { margin:0 0 16px; font-size:16px; font-weight:600 }
  .strengths { display:grid; gap:10px }
  .strengths span { display:flex; gap:10px; color:#3d4555; font-size:14px; line-height:1.6 }
  .strengths span::before { content:"✓"; flex:0 0 20px; height:20px; display:grid; place-items:center; margin-top:2px; border-radius:50%; background:var(--ok-soft); color:var(--ok); font-size:11px; font-weight:700 }
  .priority-list { display:grid; gap:10px }
  .priority-item { display:grid; grid-template-columns:28px 1fr; gap:12px; padding:12px 14px; border-radius:var(--r-md); background:var(--panel-2) }
  .priority-item > b { width:28px; height:28px; display:grid; place-items:center; border-radius:8px; background:var(--acc); color:#fff; font:600 12px/1 var(--num) }
  .priority-item strong { display:block; font-size:14px; font-weight:600 }
  .priority-item p { margin:2px 0 0; color:var(--dim); font-size:13px; line-height:1.6 }
  .dimension-list { display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:12px }
  .dimension { padding:14px; border-radius:var(--r-md); background:var(--panel-2) }
  .dimension > b { font-size:13px; font-weight:600 }
  .dimension strong { display:block; margin:8px 0 8px; font:600 28px/1 var(--num); color:var(--fg) }
  .dimension small { color:var(--muted); font-size:12px; font-weight:400 }
  .dimension p { margin:10px 0 0; color:var(--dim); font-size:12px; line-height:1.6 }
  .report-table-wrap { overflow:auto; margin:0 -8px }
  #reportDetails table { width:100%; border-collapse:collapse; font-size:13px; line-height:1.65 }
  #reportDetails th,#reportDetails td { padding:12px 8px; border-bottom:1px solid var(--line-2); text-align:left; vertical-align:top }
  #reportDetails tr:last-child td { border-bottom:0 }
  #reportDetails th { color:var(--muted); font-size:12px; font-weight:500 }
  #reportDetails td:first-child { white-space:nowrap }
  #reportDetails td small { color:var(--muted); font:12px var(--num) }
  #reportDetails td b { display:block; margin-top:4px; font-weight:600 }
  #reportDetails td:last-child { color:var(--dim) }
  .training-list { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; counter-reset:step }
  .training-list article { position:relative; padding:14px; border-radius:var(--r-md); border:1px solid var(--line) }
  .training-list article::before { content:""; position:absolute; left:14px; right:14px; top:-1px; height:2px; background:var(--acc); border-radius:0 0 2px 2px }
  .training-list span { color:var(--acc); font-size:12px; font-weight:600 }
  .training-list h3 { margin:6px 0; font-size:14px; font-weight:600 }
  .training-list b { display:block; font-size:12px; font-weight:500; color:var(--fg) }
  .training-list p { margin:6px 0 0; color:var(--dim); font-size:12px; line-height:1.6 }
  .followup { margin:0; color:#3d4555; line-height:1.75 }

  /* ── Compare modal ───────────────────────── */
  .modal { position:fixed; inset:0; z-index:60; display:grid; place-items:center; padding:24px }
  .modal-backdrop { position:absolute; inset:0; background:rgba(8,15,28,.48); backdrop-filter:blur(5px) }
  .modal-card { position:relative; z-index:1; width:min(1120px,100%); max-height:calc(100vh - 48px); overflow:auto; padding:22px; border-radius:22px; background:var(--panel); box-shadow:0 30px 80px rgba(7,15,30,.28) }
  .modal-head { display:flex; align-items:flex-start; justify-content:space-between; gap:16px; margin-bottom:14px }
  .modal-head h2 { margin:0 0 3px; font-size:20px; letter-spacing:-.02em }
  .modal-head p { margin:0; color:var(--dim); font-size:12px }
  .modal-close { flex:0 0 34px; width:34px; height:34px; padding:0; border:1px solid var(--line); border-radius:50%; background:var(--panel); color:var(--dim); font-size:22px; line-height:1; cursor:pointer }
  .modal-close:hover { border-color:var(--acc-line); color:var(--acc) }
  body.modal-open { overflow:hidden }
  .compare-verdict { margin-bottom:16px; padding:13px 15px; border:1px solid var(--acc-line); border-radius:12px; background:var(--acc-soft); color:#154b96; font-size:13px; line-height:1.7 }
  .compare-verdict strong { color:var(--acc) }
  .compare-tag { display:inline-flex; align-items:center; margin-right:6px; padding:2px 8px; border-radius:999px; background:var(--acc); color:#fff; font-size:11px; font-weight:600; vertical-align:1px }
  .compare-tag.warn { background:var(--bad) }
  .compare-tag.flat { background:#7d8fa8 }
  .compare-loading { color:var(--dim) }
  .compare-videos { display:grid; grid-template-columns:1fr 1fr; gap:16px }
  .compare-video { overflow:hidden; border:1px solid var(--line); border-radius:14px; background:var(--panel-2) }
  .compare-video video { display:block; width:100%; aspect-ratio:16/9; object-fit:contain; background:var(--stage) }
  .compare-video-empty { display:grid; place-items:center; aspect-ratio:16/9; background:var(--stage); color:#9fb0c4; font-size:12px }
  .compare-caption { display:grid; gap:3px; padding:11px 13px 13px }
  .compare-caption h3 { margin:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-size:14px }
  .compare-caption p { display:flex; align-items:center; justify-content:space-between; gap:8px; margin:0; color:var(--dim); font-size:11px }
  .compare-caption b { color:var(--acc); font:600 16px var(--num) }
  .compare-details { margin-top:18px; padding-top:16px; border-top:1px solid var(--line-2) }
  .compare-details h3 { margin:0 0 10px; font-size:14px }
  .delta-list { display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:8px }
  .delta-item { display:flex; align-items:center; justify-content:space-between; gap:8px; padding:9px 11px; border-radius:9px; background:var(--panel-2); color:var(--dim); font-size:12px }
  .delta-item b { color:var(--fg); font-weight:500 }
  .delta-item em { font-style:normal; font-weight:600; font-variant-numeric:tabular-nums }
  .delta-item em.up { color:var(--ok) }
  .delta-item em.down { color:var(--bad) }
  .delta-item em.flat { color:var(--muted) }

  /* ── Responsive ──────────────────────────── */
  @media (min-width:1100px) {
    /* 侧栏不撑高行：高度跟随播放器列，点评列表内部滚动 */
    .analysis-dashboard { contain:size }
  }
  @media (max-width:1280px) { .analyze-grid { grid-template-columns:minmax(0,1fr) 320px } .keyframe-bar .legend-strip { flex-basis:100% } .dimension-list { grid-template-columns:repeat(3,minmax(0,1fr)) } .result-grid { grid-template-columns:repeat(2,minmax(0,1fr)) } }
  @media (max-width:1099px) {
    .analyze-grid { grid-template-columns:1fr }
    .insights-grid { display:grid; grid-template-columns:1fr 1fr }
    #body { grid-row:span 2; border-right:1px solid var(--line-2) }
    #forcesCard { border-top:0 }
    #notes ul { max-height:260px }
    #bodySvg { height:320px }
    .training-list { grid-template-columns:repeat(2,minmax(0,1fr)) }
  }
  /* ── 手机：按 App 交互适配 ─────────────── */
  @media (max-width:760px) {
    :root { --header-h:48px; --tabbar-h:56px; --gutter:12px }
    body { background:var(--bg) }
    .appbar { grid-template-columns:minmax(0,1fr) auto; gap:10px; padding:0 max(var(--gutter),env(safe-area-inset-right)) 0 max(var(--gutter),env(safe-area-inset-left)) }
    .appnav { display:none }
    .brand-mark { flex-basis:28px; width:28px; height:28px; border-radius:8px; font-size:14px }
    .brand h1 { font-size:16px }
    .brand-long,#panelTabs { display:none }
    .brand p { font-size:9px }
    .profile { padding:2px 8px 2px 2px; border:1px solid var(--line); background:var(--panel); box-shadow:none }
    .profile-copy { display:grid }
    .detail-return { justify-self:start }
    main { padding:10px max(var(--gutter),env(safe-area-inset-right)) calc(var(--tabbar-h) + 24px + env(safe-area-inset-bottom)) max(var(--gutter),env(safe-area-inset-left)) }

    /* 底部 Tab 栏 */
    .tabbar { position:fixed; z-index:30; left:0; right:0; bottom:0; display:grid; grid-template-columns:1fr 1fr; height:calc(var(--tabbar-h) + env(safe-area-inset-bottom)); padding-bottom:env(safe-area-inset-bottom); background:rgba(255,255,255,.92); backdrop-filter:saturate(1.4) blur(18px); -webkit-backdrop-filter:saturate(1.4) blur(18px); border-top:1px solid var(--line) }
    .tabbar button { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px; border:0; background:none; color:var(--muted); font-size:11px; font-weight:500; cursor:pointer }
    .tabbar svg { width:24px; height:24px }
    .tabbar button.on { color:var(--acc) }
    body.locked > .tabbar { display:none }

    /* 工具栏：动作横滑 + 画面切换 */
    .toolbar { display:grid; grid-template-columns:minmax(0,1fr); gap:10px; margin-bottom:10px }
    .list { flex-wrap:nowrap; overflow-x:auto; scrollbar-width:none; margin:0 calc(-1 * var(--gutter)); padding:0 var(--gutter); scroll-padding:0 var(--gutter) }
    .list::-webkit-scrollbar { display:none }
    .item { min-height:36px; padding:0 16px }
    .toolbar-label { display:none }
    .analysis-pick { width:100%; order:-1 }
    .analysis-pick select { flex:1; max-width:none; min-height:38px; font-size:14px }
    .seg button { min-height:34px }

    /* 视频通栏吸顶：下滑看分析时仍可见 */
    .analyze-grid,.player-col { display:contents }
    .player-card { position:sticky; top:var(--header-h); z-index:10; margin:0 calc(-1 * var(--gutter)); border-width:0 0 1px; border-radius:0; box-shadow:0 6px 16px -10px rgba(16,24,40,.25) }
    #note { left:8px; bottom:8px; max-width:calc(100% - 88px); padding:5px 8px; font-size:11px; border-radius:var(--r-sm) }
    #phaseTag { left:8px; top:8px; padding:4px 9px; font-size:11px }
    #modelHint { right:8px; top:8px; max-width:64%; padding:4px 9px; font-size:11px; line-height:1.4 }
    .controls { flex-wrap:nowrap; gap:9px; padding:8px var(--gutter) }
    #play { width:38px; height:38px }
    #track { min-width:0; height:64px }
    #track .phase-segment { font-size:9px }
    #track .quality-lane { top:23px }
    #track .bar,#track .fill { top:38px }
    #track .playhead { top:34px }
    #track .orb { top:51px }
    #track::after { top:55px }
    #time { min-width:0; padding:4px 6px; font-size:10px }
    .controls #modelBtn { height:32px; padding:0 9px; font-size:12px }

    /* 关键姿态：横滑卡片 */
    .keyframe-bar { flex-direction:column; align-items:stretch; gap:10px; margin-top:12px; padding:12px 0; border-radius:var(--r-lg) }
    .keyframe-bar > *,.keyframe-bar .legend-strip { flex:none }
    .keyframe-bar > strong { display:flex; align-items:baseline; gap:8px; padding:0 14px }
    .keyframe-bar > strong small { display:inline }
    .keyframe-list { flex-wrap:nowrap; overflow-x:auto; scrollbar-width:none; padding:0 14px; scroll-snap-type:x proximity }
    .keyframe-list::-webkit-scrollbar { display:none }
    .keyframe-button { flex:0 0 auto; min-height:40px; scroll-snap-align:start }
    .legend-strip { padding:0 14px; font-size:11px }

    /* 分析卡片 */
    .analysis-dashboard { margin-top:12px }
    .analysis-tabs { display:grid; grid-template-columns:repeat(3,1fr); margin:12px 12px 0 }
    .analysis-tabs button { min-width:0; padding:6px 4px }
    .insights-grid { display:block }
    .insights-grid .card { border:0 }
    .insights-grid .card:not(.tab-active),#notes:not(.tab-active) { display:none }
    #bodySvg { height:min(78vw,320px) }
    #notes ul { max-height:none; margin:0 -8px }
    #notes li { padding:10px 8px }

    /* 报告 */
    #reportPanel .report-panel { gap:12px }
    .r-card { padding:16px; border-radius:var(--r-lg) }
    .r-card h2 { margin-bottom:12px }
    .report-hero { grid-template-columns:1fr; gap:14px; justify-items:center; text-align:center; padding-top:22px }
    .hero-head { justify-content:center }
    .report-title { font-size:20px; width:100% }
    .score-ring { width:112px; height:112px }
    .score-ring strong { font-size:34px }
    .report-verdict { font-size:14px; text-align:left }
    .report-split { grid-template-columns:1fr; gap:12px }
    .dimension-list { grid-template-columns:1fr; gap:0 }
    .dimension { display:grid; grid-template-columns:1fr auto; align-items:center; column-gap:12px; padding:12px 0; border-radius:0; background:none; border-top:1px solid var(--line-2) }
    .dimension:first-child { border-top:0; padding-top:0 }
    .dimension strong { margin:0; font-size:20px }
    .dimension .meter { grid-column:1 / -1; margin-top:8px }
    .dimension p { grid-column:1 / -1; margin-top:6px }
    /* 观察表 → 卡片列表 */
    .report-table-wrap { margin:0; overflow:visible }
    #reportDetails table,#reportDetails tbody,#reportDetails tr,#reportDetails td { display:block; width:auto }
    #reportDetails thead { display:none }
    #reportDetails tr { padding:12px 0; border-top:1px solid var(--line-2) }
    #reportDetails tr:first-child { border-top:0; padding-top:0 }
    #reportDetails td { padding:0; border:0 }
    #reportDetails td:first-child { color:var(--dim); font-size:12px }
    #reportDetails td:first-child br { display:none }
    #reportDetails td:first-child small { margin-left:6px }
    #reportDetails td:nth-child(2) { margin:6px 0 4px }
    #reportDetails td:nth-child(2) .pill { margin-right:6px }
    #reportDetails td:nth-child(2) b { display:inline }
    /* 练习计划：横滑 */
    .training-list { display:flex; overflow-x:auto; scrollbar-width:none; scroll-snap-type:x mandatory; margin:0 -16px; padding:2px 16px 4px; scroll-padding:0 16px }
    .training-list::-webkit-scrollbar { display:none }
    .training-list article { flex:0 0 78%; scroll-snap-align:start }

    .auth-card input { font-size:16px }
    .library { gap:20px }
    .library-head { align-items:flex-start }
    .library-head h2 { font-size:21px }
    .upload-zone { grid-template-columns:auto minmax(0,1fr); width:100%; padding:16px; min-height:88px }
    .upload-zone .format { display:none }
    .process-card { grid-template-columns:44px minmax(0,1fr); padding:14px }
    .process-steps { gap:10px; overflow:hidden }
    .process-steps span { white-space:nowrap }
    .result-grid { grid-template-columns:1fr; gap:14px }
    .result-info { padding:13px 14px 14px }
    .result-score { font-size:20px }
    .result-heading { align-items:center }
    .result-heading-title { gap:6px }
    .result-tools { gap:6px }
    .filter-seg button { padding:5px 9px }
    .compare-mode { width:34px; padding:0; justify-content:center }
    .compare-mode span { display:none }
    .compare-bar { bottom:calc(14px + env(safe-area-inset-bottom)); width:calc(100% - 24px); justify-content:space-between; padding:8px 9px 8px 15px }
    .modal { padding:10px; align-items:start; overflow:auto }
    .modal-card { max-height:none; padding:16px; border-radius:18px }
    .modal-head h2 { font-size:18px }
    .compare-videos { grid-template-columns:1fr; gap:12px }
    .compare-details { margin-top:14px; padding-top:14px }
    .appnav .library-nav { display:none }
  }
  /* 触屏：去掉悬停效果，改为按压反馈；提示文案切换为手势 */
  @media (hover:none) {
    .result-actions { opacity:1 }
    .item:hover:not(:disabled),.keyframe-button:hover,.controls button:hover:not(:disabled),#notes li:hover { border-color:var(--line); background:var(--panel); color:inherit }
    .item.on:hover { background:var(--fg); border-color:var(--fg); color:#fff }
    .keyframe-button.on:hover { background:var(--acc); border-color:var(--acc); color:#fff }
    #notes li:hover { background:transparent }
    #notes li.on { background:var(--acc-soft) }
    #play:hover { background:var(--acc); color:#fff }
    button:not(:disabled):active,#notes li:active { transform:scale(.97); transition:transform .08s }
    .hint-desk,.kbd-hint { display:none }
    .hint-touch { display:inline }
  }
  
  /* ── Auth gate ───────────────────────────── */
  body.locked > header, body.locked > main { display:none }
  .auth-gate { min-height:100vh; display:grid; place-items:center; padding:24px 16px }
  .auth-card { width:min(380px,100%); padding:28px; background:var(--panel); border:1px solid var(--line); border-radius:var(--r-lg); box-shadow:var(--shadow) }
  .auth-card .brand { margin-bottom:20px }
  .auth-card h2 { margin:0 0 4px; font-size:20px; font-weight:600 }
  .auth-card > p { margin:0 0 18px; color:var(--dim); font-size:13px }
  .auth-card form { display:grid; gap:10px }
  .auth-card input { height:40px; padding:0 12px; border:1px solid var(--line); border-radius:var(--r-sm); font:inherit; color:var(--fg); background:var(--panel-2) }
  .auth-card input:focus { outline:2px solid var(--acc); outline-offset:1px; background:var(--panel) }
  .auth-card button { height:40px; border:0; border-radius:var(--r-sm); background:var(--acc); color:#fff; font-weight:600; cursor:pointer }
  .auth-card button:disabled { opacity:.55; cursor:default }
  #authStatus { margin:12px 0 0; min-height:20px; font-size:13px; color:var(--dim); word-break:break-word }
  #authStatus[data-kind="ok"] { color:var(--ok) } #authStatus[data-kind="bad"] { color:var(--bad) }
  .user-chip { max-width:180px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; color:var(--dim); font-size:12px }
  .user-chip:empty { display:none }
  .signout { padding:4px 10px; border:1px solid var(--line); border-radius:var(--r-sm); background:var(--panel); color:var(--dim); font-size:12px; cursor:pointer }
  .signout:hover { color:var(--acc); border-color:var(--acc-line) }
  @media (max-width:760px) {
    .appbar .appbar-end { display:flex }
    .user-chip { display:none }
  }
  @media (prefers-reduced-motion:reduce) { *,*::before,*::after { animation-duration:.01ms!important; transition-duration:.01ms!important } }

/* ══════════════════════════════════════════════════════
   M2 · 外壳与导航（侧边栏 / 顶栏 / 底部 Tab / 我的）
   ══════════════════════════════════════════════════════ */

/* 把旧变量映射到 tokens（tokens.css 是唯一色板来源） */
:root {
  --bg: var(--kine-bg); --panel: var(--kine-surface); --panel-2: var(--kine-surface-muted);
  --line: var(--kine-line); --line-2: var(--kine-line-soft);
  --fg: var(--kine-ink); --dim: var(--kine-ink-muted); --muted: var(--kine-ink-soft);
  --acc: var(--kine-accent); --acc-2: #5b9cff; --acc-soft: var(--kine-accent-soft); --acc-line: var(--kine-accent-line);
  --ok: var(--kine-ok); --ok-soft: var(--kine-ok-soft); --bad: var(--kine-bad); --bad-soft: var(--kine-bad-soft);
  --stage: var(--kine-stage);
  --r-lg: var(--kine-radius-lg); --r-md: var(--kine-radius-md); --r-sm: var(--kine-radius-sm);
  --shadow: 0 1px 2px rgba(16,24,40,.03), 0 10px 30px rgba(16,24,40,.05);
  --header-h: 64px; --sidebar-w: 228px;
}

/* ── 侧边栏 ─────────────────────────────── */
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: var(--sidebar-w); z-index: 30;
  display: flex; flex-direction: column; gap: 6px; padding: 18px 14px;
  background: var(--panel); border-right: 1px solid var(--line);
}
.sidebar .brand { padding: 4px 6px 16px }
.sidebar .brand-mark {
  flex: 0 0 34px; width: 34px; height: 34px; border-radius: 11px;
  display: grid; place-items: center; background: var(--kine-ink-card); color: #fff;
  font: 700 15px/1 var(--sans); box-shadow: none;
}
.side-nav { display: grid; gap: 4px }
.side-item {
  display: flex; align-items: center; gap: 10px; min-height: 40px; padding: 0 12px;
  border: 0; border-radius: 10px; background: none; color: var(--dim);
  font: 500 14px/1 var(--sans); text-align: left; cursor: pointer;
  transition: background .15s, color .15s;
}
.side-item svg { width: 18px; height: 18px; flex: 0 0 18px }
.side-item:hover { background: var(--panel-2); color: var(--fg) }
.side-item.on { background: var(--acc-soft); color: var(--acc); font-weight: 600 }
.side-foot { margin-top: auto; display: grid; gap: 8px; padding-top: 12px; border-top: 1px solid var(--line-2) }
.side-foot .profile { width: 100%; padding: 4px 6px; border: 0; background: none; box-shadow: none }
.side-foot .signout { height: 34px; border: 1px solid var(--line); border-radius: 9px; background: var(--panel); color: var(--dim); font-size: 12px; cursor: pointer }
.side-foot .signout:hover { border-color: var(--acc-line); color: var(--acc) }

/* ── 主区域外壳 ─────────────────────────── */
.shell { margin-left: var(--sidebar-w); min-height: 100dvh; display: flex; flex-direction: column }
.appbar {
  position: sticky; top: 0; z-index: 20; height: 64px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 0 clamp(16px, 3vw, 28px);
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(1.4) blur(18px); -webkit-backdrop-filter: saturate(1.4) blur(18px);
  border-bottom: 1px solid var(--line);
}
.appbar-title { display: flex; align-items: center; gap: 10px; min-width: 0 }
.appbar-title h2 { margin: 0; font-size: 15px; font-weight: 600; line-height: 1.25; letter-spacing: -.01em; white-space: nowrap }
.appbar-title p { margin: 1px 0 0; font-size: 11.5px; color: var(--dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis }
.back-btn {
  flex: 0 0 32px; width: 32px; height: 32px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 9px; background: var(--panel); color: var(--dim); cursor: pointer;
}
.back-btn:hover { border-color: var(--acc-line); color: var(--acc) }
.back-btn svg { width: 16px; height: 16px }
.appbar-end { display: flex; align-items: center; gap: 10px }
.demo-badge {
  font-size: 11px; color: var(--dim); padding: 4px 9px; border-radius: 999px;
  background: var(--panel-2); border: 1px solid var(--line-2); white-space: nowrap;
}
.appbar .appnav { display: flex; align-items: center }
.appbar .seg { background: #eef2f8 }

/* ── 底部 Tab（<1024px）─────────────────── */
.tabbar {
  display: none; position: fixed; z-index: 40; left: 0; right: 0; bottom: 0;
  grid-template-columns: 1fr 1fr; height: calc(58px + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(1.4) blur(18px); -webkit-backdrop-filter: saturate(1.4) blur(18px);
  border-top: 1px solid var(--line);
}
.tabbar button {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  border: 0; background: none; color: var(--muted); font: 600 11px/1 var(--sans); cursor: pointer;
}
.tabbar svg { width: 23px; height: 23px }
.tabbar button.on { color: var(--acc) }
body.locked > .tabbar { display: none }

/* ── 我的 ──────────────────────────────── */
.profile-view { display: grid; gap: 16px; max-width: 780px; animation: library-in .3s ease both }
.profile-hero {
  display: flex; align-items: center; gap: 14px; padding: 20px;
  border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--panel); box-shadow: var(--shadow);
}
.profile-avatar-lg { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; background: var(--acc-soft); border: 2px solid var(--panel) }
.profile-hero-copy { flex: 1; min-width: 0 }
.profile-hero-copy h2 { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: -.01em }
.profile-hero-copy p { margin: 3px 0 0; font-size: 12.5px; color: var(--dim) }
.profile-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px }
.profile-stats > div {
  display: grid; gap: 4px; justify-items: center; padding: 16px;
  border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--panel);
}
.profile-stats strong { font: 600 22px/1 var(--num) }
.profile-stats span { font-size: 11.5px; color: var(--dim) }
.profile-copy-line { margin: 8px 0 0; color: var(--dim); font-size: 13px; line-height: 1.7 }

/* ── 响应式：<1024 收起侧边栏，显示底部 Tab ── */
@media (max-width: 1023px) {
  .sidebar { display: none }
  .shell { margin-left: 0 }
  .tabbar { display: grid }
  .appbar { height: 56px; padding: 0 14px; gap: 10px }
  .appbar-title { flex: 1; min-width: 0 }
  .appbar-title h2 { font-size: 15px; overflow: hidden; text-overflow: ellipsis; max-width: 42vw }
  .appbar-title p { display: none }
  .demo-badge { display: none }
  .appbar .seg { padding: 2px }
  .appbar .seg button { min-width: 0; padding: 5px 10px; font-size: 12px }
  main { padding-bottom: calc(58px + 28px + env(safe-area-inset-bottom)) }
}
@media (max-width: 760px) {
  .appbar { padding: 0 max(12px, env(safe-area-inset-left)) 0 max(12px, env(safe-area-inset-left)) }
  .profile-stats > div { padding: 14px 10px }
}

/* ── M2 细节修正 ─────────────────────────── */
#detailReturn { display: none }
.upload-zone { width: 100%; max-width: 880px; min-height: 104px }
.upload-zone-icon { width: 52px; height: 52px; border-radius: 15px }
@media (max-width: 1023px) {
  .appbar .appnav { display: flex }
  .appbar #panelTabs:not([hidden]) { display: inline-flex }
  .appbar { gap: 8px }
  .appbar-title h2 { max-width: 32vw }
}


/* 移动端详情：顶栏只留返回 + 面板切换，隐藏重复标题 */
@media (max-width: 1023px) {
  body.in-detail .appbar-title > div { display: none }
  body.in-detail .appbar-title { flex: 0 0 auto }
  body.in-detail .appnav { flex: 1; justify-content: flex-end }
}

/* 列表底部：本地 / 云端模式说明 */
.library-note { margin: 4px 0 0; color: var(--dim); font-size: 12.5px; line-height: 1.6 }