@charset "UTF-8";
@font-face{font-family:LocalSans;src:local('Microsoft YaHei');font-display:swap}
:root{--ink:#27232d;--muted:#716b78;--paper:#f8f6f3;--white:#fff;--line:#e8e2eb;--accent:#742b73;--tint:#f1eaf3;--coral:#e86049;--gold:#dea332;--radius:24px;--shadow:0 12px 40px #30233706}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:82px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,'Segoe UI',LocalSans,sans-serif;font-size:15px;line-height:1.65}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #b899c0;outline-offset:4px}img{display:block;max-width:100%}::selection{background:#e5d2ea}.skip{position:fixed;top:-100px;left:20px;z-index:100}.skip:focus{top:12px;background:#fff;padding:12px}
.sidebar{position:fixed;width:254px;inset:0 auto 0 0;border-right:1px solid var(--line);background:#fffdfb;display:flex;flex-direction:column;z-index:40;padding:32px 19px 18px}.brand{display:flex;gap:12px;align-items:center;padding:0 6px 26px}.brand-mark{display:block;height:48px;width:48px;flex:none;object-fit:contain}.brand-copy{font-size:15px;line-height:1.5;letter-spacing:.015em;font-weight:600}.brand-copy>span{display:block;font-size:14px;font-weight:500}.mobile-brand{display:none}.search{display:flex;align-items:center;background:var(--paper);padding:10px;border:1px solid var(--line);border-radius:13px;gap:8px}.search svg{width:17px;stroke:var(--muted);fill:none;stroke-width:1.6;flex-shrink:0}.search input{width:100%;min-width:0;border:0;outline:0;background:transparent;font-size:12px;color:var(--ink)}.search kbd{font-size:11px;color:#8b8390;border:1px solid var(--line);padding:0 4px;border-radius:4px}.filters{display:flex;flex-wrap:wrap;gap:3px;margin:13px 0 20px}.filter{background:transparent;border:0;padding:5px 9px;font-size:11px;color:var(--muted);border-radius:8px;transition:.2s}.filter.active{background:var(--tint);color:var(--accent)}#equipment-list{overflow:auto;flex:1;scrollbar-width:thin;scrollbar-color:#e8e2ec transparent}.equipment-item{display:flex;align-items:center;gap:12px;text-align:left;width:100%;padding:10px 9px;margin:3px 0;border:1px solid transparent;border-radius:14px;background:transparent;transition:background .2s,border .2s}.equipment-item:hover{background:#f5f0f7}.equipment-item.active{background:var(--tint);border-color:#d7bfdf}.equipment-thumb{width:45px;height:62px;border-radius:8px;object-fit:contain;flex-shrink:0;background:#f1eff3;padding:3px}.item-name{font-size:12px;line-height:1.5;font-weight:550;display:block}.item-meta{display:block;color:var(--muted);font-size:10px;margin-top:3px}.no-results{font-size:12px;color:var(--muted);padding:30px 10px}
main{margin-left:254px;padding:0 42px 34px;max-width:1780px}.topbar{height:80px;display:flex;align-items:center;justify-content:flex-end;gap:20px}.quiet-button{font-size:12px;background:none;border:0;padding:8px 0;color:var(--muted)}.quiet-button span{margin-left:10px}.mobile-catalog{display:none}.equipment-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:12px 0 25px}.equipment-heading h1{margin:0;font-size:clamp(27px,3vw,43px);font-weight:600;line-height:1.25;letter-spacing:-.035em}.equipment-kind{font-size:12px;color:var(--muted);padding-bottom:5px}.mode-row{margin-bottom:26px}.mode-label{font-size:11px;color:var(--muted);display:block;margin-bottom:9px}.mode-tabs{display:flex;flex-wrap:wrap;gap:8px}.mode-tab{padding:10px 17px;border:1px solid #e6dfe9;border-radius:12px;background:#ffffff99;font-size:12px;transition:background .2s,box-shadow .2s,transform .2s}.mode-tab:hover{transform:translateY(-2px)}.mode-tab[aria-selected=true]{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 5px 13px #742b7314}.mode-panel{animation:enter .28s ease both}@keyframes enter{from{opacity:.2;transform:translateY(5px)}to{opacity:1;transform:none}}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);gap:20px;margin-bottom:28px;align-items:stretch}.hero-machine{border-radius:var(--radius);background:linear-gradient(140deg,#ece7f0,#f6f3f7 70%);position:relative;min-height:520px;overflow:hidden;padding:24px}.hero-machine::after{content:'';position:absolute;bottom:36px;width:64%;left:18%;height:15px;background:#66596d12;filter:blur(11px);border-radius:50%;pointer-events:none}.hero-machine .figure-button,.hero-machine .figure-wrap{height:100%;background:transparent}.hero-machine .figure-button{position:absolute;inset:24px;width:calc(100% - 48px);height:calc(100% - 48px);z-index:1}.muscle-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:25px}.muscle-copy h2{font-size:24px;line-height:1.45;letter-spacing:-.03em;margin:0 0 7px;font-weight:550}.mode-grip{font-size:12px;color:var(--muted);line-height:1.8;margin-bottom:13px}.muscle-line{font-size:12px;margin:7px 0;display:flex;gap:8px;align-items:flex-start;line-height:1.6}.color-dot{height:8px;width:8px;margin-top:5px;flex-shrink:0;border-radius:50%;background:var(--coral)}.color-dot.secondary{background:var(--gold)}.muscle-line .role{color:var(--muted);min-width:25px}.muscle-line b{font-weight:500}.anatomy-button{display:block;width:100%;padding:0;margin-top:18px;border:0;background:transparent;cursor:zoom-in;border-radius:12px}.anatomy-image{width:100%;height:auto;max-height:480px;object-fit:contain}
.quick-nav{display:flex;align-items:center;position:sticky;top:0;z-index:20;background:#f8f6f3ed;backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:14px 0;margin-bottom:31px}.quick-links{display:flex;gap:27px}.quick-links a{font-size:12px;color:var(--muted);padding:4px 0;position:relative}.quick-links a::after{content:'';position:absolute;width:0;bottom:0;height:1px;background:var(--accent);left:0;transition:width .2s}.quick-links a:hover::after{width:100%}.quick-links b{font-size:10px;font-weight:400;opacity:.6;margin-right:7px}.section{margin-bottom:38px;scroll-margin-top:74px}.section-head{display:flex;gap:13px;align-items:baseline;justify-content:space-between;margin-bottom:18px}.section-head h2{font-size:24px;letter-spacing:-.03em;font-weight:550;margin:0}.section-head h2 span{color:#8d8096;font-size:12px;margin-right:10px;font-weight:400}
.setup-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.setup-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.setup-grid.five{grid-template-columns:repeat(6,minmax(0,1fr))}.setup-grid.five>.lesson-card{grid-column:span 2}.setup-grid.five>.lesson-card:nth-child(n+4){grid-column:span 3}.lesson-card{background:var(--white);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;min-width:0}.figure-button{width:100%;padding:0;border:0;display:block;position:relative;overflow:hidden;background:#f2eff4;cursor:zoom-in;flex-shrink:0}.figure-wrap{position:relative;width:100%;overflow:hidden;height:260px}.figure-surface{position:relative;width:100%;height:100%}.figure-wrap img{display:block;position:absolute;object-fit:contain;transform:none}.figure-button::after{content:'↗';position:absolute;right:10px;top:10px;color:#706079;background:#ffffffe0;border-radius:6px;padding:0 6px;font-size:12px;opacity:0;transition:opacity .2s;z-index:2}.figure-button:hover::after{opacity:1}.figure-wrap .annotation{position:absolute;pointer-events:none}.annotation line{stroke:#fff;stroke-width:1.2;filter:drop-shadow(0 1px 2px #0006)}.annotation circle{fill:var(--coral);stroke:#fff;stroke-width:1}.annotation rect{fill:#fffffff5}.annotation text{fill:#302a36;font-weight:500}.lesson-copy{padding:18px 20px 21px;display:flex;flex-direction:column;flex:1}.lesson-copy h3{font-size:15px;font-weight:600;margin:0 0 9px}.lesson-copy p{font-size:13px;color:#665e6d;margin:0;line-height:1.85}.source-link{align-self:flex-start;display:inline-flex;gap:5px;align-items:center;font-size:10px;color:#756b7e;border-bottom:1px solid #e1d9e6;margin-top:13px;line-height:1.5;transition:color .2s}.source-link:hover{color:var(--accent)}
.position-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.position-card .figure-wrap{height:300px}.position-card .lesson-copy h3::before{content:'✓';margin-right:8px;color:#81588c;font-size:12px}.motion-box{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(270px,1fr);border:1px solid var(--line);background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.motion-visual{background:#f0ecf3;padding:16px;display:flex;flex-direction:column;min-width:0}.motion-visual .figure-wrap{height:420px;border-radius:13px}.phase-gallery{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;padding:12px 0 0}.phase-preview{min-width:0;border:1px solid #ded3e4;background:#fcfafc;border-radius:10px;padding:7px;text-align:left;transition:border .2s,background .2s}.phase-preview[aria-selected=true]{border-color:#976aa3;background:#e8dbee}.phase-mini{display:block;width:100%;height:72px}.motion-visual .phase-mini .figure-button,.motion-visual .phase-mini .figure-wrap{height:100%;background:transparent;cursor:pointer}.phase-mini .figure-button::after{display:none}.phase-preview>span:last-child{display:block;color:#6c6075;font-size:10px;padding:6px 2px 0;line-height:1.6}.motion-copy{padding:28px 25px 23px;display:flex;flex-direction:column}.phase-selector{display:flex;flex-direction:column;gap:5px}.phase-button{border:0;background:transparent;border-radius:11px;text-align:left;display:flex;align-items:flex-start;gap:13px;padding:12px 9px;transition:background .2s}.phase-button .step-num{font-size:11px;color:#9887a1;line-height:27px}.phase-button h3{font-size:15px;font-weight:500;margin:0;line-height:27px}.phase-button[aria-selected=true]{background:#f0e7f4}.phase-button[aria-selected=true] .step-num{color:var(--accent)}.phase-button[aria-selected=true] h3{font-weight:600}.phase-detail{font-size:13px;line-height:1.9;color:#665e6d;margin-top:19px;min-height:92px}.motion-bottom{margin-top:auto;padding-top:15px;display:flex;align-items:end;justify-content:space-between;gap:15px}.phase-controls{display:flex;gap:7px}.phase-controls button{height:31px;width:31px;border-radius:9px;border:1px solid var(--line);background:#fff;font-size:15px}.phase-controls button:disabled{color:#c6becc;cursor:default}
.error-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.error-card .figure-wrap{height:290px}.error-card h3{color:#834b47}.error-card .lesson-copy{padding:19px 21px 22px}.comparison-figure{display:grid;grid-template-columns:1fr 1fr;background:#f2eff4;min-height:290px;flex-shrink:0}.comparison-panel{position:relative;min-width:0}.comparison-panel:first-child{border-right:1px solid #fff}.comparison-role{position:absolute;top:10px;left:10px;z-index:3;padding:3px 9px;background:#f0e7f4;font-size:12px;font-weight:600;color:#744b82;border-radius:6px}.incorrect .comparison-role{color:#b65547;background:#f9ece8}.comparison-panel .figure-wrap{height:290px}
dialog{padding:40px 24px 22px;border:0;background:#faf8fb;border-radius:24px;box-shadow:0 30px 100px #24182f45;width:min(1180px,94vw);max-height:94vh;overflow:auto;color:var(--ink)}dialog::backdrop{background:#24152fa6;backdrop-filter:blur(9px)}.dialog-close{position:absolute;top:9px;right:14px;border:0;background:transparent;font-size:28px;font-weight:200;z-index:4;color:#756c7d}.dialog-close:hover{color:#422e4c}#dialog-image .figure-wrap{height:min(72vh,780px);background:transparent}#dialog-caption{margin:17px auto 0;max-width:840px;font-size:13px;color:var(--muted)}.gallery-head{padding:0 10px 22px}.gallery-head h2{margin:5px 0;font-size:24px;font-weight:550}.eyebrow{font-size:11px;color:var(--muted);letter-spacing:.14em}#gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}#gallery-grid .figure-wrap{height:290px}#gallery-grid p{font-size:12px;padding:12px;margin:0;color:var(--muted)}
@media(min-width:1700px){main{padding-right:65px;padding-left:65px}.hero-machine{min-height:580px}.anatomy-image{max-height:520px}.figure-wrap{height:285px}.motion-visual .figure-wrap{height:490px}.error-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:1250px){main{padding-left:26px;padding-right:26px;margin-left:224px}.sidebar{width:224px}.muscle-card{padding:21px 18px}.muscle-copy h2{font-size:21px}.hero-machine{min-height:470px}.setup-grid,.setup-grid.five{grid-template-columns:repeat(2,minmax(0,1fr))}.setup-grid.five>.lesson-card,.setup-grid.five>.lesson-card:nth-child(n+4){grid-column:span 1}.setup-grid.five>.lesson-card:last-child{grid-column:1/-1}.position-card .figure-wrap{height:280px}.motion-copy{padding:24px 19px}.motion-visual .figure-wrap{height:385px}.quick-links{gap:22px}.error-card .figure-wrap{height:255px}}
@media(max-width:900px){.sidebar{width:200px;padding:25px 13px 16px}.brand{padding:0 3px 22px;gap:9px}.brand-mark{width:42px;height:42px}.brand-copy{font-size:13px}.brand-copy>span{font-size:12px}.equipment-item{gap:8px;padding:8px 5px}.item-name{font-size:11px}.item-meta{font-size:9px}.equipment-thumb{width:37px;height:51px}main{margin-left:200px;padding:0 20px 25px}.hero-grid{gap:13px;grid-template-columns:.9fr 1.1fr}.hero-machine{min-height:440px;padding:16px}.hero-machine .figure-button{inset:16px;width:calc(100% - 32px);height:calc(100% - 32px)}.muscle-card{padding:18px}.muscle-copy h2{font-size:20px}.muscle-line{font-size:11px;gap:6px}.mode-grip{font-size:11px}.motion-box{grid-template-columns:1fr}.motion-copy{padding:20px 22px}.phase-selector{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px}.phase-button{padding:9px;gap:8px}.phase-button h3{font-size:13px;line-height:24px}.phase-button .step-num{line-height:24px;font-size:10px}.phase-detail{min-height:0;margin:15px 0 5px}.quick-links{gap:20px}.section-head h2{font-size:22px}.equipment-kind{display:none}.position-grid{grid-template-columns:1fr}.position-card{display:grid;grid-template-columns:1.2fr 1fr}.position-card .lesson-copy{justify-content:center}.error-grid{grid-template-columns:1fr}.error-card{display:grid;grid-template-columns:1.4fr 1fr}.error-card .lesson-copy{justify-content:center}.error-card .figure-wrap{height:270px}}
@media(max-width:650px){.sidebar{display:none;top:76px;width:100%;height:calc(100dvh - 76px);padding:20px;background:#faf8fc;border:0}.sidebar.open{display:flex}.sidebar .brand{display:none}.side-tools{max-width:500px;width:100%;margin:auto}#equipment-list{display:grid;grid-template-columns:1fr 1fr;align-content:start;gap:7px}.equipment-item{background:#fff;border:1px solid var(--line);padding:12px;min-height:82px}.equipment-thumb{width:39px;height:57px}main{margin-left:0;padding:0 17px 24px}.topbar{height:76px;justify-content:space-between;gap:10px}.mobile-brand{display:flex;align-items:center;gap:8px;flex-shrink:0;white-space:nowrap}.mobile-brand .brand-mark{height:32px;width:32px}.mobile-brand .brand-copy{font-size:11.5px;line-height:1.45}.mobile-brand .brand-copy>span{font-size:10.5px}.mobile-catalog{display:block;border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 11px;font-size:11px}.mobile-catalog span{margin-left:7px}.quiet-button{font-size:11px;flex-shrink:0;white-space:nowrap}.mobile-catalog{flex-shrink:0;white-space:nowrap}.equipment-heading{margin:10px 0 20px}.equipment-heading h1{font-size:29px}.mode-tabs{gap:7px}.mode-tab{padding:9px 12px;font-size:12px;border-radius:10px}.mode-row{margin-bottom:18px}.hero-grid{grid-template-columns:1fr;gap:13px;margin-bottom:19px}.hero-machine{height:310px;min-height:0}.muscle-card{padding:21px}.muscle-copy h2{font-size:23px}.mode-grip,.muscle-line{font-size:12px}.anatomy-image{max-height:none}.quick-nav{padding:12px 0;margin-bottom:25px}.quick-links{width:100%;justify-content:space-between;gap:6px}.quick-links a{font-size:11px}.quick-links b{margin-right:4px;font-size:9px}.section{margin-bottom:30px}.section-head h2{font-size:23px}.setup-grid,.setup-grid.four,.setup-grid.five{grid-template-columns:1fr;gap:14px}.setup-grid.five>.lesson-card:last-child{grid-column:auto}.setup-grid .figure-wrap{height:280px}.lesson-copy{padding:18px 20px}.lesson-copy h3{font-size:14px}.lesson-copy p{font-size:12.5px;line-height:1.85}.source-link{font-size:10px}.position-grid{gap:14px}.position-card{display:flex}.position-card .figure-wrap{height:315px}.motion-visual{padding:11px}.motion-visual .figure-wrap{height:330px}.motion-copy{padding:18px}.phase-gallery{gap:6px}.phase-preview{padding:5px}.phase-mini{height:59px}.phase-preview>span:last-child{font-size:9px;padding-top:4px}.phase-button h3{font-size:13px}.phase-detail{font-size:12.5px}.error-grid{gap:14px}.error-card{display:flex}.error-card .figure-wrap{height:245px}.error-card .lesson-copy{padding:18px 20px}.comparison-figure,.comparison-panel .figure-wrap{min-height:245px;height:245px}.comparison-role{font-size:10px;padding:3px 6px;left:6px;top:6px}#gallery-grid{grid-template-columns:1fr 1fr}#gallery-grid .figure-wrap{height:235px}dialog{border-radius:18px;padding:36px 13px 16px}#dialog-image .figure-wrap{height:68vh}#dialog-caption{font-size:12px}}
@media(max-width:360px){.topbar{gap:6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.mode-panel{animation:none}*,*::before,*::after{transition:none!important}}

.finish-guide{margin-top:20px}.finish-heading{margin:0 0 12px;font-size:17px;font-weight:550}.finish-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.finish-grid>.lesson-card:only-child{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.finish-card .figure-wrap{height:280px}.finish-card .lesson-copy{justify-content:center}@media(max-width:650px){.finish-grid{grid-template-columns:1fr}.finish-grid>.lesson-card:only-child{display:flex}.finish-card .figure-wrap{height:300px}}

/* Models load only after the user chooses the 3D view. */
.hero-machine{position:relative}.model-preview-link{position:absolute;right:18px;bottom:18px;z-index:4;display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:10px 17px;border:1px solid #d3bbdb;border-radius:12px;background:#fffefdf0;color:#693171;text-decoration:none;font-size:14px;box-shadow:0 5px 18px #48224b0c;backdrop-filter:blur(8px)}.model-preview-link svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linejoin:round}.model-preview-link:hover{background:#f4ebf6;border-color:#aa78b5}.model-preview-link:focus-visible{outline:2px solid #8f4e98;outline-offset:3px}