/* ============================================================
   XINSHENG ELECTRIC — v3 design system
   Navy #0a2540 · Steel #8da9c4 · Amber #f59e0b
   31 pages (EN/RU/AR) share this single stylesheet.
   ============================================================ */

/* ---------- Design tokens ---------- */
:root{
  --navy:#0a2540;
  --navy-2:#13315c;
  --navy-3:#1b3a6b;
  --navy-4:#24507f;
  --steel:#8da9c4;
  --steel-light:#e6edf5;
  --steel-lighter:#f1f5fa;
  --amber:#f59e0b;
  --amber-dark:#d97706;
  --amber-light:#fef3e2;
  --text:#16202e;
  --text-2:#33445a;
  --muted:#5b6b7b;
  --muted-2:#8494a6;
  --bg:#f7f9fc;
  --white:#fff;
  --border:#dde5ef;
  --border-2:#c9d5e4;

  --shadow-xs:0 1px 2px rgba(10,37,64,.05);
  --shadow-sm:0 2px 8px rgba(10,37,64,.06);
  --shadow:0 4px 16px rgba(10,37,64,.08);
  --shadow-lg:0 12px 34px rgba(10,37,64,.13);
  --shadow-xl:0 24px 60px rgba(10,37,64,.18);

  --r-sm:6px;
  --r:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-full:999px;

  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px;
  --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;

  --ease:cubic-bezier(.4,0,.2,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --container:1200px;
  --header-h:72px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
  -webkit-text-size-adjust:100%;
}

body{
  font-family:"Inter","Noto Sans","Noto Sans Arabic","Noto Sans SC",
              -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,
              "Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);background:var(--bg);
  line-height:1.68;font-size:16px;
  font-feature-settings:"kern","liga","cv11";
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

a{color:var(--navy);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--amber-dark)}
img,svg{max-width:100%;height:auto;display:block}
ul{list-style:none}

:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:4px}

.container{max-width:var(--container);margin:0 auto;padding-inline:var(--sp-5)}

/* ---------- Skip link ---------- */
.skip-link{
  /* Visually hidden without off-canvas positioning: an off-screen left
     offset extends the scrollable area in RTL documents. */
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;
  border:0;background:var(--navy);color:#fff;font-weight:700;
}
.skip-link:focus{
  position:fixed;inset-inline-start:12px;top:12px;z-index:1000;
  width:auto;height:auto;margin:0;padding:12px 20px;
  overflow:visible;clip:auto;clip-path:none;
  border-radius:0 0 var(--r) 0;color:#fff;
}

/* ---------- Top bar ---------- */
.topbar{
  background:var(--navy);color:#b8c9de;font-size:13px;padding:7px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px 20px}
.topbar a{color:#dbe6f2;font-weight:600;transition:color .18s var(--ease)}
.topbar a:hover{color:var(--amber)}
.topbar span{display:inline-flex;align-items:center;gap:6px}

/* ---------- Header ---------- */
header.site{
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:100;
  transition:box-shadow .25s var(--ease);
}
header.site.scrolled{box-shadow:var(--shadow)}
header.site .container{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);min-height:var(--header-h);padding-block:10px}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:44px;height:44px;flex:0 0 44px;
  background:linear-gradient(140deg,var(--navy) 0%,var(--navy-3) 100%);
  border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:20px;letter-spacing:.5px;
  box-shadow:var(--shadow-sm);
}
.brand-name{font-weight:800;color:var(--navy);font-size:18px;letter-spacing:.4px;line-height:1.2}
.brand-sub{font-size:10.5px;color:var(--muted-2);letter-spacing:1.4px;text-transform:uppercase;line-height:1.4;margin-top:2px}

nav.main{margin-inline-start:auto}
nav.main ul{display:flex;gap:4px;align-items:center}
nav.main a{
  display:block;font-weight:600;font-size:15px;color:var(--text-2);
  padding:9px 14px;border-radius:var(--r-sm);
  transition:all .18s var(--ease);position:relative;
}
nav.main a:hover{color:var(--navy);background:var(--steel-lighter)}
nav.main a.active{color:var(--navy);background:var(--steel-light);font-weight:700}

.menu-toggle{
  display:none;background:var(--white);border:1px solid var(--border-2);
  padding:9px 12px;cursor:pointer;font-size:19px;border-radius:var(--r-sm);
  color:var(--navy);line-height:1;transition:all .18s var(--ease);
}
.menu-toggle:hover{border-color:var(--steel);background:var(--steel-lighter)}

/* ---------- Language switcher ---------- */
.lang-switch{
  display:flex;flex:0 0 auto;margin-inline-start:var(--sp-4);
  background:var(--steel-lighter);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:3px;gap:2px;
}
.lang-switch a{
  padding:5px 11px;font-size:12.5px;font-weight:700;letter-spacing:.4px;
  color:var(--muted);border-radius:4px;transition:all .18s var(--ease);
}
.lang-switch a.active{background:var(--navy);color:#fff;box-shadow:var(--shadow-xs)}
.lang-switch a:hover:not(.active){background:var(--white);color:var(--navy)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;isolation:isolate;
  background:
    radial-gradient(1100px 480px at 78% 18%,rgba(37,80,127,.55) 0%,transparent 62%),
    radial-gradient(700px 380px at 12% 88%,rgba(245,158,11,.13) 0%,transparent 60%),
    linear-gradient(135deg,#0a2540 0%,#102c50 45%,#1b3a6b 100%);
  color:#fff;padding:clamp(64px,9vw,104px) 0 clamp(72px,10vw,116px);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;opacity:.07;
  background-image:
    linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 85%);
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 85%);
}
.hero::after{
  content:"";position:absolute;inset-inline:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(245,158,11,.5),transparent);
  z-index:-1;
}
.hero-grid-svg{
  position:absolute;inset-inline-end:-90px;top:50%;transform:translateY(-50%);
  width:min(560px,46vw);opacity:.3;pointer-events:none;z-index:-1;
}
.hero .container{position:relative;z-index:2}
.hero h1{
  font-size:clamp(32px,5.2vw,50px);line-height:1.14;margin-bottom:var(--sp-5);
  font-weight:800;max-width:820px;letter-spacing:-.5px;
}
.hero h1 span.accent{
  color:var(--amber);
  background:linear-gradient(180deg,transparent 62%,rgba(245,158,11,.22) 62%);
}
.hero p.lead{
  font-size:clamp(16px,1.9vw,19px);color:#c3d3e6;max-width:700px;
  margin-bottom:var(--sp-6);line-height:1.72;
}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--sp-4);margin-top:var(--sp-8);
  padding-top:var(--sp-6);border-top:1px solid rgba(255,255,255,.13);
}
.hero-stat strong{
  display:block;font-size:clamp(24px,3vw,31px);color:var(--amber);
  font-weight:800;letter-spacing:-.5px;line-height:1.1;
}
.hero-stat span{
  display:block;font-size:12px;color:#9fb3cd;letter-spacing:1.1px;
  text-transform:uppercase;margin-top:6px;font-weight:600;line-height:1.4;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:var(--r-sm);font-weight:700;font-size:15px;
  transition:all .2s var(--ease);cursor:pointer;border:1.5px solid transparent;
  letter-spacing:.2px;
}
.btn-primary{background:var(--amber);color:var(--navy);box-shadow:0 6px 18px rgba(245,158,11,.3)}
.btn-primary:hover{background:#fbbf24;color:var(--navy);transform:translateY(-2px);box-shadow:0 10px 26px rgba(245,158,11,.38)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.42);backdrop-filter:blur(4px)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.12);color:#fff;transform:translateY(-2px)}
.btn-navy{background:var(--navy);color:#fff;box-shadow:var(--shadow-sm)}
.btn-navy:hover{background:var(--navy-2);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-outline{background:transparent;color:var(--navy);border-color:var(--border-2)}
.btn-outline:hover{border-color:var(--navy);background:var(--steel-lighter);color:var(--navy)}

/* ---------- Sections ---------- */
section{padding:clamp(52px,7vw,84px) 0;position:relative}
section.alt{background:var(--steel-light)}
section.alt::before{
  content:"";position:absolute;inset-inline:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--border-2),transparent);
}

h2.section-title{
  font-size:clamp(25px,3.4vw,33px);color:var(--navy);
  margin-bottom:var(--sp-3);font-weight:800;letter-spacing:-.4px;line-height:1.25;
}
h2.section-title::after{
  content:"";display:block;width:52px;height:3px;background:var(--amber);
  margin-top:14px;border-radius:2px;
}
p.section-lead{
  color:var(--muted);margin-bottom:var(--sp-7);max-width:820px;
  font-size:16.5px;line-height:1.7;
}

/* ---------- Cards / grid ---------- */
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-5)}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-5)}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-4)}

.card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:var(--sp-6);transition:all .28s var(--ease);box-shadow:var(--shadow-xs);
  display:flex;flex-direction:column;
}
.card:hover{
  box-shadow:var(--shadow-lg);transform:translateY(-4px);
  border-color:var(--steel);
}
.card h3{color:var(--navy);font-size:18.5px;margin:var(--sp-4) 0 var(--sp-2);font-weight:700;line-height:1.35}
.card p{color:var(--muted);font-size:14.5px;line-height:1.65}
.card .ico{
  width:50px;height:50px;background:var(--steel-lighter);border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;color:var(--navy);
  font-weight:800;font-size:14px;letter-spacing:.6px;
  border:1px solid var(--border);transition:all .28s var(--ease);
}
.card:hover .ico{background:var(--navy);color:#fff;border-color:var(--navy)}
.card-link{display:block;color:inherit}
.card-link:hover{color:inherit}
.card-link::after{content:"";position:absolute;inset:0}

/* product card image */
.product-img{
  width:100%;aspect-ratio:4/3;object-fit:contain;
  border-radius:var(--r-sm);background:linear-gradient(160deg,#fbfcfe,#eef3f9);
  border:1px solid var(--border);margin-bottom:var(--sp-4);padding:10px;
  transition:transform .4s var(--ease-out);
}
.card:hover .product-img{transform:scale(1.04)}
.product-img-lg{
  width:100%;max-height:400px;object-fit:contain;
  border-radius:var(--r-md);background:linear-gradient(160deg,#fbfcfe,#eef3f9);
  border:1px solid var(--border);margin:var(--sp-4) 0;padding:14px;
}

/* ---------- Why us ---------- */
.why{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-5)}
.why-item{
  display:flex;gap:var(--sp-4);background:#fff;padding:var(--sp-5);
  border-radius:var(--r-md);border:1px solid var(--border);
  transition:all .28s var(--ease);
}
.why-item:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:var(--steel)}
.why-item .num{
  flex:0 0 42px;height:42px;background:var(--navy);color:var(--amber);
  border-radius:var(--r-full);display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;box-shadow:0 4px 12px rgba(10,37,64,.18);
}
.why-item h4{color:var(--navy);margin-bottom:6px;font-size:16.5px;font-weight:700}
.why-item p{color:var(--muted);font-size:14.5px;line-height:1.65}

/* ---------- Tables ---------- */
.table-wrap{
  overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--border);
  border-radius:var(--r-md);background:#fff;box-shadow:var(--shadow-xs);
}
table.spec{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
table.spec th,table.spec td{border-bottom:1px solid var(--border);padding:14px 18px;text-align:start}
table.spec th{
  background:var(--navy);color:#fff;font-weight:700;
  text-transform:uppercase;font-size:11.5px;letter-spacing:.9px;
}
table.spec tr:nth-child(even){background:#fafbfd}
table.spec tr:last-child td{border-bottom:none}
table.spec tbody tr{transition:background .18s var(--ease)}
table.spec tbody tr:hover{background:var(--steel-lighter)}
table.spec td:first-child{font-weight:600;color:var(--navy);width:38%}

/* ---------- Page hero ---------- */
.page-hero{
  background:
    radial-gradient(760px 320px at 82% 22%,rgba(37,80,127,.5) 0%,transparent 65%),
    linear-gradient(135deg,var(--navy),var(--navy-2));
  color:#fff;padding:clamp(38px,5vw,56px) 0;position:relative;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;opacity:.06;
  background-image:
    linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:40px 40px;
}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{font-size:clamp(28px,3.8vw,38px);font-weight:800;letter-spacing:-.4px}
.page-hero p{color:#c3d3e6;margin-top:10px;font-size:17px;max-width:760px;line-height:1.65}
.breadcrumb{font-size:13px;color:#9fb3cd;margin-bottom:14px;display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.breadcrumb a{color:#dbe6f2;font-weight:600}
.breadcrumb a:hover{color:var(--amber)}

/* ---------- Forms ---------- */
form.inquiry{
  background:#fff;border:1px solid var(--border);padding:var(--sp-7);
  border-radius:var(--r-md);box-shadow:var(--shadow);
}
form.inquiry label{
  display:block;font-weight:600;margin:var(--sp-4) 0 7px;
  font-size:13.5px;color:var(--navy);letter-spacing:.2px;
}
form.inquiry label:first-child{margin-top:0}
form.inquiry input,form.inquiry select,form.inquiry textarea{
  width:100%;padding:13px 15px;border:1px solid var(--border-2);
  border-radius:var(--r-sm);font-size:15px;font-family:inherit;
  background:#fbfcfe;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
form.inquiry input:focus,form.inquiry select:focus,form.inquiry textarea:focus{
  outline:none;border-color:var(--navy);background:#fff;
  box-shadow:0 0 0 3px rgba(10,37,64,.09);
}
form.inquiry textarea{min-height:150px;resize:vertical}
form.inquiry button{margin-top:var(--sp-5);width:100%}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-4)}
.form-note{font-size:12.5px;color:var(--muted);margin-top:var(--sp-3)}
.form-alt{margin-top:var(--sp-3);font-size:13.5px;color:var(--muted);text-align:center}

/* ---------- Contact block ---------- */
.contact-block{display:grid;grid-template-columns:1fr 1.45fr;gap:var(--sp-6);align-items:start}
.contact-info{
  background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#fff;
  padding:var(--sp-7);border-radius:var(--r-md);box-shadow:var(--shadow-lg);
  position:relative;overflow:hidden;
}
.contact-info::after{
  content:"";position:absolute;inset-inline-end:-60px;top:-60px;
  width:200px;height:200px;border-radius:50%;
  background:radial-gradient(circle,rgba(245,158,11,.16),transparent 70%);
}
.contact-info h3{color:#fff;margin-bottom:var(--sp-5);font-size:21px;position:relative}
.contact-info p{margin-bottom:var(--sp-4);color:#c3d3e6;font-size:15px;position:relative}
.contact-info strong{
  color:#fff;display:block;font-size:11.5px;text-transform:uppercase;
  letter-spacing:1.1px;margin-bottom:3px;font-weight:700;
}
.contact-info a{color:#fff;font-weight:600}
.contact-info a:hover{color:var(--amber)}

/* ---------- Badges / chips ---------- */
.badge{
  display:inline-block;background:var(--white);color:var(--navy);
  padding:8px 15px;border-radius:var(--r-full);font-size:12.5px;font-weight:600;
  margin:0 8px 10px 0;border:1px solid var(--border-2);
  transition:all .2s var(--ease);
}
.badge:hover{border-color:var(--navy);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px}

/* ---------- Feature list ---------- */
.feature-list{list-style:none;margin-top:var(--sp-4)}
.feature-list li{
  padding:9px 0 9px 30px;position:relative;color:var(--text);font-size:15px;
  line-height:1.6;
}
.feature-list li::before{
  content:"";position:absolute;inset-inline-start:0;top:14px;
  width:18px;height:18px;border-radius:50%;background:var(--amber-light);
  border:1px solid var(--amber);
}
.feature-list li::after{
  content:"";position:absolute;inset-inline-start:5.5px;top:18px;
  width:7px;height:4px;border-inline-start:2px solid var(--amber-dark);
  border-bottom:2px solid var(--amber-dark);
  transform:rotate(-45deg);
}

/* ---------- FAQ ---------- */
.faq{margin-top:var(--sp-4)}
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:var(--sp-5) var(--sp-6);margin-bottom:var(--sp-3);
  transition:all .24s var(--ease);
}
.faq-item:hover{box-shadow:var(--shadow-sm);border-color:var(--steel)}
.faq-item h4{color:var(--navy);margin-bottom:8px;font-size:16.5px;font-weight:700}
.faq-item p{color:var(--muted);font-size:14.5px;line-height:1.68}

/* ---------- Trust strip ---------- */
.trust-strip{
  background:var(--white);border-block:1px solid var(--border);
  padding:var(--sp-5) 0;
}
.trust-strip .container{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:var(--sp-4);
}
.trust-item{display:flex;align-items:center;gap:11px;font-size:14px;color:var(--text-2);font-weight:600}
.trust-item .dot{
  width:34px;height:34px;border-radius:var(--r-sm);flex:0 0 34px;
  background:var(--steel-lighter);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;
  color:var(--navy);font-size:15px;font-weight:800;
}

/* ---------- Footer ---------- */
footer.site{
  background:linear-gradient(160deg,#081e35 0%,#0a2540 60%,#102c50 100%);
  color:#9fb3cd;padding:clamp(48px,6vw,68px) 0 var(--sp-6);
  margin-top:0;position:relative;
}
footer.site::before{
  content:"";position:absolute;inset-inline:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--amber),transparent 65%);
}
footer.site h4{
  color:#fff;margin-bottom:var(--sp-4);font-size:13px;
  text-transform:uppercase;letter-spacing:1.2px;font-weight:700;
}
footer.site a{color:#9fb3cd;display:block;padding:5px 0;font-size:14.5px;transition:color .18s var(--ease)}
footer.site a:hover{color:var(--amber);padding-inline-start:4px}
.footer-grid{display:grid;grid-template-columns:2.1fr 1fr 1fr 1.5fr;gap:var(--sp-6);margin-bottom:var(--sp-6)}
.footer-grid p{font-size:14px;line-height:1.75}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding-top:var(--sp-5);
  font-size:13px;text-align:center;color:#7d94b3;
}

/* ---------- SVG illustration block ---------- */
.illus{
  background:linear-gradient(140deg,var(--steel-lighter),#e9f0f8);
  border-radius:var(--r-md);padding:var(--sp-6);
  display:flex;align-items:center;justify-content:center;min-height:200px;
  border:1px solid var(--border);
}

/* ---------- Contact card (4-item block) ---------- */
.contact-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:var(--sp-4);margin-top:var(--sp-5);
}
.contact-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:var(--sp-5);display:flex;gap:var(--sp-4);align-items:flex-start;
  transition:all .24s var(--ease);
}
a.contact-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:var(--steel)}
.contact-card .ico{
  flex:0 0 44px;height:44px;border-radius:var(--r-sm);
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;
}
.contact-card.wa .ico{background:#e7f8ed;color:#25d366}
.contact-card.fb .ico{background:#e7eef8;color:#1877f2}
.contact-card.em .ico{background:var(--amber-light);color:var(--amber-dark)}
.contact-card.ph .ico{background:var(--steel-light);color:var(--navy)}
.contact-card h4{font-size:14.5px;color:var(--navy);margin-bottom:3px;font-weight:700}
.contact-card p{font-size:14px;color:var(--muted);word-break:break-word;line-height:1.55}
.contact-card a{font-size:14px;color:var(--text-2);word-break:break-all}
.contact-card a:hover{color:var(--amber-dark)}

/* ---------- Floating WhatsApp button ---------- */
.wa-float{
  position:fixed;bottom:24px;inset-inline-end:24px;z-index:999;
  display:inline-flex;align-items:center;gap:9px;
  background:#25d366;color:#fff;font-weight:700;font-size:14px;
  padding:13px 22px;border-radius:var(--r-full);
  box-shadow:0 8px 26px rgba(37,211,102,.42);
  transition:all .22s var(--ease);
}
.wa-float:hover{background:#1ebe5b;color:#fff;transform:translateY(-3px);box-shadow:0 12px 32px rgba(37,211,102,.5)}
.wa-float svg{width:20px;height:20px;flex:0 0 20px}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;bottom:24px;inset-inline-start:24px;z-index:998;
  width:46px;height:46px;border-radius:var(--r-full);
  background:var(--navy);color:#fff;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .28s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--navy-2);transform:translateY(-3px)}

/* ---------- Reveal on scroll ---------- */
/* JS 增强：仅在 JS 就绪后才启用淡入，默认必须可见（防止内容隐形） */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.js .reveal.visible{opacity:1;transform:none}
.reveal-d1{transition-delay:.08s}
.reveal-d2{transition-delay:.16s}
.reveal-d3{transition-delay:.24s}
.reveal-d4{transition-delay:.32s}

/* ---------- 404 page ---------- */
.error-page{
  min-height:62vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:var(--sp-8) var(--sp-5);
}
.error-page .code{
  font-size:clamp(72px,13vw,140px);font-weight:800;line-height:1;
  background:linear-gradient(140deg,var(--navy),var(--navy-4));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:var(--sp-4);letter-spacing:-3px;
}
.error-page h1{font-size:clamp(24px,3.4vw,34px);color:var(--navy);margin-bottom:var(--sp-3);font-weight:800}
.error-page p{color:var(--muted);max-width:520px;margin:0 auto var(--sp-6);font-size:16.5px}
.error-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- RTL overrides ---------- */
[dir="rtl"] body{font-family:"Inter","Noto Sans Arabic",Tahoma,Arial,sans-serif}
[dir="rtl"] .container{text-align:start}
[dir="rtl"] nav.main ul{flex-direction:row}
[dir="rtl"] .hero{text-align:start}
[dir="rtl"] .topbar .container{flex-direction:row-reverse}
[dir="rtl"] footer.site .footer-grid{direction:rtl}
[dir="rtl"] .breadcrumb{text-align:start}
[dir="rtl"] .feature-list li::after{
  transform:rotate(45deg);
  inset-inline-start:auto;inset-inline-end:5.5px;
}

/* ---------- Responsive ---------- */
@media(max-width:1080px){
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-5)}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-5)}
}
@media(max-width:900px){
  .contact-block{grid-template-columns:1fr}
  .why{grid-template-columns:1fr}
  .hero-grid-svg{display:none}
}
@media(max-width:760px){
  .container{padding-inline:var(--sp-4)}
  .grid,.grid-2,.grid-4,.form-row,.contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  nav.main{
    display:none;position:absolute;top:100%;inset-inline:0;
    background:#fff;border-bottom:1px solid var(--border);
    padding:var(--sp-4) var(--sp-4) var(--sp-5);
    box-shadow:var(--shadow-lg);
  }
  nav.main.open{display:block;animation:dropIn .22s var(--ease-out)}
  @keyframes dropIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
  nav.main ul{flex-direction:column;gap:2px;align-items:stretch}
  nav.main a{padding:12px 14px}
  .menu-toggle{display:block}
  .brand-sub{display:none}
  .brand-name{font-size:16px}
  .lang-switch{margin-inline-start:auto}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-4) var(--sp-5)}
  .hero-stat strong{font-size:22px}
  section{padding:48px 0}
  form.inquiry{padding:var(--sp-5)}
  .wa-float span{display:none}
  .wa-float{padding:15px;inset-inline-end:16px;bottom:16px}
  .to-top{bottom:88px;inset-inline-start:16px;width:42px;height:42px}
}
@media(max-width:420px){
  .hero-stats{grid-template-columns:1fr}
  .btn{width:100%}
}

/* ---------- Motion / print ---------- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;scroll-behavior:auto!important;
  }
  .reveal{opacity:1;transform:none}
}
@media print{
  header.site,.topbar,.wa-float,.to-top,nav.main,.menu-toggle{display:none!important}
  body{background:#fff;font-size:12pt}
  .hero,.page-hero{background:none!important;color:#000!important;padding:12pt 0}
  .hero p.lead,.page-hero p{color:#333!important}
  .card,.why-item,.faq-item{box-shadow:none;border:1px solid #ccc;break-inside:avoid}
  section{padding:12pt 0}
  a{color:#000;text-decoration:underline}
}

/* ============================================================
   v4 additions — B2B acquisition layer (2026-11-04)
   导航 CTA · 子导航 · 长文排版 · 流程步骤 · RFQ 表单 · 转化带
   ============================================================ */

/* ---------- Nav CTA + dropdown ---------- */
nav.main a.nav-cta{
  background:var(--amber);color:var(--navy);font-weight:800;
  margin-inline-start:8px;box-shadow:0 4px 12px rgba(245,158,11,.28);
}
nav.main a.nav-cta:hover{background:#fbbf24;color:var(--navy)}
nav.main li.has-drop{position:relative}
nav.main li.has-drop>ul{
  position:absolute;top:100%;inset-inline-start:0;min-width:250px;
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  box-shadow:var(--shadow-lg);padding:8px;display:none;z-index:120;
}
nav.main li.has-drop:hover>ul,
nav.main li.has-drop:focus-within>ul{display:block}
nav.main li.has-drop>ul a{
  padding:9px 12px;font-size:14px;font-weight:600;border-radius:var(--r-sm);
}
nav.main li.has-drop>ul a span{display:block;font-size:12px;color:var(--muted-2);font-weight:500}

/* ---------- Sub navigation (in-page anchors) ---------- */
.subnav{
  position:sticky;top:var(--header-h);z-index:60;background:#fff;
  border-bottom:1px solid var(--border);box-shadow:var(--shadow-xs);
}
.subnav .container{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.subnav .container::-webkit-scrollbar{display:none}
.subnav a{
  white-space:nowrap;padding:14px 13px;font-size:13.5px;font-weight:600;
  color:var(--text-2);border-bottom:2px solid transparent;
}
.subnav a:hover{color:var(--navy);border-bottom-color:var(--steel)}
.subnav a.hot{color:var(--amber-dark)}

/* ---------- Long-form prose ---------- */
.prose{max-width:840px}
.prose h2{
  color:var(--navy);font-size:clamp(22px,2.6vw,28px);font-weight:800;
  margin:var(--sp-7) 0 var(--sp-3);letter-spacing:-.3px;line-height:1.3;
}
.prose h2:first-child{margin-top:0}
.prose h3{
  color:var(--navy);font-size:19px;font-weight:700;margin:var(--sp-6) 0 var(--sp-2);
}
.prose p{margin-bottom:var(--sp-4);font-size:16px;line-height:1.78;color:var(--text-2)}
.prose ul,.prose ol{margin:0 0 var(--sp-4) 22px}
.prose li{margin-bottom:9px;line-height:1.72;color:var(--text-2);font-size:15.5px}
.prose strong{color:var(--navy)}
.prose .callout{
  background:var(--steel-lighter);border-inline-start:4px solid var(--amber);
  border-radius:0 var(--r-sm) var(--r-sm) 0;padding:var(--sp-4) var(--sp-5);
  margin:var(--sp-5) 0;font-size:15px;color:var(--text-2);
}
.prose .callout strong{color:var(--navy);display:block;margin-bottom:6px;font-size:14px;
  text-transform:uppercase;letter-spacing:.9px}

/* ---------- Steps / process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-4);counter-reset:st}
.step{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:var(--sp-5);position:relative;transition:all .24s var(--ease);
}
.step:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:var(--steel)}
.step::before{
  counter-increment:st;content:counter(st,decimal-leading-zero);
  display:block;font-size:13px;font-weight:800;color:var(--amber-dark);
  letter-spacing:1px;margin-bottom:10px;
}
.step h4{color:var(--navy);font-size:16px;font-weight:700;margin-bottom:7px}
.step p{color:var(--muted);font-size:14.5px;line-height:1.65}

/* ---------- Pill / chip list ---------- */
.pill-list{display:flex;flex-wrap:wrap;gap:9px}
.pill{
  background:#fff;border:1px solid var(--border-2);border-radius:var(--r-full);
  padding:7px 15px;font-size:13px;font-weight:600;color:var(--text-2);
  transition:all .2s var(--ease);
}
.pill:hover{border-color:var(--navy);color:var(--navy);background:var(--steel-lighter)}

/* ---------- Conversion band ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--navy),var(--navy-3));color:#fff;
  border-radius:var(--r-lg);padding:clamp(30px,4.4vw,48px);
  display:grid;grid-template-columns:1.5fr 1fr;gap:var(--sp-6);align-items:center;
  box-shadow:var(--shadow-lg);position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset-inline-end:-70px;top:-70px;width:230px;height:230px;
  border-radius:50%;background:radial-gradient(circle,rgba(245,158,11,.2),transparent 70%);
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.8vw,30px);font-weight:800;margin-bottom:12px;letter-spacing:-.4px}
.cta-band h2::after{background:var(--amber)}
.cta-band p{color:#c3d3e6;font-size:16px;line-height:1.7;margin-bottom:18px}
.cta-band .btn{width:100%}
.cta-band .contact-card{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.16)}
.cta-band .contact-card h4{color:#fff}
.cta-band .contact-card p{color:#a9bdd6}

/* ---------- Reference configuration cards ---------- */
.ref-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:var(--sp-5);transition:all .24s var(--ease);
}
.ref-card:hover{box-shadow:var(--shadow);border-color:var(--steel)}
.ref-card h4{color:var(--navy);font-size:16.5px;font-weight:700;margin-bottom:6px}
.ref-card .meta{font-size:12.5px;color:var(--muted-2);letter-spacing:.6px;text-transform:uppercase;font-weight:700;margin-bottom:10px}
.ref-card p{color:var(--muted);font-size:14.5px;line-height:1.66}

/* ---------- RFQ form ---------- */
.rfq-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-4)}
.rfq-grid .full{grid-column:1/-1}
.rfq-form{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:clamp(24px,3.4vw,38px);box-shadow:var(--shadow);
}
.rfq-form .field label{
  display:block;font-size:13px;font-weight:700;color:var(--navy);
  margin-bottom:7px;letter-spacing:.2px;
}
.rfq-form .field label .req{color:#e63946}
.rfq-form .field input,.rfq-form .field select,.rfq-form .field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--border-2);
  border-radius:var(--r-sm);font-size:15px;font-family:inherit;background:#fbfcfe;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.rfq-form .field input:focus,.rfq-form .field select:focus,.rfq-form .field textarea:focus{
  outline:none;border-color:var(--navy);background:#fff;box-shadow:0 0 0 3px rgba(10,37,64,.09);
}
.rfq-form .field textarea{min-height:130px;resize:vertical}
.rfq-form .field .hint{font-size:12px;color:var(--muted-2);margin-top:6px}
.rfq-form .actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:var(--sp-5)}
.rfq-form .actions .btn{flex:1 1 220px}
.rfq-msg{margin-top:var(--sp-4);font-size:14px;color:var(--muted)}
.rfq-msg.err{color:#e63946}
.rfq-msg.ok{color:#137333}

/* ---------- Sticky mobile inquiry bar ---------- */
.sticky-inquiry{
  display:none;position:fixed;inset-inline:0;bottom:0;z-index:995;
  background:#fff;border-top:1px solid var(--border);padding:10px 14px;
  box-shadow:0 -6px 20px rgba(10,37,64,.1);
}
.sticky-inquiry .container{display:flex;gap:10px}
.sticky-inquiry .btn{flex:1;padding:12px 16px;font-size:14px}

/* ---------- Market / region grid ---------- */
.market-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-4)}
.market{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:var(--sp-5);
}
.market h4{color:var(--navy);font-size:17px;font-weight:700;margin-bottom:4px}
.market .flag{font-size:24px;margin-bottom:10px;line-height:1}
.market p{color:var(--muted);font-size:14px;line-height:1.62}
.market .vols{margin-top:12px;font-size:13px;color:var(--navy);font-weight:700}

/* ---------- Table caption / notes ---------- */
.table-note{font-size:12.5px;color:var(--muted-2);margin-top:10px;line-height:1.6}
.spec-compact td,.spec-compact th{padding:11px 14px;font-size:13.5px}

/* ---------- Article meta ---------- */
.article-meta{
  display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:#9fb3cd;
  margin-top:14px;font-weight:600;
}
.article-meta span{display:inline-flex;align-items:center;gap:6px}

/* ---------- v4 responsive ---------- */
@media(max-width:1080px){
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .market-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{grid-template-columns:1fr}
}
@media(max-width:760px){
  .rfq-grid{grid-template-columns:1fr}
  .steps,.market-grid{grid-template-columns:1fr}
  .subnav{top:var(--header-h)}
  .wa-float{display:none}
  .sticky-inquiry{display:block}
  body{padding-bottom:66px}
  .to-top{bottom:150px}
}

/* ---------- Narrow phones (≤480px): prevent header overflow ---------- */
@media(max-width:480px){
  .brand{gap:9px}
  .brand-mark{width:38px;height:38px;flex:0 0 38px;font-size:17px}
  .brand-name{font-size:14px;letter-spacing:.2px}
  .menu-toggle{padding:8px 10px;font-size:18px}
  .lang-switch{margin-inline-start:auto;padding:2px;gap:1px}
  .lang-switch a{padding:4px 8px;font-size:11.5px}
  header.site .container{gap:var(--sp-3)}
  .topbar .container{gap:6px var(--sp-3)}
  .topbar span{font-size:11.5px}
  .trust-item{font-size:12.5px}
  .trust-item .dot{width:28px;height:28px;font-size:11px}
  .sticky-inquiry .container{gap:8px}
  .sticky-inquiry .btn{padding:11px 10px;font-size:13px}
}

/* ---------- RTL corrections ---------- */
[dir="rtl"] .hero-grid-svg{
  inset-inline-end:auto;inset-inline-start:-90px;transform:translateY(-50%) scaleX(-1);
}
[dir="rtl"] .feature-list li::before{transform:rotate(45deg)}
[dir="rtl"] .to-top{inset-inline-start:auto;inset-inline-end:16px}
[dir="rtl"] .wa-float{inset-inline-end:auto;inset-inline-start:16px}
[dir="rtl"] .brand{border-radius:0}
[dir="rtl"] .footer-bottom{text-align:start}