/* SINGYIN site — dark industrial theme (charcoal #1A1A1A + signal green #9EFF00) */
:root{
  --bg:#1A1A1A; --bg2:#242424; --bg3:#161616; --line:#262626; --line2:#333;
  --txt:#FFFFFF; --txt2:#A3A3A3; --txt3:#7A7A7A; --acc:#9EFF00; --acc-dark:#0A0A0A;
  --radius:6px; --maxw:1280px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:"Barlow","Segoe UI",Arial,"Noto Sans",sans-serif;line-height:1.5}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3{font-weight:600;line-height:1.15}
.muted{color:var(--txt3)}
[dir="rtl"] body{font-family:"Noto Sans Arabic","Segoe UI",sans-serif}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line)}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:8px 40px;background:var(--bg3);font-size:13px;color:var(--txt3);flex-wrap:wrap}
.topbar-right{display:flex;gap:20px;align-items:center}
.lang-switch a{color:var(--txt3);font-weight:600}
.lang-switch a.active{color:var(--acc)}
.lang-switch .sep{color:var(--line2);margin:0 4px}
.moq-tag{color:var(--acc);font-weight:600}
.navbar{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:14px 40px;max-width:var(--maxw);margin:0 auto;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;letter-spacing:1px}
.logo sup{font-size:10px}
.logo-mark{width:32px;height:32px;border-radius:6px;background:var(--acc);color:var(--acc-dark);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:20px}
.nav{display:flex;gap:26px;flex-wrap:wrap}
.nav a{color:var(--txt2);font-size:15px;font-weight:500}
.nav a:hover{color:var(--acc)}
.header-actions{display:flex;gap:10px;align-items:center}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-size:14px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:.15s}
.btn-primary{background:var(--acc);color:var(--acc-dark)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-outline{border-color:var(--acc);color:var(--acc);background:transparent}
.btn-outline:hover{background:rgba(158,255,0,.08)}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-block{width:100%}
.btn:disabled{opacity:.6;cursor:wait}

/* hero */
.hero{display:flex;gap:48px;align-items:center;padding:64px 40px;max-width:var(--maxw);margin:0 auto}
.hero-text{flex:1;min-width:300px}
.eyebrow{display:inline-block;border:1px solid var(--acc);color:var(--acc);font-size:12px;font-weight:600;letter-spacing:2px;padding:6px 14px;border-radius:100px;margin-bottom:22px}
.hero h1{font-size:48px;margin-bottom:18px}
.hero-sub{color:var(--txt2);font-size:18px;max-width:560px;margin-bottom:26px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{border:1px solid var(--line);color:var(--txt3);font-size:13px;padding:8px 16px;border-radius:100px}
.hero-img{width:44%;min-width:320px}
.hero-img img{border-radius:10px;border:1px solid var(--line)}

/* usp strip */
.usp-strip{display:flex;flex-wrap:wrap;gap:14px 32px;justify-content:center;padding:22px 40px;background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.usp-item{display:flex;align-items:center;gap:9px;font-weight:600;font-size:15px}
.usp-dot{width:8px;height:8px;border-radius:2px;background:var(--acc)}

/* sections */
.section{max-width:var(--maxw);margin:0 auto;padding:64px 40px}
.section.alt{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.sec-head h2,.section h2{font-size:32px;margin-bottom:8px}
.sec-head p{color:var(--txt3)}
.sec-link{color:var(--acc);font-weight:600;white-space:nowrap}

/* category & product cards */
.cgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.ccard,.pcard,.ncard{background:var(--bg2);border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;flex-direction:column;transition:.15s}
.ccard:hover,.pcard:hover,.ncard:hover{border-color:var(--acc);transform:translateY(-2px)}
.ccard-img,.pcard-img{position:relative;aspect-ratio:4/3;background:#2E2E2E;overflow:hidden}
.ccard-img img,.pcard-img img{width:100%;height:100%;object-fit:cover}
.stock-tag{position:absolute;top:10px;inset-inline-start:10px;border:1px solid var(--acc);color:var(--acc);font-size:11px;font-weight:700;letter-spacing:1px;padding:3px 8px;background:rgba(26,26,26,.85)}
.ccard-body,.pcard-body,.ncard{padding:18px}
.ccard-body h3,.pcard-body h3,.ncard h3{font-size:17px;margin-bottom:6px}
.ccard-body p,.ncard p{color:var(--txt3);font-size:13px;margin-bottom:10px}
.spec-line{color:var(--txt3);font-size:13px;margin-bottom:10px}
.quote-link{color:var(--acc);font-weight:600;font-size:14px}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 26px}
.tab{border:1px solid var(--line);color:var(--txt2);padding:8px 16px;border-radius:100px;font-size:14px}
.tab.active{border-color:var(--acc);color:var(--acc)}

/* why / stats */
.why{display:flex;gap:48px;align-items:flex-start;flex-wrap:wrap}
.why-text{flex:1;min-width:300px}
.why-text p{margin:14px 0}
.bullets{list-style:none;display:flex;flex-direction:column;gap:10px;margin-top:6px}
.bullets li{padding-inline-start:20px;position:relative;color:var(--txt)}
.bullets li::before{content:"";position:absolute;inset-inline-start:0;top:.55em;width:8px;height:8px;background:var(--acc)}
.stat-grid{display:grid;grid-template-columns:repeat(2,minmax(140px,240px));gap:16px}
.stat-grid.wide{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:28px}
.stat{background:var(--bg2);border:1px solid var(--line);border-radius:8px;padding:22px;display:flex;flex-direction:column;gap:6px;color:var(--txt2);font-size:14px}
.stat-n{font-size:40px;font-weight:600;color:var(--acc)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;margin-top:24px}
.step{background:var(--bg2);border:1px solid var(--line);border-radius:8px;padding:20px}
.step-n{color:var(--acc);font-weight:700;font-size:14px}
.step h3{font-size:17px;margin:8px 0 6px}
.step p{color:var(--txt3);font-size:13px}

/* markets */
.markets-strip{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 40px;display:flex;gap:20px;align-items:center;justify-content:center;flex-wrap:wrap;text-align:center}
.mk-label{color:var(--txt3);font-size:12px;font-weight:700;letter-spacing:2px}

/* inquiry */
.inquiry{max-width:var(--maxw);margin:0 auto;padding:72px 40px;display:flex;gap:56px;flex-wrap:wrap;border-top:1px solid var(--line)}
.inq-left{flex:1;min-width:300px}
.inq-left h2{font-size:40px;line-height:1.1;margin-bottom:16px}
.inq-left .muted{max-width:480px;margin-bottom:24px}
.contact-row{display:flex;gap:14px;margin-bottom:16px}
.lbl{display:block;color:var(--txt3);font-size:12px;font-weight:700;letter-spacing:1px}
.contact-row strong{font-size:20px}
.quote-form{width:100%;max-width:520px;background:var(--bg2);border:1px solid var(--line);border-radius:8px;padding:28px;display:flex;flex-direction:column;gap:13px}
.quote-form label{display:flex;flex-direction:column;gap:6px;font-size:11px;font-weight:700;letter-spacing:1px;color:var(--txt3)}
.quote-form input,.quote-form textarea{background:var(--bg);border:1px solid var(--line);color:var(--txt);padding:11px 13px;border-radius:4px;font:inherit;font-size:14px;font-weight:400;letter-spacing:0}
.quote-form input:focus,.quote-form textarea:focus{outline:none;border-color:var(--acc)}
.form-note{color:var(--txt3);font-size:12px;font-weight:400;letter-spacing:0}
.form-msg{font-size:14px;font-weight:600;letter-spacing:0}
.form-msg.ok{color:var(--acc)}
.form-msg.err{color:#FF6B6B}

/* product detail */
.pd{max-width:var(--maxw);margin:0 auto;padding:56px 40px;display:flex;gap:48px;flex-wrap:wrap}
.pd-img{width:42%;min-width:320px;position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#2E2E2E}
#pdMain{width:100%;display:block;aspect-ratio:1/1;object-fit:cover}
.pd-thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.pd-thumb{width:64px;height:64px;object-fit:cover;border-radius:6px;border:2px solid var(--line);cursor:pointer;background:#2E2E2E}
.pd-thumb.active{border-color:var(--acc)}
.article-cover{max-width:760px;width:100%;border-radius:10px;border:1px solid var(--line);margin:18px 0}
.pd-info{flex:1;min-width:320px}
.pd-info h1{font-size:34px;margin:10px 0 6px}
.pd-desc{color:var(--txt2);margin:16px 0 22px}
.pd-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.pd-info h3{font-size:18px;margin:22px 0 10px;color:var(--acc)}
.spec-table{width:100%;border-collapse:collapse}
.spec-table td{border:1px solid var(--line);padding:9px 12px;font-size:14px}
.spec-table td:first-child{color:var(--txt3);width:32%}
.back{color:var(--txt3);font-size:14px}

/* news */
.ngrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.article-body p{margin-bottom:14px;color:var(--txt2);max-width:760px}
.about-p{color:var(--txt2);max-width:760px;margin:14px 0 8px}
.about-block{margin-top:36px}

/* footer */
.site-footer{background:var(--bg3);border-top:1px solid var(--line);padding:52px 40px 28px;margin-top:24px}
.f-top{max-width:var(--maxw);margin:0 auto;display:flex;gap:40px;justify-content:space-between;flex-wrap:wrap}
.f-brand{max-width:340px}
.f-brand p{color:var(--txt3);font-size:14px;margin-top:14px}
.f-col{display:flex;flex-direction:column;gap:10px;min-width:150px}
.f-col h4{font-size:12px;letter-spacing:2px;margin-bottom:4px}
.f-col a{color:var(--txt3);font-size:14px}
.f-col a:hover{color:var(--acc)}
.f-bottom{max-width:var(--maxw);margin:36px auto 0;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#5A5A5A;font-size:13px}

/* whatsapp float */
.wa-float{position:fixed;bottom:24px;inset-inline-end:24px;width:56px;height:56px;border-radius:50%;background:var(--acc);color:var(--acc-dark);display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(0,0,0,.5);z-index:60}
.wa-float:hover{transform:scale(1.06)}

@media(max-width:860px){
  .hero{flex-direction:column;padding:40px 20px}
  .hero-img{width:100%}
  .navbar,.topbar{padding-inline:20px}
  .section,.inquiry,.pd{padding-inline:20px}
  .pd-img{width:100%}
  .hero h1{font-size:34px}
}

/* ---------- 图片灯箱（产品图放大） ---------- */
#lightbox{position:fixed;inset:0;z-index:9999;background:rgba(10,10,10,.96);overflow:hidden;animation:lbIn .18s ease}
@keyframes lbIn{from{opacity:0}to{opacity:1}}
.lb-top{position:absolute;top:0;left:0;right:0;z-index:2;display:flex;align-items:center;gap:14px;padding:14px 18px;background:linear-gradient(rgba(12,12,12,.85),rgba(12,12,12,0))}
.lb-count{font-family:Barlow,sans-serif;font-weight:600;font-size:15px;color:#9EFF00;min-width:52px}
.lb-hint{flex:1;font-size:12px;color:rgba(255,255,255,.55);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lb-btns{display:flex;gap:8px}
.lb-btn{width:38px;height:38px;border:1px solid rgba(255,255,255,.25);border-radius:8px;background:rgba(30,30,30,.8);color:#fff;font-size:17px;font-family:Barlow,sans-serif;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.15s}
.lb-btn:hover{border-color:#9EFF00;color:#9EFF00}
.lb-close{font-size:22px}
.lb-stage{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden}
.lb-img{max-width:92vw;max-height:82vh;user-select:none;-webkit-user-drag:none;touch-action:none;transition:transform .08s linear;will-change:transform}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:64px;border:none;border-radius:10px;background:rgba(30,30,30,.7);color:#fff;font-size:34px;line-height:1;cursor:pointer;z-index:2;transition:.15s}
.lb-nav:hover{background:rgba(158,255,0,.85);color:#111}
.lb-prev{left:12px}.lb-next{right:12px}
@media(max-width:760px){
  .lb-hint{display:none}
  .lb-nav{width:38px;height:56px;font-size:28px;opacity:.85}
  .lb-img{max-width:98vw;max-height:76vh}
}

/* ---------- 灯箱移动端适配：全屏 fixed 覆盖吸顶导航，预留安全区与操作条高度 ---------- */
.lb-top{padding-top:calc(14px + env(safe-area-inset-top))}
.lb-stage{padding-top:calc(76px + env(safe-area-inset-top));padding-bottom:24px;box-sizing:border-box}