:root{--ink: #0b1f33;--muted: #5a6b7a;--line: #c5ced6;--paper: #f2f5f8;--surface: #fff;--teal: #0e7c86;--danger: #b3261e}*{box-sizing:border-box}html,body,#app{margin:0;min-height:100%}body{font-family:"Source Sans 3",PingFang SC,Noto Sans SC,sans-serif;background:var(--paper);color:var(--ink)}a{color:var(--teal);text-decoration:none}.wrap{max-width:960px;margin:0 auto;padding:16px}.top{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--surface);border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--ink)}.brand-logo{width:32px;height:32px;border-radius:8px;object-fit:cover}.nav a{margin-left:16px;color:var(--muted)}.nav a.router-link-active{color:var(--teal);font-weight:600}h1{font-size:1.6rem;margin:8px 0 16px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}.card,.panel{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px}.card:hover{border-color:var(--teal)}.muted{color:var(--muted);font-size:14px}.btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 16px;border:0;border-radius:4px;background:var(--teal);color:#f4fbfc;font-weight:600;cursor:pointer}.btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}.btn:disabled{opacity:.5}input,textarea,select{width:100%;height:44px;padding:0 12px;border:1px solid var(--line);border-radius:4px;font:inherit;background:#fff}textarea{height:auto;min-height:120px;padding:12px}.row{display:flex;gap:8px;flex-wrap:wrap}.err{color:var(--danger);font-size:14px}.toast{margin:8px 0;color:var(--teal)}@media(max-width:800px){.nav a{margin-left:10px}}.play-root{max-width:none;margin:0;padding:0}.play-page{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;background:#2b3036;display:flex;flex-direction:column}.play-bar{flex-shrink:0;display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px 12px;background:#0b1f33eb;color:#f4fbfc}.play-title{font-size:14px;opacity:.9;margin-right:auto}.play-bar .btn.ghost{background:transparent;color:#f4fbfc;border-color:#ffffff40}.toolbar{display:flex;flex-wrap:wrap;gap:6px}.toolbar .btn{height:36px;padding:0 12px}.toolbar .btn.on{background:var(--teal);color:#f4fbfc;border-color:var(--teal)}.stage-fill{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;overflow:hidden}.paper-sheet{position:relative;height:100%;max-width:100%;touch-action:none;-webkit-user-select:none;user-select:none}.paper-sheet img{display:block;height:100%;width:auto;max-width:100vw;pointer-events:none}.paper-sheet.select{cursor:pointer}.paper-sheet.pen,.paper-sheet.highlight{cursor:crosshair}.paper-sheet.eraser{cursor:cell}.play-toast{position:absolute;left:12px;top:56px;z-index:50;background:#fff;padding:6px 10px;border-radius:4px}.play-audio{position:absolute;left:12px;bottom:12px;z-index:45;width:min(420px,70vw)}.sheet{position:fixed;top:0;right:0;bottom:0;width:min(320px,92vw);z-index:55;transform:translate(110%);transition:transform .2s ease;overflow:auto;margin:0;border-radius:0}.sheet.open{transform:translate(0)}.sheet-close{width:100%;margin-bottom:8px}@media(max-aspect-ratio:3/4){.stage-fill{align-items:flex-start;overflow:auto}.paper-sheet{height:auto;width:100%}.paper-sheet img{width:100%;height:auto;max-width:none}}.draw-layer{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none}.hot-chip{position:absolute;display:flex;align-items:center;gap:4px;padding:0 4px;border:1px solid rgba(14,124,134,.45);background:#f4fbfcd1;color:var(--ink);border-radius:3px;font-size:12px;line-height:1;cursor:pointer}.hot-chip strong{color:var(--teal)}.hot-chip.active,.hot-chip.done{border-color:var(--teal)}.hot-chip.doubt{background:#fff4cc}.hot-chip.star{background:#e6f4f5}.hot-chip em{font-style:normal;font-size:11px}.hot-chip em.ok{color:var(--teal)}.hot-chip em.bad{color:var(--danger)}.picker{position:fixed;z-index:30;background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;box-shadow:0 8px 24px #0b1f331f}.sheet-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:10px}.sheet-q{min-height:44px;border:1px solid var(--line);background:#fff;border-radius:4px;cursor:pointer;font:inherit}.sheet-q small{display:block;color:var(--teal)}.sheet-q.done{border-color:var(--teal)}.sheet-q.doubt{background:#fff4cc}.sheet-q.star{background:#e6f4f5}.sheet-q.active{outline:2px solid var(--teal)}.mp-qr{display:block;width:220px;max-width:70%;margin:16px auto}.word-pop{position:fixed;z-index:20;background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px;width:260px;box-shadow:0 8px 24px #0b1f331f}