:root{--ink:#17202a;--muted:#687385;--blue-950:#06182a;--blue-900:#082642;--blue-800:#0a3a63;--blue-700:#0c4e86;--steel-100:#f4f7fa;--steel-200:#e6edf3;--steel-300:#d2dde7;--copper:#b96428;--copper-2:#df8a3f;--white:#ffffff;font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,sans-serif;color:var(--ink);background:var(--white)}*{box-sizing:border-box}html{scroll-behavior:smooth}section[id]{scroll-margin-top:92px}body{margin:0;min-width:320px}img{display:block;max-width:100%}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.site-header{position:fixed;z-index:50;top:0;left:0;right:0;display:grid;grid-template-columns:minmax(220px,320px) 1fr auto;align-items:center;grid-gap:28px;gap:28px;height:78px;padding:0 clamp(20px,4vw,68px);color:var(--white);background:rgba(6,24,42,.92);border-bottom:1px solid rgba(255,255,255,.12);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand img{width:min(270px,52vw);height:auto}.nav{display:flex;align-items:center;justify-content:center;gap:clamp(18px,2.3vw,34px);font-size:15px;font-weight:600}.nav a{position:relative;padding:29px 0;color:rgba(255,255,255,.86)}.nav a:after{position:absolute;left:0;right:0;bottom:21px;height:2px;content:"";transform:scaleX(0);background:var(--copper-2);transition:transform .18s ease}.nav a:focus-visible:after,.nav a:hover:after{transform:scaleX(1)}.header-phone,.primary-action,.secondary-action,.section-heading a{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;border-radius:6px;font-weight:700}.header-phone{padding:0 16px;white-space:nowrap}.header-phone,.menu-button{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18)}.menu-button{display:none;width:42px;height:42px;align-items:center;justify-content:center;color:var(--white);border-radius:6px}.hero{position:relative;display:grid;grid-gap:clamp(14px,2vw,18px);gap:clamp(14px,2vw,18px);min-height:690px;padding:98px clamp(20px,5vw,86px) 22px;color:var(--white);background:linear-gradient(90deg,rgba(6,24,42,.98),rgba(6,24,42,.86) 45%,rgba(6,24,42,.38)),url(http://www.hxnhcl.com.cn/static/upload/image/20230529/1685324194326172.jpg) 50% /cover;overflow:hidden}.hero:after{position:absolute;left:0;right:0;bottom:0;height:180px;content:"";background:linear-gradient(180deg,transparent,rgba(4,17,31,.72));pointer-events:none}.hero-category-board,.hero-main,.hero-service-row{position:relative;z-index:2}.hero-main{display:grid;grid-template-columns:minmax(0,.92fr) minmax(540px,1.08fr);grid-gap:clamp(26px,3.4vw,48px);gap:clamp(26px,3.4vw,48px);align-items:center}.hero-copy{position:relative;align-self:center;max-width:720px}.hero h1{margin:0;max-width:740px;font-size:clamp(38px,3.85vw,60px);line-height:1.08;letter-spacing:0}.hero-copy p{max-width:640px;margin:16px 0 0;color:rgba(255,255,255,.82);font-size:clamp(16px,1.16vw,18px);line-height:1.68}.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px}.primary-action{padding:0 24px;color:var(--white);background:linear-gradient(135deg,var(--copper),var(--copper-2));box-shadow:0 12px 28px rgba(185,100,40,.28)}.secondary-action{padding:0 22px;color:var(--white);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22)}.hero-product-stage{position:relative;display:flex;align-items:center;min-height:300px;margin-right:clamp(-42px,-3vw,-20px)}.hero-product-banner{width:100%;min-height:300px;background:linear-gradient(90deg,rgba(6,24,42,.5),rgba(6,24,42,.02) 34%,rgba(6,24,42,.1)),url(/images/hero-products-banner.png) 50% /cover no-repeat;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 96%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 96%,transparent)}.hero-category-board{display:grid;align-items:flex-end}.hero-category-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));grid-gap:12px;gap:12px}.hero-category-tile{position:relative;display:grid;grid-template-rows:auto auto;min-height:clamp(146px,12vw,250px);overflow:hidden;border:1px solid rgba(255,255,255,.34);border-radius:7px;background:rgba(255,255,255,.95);box-shadow:0 20px 42px rgba(0,0,0,.2);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.hero-category-tile:focus-visible,.hero-category-tile:hover{transform:translateY(-4px);border-color:rgba(223,138,63,.72);box-shadow:0 26px 54px rgba(0,0,0,.28)}.hero-tile-head{display:grid;grid-template-columns:auto 1fr auto;grid-gap:8px;gap:8px;align-items:center;min-height:58px;padding:9px 10px 6px}.hero-tile-head strong{display:grid;place-items:center;width:36px;height:36px;color:var(--white);background:var(--blue-950);border-bottom:3px solid var(--copper-2);border-radius:4px;font-size:18px;line-height:1}.hero-tile-head span{color:var(--blue-900);font-size:15px;font-weight:900;line-height:1.25}.hero-tile-head svg{flex:0 0 auto;color:var(--copper)}.hero-category-tile img{width:100%;height:auto;aspect-ratio:360/190;padding:0;align-self:flex-end;object-fit:contain;background:linear-gradient(180deg,#fbfcfd,var(--steel-100))}.hero-category-tile.is-featured{border-color:rgba(223,138,63,.76);box-shadow:0 24px 52px rgba(185,100,40,.24)}.hero-category-tile.is-featured .hero-tile-head span{color:var(--copper)}.hero-service-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:12px;gap:12px;align-items:stretch}.hero-service-row article{display:grid;grid-template-columns:42px 1fr;grid-gap:14px;gap:14px;align-items:center;min-height:68px;padding:12px;color:var(--white);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:7px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.hero-service-row svg{color:var(--copper-2)}.hero-service-row h2{margin:0 0 5px;font-size:17px;line-height:1.25}.hero-service-row p{margin:0;color:rgba(255,255,255,.72);font-size:14px;line-height:1.45}.section{max-width:1240px;margin:0 auto;padding:86px 20px}.section.compact{padding:78px 20px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:30px}.section-heading h2{margin:0;color:var(--blue-900);font-size:clamp(30px,3vw,44px);letter-spacing:0}.section-heading p{max-width:640px;margin:12px 0 0;color:var(--muted);font-size:16px;line-height:1.7}.section-heading a{flex:0 0 auto;padding:0 18px;color:var(--blue-900);border:1px solid var(--steel-300);background:var(--white)}.section-heading.inverted a,.section-heading.inverted h2,.section-heading.inverted p{color:var(--white)}.section-heading.inverted a{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.22)}.category-tabs{display:flex;gap:10px;margin-bottom:24px;overflow-x:auto;padding-bottom:4px}.category-tabs button{flex:0 0 auto;min-height:40px;padding:0 16px;border:1px solid var(--steel-300);border-radius:6px;color:var(--blue-900);background:var(--white);cursor:pointer}.category-tabs button.is-active{color:var(--white);background:var(--blue-800);border-color:var(--blue-800)}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:18px;gap:18px}.article-card,.case-card,.product-card{overflow:hidden;border:1px solid var(--steel-200);border-radius:8px;background:var(--white);box-shadow:0 18px 42px rgba(9,37,64,.08)}.product-card img{width:100%;height:216px;object-fit:cover;background:var(--steel-100)}.article-card div,.case-card div,.product-card div{padding:22px}.article-card span,.case-card span,.product-card span{color:var(--copper);font-size:13px;font-weight:800}.article-card h3,.case-card h3,.product-card h3{margin:9px 0 10px;color:var(--blue-900);font-size:22px;line-height:1.3}.article-card p,.case-card p,.product-card p{margin:0;color:var(--muted);line-height:1.68}.case-card ul,.product-card ul{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0;padding:0;list-style:none}.case-card li,.product-card li{padding:7px 10px;border-radius:5px;color:var(--blue-900);background:var(--steel-100);font-size:13px;font-weight:700}.industries-section{color:var(--white);background:linear-gradient(145deg,var(--blue-950),var(--blue-800))}.industry-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));grid-gap:14px;gap:14px}.industry-card{position:relative;min-height:220px;overflow:hidden;border-radius:8px;background:var(--blue-900)}.industry-card img{width:100%;height:100%;min-height:220px;object-fit:cover;opacity:.62}.industry-card div{position:absolute;left:14px;right:14px;bottom:14px;display:flex;align-items:center;justify-content:space-between}.industry-card h3{margin:0;font-size:20px}.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:22px;gap:22px}.case-card img{width:100%;height:250px;object-fit:cover}.articles-section{padding-top:44px}.article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:18px;gap:18px}.article-card{display:grid;grid-template-columns:142px 1fr;min-height:184px}.article-card img{width:100%;height:100%;object-fit:cover}.article-archive-section{padding-top:34px}.archive-heading{display:grid;grid-template-columns:minmax(0,.7fr) minmax(320px,.5fr);grid-gap:24px;gap:24px;align-items:flex-end;margin-bottom:22px}.archive-heading h2{margin:0;color:var(--blue-900);font-size:clamp(28px,2.6vw,38px)}.archive-heading p{margin:0;color:var(--muted);line-height:1.7}.article-archive-list{display:grid;border:1px solid var(--steel-200);border-radius:8px;overflow:hidden;background:var(--white);box-shadow:0 18px 42px rgba(9,37,64,.07)}.article-archive-row{display:grid;grid-template-columns:122px minmax(0,1fr) auto;grid-gap:22px;gap:22px;align-items:center;padding:22px;border-bottom:1px solid var(--steel-200)}.article-archive-row:last-child{border-bottom:0}.article-archive-row>span{color:var(--copper);font-weight:800}.article-archive-row h3{margin:0 0 8px;color:var(--blue-900);font-size:21px}.article-archive-row p{margin:0;color:var(--muted);line-height:1.65}.article-archive-row a{display:inline-flex;align-items:center;gap:8px;min-height:38px;padding:0 14px;border:1px solid var(--steel-300);border-radius:6px;color:var(--blue-900);font-weight:800;white-space:nowrap}.about-band{display:grid;grid-template-columns:1fr auto;align-items:center;grid-gap:28px;gap:28px;padding:64px clamp(20px,5vw,86px);color:var(--white);background:linear-gradient(90deg,rgba(6,24,42,.94),rgba(6,24,42,.78)),url(http://www.hxnhcl.com.cn/pc/images/about4.jpg) 50% /cover}.about-band h2{margin:16px 0 12px;font-size:clamp(28px,3vw,42px)}.about-band p{max-width:820px;margin:0;color:rgba(255,255,255,.8);line-height:1.8}.contact-section{display:grid;grid-template-columns:minmax(0,.75fr) minmax(420px,1fr);grid-gap:36px;gap:36px;padding:84px clamp(20px,5vw,86px);color:var(--white);background:var(--blue-950)}.contact-copy h2{margin:0;font-size:clamp(32px,3.8vw,52px)}.contact-copy p{max-width:520px;color:rgba(255,255,255,.76);line-height:1.8}.contact-panel{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}.contact-panel a,.contact-panel div{display:grid;grid-template-columns:24px 52px 1fr;align-items:center;grid-gap:12px;gap:12px;min-height:76px;padding:18px;border:1px solid rgba(255,255,255,.12);border-radius:8px;background:rgba(255,255,255,.07)}.contact-panel span{color:rgba(255,255,255,.64)}.contact-panel strong{overflow-wrap:anywhere;font-size:17px}.site-footer{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;padding:24px 20px;color:rgba(255,255,255,.68);background:#04111f;font-size:13px}.site-footer a{color:inherit;text-decoration:none}.site-footer a:hover{color:#ffffff;text-decoration:underline}@media (max-width:1080px){.site-header{grid-template-columns:1fr auto auto}.menu-button{display:inline-flex;order:3}.nav{position:absolute;top:78px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;padding:10px 20px 20px;background:var(--blue-950)}.nav.is-open{display:flex}.nav a{padding:14px 0;border-bottom:1px solid rgba(255,255,255,.1)}.nav a:after{display:none}.hero{min-height:auto}.hero-main{grid-template-columns:1fr}.hero-product-stage{margin-right:0;min-height:236px}.hero-product-banner{min-height:236px}.hero-category-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.article-list,.case-grid,.hero-service-row,.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.industry-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:760px){.site-header{height:70px;padding:0 14px;gap:10px}.brand img{width:210px}.header-phone{display:none}.nav{top:70px}.hero{min-height:auto;padding:90px 18px 26px}.hero h1{font-size:32px}.hero-copy p{font-size:16px;line-height:1.65}.hero-product-stage{min-height:176px}.hero-product-banner{min-height:176px;background-position:58%}.hero-category-grid{display:flex;gap:10px;margin:0 -18px;overflow-x:auto;padding:0 18px 8px;scroll-snap-type:x mandatory}.hero-category-tile{flex:0 0 216px;min-height:0;scroll-snap-align:start}.hero-tile-head{min-height:56px;padding:9px 10px 7px}.hero-tile-head strong{width:34px;height:34px;font-size:17px}.hero-tile-head span{font-size:15px}.hero-service-row{grid-template-columns:1fr 1fr}.section,.section.compact{padding:58px 16px}.about-band,.contact-section,.section-heading{grid-template-columns:1fr}.section-heading{align-items:start}.article-list,.case-grid,.contact-panel,.product-grid{grid-template-columns:1fr}.industry-grid{grid-template-columns:1fr 1fr}.industry-card,.industry-card img{min-height:172px}.article-card{grid-template-columns:118px 1fr}.article-card div{padding:16px}.archive-heading,.article-archive-row{grid-template-columns:1fr}.article-archive-row{gap:12px}.about-band,.contact-section{padding:54px 18px}}@media (max-width:460px){.brand img{width:178px}.hero h1{font-size:31px}.hero{gap:10px;padding-top:84px;padding-bottom:18px}.hero-main{gap:22px}.hero-copy p{margin-top:14px;font-size:15px;line-height:1.55}.hero-actions,.primary-action,.secondary-action{width:100%}.hero .hero-actions{gap:8px;margin-top:18px;width:auto}.hero .primary-action{flex:1 1 190px}.hero .primary-action,.hero .secondary-action{width:auto;min-width:0;padding:0 10px;font-size:14px;white-space:nowrap}.hero .secondary-action{flex:1 1 130px}.hero-product-stage{min-height:144px}.hero-product-banner{min-height:144px;background-position:62%}.industry-grid{grid-template-columns:1fr}.hero-category-tile{flex-basis:198px;min-height:0}.hero-tile-head{min-height:54px}.hero-service-row{display:flex;gap:10px;margin:0 -18px;overflow-x:auto;padding:0 18px 6px;scroll-snap-type:x mandatory}.hero-service-row article{flex:0 0 220px;grid-template-columns:36px 1fr;padding:10px;scroll-snap-align:start}.hero-category-grid,.hero-service-row{scrollbar-width:none}.hero-category-grid::-webkit-scrollbar,.hero-service-row::-webkit-scrollbar{display:none}}