:root{--poly-green:#596b46;--poly-deep:#263129;--poly-moss:#81906d;--poly-acid:#d8df47;--poly-paper:#f4f2eb;--poly-white:#fbfaf6;--poly-ink:#1e2520;--poly-muted:#687069;--poly-line:rgba(30,37,32,.18);--poly-edge:clamp(1.25rem,4.5vw,5.5rem)}
html:has(.polytec-page){scroll-behavior:auto;scroll-padding-top:8rem}
.polytec-page{overflow-x:hidden;background:var(--poly-paper);color:var(--poly-ink)}
.polytec-page main,.poly-hero>*{min-width:0}
.polytec-page .site-header.scrolled{background:rgba(244,242,235,.94)}
.poly-kicker,.poly-index{margin:0;color:var(--poly-green);font:700 .62rem/1.5 Arial,sans-serif;letter-spacing:.22em}
.poly-hero{display:grid;grid-template-columns:1.07fr .93fr;min-height:min(100vh,58rem);background:var(--poly-white)}
.poly-hero__media{position:relative;min-height:42rem;margin:0;overflow:hidden;background:#d7d2c5}
.poly-hero__media::after{position:absolute;inset:0;background:linear-gradient(90deg,transparent 60%,rgba(0,0,0,.08));content:""}
.poly-hero__media img{width:100%;height:100%;object-fit:cover}
.poly-hero__copy{display:flex;flex-direction:column;justify-content:center;padding:9rem clamp(2rem,5vw,6rem) 5rem}
.poly-breadcrumb{display:flex;gap:.65rem;margin-bottom:3.2rem;color:var(--poly-muted);font-size:.66rem;letter-spacing:.1em}.poly-breadcrumb a{text-decoration:none}
.poly-logo{width:min(21rem,75%);height:auto;margin-bottom:2.2rem}
.poly-hero h1{max-width:8em;margin:1.15rem 0 1.6rem;font:400 clamp(3.3rem,5.2vw,6.3rem)/1.03 STSong,"Noto Serif SC",serif;letter-spacing:-.07em}
.poly-hero h1 em{color:var(--poly-green);font-style:normal}
.poly-lead{max-width:38rem;margin:0;color:#555e57;font-size:.84rem;line-height:2;letter-spacing:.04em;overflow-wrap:anywhere}
.poly-hero__facts{display:grid;grid-template-columns:repeat(3,1fr);margin-top:2.3rem;border-top:1px solid var(--poly-line);border-left:1px solid var(--poly-line)}
.poly-hero__facts div{padding:1.05rem;border-right:1px solid var(--poly-line);border-bottom:1px solid var(--poly-line)}.poly-hero__facts span{display:block;margin-bottom:.4rem;color:var(--poly-muted);font-size:.58rem}.poly-hero__facts strong{font:400 .88rem/1.5 STSong,"Noto Serif SC",serif}
.poly-link{display:inline-flex;align-items:center;justify-content:space-between;width:min(18rem,100%);margin-top:2rem;padding:.85rem 0;border-bottom:1px solid var(--poly-ink);font-size:.68rem;font-weight:700;letter-spacing:.1em;text-decoration:none}.poly-link i{font-style:normal;font-size:1rem}
.poly-local-nav{position:sticky;z-index:35;top:4.35rem;display:grid;grid-template-columns:1.4fr repeat(6,1fr);background:rgba(244,242,235,.95);border-block:1px solid var(--poly-line);backdrop-filter:blur(14px)}
.poly-local-nav a{padding:1rem .8rem;border-right:1px solid var(--poly-line);font-size:.62rem;letter-spacing:.07em;text-align:center;text-decoration:none;white-space:nowrap}.poly-local-nav a:first-child{color:white;background:var(--poly-deep)}.poly-local-nav a:hover{background:var(--poly-acid);color:var(--poly-deep)}
.poly-intro,.poly-applications,.poly-materials,.poly-process,.poly-evidence,.poly-colors{padding:clamp(5rem,9vw,9rem) var(--poly-edge)}
.poly-intro{display:grid;grid-template-columns:1.1fr .9fr;gap:4rem;background:var(--poly-white)}
.poly-intro__statement h2,.poly-section-head h2,.poly-layers h2,.poly-evidence__head h2{margin:1.2rem 0 0;font:400 clamp(2.6rem,4.8vw,5.3rem)/1.08 STSong,"Noto Serif SC",serif;letter-spacing:-.055em}.poly-intro__statement h2 span,.poly-section-head h2 span,.poly-layers h2 span,.poly-evidence__head h2 span{color:var(--poly-green)}
.poly-intro__body{padding-top:2rem}.poly-intro__body p{margin:0 0 1.3rem;color:var(--poly-muted);font-size:.82rem;line-height:2.05}
.poly-intro__principles{grid-column:1/-1;display:grid;grid-template-columns:repeat(3,1fr);margin-top:1rem;border-top:1px solid var(--poly-line);border-left:1px solid var(--poly-line)}
.poly-intro__principles article{min-height:15rem;padding:2rem;border-right:1px solid var(--poly-line);border-bottom:1px solid var(--poly-line)}.poly-intro__principles span{color:var(--poly-green);font:700 .62rem/1 Arial,sans-serif;letter-spacing:.18em}.poly-intro__principles h3{margin:4.5rem 0 .8rem;font:400 1.6rem/1.2 STSong,"Noto Serif SC",serif}.poly-intro__principles p{margin:0;color:var(--poly-muted);font-size:.75rem;line-height:1.85}
.poly-section-head{display:grid;grid-template-columns:1.15fr .85fr;gap:4rem;align-items:end;margin-bottom:3.8rem}.poly-section-head>p{max-width:37rem;margin:0;color:var(--poly-muted);font-size:.8rem;line-height:2}.poly-section-head--light h2 span{color:#b9c981}
.poly-applications{color:white;background:var(--poly-deep)}.poly-applications .poly-index{color:var(--poly-acid)}.poly-applications .poly-section-head h2 span{color:#b9c981}.poly-applications .poly-section-head>p{color:rgba(255,255,255,.67)}
.poly-gallery{display:grid;grid-template-columns:1.45fr .75fr;grid-template-rows:repeat(2,minmax(18rem,25rem));gap:1rem}.poly-gallery figure{position:relative;margin:0;overflow:hidden;background:#4d574c}.poly-gallery__large{grid-row:1/3}.poly-gallery img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.7,.2,1)}.poly-gallery figure:hover img{transform:scale(1.025)}.poly-gallery figcaption{position:absolute;right:0;bottom:0;left:0;display:flex;justify-content:space-between;padding:1.15rem 1.35rem;background:linear-gradient(transparent,rgba(0,0,0,.72));font-size:.67rem;letter-spacing:.08em}.poly-gallery figcaption span{color:var(--poly-acid);font-weight:700}
.poly-use-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:3rem;border-top:1px solid rgba(255,255,255,.22);border-left:1px solid rgba(255,255,255,.22)}.poly-use-grid div{min-height:11rem;padding:1.6rem;border-right:1px solid rgba(255,255,255,.22);border-bottom:1px solid rgba(255,255,255,.22)}.poly-use-grid strong{font:400 1.25rem/1.3 STSong,"Noto Serif SC",serif}.poly-use-grid p{margin:2.6rem 0 0;color:rgba(255,255,255,.65);font-size:.7rem;line-height:1.8}
.poly-materials{background:var(--poly-green);color:white}.poly-materials .poly-index{color:var(--poly-acid)}.poly-materials .poly-section-head>p{color:rgba(255,255,255,.7)}
.poly-material-list{border-top:1px solid rgba(255,255,255,.3)}.poly-material-list article{display:grid;grid-template-columns:.15fr .95fr 1.2fr .7fr;gap:2rem;align-items:start;padding:2.6rem 0;border-bottom:1px solid rgba(255,255,255,.3)}.poly-material-list__number{color:var(--poly-acid);font:700 .68rem/1 Arial,sans-serif}.poly-material-list__title small{color:var(--poly-acid);font:700 .58rem/1 Arial,sans-serif;letter-spacing:.18em}.poly-material-list__title h3{margin:.7rem 0 .45rem;font:400 clamp(1.6rem,2.4vw,2.7rem)/1.1 STSong,"Noto Serif SC",serif}.poly-material-list__title p{margin:0;color:rgba(255,255,255,.62);font-size:.7rem}.poly-material-list__description>p{margin:0 0 1rem;font-size:.78rem;line-height:1.9}.poly-material-list__description ul{display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0;list-style:none}.poly-material-list__description li{padding:.45rem .6rem;border:1px solid rgba(255,255,255,.28);font-size:.6rem}.poly-material-list__metric{display:grid;gap:.55rem;padding-left:1.5rem;border-left:1px solid rgba(255,255,255,.28)}.poly-material-list__metric span{color:rgba(255,255,255,.58);font-size:.58rem}.poly-material-list__metric strong{display:flex;align-items:baseline;gap:.35rem;color:var(--poly-acid);font:400 2.2rem/1 STSong,"Noto Serif SC",serif}.poly-material-list__metric strong small{font:400 .6rem/1 Arial,sans-serif}.poly-material-list__metric b{font:400 .83rem/1.5 Arial,sans-serif}.poly-material-list__metric .poly-material-list__finish{font:700 .76rem/1.5 Arial,sans-serif;letter-spacing:.08em}
.poly-layers{display:grid;grid-template-columns:.72fr 1.28fr;gap:clamp(3rem,7vw,8rem);padding:clamp(5rem,9vw,9rem) var(--poly-edge);background:var(--poly-white)}.poly-layers__copy{align-self:center}.poly-layers__copy>p:not(.poly-index){max-width:34rem;margin:2rem 0 0;color:var(--poly-muted);font-size:.78rem;line-height:2}.poly-layer-stack{display:flex;flex-direction:column;margin:0;padding:0;list-style:none}.poly-layer-stack li{position:relative;display:grid;grid-template-columns:3rem 1fr auto;align-items:center;min-height:4.4rem;margin-top:-1px;padding:0 1.3rem;border:1px solid rgba(30,37,32,.25);background:var(--layer);box-shadow:0 8px 20px rgba(30,37,32,.06);transition:.25s}.poly-layer-stack li:nth-child(2){margin-inline:.7rem}.poly-layer-stack li:nth-child(3){margin-inline:1.4rem}.poly-layer-stack li:nth-child(4){margin-inline:2.1rem}.poly-layer-stack li:nth-child(5){margin-inline:2.8rem}.poly-layer-stack li:nth-child(6){margin-inline:3.5rem}.poly-layer-stack li:nth-child(7){margin-inline:4.2rem}.poly-layer-stack li:hover{z-index:2;transform:translateY(-4px)}.poly-layer-stack span{font:700 .6rem/1 Arial,sans-serif}.poly-layer-stack strong{font:700 .7rem/1.4 Arial,sans-serif;letter-spacing:.08em}.poly-layer-stack small{font-size:.6rem}.poly-layer-stack .is-optional::after{position:absolute;right:.7rem;top:.35rem;padding:.2rem .35rem;color:white;background:var(--poly-green);content:"按条件选用";font-size:.47rem;letter-spacing:.08em}.poly-layer-stack .is-optional small{padding-right:4.2rem}
.poly-process{background:var(--poly-paper)}.poly-process__steps{margin:0;padding:0;border-top:1px solid var(--poly-line);list-style:none}.poly-process__steps li{display:grid;grid-template-columns:4rem 1fr auto;gap:2rem;align-items:center;min-height:10rem;padding:1.5rem 0;border-bottom:1px solid var(--poly-line)}.poly-process__steps>li>span{color:var(--poly-green);font:700 .65rem/1 Arial,sans-serif}.poly-process__steps small{color:var(--poly-green);font:700 .56rem/1 Arial,sans-serif;letter-spacing:.18em}.poly-process__steps h3{margin:.45rem 0 .55rem;font:400 1.5rem/1.2 STSong,"Noto Serif SC",serif}.poly-process__steps p{max-width:50rem;margin:0;color:var(--poly-muted);font-size:.72rem;line-height:1.8}.poly-process__steps b{min-width:8.5rem;padding:.8rem 1rem;border:1px solid var(--poly-line);font-size:.64rem;text-align:center}.poly-process__note{margin:1.4rem 0 0;color:var(--poly-muted);font-size:.66rem;line-height:1.8}
.poly-evidence{color:white;background:var(--poly-deep)}.poly-evidence .poly-index{color:var(--poly-acid)}.poly-evidence__head{display:grid;grid-template-columns:.95fr 1.25fr .8fr;gap:3rem;align-items:start;margin-bottom:4rem}.poly-evidence__head h2{margin:0}.poly-evidence__head h2 span{color:#b9c981}.poly-evidence__head>p{margin:0;color:rgba(255,255,255,.64);font-size:.73rem;line-height:1.9}.poly-evidence__grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid rgba(255,255,255,.24);border-left:1px solid rgba(255,255,255,.24)}.poly-evidence__grid article{min-height:17rem;padding:1.7rem;border-right:1px solid rgba(255,255,255,.24);border-bottom:1px solid rgba(255,255,255,.24)}.poly-evidence__grid span{font-size:.62rem;letter-spacing:.1em}.poly-evidence__grid strong{display:block;margin:3.7rem 0 1.4rem;color:var(--poly-acid);font:400 clamp(2.6rem,4vw,4.5rem)/1 STSong,"Noto Serif SC",serif}.poly-evidence__grid strong small{margin-left:.3rem;font:400 .65rem/1 Arial,sans-serif}.poly-evidence__grid p{margin:0;color:rgba(255,255,255,.6);font-size:.67rem;line-height:1.75}.poly-conditions{display:grid;grid-template-columns:repeat(4,1fr);margin-top:2.5rem}.poly-conditions div{padding:1.2rem;border-left:2px solid var(--poly-acid)}.poly-conditions span{display:block;margin-bottom:.5rem;color:rgba(255,255,255,.55);font-size:.57rem}.poly-conditions strong{font:400 1.3rem/1.2 STSong,"Noto Serif SC",serif}
.poly-colors{background:var(--poly-white)}.poly-swatches{display:grid;grid-template-columns:repeat(6,1fr);border-top:1px solid var(--poly-line);border-left:1px solid var(--poly-line)}.poly-swatches div{padding:1rem;border-right:1px solid var(--poly-line);border-bottom:1px solid var(--poly-line)}.poly-swatches i{display:block;aspect-ratio:1.65;background:var(--c);box-shadow:inset 0 0 0 1px rgba(0,0,0,.08)}.poly-swatches span{display:block;margin-top:.75rem;font:600 .62rem/1 Arial,sans-serif;letter-spacing:.06em}.poly-colors__cta{display:grid;grid-template-columns:1fr 1fr;min-height:33rem;margin-top:6rem;background:var(--poly-paper)}.poly-colors__cta figure{position:relative;margin:0;overflow:hidden}.poly-colors__cta figure img{width:100%;height:100%;object-fit:cover}.poly-colors__cta figcaption{position:absolute;right:1rem;bottom:1rem;padding:.6rem .8rem;background:var(--poly-white);font-size:.6rem}.poly-colors__cta>div{align-self:center;padding:clamp(2rem,5vw,5rem)}.poly-colors__cta h3{margin:1.3rem 0;font:400 clamp(2.4rem,4vw,4.5rem)/1.08 STSong,"Noto Serif SC",serif;letter-spacing:-.05em}.poly-colors__cta>div>p:not(.poly-index){color:var(--poly-muted);font-size:.76rem;line-height:1.9}.poly-colors__cta a{display:flex;justify-content:space-between;margin-top:2rem;padding:1rem 0;border-bottom:1px solid var(--poly-ink);font-size:.67rem;font-weight:700;text-decoration:none}.poly-colors__cta a i{font-style:normal}
.poly-footer{background:var(--poly-white)}
@media(max-width:980px){.poly-hero{grid-template-columns:1fr;min-height:0}.poly-hero__media{min-height:52vh;order:2}.poly-hero__copy{padding:8rem var(--poly-edge) 4rem}.poly-local-nav{grid-template-columns:repeat(7,max-content);overflow-x:auto;justify-content:start}.poly-local-nav a{min-width:9rem}.poly-intro,.poly-section-head,.poly-layers,.poly-evidence__head{grid-template-columns:1fr}.poly-intro{gap:2rem}.poly-material-list article{grid-template-columns:3rem 1fr 1fr}.poly-material-list__metric{grid-column:2/-1}.poly-gallery{grid-template-columns:1fr 1fr;grid-template-rows:30rem 21rem}.poly-gallery__large{grid-column:1/-1;grid-row:auto}.poly-evidence__grid{grid-template-columns:repeat(2,1fr)}.poly-swatches{grid-template-columns:repeat(4,1fr)}}
@media(max-width:680px){.poly-hero__copy{padding-top:7rem}.poly-logo{width:16rem}.poly-hero h1{font-size:3.25rem}.poly-hero__media{min-height:22rem}.poly-hero__facts{grid-template-columns:1fr}.poly-intro__principles,.poly-use-grid,.poly-evidence__grid,.poly-conditions{grid-template-columns:1fr}.poly-gallery{display:grid;grid-template-columns:1fr;grid-template-rows:repeat(3,21rem)}.poly-gallery__large{grid-column:auto}.poly-material-list article{grid-template-columns:2rem 1fr;gap:1.2rem}.poly-material-list__description,.poly-material-list__metric{grid-column:2}.poly-process__steps li{grid-template-columns:2.2rem 1fr;gap:1rem}.poly-process__steps b{grid-column:2;width:max-content}.poly-layer-stack li{grid-template-columns:2.4rem 1fr;min-height:5rem}.poly-layer-stack small{grid-column:2}.poly-layer-stack li:nth-child(n){margin-inline:0}.poly-swatches{grid-template-columns:repeat(2,1fr)}.poly-colors__cta{grid-template-columns:1fr}.poly-colors__cta figure{min-height:27rem}.poly-evidence__head{gap:1.5rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.poly-gallery img,.poly-layer-stack li{transition:none}}