/* TRD-04 建材五金 — building materials & hardware. Archivo, charcoal + safety orange. */
.tpl-trd-04{
  --gut:clamp(20px,5vw,72px);--max:1320px;--pad-x:max(var(--gut),calc((100% - var(--max))/2));
  --sans:"Archivo","Noto Sans SC",system-ui,sans-serif;
  --dock-bg:var(--fg);--dock-fg:var(--bg);
  font-family:var(--sans);font-size:16.5px;line-height:1.7;
}
.tpl-trd-04 main{overflow-x:clip}
.tpl-trd-04 h1,.tpl-trd-04 h2,.tpl-trd-04 h3{font-family:var(--sans);font-weight:800;letter-spacing:-.03em}
:lang(zh-Hans) .tpl-trd-04 h1,:lang(zh-Hans) .tpl-trd-04 h2,:lang(zh-Hans) .tpl-trd-04 h3{letter-spacing:0;font-weight:800}
.tpl-trd-04 ::selection{background:var(--accent);color:var(--on-accent)}
.h4-sec{padding:clamp(80px,10vw,144px) var(--pad-x) 0}

/* header */
.h4-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:4px 28px;padding:14px var(--pad-x);border-bottom:3px solid var(--fg)}
.h4-brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-size:17px;font-weight:800;letter-spacing:.02em;text-transform:uppercase;text-decoration:none}
.h4-brand:not(:has(img))::before{content:"";flex:none;width:14px;height:24px;background:var(--accent);transform:skewX(-14deg)}
.h4-nav{display:flex;flex-wrap:wrap}
.h4-nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;font-size:14.5px;font-weight:700;text-decoration:none;transition:background .15s,color .15s}
.h4-nav a:hover{background:var(--fg);color:var(--bg)}

/* buttons */
.h4-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;margin-top:34px}
.h4-btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:58px;padding:12px 30px;background:var(--accent);color:var(--on-accent);font-weight:800;font-size:16px;text-decoration:none;text-align:center;box-shadow:5px 5px 0 var(--fg);transition:transform .15s,box-shadow .15s}
.h4-btn::after{content:"↗"}
.h4-btn:hover{transform:translate(-2px,-2px);box-shadow:7px 7px 0 var(--fg)}
.h4-btn--dark{background:var(--on-accent);color:var(--accent);box-shadow:5px 5px 0 color-mix(in srgb,var(--on-accent) 35%,transparent)}
.h4-btn--dark:hover{box-shadow:7px 7px 0 color-mix(in srgb,var(--on-accent) 35%,transparent)}
.h4-link{display:inline-flex;align-items:center;min-height:44px;font-weight:800;text-decoration:underline;text-decoration-thickness:3px;text-decoration-color:var(--accent);text-underline-offset:6px}

/* hero */
.h4-main>.h4-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(40px,5vw,80px);align-items:center;padding:clamp(48px,6vw,96px) var(--pad-x) clamp(64px,7vw,104px)}
.h4-hero--text{grid-template-columns:minmax(0,1fr)!important}
.h4-eyebrow{display:inline-block;margin:0 0 26px;padding:6px 12px;background:var(--fg);color:var(--bg);font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase}
.h4-hero h1{font-size:clamp(48px,7.2vw,116px);line-height:.95;letter-spacing:-.045em}
:lang(zh-Hans) .h4-hero h1{font-size:clamp(42px,6vw,96px);line-height:1.12;letter-spacing:-.01em}
.h4-sub{margin-top:28px;max-width:28em;font-size:clamp(16.5px,1.3vw,19px);color:var(--muted)}
.h4-sub p:last-child{margin:0}
.h4-hero-art{position:relative;padding:0 clamp(14px,1.6vw,24px) clamp(14px,1.6vw,24px) 0}
.h4-hero-art::before{content:"";position:absolute;left:clamp(14px,1.6vw,24px);top:clamp(14px,1.6vw,24px);right:0;bottom:0;background:var(--accent)}
.h4-hero-ph{position:relative;margin:0;overflow:hidden}
.h4-hero-ph img{width:100%;aspect-ratio:4/5;object-fit:cover}

/* ticker */
.h4-ticker{background:var(--fg);color:var(--bg);padding:18px 0;font-size:clamp(17px,1.6vw,22px);font-weight:800}
.h4-ticker b{font-weight:800}
.h4-ticker i{display:inline-block;width:12px;height:12px;align-self:center;background:var(--accent);transform:rotate(45deg)}

/* section heads */
.h4-head{max-width:46rem;margin-bottom:clamp(36px,4.5vw,60px)}
.h4-k{display:flex;align-items:center;gap:10px;margin:0 0 14px;font-size:13px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
.h4-k::before{content:"";width:22px;height:6px;background:var(--accent)}
.h4-main h2{font-size:clamp(34px,4.6vw,68px);line-height:1;letter-spacing:-.04em}
:lang(zh-Hans) .h4-main h2{line-height:1.2;letter-spacing:-.005em}
.h4-intro{margin-top:18px;max-width:32em;font-size:17px;color:var(--muted)}
.h4-intro p:last-child{margin:0}

/* services: catalogue grid */
.h4-cat{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border:2px solid var(--fg)}
.h4-tile{position:relative;display:flex;flex-direction:column;min-height:clamp(240px,22vw,300px);padding:clamp(22px,2.4vw,32px);border-right:2px solid var(--fg);border-bottom:2px solid var(--fg);margin:0 -2px -2px 0;transition:background .2s,color .2s}
.h4-tile:hover{background:var(--accent);color:var(--on-accent)}
.h4-tile-n{font-size:clamp(40px,4vw,60px);font-weight:800;line-height:1;letter-spacing:-.05em;color:transparent;-webkit-text-stroke:1.5px var(--fg);margin-bottom:auto;padding-bottom:28px}
.h4-tile h3{font-size:clamp(21px,1.9vw,27px);line-height:1.25;margin-bottom:8px}
.h4-tile-d{font-size:15.5px;color:var(--muted)}
.h4-tile:hover .h4-tile-d{color:inherit}
.h4-tile:hover .h4-tile-n{-webkit-text-stroke-color:var(--on-accent)}
.h4-tile-d p{margin:0}
.h4-price{margin:10px 0 0;font-weight:800}
.h4-ask{align-self:flex-start;display:inline-flex;align-items:center;min-height:44px;margin-top:10px;font-weight:800;font-size:14.5px;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:5px}

/* about: inverted order band */
.h4-about{margin-top:clamp(80px,10vw,144px);background:var(--fg);color:var(--bg)}
.h4-about-in{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:48px clamp(48px,7vw,112px);align-items:start;padding:clamp(72px,9vw,128px) var(--pad-x)}
.h4-about-in--text{grid-template-columns:minmax(0,1fr)}
.h4-about .h4-k{color:var(--bg)}
.h4-about-ph{margin:0;overflow:hidden;border-bottom:8px solid var(--accent)}
.h4-about-ph img{width:100%;aspect-ratio:4/3;object-fit:cover}
.h4-steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:2px solid var(--bg)}
.h4-steps li{padding:28px 24px 36px 0;border-bottom:1px solid color-mix(in srgb,var(--bg) 25%,transparent)}
.h4-steps li:nth-child(odd){padding-right:28px;border-right:1px solid color-mix(in srgb,var(--bg) 25%,transparent)}
.h4-steps li:nth-child(even){padding-left:28px}
.h4-step-n{display:block;font-size:clamp(64px,7vw,104px);font-weight:800;line-height:.9;letter-spacing:-.06em;color:var(--accent);margin-bottom:22px}
.h4-steps p{margin:0;font-size:clamp(18px,1.6vw,22px);font-weight:700;line-height:1.45}
.h4-about-body{font-size:clamp(18px,1.6vw,21px)}

/* gallery */
.h4-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.h4-pic{position:relative;margin:0}
.h4-pic-ph{overflow:hidden}
.h4-pic img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s}
.h4-pic:hover img{transform:scale(1.03)}
.h4-pic figcaption{position:absolute;left:0;bottom:0;display:flex;gap:10px;align-items:center;padding:10px 16px;background:var(--bg);font-weight:800;font-size:14.5px}
.h4-pic figcaption span{color:var(--muted);font-weight:700}

/* testimonials */
.h4-quote-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:0;border:2px solid var(--fg)}
.h4-quote-list figure{padding:clamp(26px,3vw,38px);border-right:2px solid var(--fg);margin-right:-2px}
.h4-quote-list blockquote{font-size:clamp(18px,1.5vw,21px);font-weight:600;line-height:1.55}
.h4-quote-list blockquote p:last-child{margin:0}
.h4-quote-list figcaption{margin-top:16px;font-size:14px;font-weight:800}
.h4-quote-list figcaption span{color:var(--muted);font-weight:500}

/* faq */
.h4-faq{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:24px clamp(40px,7vw,112px);align-items:start}
.h4-faq-list{border-top:3px solid var(--fg)}
.h4-faq-list details{border-bottom:1px solid var(--line)}
.h4-faq-list summary{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:76px;padding:18px 0;font-weight:800;font-size:clamp(17px,1.4vw,20px);line-height:1.4}
.h4-faq-list summary::after{flex:none;display:grid;place-items:center;width:38px;height:38px;margin:0;background:var(--fg);color:var(--bg);font-size:22px;line-height:1}
.h4-faq-list details[open] summary::after{background:var(--accent);color:var(--on-accent)}
.h4-faq-list details p{margin:0 0 24px;color:var(--muted);max-width:40em}

/* contact */
.h4-contact{padding:clamp(80px,10vw,144px) 0 0}
.h4-contact-in{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:40px clamp(40px,6vw,96px);align-items:end;padding:clamp(56px,7vw,104px) var(--pad-x);background:var(--accent);color:var(--on-accent)}
.h4-contact .h4-k{color:var(--on-accent)}
.h4-contact .h4-k::before{background:var(--on-accent)}
.h4-contact h2{font-size:clamp(38px,5.6vw,84px);margin-bottom:22px}
.h4-contact-intro{font-size:17.5px;font-weight:500;max-width:30em;margin-bottom:34px}
.h4-contact-intro p:last-child{margin:0}
.h4-contact-list{border-top:3px solid var(--on-accent)}
.h4-contact-list li{padding:14px 0;border-bottom:1px solid color-mix(in srgb,var(--on-accent) 30%,transparent)}
.h4-contact-list .bc-k{font-weight:700;opacity:.8;font-size:11.5px;letter-spacing:.16em}
.h4-contact-list a{display:inline-flex;align-items:center;min-height:44px;margin:-6px 0;font-size:19px;font-weight:800;text-decoration:none}
.h4-contact-list span a{font-size:15px;text-decoration:underline}
.h4-social{display:flex;flex-wrap:wrap;gap:4px 18px;padding-top:8px}
.h4-social a{display:inline-flex;align-items:center;min-height:44px;font-weight:800;font-size:14.5px}

/* footer */
.h4-foot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px 24px;padding:24px var(--pad-x) 40px;background:var(--fg);color:var(--bg);font-size:13.5px}
.h4-foot-brand{font-weight:800;text-transform:uppercase;letter-spacing:.04em}

@media (max-width:1000px){
  .h4-cat{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .h4-main>.h4-hero,.h4-about-in,.h4-faq,.h4-contact-in{grid-template-columns:minmax(0,1fr)}
  .h4-hero-art{max-width:560px}
  .h4-hero-ph img{aspect-ratio:4/3}
}
@media (max-width:700px){
  .h4-top{padding-block:10px 4px}
  .h4-nav{width:calc(100% + 16px);margin:0 -8px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
  .h4-nav a{flex:none;padding:0 10px;font-size:14px}
  .h4-actions>.h4-btn{flex:1 1 100%;margin-right:5px}
  .h4-cat{grid-template-columns:minmax(0,1fr)}
  .h4-tile{min-height:0}
  .h4-tile-n{padding-bottom:18px;font-size:44px}
  .h4-steps{grid-template-columns:minmax(0,1fr)}
  .h4-steps li:nth-child(n){padding:22px 0 26px;border-right:0}
  .h4-step-n{font-size:56px;margin-bottom:12px}
  .h4-grid{grid-template-columns:minmax(0,1fr)}
  .h4-pic figcaption{font-size:13.5px}
  .h4-contact-in{padding-block:56px 40px}
}