/* Chencheng Combined Site — modern visual system + indexed static SEO structure */
:root{
  --ink:#172033;--navy:#0f172a;--navy-2:#182844;--blue:#2563eb;--blue-2:#1d4ed8;
  --orange:#f97316;--orange-2:#fb923c;--soft:#f8fafc;--soft-blue:#eff6ff;
  --line:#e2e8f0;--muted:#64748b;--paper:#fff;--green:#16a34a;
  --shadow-sm:0 4px 16px rgba(15,23,42,.07);--shadow:0 18px 50px rgba(15,23,42,.12);
  --shadow-xl:0 28px 80px rgba(15,23,42,.20);--radius:20px;--radius-sm:13px;
}
html{scroll-padding-top:125px}
body{color:var(--ink);background:#fff;font-size:16px;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background:radial-gradient(circle at 8% 4%,rgba(37,99,235,.055),transparent 26%),radial-gradient(circle at 96% 12%,rgba(249,115,22,.045),transparent 25%)}
::selection{background:#bfdbfe;color:#0f172a}
.skip-link{position:fixed;left:14px;top:-60px;z-index:9999;padding:11px 16px;border-radius:10px;background:#fff;color:var(--navy);box-shadow:var(--shadow);font-weight:800;transition:.2s}.skip-link:focus{top:14px}
.container,.cc-container{width:min(1240px,calc(100% - 42px));margin-inline:auto}
.topbar{background:linear-gradient(90deg,#0f172a,#172554);border-bottom:1px solid rgba(255,255,255,.08)}
.topbar-inner{min-height:36px;align-items:center;padding:5px 0;color:#cbd5e1}.topbar-inner:before{content:"Factory direct · OEM/ODM · Complete production lines";font-weight:650}.topbar-inner>span{display:none}.topbar a{color:#fff;font-weight:750}
.site-header{background:rgba(255,255,255,.92);box-shadow:0 1px 0 rgba(15,23,42,.08);transition:.25s}.site-header.is-scrolled{box-shadow:0 12px 35px rgba(15,23,42,.11)}
.nav-wrap{height:84px}.brand{gap:12px}.brand img{width:58px;height:58px;border-radius:12px;background:#fff;object-fit:contain}.brand strong{font-size:19px;color:#111827}.brand small{font-size:11px;letter-spacing:.04em}
.site-header nav{gap:8px;font-size:14px}.site-header nav>a{padding:10px 11px;border-radius:10px;color:#334155;transition:.2s}.site-header nav>a:hover,.site-header nav>a[aria-current="page"]{background:#eff6ff;color:#1d4ed8}.site-header nav>a:not(.cart-link):after{display:none}
.lang-link{border:1px solid var(--line)!important;background:#fff!important;color:#334155!important}.lang-link:hover{border-color:#93c5fd!important}
.cart-link{background:var(--navy)!important;color:#fff!important;padding:10px 14px!important}.cart-link:hover{background:#1e293b!important}.cart-link span{background:var(--orange)}
.hero{position:relative;padding:86px 0 92px;background:linear-gradient(125deg,#0f172a 0%,#172554 53%,#1e3a8a 100%)}
.hero:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 18%,rgba(59,130,246,.35),transparent 28%),linear-gradient(90deg,transparent,rgba(255,255,255,.025));pointer-events:none}
.hero-grid{position:relative;z-index:1;grid-template-columns:1.05fr .95fr;gap:62px}.hero h1{font-size:clamp(43px,5.3vw,72px);letter-spacing:-.055em;max-width:800px}.hero-copy>p{font-size:19px;line-height:1.75;color:#dbeafe}.eyebrow.light{color:#fdba74}.hero-actions{margin:32px 0}.btn{border-radius:12px;min-height:46px;padding:12px 20px;box-shadow:none}.btn.primary{background:linear-gradient(135deg,var(--orange),#fbbf24);color:#111827}.btn.primary:hover{box-shadow:0 12px 30px rgba(249,115,22,.28)}.btn.ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.22)}
.trust-row{gap:12px}.trust-row span{padding:13px 14px;border:1px solid rgba(255,255,255,.12);border-radius:12px;background:rgba(255,255,255,.045)}
.hero-media{position:relative}.hero-collage{display:grid;grid-template-columns:1.15fr .85fr;grid-template-rows:1fr 1fr;gap:12px;min-height:520px;transform:rotate(1deg)}.hero-collage img{width:100%;height:100%;object-fit:cover;border-radius:20px;border:1px solid rgba(255,255,255,.16);box-shadow:0 22px 60px rgba(0,0,0,.28)}.hero-collage img:first-child{grid-row:1/3}.hero-collage img:nth-child(2),.hero-collage img:nth-child(3){min-height:250px}.hero-badge{bottom:20px;left:-25px;border-radius:16px;border:1px solid #e2e8f0;display:flex;align-items:center;flex-wrap:wrap}.hero-badge:before{content:"✓";display:inline-grid;place-items:center;width:28px;height:28px;margin-right:8px;border-radius:50%;background:#dcfce7;color:#15803d;font-weight:900}
.home-stat-strip{position:relative;z-index:5;margin-top:-34px}.home-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;border-radius:18px;background:#fff;box-shadow:var(--shadow);border:1px solid var(--line)}.home-stat-grid>div{padding:25px 28px;border-right:1px solid var(--line)}.home-stat-grid>div:last-child{border:0}.home-stat-grid strong{display:block;font-size:29px;color:#1d4ed8}.home-stat-grid span{font-size:13px;color:var(--muted)}
.section{padding:88px 0}.section.alt{background:linear-gradient(180deg,#f8fafc,#f1f5f9)}.section-head{margin-bottom:38px}.section-head h2,.two-col h2,.factory-split h2,.about-grid h2,.faq-grid h2,.product-content h2{font-size:clamp(31px,3.7vw,48px);color:var(--navy)}.eyebrow{color:#2563eb;letter-spacing:.14em}.section-head>p{font-size:16px;line-height:1.75}
.category-grid{grid-template-columns:repeat(2,1fr);gap:22px}.category-card{grid-template-columns:220px 1fr;border-radius:20px;border-color:#e2e8f0;box-shadow:0 2px 0 rgba(15,23,42,.02)}.category-card:hover{transform:translateY(-7px);box-shadow:var(--shadow)}.category-card img{min-height:235px;padding:12px;object-fit:contain;background:linear-gradient(145deg,#fff,#f8fafc)}.category-card>div{padding:27px}.category-card h3{font-size:25px}.category-card strong{color:#2563eb}
.product-grid{gap:24px}.product-card{border-radius:19px;border-color:#e2e8f0;box-shadow:0 2px 0 rgba(15,23,42,.02);display:flex;flex-direction:column}.product-card:hover{transform:translateY(-7px);box-shadow:var(--shadow)}.card-image{position:relative;height:265px;background:linear-gradient(145deg,#fff,#f8fafc);overflow:hidden}.card-image:after{content:"View product";position:absolute;right:14px;bottom:14px;padding:7px 11px;border-radius:999px;background:rgba(15,23,42,.82);color:#fff;font-size:11px;font-weight:800;opacity:0;transform:translateY(7px);transition:.2s}.product-card:hover .card-image:after{opacity:1;transform:none}.card-image img{transition:.35s}.product-card:hover .card-image img{transform:scale(1.035)}.card-body{display:flex;flex-direction:column;flex:1;padding:23px}.card-body h3{font-size:20px}.card-body p{flex:1}.card-actions{border-top:1px solid #edf2f7;padding-top:16px}.text-link{color:#2563eb}
.process-section{background:linear-gradient(160deg,#eff6ff,#fff 52%,#fff7ed)}.process-section>.container>div{padding:30px;border:1px solid #dbeafe;border-radius:20px;background:rgba(255,255,255,.82);box-shadow:var(--shadow-sm)}.process-list span{background:linear-gradient(135deg,#f97316,#fbbf24)}
.factory-split{gap:62px}.factory-gallery{gap:12px}.factory-gallery img{border-radius:18px;box-shadow:var(--shadow-sm)}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.why-card{padding:25px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow-sm)}.why-icon{width:46px;height:46px;display:grid;place-items:center;border-radius:13px;background:#eff6ff;color:#2563eb;font-size:23px;margin-bottom:17px}.why-card h3{font-size:19px;margin:0 0 8px}.why-card p{color:var(--muted);font-size:14px;margin:0}
.dark-section{background:linear-gradient(125deg,#0f172a,#172554)}.quote-band{padding:10px 0}.quote-band h2{max-width:880px}
.page-hero,.category-hero,.article-head{background:linear-gradient(125deg,#0f172a,#172554 60%,#1e3a8a)}.page-hero,.category-hero{padding:74px 0}.page-hero h1,.category-hero h1{font-size:clamp(40px,5vw,64px)}.category-hero-grid{grid-template-columns:1fr 480px}.category-hero img{border-radius:22px;box-shadow:var(--shadow-xl);border:1px solid rgba(255,255,255,.14)}
.breadcrumbs{padding-top:18px;padding-bottom:18px}.breadcrumbs a{color:#2563eb}.breadcrumbs span{color:#94a3b8}
.product-top{background:linear-gradient(180deg,#fff,#f8fafc)}.product-layout{grid-template-columns:minmax(0,1.05fr) minmax(370px,.95fr);gap:54px;align-items:start}.product-gallery{position:sticky;top:130px}.main-image{position:relative;height:570px;border-radius:22px;background:#fff;border-color:#e2e8f0;box-shadow:var(--shadow-sm);overflow:hidden;cursor:zoom-in}.main-image:after{content:"Click to enlarge";position:absolute;right:14px;bottom:14px;padding:8px 12px;border-radius:999px;background:rgba(15,23,42,.78);color:#fff;font-size:11px;font-weight:800;pointer-events:none}.main-image img{transition:.25s}.main-image:hover img{transform:scale(1.018)}.gallery-thumbs{padding:4px 1px 8px;scrollbar-width:thin}.gallery-thumb{flex:0 0 105px;height:90px;border-radius:12px;border:2px solid transparent;box-shadow:0 0 0 1px var(--line);transition:.2s}.gallery-thumb:hover{transform:translateY(-2px)}.gallery-thumb.is-active,.gallery-thumb[aria-selected="true"]{border-color:#2563eb!important;box-shadow:0 0 0 3px rgba(37,99,235,.12)!important}.gallery-arrow{position:absolute;top:50%;z-index:3;width:43px;height:43px;border:1px solid rgba(15,23,42,.1);border-radius:50%;background:rgba(255,255,255,.92);box-shadow:var(--shadow-sm);display:grid;place-items:center;font-size:20px;transform:translateY(-50%);transition:.2s}.gallery-arrow:hover{background:#fff;transform:translateY(-50%) scale(1.06)}.gallery-prev{left:13px}.gallery-next{right:13px}.product-summary{padding:30px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow-sm)}.product-summary h1{font-size:clamp(36px,4vw,50px)}.lead{font-size:17px;line-height:1.75}.summary-facts{gap:10px}.summary-facts div{border:1px solid #e2e8f0;background:#f8fafc;border-radius:13px}.product-assurance{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:18px 0}.product-assurance span{padding:10px 8px;border-radius:10px;background:#eff6ff;color:#1e40af;text-align:center;font-size:12px;font-weight:800}.inquiry-box{border-radius:16px;background:#f8fafc}.inquiry-box input{background:#fff}.product-tabs{top:84px;box-shadow:0 6px 20px rgba(15,23,42,.05)}.product-tabs a{padding:17px 0}.product-tabs a:hover{color:#2563eb}
.answer-card{border-left:0;border:1px solid #bfdbfe;background:linear-gradient(145deg,#eff6ff,#fff);box-shadow:var(--shadow-sm)}.table-wrap{border-radius:17px;box-shadow:var(--shadow-sm)}.spec-table th{background:#eff6ff;color:#1e3a8a}.spec-table tr:hover td{background:#fafcff}.product-video video{max-height:620px;object-fit:contain;border-radius:18px;box-shadow:var(--shadow-sm)}.video-unavailable{border-radius:18px}.application-grid>div{border-radius:16px;background:#fff;box-shadow:var(--shadow-sm)}.accordion details{border-radius:14px;box-shadow:0 3px 12px rgba(15,23,42,.035)}
.solution-cards>a{border-radius:22px}.solution-cards img{height:390px}.stats div{border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow-sm)}.certificate-grid>div{border-radius:20px;box-shadow:var(--shadow-sm)}.masonry figure{border-radius:18px;box-shadow:var(--shadow-sm)}
.contact-grid{align-items:start}.contact-list>div{padding:20px;border:1px solid var(--line);border-radius:15px;margin-bottom:12px;background:#fff;box-shadow:var(--shadow-sm)}.quote-form{border-radius:22px}.quote-form input,.quote-form textarea,.quote-form select{border-radius:11px;min-height:46px}.cart-item{border-radius:16px;background:#fff;box-shadow:var(--shadow-sm)}.cart-summary{border-radius:18px;border:1px solid var(--line)}
.blog-card{border-radius:20px;background:#fff;box-shadow:var(--shadow-sm);transition:.2s}.blog-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.article-head h1{font-size:clamp(41px,5vw,62px)}.article-body{line-height:1.85}.article-body h2{color:var(--navy)}
.site-footer{background:#0f172a}.footer-grid{padding-top:70px}.footer-brand img{border-radius:12px}.site-footer a:hover{color:#fff}.legal{color:#94a3b8}
.floating-wa{width:58px;height:58px;background:#22c55e;box-shadow:0 16px 38px rgba(34,197,94,.32)}.back-to-top{position:fixed;right:22px;bottom:90px;z-index:59;width:44px;height:44px;border:1px solid var(--line);border-radius:50%;background:#fff;color:#0f172a;box-shadow:var(--shadow-sm);opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s}.back-to-top.is-visible{opacity:1;visibility:visible;transform:none}
.lightbox{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center;padding:28px;background:rgba(2,6,23,.94);backdrop-filter:blur(10px)}.lightbox.open{display:flex}.lightbox-figure{position:relative;width:min(1200px,92vw);height:min(820px,84vh);display:grid;place-items:center}.lightbox img{max-width:100%;max-height:100%;object-fit:contain;border-radius:12px;background:#fff}.lightbox-close,.lightbox-prev,.lightbox-next{position:absolute;width:48px;height:48px;border:1px solid rgba(255,255,255,.2);border-radius:50%;background:rgba(15,23,42,.72);color:#fff;font-size:25px;display:grid;place-items:center}.lightbox-close{right:0;top:-58px}.lightbox-prev{left:-64px;top:50%;transform:translateY(-50%)}.lightbox-next{right:-64px;top:50%;transform:translateY(-50%)}.lightbox-caption{position:absolute;left:0;right:0;bottom:-42px;color:#e2e8f0;text-align:center;font-size:13px}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .55s ease,transform .55s ease}.reveal.is-visible{opacity:1;transform:none}
.mobile-product-cta{display:none}
@media(max-width:1050px){.site-header nav{gap:3px}.site-header nav>a{padding:9px 7px}.hero-grid{gap:35px}.hero-collage{min-height:450px}.category-hero-grid{grid-template-columns:1fr 410px}.why-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:980px){.nav-wrap{height:76px}.site-header nav{top:76px;border-radius:0 0 18px 18px;box-shadow:var(--shadow);gap:5px}.site-header nav>a{padding:12px 14px}.product-tabs{top:76px}.hero-grid,.category-hero-grid,.product-layout{grid-template-columns:1fr}.hero-media{max-width:760px}.product-gallery{position:static}.home-stat-grid{grid-template-columns:repeat(2,1fr)}.home-stat-grid>div:nth-child(2){border-right:0}.home-stat-grid>div:nth-child(-n+2){border-bottom:1px solid var(--line)}}
@media(max-width:680px){.container,.cc-container{width:min(100% - 24px,1240px)}.topbar-inner:before{content:"Factory direct · Complete production lines"}.topbar-inner a{font-size:11px}.brand strong{font-size:16px}.hero{padding:58px 0 65px}.hero h1{font-size:40px}.hero-copy>p{font-size:17px}.hero-collage{min-height:360px;grid-template-columns:1fr 1fr}.hero-collage img:first-child{grid-column:1/3;grid-row:auto;height:220px}.hero-collage img:nth-child(2),.hero-collage img:nth-child(3){min-height:140px;height:150px}.hero-badge{left:10px;bottom:-18px}.home-stat-strip{margin-top:-18px}.home-stat-grid>div{padding:18px}.home-stat-grid strong{font-size:23px}.section{padding:62px 0}.category-card{grid-template-columns:1fr}.category-card img{height:245px}.why-grid{grid-template-columns:1fr}.product-summary{padding:22px}.main-image{height:360px}.gallery-arrow{width:38px;height:38px}.product-assurance{grid-template-columns:1fr}.product-tabs{top:70px}.lightbox{padding:16px}.lightbox-prev{left:4px}.lightbox-next{right:4px}.lightbox-close{right:4px;top:4px}.lightbox-caption{bottom:8px;background:rgba(15,23,42,.68);padding:8px}.mobile-product-cta{position:fixed;z-index:70;left:0;right:0;bottom:0;display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:9px 12px calc(9px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);border-top:1px solid var(--line);box-shadow:0 -10px 30px rgba(15,23,42,.12)}.mobile-product-cta a,.mobile-product-cta button{min-height:44px}.page-product{padding-bottom:72px}.floating-wa{bottom:78px}.back-to-top{bottom:146px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}

/* Working in-page English/Chinese language switch */
.lang-switch{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:7px 12px;border:1px solid rgba(255,255,255,.32);border-radius:999px;background:rgba(255,255,255,.1);color:inherit;font:inherit;font-weight:800;line-height:1;cursor:pointer;white-space:nowrap;transition:.2s ease}
.lang-switch:hover,.lang-switch:focus-visible{background:#fff;color:#0b3655;border-color:#fff;outline:none;transform:translateY(-1px)}
.site-footer .footer-lang-switch{margin-top:8px;border-color:rgba(255,255,255,.25);background:transparent;color:#fff}
.lang-zh body,.lang-zh button,.lang-zh input,.lang-zh select,.lang-zh textarea{font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif}
@media(max-width:860px){.site-header nav .lang-switch{width:100%;margin:4px 0;padding:12px}.site-footer .footer-lang-switch{width:auto}}


/* Uploaded product media integration — 2026-07-29 */
.gallery-thumbs{display:flex;gap:10px;overflow-x:auto;scroll-snap-type:x proximity;padding-bottom:10px}
.gallery-thumb{scroll-snap-align:start}
.product-video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;align-items:start}
.product-video-grid.single-video{grid-template-columns:minmax(0,1fr)}
.product-video-item{margin:0;border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden;box-shadow:var(--shadow-sm)}
.product-video-item video{display:block;width:100%;height:min(520px,55vw);min-height:320px;object-fit:contain;background:#07111b;border-radius:0;box-shadow:none}
.product-video-item figcaption{padding:13px 16px;color:var(--navy);font-size:14px;font-weight:800;border-top:1px solid var(--line)}
.media-note{margin-top:14px}
@media(max-width:760px){.product-video-grid{grid-template-columns:1fr}.product-video-item video{height:72vw;min-height:280px}.gallery-thumb{flex-basis:92px;height:78px}}

/* Auxiliary machinery media integration — 2026-07-29 */
.specs-layout .auxiliary-video-grid{grid-template-columns:minmax(0,1fr)}
.uploaded-product-details{background:#fff}
.uploaded-details-grid{display:grid;grid-template-columns:minmax(0,900px);justify-content:center;gap:24px}
.uploaded-detail-item{margin:0;border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden;box-shadow:var(--shadow-sm)}
.uploaded-detail-item img{width:100%;height:auto;object-fit:contain;background:#f8fafc}
.uploaded-detail-item figcaption{padding:13px 16px;color:var(--navy);font-size:14px;font-weight:800;border-top:1px solid var(--line)}
@media(max-width:760px){.uploaded-product-details .section-head{align-items:start}.uploaded-detail-item{border-radius:14px}}