:root{--navy:#1F2A37;--dark:#111827;--white:#fff;--gray:#E5E7EB;--muted:#64748B;--orange:#F97316;--blue:#3B82F6;--bg:#F8FAFC}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--dark);font-family:Inter,Roboto,Arial,"Microsoft YaHei",sans-serif;background:#fff;line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.container-xl{max-width:1280px;margin:auto;padding:0 24px}.topbar{background:var(--dark);color:#cbd5e1;font-size:13px}.topbar .inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}.topbar a{color:#fff}.topbar a:hover{color:#fb923c}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(15,23,42,.08)}.header-inner{height:78px;display:flex;align-items:center;gap:28px}.brand img{width:180px;height:auto;display:block}.nav{display:flex;align-items:center;gap:4px;margin-left:auto}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:6px;padding:27px 13px;font-size:15px;font-weight:650;color:#334155;white-space:nowrap}.nav-link:hover,.nav-item.active>.nav-link{color:var(--orange)}.dropdown{position:absolute;top:72px;left:0;min-width:220px;background:#fff;border:1px solid #e2e8f0;box-shadow:0 20px 50px rgba(15,23,42,.14);padding:10px;opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s}.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:none}.dropdown a{display:block;padding:10px 12px;border-radius:8px;color:#475569;font-size:14px}.dropdown a:hover{background:#fff7ed;color:var(--orange)}.header-cta{margin-left:10px;display:inline-flex;align-items:center;gap:8px;background:var(--orange);color:#fff;padding:12px 17px;border-radius:9px;font-size:14px;font-weight:700;white-space:nowrap;box-shadow:0 10px 24px rgba(249,115,22,.2)}.menu-btn{display:none;border:0;background:none;font-size:25px;color:var(--dark)}.hero{position:relative;overflow:hidden;background:var(--dark);min-height:610px;display:flex;align-items:center}.hero-bg{position:absolute;inset:0;background:linear-gradient(90deg,rgba(17,24,39,.98) 0%,rgba(17,24,39,.82) 44%,rgba(17,24,39,.22) 100%);z-index:1}.hero-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.92}.hero-content{position:relative;z-index:2;max-width:1280px;width:100%;margin:auto;padding:90px 24px;color:#fff}.eyebrow{display:inline-flex;align-items:center;gap:10px;color:#fb923c;font-weight:800;letter-spacing:2px;font-size:13px;text-transform:uppercase}.eyebrow:before{content:"";width:28px;height:2px;background:var(--orange)}.hero h1{font-size:clamp(38px,5vw,68px);line-height:1.12;max-width:780px;margin:18px 0 22px;font-weight:850;letter-spacing:-1.5px}.hero p{font-size:19px;line-height:1.8;color:#dbe4ef;max-width:680px;margin:0 0 30px}.actions{display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;padding:13px 20px;font-weight:750;border:1px solid transparent;transition:.2s}.btn-primary{background:var(--orange);color:#fff;box-shadow:0 12px 25px rgba(249,115,22,.2)}.btn-primary:hover{transform:translateY(-2px);background:#ea580c;color:#fff}.btn-light{background:#fff;color:var(--dark)}.btn-outline{border-color:#cbd5e1;color:#334155;background:#fff}.btn-dark-outline{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.04)}.section{padding:92px 0}.section-sm{padding:60px 0}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:38px}.section-kicker{font-size:12px;letter-spacing:2px;font-weight:800;color:var(--orange);text-transform:uppercase}.section-title{font-size:clamp(28px,3vw,42px);line-height:1.2;margin:8px 0 10px;color:var(--dark);font-weight:850}.section-desc{max-width:650px;color:var(--muted);margin:0}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.card{background:#fff;border:1px solid #e2e8f0;border-radius:16px;overflow:hidden;transition:.25s;box-shadow:0 8px 30px rgba(15,23,42,.04)}.card:hover{transform:translateY(-5px);box-shadow:0 18px 50px rgba(15,23,42,.1);border-color:#cbd5e1}.card-media{aspect-ratio:1.25;overflow:hidden;background:#f8fafc}.card-media img{width:100%;height:100%;object-fit:cover;transition:.4s}.card:hover .card-media img{transform:scale(1.03)}.card-body{padding:22px}.card h3{margin:0 0 8px;font-size:20px;line-height:1.35}.card p{color:var(--muted);font-size:14px;margin:0 0 15px}.arrow{color:var(--orange);font-weight:800;font-size:13px}.stat-strip{background:var(--navy);color:#fff}.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:rgba(255,255,255,.12)}.stat{padding:30px 20px;text-align:center;background:var(--navy)}.stat strong{display:block;font-size:32px;line-height:1.2}.stat span{display:block;color:#cbd5e1;font-size:13px;margin-top:5px}.dark-section{background:var(--dark);color:#fff}.dark-section .section-title{color:#fff}.dark-section .section-desc{color:#aeb9c8}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.feature{padding:22px;border:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.035);border-radius:14px}.feature-icon{width:42px;height:42px;border-radius:10px;background:rgba(59,130,246,.12);display:grid;place-items:center;color:var(--blue);font-weight:900;margin-bottom:12px}.feature h3{margin:0 0 5px;font-size:17px}.feature p{margin:0;color:#aeb9c8;font-size:13px}.process{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.process-item{text-align:center;padding:18px 10px;border:1px solid #e2e8f0;border-radius:12px;background:#fff}.process-num{width:42px;height:42px;border-radius:50%;margin:0 auto 10px;background:#fff7ed;color:var(--orange);display:grid;place-items:center;font-weight:850}.process-item strong{font-size:14px}.cta{background:linear-gradient(110deg,#111827,#1F2A37);color:#fff;border-radius:22px;padding:54px;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta h2{font-size:34px;line-height:1.25;margin:0 0 8px}.cta p{color:#cbd5e1;margin:0}.inner-hero{min-height:330px;display:flex;align-items:center;background:#111827;position:relative;overflow:hidden}.inner-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.6}.inner-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(17,24,39,.96),rgba(17,24,39,.5))}.inner-content{position:relative;z-index:2;color:#fff}.inner-content h1{font-size:clamp(34px,4vw,54px);margin:0 0 8px}.inner-content p{color:#cbd5e1;margin:0}.breadcrumb{padding:18px 0;color:#64748b;font-size:13px}.breadcrumb a:hover{color:var(--orange)}.layout{display:grid;grid-template-columns:240px 1fr;gap:36px}.side{border:1px solid #e2e8f0;border-radius:14px;padding:12px;height:max-content;position:sticky;top:100px}.side-title{font-weight:800;padding:12px;border-bottom:1px solid #e2e8f0}.side a{display:block;padding:10px 12px;border-radius:8px;color:#475569;font-size:14px}.side a:hover,.side a.active{background:#fff7ed;color:var(--orange);font-weight:700}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.product-meta{display:flex;gap:7px;flex-wrap:wrap;color:#64748b;font-size:12px}.tag{padding:4px 8px;background:#f1f5f9;border-radius:99px}.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:45px}.gallery-main{border:1px solid #e2e8f0;border-radius:18px;background:#f8fafc;overflow:hidden}.gallery-main img{width:100%;display:block}.detail-title{font-size:38px;line-height:1.2;margin:0 0 14px}.lead{font-size:17px;color:#475569}.specs{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #e2e8f0;margin:24px 0}.spec{padding:12px 0;border-bottom:1px solid #e2e8f0}.spec b{display:block;font-size:12px;color:#94a3b8;text-transform:uppercase;letter-spacing:.8px}.content{color:#334155;font-size:16px}.content h2{font-size:28px;margin:36px 0 14px;color:var(--dark)}.content h3{font-size:21px;margin:28px 0 10px}.content p{margin:0 0 15px}.content ul{padding-left:22px}.content table{width:100%;border-collapse:collapse;margin:22px 0}.content th,.content td{border:1px solid #e2e8f0;padding:11px;text-align:left}.content th{background:#f8fafc}.news-list{display:grid;gap:16px}.news-item{display:grid;grid-template-columns:220px 1fr;gap:22px;padding:18px;border:1px solid #e2e8f0;border-radius:14px}.news-item img{width:220px;height:138px;object-fit:cover;border-radius:10px}.news-date{color:#94a3b8;font-size:12px}.news-item h3{margin:4px 0 7px;font-size:21px}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}.contact-card{padding:28px;border:1px solid #e2e8f0;border-radius:16px}.contact-line{padding:14px 0;border-bottom:1px dashed #e2e8f0}.contact-line:last-child{border-bottom:0}.form-control{width:100%;border:1px solid #cbd5e1;border-radius:9px;padding:13px 14px;font:inherit;outline:none}.form-control:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(59,130,246,.1)}label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}.form-group{margin-bottom:16px}.footer{background:#0b1220;color:#aeb9c8;padding-top:65px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:45px}.footer h3,.footer h4{color:#fff;margin:0 0 14px}.footer p,.footer li{font-size:13px}.footer ul{list-style:none;padding:0;margin:0}.footer li{margin:8px 0}.footer a:hover{color:#fff}.footer-brand img{width:175px;filter:brightness(0) invert(1)}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:12px}.floating{position:fixed;right:20px;bottom:24px;z-index:900}.floating a{display:flex;align-items:center;gap:8px;background:var(--orange);color:#fff;padding:13px 16px;border-radius:999px;box-shadow:0 12px 30px rgba(249,115,22,.3);font-size:13px;font-weight:800}.mobile-bottom{display:none}.searchbox{display:flex;gap:10px;margin-bottom:30px}.empty{padding:60px 20px;text-align:center;border:1px dashed #cbd5e1;border-radius:16px;color:#64748b}
@media(max-width:1100px){.nav{gap:0}.nav-link{padding-left:9px;padding-right:9px}.header-cta{padding:11px 12px}.grid-4{grid-template-columns:repeat(2,1fr)}.product-grid{grid-template-columns:repeat(2,1fr)}.stats{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:2fr 1fr 1fr}}
@media(max-width:900px){.header-inner{height:68px}.brand img{width:155px}.menu-btn{display:block;margin-left:auto}.nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid #e2e8f0;padding:10px 18px;flex-direction:column;align-items:stretch;box-shadow:0 15px 30px rgba(15,23,42,.08)}.nav.open{display:flex}.nav-item{width:100%}.nav-link{padding:12px 5px}.dropdown{position:static;display:none;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 6px 14px}.nav-item.open .dropdown{display:block}.header-cta{margin-left:0;display:none}.hero{min-height:570px}.hero-content{padding:75px 24px}.layout{grid-template-columns:1fr}.side{position:static}.product-detail,.contact-grid{grid-template-columns:1fr}.feature-grid{grid-template-columns:repeat(2,1fr)}.process{grid-template-columns:repeat(3,1fr)}}
@media(max-width:600px){.topbar .inner{min-height:34px}.topbar .tagline{display:none}.container-xl{padding:0 16px}.hero{min-height:610px}.hero h1{font-size:38px}.hero p{font-size:16px}.section{padding:64px 0}.section-head{display:block}.grid-3,.grid-4,.product-grid{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.stat strong{font-size:25px}.feature-grid{grid-template-columns:1fr}.process{grid-template-columns:repeat(2,1fr)}.cta{padding:32px 24px;display:block}.cta .actions{margin-top:20px}.news-item{grid-template-columns:1fr}.news-item img{width:100%;height:auto}.detail-title{font-size:30px}.specs{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.floating{bottom:75px;right:12px}.mobile-bottom{display:grid;grid-template-columns:1fr 1fr;position:fixed;bottom:0;left:0;right:0;z-index:950;background:#fff;border-top:1px solid #e2e8f0;box-shadow:0 -8px 25px rgba(15,23,42,.08)}.mobile-bottom a{padding:11px;text-align:center;font-size:12px;font-weight:800}.mobile-bottom a:first-child{color:var(--orange);border-right:1px solid #e2e8f0}.inner-hero{min-height:250px}.inner-content h1{font-size:35px}}
/* TONGLI photo carousel */
.hero-slider{min-height:640px}.hero-slide{position:absolute;inset:0;display:flex;align-items:center;opacity:0;visibility:hidden;transition:opacity .65s ease,visibility .65s ease}.hero-slide.is-active{opacity:1;visibility:visible;position:relative}.hero-slide .hero-art{z-index:0}.hero-slide .hero-bg{z-index:1}.hero-slide .hero-content{z-index:2}.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:48px;height:48px;border:1px solid rgba(255,255,255,.28);background:rgba(15,23,42,.38);color:#fff;border-radius:50%;font-size:32px;line-height:1;cursor:pointer;backdrop-filter:blur(8px)}.hero-prev{left:24px}.hero-next{right:24px}.hero-arrow:hover{background:var(--orange);border-color:var(--orange)}.hero-dots{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);z-index:6;display:flex;gap:9px}.hero-dot{width:30px;height:4px;border:0;border-radius:99px;background:rgba(255,255,255,.55);padding:0;cursor:pointer}.hero-dot.is-active{background:var(--orange);width:42px}.card-media img{object-fit:cover}.inner-hero img{filter:saturate(1.05)}
@media(max-width:900px){.hero-slider{min-height:610px}.hero-content{padding:70px 24px 90px}.hero h1{font-size:clamp(34px,9vw,48px)}.hero p{font-size:16px}.hero-arrow{width:40px;height:40px;font-size:27px}.hero-prev{left:12px}.hero-next{right:12px}.hero-dots{bottom:18px}.hero-dot{width:20px}.hero-dot.is-active{width:30px}}

/* Final hero slider fix: every slide occupies the full hero viewport. */
.hero-slider{position:relative;min-height:610px;display:block;overflow:hidden}
.hero-slider .hero-slide{position:absolute!important;inset:0;width:100%;height:100%;display:flex;align-items:center;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .65s ease,visibility .65s ease}
.hero-slider .hero-slide.is-active{position:absolute!important;inset:0;width:100%;height:100%;opacity:1;visibility:visible;pointer-events:auto}
.hero-slider .hero-art{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center center}
@media(max-width:600px){.hero-slider{min-height:610px}.hero-slider .hero-slide{height:100%}.hero-slider .hero-art{object-position:center center}}