/* ============================================================
   MerForge — Scaffolding & Formwork Hardware
   Global Stylesheet v1.0
   Palette : Steel Navy #12395C · Deep #0B2440 · Orange #E8710A
             Light #F4F7FA · Ink #16222E · Slate #5A6B7A
   Supports: EN / 中文 / ES / AR (RTL) · Mobile-first responsive
   ============================================================ */

:root{
  --navy:#12395C; --navy-deep:#0B2440; --navy-soft:#1E5080;
  --orange:#E8710A; --orange-dark:#C95F05; --orange-soft:#FFF1E2;
  --light:#F4F7FA; --tint:#EEF3F8; --white:#FFFFFF;
  --ink:#16222E; --slate:#5A6B7A; --line:#E2E8F0;
  --ok:#0F8A4A; --err:#C0392B;
  --radius:14px; --radius-sm:10px;
  --shadow:0 6px 24px rgba(11,36,64,.08);
  --shadow-lg:0 16px 44px rgba(11,36,64,.14);
  --container:1220px;
  --font:"Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",
         Tahoma,Arial,"Noto Sans","Noto Sans Arabic",sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden;overflow-x:clip}
body{
  font-family:var(--font);font-size:17px;line-height:1.68;color:var(--ink);
  background:var(--white);overflow-x:hidden;overflow-x:clip;
}
body.nav-locked{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4{line-height:1.22;color:var(--navy);font-weight:800}
h1{font-size:clamp(32px,4.4vw,56px)}
h2{font-size:clamp(26px,3.1vw,42px)}
h3{font-size:clamp(19px,1.6vw,23px)}
h4{font-size:19px}
p{color:var(--slate)}
.container{max-width:var(--container);margin:0 auto;padding-inline:22px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- RTL ---------- */
[dir="rtl"] .nav-link::after{left:auto;right:0}
[dir="rtl"] .wa-float,.wa-float[dir-pos="end"]{}
/* 双向文本隔离：避免阿拉伯语环境下 "+8615920592749" 被显示成 "8615920592749+"、
   "48.3 × 3.2 mm" 被倒序成 "mm 3.2 × 48.3" 这类数字/计量错排。 */
[data-whatsapp-show],[data-email],[data-address]{unicode-bidi:isolate}
[data-whatsapp-show]{direction:ltr}
[dir="rtl"] table.spec th,[dir="rtl"] table.spec td,
[dir="rtl"] .pd-quick dt,[dir="rtl"] .pd-quick dd,
[dir="rtl"] .product-spec span,[dir="rtl"] .stat strong,
[dir="rtl"] .trade-card p,[dir="rtl"] .pd-proc-chip,
[dir="rtl"] .footer-cert span{unicode-bidi:plaintext}

/* ============================================================
   BUTTONS  (enlarged per brief)
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 32px;border-radius:11px;border:2px solid transparent;
  font-size:17.5px;font-weight:700;line-height:1.2;text-align:center;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s;
}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-dark);transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(232,113,10,.34)}
.btn--navy{background:var(--navy);color:#fff}
.btn--navy:hover{background:var(--navy-deep);transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(18,57,92,.28)}
.btn--outline{border-color:var(--navy);color:var(--navy);background:transparent}
.btn--outline:hover{background:var(--navy);color:#fff}
.btn--ghost{border-color:rgba(255,255,255,.6);color:#fff;background:rgba(255,255,255,.1)}
.btn--ghost:hover{background:rgba(255,255,255,.22);transform:translateY(-2px)}
.btn--wa{background:#25D366;color:#fff}
.btn--wa:hover{background:#1EBE5A;transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(37,211,102,.36)}
.btn--lg{padding:18px 40px;font-size:19px}
.btn--sm{padding:12px 22px;font-size:16px}
.btn--block{width:100%}
.btn-arrow{transition:transform .18s ease}
.btn:hover .btn-arrow{transform:translateX(5px)}
[dir="rtl"] .btn-arrow{transform:scaleX(-1)}
[dir="rtl"] .btn:hover .btn-arrow{transform:scaleX(-1) translateX(5px)}

/* ============================================================
   1. TOP BAR
   ============================================================ */
.topbar{background:var(--navy-deep);color:rgba(255,255,255,.86);font-size:14.5px}
.topbar-inner{display:flex;justify-content:space-between;align-items:center;
  min-height:42px;gap:18px;flex-wrap:wrap}
.topbar-left{display:flex;gap:26px;flex-wrap:wrap}
.topbar-item{display:inline-flex;align-items:center;gap:7px}
.topbar-item svg{width:15px;height:15px;fill:currentColor;opacity:.8}
.topbar a:hover{color:#fff;text-decoration:underline}

/* ============================================================
   2. HEADER
   ============================================================ */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:box-shadow .2s}
.header.is-scrolled{box-shadow:0 4px 20px rgba(11,36,64,.11)}
.header-inner{display:flex;align-items:center;justify-content:space-between;
  min-height:86px;gap:22px}
.brand{display:flex;align-items:center;gap:14px;flex-shrink:0}
.brand img{width:56px;height:56px;border-radius:14px;
  box-shadow:0 2px 10px rgba(11,36,64,.18)}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-name{font-size:26px;font-weight:800;color:var(--navy);letter-spacing:.2px}
.brand-name span{color:var(--orange)}
.brand-tag{font-size:11.5px;color:var(--slate);letter-spacing:1.5px;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:26px}
.nav-link{font-size:17px;font-weight:600;color:var(--ink);position:relative;padding:8px 0}
.nav-link::after{content:"";position:absolute;inset-inline-start:0;bottom:2px;width:0;
  height:3px;background:var(--orange);border-radius:2px;transition:width .22s ease}
.nav-link:hover{color:var(--navy)}
.nav-link:hover::after,.nav-link.is-active::after{width:100%}
.nav-link.is-active{color:var(--navy)}
.btn--nav{padding:12px 24px;font-size:16.5px}

/* language switch */
.lang{position:relative}
.lang-btn{display:inline-flex;align-items:center;gap:7px;background:var(--light);
  border:1px solid var(--line);border-radius:9px;padding:9px 14px;
  font-size:15.5px;font-weight:600;color:var(--navy)}
.lang-btn:hover{border-color:var(--navy-soft)}
.lang-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2}
.lang-menu{position:absolute;inset-inline-end:0;top:calc(100% + 8px);min-width:168px;
  background:#fff;border:1px solid var(--line);border-radius:11px;box-shadow:var(--shadow-lg);
  padding:7px;display:none;z-index:130}
.lang.is-open .lang-menu{display:block}
.lang-menu button{display:block;width:100%;text-align:start;background:none;border:0;
  padding:10px 13px;border-radius:8px;font-size:16px;color:var(--ink);font-weight:600}
.lang-menu button:hover{background:var(--light)}
.lang-menu button.is-active{background:var(--orange-soft);color:var(--orange-dark)}
.nav-toggle{display:none;background:none;border:0;width:46px;height:46px}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;width:26px;height:3px;background:var(--navy);border-radius:2px;
  margin:5px auto 0;content:"";transition:transform .2s ease,background .2s ease}
.nav-toggle span::before{transform:translateY(-8px)}
.nav-toggle span::after{transform:translateY(5px)}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{transform:rotate(45deg) translateY(0)}
.nav-toggle.is-open span::after{transform:rotate(-45deg) translateY(-3px)}

/* ============================================================
   3. HERO (homepage — light overlay, B2B info forward)
   ============================================================ */
.hero{position:relative;overflow:hidden;padding:86px 0 0;
  background:linear-gradient(180deg,#EAF1F8 0%,#F7FAFC 100%)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  object-position:center 38%}
.hero-mask{position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.93) 38%,
  rgba(240,246,251,.72) 62%,rgba(224,236,246,.34) 100%)}
.hero-inner{position:relative;z-index:2;display:grid;
  grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:52px;align-items:center;
  padding-bottom:82px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:14.5px;font-weight:800;
  letter-spacing:2.2px;text-transform:uppercase;color:var(--orange-dark);
  background:#fff;border:1px solid #FBD9B4;border-radius:999px;padding:8px 18px;
  margin-bottom:20px;box-shadow:var(--shadow)}
.hero-title{font-size:clamp(33px,4.3vw,56px);font-weight:800;color:var(--navy);margin-bottom:18px}
.hero-title em{font-style:normal;color:var(--orange);
  background:linear-gradient(180deg,transparent 62%,rgba(232,113,10,.2) 62%)}
.hero-sub{font-size:18.5px;color:#3E5062;max-width:640px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:15px;color:var(--slate);
  font-weight:600}
.hero-trust span{display:inline-flex;align-items:center;gap:7px}
.hero-trust span::before{content:"✓";color:var(--ok);font-weight:800}
.hero-panel{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);
  padding:30px 28px;border:1px solid var(--line)}
.hero-panel h3{font-size:20px;margin-bottom:6px}
.hero-panel p{font-size:15px;margin-bottom:18px}
.hero-panel-list{display:flex;flex-direction:column;gap:13px;margin-bottom:22px}
.hero-panel-list li{display:flex;gap:11px;align-items:flex-start;font-size:15.5px;
  color:var(--ink);font-weight:600}
.hero-panel-list li b{display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 26px;height:26px;border-radius:8px;background:var(--orange-soft);
  color:var(--orange-dark);font-size:14px}
.hero-stats-wrap{position:relative;z-index:3;margin-top:-40px}
.hero-stats{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;background:#fff;
  border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:26px 10px}
.stat{text-align:center;padding:0 8px;border-inline-end:1px solid var(--line)}
.stat:last-child{border-inline-end:0}
.stat strong{display:block;font-size:clamp(22px,2.4vw,32px);font-weight:800;
  color:var(--orange);line-height:1.12}
.stat span{font-size:14px;color:var(--slate);font-weight:600}

/* ============================================================
   4. PAGE HERO (inner pages)
   ============================================================ */
.page-hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-deep) 100%);
  color:#fff;padding:64px 0 60px;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset-inline-end:-120px;top:-120px;
  width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,113,10,.22),transparent 68%)}
.page-hero h1{color:#fff;margin-bottom:14px}
.page-hero p{color:rgba(255,255,255,.85);font-size:18px;max-width:760px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:9px;font-size:14.5px;
  color:rgba(255,255,255,.72);margin-bottom:18px}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.breadcrumb li::after{content:"/";margin-inline-start:9px;opacity:.5}
.breadcrumb li:last-child::after{content:""}

/* ============================================================
   5. SECTIONS
   ============================================================ */
.section{padding:88px 0}
.section--light{background:var(--light)}
.section--tint{background:var(--tint)}
.section--dark{background:linear-gradient(140deg,var(--navy) 0%,var(--navy-deep) 100%)}
.section--white{background:#fff}
.section--tight{padding:64px 0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;
  gap:32px;margin-bottom:50px;flex-wrap:wrap}
.section-head.center{flex-direction:column;align-items:center;text-align:center}
.section-head h2{margin-bottom:12px}
.section-head p{max-width:660px;font-size:17.5px}
.section-head-side{max-width:380px;font-size:16px}
.on-dark h2,.on-dark p{color:rgba(255,255,255,.92)}
.on-dark .eyebrow{color:#FFC08A}
.eyebrow{display:inline-block;font-size:13.5px;font-weight:800;letter-spacing:2.4px;
  text-transform:uppercase;color:var(--orange);margin-bottom:12px}
.section-cta{text-align:center;margin-top:48px}

/* ============================================================
   6. GRIDS & CARDS
   ============================================================ */
.grid{display:grid;gap:26px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

.why-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 28px;transition:transform .2s,box-shadow .2s;height:100%}
.why-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.why-ico{width:60px;height:60px;border-radius:15px;
  background:linear-gradient(135deg,#FFF1E2,#FFDFC2);display:flex;align-items:center;
  justify-content:center;font-size:27px;margin-bottom:18px}
.why-card h3{font-size:20px;margin-bottom:10px}
.why-card p{font-size:15.5px}

/* product cards */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,
  box-shadow .2s,border-color .2s}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#CFE0EE}
.product-media{aspect-ratio:1/1;overflow:hidden;background:#fff;
  border-bottom:1px solid var(--line);position:relative}
.product-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.product-card:hover .product-media img{transform:scale(1.06)}
.product-cat{position:absolute;top:14px;inset-inline-start:14px;background:rgba(18,57,92,.92);
  color:#fff;font-size:12.5px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;
  padding:6px 13px;border-radius:999px}
.product-body{padding:24px 24px 26px;display:flex;flex-direction:column;gap:9px;flex:1}
.product-body h3{font-size:21.5px}
.product-body p{font-size:15.5px;flex:1}
.product-spec{font-size:14px;color:var(--slate);border-top:1px dashed var(--line);
  padding-top:12px;display:flex;flex-direction:column;gap:5px}
.product-spec span b{color:var(--navy);font-weight:700}
.product-link{margin-top:6px;font-size:16.5px;font-weight:800;color:var(--orange);
  display:inline-flex;align-items:center;gap:8px}
.product-card:hover .product-link{gap:13px}

/* category chips */
.chips{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:44px;justify-content:center}
.chip{background:#fff;border:1.5px solid var(--line);border-radius:999px;
  padding:11px 24px;font-size:16px;font-weight:700;color:var(--navy);
  transition:.18s;display:inline-block}
.chip:hover,.chip.is-active{background:var(--navy);border-color:var(--navy);color:#fff}

/* ============================================================
   7. PRODUCT DETAIL
   ============================================================ */
.pd-top{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  gap:56px;align-items:start}
.pd-gallery{background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:22px;box-shadow:var(--shadow);position:sticky;top:106px}
.pd-main-img{border-radius:12px;overflow:hidden;background:#fff}
.pd-main-img img{width:100%;aspect-ratio:1/1;object-fit:cover}
.pd-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:11px;margin-top:14px}
.pd-thumbs button{border:2px solid var(--line);border-radius:10px;overflow:hidden;
  background:#fff;padding:0;aspect-ratio:1/1}
.pd-thumbs button.is-active{border-color:var(--orange)}
.pd-thumbs img{width:100%;height:100%;object-fit:cover}
.pd-info h1{font-size:clamp(28px,3.2vw,42px);margin-bottom:14px}
.pd-cat{display:inline-block;background:var(--orange-soft);color:var(--orange-dark);
  font-size:13.5px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase;
  padding:7px 16px;border-radius:999px;margin-bottom:16px}
.pd-lead{font-size:18px;color:#3E5062;margin-bottom:22px}
.pd-quick{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:24px}
.pd-quick div{background:var(--light);border-radius:11px;padding:14px 16px;
  border:1px solid var(--line)}
.pd-quick dt{font-size:13px;color:var(--slate);font-weight:700;text-transform:uppercase;
  letter-spacing:.7px;margin-bottom:3px}
.pd-quick dd{font-size:16px;font-weight:700;color:var(--navy)}
.pd-actions{display:flex;gap:12px;flex-wrap:wrap}

/* feature list */
.feature-list{display:grid;gap:16px}
.feature-list li{display:flex;gap:14px;align-items:flex-start;background:#fff;
  border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.feature-list li b{flex:0 0 34px;height:34px;border-radius:10px;background:var(--orange-soft);
  color:var(--orange-dark);display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:800}
.feature-list h4{font-size:17.5px;margin-bottom:4px}
.feature-list p{font-size:15.5px}

/* spec table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;box-shadow:var(--shadow)}
table.spec{width:100%;border-collapse:collapse;min-width:560px}
table.spec caption{text-align:start;padding:20px 22px 0;font-size:17px;font-weight:800;
  color:var(--navy)}
table.spec th,table.spec td{padding:15px 22px;font-size:16px;text-align:start;
  border-bottom:1px solid var(--line);vertical-align:top}
table.spec th{background:var(--light);color:var(--navy);font-weight:800;width:38%;
  white-space:nowrap}
table.spec td{color:var(--ink)}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0}
table.spec tbody tr:hover td{background:#FBFCFE}

/* applications */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.app-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow)}
.app-card img{aspect-ratio:16/10;object-fit:cover;width:100%}
.app-card figcaption{padding:20px 22px 24px}
.app-card strong{display:block;font-size:18px;color:var(--navy);margin-bottom:6px}
.app-card span{font-size:15px;color:var(--slate)}

/* trade info bar */
.trade-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.trade-card{background:#fff;border:1px solid var(--line);border-inline-start:5px solid var(--orange);
  border-radius:12px;padding:24px 26px}
.trade-card h4{font-size:17px;margin-bottom:8px;display:flex;align-items:center;gap:9px}
.trade-card p{font-size:15.5px;color:var(--ink)}
.trade-note{font-size:14px;color:var(--slate);margin-top:20px;text-align:center}

/* ============================================================
   8. QUOTE / FORM
   ============================================================ */
.quote-layout{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:60px;
  align-items:start}
.quote-text h2{margin-bottom:16px}
.quote-text>p{font-size:17.5px;margin-bottom:22px}
.dash-list{display:flex;flex-direction:column;gap:11px;margin-bottom:26px}
.dash-list li{position:relative;padding-inline-start:24px;font-size:16.5px;color:var(--ink)}
.dash-list li::before{content:"—";position:absolute;inset-inline-start:0;color:var(--orange);
  font-weight:800}
.quote-contact{border-inline-start:5px solid var(--orange);background:#fff;
  padding:18px 22px;border-radius:11px;box-shadow:var(--shadow)}
.quote-contact p{margin:3px 0;font-size:16px}
.quote-contact a{color:var(--orange-dark);font-weight:700}

.inquiry-form{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);
  padding:36px 34px;border:1px solid var(--line);display:flex;flex-direction:column;gap:17px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:17px}
.inquiry-form label{display:flex;flex-direction:column;gap:7px;font-size:15px;
  font-weight:700;color:var(--navy)}
.inquiry-form .req .lb::after{content:" *";color:var(--orange)}
.inquiry-form input,.inquiry-form select,.inquiry-form textarea{
  border:1.5px solid var(--line);border-radius:10px;padding:14px 16px;font-size:16.5px;
  font-family:inherit;color:var(--ink);background:var(--light);width:100%;
  transition:border-color .15s,background .15s}
.inquiry-form textarea{resize:vertical;min-height:118px}
.inquiry-form input:focus,.inquiry-form select:focus,.inquiry-form textarea:focus{
  outline:none;border-color:var(--orange);background:#fff;
  box-shadow:0 0 0 3px rgba(232,113,10,.13)}
.form-message{display:none;padding:14px 18px;border-radius:10px;font-size:16px;font-weight:700}
.form-message.is-ok{display:block;background:#E8F6EE;color:var(--ok);border:1px solid #B6E3CB}
.form-message.is-err{display:block;background:#FDECEA;color:var(--err);border:1px solid #F2C2BC}
.form-note{font-size:14px;color:var(--slate);text-align:center}
.form-note a{color:var(--orange-dark);font-weight:700}
.form-aside{background:var(--light);border-radius:11px;padding:16px 18px;font-size:15px;
  color:var(--slate);border:1px dashed #CFDCE7}

/* ============================================================
   9. FAQ
   ============================================================ */
.faq{display:flex;flex-direction:column;gap:12px;max-width:920px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0;
  overflow:hidden}
.faq summary{cursor:pointer;padding:20px 24px;font-size:17.5px;font-weight:700;
  color:var(--navy);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:24px;color:var(--orange);line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 24px 22px;font-size:16px}

/* ============================================================
   10. FOOTER
   ============================================================ */
.footer{background:var(--navy-deep);color:rgba(255,255,255,.78)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;gap:44px;
  padding:66px 22px 50px;max-width:var(--container);margin:0 auto}
.footer h4{color:#fff;font-size:17px;margin-bottom:18px}
.footer ul{display:flex;flex-direction:column;gap:11px;font-size:15.5px}
.footer a:hover{color:#fff;text-decoration:underline}
.brand--footer .brand-name{color:#fff}
.brand--footer .brand-tag{color:rgba(255,255,255,.55)}
.footer-about p{margin-top:18px;font-size:15px;line-height:1.7;color:rgba(255,255,255,.72)}
.footer-logo{display:flex;align-items:center;gap:13px}
.footer-logo img{width:56px;height:56px;border-radius:14px;
  box-shadow:0 0 0 3px rgba(255,255,255,.14)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.13);padding:22px 0;font-size:14.5px}
.footer-bottom .container{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-cert{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.footer-cert span{border:1.5px solid rgba(255,255,255,.3);border-radius:999px;
  padding:6px 15px;font-size:13px;color:rgba(255,255,255,.8)}

/* ============================================================
   11. FLOATING ACTIONS
   ============================================================ */
.wa-float{position:fixed;inset-inline-end:24px;bottom:24px;z-index:120;width:62px;height:62px;
  border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 26px rgba(37,211,102,.46);transition:transform .2s}
.wa-float:hover{transform:scale(1.09)}
.wa-float svg{width:32px;height:32px;fill:#fff}
.wa-float::after{content:"";position:absolute;inset:0;border-radius:50%;
  border:2px solid rgba(37,211,102,.5);animation:waPulse 2.4s infinite}
@keyframes waPulse{0%{transform:scale(1);opacity:.9}70%{transform:scale(1.45);opacity:0}
  100%{transform:scale(1.45);opacity:0}}

/* sticky mobile inquiry bar */
.mobile-cta{display:none}
@media(max-width:640px){
  .mobile-cta{display:grid;grid-template-columns:1fr 1fr;gap:0;position:fixed;
    inset-inline:0;bottom:0;z-index:115;background:#fff;border-top:1px solid var(--line);
    box-shadow:0 -4px 18px rgba(11,36,64,.12)}
  .mobile-cta a{padding:15px 10px;text-align:center;font-size:16px;font-weight:800;
    display:flex;align-items:center;justify-content:center;gap:8px}
  .mobile-cta a:first-child{color:var(--navy);border-inline-end:1px solid var(--line)}
  .mobile-cta a:last-child{color:#fff;background:#25D366}
  .mobile-cta svg{width:19px;height:19px;fill:currentColor}
  .wa-float{bottom:78px;width:56px;height:56px}
  body{padding-bottom:56px}
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:1100px){
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .product-grid,.app-grid,.trade-grid{grid-template-columns:repeat(2,1fr)}
  .hero-inner{grid-template-columns:1fr;gap:38px}
  .hero-panel{max-width:560px}
  .pd-top{grid-template-columns:1fr;gap:38px}
  .pd-gallery{position:static}
  .quote-layout{grid-template-columns:1fr;gap:44px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  body{font-size:16.5px}
  .header-inner{min-height:76px;gap:12px}
  /* 窄屏下品牌区必须可收缩，否则标语会把汉堡按钮挤出屏幕 */
  .brand{flex-shrink:1;min-width:0;gap:12px}
  .brand-text{min-width:0}
  .brand-tag{letter-spacing:.8px;line-height:1.25}
  .nav-toggle{flex:0 0 auto}
  .brand img{width:50px;height:50px}
  .brand-name{font-size:23px}
  .nav{position:fixed;top:0;inset-inline-end:-100%;inset-inline-start:auto;
    width:min(330px,86vw);height:100vh;background:#fff;flex-direction:column;
    align-items:stretch;padding:96px 28px 32px;gap:6px;overflow-y:auto;
    box-shadow:-8px 0 34px rgba(0,0,0,.16);transition:inset-inline-end .3s ease;z-index:99}
  .nav.is-open{inset-inline-end:0}
  [dir="rtl"] .nav{box-shadow:8px 0 34px rgba(0,0,0,.16)}
  .nav-link{padding:14px 4px;font-size:18px;border-bottom:1px solid var(--line)}
  .nav-link::after{display:none}
  .btn--nav{margin-top:16px;width:100%}
  .nav-toggle{display:block;position:relative;z-index:101}
  .lang{margin-top:14px}
  .lang-menu{position:static;display:none;box-shadow:none;border-radius:9px;margin-top:8px;
    width:100%}
  .lang.is-open .lang-menu{display:block}
  .section{padding:64px 0}
  .section-head{margin-bottom:38px}
  .hero{padding-top:52px}
  .hero-inner{padding-bottom:56px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px}
  .stat{border-inline-end:0}
  .stat:nth-child(odd){border-inline-end:1px solid var(--line)}
  .stat:nth-child(5){grid-column:span 2}
  .grid--2,.grid--3,.product-grid,.app-grid,.trade-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:34px;padding:52px 22px 40px}
  .pd-quick{grid-template-columns:1fr 1fr}
  table.spec th,table.spec td{padding:13px 16px;font-size:15.5px}
}
@media(max-width:520px){
  .brand{gap:10px}
  .brand img{width:44px;height:44px}
  .brand-name{font-size:20px}
  .brand-tag{font-size:10px;letter-spacing:.6px}
  .hero-actions .btn{width:100%}
  .hero-stats{grid-template-columns:1fr 1fr;padding:20px 8px}
  .inquiry-form{padding:24px 18px}
  .pd-quick{grid-template-columns:1fr}
  .pd-thumbs{grid-template-columns:repeat(4,1fr);gap:8px}
  .footer-bottom .container{flex-direction:column;text-align:center}
}

/* applications split (product detail) */
.app-split{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);
  gap:42px;align-items:center}
.app-media{position:relative;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-lg);background:#0B2440}
.app-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.app-media figcaption{position:absolute;inset-inline:0;bottom:0;padding:48px 24px 18px;
  background:linear-gradient(180deg,transparent,rgba(11,36,64,.92));color:#fff;
  font-size:15.5px;font-weight:800;letter-spacing:.4px}
.app-list{display:flex;flex-direction:column;gap:18px}
.app-list li{display:flex;gap:16px;align-items:flex-start;background:#fff;
  border:1px solid var(--line);border-radius:12px;padding:20px 22px}
.app-list li b{flex:0 0 40px;height:40px;border-radius:11px;background:var(--navy);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800}
.app-list strong{display:block;font-size:17.5px;color:var(--navy);margin-bottom:5px}
.app-list span{font-size:15.5px;color:var(--slate)}
@media(max-width:900px){.app-split{grid-template-columns:1fr;gap:26px}}

/* 404 page */
.err-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:56px 32px;text-align:center}
.err-code{font-size:clamp(72px,13vw,132px);font-weight:900;line-height:1;
  letter-spacing:-2px;background:linear-gradient(135deg,var(--navy),var(--orange));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  margin-bottom:22px}
.err-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.err-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.err-link{display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;
  font-size:16.5px;font-weight:800;color:var(--navy);transition:border-color .15s,transform .15s}
.err-link:hover{border-color:var(--orange);transform:translateY(-2px);color:var(--orange)}
.err-link .btn-arrow{color:var(--orange)}
@media(max-width:900px){.err-links{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.err-box{padding:40px 20px}.err-links{grid-template-columns:1fr}
  .err-actions .btn{width:100%}}

/* ============================================================
   17. WhatsApp 图标 / 单行说明文字 / 详情页工艺标签
   ============================================================ */
.ico-wa{display:inline-flex;align-items:center;justify-content:center;
  width:16px;height:16px;flex:0 0 16px;vertical-align:-.16em}
.ico-wa svg,.topbar-item .ico-wa svg,.footer .ico-wa svg{
  width:100%;height:100%;fill:#25D366;opacity:1}
.wa-lb{white-space:nowrap}

/* 首页产品区右侧说明：桌面端强制一行 */
.section-head-side.nowrap{max-width:none;white-space:nowrap;font-size:15px;flex:0 1 auto}
@media(max-width:1180px){
  .section-head-side.nowrap{white-space:normal;font-size:16px;max-width:380px}
}

/* 产品详情页：锻压 / 冲压 工艺标签 */
.pd-proc{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:-6px 0 22px}
.pd-proc-l{font-size:12.5px;font-weight:800;letter-spacing:.8px;text-transform:uppercase;
  color:var(--slate)}
.pd-proc-chip{display:inline-flex;align-items:center;font-size:13.5px;font-weight:700;
  color:var(--navy);background:var(--light);border:1px solid var(--line);
  border-radius:999px;padding:6px 15px}

/* print (product spec sheets) */
@media print{
  .header,.footer,.topbar,.wa-float,.mobile-cta,.pd-actions,.inquiry-form{display:none!important}
  .section{padding:18px 0}
  body{font-size:12pt}
}