:root{--ink:#202925;--muted:#626d66;--green:#245744;--green-dark:#173e30;--mint:#ddecce;--paper:#fff;--soft:#f5f7f4;--line:#dce2da;--max:1280px;--header:88px;--space:104px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-offset, var(--header)) + 24px)}body{margin:0;font-size:1rem;line-height:1.8}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}a,button{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible{outline:3px solid #87a94c;outline-offset:5px}p,h1,h2,h3,h4,figure{margin:0}h1,h2,h3,h4{line-height:1.35}button{border:0}
.container{width:min(var(--max),calc(100% - 112px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{min-height:var(--header);display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;line-height:1.2}
.brand-mark{display:grid;place-items:center;width:44px;height:44px;background:var(--green);color:white;font-size:1.6875rem;font-weight:700;border-radius:3px}
.brand strong{font-size:1.4375rem;letter-spacing:3px}
.brand small{display:block;margin-top:6px;font-size:0.75rem;letter-spacing:1px;color:var(--muted)}
.main-nav{display:flex;align-items:center;gap:30px;font-size:0.875rem}
.main-nav a:hover{color:var(--green)}
.nav-phone{font-weight:600;border-left:1px solid var(--line);padding-left:26px;white-space:nowrap}
.nav-phone span{margin-left:12px}
.menu-toggle{display:none}
.hero{display:grid;grid-template-columns:1.03fr 1fr;gap:48px;padding-top:48px;padding-bottom:48px;align-items:stretch}
.hero-copy{padding-block:42px 24px}
.eyebrow{color:var(--green);font-size:0.75rem;letter-spacing:2px;font-weight:600;line-height:1.5;margin-bottom:26px}
.hero .eyebrow{font-size:0.875rem;letter-spacing:3px;display:flex;gap:12px;align-items:center}
.line{width:25px;height:1px;background:var(--green)}h1{font-size:clamp(2.375rem,3.55vw,3.375rem);font-weight:650;letter-spacing:-1.5px;line-height:1.35}h1 span{color:var(--green)}
.hero-subtitle{font-size:1.1875rem;font-weight:550;margin-top:26px;line-height:1.6}
.hero-description{font-size:0.9375rem;color:var(--muted);margin-top:16px;line-height:1.95}
.hero-actions{display:flex;gap:14px;margin-top:30px}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:36px;padding:12px 24px;font-size:0.875rem;font-weight:550;border:1px solid var(--green);border-radius:3px;transition:background .18s,color .18s}
.button-primary{background:var(--green);color:white}
.button-primary:hover{background:var(--green-dark)}
.button-outline:hover{background:var(--soft)}
.hero-note{font-size:0.75rem;color:var(--muted);margin-top:24px}
.hero-note span{margin-inline:10px;color:#a2aaa4}
.hero-visual{min-height:480px;position:relative;overflow:hidden;border-radius:5px;background:#232d28 url('assets/film-hero.png') center/cover no-repeat;color:white}
.hero-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.22),transparent 35%,rgba(0,0,0,.6));pointer-events:none}
.visual-top{position:absolute;top:24px;left:26px;right:26px;display:flex;justify-content:space-between;font-size:0.625rem;letter-spacing:1.5px;z-index:1}
.material-label{position:absolute;bottom:60px;left:30px;z-index:1}
.material-label>span{display:block;font-size:0.75rem;letter-spacing:2px;margin-bottom:6px}
.material-label strong{font-size:1.5625rem;letter-spacing:1px;font-weight:500}
.hero-visual figcaption{position:absolute;bottom:20px;left:30px;z-index:1;font-size:0.75rem;color:#d1d8d3}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);padding-block:32px 44px;border-top:1px solid var(--line)}
.metrics>div{padding-left:32px;border-left:1px solid var(--line)}
.metrics>div:first-child{padding-left:0;border-left:0}
.metrics strong{font-size:2.125rem;font-weight:550;letter-spacing:-1px;line-height:1.3}
.metrics strong span{font-size:0.9375rem;font-weight:450;letter-spacing:0}
.metrics p{font-size:0.8125rem;color:var(--muted);margin-top:8px}
.metric-unit{font-size:0.6875rem}
.section{padding-block:var(--space)}
.products-section{background:var(--soft)}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:44px}
.section-heading .eyebrow{margin-bottom:18px}h2{font-size:2.25rem;font-weight:550;letter-spacing:-.8px}
.section-heading>p{font-size:0.9375rem;line-height:1.9;color:var(--muted);padding-bottom:4px}
.featured-product{display:grid;grid-template-columns:.9fr 1.1fr;border:1px solid #cedac9;border-radius:5px;overflow:hidden;background:white}
.product-intro{background:#e9efe3;padding:34px 40px 40px}
.product-topline{display:flex;align-items:center;justify-content:space-between;margin-bottom:30px}
.pill{font-size:0.75rem;background:var(--green);color:white;padding:3px 12px;border-radius:2px}
.product-index{font-size:0.875rem;color:var(--muted);font-variant-numeric:tabular-nums}
.material-code{font-size:2.1875rem;line-height:1.3;letter-spacing:-.5px;font-weight:550;color:var(--green)}
.material-code span{font-size:1.1875rem;font-weight:400}
.product-intro h3{font-size:1.8125rem;margin-top:12px}
.product-intro>p:not(.material-code){font-size:0.9375rem;color:#53634f;margin-top:22px;max-width:370px}
.text-link{font-size:0.875rem;font-weight:550;display:flex;align-items:center;justify-content:space-between;padding-block:15px 0;border-top:1px solid #bacbb4;margin-top:28px;color:var(--green)}
.text-link:hover{text-decoration:underline;text-underline-offset:4px}
.product-specs{padding:42px}
.product-specs h4{font-size:1.25rem;font-weight:550;margin-bottom:14px}
.product-specs>p{font-size:0.9375rem;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-block:24px}
.tags span{font-size:0.75rem;color:var(--green);background:#f0f4ed;border:1px solid #e1e9dc;padding:3px 10px;border-radius:2px}
.spec-list{margin:0;font-size:0.875rem}
.spec-list>div{display:grid;grid-template-columns:90px 1fr;gap:12px;padding-block:14px;border-top:1px solid var(--line)}dt{color:var(--muted)}dd{margin:0}
.product-specs .product-footnote{font-size:0.75rem;margin-top:12px}
.secondary-products{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px}
.product-card{padding:34px 40px;background:white;border:1px solid var(--line);border-radius:5px}
.product-category{font-size:0.75rem;color:var(--muted);letter-spacing:1px}
.product-card h3{font-size:1.5rem;margin-block:12px 18px}
.product-card>p:not(.material-code){font-size:0.9375rem;color:var(--muted)}
.product-card .material-code{font-size:1.875rem}
.product-card .text-link{border-top:0;margin-top:16px}
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);margin-top:52px}
.advantages-grid article{padding:32px 26px 0;border-left:1px solid var(--line)}
.advantages-grid article:first-child{padding-left:0;border-left:0}
.advantages-grid article:last-child{padding-right:0}
.adv-number{font-size:0.875rem;color:var(--green)}
.advantages-grid h3{font-size:1.125rem;margin-block:27px 14px;font-weight:550}
.advantages-grid p{font-size:0.875rem;color:var(--muted);line-height:1.95}
.about-section{border-top:1px solid var(--line);padding-top:88px}
.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px}
.about-grid h2{font-size:2.5rem}
.location-label{margin-top:34px;display:flex;gap:12px;align-items:center;font-size:0.8125rem;color:var(--muted)}
.location-label span{display:grid;place-items:center;width:28px;height:28px;border:1px solid var(--line);border-radius:50%;color:var(--green)}
.about-copy h3{font-size:1.375rem;font-weight:550;margin-bottom:20px}
.about-copy p{font-size:0.9375rem;color:var(--muted);margin-bottom:18px;line-height:2}
.industries{display:flex;flex-wrap:wrap;gap:10px 22px;border-top:1px solid var(--line);padding-top:24px;margin-top:26px;font-size:0.8125rem;color:var(--green)}
.contact-section{background:var(--green-dark);color:white;padding-block:72px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px}
.contact-section .eyebrow{color:#bed2b3;margin-bottom:22px}
.contact-section h2{font-size:2.375rem;margin-bottom:24px}
.contact-section p{font-size:0.875rem;color:#d1dfd0}
.contact-section .contact-visit{font-size:0.8125rem;margin-top:8px;color:#bdcebd}
.contact-details{padding-top:20px}
.contact-label{font-size:0.8125rem;color:#c0d1be}
.contact-phone{display:flex;gap:20px;align-items:center;justify-content:space-between;font-size:clamp(1.5625rem,2.8vw,2.625rem);font-weight:450;letter-spacing:-.8px;white-space:nowrap;line-height:1.6;margin-top:10px}
.contact-phone span{font-size:1.875rem;color:#c7dcaa}
.copy-phone{background:transparent;color:#d8e6ce;padding:7px 0;font-size:0.8125rem;display:flex;align-items:center;gap:14px;text-decoration:underline;text-underline-offset:4px}
.contact-section #copy-status{min-height:24px;font-size:0.8125rem;color:#e5efd9;overflow-wrap:anywhere}
.address{border-top:1px solid #456252;padding-top:20px;margin-top:20px}
.address>span{font-size:0.75rem;color:#c0d1be}
.address p{margin-top:5px}
.site-footer{padding-block:27px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:0.75rem;color:var(--muted)}
.footer-brand{font-size:1.125rem;font-weight:600;color:var(--green);letter-spacing:1px}
.footer-brand span{font-size:0.625rem;font-weight:400;margin-left:10px;letter-spacing:2px}
.footer-inner>a:last-child{font-size:0.75rem}
.mobile-contact,.mobile-only{display:none}
.skip-link{position:fixed;top:-100px;left:16px;z-index:40;background:white;padding:12px 18px}
.skip-link:focus{top:12px}
@media(min-width:1500px){.hero{gap:64px}
.hero-copy{padding-top:60px}
.hero-visual{min-height:530px}}
@media(max-width:1100px){.container{width:calc(100% - 64px)}
.main-nav{gap:20px}
.nav-phone{display:none}
.hero{gap:28px}
.hero-copy{padding-top:22px}h1{font-size:2.5rem}
.hero-subtitle{font-size:1.0625rem}
.hero-description{font-size:0.875rem}
.desktop-break{display:none}
.metrics>div{padding-left:20px}
.metrics strong{font-size:1.8125rem}
.metric-unit{display:none}
.product-intro,.product-specs,.product-card{padding:30px}
.advantages-grid article{padding-inline:20px}
.advantages-grid h3{font-size:1.0625rem}
.contact-grid{gap:50px}}
@media(max-width:760px){:root{--header:74px;--space:64px}
.container{width:calc(100% - 40px)}
.brand-mark{width:36px;height:36px;font-size:1.4375rem}
.brand strong{font-size:1.25rem}
.brand small{font-size:0.625rem}
.menu-toggle{display:flex;align-items:center;gap:12px;background:none;padding:10px 0 10px 12px;font-size:0.875rem}
.menu-toggle span{font-size:1.25rem}
.main-nav{position:absolute;top:100%;left:0;right:0;background:white;border-bottom:1px solid var(--line);padding:12px 20px 22px;display:none;flex-direction:column;align-items:stretch;gap:0;box-shadow:0 14px 20px #1326190a}
.main-nav.is-open{display:flex}
.main-nav>a{padding:12px 4px}
.main-nav .nav-phone{display:block;border-left:0;border-top:1px solid var(--line);margin-top:8px}
.hero{grid-template-columns:1fr;padding-top:25px;gap:30px;padding-bottom:28px}
.hero-copy{padding:12px 0 0}
.hero .eyebrow{font-size:0.75rem;margin-bottom:20px}h1{font-size:clamp(2.0625rem,7.8vw,3.0rem);letter-spacing:-1px}
.hero-subtitle{font-size:1rem;margin-top:20px}
.hero-description{font-size:0.875rem;margin-top:12px}
.hero-actions{margin-top:24px}
.button{padding:11px 19px;gap:32px}
.hero-note{margin-top:20px}
.hero-visual{min-height:350px}
.material-label strong{font-size:1.4375rem}
.visual-top{left:22px;right:22px}
.material-label,.hero-visual figcaption{left:22px}
.metrics{grid-template-columns:1fr 1fr;padding-block:8px 28px;row-gap:0}
.metrics>div{padding:22px 12px;border-bottom:1px solid var(--line)}
.metrics>div:nth-child(odd){padding-left:0;border-left:0}
.metrics>div:nth-child(even){padding-left:22px}
.metrics>div:nth-child(n+3){border-bottom:0}
.metrics strong{font-size:1.75rem}
.metrics p{font-size:0.75rem;line-height:1.7}
.metrics strong span{font-size:0.8125rem}
.section-heading{display:block;margin-bottom:28px}
.section-heading>p{margin-top:18px;font-size:0.875rem}
.section-heading .eyebrow{margin-bottom:16px}h2{font-size:1.8125rem;line-height:1.4}
.featured-product{grid-template-columns:1fr}
.product-intro,.product-specs,.product-card{padding:26px}
.product-intro h3{font-size:1.625rem}
.product-intro>p:not(.material-code){max-width:none}
.product-topline{margin-bottom:24px}
.product-specs h4{font-size:1.125rem}
.spec-list>div{grid-template-columns:76px 1fr;gap:10px}
.secondary-products{grid-template-columns:1fr;gap:20px;margin-top:20px}
.product-card h3{font-size:1.375rem}
.product-card .material-code{font-size:1.75rem}
.advantages-grid{grid-template-columns:1fr 1fr;margin-top:28px}
.advantages-grid article{padding:25px 20px 24px;border-bottom:1px solid var(--line)}
.advantages-grid article:nth-child(odd){border-left:0;padding-left:0}
.advantages-grid article:nth-child(even){padding-right:0}
.advantages-grid h3{font-size:1.0625rem;margin-top:16px}
.advantages-grid p{font-size:0.8125rem}
.about-grid{grid-template-columns:1fr;gap:34px}
.about-grid h2{font-size:2rem}
.location-label{margin-top:24px}
.about-copy h3{font-size:1.25rem}
.contact-section{padding-block:52px}
.contact-grid{grid-template-columns:1fr;gap:24px}
.contact-section h2{font-size:2rem}
.contact-phone{font-size:2.125rem}
.contact-details{padding-top:8px}
.footer-inner{flex-wrap:wrap;gap:14px}
.footer-brand{width:100%}
.footer-inner p{font-size:0.6875rem}
.site-footer{padding-bottom:100px}
.mobile-contact{position:fixed;bottom:0;left:0;right:0;z-index:19;display:grid;grid-template-columns:1fr 2fr;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:white;border-top:1px solid var(--line);gap:10px;font-size:0.875rem}
.mobile-contact a{padding:10px;text-align:center;border-radius:3px;background:var(--soft)}
.mobile-contact a:last-child{background:var(--green);color:white}}
@media(max-width:370px){.container{width:calc(100% - 32px)}
.hero-actions{gap:10px}
.button{padding-inline:16px;gap:24px}
.product-intro,.product-specs,.product-card{padding:22px}
.contact-phone{font-size:1.8125rem}
.advantages-grid{grid-template-columns:1fr}
.advantages-grid article{padding:22px 0;border-left:0}
.mobile-contact{font-size:0.8125rem;padding-inline:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media print{.site-header,.hero-actions,.copy-phone,.mobile-contact,.skip-link{display:none}
.container{width:100%}
.section{padding-block:30px}
.hero-visual{display:none}
.hero{display:block}
.contact-section{background:white;color:var(--ink)}
.contact-section p,.contact-section .eyebrow{color:var(--muted)}
.product-card,.featured-product{break-inside:avoid}
.site-footer{padding-bottom:0}}

/* 正文采用可随浏览器字体设置缩放的字号。 */
.hero-description,.product-intro>p:not(.material-code),.product-specs>p:not(.product-footnote),.product-card>p:not(.material-code),.about-copy p,.advantages-grid p{font-size:1rem}
.spec-list,.main-nav,.button,.text-link,.contact-section p,.industries,.tags span,.product-category,.contact-label,.copy-phone{font-size:.875rem}
.brand small,.visual-top,.hero-note,.metric-unit,.footer-brand span,.footer-inner p{font-size:.75rem}
@media(max-width:760px){.mobile-only{display:initial}}
/* 放大文字时允许网格收缩和电话号码换行，保留所有内容。 */
.hero>* , .featured-product>*,.secondary-products>*,.about-grid>*,.contact-grid>*{min-width:0}
.contact-phone{white-space:normal;flex-wrap:wrap;overflow-wrap:anywhere;gap:8px}
.hero-actions{flex-wrap:wrap}
.visual-top{gap:16px;flex-wrap:wrap}
.material-label{bottom:3.75rem}
.hero-visual figcaption{bottom:1.25rem;right:20px}
@media(max-width:760px){.site-footer{padding-bottom:calc(var(--mobilebar, 74px) + 26px)}html{scroll-padding-bottom:calc(var(--mobilebar,74px) + 16px)}.main-nav{max-height:calc(100dvh - var(--header-offset, var(--header)) - var(--mobilebar,74px));overflow-y:auto}}

@media(max-width:760px){.header-inner{gap:12px;padding-block:12px}.brand{flex-shrink:1;min-width:0}.brand>span:last-child{min-width:0}.brand-mark{flex-shrink:0}.brand small{line-height:1.5}.menu-toggle{flex-shrink:0;white-space:nowrap}.brand strong{letter-spacing:1px}}

.footer-legal{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px 18px}.icp-link{font-size:.75rem}.icp-link:hover{text-decoration:underline;text-underline-offset:3px}@media(max-width:760px){.footer-legal{justify-content:flex-start}}

/* 首页底部独立居中展示备案信息，兼容手机底部联系栏。 */
.footer-registration{display:flex;justify-content:center;text-align:center;margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.footer-registration .icp-link{display:inline-block;font-size:.875rem;line-height:1.75;color:var(--muted);padding:6px 8px;overflow-wrap:anywhere}
.footer-registration .icp-link:hover{color:var(--green)}