:root{--bg: #f4f5f7;--panel: #ffffff;--ink: #1f2933;--ink-2: #52606d;--ink-3: #9aa5b1;--line: #e4e7eb;--brand: #1a63d8;--brand-ink: #ffffff;--danger: #d64545;--warn: #e8862c;--ok: #2f9e68;--radius: 8px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 12px rgba(16, 24, 40, .05)}.classroom{--bg: #16181d;--panel: #1e2128;--panel-2: #262a33;--ink: #e9ecf1;--ink-2: #a4acba;--ink-3: #6b7484;--line: #2f343e;--brand: #2b7fff;--brand-ink: #ffffff;--danger: #f4544c;--ok: #3ddc84;--radius: 10px;--shadow: 0 2px 8px rgba(0, 0, 0, .32);color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font:14px/1.6 system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif;color:var(--ink);background:var(--bg)}button{font:inherit;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:6px;padding:6px 12px;cursor:pointer;transition:background .15s,border-color 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solid var(--line);border-top-color:var(--brand);animation:wait-spin 1s linear infinite}@keyframes wait-spin{to{transform:rotate(360deg)}}.wait-meta{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0 0 16px;font-size:13px;text-align:left}.wait-meta dt{color:var(--ink-3)}.wait-meta dd{margin:0}.wait-tip{margin:0 0 18px;font-size:12px;color:var(--ink-3)}.wait-panel{flex:none;border-bottom:1px solid var(--line)}.wait-panel .panel-head{display:flex;align-items:center;gap:8px}.wait-count{font-style:normal;min-width:18px;height:18px;padding:0 5px;display:inline-flex;align-items:center;justify-content:center;border-radius:9px;background:#e5484d;color:#fff;font-size:11px;font-weight:700}.wait-all{margin-left:auto;font-size:12px;padding:3px 8px}.wait-list{list-style:none;margin:0;padding:4px 0;max-height:168px;overflow-y:auto}.wait-item{display:flex;align-items:center;gap:8px;padding:6px 12px;font-size:13px}.wait-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.wait-since{color:var(--ink-3);font-size:11px;white-space:nowrap}.wait-acts{display:flex;gap:4px}.wait-acts button{font-size:12px;padding:3px 8px;white-space:nowrap}.classroom .wait-panel{background:var(--panel)}.classroom .wait-acts .wait-no{background:var(--panel-2);color:#ff6b6b;border:1px solid var(--line)}.classroom .wait-all{background:var(--panel-2);color:var(--ink);border:1px solid var(--line)}.poll-card{position:absolute;right:16px;bottom:16px;z-index:35;width:288px;padding:12px 14px;border-radius:12px;background:#22262e;border:1px solid #333a45;box-shadow:0 10px 30px #00000080;color:#e8eaed}.poll-head{display:flex;align-items:flex-start;gap:8px}.poll-title{flex:1;font-size:14px;font-weight:600;line-height:1.4}.poll-min{flex:none;width:22px;height:22px;padding:0;border:0;border-radius:6px;background:transparent;color:#9aa1ab;cursor:pointer}.poll-min:hover{background:#2f3540}.poll-sub{margin:4px 0 10px;font-size:11px;color:#9aa1ab}.poll-opts{list-style:none;margin:0 0 10px;padding:0;display:flex;flex-direction:column;gap:6px}.poll-pick{display:flex;align-items:center;gap:8px;font-size:13px;cursor:pointer;padding:5px 8px;border-radius:7px;background:#2a2f38}.poll-pick:hover{background:#313742}.poll-res{position:relative;padding:6px 8px;border-radius:7px;background:#2a2f38;overflow:hidden;font-size:13px}.poll-res-txt{position:relative;z-index:1}.poll-res-num{position:relative;z-index:1;float:right;color:#9aa1ab;font-size:11px}.poll-bar{position:absolute;left:0;top:0;bottom:0;background:#2b7fff52;z-index:0;transition:width .3s}.poll-mine{font-style:normal;margin-left:6px;font-size:10px;color:var(--brand)}.poll-foot{display:flex;align-items:center;gap:8px}.poll-done{font-size:12px;color:var(--ok)}.poll-end{margin-left:auto;font-size:12px;padding:4px 9px;background:#2a2f38;color:#ff6b6b;border:1px solid #3a4150;border-radius:7px;cursor:pointer}.poll-fold{position:absolute;right:16px;bottom:16px;z-index:35;padding:8px 14px;border-radius:999px;border:1px solid #333a45;background:#22262e;color:#e8eaed;font-size:12px;cursor:pointer;box-shadow:0 6px 20px #0006}.poll-dlg h3{margin:0 0 12px;font-size:16px}.poll-q{margin:0 0 4px;font-size:14px;font-weight:600}.poll-sum{margin:0 0 12px;font-size:12px;color:var(--ink-3)}.poll-in{width:100%;margin-bottom:8px}.poll-opt-row{display:flex;gap:6px;align-items:flex-start}.poll-opt-row .poll-in{flex:1;min-width:0}.poll-del{flex:none;width:28px;height:28px;padding:0;border-radius:6px}.poll-add{margin-bottom:10px;font-size:12px;padding:4px 10px}.poll-flags{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:6px;font-size:12px}.poll-res-list{list-style:none;margin:0 0 6px;padding:0;display:flex;flex-direction:column;gap:7px}.poll-res-list li{position:relative;padding:7px 9px;border-radius:7px;background:var(--panel-2);overflow:hidden;font-size:13px}.poll-res-list li.win{box-shadow:inset 0 0 0 1px var(--brand)}.poll-res-list .poll-res-num{float:right;font-style:normal;color:var(--ink-3);font-size:11px}.poll-voters{position:relative;z-index:1;display:block;margin-top:3px;font-size:11px;color:var(--ink-3)}.classroom .dlg input[type=text],.classroom .dlg input:not([type]),.classroom .dlg .poll-in,.classroom .dlg textarea,.classroom .dlg select{background:var(--panel-2);color:var(--ink);border:1px solid var(--line)}.classroom .dlg .poll-in::placeholder{color:var(--ink-3)}.classroom .dlg button:not(.primary){background:var(--panel-2);color:var(--ink);border:1px solid var(--line)}.classroom .dlg button:not(.primary):hover:not(:disabled){filter:brightness(1.18)}.classroom .dlg button:not(.primary):disabled{opacity:.55}.group-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 16px;font-size:13px;background:#2b7fff24;border-bottom:1px solid rgba(43,127,255,.3);color:var(--ink)}.group-bar.back{background:#ffa53c29;border-bottom-color:#ffa53c59}.group-bar.notice{background:#2ea46e26;border-bottom-color:#2ea46e52}.group-bar button{font-size:12px;padding:4px 10px}.group-bar span{flex:1;min-width:160px}.group-dlg h3{margin:0 0 12px;font-size:16px}.group-sum{margin:0 0 10px;font-size:13px;color:var(--ink-2)}.group-list{list-style:none;margin:0 0 12px;padding:0;display:flex;flex-direction:column;gap:5px}.group-list li{display:flex;padding:6px 10px;border-radius:7px;background:var(--panel-2);font-size:13px}.group-name{flex:1}.group-n{color:var(--ink-3);font-size:12px}.group-lbl{display:block;margin-bottom:10px;font-size:13px}.group-lbl select{margin-left:8px}.group-row{display:flex;gap:6px;margin-top:5px}.group-row input{flex:1;min-width:0}.group-row button{flex:none;white-space:nowrap}.group-tip{margin:0 0 14px;font-size:12px;color:var(--ink-3)}.classroom .group-bar button:not(.primary),.classroom .leave-pop button:not(.primary),.classroom .wait-panel button:not(.primary){background:var(--panel-2);color:var(--ink);border:1px solid var(--line)}.classroom .group-bar button:not(.primary):hover{filter:brightness(1.2)}.caption-layer{position:absolute;left:50%;transform:translate(-50%);bottom:18px;z-index:32;width:min(760px,88%);display:flex;flex-direction:column;gap:4px;pointer-events:none}.caption-line{margin:0;padding:6px 14px;border-radius:8px;background:#0c0e12d1;color:#f2f4f7;font-size:15px;line-height:1.5;text-align:center;word-break:break-word}.caption-line.partial{opacity:.72}.caption-who{margin-right:8px;color:#8ab4ff;font-size:13px}.bg-row{gap:6px}.bg-row button{flex:1;font-size:12px;padding:6px 8px}.classroom .dlg .bg-row button.on{background:var(--brand);color:#fff;border-color:var(--brand)}.tag-hand{background:#fff2d6;color:#8a6116;font-weight:600}.classroom .tag-hand{background:#ffc14738;color:#ffc147}.mc-dlg h3{margin:0 0 8px;font-size:16px}.mc-sum{margin:0 0 12px;font-size:12px;color:var(--ink-3)}.mc-list{list-style:none;margin:0 0 8px;padding:0;display:flex;flex-direction:column;gap:2px}.mc-row{display:flex;align-items:flex-start;gap:9px;padding:7px 8px;border-radius:7px;cursor:pointer;font-size:13px}.mc-row:hover{background:var(--panel-2)}.mc-row input{margin-top:2px;flex:none}.mc-label{display:flex;flex-direction:column;gap:1px}.mc-hint{font-style:normal;font-size:11px;color:var(--ink-3)}.mc-row input:disabled+.mc-label{opacity:.5}.avatar{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;color:#fff;font-weight:600;line-height:1;flex:none;user-select:none;letter-spacing:-.5px}.member-avatar{display:inline-flex;flex:none;border-radius:50%;transition:box-shadow .15s}.member-avatar.talking{box-shadow:0 0 0 2px var(--ok),0 0 8px #2ea46e99}.cam-novideo{position:absolute;inset:0;display:grid;place-items:center;background:#1b1f26}.classroom .side-tabs{border-bottom:1px solid var(--line);padding-bottom:0}.classroom .side-tabs button.on{box-shadow:inset 0 -2px 0 var(--brand)}.cam-grid{justify-items:stretch}.cam-grid[data-count="3"] .cam-tile:last-child{grid-column:1 / -1;max-width:50%;margin:0 auto}