:root{--ink:#172036;--muted:#5d6a7f;--paper:#f2fbff;--card:#fff;--accent:#38bdf8;--accent2:#67e8f9;--line:#cdeefa;--navy:#0f3a4a;--shadow:0 16px 40px rgba(15,58,74,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}a{color:inherit;text-decoration:none}img{max-width:100%}.wrap{width:min(1180px,calc(100% - 36px));margin:auto}.site-header{height:80px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}.head-inner{height:80px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;font-weight:900;letter-spacing:-.03em;white-space:nowrap}.brand img{height:62px;max-width:300px;object-fit:contain}.nav{display:flex;gap:21px;margin-left:auto;font-size:14px;font-weight:750}.nav a:hover{color:var(--accent)}.lang{position:relative}.lang summary{cursor:pointer;list-style:none}.lang-menu{position:absolute;right:0;top:32px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px;padding:10px;width:165px;display:grid}.lang-menu a{padding:7px 10px;border-radius:8px}.lang-menu a:hover{background:#e0f7ff}.menu-btn{display:none;margin-left:auto;border:0;background:var(--navy);color:#fff;border-radius:10px;padding:9px 12px}.hero{padding:78px 0 54px;background:radial-gradient(circle at 82% 20%,rgba(56,189,248,.22),transparent 23%),linear-gradient(135deg,#e0f7ff,#ffffff)}.home-hero{text-align:center}.home-hero h1,.home-hero .lede{margin-left:auto;margin-right:auto}.home-hero .hero-actions{justify-content:center}.eyebrow{display:inline-flex;gap:8px;align-items:center;color:#0284c7;font-weight:850;text-transform:uppercase;letter-spacing:.11em;font-size:12px}.eyebrow:before{content:"";width:24px;height:3px;background:var(--accent)}h1{font-size:clamp(38px,6vw,72px);line-height:1.01;letter-spacing:-.055em;margin:16px 0;max-width:900px}h2{font-size:clamp(28px,4vw,44px);line-height:1.1;letter-spacing:-.04em;margin:0 0 14px}h3{line-height:1.25}.lede{font-size:19px;color:var(--muted);max-width:720px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{height:46px;padding:0 22px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;background:var(--navy);color:#fff;font-weight:800;border:0;cursor:pointer}.btn.alt{background:#fff;color:var(--ink);border:1px solid var(--line)}.btn:hover{transform:translateY(-1px)}.section{padding:72px 0}.section.white{background:#fff}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px}.section-head p{max-width:550px;color:var(--muted);margin:0}.seo-tags,.related{display:flex;flex-wrap:wrap;gap:10px}.tag,.related a{height:44px;padding:0 22px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--line);font-weight:750;font-size:14px}.tag:hover,.related a:hover{border-color:var(--accent);color:#0284c7}.search-box{display:flex;background:#fff;border:1px solid var(--line);border-radius:18px;padding:8px;box-shadow:var(--shadow);max-width:850px}.search-box input{flex:1;border:0;background:transparent;padding:10px 14px;font:inherit;min-width:0;outline:none}.search-notes{font-size:13px;color:var(--muted);margin-top:10px}.home-search .section-head,#featured .section-head,.seo-products .section-head{display:block;text-align:center}.home-search .search-box{margin-left:auto;margin-right:auto}.home-search .search-notes{text-align:center}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}#featured .wrap{width:min(1480px,calc(100% - 24px))}#featured .grid{gap:22px}.product{background:var(--card);border:1px solid var(--line);border-radius:20px;overflow:hidden;display:flex;flex-direction:column;min-width:0}.product-media{aspect-ratio:1/1;background:#e0f7ff;padding:18px;display:flex;align-items:center;justify-content:center}.product-media img{width:100%;height:100%;object-fit:contain}.product-body{padding:18px;display:flex;flex-direction:column;flex:1}.product-kicker{font-size:11px;color:#0284c7;font-weight:900;text-transform:uppercase;letter-spacing:.1em}.product h3{font-size:17px;margin:5px 0 10px}.price{margin-top:auto;font-weight:900;font-size:18px}.cny{display:block;color:var(--muted);font-size:12px;font-weight:600}.product .btn{height:40px;margin-top:14px;font-size:13px}.category-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.category{min-height:126px;padding:22px;background:var(--navy);color:#fff;border-radius:18px;position:relative;overflow:hidden}.category:after{content:"↗";position:absolute;right:18px;bottom:12px;font-size:28px;color:var(--accent2)}.category span{color:#ecfeff;font-size:12px}.category strong{display:block;font-size:19px;margin-top:4px}.category:hover{background:#0891b2}.faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.faq summary{font-weight:850;cursor:pointer}.faq p{color:var(--muted);margin:10px 0 0}.prose{max-width:850px}.prose h2{margin-top:38px;font-size:30px}.prose h3{margin-top:26px}.prose p,.prose li{color:#6f5f4d}.note{border-left:4px solid var(--accent);background:#e0f7ff;padding:16px 18px;border-radius:0 12px 12px 0}.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.news-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.news-card-media{display:block;aspect-ratio:843/400;background:#e0f7ff}.news-card-media img{width:100%;height:100%;object-fit:cover}.news-card-body{padding:24px}.news-card time{font-size:12px;color:var(--muted)}.news-card h2{font-size:22px;margin:10px 0}.news-card p{color:var(--muted)}.article{max-width:850px}.short-answer{font-size:19px;background:#fff;border:1px solid var(--line);padding:24px;border-radius:16px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}.article-cover{display:block;width:100%;max-height:520px;object-fit:contain;background:#e0f7ff;border-radius:18px;margin:24px 0}.footer{background:#101d33;color:#f7f9fc;padding:54px 0 30px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}.footer a{display:block;color:#cffafe;margin:7px 0}.footer small{display:block;border-top:1px solid #0e7490;margin-top:34px;padding-top:22px;color:#ecfeff}.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:28px 0}.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.stat b{font-size:24px;display:block}.mobile-seo{display:none}@media(max-width:900px){.nav{display:none}.menu-btn{display:block}.nav.open{display:grid;position:absolute;top:80px;left:0;right:0;background:#fff;padding:20px 24px;border-bottom:1px solid var(--line)}.grid{grid-template-columns:repeat(2,1fr)}.category-grid{grid-template-columns:repeat(2,1fr)}.news-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.brand img{height:48px;max-width:210px}.hero{padding:54px 0 40px}.section{padding:52px 0}.seo-tags{display:none}.grid{gap:12px}#featured .wrap{width:min(100% - 16px,1480px)}#featured .grid{gap:12px}.product-body{padding:14px}.product-media{padding:10px}.faq,.news-grid,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:8px}.stat-row{grid-template-columns:1fr}.product h3{font-size:14px}.price{font-size:16px}.category-grid{grid-template-columns:1fr 1fr}.category{min-height:105px;padding:17px}.category strong{font-size:16px}}
/* 2026-06-24 LoongBuy logo/title refresh and brand wheel */
.brand picture img,.brand img{height:46px;width:auto;display:block}.hero.home-hero h1{text-transform:none}.brand-wheel{margin-top:24px;padding:22px 0 4px;border-top:1px solid rgba(14,165,233,.18)}.brand-wheel-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:16px}.brand-wheel-head h3{margin:0;color:#14213d;font-size:26px;letter-spacing:-.03em}.brand-wheel-head a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border:1px solid #bae6fd;border-radius:999px;color:#075985;font-weight:800;background:#fff}.brand-wheel-viewport{overflow:hidden;position:relative}.brand-wheel-track{display:flex;width:max-content;gap:22px;animation:loong-brand-scroll 52s linear infinite}.brand-wheel:hover .brand-wheel-track{animation-play-state:paused}.brand-item{width:86px;flex:0 0 86px;text-align:center;color:#1f2937}.brand-logo-text{display:grid;width:78px;height:68px;margin:0 auto 8px;place-items:center;border:1px solid #dbeafe;border-radius:12px;background:#fff;box-shadow:0 4px 14px rgba(15,23,42,.06);color:#111827;font-size:18px;font-weight:950;letter-spacing:-.04em}.brand-item b{display:block;font-size:11px;line-height:1.2}.brand-item:hover .brand-logo-text{border-color:#38bdf8;transform:translateY(-2px)}@keyframes loong-brand-scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}@media(max-width:680px){.brand picture img,.brand img{height:38px}.brand-wheel-head h3{font-size:22px}.brand-wheel-track{gap:16px;animation-duration:46s}.brand-item{width:76px;flex-basis:76px}.brand-logo-text{width:70px;height:62px;font-size:15px}}


/* 2026-06-24 replace text brand wheel with sprite logo carousel */
.brand-wheel{display:none!important}.brand-section{padding:54px 0;background:#fff}.brand-section .section-header{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:20px}.brand-section .section-header h2{margin:0;color:#141827;font-size:30px;line-height:1.1;letter-spacing:-.04em}.brand-section .section-header p{margin:8px 0 0;color:#64748b}.brand-section .section-header>.button{min-height:42px;padding:10px 18px;border:1px solid #bde7f8;border-radius:8px;background:#fff;color:#0b4a5c;font-weight:850}.brand-carousel{position:relative;padding:8px 50px 18px}.brand-viewport{height:auto;overflow:hidden;scrollbar-width:none}.brand-viewport::-webkit-scrollbar{display:none}.brand-track{display:flex;width:max-content;gap:0;animation:brand-items-scroll 95s linear infinite}.brand-viewport:hover .brand-track{animation-play-state:paused}.brand-group{display:flex;gap:27px;padding-right:27px}.brand-item,.brand-item-clone{display:flex;width:74px;flex:0 0 74px;flex-direction:column;align-items:center;text-align:center;color:#333}.brand-logo{width:72px;height:72px;border:1px solid #ddd;border-radius:9px;background-color:#fff;background-repeat:no-repeat;background-size:780px auto;box-shadow:0 2px 8px rgba(15,23,42,.03)}.brand-name{margin-top:8px;color:#444;font-size:11px;font-weight:750;line-height:1.2}.brand-arrow{position:absolute;top:44px;z-index:2;width:36px;height:36px;transform:translateY(-50%);border:1px solid #dbeafe;border-radius:50%;background:#fff;color:#334155;font-size:20px}.brand-arrow.left{left:0}.brand-arrow.right{right:0}.brand-arrow:hover{border-color:#7cdda0;color:#38a765}.brand-sprite{display:none}.brand-logo-text{display:none!important}@keyframes brand-items-scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}@media(prefers-reduced-motion:reduce){.brand-track{animation:none}.brand-viewport{overflow-x:auto}}@media(max-width:680px){.brand-section .section-header{align-items:flex-start;flex-direction:column}.brand-carousel{padding:8px 38px 16px}.brand-group{gap:18px;padding-right:18px}.brand-item,.brand-item-clone{width:70px;flex-basis:70px}.brand-logo{width:68px;height:68px;background-size:760px auto}.brand-arrow{top:42px}}
/* Unified gold theme tokens and Hero color treatment */
:root{--primary:#D4A017;--primary-light:#F8E7A8;--border:#E5C76B;--paper:#FFF9E9;--accent:var(--primary);--accent2:var(--primary-light);--line:var(--border);--navy:#4A3500;--shadow:0 16px 40px rgba(91,65,0,.13)}
.hero{background:radial-gradient(circle at 82% 20%,rgba(212,160,23,.28),transparent 25%),linear-gradient(135deg,var(--primary-light),#FFF9E9)}
.hero .eyebrow{color:#8A6500}.hero .eyebrow:before{background:var(--primary)}
.hero .btn{background:var(--primary);color:#1E1808;border-color:var(--primary)}
.hero .btn.alt{background:#fff;color:#4A3500;border:1px solid var(--border)}