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@media(max-width:700px){:root{font-size:16px}.wrap{width:calc(100% - 36px)}.head-inner{min-height:76px;gap:10px}.brand{font-size:1.12rem;gap:8px}.brand img{width:40px;height:40px}.brand small{font-size:.65rem}.head-link{font-size:.86rem}.hero{padding:16px 0 34px}.hero-grid{grid-template-columns:1fr;gap:28px}.crumb{margin-bottom:15px;font-size:.75rem;gap:6px}.hero-visual{padding:22px;box-shadow:6px 6px 0 #e0e9f6}.route{grid-template-columns:1fr auto 1fr auto 1.3fr;gap:5px;align-items:center;font-size:.8rem}.route b{transform:rotate(-90deg)}.route span{padding:10px 4px}.hero-visual>p:not(.figure-tag){font-size:.9rem}.hero-visual br{display:none}.hero .answer{font-size:1rem}.hero .primary{width:100%}.safety{padding:18px;margin-top:24px}.contents{gap:3px 14px;font-size:.88rem}.section{padding-top:42px}.tool{padding:18px}.check-grid{grid-template-columns:1fr 1fr;gap:8px}.check-grid label{padding:8px;font-size:.9rem}.form-grid{grid-template-columns:1fr;gap:16px}.tool .primary{width:100%}.result{padding:18px}.four-cards{gap:12px;grid-template-columns:1fr}.four-cards article{padding:20px}.number{float:left;margin:2px 12px 0 0}.segmented{padding:10px;gap:5px}.segmented button{font-size:.84rem;min-height:48px}.building{padding:4px}.layer-note{padding:18px}.diagram-card>.caption{padding:0 18px 18px}.terms{grid-template-columns:1fr;gap:22px}.story-player{padding:18px}.story-stage{grid-template-columns:70px 1fr;gap:20px;min-height:270px}.story-track{width:55px;border-width:9px;height:220px}.story-track span{font-size:.62rem;padding:2px 4px}.story-stage h3{font-size:1rem}#story-caption{font-size:.96rem}.story-controls{gap:8px}.story-controls button{padding:8px 11px}.slope-tool{grid-template-columns:1fr;padding:20px;gap:20px}.decision-list article{grid-template-columns:1fr;gap:9px}.checklist{padding:22px;margin-top:38px}.related>a{display:block}.related span{display:block;margin-top:6px}.footer{margin-top:40px;padding:25px 0}.footer>span{flex-basis:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{.site-head,.contents,.tool,.story-player,.primary,.footer{display:none}.wrap{width:100%;max-width:none}.section{padding-top:20px}.hero-grid{display:block}.hero-visual{display:none}.checklist{background:white;color:#000;border:2px solid #193e82;break-inside:avoid}.checklist h2,.checklist .eyebrow{color:#193e82}.checklist a{color:#000}.building .wall{display:none}.building .pipe-layer,.building .pipe-label{opacity:1!important}}

/* Q822：各鏡實體圖面與資料同步。 */
.r4-film{display:block;width:100%;height:auto;max-width:100%;font-family:system-ui,'Microsoft JhengHei',sans-serif}.r4-film [data-r4-scene]{display:none}.r4-film [data-r4-scene].r4-current{display:block}.r4-film text{font-weight:600}.r4-film .r4-flow{stroke-dasharray:9 7}.r4-film[hidden]{display:none!important}

.story-stage{grid-template-columns:1fr}.story-stage .r4-film{max-height:390px}