/* ===== HENGYE - B2B Factory Site (reference: wowohcool) ===== */
:root{
  --blue:#0066FF; --blue-2:#00A3FF;
  --navy:#0A1F44; --ink:#12233F; --muted:#6B7A90;
  --line:#E7ECF3; --bg:#FFFFFF; --bg-alt:#F5F8FC;
  --radius:14px; --shadow:0 8px 30px rgba(10,31,68,.08);
  --max:1200px;      /* legacy */
  --max-w:90vw;      /* content width = 90% of viewport */
  --max-cap:1600px;  /* cap on ultra-wide screens */
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei","Segoe UI",system-ui,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-feature-settings:"cv11","ss01";-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:min(var(--max-w),var(--max-cap));margin:0 auto;padding:0 24px}
.center{text-align:center;margin-top:36px}

/* ---- top bar ---- */
.topbar{background:var(--navy);color:#cdd8ea;font-size:12.5px}
.topbar-inner{max-width:min(var(--max-w),var(--max-cap));margin:0 auto;padding:9px 24px;display:flex;gap:10px;align-items:center}
.topbar i{margin:0 6px;opacity:.4;font-style:normal}
.topbar-right{margin-left:auto}
.topbar a:hover{color:#fff}

/* ---- header ---- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{max-width:min(var(--max-w),var(--max-cap));margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between}
.logo img{height:38px}
.nav{display:flex;align-items:center;gap:30px;font-size:15px;font-weight:700}
.nav a{color:var(--ink);transition:color .2s}
.nav a:hover{color:var(--blue)}
.nav-cta{background:var(--blue);color:#fff!important;padding:10px 20px;border-radius:10px}
.nav-cta:hover{background:#0052cc}

/* ---- language switcher ---- */
.lang-switch{display:flex;gap:4px;margin-left:18px;background:var(--bg-alt);border:1px solid var(--line);border-radius:9px;padding:3px}
.lang-switch button{border:none;background:transparent;font:inherit;font-size:12.5px;font-weight:700;color:var(--muted);padding:6px 11px;border-radius:7px;cursor:pointer;transition:.18s}
.lang-switch button:hover{color:var(--blue)}
.lang-switch button.on{background:var(--blue);color:#fff}

/* ---- hero ---- */
.hero{background:linear-gradient(180deg,#F7FAFF 0%,#fff 100%);padding:70px 0 60px;border-bottom:1px solid var(--line)}
.hero-inner{max-width:min(var(--max-w),var(--max-cap));margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-block;color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.09em;text-transform:uppercase;margin-bottom:16px}
.eyebrow.light{color:#9dc0ff}
.hero h1{font-size:48px;line-height:1.1;letter-spacing:-.025em;font-weight:900;color:var(--navy)}
.hero-sub{font-size:17.5px;color:var(--muted);margin:20px 0 22px;max-width:560px;font-weight:500}
.hero-bullets{list-style:none;display:flex;flex-direction:column;gap:10px;margin-bottom:30px}
.hero-bullets li{position:relative;padding-left:22px;font-size:14.5px;font-weight:600;color:var(--ink)}
.hero-bullets li::before{content:"\25B6";position:absolute;left:0;color:var(--blue);font-weight:800}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;padding:14px 28px;border-radius:11px;cursor:pointer;border:1.5px solid transparent;transition:.2s}
.btn-primary{background:var(--blue);color:#fff!important;box-shadow:0 8px 20px rgba(0,102,255,.25)}
.btn-primary:hover{background:#0052cc;transform:translateY(-1px)}
.btn-outline{border-color:var(--line);color:var(--navy)!important;background:#fff}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)!important}
.btn-block{width:100%}
.hero-badge{display:inline-block;margin-top:22px;font-size:12.5px;font-weight:700;color:var(--muted);background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:20px}
.hero-facts{display:flex;gap:32px;margin-top:26px;flex-wrap:wrap}
.hero-facts .hf{display:flex;flex-direction:column;gap:2px}
.hero-facts .hf b{font-size:26px;font-weight:900;color:var(--navy);letter-spacing:-.02em;line-height:1}
.hero-facts .hf span{font-size:11.5px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.hero-visual-inner{position:relative;background:linear-gradient(135deg,#0A1F44,#123a7a);border-radius:20px;aspect-ratio:4/3.4;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:flex-end;padding:26px}
.hv-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);background-size:38px 38px}
.hv-tag{position:absolute;top:22px;left:22px;background:rgba(255,255,255,.14);color:#fff;font-size:12px;font-weight:700;padding:7px 13px;border-radius:8px;border:1px solid rgba(255,255,255,.2)}
.hv-caption{position:relative;color:#cdd8ea;font-size:13.5px;font-weight:600}

/* ---- stats ---- */
.stats{background:var(--navy);color:#fff;padding:44px 0}
.stats-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;text-align:center}
.stat b{display:block;font-size:36px;font-weight:900;letter-spacing:-.02em;background:linear-gradient(180deg,#fff,#9dc0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:12.5px;color:#93a4c2;font-weight:600}

/* ---- sections ---- */
.section{padding:76px 0}
.section.alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:640px;margin:0 auto 46px}
.section-head h2{font-size:34px;font-weight:900;color:var(--navy);letter-spacing:-.015em}
.section-desc{color:var(--muted);margin-top:12px}
.eyebrow+.section-head h2{margin-top:0}

/* ---- certifications ---- */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cert{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 20px;text-align:center;transition:.2s}
.cert:hover{border-color:var(--blue);box-shadow:var(--shadow);transform:translateY(-3px)}
.cert-badge{display:inline-flex;align-items:center;justify-content:center;width:76px;height:76px;border-radius:50%;background:linear-gradient(135deg,#EAF2FF,#D8E7FF);color:var(--navy);font-weight:800;font-size:15px;margin-bottom:14px;border:2px solid #cfe0ff}
.cert p{font-size:13px;color:var(--muted);font-weight:600}

/* ---- logo wall ---- */
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.logo-ph{background:#fff;border:1px solid var(--line);border-radius:10px;height:74px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;letter-spacing:.06em;color:#9aa9bf}

/* ---- comparison ---- */
.compare{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.compare-col{border-radius:var(--radius);padding:30px 26px;border:1px solid var(--line);background:#fff}
.compare-col.good{background:linear-gradient(180deg,#0A1F44,#123a7a);color:#fff;border:none;box-shadow:0 16px 40px rgba(10,31,68,.22);transform:scale(1.03)}
.compare-col h3{font-size:20px;font-weight:900;margin-bottom:4px}
.compare-tag{display:inline-block;font-size:11.5px;font-weight:700;color:var(--muted);margin-bottom:20px}
.compare-col.good .compare-tag{color:#9dc0ff}
.compare-col ul{list-style:none;display:flex;flex-direction:column;gap:13px}
.compare-col li{position:relative;padding-left:26px;font-size:14px}
.compare-col li.x::before{content:"\2715";position:absolute;left:0;color:#f2555a;font-weight:800}
.compare-col li.v::before{content:"\2713";position:absolute;left:0;color:#3ddc97;font-weight:800}

/* ---- products ---- */
.prod-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.22s;display:flex;flex-direction:column}
.prod-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0ff}
.prod-thumb{height:130px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;letter-spacing:.1em;color:#fff;background:linear-gradient(135deg,#1a3a72,#0066FF)}
.prod-card h3{font-size:16.5px;font-weight:800;color:var(--navy);padding:16px 16px 4px}
.prod-card p{font-size:13px;color:var(--muted);padding:0 16px 18px;font-weight:600}

/* ---- odm ---- */
.odm-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.odm{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.2s;position:relative}
.odm:hover{border-color:var(--blue);box-shadow:var(--shadow)}
.odm-num{font-size:32px;font-weight:900;color:#dbe6f7;display:block;margin-bottom:12px}
.odm h3{font-size:17.5px;font-weight:800;color:var(--navy);margin-bottom:8px}
.odm p{font-size:14px;color:var(--muted)}

/* ---- cta / inquiry ---- */
.cta-section{background:linear-gradient(135deg,#0A1F44,#123a7a);padding:76px 0}
.cta-inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.cta-inner h2.light{color:#fff;font-size:34px;font-weight:900;letter-spacing:-.015em;margin:6px 0 14px}
.cta-inner p.light{color:#b9c8e2;font-size:16px;max-width:440px}
.inq-form{background:#fff;border-radius:18px;padding:30px;box-shadow:0 24px 60px rgba(0,0,0,.3)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.inq-form input,.inq-form select,.inq-form textarea{width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;transition:.2s}
.inq-form input:focus,.inq-form select:focus,.inq-form textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,102,255,.12)}
.inq-form textarea{resize:vertical;margin-bottom:16px}
.inq-form .hp{position:absolute;left:-9999px}
.form-note{font-size:12.5px;color:var(--muted);text-align:center;margin-top:12px}

/* ---- footer ---- */
.footer{background:#071733;color:#93a4c2;padding:60px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:36px}
.footer-logo{height:34px;margin-bottom:16px;filter:brightness(0) invert(1)}
.footer-desc{font-size:13.5px;line-height:1.7;max-width:280px}
.footer h4{color:#fff;font-size:14px;font-weight:800;margin-bottom:16px}
.footer-grid a,.footer-grid p{display:block;font-size:13.5px;margin-bottom:9px;color:#93a4c2}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);margin-top:44px;padding-top:22px;display:flex;justify-content:space-between;font-size:12.5px}

/* ---- floating whatsapp ---- */
.float-wa{position:fixed;right:22px;bottom:22px;width:54px;height:54px;border-radius:50%;background:#25D366;color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;box-shadow:0 8px 24px rgba(37,211,102,.45);z-index:60;transition:.2s}
.float-wa:hover{transform:scale(1.08)}

/* ---- responsive ---- */
@media(max-width:980px){
  .hero-facts{gap:22px;margin-top:20px}
  .hero-facts .hf b{font-size:21px}

  .hero-inner,.cta-inner{grid-template-columns:1fr;gap:36px}
  .stats-grid{grid-template-columns:repeat(3,1fr);gap:26px}
  .cert-grid,.logo-wall{grid-template-columns:repeat(2,1fr)}
  .compare,.odm-grid{grid-template-columns:1fr}
  .compare-col.good{transform:none}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .nav{display:none}
  .hero h1{font-size:34px}
  .header-inner{gap:10px;flex-wrap:wrap}
  .logo img{height:26px}
  .lang-switch{margin-left:auto}
}
@media(max-width:560px){
  .header-inner{padding:12px 16px}
  .lang-switch button{padding:5px 8px;font-size:11px}
  .topbar-inner{flex-wrap:wrap;font-size:11.5px}
  .hero h1{font-size:28px}
  .section{padding:52px 0}
  .section-head h2,.cta-inner h2.light{font-size:24px}
  .f-row{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-bottom{flex-direction:column;gap:8px}
}