/* =========================================================================
   GUANGDA TINPLATE — CORE STYLESHEET
   Design concept: "engineering datasheet" — the site borrows its structure
   from a can-end spec sheet: concentric diameter rings, bordered data
   blocks, tab-numbered callouts. Industrial blue/graphite + clean plant
   white, with safety-orange reserved for conversion actions only.
   No external fonts, no framework — plain CSS, custom properties, BEM-ish
   classes. RTL handled via [dir="rtl"] overrides at the bottom.
   ========================================================================= */

:root{
  /* ---- palette ---- */
  --navy:        #14324B;   /* primary brand — deep industrial blue  */
  --navy-2:      #1E4A6E;   /* lighter interactive blue              */
  --graphite:    #20262B;   /* headings / footer bg                  */
  --steel:       #5B6772;   /* secondary text                        */
  --steel-2:     #8B96A0;   /* tertiary text / placeholders          */
  --line:        #DCE2E6;   /* hairline borders                      */
  --bg:          #F5F7F8;   /* page background                       */
  --bg-alt:      #ECF0F2;   /* section alt background                */
  --white:       #FFFFFF;
  --accent:      #D9631C;   /* CTA orange                            */
  --accent-dark: #B55013;
  --accent-ring: #2E7FB8;   /* diagram / info blue                   */
  --ok:          #2E7D4F;

  /* ---- type ---- */
  --f-sans: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans", sans-serif;

  /* ---- layout ---- */
  --maxw: 1240px;
  --radius: 3px;
  --shadow: 0 2px 14px rgba(20,50,75,.08);
  --shadow-lg: 0 12px 40px rgba(20,50,75,.16);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--f-sans);
  color:var(--graphite);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--graphite);}
p{margin:0 0 1em;color:var(--steel);}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent-ring);outline-offset:2px;}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section--alt{background:var(--bg-alt);}
.section--navy{background:var(--navy);color:#fff;}
.section--navy p{color:#C7D6E2;}
.section--navy h2, .section--navy h3{color:#fff;}

.eyebrow-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--navy-2);
  background:#fff;border:1px solid var(--line);
  padding:6px 14px 6px 10px;border-radius:20px;
}
.eyebrow-tag svg{width:14px;height:14px;flex:none;}

h2.section-title{font-size:clamp(28px,3.4vw,40px);line-height:1.15;max-width:640px;}
.section-sub{max-width:560px;font-size:17px;margin-top:14px;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:48px;flex-wrap:wrap;}

/* ---------------------------------------------------------------------
   BUTTONS
   --------------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:2px;font-weight:700;font-size:15px;
  border:1.5px solid transparent;transition:transform .15s ease, box-shadow .15s ease, background .2s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(217,99,28,.35);}
.btn-primary:hover{background:var(--accent-dark);box-shadow:0 8px 22px rgba(217,99,28,.45);}
.btn-outline{background:transparent;color:var(--navy);border-color:var(--navy);}
.btn-outline:hover{background:var(--navy);color:#fff;}
.btn-ghost-light{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.4);}
.btn-ghost-light:hover{background:rgba(255,255,255,.18);}
.btn-sm{padding:9px 16px;font-size:13px;}

/* ---------------------------------------------------------------------
   HEADER / NAV
   --------------------------------------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:200;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(160%) blur(6px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy);flex:none;}
.logo .mark{width:38px;height:38px;flex:none;}
.logo .name-cn{font-size:12px;font-weight:600;color:var(--steel);display:block;letter-spacing:.02em;}

.main-nav{display:flex;align-items:center;gap:2px;}
.main-nav a{
  padding:10px 16px;font-size:14.5px;font-weight:600;color:var(--graphite);
  border-radius:2px;position:relative;
}
.main-nav a::after{
  content:"";position:absolute;left:16px;right:16px;bottom:6px;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.main-nav a:hover::after,.main-nav a[aria-current="page"]::after{transform:scaleX(1);}
.main-nav a[aria-current="page"]{color:var(--navy-2);}

.header-actions{display:flex;align-items:center;gap:14px;flex:none;}

/* language switcher */
.lang-switch{position:relative;}
.lang-btn{
  display:flex;align-items:center;gap:6px;padding:9px 12px;border:1px solid var(--line);
  border-radius:2px;background:#fff;font-size:13.5px;font-weight:700;color:var(--graphite);
}
.lang-btn svg{width:14px;height:14px;}
.lang-menu{
  position:absolute;top:calc(100% + 8px);right:0;background:#fff;border:1px solid var(--line);
  border-radius:4px;box-shadow:var(--shadow-lg);min-width:190px;padding:6px;
  display:none;max-height:340px;overflow-y:auto;z-index:300;
}
[dir="rtl"] .lang-menu{right:auto;left:0;}
.lang-menu.open{display:block;}
.lang-menu button{
  display:flex;width:100%;justify-content:space-between;align-items:center;
  padding:9px 10px;border:none;background:none;border-radius:2px;font-size:14px;color:var(--graphite);text-align:left;
}
[dir="rtl"] .lang-menu button{text-align:right;}
.lang-menu button:hover{background:var(--bg-alt);}
.lang-menu button[aria-current="true"]{color:var(--navy-2);font-weight:700;}
.lang-native{color:var(--steel-2);font-size:12px;}

.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:2px;padding:8px;}
.nav-toggle svg{width:20px;height:20px;}

/* ---------------------------------------------------------------------
   HERO
   --------------------------------------------------------------------- */
.hero{
  background:linear-gradient(180deg,#0F2438 0%, var(--navy) 62%, #163A57 100%);
  color:#fff;position:relative;overflow:hidden;padding:76px 0 0;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;position:relative;z-index:2;}
.hero h1{font-size:clamp(32px,4.4vw,54px);line-height:1.08;color:#fff;max-width:620px;}
.hero h1 .accent{color:#F0A56B;}
.hero .lede{font-size:17.5px;color:#C7D6E2;max-width:520px;margin:20px 0 30px;}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px;}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;}
.hero-badge{
  display:flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;color:#EAF2F8;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.22);
  padding:7px 12px;border-radius:20px;
}
.hero-badge svg{width:14px;height:14px;flex:none;color:#8FD0A0;}

/* diameter ring diagram */
.ring-diagram{position:relative;width:100%;aspect-ratio:1/1;max-width:460px;margin-inline-start:auto;}
.ring-diagram svg{width:100%;height:100%;}
.ring-label{font-size:11px;font-weight:700;fill:#DCEBF5;}
.ring-label-sm{font-size:9.5px;fill:#9FBBD0;}

.hero-strip{
  border-top:1px solid rgba(255,255,255,.14);margin-top:56px;
  display:grid;grid-template-columns:repeat(4,1fr);
}
.hero-stat{padding:22px 24px;border-inline-start:1px solid rgba(255,255,255,.14);}
.hero-stat:first-child{border-inline-start:none;}
.hero-stat b{display:block;font-size:26px;color:#fff;font-weight:800;}
.hero-stat span{font-size:12.5px;color:#9FB6C8;}

/* ---------------------------------------------------------------------
   FACTORY / TRUST STRIP
   --------------------------------------------------------------------- */
.trust-strip{background:var(--graphite);color:#fff;padding:14px 0;}
.trust-strip .wrap{display:flex;gap:32px;align-items:center;justify-content:center;flex-wrap:wrap;font-size:12.5px;font-weight:700;letter-spacing:.02em;color:#B9C4CC;}
.trust-strip span{display:flex;align-items:center;gap:7px;}
.trust-strip svg{width:14px;height:14px;color:var(--accent);flex:none;}

/* ---------------------------------------------------------------------
   FEATURE / WHY CARDS  (spec-card treatment, not generic rounded cards)
   --------------------------------------------------------------------- */
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.spec-card{background:#fff;padding:30px 26px;position:relative;}
.spec-card .tag{position:absolute;top:0;right:0;font-size:11px;font-weight:800;color:#fff;background:var(--navy-2);padding:4px 10px;border-radius:0 0 0 4px;}
[dir="rtl"] .spec-card .tag{right:auto;left:0;border-radius:0 0 4px 0;}
.spec-card .icon{width:40px;height:40px;color:var(--navy-2);margin-bottom:16px;}
.spec-card h3{font-size:17px;margin-bottom:8px;}
.spec-card p{font-size:14px;margin:0;}

.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric-card{background:#fff;border:1px solid var(--line);border-top:3px solid var(--accent);padding:26px 22px;}
.metric-card b{display:block;font-size:32px;color:var(--navy);font-weight:800;}
.metric-card span{font-size:13px;color:var(--steel);}

/* ---------------------------------------------------------------------
   PRODUCT GRID
   --------------------------------------------------------------------- */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px;}
.filter-chip{padding:9px 16px;border:1px solid var(--line);background:#fff;border-radius:20px;font-size:13.5px;font-weight:700;color:var(--steel);}
.filter-chip[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff;}

.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.product-card{background:#fff;border:1px solid var(--line);transition:box-shadow .2s ease, transform .2s ease;position:relative;}
.card-link-overlay{position:absolute;inset:0;z-index:1;}
.product-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);}
.product-card .thumb{aspect-ratio:4/3;background:var(--bg-alt);position:relative;overflow:hidden;}
.product-card .thumb img{width:100%;height:100%;object-fit:cover;}
.product-card .thumb .dia{
  position:absolute;bottom:10px;left:10px;background:rgba(20,50,75,.88);color:#fff;
  font-size:12px;font-weight:800;padding:4px 10px;border-radius:2px;
}
[dir="rtl"] .product-card .thumb .dia{left:auto;right:10px;}
.product-card .body{padding:20px 20px 22px;}
.product-card h3{font-size:16.5px;margin-bottom:8px;}
.product-card .meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px;}
.product-card .meta span{font-size:11.5px;font-weight:700;color:var(--navy-2);background:#EAF1F6;padding:3px 9px;border-radius:2px;}
.product-card .more{font-size:13.5px;font-weight:700;color:var(--navy-2);display:inline-flex;align-items:center;gap:5px;}
.product-card .more svg{width:14px;height:14px;transition:transform .15s ease;}
[dir="rtl"] .product-card .more svg{transform:scaleX(-1);}
.product-card:hover .more svg{transform:translateX(3px);}
[dir="rtl"] .product-card:hover .more svg{transform:scaleX(-1) translateX(3px);}

/* ---------------------------------------------------------------------
   SPEC TABLE (technical parameters)
   --------------------------------------------------------------------- */
.spec-table-wrap{overflow-x:auto;border:1px solid var(--line);background:#fff;}
.pd-layout{display:grid;grid-template-columns:380px 1fr;gap:48px;align-items:start;}
.pd-layout .pd-image{width:100%;aspect-ratio:1/1;object-fit:cover;border:1px solid var(--line);border-radius:2px;}
@media (max-width:860px){ .pd-layout{grid-template-columns:1fr;} .pd-layout .pd-image{max-width:420px;margin:0 auto;} }
table.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:640px;}
table.spec-table caption{text-align:left;font-weight:800;padding:16px 18px;border-bottom:1px solid var(--line);}
table.spec-table th,table.spec-table td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line);}
[dir="rtl"] table.spec-table th,[dir="rtl"] table.spec-table td{text-align:right;}
table.spec-table thead th{background:var(--bg-alt);font-size:12.5px;text-transform:uppercase;letter-spacing:.04em;color:var(--steel);font-weight:800;}
table.spec-table tbody tr:last-child td{border-bottom:none;}
table.spec-table td.num{font-variant-numeric:tabular-nums;color:var(--navy);font-weight:700;}

/* ---------------------------------------------------------------------
   TESTIMONIALS
   --------------------------------------------------------------------- */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.testi-card{background:#fff;border:1px solid var(--line);padding:26px 24px;}
.testi-card p{font-size:15px;color:var(--graphite);margin-bottom:18px;}
.testi-who{display:flex;align-items:center;gap:12px;}
.testi-avatar{width:38px;height:38px;border-radius:50%;background:var(--navy-2);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;flex:none;}
.testi-name{font-size:13.5px;font-weight:800;}
.testi-loc{font-size:12px;color:var(--steel-2);}
.stars{color:var(--accent);display:flex;gap:2px;margin-bottom:10px;}
.stars svg{width:14px;height:14px;}

/* ---------------------------------------------------------------------
   GALLERY (factory / production line)
   --------------------------------------------------------------------- */
.gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:150px;gap:10px;}
.gallery-grid a{grid-column:span 1;grid-row:span 1;overflow:hidden;position:relative;display:block;}
.gallery-grid a:nth-child(1){grid-column:span 2;grid-row:span 2;}
.gallery-grid img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.gallery-grid a:hover img{transform:scale(1.05);}
.gallery-cap{position:absolute;left:0;right:0;bottom:0;padding:10px 12px;font-size:12px;font-weight:700;color:#fff;background:linear-gradient(180deg,transparent,rgba(0,0,0,.65));}

/* ---------------------------------------------------------------------
   FAQ ACCORDION
   --------------------------------------------------------------------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:none;display:flex;justify-content:space-between;align-items:center;
  padding:20px 4px;font-size:16px;font-weight:700;text-align:left;color:var(--graphite);gap:20px;
}
[dir="rtl"] .faq-q{text-align:right;}
.faq-q svg{width:18px;height:18px;flex:none;transition:transform .2s ease;color:var(--navy-2);}
.faq-item[data-open="true"] .faq-q svg{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-item[data-open="true"] .faq-a{max-height:600px;}
.faq-a-in{padding:0 4px 22px;font-size:14.5px;color:var(--steel);max-width:760px;}

/* ---------------------------------------------------------------------
   FORMS
   --------------------------------------------------------------------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{display:flex;flex-direction:column;gap:7px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;font-weight:700;color:var(--graphite);}
.field input,.field select,.field textarea{
  padding:12px 14px;border:1px solid var(--line);border-radius:2px;font-size:14.5px;font-family:inherit;
  background:#fff;color:var(--graphite);
}
.field textarea{resize:vertical;min-height:130px;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--navy-2);}
.form-note{font-size:12.5px;color:var(--steel-2);margin-top:14px;}

/* ---------------------------------------------------------------------
   CONTACT PAGE LAYOUT
   --------------------------------------------------------------------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start;}
.contact-card{background:#fff;border:1px solid var(--line);padding:28px;}
.contact-row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);}
.contact-row:last-child{border-bottom:none;}
.contact-row .ic{width:20px;height:20px;color:var(--navy-2);flex:none;margin-top:2px;}
.contact-row b{display:block;font-size:13px;}
.contact-row span{font-size:13.5px;color:var(--steel);}

/* ---------------------------------------------------------------------
   PAGINATION
   --------------------------------------------------------------------- */
.pagination{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-top:48px;}
.pagination a,.pagination span{
  min-width:38px;height:38px;padding:0 10px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:#fff;font-size:13.5px;font-weight:700;color:var(--graphite);border-radius:2px;
}
.pagination a:hover{border-color:var(--navy-2);color:var(--navy-2);}
.pagination .current{background:var(--navy);border-color:var(--navy);color:#fff;}
.pagination .disabled{color:var(--steel-2);pointer-events:none;}

/* ---------------------------------------------------------------------
   NEWS
   --------------------------------------------------------------------- */
.news-list{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line);}
.news-row{display:grid;grid-template-columns:150px 1fr auto;gap:22px;align-items:center;padding:22px 4px;border-bottom:1px solid var(--line);}
.news-row .thumb{aspect-ratio:4/3;overflow:hidden;background:var(--bg-alt);}
.news-row .thumb img{width:100%;height:100%;object-fit:cover;}
.news-row h3{font-size:16.5px;margin-bottom:6px;}
.news-row .date{font-size:12.5px;color:var(--steel-2);font-weight:700;}
.news-row .excerpt{font-size:13.5px;color:var(--steel);}
.news-article h1{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.news-meta{display:flex;gap:16px;font-size:13px;color:var(--steel-2);margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--line);}
.news-body{max-width:760px;font-size:15.5px;color:#3B444C;}
.news-body p{margin-bottom:1.2em;}
.news-body h2{font-size:20px;margin:1.6em 0 .6em;}

/* ---------------------------------------------------------------------
   BREADCRUMB
   --------------------------------------------------------------------- */
.breadcrumb{font-size:12.5px;color:var(--steel-2);padding:16px 0;display:flex;gap:8px;flex-wrap:wrap;}
.breadcrumb a{color:var(--steel);font-weight:600;}
.breadcrumb a:hover{color:var(--navy-2);}

/* ---------------------------------------------------------------------
   PAGE HERO (inner pages)
   --------------------------------------------------------------------- */
.page-hero{background:var(--navy);color:#fff;padding:52px 0 44px;}
.page-hero h1{font-size:clamp(26px,3.4vw,40px);color:#fff;}
.page-hero p{color:#C7D6E2;max-width:600px;margin-top:12px;font-size:15.5px;}

/* ---------------------------------------------------------------------
   FOOTER
   --------------------------------------------------------------------- */
.site-footer{background:var(--graphite);color:#A9B4BC;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.09);}
.footer-brand .logo{color:#fff;}
.footer-brand p{font-size:13.5px;color:#8B98A2;margin-top:14px;max-width:280px;}
.footer-col h4{font-size:13px;color:#fff;letter-spacing:.03em;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:#A9B4BC;}
.footer-col a:hover{color:#fff;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:24px 0;font-size:12.5px;color:#7C8991;flex-wrap:wrap;gap:10px;}
.footer-socials{display:flex;gap:10px;}
.footer-socials a{width:34px;height:34px;border:1px solid rgba(255,255,255,.16);border-radius:50%;display:flex;align-items:center;justify-content:center;}
.footer-socials svg{width:15px;height:15px;color:#C7D0D6;}

/* ---------------------------------------------------------------------
   FLOATING CONTACT WIDGET (fixed, vertically centered)
   --------------------------------------------------------------------- */
.float-contact{
  position:fixed;top:auto;bottom:120px;right:18px;z-index:500;
  display:flex;flex-direction:column;gap:10px;
}
[dir="rtl"] .float-contact{right:auto;left:18px;}
.float-contact .fc-toggle{
  width:56px;height:56px;border-radius:50%;background:var(--accent);color:#fff;border:none;
  display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(217,99,28,.45);
}
.float-contact .fc-toggle svg{width:26px;height:26px;}
.fc-panel{
  position:absolute;bottom:0;right:66px;background:#fff;border:1px solid var(--line);border-radius:8px;
  box-shadow:var(--shadow-lg);padding:14px;width:238px;display:none;
  max-height:min(70vh,480px);overflow-y:auto;
}
[dir="rtl"] .fc-panel{right:auto;left:66px;}
.fc-panel.open{display:block;}
.fc-panel-title{font-size:12px;font-weight:800;color:var(--steel-2);text-transform:uppercase;letter-spacing:.05em;padding:2px 6px 10px;}
.fc-link{
  display:flex;align-items:center;gap:10px;padding:10px 8px;border-radius:6px;font-size:13.5px;font-weight:700;color:var(--graphite);
  white-space:normal;line-height:1.3;
}
.fc-link:hover{background:var(--bg-alt);}
.fc-link .ic{width:30px;height:30px;border-radius:50%;flex:none;display:flex;align-items:center;justify-content:center;color:#fff;}
.fc-link .ic svg{width:16px;height:16px;}
.fc-link small{display:block;font-weight:600;color:var(--steel-2);font-size:11px;}
.ic-whatsapp{background:#25D366;} .ic-wechat{background:#07C160;} .ic-line{background:#06C755;}
.ic-messenger{background:#0084FF;} .ic-telegram{background:#26A5E4;} .ic-mail{background:var(--navy-2);}
.ic-chat{background:var(--accent);}

/* ---------------------------------------------------------------------
   RESPONSIVE
   --------------------------------------------------------------------- */
@media (max-width: 1080px){
  .spec-grid{grid-template-columns:repeat(2,1fr);}
  .metric-grid{grid-template-columns:repeat(2,1fr);}
  .product-grid{grid-template-columns:repeat(2,1fr);}
  .testi-grid{grid-template-columns:repeat(1,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .contact-grid{grid-template-columns:1fr;}
}
@media (max-width: 860px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .hero-grid{grid-template-columns:1fr;}
  .ring-diagram{max-width:320px;margin:0 auto;}
  .hero-strip{grid-template-columns:repeat(2,1fr);}
  .hero-stat:nth-child(3){border-inline-start:none;}
  .news-row{grid-template-columns:100px 1fr;}
  .news-row .more-col{display:none;}
}
@media (max-width: 640px){
  .section{padding:56px 0;}
  .spec-grid{grid-template-columns:1fr;}
  .metric-grid{grid-template-columns:1fr 1fr;}
  .product-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .gallery-grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:120px;}
  .gallery-grid a:nth-child(1){grid-column:span 2;grid-row:span 1;}
  .float-contact{right:12px;}
  [dir="rtl"] .float-contact{left:12px;}
  .fc-panel{width:210px;}
}

/* mobile nav drawer */
.mobile-nav{
  position:fixed;inset:0;background:rgba(15,30,45,.5);z-index:400;display:none;
}
.mobile-nav.open{display:block;}
.mobile-nav-panel{
  position:absolute;top:0;right:0;height:100%;width:82%;max-width:340px;background:#fff;
  padding:24px;overflow-y:auto;
}
[dir="rtl"] .mobile-nav-panel{right:auto;left:0;}
.mobile-nav-panel a{display:block;padding:14px 4px;font-size:16px;font-weight:700;border-bottom:1px solid var(--line);}
.mobile-nav-close{margin-bottom:10px;background:none;border:none;padding:8px;}
.mobile-nav-close svg{width:22px;height:22px;}

/* ---------------------------------------------------------------------
   RTL LAYOUT ADJUSTMENTS
   --------------------------------------------------------------------- */
[dir="rtl"] body{text-align:right;}
[dir="rtl"] table.spec-table caption{text-align:right;}
[dir="rtl"] .section-head{flex-direction:row-reverse;}
[dir="rtl"] .hero-grid{direction:rtl;}
[dir="rtl"] .ring-diagram{margin-inline-start:0;margin-inline-end:auto;}
[dir="rtl"] .main-nav a::after{left:auto;right:16px;}