:root{--blue:#193e82;--orange:#d97827;--ink:#182b47;--muted:#516078;--line:#d9e2ec;--paper:#fff;--wash:#f3f6fa;--pale:#fff3e8;--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;color:var(--ink);background:var(--paper);font:17px/1.8 system-ui,-apple-system,"Noto Sans TC","Microsoft JhengHei",sans-serif}button,input,select,textarea{font:inherit}a{color:var(--blue);text-underline-offset:5px}button,a,select,input{touch-action:manipulation}button,select,.button{min-height:46px}button{cursor:pointer;background:#fff;border:1px solid #aab9cc;border-radius:9px;color:var(--blue);padding:9px 15px;font-weight:650}button:hover{background:#edf3fb}button[aria-pressed=true],.primary{color:#fff;background:var(--blue);border-color:var(--blue)}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:4px}a.button{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;border-radius:9px;text-decoration:none;background:var(--blue);color:white;font-weight:750}h1,h2,h3,p,figure{margin:0}h1{font-size:clamp(31px,4.2vw,52px);line-height:1.3;letter-spacing:-.03em;color:var(--blue);margin:15px 0 22px}h2{font-size:clamp(26px,3vw,35px);line-height:1.4;color:var(--blue);margin-bottom:20px}h3{font-size:21px;line-height:1.5;margin-bottom:10px}p+p{margin-top:13px}.wrap{width:min(1140px,calc(100% - 48px));margin:auto}.header{border-bottom:1px solid var(--line);background:white}.header .wrap{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:91px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:22px;font-weight:800}.brand img{width:55px;height:55px;object-fit:contain}.header nav a{display:inline-flex;align-items:center;min-height:44px;font-size:15px}.skip{position:absolute;left:16px;top:-100px;background:white;z-index:20}.skip:focus{top:10px}.hero{background:linear-gradient(115deg,#f0f5fc 0%,#f8fafc 65%,#fff4e7 100%);padding:50px 0 46px}.crumb{font-size:14px;margin-bottom:28px}.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:45px;align-items:center}.eyebrow{color:var(--blue);font-weight:800;letter-spacing:.1em;font-size:13px}.eyebrow:before{content:"";display:inline-block;width:23px;height:4px;background:var(--orange);vertical-align:middle;margin-right:10px}.lead{font-size:19px;line-height:1.9}.hero .button{margin-top:24px}.hero-art{position:relative;background:white;border:1px solid #d5dfeb;border-radius:24px;padding:28px 22px 18px;box-shadow:0 18px 46px #193e8210}.hero-art figcaption{font-size:14px;color:var(--muted);padding-top:13px;border-top:1px solid var(--line)}.hero-art svg{width:100%;height:auto;display:block}.mini-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:13px}.mini-tags span,.tag{display:inline-block;color:var(--blue);border:1px solid #cfdaeb;background:#f0f5fc;border-radius:30px;font-size:13px;padding:3px 12px}.section{padding:54px 0;border-bottom:1px solid var(--line)}.intro{max-width:820px;color:var(--muted);margin-bottom:24px}.two{display:grid;grid-template-columns:1fr 1fr;gap:24px}.panel{border:1px solid var(--line);border-radius:var(--radius);padding:25px;background:#fff}.panel.tinted{background:var(--wash)}.note{padding:17px 20px;background:var(--pale);border-left:4px solid var(--orange);margin:20px 0;border-radius:0 10px 10px 0}.note strong{color:#713b12}.fine{font-size:14px;color:var(--muted)}label{display:block;font-weight:650}select,textarea{width:100%;background:#fff;border:1px solid #9baec5;border-radius:8px;color:var(--ink);padding:11px 12px;margin:5px 0 17px}fieldset{border:0;padding:0;margin:0}legend{font-weight:750;margin-bottom:12px}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.result{background:#eff4fb;border:1px solid #c5d6ef;border-radius:16px;padding:25px;margin-top:22px}.result[data-state=urgent]{background:#fff3e8;border-color:#d97827}.result h3{color:var(--blue)}.result ul{padding-left:22px}.controls{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.diagram-shell{border:1px solid var(--line);border-radius:18px;background:#f8fafc;padding:24px}.diagram-shell svg{width:100%;height:auto;display:block}.diagram-shell [data-diagram]{display:none}.diagram-shell[data-kind=ceramic] [data-diagram=ceramic],.diagram-shell[data-kind=washer] [data-diagram=washer]{display:block}.diagram-shell [data-detail]{display:none}.diagram-shell[data-layer="1"] [data-detail="1"],.diagram-shell[data-layer="2"] [data-detail="1"],.diagram-shell[data-layer="3"] [data-detail="1"],.diagram-shell[data-layer="2"] [data-detail="2"],.diagram-shell[data-layer="3"] [data-detail="2"],.diagram-shell[data-layer="3"] [data-detail="3"]{display:block}.diagram-shell:not([data-layer="0"]) .outer-cover{opacity:.17}.diagram-shell[data-layer="2"] .cartridge,.diagram-shell[data-layer="3"] .cartridge{transform:none}.layer-copy{border-left:4px solid var(--orange);padding-left:19px;margin-top:22px;min-height:118px}.layer-copy h3{font-size:20px}.diagram-shell svg text{font-family:"Microsoft JhengHei",system-ui,sans-serif}.compare-table{border-collapse:collapse;width:100%;font-size:16px}.compare-table th,.compare-table td{padding:17px;border:1px solid var(--line);text-align:left;vertical-align:top}.compare-table thead{background:var(--blue);color:#fff}.compare-table td:first-child{font-weight:700;background:#f4f7fb}.check-options label,.checklist label{display:flex;align-items:flex-start;gap:12px;min-height:48px;padding:10px 0;font-weight:500}.check-options input,.checklist input{width:22px;height:22px;flex:0 0 22px;margin-top:4px;accent-color:var(--blue)}.sort-list{list-style:none;padding:0;counter-reset:item;display:grid;gap:12px}.sort-list li{counter-increment:item;display:flex;align-items:center;gap:13px;border:1px solid #c7d4e4;background:#fff;border-radius:12px;padding:14px}.sort-list li:before{content:counter(item,decimal-leading-zero);color:var(--blue);font-size:23px;font-weight:800}.sort-list li.dragging{opacity:.5}.sort-label{flex:1}.sort-label strong{display:block}.sort-label small{display:block;font-size:14px;color:var(--muted)}.sort-buttons{display:flex;gap:6px}.sort-buttons button{min-width:44px;padding:8px}.lab-result{font-size:38px;font-weight:800;color:var(--blue);line-height:1.3;margin:16px 0}.lab-result small{font-size:16px}.range-row{margin:17px 0}input[type=range]{width:100%;height:44px;accent-color:var(--blue)}.quiz{margin-top:24px;background:var(--wash);padding:22px;border-radius:14px}.quiz button{display:block;text-align:left;margin-top:10px;width:100%;font-weight:500}.player{border:1px solid #bdcde2;border-radius:20px;overflow:hidden}.stage{padding:30px;min-height:250px;background:var(--blue);color:#fff;display:grid;grid-template-columns:120px 1fr;gap:25px;align-items:center}.stage-icon{width:108px;height:108px;border:1px solid #9fb9e1;border-radius:50%;display:grid;place-items:center;font-size:42px;font-weight:750}.stage h3{color:white;font-size:27px}.stage p{color:#e4efff;margin-top:10px;font-size:17px}.stage .moving{animation:pulse 2s ease-in-out infinite}.player:not([data-playing=true]) .moving{animation-play-state:paused}@keyframes pulse{50%{transform:translateY(-7px)}}.subtitle{background:#e9f0fa;min-height:70px;text-align:center;padding:18px 15px;font-size:18px;font-weight:650}.subtitle.off{visibility:hidden}.player-bottom{padding:20px}.progress{height:6px;background:#dbe5f3}.progress span{display:block;height:100%;width:0;background:var(--orange)}.player-controls{display:flex;flex-wrap:wrap;gap:9px;align-items:center}.player-controls select{width:100px;margin:0}.shots{display:flex;gap:9px;flex-wrap:wrap;margin:17px 0}.shots button[aria-current=step]{background:var(--blue);color:white}.transcript li{margin:20px 0}.transcript p{margin-top:6px}.cta{margin-top:30px;padding:28px;background:var(--blue);color:white;border-radius:18px;display:flex;justify-content:space-between;align-items:center;gap:25px}.cta h3{color:#fff}.cta .button{background:white;color:var(--blue);white-space:nowrap}.cta .phone{display:inline-flex;min-height:44px;align-items:center;color:white}.related{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:20px}.related a{border:1px solid var(--line);border-radius:10px;padding:13px 17px;display:flex;align-items:center;min-height:52px}.footer{background:var(--wash);padding:30px 0;font-size:14px}.footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px}.footer a{display:inline-flex;min-height:44px;align-items:center}details{border-bottom:1px solid var(--line);padding:17px 0}summary{cursor:pointer;min-height:44px;font-weight:650;color:var(--blue);padding:8px 0}details p{padding:12px 0}textarea{resize:vertical;min-height:205px;font-weight:400}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.no-js{background:var(--pale);padding:20px}.static-routes{margin:20px 0}.static-routes li{margin:10px 0}.print-only{display:none}@media(max-width:760px){.wrap{width:calc(100% - 36px)}.hero{padding:28px 0 33px}.hero-grid,.two,.field-grid{grid-template-columns:1fr;gap:20px}.hero-grid{gap:30px}.section{padding:36px 0}.header .wrap{min-height:78px}.brand{font-size:19px;gap:9px}.brand img{width:44px;height:44px}.hero-art{padding:22px 15px 15px}.panel,.diagram-shell{padding:18px}.diagram-shell svg{min-height:215px}.compare-table{font-size:14px}.compare-table th,.compare-table td{padding:10px 8px}.sort-list li{flex-wrap:wrap;padding:12px;gap:10px}.sort-label{min-width:190px}.sort-buttons{margin-left:auto}.related{grid-template-columns:1fr}.cta{align-items:stretch;flex-direction:column;padding:23px}.stage{grid-template-columns:1fr;gap:12px;padding:24px;min-height:300px}.stage-icon{width:62px;height:62px;font-size:28px}.stage h3{font-size:23px}.player-bottom{padding:15px}.layer-copy{min-height:180px}.lead{font-size:18px}.crumb{margin-bottom:20px}.header nav a{font-size:14px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}@media print{.header,.hero,.section:not(#checklist),.footer,.cta,button,.controls{display:none!important}.wrap{width:100%}.section{border:0;padding:0}.two{display:block}.panel{break-inside:avoid;margin-bottom:15px}.print-only{display:block}.print-only p{font-size:14px}textarea{border:1px solid #999;height:230px}.checklist input{appearance:none;border:1px solid #333}.checklist input:checked:after{content:"✓"}body{font-size:12pt}}

.movie-graphic{width:100%;height:auto;display:block;background:#193e82;padding:0 20px 20px}.movie-graphic [data-scene]{display:none}.player[data-scene="0"] [data-scene="0"]{display:block}.player[data-scene="1"] [data-scene="1"]{display:block}.player[data-scene="2"] [data-scene="2"]{display:block}.player[data-scene="3"] [data-scene="3"]{display:block}.player[data-scene="4"] [data-scene="4"]{display:block}.player[data-scene="5"] [data-scene="5"]{display:block}
.player[data-playing=true] .falling{animation:fall 1.8s infinite}.player[data-playing=true] .disc{animation:disc 4s ease-in-out infinite;transform-origin:180px 95px}.player[data-playing=true] .pressing{animation:press 4s ease-in-out infinite}.player[data-playing=true] .valve{animation:valve 4s ease-in-out infinite;transform-origin:105px 78px}@keyframes fall{0%{transform:translateY(-8px);opacity:0}40%{opacity:1}100%{transform:translateY(17px);opacity:0}}@keyframes disc{50%,100%{transform:rotate(90deg)}}@keyframes press{50%,100%{transform:translateY(23px)}}@keyframes valve{50%,100%{transform:rotate(90deg)}}

.diagram-shell[data-layer="0"] [data-diagram="washer"] > :not(.washer-overview){display:none}.diagram-shell:not([data-layer="0"]) .washer-overview{display:none}dialog{width:min(950px,95vw);max-height:90vh;border:1px solid #b2c4da;border-radius:16px;padding:24px;color:#182b47}dialog::backdrop{background:#12233ac4}.zoom-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.zoom-head h2{margin:0;font-size:25px}#zoom-canvas{overflow:auto;max-height:58vh;margin:12px 0 20px;overscroll-behavior:contain}#zoom-canvas .diagram-shell{max-width:none}#zoom-canvas:focus-visible{outline:3px solid #d97827}@media(max-width:760px){dialog{padding:16px}.zoom-head h2{font-size:22px}}

/* Q822：機構與字幕共用 elapsed，暫停與速度不另起 CSS 計時。 */
.player .disc,.player .pressing,.player .valve,.player .falling{animation:none!important}.player .disc{transform-origin:180px 95px}.player .valve{transform-origin:105px 78px}

.diagram-shell svg[data-washer-state="closed"] .stem-assembly{transform:translateY(8px)}

/* 從 inline SVG 移出，僅約束主圖與既有放大容器。 */
.diagram-shell svg [data-diagram="washer"],.diagram-shell svg [data-detail],.diagram-shell svg .washer-closed-flow{display:none}.diagram-shell svg[data-washer-state="closed"] .stem-assembly{transform:translateY(8px)}.diagram-shell svg[data-washer-state="closed"] .washer-open-flow{display:none}.diagram-shell svg[data-washer-state="closed"] .washer-closed-flow{display:block}

:is(button,a,input,select,textarea,summary):focus-visible,#zoom-canvas:focus-visible{outline:3px solid #193e82;outline-offset:4px;box-shadow:0 0 0 3px white}

/* Q855：限本頁播放器與圖解；不改共用資產。 */
.q855-player button,.q855-player select{min-height:44px;min-width:44px}
.q855-player button{border:2px solid #193e82;background:#fff;color:#193e82;opacity:1}
.q855-player button.primary{background:#d97827;color:#12233a;border-color:#193e82}
.q855-player button[aria-current="step"],.q855-player button[aria-pressed="true"]:not(.primary){background:#193e82;color:#fff}
.q855-player button:disabled{background:#e2e8f0;color:#334155;border-color:#526782;opacity:1;cursor:default}
.q855-player select{border:2px solid #193e82;color:#193e82;background:white}
.q855-player :is(button,select,input):focus-visible{outline:3px solid #193e82;outline-offset:4px;box-shadow:0 0 0 3px white}
.q855-player #subtitle,.q855-player #story-caption{box-sizing:border-box;min-height:calc(3.2em + 28px);line-height:1.6;font-size:18px;padding:14px 12px;background:#193e82;color:#fff;white-space:normal;overflow-wrap:anywhere}
.q855-caption-off{visibility:hidden}
#q855-status{font-size:16px;color:#193e82;background:white;padding:12px;border-radius:8px;min-height:3em;line-height:1.6}
#q855-status[data-error="true"]{border:2px solid #193e82;background:#fff3e8;color:#193e82}
.q855-player #progress-fill{background:#193e82}
.q855-player .progress{background:#dbe5f3}
.q855-player input[type=range]{accent-color:#193e82}
.q855-reduced *, .q855-reduced *::before,.q855-reduced *::after{animation:none!important;transition:none!important}
@media(prefers-reduced-motion:reduce){.q855-player *{animation:none!important;transition:none!important}}