/* HEBEI HONGFENG TRADE CO.,LTD — Hot-dip galvanized steel pipe
   Design system: bright product-catalogue style (white / zinc blue / safety yellow).
   Intentionally different from both the GAOYANG site and the seamless-pipe site. */

:root{
  --white:#fff;
  --ice:#f2f7fc;
  --ice-2:#e8f1fa;
  --ink:#0e2742;
  --ink-2:#1d4368;
  --mut:#66798f;
  --blue:#0a63f0;
  --blue-dark:#0750c4;
  --yellow:#ffc61a;
  --yellow-dark:#e0a800;
  --zinc:#8fa6b8;
  --line:#dbe6f1;
  --radius:16px;
  --shadow:0 10px 30px rgba(14,39,66,.08);
  --wrap:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--white);color:var(--ink);
  font-family:"Inter","Segoe UI",Roboto,-apple-system,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
h1,h2,h3,h4{margin:0 0 12px;line-height:1.18;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(32px,4.6vw,54px);font-weight:800}
h2{font-size:clamp(25px,3.2vw,38px);font-weight:800}
h3{font-size:19px;font-weight:750}
p{margin:0 0 14px;color:#3f556e}
.muted{color:var(--mut)}
.eyebrow{display:inline-block;background:var(--ice-2);color:var(--blue);font-size:12.5px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;padding:7px 13px;border-radius:999px;margin-bottom:16px}

/* ---------- top strip + header ---------- */
.strip{background:linear-gradient(90deg,var(--blue),#0a8ef0);color:#fff;font-size:13.6px;font-weight:600}
.strip .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;height:42px}
.strip a{text-decoration:underline;text-underline-offset:3px}
header.top{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;gap:24px;height:74px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;white-space:nowrap}
.brand .mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--blue),#0a8ef0);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:800;box-shadow:0 6px 16px rgba(10,99,240,.28)}
.brand small{display:block;font-size:10.5px;letter-spacing:.14em;color:var(--mut);font-weight:700}
nav.main{margin-left:auto;display:flex;gap:20px;font-size:15px;font-weight:600}
nav.main a{color:#38506c;padding:6px 0;border-bottom:2px solid transparent}
nav.main a:hover{color:var(--blue);border-color:var(--blue)}
.head-cta{display:flex;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 20px;border-radius:11px;font-weight:800;font-size:14.8px;border:1px solid transparent;transition:.16s;white-space:nowrap;cursor:pointer}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-dark)}
.btn-yellow{background:var(--yellow);color:#3d2c00}
.btn-yellow:hover{background:var(--yellow-dark)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-wa{background:#25d366;color:#05301a}
.btn-wa:hover{background:#1eb457}
.menu-toggle{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:9px 12px;font-size:16px}

/* ---------- hero ---------- */
.hero{background:linear-gradient(180deg,var(--ice) 0%,#fff 100%);border-bottom:1px solid var(--line);padding:54px 0 62px}
.hero .grid-2{display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center}
.hero h1 span{color:var(--blue)}
.hero .lead{font-size:18px;color:#3d5a78;max-width:600px}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin:22px 0 26px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 15px;font-weight:700;font-size:14px;color:#27476a;box-shadow:0 2px 8px rgba(14,39,66,.05)}
.chip.hot{background:var(--yellow);border-color:var(--yellow);color:#3d2c00}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-media{position:relative;border-radius:22px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}
.hero-media img{width:100%;height:430px;object-fit:cover}
.float-card{position:absolute;left:18px;bottom:18px;right:18px;background:rgba(255,255,255,.95);border-radius:14px;padding:14px 16px;display:flex;gap:14px;align-items:center;box-shadow:0 10px 24px rgba(14,39,66,.16)}
.float-card .k{font-weight:800;font-size:15px}
.float-card .v{font-size:13.4px;color:var(--mut)}

/* ---------- trust row ---------- */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-top:-32px;position:relative;z-index:5;padding:20px}
.trust .t{display:flex;gap:12px;align-items:flex-start}
.trust .ico{width:38px;height:38px;flex:0 0 38px;border-radius:11px;background:var(--ice-2);color:var(--blue);display:grid;place-items:center;font-weight:800;font-size:13px}
.trust b{display:block;font-size:15px}
.trust span{font-size:13.4px;color:var(--mut)}

/* ---------- sections ---------- */
section{padding:74px 0}
section.tight{padding:52px 0}
.ice{background:var(--ice);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.head{max-width:720px;margin-bottom:36px}

/* ---------- product tiles ---------- */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tile{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;box-shadow:0 4px 16px rgba(14,39,66,.05);transition:.2s}
.tile:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(14,39,66,.12)}
.tile .ph{position:relative;aspect-ratio:4/3;background:var(--ice);overflow:hidden}
.tile .ph img{width:100%;height:100%;object-fit:cover;transition:.4s}
.tile:hover .ph img{transform:scale(1.06)}
.tile .badge{position:absolute;left:12px;top:12px;background:var(--yellow);color:#3d2c00;font-weight:800;font-size:12px;padding:6px 11px;border-radius:999px}
.tile .bd{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.tile h3{margin-bottom:6px}
.tile .sub{font-size:13.6px;color:var(--mut);margin-bottom:12px}
.tile ul{list-style:none;padding:0;margin:0 0 16px}
.tile li{position:relative;padding-left:22px;font-size:14.4px;margin-bottom:7px;color:#3f556e}
.tile li::before{content:"✓";position:absolute;left:0;color:var(--blue);font-weight:800}
.tile .cta{margin-top:auto;display:flex;gap:10px;align-items:center}
.tile .cta a.btn{flex:1;padding:10px 14px;font-size:14px}

/* ---------- size table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:0 4px 16px rgba(14,39,66,.05)}
table{width:100%;border-collapse:collapse;font-size:14.8px;min-width:660px}
th,td{padding:12px 15px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--ice-2);color:var(--ink);font-weight:800;font-size:13px;letter-spacing:.04em;text-transform:uppercase}
tbody tr:hover{background:#f7fbff}
td code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13.4px;color:#1d4368}

/* ---------- applications ---------- */
.apps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.app{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 4px 14px rgba(14,39,66,.05)}
.app .ic{width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,var(--blue),#0a8ef0);color:#fff;display:grid;place-items:center;font-size:15px;font-weight:800;margin-bottom:14px}
.app h3{font-size:17.4px;margin-bottom:6px}
.app p{font-size:14.4px;margin:0;color:#4b6482}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.pstep{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:relative}
.pstep::before{counter-increment:s;content:counter(s);width:34px;height:34px;border-radius:50%;background:var(--yellow);color:#3d2c00;font-weight:800;display:grid;place-items:center;margin-bottom:14px}
.pstep h4{font-size:16.4px;margin-bottom:6px}
.pstep p{font-size:14.2px;margin:0;color:var(--mut)}

/* ---------- gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gallery figure{margin:0;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#fff}
.gallery img{width:100%;height:220px;object-fit:cover}
.gallery figcaption{padding:11px 14px;font-size:13.4px;color:var(--mut)}

/* ---------- faq ---------- */
details.faq{background:#fff;border:1px solid var(--line);border-radius:13px;padding:17px 20px;margin-bottom:11px;box-shadow:0 3px 12px rgba(14,39,66,.04)}
details.faq summary{cursor:pointer;font-weight:750;font-size:15.8px;list-style:none;color:var(--ink)}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";float:right;color:var(--blue);font-weight:800}
details.faq[open] summary::after{content:"–"}
details.faq p{margin:12px 0 0;font-size:14.8px;color:#4b6482}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px}
form.inquiry{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
form.inquiry label{display:block;font-size:13.4px;color:var(--mut);font-weight:700;margin:0 0 6px}
form.inquiry input,form.inquiry select,form.inquiry textarea{width:100%;padding:12px 13px;margin-bottom:15px;border-radius:11px;border:1px solid var(--line);background:#fafcfe;color:var(--ink);font:inherit;font-size:14.8px}
form.inquiry textarea{min-height:116px;resize:vertical}
form.inquiry input:focus,form.inquiry textarea:focus,form.inquiry select:focus{outline:none;border-color:var(--blue);background:#fff}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 4px 16px rgba(14,39,66,.05)}
.info-row{display:flex;gap:13px;align-items:flex-start;margin-bottom:16px;font-size:15.2px}
.info-row .ic{width:38px;height:38px;flex:0 0 38px;border-radius:12px;background:var(--ice-2);color:var(--blue);display:grid;place-items:center;font-weight:800;font-size:13px}
.size-note{background:var(--yellow);border-radius:14px;padding:18px 20px;font-size:14.6px;color:#3d2c00;font-weight:600}

/* ---------- footer ---------- */
footer{background:var(--ink);color:#c9d8e8;padding:54px 0 30px;font-size:14.6px}
footer h4{color:#fff;font-size:15px;margin-bottom:14px}
footer a:hover{color:var(--yellow)}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin-bottom:9px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px;margin-bottom:34px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.14);padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.6px;color:#9db2c8}
.float-wa{position:fixed;right:18px;bottom:18px;z-index:90;background:#25d366;color:#05301a;border-radius:999px;padding:13px 20px;font-weight:800;box-shadow:0 12px 28px rgba(37,211,102,.36);display:flex;align-items:center;gap:9px}

/* ---------- responsive ---------- */
@media (max-width:1040px){
  .hero .grid-2,.contact-grid{grid-template-columns:1fr}
  .tiles,.apps,.steps{grid-template-columns:repeat(2,1fr)}
  .trust{grid-template-columns:repeat(2,1fr);margin-top:0}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .hero-media img{height:340px}
}
@media (max-width:820px){
  nav.main{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:8px 22px;box-shadow:var(--shadow)}
  nav.main.open{display:flex}
  nav.main a{padding:13px 0;border-bottom:1px solid var(--line)}
  .menu-toggle{display:block}
  .head-cta{display:none}
  .strip .wrap{font-size:12.4px;height:auto;padding:8px 22px}
}
@media (max-width:620px){
  .tiles,.apps,.steps,.gallery,.trust,.two-col{grid-template-columns:1fr}
  section{padding:52px 0}
  .hero-media img{height:260px}
}