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.modal-title{margin-bottom:0;text-align:left;font-size:16px}.earth-demo-modal-tools{display:flex;align-items:center;gap:6px;flex-shrink:0}.earth-demo-zoom-btn{min-width:32px;height:32px;padding:0 8px;border:1px solid var(--border);border-radius:6px;background:rgba(0,40,60,.5);color:var(--text);font-size:16px;line-height:1;cursor:pointer}.earth-demo-zoom-btn:hover{border-color:var(--accent);color:var(--accent)}.earth-demo-zoom-reset{font-size:12px}.earth-demo-zoom-label{min-width:48px;text-align:center;font-size:12px;color:var(--text-muted);font-variant-numeric:tabular-nums}.earth-demo-modal-close{width:32px;height:32px;border:1px solid var(--border);border-radius:6px;background:rgba(0,40,60,.5);color:var(--text);font-size:20px;line-height:1;cursor:pointer}.earth-demo-modal-close:hover{border-color:var(--accent);color:var(--accent)}.earth-demo-zoom-viewport{position:relative;flex:1 1 auto;width:100%;height:min(86vh,920px);min-height:420px;overflow:hidden;border-radius:8px;border:1px solid rgba(0,212,255,.25);background:rgba(0,8,16,.65);cursor:grab;touch-action:none;user-select:none}.earth-demo-zoom-viewport.is-dragging{cursor:grabbing}.earth-demo-modal-image{display:block;width:auto;height:auto;max-width:100%;max-height:100%;margin:0;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(1);transform-origin:center center;border-radius:0;border:none;pointer-events:none}.earth-demo-zoom-hint{margin:8px 0 0;font-size:11px;color:var(--text-muted);text-align:center;flex-shrink:0}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center}.modal-dialog{background:linear-gradient(160deg,#0a1828 0,#050d18 100%);border:1px solid var(--border);border-radius:12px;padding:24px;max-width:480px;width:90%;box-shadow:0 0 40px rgba(0,212,255,.15)}.modal-title{font-size:18px;font-weight:700;color:var(--accent);text-align:center;margin-bottom:18px;letter-spacing:2px}.copyright-qr-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}.copyright-qr-item{text-align:center}.copyright-qr-image{width:100%;max-width:160px;height:auto;border-radius:8px;border:1px solid var(--border);background:#fff;padding:4px;-webkit-user-drag:none;user-drag:none;pointer-events:none}.copyright-qr-caption{font-size:12px;color:var(--text-muted);margin-top:8px}.copyright-note{font-size:12px;color:var(--text-muted);line-height:1.6;text-align:center;margin-bottom:16px}.modal-actions{display:flex;justify-content:center;gap:10px}.modal-btn{padding:8px 28px;border-radius:6px;border:1px solid var(--border);background:rgba(255,255,255,.05);color:var(--text);font-size:13px;font-family:var(--font-body);cursor:pointer;transition:.2s}.modal-btn:hover{border-color:var(--accent);color:var(--accent)}.modal-btn-primary{background:var(--accent);border-color:var(--accent);color:#03121f;font-weight:600}.modal-btn-primary:hover{background:var(--accent-gold);border-color:var(--accent-gold);color:#03121f;box-shadow:0 0 16px rgba(0,212,255,.4)}@media (max-width:768px){:root{--panel-width:280px}.stage-corner-stack{max-width:220px}.movement-controls button{width:30px;height:30px}}
/* 2026-09-07: 展开的知识点导航与太阳活动教学高亮 */
.mode-select-native{position:absolute!important;width:1px!important;height:1px!important;overflow:hidden!important;clip:rect(0 0 0 0)!important;white-space:nowrap!important;opacity:0!important;pointer-events:none!important}
.mode-buttons{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.mode-btn{min-height:52px;padding:8px 9px;border:1px solid rgba(0,212,255,.2);border-radius:8px;background:linear-gradient(145deg,rgba(8,37,61,.9),rgba(5,23,40,.82));color:#c8dbea;font-family:var(--font-body);font-size:13px;font-weight:600;line-height:1.25;text-align:left;cursor:pointer;transition:transform .18s ease,border-color .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease}
.mode-btn span{display:block;margin-bottom:3px;color:#46e6ff;font-family:var(--font-display);font-size:10px;letter-spacing:.16em;opacity:.8}
.mode-btn:hover{transform:translateY(-1px);border-color:rgba(71,230,255,.62);background:linear-gradient(145deg,rgba(10,52,82,.96),rgba(6,29,49,.9));color:#fff}
.mode-btn.active{border-color:#47e6ff;background:linear-gradient(145deg,rgba(0,161,201,.25),rgba(4,38,67,.96));color:#fff;box-shadow:inset 0 0 0 1px rgba(71,230,255,.16),0 0 18px rgba(0,212,255,.16)}
.mode-btn.active span{color:#ffd166;opacity:1}
.mode-btn:focus-visible{outline:2px solid #ffd166;outline-offset:2px}
.activity-intro-card.is-live{border-color:rgba(255,209,102,.82);background:rgba(78,35,8,.78);box-shadow:0 0 22px rgba(255,107,53,.22)}
.activity-intro-card.is-live .activity-intro-title{color:#ffe29a}
@media(max-width:760px){.mode-buttons{grid-template-columns:1fr}.mode-btn{min-height:44px}.mode-btn span{display:inline-block;margin:0 7px 0 0}}