@import url("/mobile-polish.css?v=2");
@import url("/image-viewer.css?v=1");
@import url("/image-motion.css?v=2");

@font-face{font-family:"Alibaba PuHuiTi";src:url("/fonts/alibaba-puhuiti-regular-site.woff2") format("woff2");font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:"Alibaba PuHuiTi";src:url("/fonts/alibaba-puhuiti-medium-site.woff2") format("woff2");font-style:normal;font-weight:500;font-display:swap}
@font-face{font-family:"Alibaba PuHuiTi";src:url("/fonts/alibaba-puhuiti-semibold-site.woff2") format("woff2");font-style:normal;font-weight:600;font-display:swap}
@font-face{font-family:"QianTu HouHei";src:url("/fonts/qiantu-houhei-site.woff2") format("woff2");font-style:normal;font-weight:800;font-display:swap}
:root{--ink:#101820;--white:#fff;--soft:#faf9f6;--line:rgba(16,24,32,.16);--muted:rgba(16,24,32,.62);--quiet:rgba(16,24,32,.62);--sans:"Alibaba PuHuiTi","PingFang SC","Microsoft YaHei",sans-serif;--display:"QianTu HouHei","Alibaba PuHuiTi",sans-serif;--pad:clamp(24px,6vw,112px);--space:clamp(88px,8vw,136px)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:var(--sans);-webkit-font-smoothing:antialiased}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button{font:inherit}:focus-visible{outline:2px solid var(--ink);outline-offset:4px}::selection{color:#fff;background:var(--ink)}
.goods-header{position:fixed;z-index:30;top:0;right:0;left:0;display:grid;min-height:82px;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 clamp(20px,4.5vw,82px);border-bottom:1px solid rgba(16,24,32,.09);background:rgba(255,255,255,.94);backdrop-filter:blur(18px)}.brand{width:128px;height:60px;overflow:hidden}.brand img{width:112px;height:68px;object-fit:contain;transform:translateY(-4px)}.goods-header nav{display:flex;gap:38px;font-size:14px}.goods-header nav a{padding:30px 0;border-bottom:1px solid transparent}.goods-header nav a:hover,.goods-header nav a[aria-current="page"]{border-color:var(--ink)}.header-action{display:inline-flex;min-height:48px;align-items:center;justify-content:center;justify-self:end;gap:28px;padding:0 20px;color:#fff;border:1px solid var(--ink);background:var(--ink);font-size:14px}.header-action:hover{color:var(--ink);background:#fff}
.eyebrow{margin:0;color:var(--quiet);font-size:12px;font-weight:600;letter-spacing:.15em}.goods-hero{display:grid;min-height:100svh;grid-template-columns:1fr .78fr;gap:clamp(50px,8vw,140px);align-items:center;padding:140px var(--pad) 70px;border-bottom:1px solid var(--line)}.hero-copy{max-width:780px}.hero-copy h1{margin:16px 0 0;font-family:var(--display);font-size:clamp(64px,7vw,108px);font-weight:800;letter-spacing:-.045em;line-height:1.02}.hero-copy>p:not(.eyebrow){max-width:610px;margin:34px 0 22px;color:var(--muted);font-size:18px;line-height:1.9}.status{display:inline-block;padding:9px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--quiet);font-size:12px;letter-spacing:.06em}.hero-copy>a,.heading-note>a,.goods-closing a{display:inline-flex;align-items:center;gap:30px;margin-top:34px;padding-bottom:6px;border-bottom:1px solid var(--ink);font-size:14px}.hero-product{width:min(520px,100%);justify-self:center;margin:0}.hero-product img{width:100%;max-height:720px;object-fit:contain}.hero-product figcaption{margin-top:12px;color:var(--quiet);font-size:12px}
.product-category-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(42px,7vw,120px);padding:clamp(58px,7vw,96px) var(--pad);border-bottom:1px solid var(--line);background:#fff;scroll-margin-top:100px}.product-category-index a{position:relative;display:block;min-height:210px;padding:30px 74px 30px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}.product-category-index a+a{padding-left:clamp(28px,4vw,68px);border-left:1px solid var(--line)}.product-category-index span,.chapter-label{display:block;margin:0 0 18px;color:var(--quiet);font-size:13px;font-weight:600;letter-spacing:.08em}.product-category-index strong{display:block;font-size:clamp(30px,3vw,47px);font-weight:500;letter-spacing:-.025em}.product-category-index p{max-width:520px;margin:20px 0 0;color:var(--muted);font-size:16px;line-height:1.8}.product-category-index b{position:absolute;right:4px;bottom:30px;font-size:24px;font-weight:400;transition:transform .25s ease}.product-chapter-intro{display:grid;grid-template-columns:.34fr 1fr;gap:clamp(36px,7vw,120px);padding:var(--space) var(--pad) clamp(56px,6vw,92px);scroll-margin-top:105px}.product-chapter-intro .chapter-label{padding-top:12px;border-top:1px solid var(--ink)}.product-chapter-intro>div{max-width:980px}.product-chapter-intro h2{margin:0;font-size:clamp(46px,5vw,76px);font-weight:500;letter-spacing:-.035em;line-height:1.12}.product-chapter-intro>div>p{max-width:720px;margin:30px 0 0;color:var(--muted);font-size:17px;line-height:1.9}
.fan-feature,.collections,.process{padding:var(--space) var(--pad)}.section-heading{display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(45px,7vw,120px);align-items:end;margin-bottom:clamp(70px,8vw,120px)}.section-heading h2,.theme-heading h2,.process h2{margin:14px 0 0;font-size:clamp(43px,4.3vw,70px);font-weight:600;letter-spacing:-.03em;line-height:1.12}.heading-note p{margin:0;color:var(--muted);font-size:17px;line-height:1.9}.origin-pair{display:grid;grid-template-columns:1fr auto 1fr;gap:clamp(24px,4vw,70px);align-items:center}.origin-pair>span{font-size:36px}.origin-pair figure{margin:0;background:var(--soft)}.origin-pair img{width:100%;aspect-ratio:1/1;object-fit:cover}.origin-pair .fan-isolated img{object-fit:contain;padding:26px}.origin-pair figcaption,.mousepad-feature figcaption{display:flex;justify-content:space-between;gap:20px;padding:16px 20px;color:var(--quiet);background:#fff;font-size:12px}.handheld-study{display:grid;grid-template-columns:.8fr .6fr .6fr;gap:clamp(24px,4vw,65px);align-items:end;margin-top:clamp(85px,8vw,135px);padding-top:40px;border-top:1px solid var(--ink)}.handheld-study>div{align-self:center;max-width:480px}.handheld-study h3{margin:14px 0 20px;font-size:clamp(32px,3vw,49px);font-weight:500;letter-spacing:-.03em}.handheld-study>div>p:last-child{color:var(--muted);font-size:16px;line-height:1.85}.handheld-study figure{width:min(100%,410px);margin:0;justify-self:center}.handheld-study img{width:100%;background:#0a0a0a}.handheld-study figcaption{margin-top:10px;color:var(--quiet);font-size:12px}
.goods-open{display:block;width:100%;margin:0;padding:0;border:0;background:transparent;cursor:zoom-in}.collections{border-top:1px solid var(--line);background:var(--soft)}.theme{padding:0 0 var(--space)}.theme+.theme{padding-top:var(--space);border-top:1px solid var(--ink)}.theme-heading{display:grid;grid-template-columns:.16fr 1fr;gap:30px;max-width:1000px;margin-bottom:70px}.theme-heading>span{color:var(--quiet);font-size:13px}.theme-heading h2{font-family:var(--display);font-weight:800}.theme-heading>div>p:last-child{max-width:750px;margin:25px 0 0;color:var(--muted);font-size:17px;line-height:1.85}.mousepad-feature{width:min(1080px,100%);margin:0 auto 85px;background:#fff}.mousepad-feature img{width:100%;aspect-ratio:16/10;object-fit:cover;object-position:center 56%}.product-pair{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,70px)}.product-pair article{display:grid;grid-template-columns:1fr 1fr;background:#fff}.product-pair img{width:100%;height:100%;min-height:560px;object-fit:cover}.product-pair article>div{display:flex;justify-content:flex-end;flex-direction:column;padding:clamp(22px,3vw,48px);border-left:1px solid var(--line)}.product-pair article span{color:var(--quiet);font-size:12px;letter-spacing:.07em}.product-pair h3{margin:13px 0 18px;font-size:clamp(28px,2.5vw,42px);font-weight:500;letter-spacing:-.025em;line-height:1.25}.product-pair p{margin:0;color:var(--muted);font-size:15px;line-height:1.75}.product-pair small{margin-top:28px;color:var(--quiet);font-size:12px}.product-note{margin-top:45px;border-top:1px solid var(--ink);border-bottom:1px solid var(--line)}.product-note summary{display:flex;min-height:70px;align-items:center;justify-content:space-between;cursor:pointer;font-size:15px;list-style:none}.product-note summary::-webkit-details-marker{display:none}.product-note[open] summary span{transform:rotate(45deg)}.product-note summary span{font-size:24px;transition:transform .2s ease}.product-note>div{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:0 0 38px}.product-note p{margin:0;color:var(--muted);font-size:14px;line-height:1.8}.product-note strong{color:var(--ink);font-weight:500}.theme-bloom{padding-bottom:0}.theme-bloom .product-pair article{background:#fff}
.concept-reserve{display:grid;grid-template-columns:minmax(0,.88fr) minmax(420px,1.12fr);gap:clamp(54px,8vw,140px);align-items:center;padding:var(--space) var(--pad);border-top:1px solid var(--line);background:#fff;scroll-margin-top:105px}.concept-copy{max-width:720px}.concept-copy h2{margin:0;font-size:clamp(44px,5vw,72px);font-weight:500;letter-spacing:-.035em;line-height:1.12}.concept-copy>p:not(.chapter-label){margin:30px 0 0;color:var(--muted);font-size:17px;line-height:1.9}.concept-copy>span{display:inline-block;margin-top:34px;padding:9px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--quiet);font-size:13px;letter-spacing:.05em}.concept-stage{position:relative;display:grid;min-height:clamp(300px,28vw,400px);place-items:center;overflow:hidden;border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,#fff 0%,#f4f6f7 100%)}.concept-stage strong{position:relative;z-index:2;color:rgba(16,24,32,.13);font-size:clamp(78px,10vw,155px);font-weight:500;letter-spacing:-.07em}.concept-stage i{position:absolute;width:64%;aspect-ratio:1;border:1px solid rgba(16,24,32,.16);border-radius:38% 62% 48% 52%;transform:rotate(18deg) scaleY(.64)}.concept-stage i:nth-child(2){transform:rotate(-34deg) scaleY(.52)}
.process{border-top:1px solid var(--line)}.process>header{display:grid;grid-template-columns:.3fr 1fr;gap:40px;align-items:end;margin-bottom:75px}.process ol{display:grid;grid-template-columns:repeat(4,1fr);margin:0;padding:0;border-top:1px solid var(--ink);list-style:none}.process li{min-height:240px;padding:24px;border-right:1px solid var(--line)}.process li:last-child{border-right:0}.process li span{color:var(--quiet);font-size:12px}.process li h3{margin:60px 0 15px;font-size:25px;font-weight:500}.process li p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}.disclaimer{max-width:900px;margin:45px 0 0;color:var(--muted);font-size:14px;line-height:1.8}.goods-closing{display:grid;min-height:440px;grid-template-columns:1fr auto;gap:60px;align-items:end;padding:var(--space) var(--pad);border-top:1px solid var(--line);background:var(--soft)}.goods-closing h2{max-width:880px;margin:20px 0 0;font-size:clamp(40px,4.3vw,68px);font-weight:600;letter-spacing:-.03em;line-height:1.18}.goods-closing>div:last-child{display:flex;gap:28px;align-items:flex-end}.goods-closing a{white-space:nowrap}
.goods-viewer{width:min(1380px,calc(100% - 28px));max-width:none;height:calc(100dvh - 28px);max-height:none;margin:auto;padding:0;border:0;background:#fff;color:var(--ink)}.goods-viewer::backdrop{background:rgba(16,24,32,.78)}.viewer-bar,.viewer-controls{display:grid;min-height:72px;grid-template-columns:1fr auto;align-items:center;padding:12px 22px;border-bottom:1px solid var(--line)}.viewer-bar small{color:var(--quiet);font-size:11px;letter-spacing:.09em}.viewer-bar h2{margin:3px 0 0;font-size:23px;font-weight:500}.viewer-bar>button{width:44px;height:44px;border:0;background:transparent;cursor:pointer;font-size:30px}.viewer-stage{display:grid;height:calc(100% - 132px);place-items:center;overflow:hidden;background:var(--soft)}.viewer-stage img{width:100%;height:100%;object-fit:contain}.viewer-controls{min-height:60px;grid-template-columns:1fr auto 1fr;border-top:1px solid var(--line);border-bottom:0}.viewer-controls button{justify-self:start;padding:7px 0;border:0;border-bottom:1px solid var(--ink);background:transparent;cursor:pointer;font-size:13px}.viewer-controls button:last-child{justify-self:end}.viewer-controls span{color:var(--quiet);font-size:12px}footer{display:grid;min-height:110px;grid-template-columns:1fr auto 1fr;align-items:center;padding:20px var(--pad);border-top:1px solid var(--line);color:var(--quiet);font-size:12px}footer span:last-child{justify-self:end}
@media(hover:hover) and (pointer:fine){.product-category-index a:hover b{transform:translateX(8px)}}
@media(max-width:1080px){.goods-header{grid-template-columns:1fr auto}.goods-header nav{display:none}.goods-hero{grid-template-columns:1fr .7fr}.section-heading{grid-template-columns:1fr .8fr}.handheld-study{grid-template-columns:1fr 1fr}.handheld-study>div{grid-column:1/-1}.product-pair article{grid-template-columns:1fr}.product-pair article>div{min-height:280px;border-top:1px solid var(--line);border-left:0}.product-note>div{grid-template-columns:1fr}.concept-reserve{grid-template-columns:1fr}.concept-copy{max-width:780px}.concept-stage{min-height:360px}.goods-closing{grid-template-columns:1fr}.goods-closing>div:last-child{align-items:flex-start}footer{grid-template-columns:1fr auto}footer>span:nth-child(2){display:none}}
@media(max-width:700px){:root{--pad:20px;--space:80px}.goods-header{min-height:70px;padding:0 14px}.brand{width:105px;height:54px}.brand img{width:97px;height:60px}.header-action{min-height:40px;padding:0 13px;gap:10px}.goods-hero{min-height:auto;grid-template-columns:1fr;padding:120px 20px 70px}.hero-copy h1{font-size:clamp(55px,16vw,74px)}.status{display:block;width:max-content;max-width:100%}.hero-product{width:min(390px,90%)}.product-category-index{grid-template-columns:1fr;gap:0;padding:54px 20px}.product-category-index a{min-height:190px;padding:28px 54px 28px 0}.product-category-index a+a{padding-left:0;border-left:0}.product-category-index b{bottom:28px}.product-chapter-intro{grid-template-columns:1fr;gap:24px;padding:80px 20px 50px}.product-chapter-intro .chapter-label{padding-top:10px}.section-heading{grid-template-columns:1fr;gap:30px}.origin-pair{grid-template-columns:1fr}.origin-pair>span{justify-self:center;transform:rotate(90deg)}.handheld-study{grid-template-columns:1fr;gap:28px}.handheld-study>div{grid-column:1}.handheld-study figure{width:min(100%,360px)}.theme-heading{grid-template-columns:40px 1fr}.product-pair{grid-template-columns:1fr}.product-pair img{min-height:auto;aspect-ratio:4/5}.product-pair article>div{min-height:auto;padding:25px}.mousepad-feature img{aspect-ratio:1/1}.concept-reserve{gap:46px;padding:80px 20px}.concept-stage{min-height:290px;border-radius:20px}.process>header{grid-template-columns:1fr;gap:18px}.process ol{grid-template-columns:1fr 1fr}.process li{min-height:210px;border-bottom:1px solid var(--line)}.goods-closing{min-height:460px;padding:80px 20px}.goods-closing>div:last-child{align-items:flex-start;flex-direction:column;gap:0}.goods-viewer{width:100%;height:100dvh}.viewer-bar{padding:10px 14px}.viewer-bar h2{font-size:19px}.viewer-controls{padding:10px 14px}footer{display:flex;align-items:flex-start;flex-direction:column;gap:18px}footer span:last-child{justify-self:start}}
@media(max-width:440px){.header-action span{display:none}}
@media(max-width:340px){.process ol{grid-template-columns:1fr}.process li{min-height:180px}.process li h3{margin-top:40px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important}}

/* Final distillation: shared floating shell, one production note, and a shorter mobile reading path. */
.goods-header{top:14px;right:clamp(14px,2.4vw,38px);left:clamp(14px,2.4vw,38px);min-height:68px;padding:0 12px 0 20px;border:1px solid rgba(255,255,255,.86);border-radius:18px;background:rgba(255,255,255,.94);box-shadow:0 16px 44px rgba(16,24,32,.08),inset 0 1px 0 rgba(255,255,255,.96);backdrop-filter:none;-webkit-backdrop-filter:none}.brand{width:120px;height:56px}.brand img{width:108px;height:auto;transform:translateY(1px)}.goods-header nav a{position:relative;padding:24px 0;border:0}.goods-header nav a::after{position:absolute;right:0;bottom:15px;left:0;height:1px;content:"";background:var(--ink);transform:scaleX(0);transform-origin:right;transition:transform .35s cubic-bezier(.16,1,.3,1)}.goods-header nav a:hover::after,.goods-header nav a[aria-current="page"]::after{transform:scaleX(1);transform-origin:left}.header-action{border-radius:12px;transition:transform .24s cubic-bezier(.16,1,.3,1),background .24s ease,color .24s ease,box-shadow .24s ease}.goods-hero{min-height:min(100svh,840px);padding:120px var(--pad) 54px}.hero-copy h1{margin-top:0}.hero-copy>p:not(.eyebrow){margin:28px 0 0}.hero-copy>a{margin-top:28px}.production-note{margin:0;padding:18px var(--pad);border-bottom:1px solid var(--line);color:var(--quiet);font-size:14px;line-height:1.75}.fan-feature{scroll-margin-top:100px}.section-heading{margin-bottom:clamp(52px,6vw,82px)}.origin-pair{max-width:1180px;margin:0 auto}.origin-pair figure{border-radius:24px;overflow:hidden}.process{padding-top:clamp(72px,7vw,108px);padding-bottom:clamp(72px,7vw,108px)}

@supports (backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px)){.goods-header{background:rgba(255,255,255,.76);backdrop-filter:blur(22px) saturate(135%);-webkit-backdrop-filter:blur(22px) saturate(135%)}}

@media(max-width:700px){:root{--space:72px}.goods-header{top:8px;right:8px;left:8px;min-height:62px;padding:0 10px 0 13px}.brand{width:96px;height:50px}.brand img{width:88px;height:auto}.goods-hero{gap:26px;padding:104px 20px 48px}.hero-copy h1{font-size:clamp(52px,15vw,68px)}.hero-copy>p:not(.eyebrow){margin-top:22px;font-size:16px;line-height:1.75}.hero-copy>a{margin-top:22px}.hero-product{width:min(310px,82%)}.product-category-index{padding:44px 20px}.product-category-index a{min-height:158px;padding-top:24px;padding-bottom:24px}.production-note{padding:16px 20px;font-size:13px}.fan-feature{padding:68px 20px}.section-heading{margin-bottom:44px}.origin-pair{gap:18px}.origin-pair figcaption{padding:13px 15px}.process{padding-top:68px;padding-bottom:68px}}

@media(prefers-reduced-transparency:reduce){.goods-header{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none}}

/* Keep the content-to-product comparison compact at every breakpoint. */
.origin-pair{max-width:900px}
@media(max-width:700px){.origin-pair figure{width:min(100%,300px);justify-self:center}}

/* Balance product imagery by visual weight while preserving each source ratio. */
.hero-product{width:min(430px,100%)}
.hero-product img{max-height:610px}
.mousepad-feature{width:min(820px,100%);margin-bottom:clamp(58px,6vw,78px)}
.mousepad-feature img{height:auto;aspect-ratio:1/1;object-fit:contain;object-position:center}
.product-pair{max-width:1180px;margin-right:auto;margin-left:auto}
.product-pair article{grid-template-columns:minmax(220px,.9fr) minmax(0,1.1fr);align-items:stretch}
.product-pair .goods-open{align-self:stretch}
.product-pair img{width:100%;height:auto;min-height:0;aspect-ratio:1065/1600;object-fit:cover}
.product-pair article>div{min-height:0}

@media(max-width:1080px){
  .hero-product{width:min(380px,100%)}
  .mousepad-feature{width:min(760px,100%)}
  .product-pair article{grid-template-columns:1fr}
  .product-pair article>div{min-height:230px}
}

@media(max-width:700px){
  .hero-product{width:min(280px,78%)}
  .mousepad-feature{width:min(100%,420px);margin-bottom:54px}
  .product-pair article{width:min(100%,440px);justify-self:center}
  .product-pair img{aspect-ratio:1065/1600}
  .product-pair article>div{min-height:0}
}

/* Final product-scale tuning. */
.origin-pair .fan-isolated img{padding:10px}
.mousepad-feature{width:min(680px,100%)}
.product-pair img{object-fit:contain}
@media(max-width:1080px){.mousepad-feature{width:min(620px,100%)}}
@media(max-width:700px){.mousepad-feature{width:min(100%,420px)}}