/* HaiGuang Fasteners — brand-new static theme (2026).
   Deep steel navy + industrial orange. No legacy styles reused. */
:root{
  --navy:#12324f; --navy-2:#0c2438; --ink:#1e2a36; --muted:#5d6f7f;
  --line:#e2e8ee; --bg:#f4f6f8; --card:#ffffff;
  --accent:#e8720c; --accent-2:#c85e04;
  --ok:#1d7a3a; --radius:10px;
  --shadow:0 2px 10px rgba(18,50,79,.08);
  --font:"Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);font-size:16px;line-height:1.65}
img{max-width:100%;height:auto}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--accent-2)}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* top utility strip */
.strip{background:var(--navy-2);color:#c9d6e2;font-size:13px}
.strip .wrap{display:flex;justify-content:space-between;gap:12px;padding-top:7px;padding-bottom:7px;flex-wrap:wrap}
.strip a{color:#fff}
.strip a:hover{color:#ffd9ad}

/* header */
.site-head{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;box-shadow:0 1px 6px rgba(12,36,56,.06)}
.head-in{display:flex;align-items:center;gap:18px;padding:12px 20px}
.brand{display:flex;align-items:center;gap:12px;margin-right:auto}
.brand-logo{width:52px;height:52px;border-radius:50%;flex:none;display:block}
.foot-logo{width:56px;height:56px;border-radius:50%;display:block;margin-bottom:10px}
.brand b{display:block;font-size:19px;letter-spacing:.4px;color:var(--navy);line-height:1.2}
.brand small{display:block;font-size:11.5px;color:var(--muted);letter-spacing:.2px}
nav.main{display:flex;gap:4px;align-items:center}
nav.main a{padding:9px 14px;border-radius:7px;font-weight:600;font-size:15px;color:var(--ink);white-space:nowrap}
nav.main a:hover{background:#eef3f7;color:var(--navy)}
nav.main a.active{background:var(--navy);color:#fff}
.burger{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;font-size:20px;padding:6px 12px;cursor:pointer;color:var(--navy)}

/* hero */
.hero{background:linear-gradient(120deg,var(--navy-2) 0%,var(--navy) 55%,#1d4e7c 100%);color:#fff;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center;padding:46px 20px}
.hero h1{margin:.1em 0 .3em;font-size:clamp(28px,4vw,44px);line-height:1.15;letter-spacing:.3px}
.hero h1 span{color:#ffb25e}
.hero p.lead{color:#d7e3ee;font-size:17px;max-width:56ch}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0 24px}
.hero-badges span{border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:5px 14px;font-size:13.5px;color:#eef4fa}
.btn{display:inline-block;border-radius:8px;padding:11px 24px;font-weight:700;font-size:15.5px;border:1px solid transparent;cursor:pointer}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-2);color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2);color:#fff}
.slider{position:relative;border-radius:14px;overflow:hidden;box-shadow:0 12px 34px rgba(0,0,0,.35);background:#0a1c2c;aspect-ratio:4/3.4}
.slider img.slide{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .6s ease}
.slider img.slide.on{opacity:1}
.slider .dots{position:absolute;left:0;right:0;bottom:10px;display:flex;gap:7px;justify-content:center}
.slider .dots button{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.45);cursor:pointer;padding:0}
.slider .dots button.on{background:var(--accent)}

/* sections */
.section{padding:52px 0}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:baseline;gap:14px;margin-bottom:6px;flex-wrap:wrap}
.sec-head h2{margin:0;font-size:26px;color:var(--navy);letter-spacing:.3px}
.sec-head .rule{flex:1;height:2px;background:linear-gradient(90deg,var(--accent),transparent);min-width:60px;align-self:center}
.sec-head a.more{font-size:14px;font-weight:700}
.sec-sub{color:var(--muted);margin:0 0 24px}

/* cards */
.grid{display:grid;gap:18px}
.grid.cats{grid-template-columns:repeat(4,1fr)}
.grid.prods{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;transition:transform .15s ease,box-shadow .15s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(18,50,79,.14)}
.card .thumb{background:#fff;aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;overflow:hidden;border-bottom:1px solid var(--line);padding:10px}
.card .thumb img{max-height:100%;max-width:100%;width:auto;object-fit:contain}
.card .body{padding:13px 15px 15px;display:flex;flex-direction:column;gap:6px;flex:1}
.card .kicker{font-size:12px;font-weight:700;color:var(--accent-2);text-transform:uppercase;letter-spacing:.6px}
.card h3{margin:0;font-size:15.5px;line-height:1.4;color:var(--navy)}
.card h3 a{color:inherit}
.card .code{font-size:13px;color:var(--muted)}
.card .go{margin-top:auto;padding-top:8px;font-size:13.5px;font-weight:700;color:var(--accent-2)}
.cat-card{padding:20px}
.cat-card h3{font-size:17px;margin:0 0 4px}
.cat-card .n{font-size:13px;color:var(--muted)}
.cat-card ul{margin:10px 0 0;padding:0;list-style:none;font-size:14px}
.cat-card li{padding:3px 0;border-top:1px dashed var(--line)}
.cat-card li:first-child{border-top:0}

/* breadcrumb + page head */
.crumbs{font-size:13.5px;color:var(--muted);padding:16px 0 0}
.crumbs a{color:var(--navy)}
.page-head{background:#fff;border-bottom:1px solid var(--line)}
.page-head .wrap{padding-top:26px;padding-bottom:22px}
.page-head h1{margin:0 0 6px;font-size:30px;color:var(--navy)}
.page-head p{margin:0;color:var(--muted)}

/* product detail */
.detail{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:30px;align-items:start}
.detail .photo{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow);position:sticky;top:150px}
.detail .photo img{width:100%;object-fit:contain}
.spec-box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:var(--shadow)}
.spec-box h1{font-size:24px;color:var(--navy);margin:0 0 4px}
.spec-box .code{color:var(--accent-2);font-weight:700;margin-bottom:12px}
.kv{display:grid;grid-template-columns:130px 1fr;gap:8px 14px;font-size:14.5px;margin:14px 0;padding:14px;background:var(--bg);border-radius:8px}
.kv dt{color:var(--muted)} .kv dd{margin:0}
.spec-table{overflow-x:auto;margin-top:14px}
.spec-table table{border-collapse:collapse;width:100%;font-size:13.5px}
.spec-table table,.spec-table td,.spec-table th{border:1px solid #b9c6d2 !important}
.spec-table td,.spec-table th{padding:6px 9px;background:#fff !important;color:var(--ink) !important}
.spec-table span{color:inherit !important}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}

/* tables generic */
table.clean{border-collapse:collapse;width:100%}
table.clean td,table.clean th{border:1px solid var(--line);padding:8px 10px}

/* about / contact */
.prose{background:#fff;border:1px solid var(--line);border-radius:12px;padding:30px;box-shadow:var(--shadow)}
.prose h2{color:var(--navy)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:var(--shadow)}
.contact-card h3{margin-top:0;color:var(--navy)}
.contact-card li{margin-bottom:8px}

/* forms */
.form{background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px;box-shadow:var(--shadow);max-width:760px}
.form label{display:block;font-weight:600;margin:14px 0 5px}
.form input,.form select,.form textarea{width:100%;border:1px solid #c3cfd9;border-radius:7px;padding:10px 12px;font-size:15px;font-family:inherit}
.form input:focus,.form textarea:focus,.form select:focus{outline:2px solid var(--accent);border-color:var(--accent)}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form .err{color:#b3261e;font-size:13.5px;min-height:1.2em}

/* footer */
footer{background:var(--navy-2);color:#c9d6e2;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:26px;padding:40px 20px}
footer h4{color:#fff;margin:0 0 12px;font-size:16px}
footer ul{list-style:none;margin:0;padding:0;font-size:14px}
footer li{margin-bottom:7px}
footer a{color:#c9d6e2} footer a:hover{color:#ffb25e}
.foot-base{border-top:1px solid rgba(255,255,255,.14);font-size:13px}
.foot-base .wrap{display:flex;justify-content:space-between;gap:10px;padding-top:14px;padding-bottom:16px;flex-wrap:wrap}

/* about page: oversized brand logo showcase */
.brand-hero{background:linear-gradient(135deg,var(--navy-2) 0%,var(--navy) 60%,#1d4e7c 100%);color:#fff;padding:52px 0}
.brand-hero-in{display:grid;grid-template-columns:auto 1fr;gap:46px;align-items:center}
.brand-hero-logo{border-radius:50%;padding:18px;box-shadow:0 18px 46px rgba(0,0,0,.42);display:flex}
.brand-hero-logo img{width:300px;height:300px;display:block;border-radius:50%}
.brand-hero-txt .eyebrow{margin:0;color:#ffb25e;font-size:13px;font-weight:700;letter-spacing:2.4px;text-transform:uppercase}
.brand-hero-txt h2{margin:8px 0 10px;font-size:clamp(26px,3.4vw,40px);letter-spacing:1px;color:#fff}
.brand-hero-txt .lede{margin:0 0 10px;font-size:18px;color:#e6eef6;font-weight:600;line-height:1.55}
.brand-hero-txt .sec-sub{color:#c3d3e2;margin:0 0 16px;max-width:62ch}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips span{border:1px solid rgba(255,255,255,.34);border-radius:999px;padding:6px 15px;font-size:13.5px;color:#eaf1f8}


/* ---- nav dropdown + CTA ---- */
nav.main .has-drop{position:relative}
nav.main .has-drop>.drop{position:absolute;left:0;top:100%;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 12px 30px rgba(18,50,79,.16);padding:8px;min-width:250px;display:none;z-index:60}
nav.main .has-drop:hover>.drop,nav.main .has-drop:focus-within>.drop{display:block}
nav.main .has-drop>.drop a{display:block;padding:8px 12px;border-radius:7px;font-weight:600;font-size:14.5px;white-space:nowrap}
nav.main .has-drop>.drop a:hover{background:#eef3f7}
nav.main .has-drop>.drop .drop-all{border-top:1px solid var(--line);margin-top:6px;padding-top:10px;color:var(--accent-2)}
nav.main a.nav-cta{background:var(--accent);color:#fff;margin-left:4px}
nav.main a.nav-cta:hover{background:var(--accent-2);color:#fff}
nav.main a.nav-tel{color:var(--accent-2);font-weight:700}
.brand b{white-space:nowrap}
.brand small{white-space:nowrap}

/* misc */
.notice{background:#fff8ec;border:1px solid #f0c98a;border-radius:10px;padding:16px 18px;color:#7a4a00}
.toolbar{display:flex;gap:12px;align-items:center;margin:0 0 18px;flex-wrap:wrap}
.toolbar input[type=search]{flex:1;min-width:220px;border:1px solid #c3cfd9;border-radius:8px;padding:10px 14px;font-size:15px}
.pill{display:inline-block;background:#e8eef4;color:var(--navy);border-radius:999px;padding:3px 12px;font-size:13px;font-weight:600}
.totop{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:50%;border:0;background:var(--navy);color:#fff;font-size:20px;cursor:pointer;display:none;box-shadow:0 4px 14px rgba(0,0,0,.3)}
.totop.show{display:block}

/* responsive */
@media(max-width:1020px){
  .grid.cats,.grid.prods{grid-template-columns:repeat(3,1fr)}
  .hero-grid{grid-template-columns:1fr}
  .brand-hero-in{grid-template-columns:1fr;gap:28px;text-align:center;justify-items:center}
  .brand-hero-logo img{width:210px;height:210px}
  .chips{justify-content:center}
  .detail{grid-template-columns:1fr}
  .detail .photo{position:static}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  nav.main{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 16px 16px;border-bottom:1px solid var(--line)}
  nav.main.open{display:flex}
  .site-head{position:sticky}
  .head-in{position:relative}
  .burger{display:block}
  .grid.cats,.grid.prods{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .form .row2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .section{padding:36px 0}
}
@media(max-width:460px){.grid.prods{grid-template-columns:1fr 1fr}.card h3{font-size:14px}}

/* ---- category chips ---- */
.chips-row{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}
.chip{display:inline-block;border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 15px;font-size:14px;font-weight:600;color:var(--ink)}
.chip:hover{border-color:var(--accent);color:var(--accent-2)}
.chip.on{background:var(--navy);border-color:var(--navy);color:#fff}
/* ---- pagination ---- */
.pager{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-top:28px}
.pager a,.pager span{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 14px;font-size:14.5px;font-weight:600;color:var(--ink);min-width:42px;text-align:center}
.pager a:hover{border-color:var(--accent);color:var(--accent-2)}
.pager .cur{background:var(--navy);border-color:var(--navy);color:#fff}