*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:#30343a;background:#fff;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:1.48}a{color:inherit;text-decoration:none}button{font:inherit}.shell{width:min(1120px,calc(100% - 36px));margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:8px;left:8px;z-index:1000;background:#fff;padding:8px 12px;transform:translateY(-160%)}.skip-link:focus{transform:none}.utility-bar{height:29px;background:#f4f5f6;border-top:2px solid #d8e4ed;color:#737980;font-size:12px}.utility-inner{height:27px;display:flex;align-items:center;justify-content:space-between}.utility-contact,.utility-links{display:flex;align-items:center;gap:7px}.utility-contact svg{width:13px;height:13px;fill:#747b82}.site-header{border-bottom:1px solid #e7e7e7;background:#fff}.header-inner{height:76px;display:flex;align-items:center;gap:30px}.brand{font-weight:700;font-size:22px;letter-spacing:-1.6px;color:#4f74ff}.brand span{color:#3669ff}.main-nav{display:flex;align-items:center;gap:34px;font-weight:700;color:#111}.main-nav a:hover{color:#3669ff}.menu-button{display:none;margin-left:auto;border:0;background:none;padding:8px}.menu-button i{display:block;width:23px;height:2px;background:#222;margin:5px}.breadcrumb{height:62px;display:flex;align-items:center;gap:10px;color:#74808c}.breadcrumb a:first-child{color:#111;font-weight:700}.breadcrumb span{color:#aab2bb}.product-hero{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(340px,.88fr);gap:70px;min-height:545px;padding-bottom:28px}.product-gallery{min-width:0}.main-media{position:relative;height:445px;overflow:hidden;background:#fff}.model-view,.image-view{position:absolute;inset:0;margin:0}.model-view{display:none;border-radius:4px;background:#22272e}.model-view.is-active{display:block}.three-stage{position:absolute;inset:0;background:radial-gradient(circle at 50% 42%,#39424d 0,#2b323a 48%,#1d2228 100%)}.main-media[data-theme="cool"] .model-view,.main-media[data-theme="cool"] .three-stage{background:radial-gradient(circle at 50% 42%,#eef3f8 0,#d8e1eb 55%,#c4cfdb 100%)}.main-media[data-theme="warm"] .model-view,.main-media[data-theme="warm"] .three-stage{background:radial-gradient(circle at 50% 42%,#f0ece5 0,#ded6ca 55%,#c9bdae 100%)}.main-media[data-theme="dark"] .model-view,.main-media[data-theme="dark"] .three-stage{background:radial-gradient(circle at 50% 42%,#39424d 0,#2b323a 48%,#1d2228 100%)}.model-tag{position:absolute;left:18px;top:16px;padding:9px 13px;border:1px solid rgba(255,255,255,.45);border-radius:6px;color:#fff;background:rgba(26,31,37,.48);font-weight:700;letter-spacing:.08em}.model-tag span{font-size:20px;vertical-align:-1px}.model-tools{position:absolute;right:16px;top:14px;display:flex;gap:8px}.viewer-btn{height:42px;display:flex;align-items:center;gap:7px;border:1px solid rgba(255,255,255,.35);border-radius:7px;padding:0 13px;background:rgba(31,37,44,.72);color:#fff;cursor:pointer}.viewer-btn svg{width:18px;height:18px;fill:currentColor}.viewer-btn.is-active{border-color:#7aa0ff;color:#aac1ff}.background-switcher{position:absolute;left:18px;bottom:18px;display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:999px;color:#fff;background:rgba(21,25,30,.62);font-size:12px}.theme-dot{width:22px;height:22px;padding:0;border:2px solid rgba(255,255,255,.62);border-radius:50%;cursor:pointer}.theme-dot[data-theme="cool"]{background:#dce5ee}.theme-dot[data-theme="warm"]{background:#d8cdbf}.theme-dot[data-theme="dark"]{background:#242a31}.theme-dot.is-selected{outline:2px solid #6d97ff;outline-offset:2px}.model-tip{position:absolute;right:17px;bottom:17px;margin:0;color:#d3dae2;font-size:11px}.load-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(27,32,38,.9);color:#fff;z-index:5}.load-overlay.is-done{display:none}.load-overlay>div{width:min(340px,70%);display:flex;justify-content:space-between}.load-overlay i{width:min(340px,70%);height:5px;margin-top:10px;background:rgba(255,255,255,.2);border-radius:9px;overflow:hidden}.load-overlay b{display:block;width:0;height:100%;background:#668fff;transition:width .18s}.model-error{position:absolute;z-index:6;left:50%;top:50%;transform:translate(-50%,-50%);padding:18px 20px;border-radius:8px;background:#fff;color:#222;text-align:center}.model-error button{display:block;margin:12px auto 0;border:0;background:#3669ff;color:#fff;padding:8px 16px;border-radius:5px}.image-view{display:flex;align-items:center;justify-content:center;background:#fff}.image-view[hidden]{display:none}.image-view img{width:100%;height:100%;object-fit:contain}.image-view figcaption{position:absolute;left:14px;bottom:12px;padding:5px 9px;border-radius:4px;background:rgba(255,255,255,.9);color:#555;font-size:12px}.zoom-button{position:absolute;right:14px;top:14px;width:42px;height:42px;border:1px solid #d9dfe6;background:#fff;border-radius:7px;cursor:pointer}.zoom-button svg{width:20px;fill:#53606e}.media-thumbs{display:flex;gap:10px;align-items:center;overflow-x:auto;padding:12px 2px 6px;scrollbar-width:thin}.media-thumb{position:relative;flex:0 0 70px;height:58px;border:1px solid #e2e6eb;border-radius:4px;background:#f6f7f8;padding:3px;cursor:pointer}.media-thumb img{width:100%;height:100%;object-fit:contain}.media-thumb span{position:absolute;right:3px;bottom:2px;padding:1px 4px;background:#3669ff;color:#fff;font-size:9px;border-radius:2px}.media-thumb.is-selected{border:2px solid #3669ff;padding:2px}.product-summary{padding-top:6px}.product-summary h1{margin:0 0 12px;font-size:32px;font-weight:400;line-height:1.2;color:#35383d}.part-line{height:54px;padding:0 17px;background:#f7f7f7;border-radius:7px;display:flex;align-items:center;justify-content:space-between;color:#888}.part-line b{color:#d67b00}.product-summary h2{margin:9px 0 24px;font-size:14px;color:#111}.product-summary ul{margin:0;padding-left:18px;color:#31353a}.product-overview-copy{margin-top:28px;padding-top:18px;border-top:1px solid #ececec}.product-overview-copy strong{color:#111}.product-overview-copy p{color:#6e747b;margin:7px 0 0}.share-rail{position:fixed;right:26px;top:50%;z-index:20;display:flex;flex-direction:column;align-items:center;padding:12px 10px 7px;border-radius:11px;background:#888;color:#fff;gap:8px}.share-rail>span{text-align:center;font-size:12px}.share-rail a{display:flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:5px;background:#1b1d20;font-weight:700}.share-rail a:nth-of-type(1){background:#1877f2}.share-rail a:nth-of-type(2){background:#f00}.share-rail a:nth-of-type(4){background:#111}.share-rail a:nth-of-type(5){background:#cb1f27}.share-rail a:nth-of-type(6){background:#0a66c2;font-size:11px}.sticky-tabs{position:sticky;top:0;z-index:15;background:#f3f3f3;border-top:1px solid #eee;border-bottom:1px solid #eee}.tab-row{display:flex;align-items:center;gap:34px;overflow-x:auto}.tab-button{position:relative;flex:0 0 auto;height:50px;border:0;background:none;color:#626970;font-weight:700;cursor:pointer}.tab-button.is-active{color:#111}.tab-button.is-active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:#e53a3a}.product-details{padding-top:10px;padding-bottom:70px}.tab-panel{padding-top:0}.tab-panel[hidden]{display:none}.detail-images{width:min(930px,100%);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start}.detail-images img{display:block;width:100%;height:auto;background:#eef1f4}.tab-panel h2{font-size:26px;font-weight:500}.tab-panel>p{color:#666}.spec-table{border-top:1px solid #e1e5ea}.spec-table div{display:grid;grid-template-columns:minmax(150px,35%) minmax(0,1fr);gap:18px;padding:15px 18px;border-bottom:1px solid #e1e5ea}.spec-table div:nth-child(odd){background:#f7f8fa}.spec-table span{color:#6d737b}.panel-source-image{display:block;width:min(600px,100%);height:auto;margin:32px auto}.empty-panel{min-height:230px}.tab-panel details{border-bottom:1px solid #ddd;padding:14px 0}.tab-panel summary{cursor:pointer;font-weight:700}.tab-panel details p{color:#666}.chat-widget{position:fixed;right:0;bottom:0;z-index:25;width:270px;background:#fff;border:1px solid #e0e2e5;border-radius:9px 0 0 0;box-shadow:0 3px 15px rgba(0,0,0,.12);overflow:hidden}.chat-widget p{margin:0;padding:17px 21px 15px;line-height:1.45}.chat-widget>div{background:#4ba9dc;color:#fff;padding:8px 15px;font-size:16px}.chat-close{position:absolute;right:5px;top:2px;border:0;background:none;color:#999;font-size:20px;cursor:pointer}.chat-widget.is-closed{display:none}footer{background:#22272d;color:#d7dce2;padding:48px 0}.footer-grid{display:grid;grid-template-columns:1fr 1fr 1.2fr;gap:45px}.footer-grid h2{font-size:16px;color:#fff}.footer-grid p{margin:7px 0;color:#b9c0c8}.footer-brand{display:inline-block;margin-bottom:8px}.image-dialog{width:min(95vw,1100px);height:min(92vh,900px);padding:42px 12px 12px;border:0;border-radius:8px;background:#fff}.image-dialog::backdrop{background:rgba(0,0,0,.72)}.image-dialog img{width:100%;height:100%;object-fit:contain}.image-dialog button{position:absolute;right:10px;top:5px;border:0;background:none;font-size:30px;cursor:pointer}
@media(max-width:1200px){.share-rail{display:none}}
@media(max-width:900px){.header-inner{height:66px}.menu-button{display:block}.main-nav{position:absolute;z-index:50;left:18px;right:18px;top:90px;display:none;flex-direction:column;align-items:flex-start;gap:0;padding:8px;background:#fff;border:1px solid #e2e6ea;box-shadow:0 8px 28px rgba(0,0,0,.12)}.main-nav.is-open{display:flex}.main-nav a{width:100%;padding:13px}.product-hero{grid-template-columns:1fr;gap:25px}.main-media{height:520px}.product-summary{padding-bottom:20px}.detail-images{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.chat-widget{display:none}}
@media(max-width:600px){body{font-size:13px}.shell{width:min(100% - 24px,1120px)}.utility-contact span,.utility-contact a:first-of-type,.utility-links span{display:none}.header-inner{height:58px}.breadcrumb{height:48px;white-space:nowrap;overflow-x:auto}.product-hero{min-height:0;padding-bottom:16px}.main-media{height:440px;border-radius:5px}.model-tools{right:8px;top:8px;gap:4px}.viewer-btn{width:40px;height:38px;justify-content:center;padding:0}.viewer-btn span{display:none}.model-tag{left:8px;top:8px;padding:7px 9px}.background-switcher{left:8px;bottom:8px}.background-switcher>span{display:none}.model-tip{display:none}.product-summary h1{font-size:27px}.part-line{height:48px}.tab-row{gap:20px}.tab-button{height:46px}.footer-grid{grid-template-columns:1fr}.detail-images{gap:8px}}

@media(max-width:600px){.spec-table div{grid-template-columns:1fr;gap:5px}.spec-table strong{overflow-wrap:anywhere}}

/* Two-model Three.js trackball viewer */
.model-tag,.model-tools,.background-switcher,.model-tip{z-index:4}
.main-media:fullscreen,.main-media:-webkit-full-screen{width:100vw;height:100vh;border-radius:0}
.main-media:fullscreen .model-view,.main-media:-webkit-full-screen .model-view{border-radius:0}
.main-media:fullscreen .model-tip,.main-media:-webkit-full-screen .model-tip{font-size:13px}
.media-thumb[data-kind="model"]{background:#272e36}
.media-thumb[data-kind="model"] img{border-radius:2px}

.three-stage{overflow:hidden;touch-action:none;cursor:grab;user-select:none;-webkit-user-select:none;isolation:isolate}
.three-stage:active{cursor:grabbing}
.three-stage:after{content:"";position:absolute;z-index:0;left:50%;bottom:7%;width:48%;height:12%;transform:translateX(-50%);border-radius:50%;background:radial-gradient(ellipse,rgba(0,0,0,.28) 0,rgba(0,0,0,.12) 42%,rgba(0,0,0,0) 74%);filter:blur(8px);pointer-events:none}
#three-canvas{position:absolute;inset:0;z-index:1;display:block;width:100%;height:100%;touch-action:none;outline:none}
#three-canvas:focus-visible{box-shadow:inset 0 0 0 3px rgba(109,151,255,.9)}
.three-poster{position:absolute;z-index:2;inset:0;width:100%;height:100%;object-fit:contain;background:transparent;pointer-events:none;transition:opacity .18s}
.three-poster[hidden]{display:none}
.model-tag,.model-tools,.background-switcher,.model-tip{z-index:4}
.load-overlay{z-index:5}
.model-error{z-index:6}
.main-media:fullscreen,.main-media:-webkit-full-screen{width:100vw;height:100vh;border-radius:0}
.main-media:fullscreen .model-view,.main-media:-webkit-full-screen .model-view{border-radius:0}
.main-media:fullscreen .model-tip,.main-media:-webkit-full-screen .model-tip{font-size:13px}
.media-thumb[data-kind="model"]{background:#272e36}
.media-thumb[data-kind="model"] img{border-radius:2px}

/* Smooth Arcball viewer: keep the canvas on its own compositor layer. */
#three-canvas{backface-visibility:hidden;-webkit-backface-visibility:hidden;contain:strict}