@charset "UTF-8";
:root{--ink:#333;--muted:#747474;--line:#e9e9e9;--copper:#ac7751;--light:#f6f6f6;--space:clamp(24px,5vw,80px);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--ink);background:#fff;font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:90px}
*{box-sizing:border-box}body{margin:0}h1,h2,h3,p,figure{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;border:0;cursor:pointer}a,button{touch-action:manipulation}img{display:block;max-width:100%}[hidden]{display:none!important}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--copper);outline-offset:5px}.skip-link{position:fixed;left:12px;top:10px;z-index:20;background:white;padding:15px;transform:translateY(-150%)}.skip-link:focus{transform:none}
.header{height:90px;background:#202020;color:#ddd;display:flex;justify-content:space-between;align-items:center;padding:0 var(--space);gap:30px;border-bottom:1px solid #4c4037}.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;color:#c4916e}.brand-icon{font:italic 800 36px Arial,sans-serif;width:30px}.brand-name{font-size:23px;letter-spacing:2px;font-weight:600}.brand-name small{display:block;font-size:12px;letter-spacing:1px;margin-top:5px;font-weight:400}.header nav{display:flex;align-items:center;gap:38px;font-size:14px;height:100%}.header nav a{display:flex;align-items:center;height:100%;transition:color .2s}.header nav a:hover,.header nav .nav-active{color:#c4916e}.nav-contact{gap:20px}.menu-toggle{display:none}
.hero{position:relative;height:clamp(330px,29vw,450px);background:#3a4143;overflow:hidden;color:white}.hero-banner{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 54%}.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,23,26,.62),rgba(15,23,26,.18) 54%,transparent)}.hero-inner{position:relative;z-index:1;max-width:1180px;margin:auto;padding:55px 0}.eyebrow{font-size:12px;letter-spacing:1.8px;line-height:1.8;color:#999}.hero .eyebrow{color:#d1d3d3;margin-bottom:18px}.hero h1{font-size:clamp(30px,3.2vw,48px);font-weight:500;line-height:1.4;letter-spacing:1px}.hero-description{font-size:14px;line-height:1.9;margin-top:18px;color:#e2e4e3}.hero-link{display:inline-flex;gap:30px;align-items:center;font-size:14px;margin-top:24px;border-bottom:1px solid #ffffff75;padding-bottom:8px}.scene-caption{position:absolute;z-index:1;right:26px;bottom:15px;font-size:12px;color:#fff;background:#0005;padding:4px 8px}
.section{max-width:1180px;margin:auto;padding:75px 0}.products{display:grid;grid-template-columns:180px minmax(0,1fr);gap:44px;padding-top:78px;padding-bottom:85px}.catalog-sidebar{align-self:start;position:sticky;top:35px;padding-top:54px}.catalog-sidebar h2{font-size:16px;font-weight:500;margin-bottom:20px;padding-left:13px}.category-list{display:flex;flex-direction:column}.category{display:flex;justify-content:space-between;align-items:center;background:white;color:#555;text-align:left;padding:16px 13px;font-size:14px;border-bottom:1px solid var(--line);border-left:2px solid transparent;transition:color .2s,background .2s}.category span{color:#999;font-size:12px}.category:hover{background:#f8f6f4;color:var(--copper)}.category.active{color:var(--copper);border-left-color:var(--copper);background:#f7f4f1}.sidebar-help{margin:48px 0 0 15px}.sidebar-help p{font-size:14px;color:#555;margin-bottom:13px}.sidebar-help>a:first-of-type{font-size:18px;display:block;letter-spacing:.3px}.sidebar-help>span{font-size:12px;display:block;margin-top:8px;color:#888}.sidebar-help .sidebar-contact{display:inline-block;font-size:13px;color:var(--copper);margin-top:22px}.catalog-main{min-width:0}.breadcrumb{display:flex;gap:12px;color:#999;font-size:12px;margin-bottom:25px}.breadcrumb a{color:#666}.section-heading{margin-bottom:24px}.section-heading .eyebrow{display:none}.section h2{font-size:30px;font-weight:500;line-height:1.5;letter-spacing:.3px}.section-heading>p{font-size:14px;color:#888;line-height:1.9;margin-top:13px}.filter-status{font-size:12px;color:#888;margin-bottom:22px}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:28px;row-gap:40px}.product-card{min-width:0}.product-photo{display:block;aspect-ratio:1.15/1;position:relative;background:#f6f6f6;overflow:hidden}.product-photo img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;transition:transform .35s}.product-photo:not(.c4-photo):hover img{transform:scale(1.055)}.product-index{display:none}.c4-photo img{position:absolute;max-width:none;width:137%;height:auto;left:12%;top:-50%;clip-path:inset(28.2% 50.6% 41.9% 3%);mix-blend-mode:multiply}.product-info{padding-top:20px}.product-category{display:none}.product-info h3{font-size:18px;font-weight:500;line-height:1.6;margin-bottom:10px}.product-info>p{font-size:14px;color:#777;line-height:1.85;min-height:78px}.product-tags{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:15px 0 0}.product-tags li{font-size:12px;line-height:1.6;border:1px solid #e6e1dc;color:#8b725c;padding:3px 7px}.product-spec{margin-top:18px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}summary{list-style:none;display:flex;justify-content:space-between;gap:20px;align-items:center;cursor:pointer;font-size:16px;line-height:1.8;padding:21px 0}summary::-webkit-details-marker{display:none}summary span{color:#aaa;font-size:21px;font-weight:300}details[open] summary span{transform:rotate(45deg)}details p{font-size:16px;line-height:1.9;color:#777;padding:0 0 22px}.product-spec summary{font-size:13px;padding:13px 0}.product-spec p{font-size:14px;padding-bottom:16px}.product-cta{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--copper);padding-top:16px}.product-note{font-size:12px;line-height:1.9;color:#999;margin-top:38px}
.manufacturing{display:grid;grid-template-columns:1fr 1.05fr;gap:90px;border-top:1px solid var(--line)}.section .eyebrow{color:#a28e7d;margin-bottom:15px}.manufacturing-intro>p:not(.eyebrow){font-size:16px;line-height:1.9;color:#777;margin-top:20px}.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;padding:13px 23px;min-height:48px;font-size:14px;line-height:1.6;transition:background .2s}.button-dark{background:#ac7751;color:white;margin-top:25px}.button-dark:hover{background:#8c5e3d}.manufacturing-tag{display:flex;gap:15px;font-size:12px;color:#999;margin-top:24px}.process{border-top:1px solid var(--line)}.process article{display:flex;gap:24px;padding:24px 0;border-bottom:1px solid var(--line)}.step-number{font-size:14px;color:#ac7751;padding-top:3px}.process h3{font-size:18px;line-height:1.6;font-weight:500;margin-bottom:10px}.process p{font-size:16px;line-height:1.9;color:#777}.about{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.35fr;gap:90px}.about-lead{font-size:20px;font-weight:500;margin-bottom:18px}.about-detail>p:not(.about-lead){font-size:16px;color:#777;line-height:2}.company-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding-top:24px;margin-top:26px;border-top:1px solid var(--line)}.company-facts dt{font-size:12px;color:#999;margin-bottom:12px}.company-facts dd{margin:0;font-size:14px}.faq{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.35fr;gap:90px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list p a{text-decoration:underline;text-underline-offset:3px}.text-link{display:inline-flex;align-items:center;gap:24px;font-size:14px;margin-top:25px;color:#ac7751}.contact{max-width:none;padding:62px max(var(--space),calc((100% - 1180px)/2)) 28px;background:#333;color:#eee}.contact-top{display:grid;grid-template-columns:1fr 1.2fr;gap:70px;padding-bottom:38px}.contact .eyebrow{color:#c6b3a3}.contact h2{font-size:28px;line-height:1.5;font-weight:400}.contact-top>div>p:not(.eyebrow){font-size:14px;color:#bbb;margin-top:20px;line-height:1.9}.contact-label{font-size:14px;color:#bbb}.phone{display:block;font-family:Arial,sans-serif;font-size:38px;line-height:1.4;letter-spacing:1px;margin:12px 0 22px}.contact-actions{display:flex;gap:14px;flex-wrap:wrap}.button-orange{background:#bd8a66;color:#fff}.button-orange:hover{background:#a8734e}.button-outline{border:1px solid #777;color:#ddd;background:transparent}.button-outline:hover{background:#444}.contact .contact-hint{font-size:12px;max-width:520px}.copy-status{min-height:24px}.contact .copy-status,.contact .interest-note{color:#ebc7aa;font-size:14px}.contact-bottom{border-top:1px solid #ffffff20;padding-top:25px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#bbb}.footer{background:#191919;color:#888;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px max(var(--space),calc((100% - 1180px)/2));font-size:12px}.footer-brand{color:#bbb;font-size:14px}.footer-brand span{font-size:12px;margin-left:8px}
@media(max-width:1280px){.hero-inner{margin:0 var(--space)}.section{margin-left:var(--space);margin-right:var(--space)}.contact{margin:0}.header nav{gap:27px}.products{grid-template-columns:155px minmax(0,1fr);gap:32px}.product-grid{gap:20px}.product-info>p{min-height:104px}.manufacturing,.about,.faq{gap:55px}}
@media(max-width:900px){.brand-name{font-size:20px}.brand-name small{font-size:12px;letter-spacing:0}.header nav{gap:20px}.hero{height:360px}.hero-inner{padding-top:43px}.hero h1{font-size:35px}.products{grid-template-columns:135px minmax(0,1fr);gap:25px}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.product-info>p{min-height:78px}.sidebar-help{margin-left:6px}.sidebar-help>a:first-of-type{font-size:16px}.manufacturing,.about,.faq{gap:35px}.section h2{font-size:27px}.contact-top{gap:30px}.phone{font-size:33px}}
@media(max-width:800px){.header{height:78px;position:relative}.header nav{display:none;position:absolute;z-index:10;top:100%;left:0;right:0;height:auto;background:#242424;padding:15px var(--space) 24px}.header nav.is-open{display:flex;flex-direction:column;gap:0;align-items:stretch}.header nav a{padding:14px 0}.menu-toggle{background:transparent;width:44px;height:44px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:7px}.menu-toggle span{width:24px;height:1px;background:#ddd}.nav-contact{justify-content:space-between}.section{padding-top:55px;padding-bottom:55px}.products{display:block}.catalog-sidebar{position:static;padding:0;margin-bottom:30px}.catalog-sidebar h2,.sidebar-help{display:none}.category-list{flex-direction:row;border-bottom:1px solid var(--line);gap:12px}.category{padding:12px 14px;border-left:0;border-bottom:2px solid transparent;gap:15px;background:white!important}.category.active{border-bottom-color:var(--copper)}.breadcrumb{display:none}.product-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.product-info>p{min-height:130px}.product-info h3{font-size:17px}.product-tags{min-height:64px}.product-tags li{align-self:start}.manufacturing,.about,.faq{grid-template-columns:1fr;gap:32px}.manufacturing-intro>p br{display:none}.section h2 br{display:none}.contact-top{grid-template-columns:1fr;gap:35px}.contact h2 br{display:none}.contact{padding:45px var(--space) 25px}.footer{flex-wrap:wrap;gap:16px}.footer-brand{width:100%}.hero-banner{object-position:60% center}.hero-description{max-width:320px}}
@media(max-width:540px){:root{--space:22px;scroll-padding-top:20px}.brand-name{font-size:20px}.brand-icon{font-size:33px}.hero{height:340px}.hero-inner{padding-top:34px}.hero .eyebrow{font-size:12px;letter-spacing:1px;margin-bottom:13px}.hero h1{font-size:32px;line-height:1.5}.hero-description{font-size:14px;margin-top:15px;max-width:240px}.hero-link{margin-top:19px}.hero-banner{object-position:62% center}.hero::after{background:linear-gradient(90deg,rgba(15,23,26,.7),rgba(15,23,26,.25))}.scene-caption{font-size:12px;right:12px;bottom:10px}.section{padding-top:40px;padding-bottom:40px}.category-list{gap:0;justify-content:space-between}.category{font-size:14px;gap:8px;padding:12px 10px}.category span{font-size:12px}.section h2{font-size:25px}.section-heading>p{font-size:14px}.product-grid{grid-template-columns:1fr;row-gap:35px}.product-photo{aspect-ratio:1.22/1}.c4-photo img{top:-51%}.product-info>p{min-height:0;font-size:16px}.product-info h3{font-size:21px}.product-info{padding-top:18px}.product-tags{min-height:0}.product-spec summary,.product-cta{font-size:14px}.product-spec p{font-size:16px}.product-note{font-size:12px;margin-top:30px}.company-facts{grid-template-columns:1fr;gap:20px}.company-facts>div{display:flex;align-items:center;justify-content:space-between}.company-facts dt{margin:0}.process article{gap:17px}.process h3{font-size:18px}.about-lead{font-size:20px}.phone{font-size:32px;letter-spacing:1px}.contact .button{padding:12px 15px;gap:15px}.contact-bottom{flex-wrap:wrap;gap:12px}.footer{line-height:1.8}.footer p{width:100%}}
.section .catalog-sidebar h2{font-size:16px;font-weight:500}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}

/* Official owner-provided ZNSN mark; original raster is preserved. */
.official-logo{object-fit:contain;height:auto;width:240px;flex-shrink:0}.logo-light{filter:brightness(0) invert(1)}.footer-brand .official-logo{width:155px}.about-logo{width:255px;height:auto;margin:0 0 25px}.header .brand{max-width:40%}@media(max-width:900px){.header .official-logo{width:205px}}@media(max-width:540px){.header .brand{max-width:75%}.header .official-logo{width:210px}.about-logo{width:230px}}
/* Expanded source-backed product catalog. */
.catalog-photo{aspect-ratio:1/1;background:#f4f4f4}.catalog-photo img{position:static!important;width:100%!important;height:100%!important;object-fit:contain;clip-path:none!important;mix-blend-mode:normal}.product-info h3{line-height:1.45;min-height:3em}.product-info>p{min-height:5em}.product-grid{align-items:start}.product-gallery{display:grid;gap:12px;margin:18px 0}.product-gallery img{width:100%;height:auto;display:block}.variant-list{font-size:14px;line-height:1.8;margin-top:16px}.variant-list ul{padding-left:20px;margin-top:8px}.product-tags{min-height:60px;align-content:start}.category{white-space:nowrap}.filter-status{font-size:14px}.product-spec{scroll-margin-top:30px}.catalog-sidebar{position:sticky;top:25px;align-self:start}.product-note{font-size:14px}.product-spec p{overflow-wrap:anywhere}
@media(max-width:800px){.catalog-sidebar{position:static}.category-list{overflow-x:auto;justify-content:flex-start;padding-bottom:5px}.category{flex-shrink:0}.product-info h3{min-height:0}.product-info>p{min-height:6em}}
@media(max-width:540px){.product-info>p{min-height:0}.product-tags{min-height:0}.catalog-photo{aspect-ratio:1/1}.product-grid{gap:36px}}