html{scroll-behavior:smooth}section[id]{scroll-margin-top:16px}.evidence-bank{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.evidence-chip{border:1px solid #c2a677;border-radius:8px;background:#fff4dd;color:#23404b;padding:13px 15px;text-align:left;font-size:16px;line-height:1.6;cursor:grab}.evidence-chip:hover,.evidence-chip.selected{background:#f4d99e;border-color:#ad772b}.evidence-chip.placed{background:#e8f3ed;border-color:#81b5a1;cursor:pointer}.cause-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;margin-top:20px}.cause-box{border:2px dashed #b2c9cb;border-radius:9px;min-height:132px;background:#f9fcfa;padding:13px;cursor:pointer}.cause-box strong{display:block;font-size:18px;color:#174354;margin-bottom:10px}.cause-box:focus-visible,.cause-box.drag-over{outline:3px solid #dbad63;background:#fff9ed}.cause-box.wrong{border-color:#cc705e;background:#fff3f0}.cause-drop .evidence-chip{width:100%;display:block}.source-line{color:#687d82;font-size:14px;text-align:right;line-height:1.5;margin:16px 0 0}.check-row{display:flex;align-items:center;gap:20px;margin-top:15px}.check-row .feedback{margin:0}.video-bridge{border-radius:12px;background:linear-gradient(105deg,#102d43,#194d55);color:#eaf1ef;display:flex;align-items:center;gap:18px;padding:17px 26px;margin:0 0 24px;box-shadow:0 8px 24px #123b481b}.video-bridge span{font-size:29px;font-weight:800;color:#e8c078;white-space:nowrap}.video-bridge p{margin:0;font-size:16px;line-height:1.6}.timeline-bank-label{display:inline-block;font-weight:700;color:#a15c21;margin:3px 0 9px;font-size:16px}.timeline-bank{border:1px dashed #becacc;border-radius:8px;background:#f9faf8;min-height:70px;padding:11px;display:flex;flex-wrap:wrap;gap:9px;align-items:start}.time-chip{border:1px solid #c1783c;border-radius:7px;background:#df8d4b;color:#fff;padding:10px 12px;text-align:left;line-height:1.45;font-size:15px;cursor:grab;max-width:100%}.time-chip.selected{outline:3px solid #e4c179;outline-offset:2px}.time-chip.detail-chip{background:#f3f6fa;color:#244254;border-color:#9cb5cf}.time-chip.placed{width:100%;font-size:14px;padding:8px 9px}.timeline-scroll{overflow-x:auto;margin:18px 0 14px;padding-bottom:5px}.timeline-grid{min-width:1120px;display:grid;grid-template-columns:repeat(5,minmax(210px,1fr));gap:10px;position:relative}.timeline-grid::before{content:"";position:absolute;left:8%;right:8%;top:145px;height:3px;background:#718b99;z-index:0}.time-column{min-width:0;position:relative;z-index:1}.time-drop{border:2px dashed #bbcad0;background:#f7faf9;border-radius:8px;padding:8px;cursor:pointer;overflow:auto}.event-drop{height:135px}.detail-drop{height:196px}.time-drop::after{content:"放置词条";color:#a6b7b9;font-size:13px;display:block;text-align:center;margin-top:18px}.time-drop:has(.time-chip)::after{display:none}.time-drop.drag-over,.time-drop:focus-visible{background:#fff6e4;outline:3px solid #d4ab5e;outline-offset:-3px}.time-drop.wrong{border-color:#ca7666;background:#fff3f0}.time-date{height:61px;display:flex;align-items:center;justify-content:center;position:relative;font-size:17px;font-weight:800;color:#243f50;text-align:center}.time-date::before{content:"";position:absolute;left:50%;top:1px;width:17px;height:17px;transform:translateX(-50%);border:2px solid #ad753d;background:#d5e9f5;border-radius:50%}.detail-label{margin-top:2px}@media(max-width:850px){.evidence-bank,.cause-grid{grid-template-columns:1fr}.evidence-chip{font-size:15px}.check-row{flex-direction:column;align-items:flex-start}.video-bridge{align-items:flex-start}.timeline-grid{min-width:1120px}.time-drop{overflow:auto}}@media(max-width:500px){.video-bridge{flex-direction:column;gap:3px;padding:13px 16px}}

.scroll-hint{display:none;color:#617980;font-size:13px;margin:11px 0 0}
@media(max-width:850px){.scroll-hint{display:block}}


.return-battle{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;white-space:nowrap}.return-battle[hidden]{display:none}