/* ============================================================
   FEHT — fe2tech.com  |  style.css  v3.0.0  "SHIRO"
   Hướng: tối giản kiểu Nhật. Nền trắng, nhiều khoảng thở,
   đường kẻ mảnh thay cho khung hộp, chữ tiêu đề serif nhẹ.
   Màu lấy từ logo: teal #1C4952 · tan #D9A05D · xanh #85A34E
   Sửa token ở :root là đổi được toàn site.
   ============================================================ */

:root{
  /* --- nền --- */
  --paper:#FFFFFF;
  --paper-2:#FBFBF9;
  --paper-3:#F5F4F0;
  --paper-4:#EEEDE7;

  /* --- kẻ --- */
  --line:#E7E6E0;
  --line-2:#D6D4CC;
  --line-3:#B9B6AC;

  /* --- chữ --- */
  --ink:#16181A;
  --ink-2:#55585C;
  --ink-3:#8A8D8F;
  --ink-4:#A9ABAC;

  /* --- thương hiệu --- */
  --teal:#1C4952;
  --teal-2:#2F6C77;
  --teal-soft:#F1F5F5;
  --tan:#B9803C;
  --tan-2:#D9A05D;
  --tan-soft:#FBF4EA;
  --green:#6E8B3D;

  /* --- chữ --- */
  /* Typography lấy theo angus.vn: Inter cho toàn bộ, không serif, không mono.
     Giữ 3 tên biến cũ để không phải sửa lại 60 chỗ dùng.
     --f-display = tiêu đề (600-800) · --f-body = nội dung (400)
     --f-mono    = nhãn nhỏ in hoa (600-700) */
  --f-display:'Inter','SF Pro Display',-apple-system,system-ui,Helvetica,Arial,sans-serif;
  --f-body:'Inter','SF Pro Text',-apple-system,system-ui,Helvetica,Arial,sans-serif;
  --f-mono:'Inter','SF Pro Text',-apple-system,system-ui,Helvetica,Arial,sans-serif;

  --wrap:1200px;
  --pad:28px;
  --nav-h:84px;
  --r:0px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 24px)}
body{
  font-family:var(--f-body);font-size:16px;line-height:1.55;font-weight:400;
  color:var(--ink-2);background:var(--paper);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
::selection{background:var(--teal);color:#fff}
:focus-visible{outline:1px solid var(--teal);outline-offset:4px}

.wrap{max-width:var(--wrap);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}

/* ---------- KHUNG SECTION ---------- */
section{position:relative;padding:96px 0}
section > .wrap{position:relative;z-index:2}

.bg-grey{background:var(--paper-2)}
.bg-tealsoft{background:var(--paper-2)}
.bg-teal{background:var(--teal);color:rgba(255,255,255,.78)}
.bg-teal h2,.bg-teal h3{color:#fff}

/* ---------- CHỮ ---------- */
h1,h2,h3,h4{font-family:var(--f-display);font-weight:700;color:var(--ink);
  line-height:1.15;letter-spacing:-.02em}
h1{font-size:clamp(36px,4.7vw,60px);font-weight:800;line-height:1.15;letter-spacing:-.035em}
h1 em{font-style:normal;color:var(--teal);position:relative;white-space:nowrap}
h1 em::after{content:'';position:absolute;left:0;right:0;bottom:-.06em;height:1px;
  background:var(--tan-2)}
h2{font-size:clamp(28px,3.1vw,40px);font-weight:700;line-height:1.15;letter-spacing:-.025em}
h3{font-size:17.6px;font-weight:600;letter-spacing:-.02em}
h4{font-size:12.5px;font-weight:700;letter-spacing:.04em}

.lead{font-size:18.4px;color:var(--ink-2);max-width:60ch;line-height:1.55}
p{max-width:72ch}
strong,b{color:var(--ink);font-weight:600}

/* --- nhãn nhỏ --- */
.eyebrow{
  font-family:var(--f-mono);font-weight:700;font-size:12.5px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ink-3);display:block;margin-bottom:22px;
}
.bg-teal .eyebrow{color:rgba(255,255,255,.55)}

/* --- gạch mảnh dưới nhãn --- */
.rail{height:1px;width:44px;margin-bottom:30px;background:var(--line-3)}
.bg-teal .rail{background:rgba(255,255,255,.34)}

.sec-head{margin-bottom:52px;max-width:72ch}
.sec-head h2{margin-bottom:22px}

.num{font-family:var(--f-display);font-weight:700;letter-spacing:-.025em;font-variant-numeric:tabular-nums}

/* ô chưa có dữ liệu thật */
.tbd{background:var(--tan-soft);border-bottom:1px dotted var(--tan);
  padding:1px 6px;color:var(--tan);font-family:var(--f-mono);font-size:.86em;font-weight:600}

/* ---------- NÚT ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;
  font-family:var(--f-body);font-weight:400;font-size:14.1px;letter-spacing:.04em;
  text-transform:uppercase;padding:17px 34px;border-radius:var(--r);
  border:1px solid transparent;cursor:pointer;
  transition:background .3s,border-color .3s,color .3s}
.btn-amber{background:var(--teal);color:#fff;border-color:var(--teal)}
.btn-amber:hover{background:var(--ink);border-color:var(--ink)}
.btn-teal{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-teal:hover{border-color:var(--ink);background:transparent}
.bg-teal .btn-amber{background:#fff;color:var(--teal);border-color:#fff}
.bg-teal .btn-amber:hover{background:transparent;color:#fff;border-color:#fff}
.btn-ghost{border-color:var(--line-2);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}

/* ---------- DẢI RFQ 24H (trên cùng) ---------- */
.promo{background:var(--teal);color:rgba(255,255,255,.8);position:relative;z-index:70;overflow:hidden}
.promo .wrap{display:flex;align-items:center;justify-content:center;gap:10px 22px;flex-wrap:wrap;
  padding-top:13px;padding-bottom:13px;text-align:center;
  font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;text-transform:uppercase}
.promo b{color:#fff;font-weight:400}
.promo .p-short{display:none}
.promo .promo-mail{display:inline-flex;align-items:center;gap:9px;color:#fff;letter-spacing:.04em;
  border-bottom:1px solid rgba(255,255,255,.45);padding-bottom:2px;transition:border-color .25s}
.promo .promo-mail::before{content:'';width:16px;height:1px;background:var(--tan-2);flex-shrink:0}
.promo .promo-mail:hover{border-bottom-color:#fff}

/* ---------- TOPBAR ---------- */
.topbar{background:var(--paper);color:var(--ink-3);font-size:13.1px;
  border-bottom:1px solid var(--line);position:relative;z-index:60}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding-top:11px;padding-bottom:11px;flex-wrap:wrap}
.topbar a{transition:color .2s}
.topbar a:hover{color:var(--ink)}
.topbar .hours{font-family:var(--f-mono);font-weight:600;letter-spacing:.04em;font-size:12.5px;text-transform:uppercase}
.topbar .links{display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.04em}
.topbar .lang{display:inline-flex;gap:11px;padding-left:20px;border-left:1px solid var(--line)}
.topbar .lang a{color:var(--ink-4)}
.topbar .lang a.on{color:var(--ink)}

/* ---------- WHATSAPP ---------- */
.wa-ico{width:1em;height:1em;flex-shrink:0;fill:currentColor;display:block}

/* thanh trên cùng */
.topbar .links a.wa{display:inline-flex;align-items:center;gap:7px}
/* kênh phản ánh chất lượng phục vụ — để mờ, không cạnh tranh với kênh RFQ */
.topbar .links .t-fb{color:var(--ink-4)}
.topbar .links .t-fb:hover{color:var(--ink-2)}
.topbar .links a.wa .wa-ico{width:13px;height:13px;color:#25D366}

/* nút trong nội dung — nền trắng, viền mảnh, icon xanh; hover mới đổ xanh */
.btn-wa{background:transparent;border-color:var(--line-2);color:var(--ink)}
.btn-wa .wa-ico{width:16px;height:16px;color:#25D366;transition:color .3s}
.btn-wa:hover{background:#25D366;border-color:#25D366;color:#fff}
.btn-wa:hover .wa-ico{color:#fff}
.bg-teal .btn-wa{background:transparent;border-color:rgba(255,255,255,.42);color:#fff}
.bg-teal .btn-wa .wa-ico{color:#fff}
.bg-teal .btn-wa:hover{background:#25D366;border-color:#25D366;color:#fff}

/* nút nổi góc phải */
.wa-float{position:fixed;right:24px;bottom:24px;z-index:80;
  display:inline-flex;align-items:center;gap:11px;
  background:var(--paper);border:1px solid var(--line-2);border-radius:var(--r);
  padding:13px 19px;font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--ink);
  box-shadow:0 14px 36px -20px rgba(0,0,0,.55);
  transition:background .3s,border-color .3s,color .3s}
.wa-float .wa-ico{width:19px;height:19px;color:#25D366;transition:color .3s}
.wa-float:hover{background:#25D366;border-color:#25D366;color:#fff}
.wa-float:hover .wa-ico{color:#fff}

/* ---------- HIỆU ỨNG GỌI LIÊN HỆ ----------
   Hai chỗ nhấp nháy để kéo mắt: dải RFQ 24h trên đầu và nút WhatsApp nổi.
   Muốn tắt: xóa nguyên khối này. Muốn nháy mạnh hơn: giảm thời lượng
   của promoHot / waPulse xuống ~1.2s. Toàn bộ đã tự tắt khi máy khách
   bật prefers-reduced-motion (xem cuối file). */

/* dải RFQ: chữ "24 hours" đổi màu qua lại + vệt sáng quét ngang */
.promo b{animation:promoHot 2.2s ease-in-out infinite}
@keyframes promoHot{0%,100%{color:#fff}50%{color:var(--tan-2)}}

.promo::after{content:'';position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(105deg,transparent 38%,rgba(255,255,255,.15) 50%,transparent 62%);
  transform:translateX(-100%);animation:promoSheen 6.5s ease-in-out infinite}
@keyframes promoSheen{0%,74%{transform:translateX(-100%)}100%{transform:translateX(100%)}}

/* email trong dải: gạch chân sáng lên theo nhịp để lộ rõ là bấm được */
.promo .promo-mail{animation:promoMail 2.2s ease-in-out infinite}
@keyframes promoMail{
  0%,100%{border-bottom-color:rgba(255,255,255,.45);text-shadow:none}
  50%{border-bottom-color:var(--tan-2);text-shadow:0 0 16px rgba(217,160,93,.7)}}
.promo .promo-mail:hover{animation:none;border-bottom-color:#fff;text-shadow:none}

/* nút WhatsApp nổi: vòng sáng lan ra + thi thoảng nảy nhẹ một cái */
.wa-float{animation:waNudge 5s ease-in-out infinite}
.wa-float::after{content:'';position:absolute;inset:-3px;border-radius:var(--r);
  border:2px solid #25D366;opacity:0;pointer-events:none;
  animation:waRing 2.4s cubic-bezier(.22,.7,.28,1) infinite}
@keyframes waRing{
  0%{transform:scale(1);opacity:.6}
  70%{transform:scale(1.16);opacity:0}
  100%{transform:scale(1.16);opacity:0}}
@keyframes waNudge{
  0%,84%,100%{transform:scale(1)}
  89%{transform:scale(1.07)}
  94%{transform:scale(.985)}}
.wa-float:hover{animation:none;transform:none}
.wa-float:hover::after{animation:none;opacity:0}

/* cụm nút phụ dưới danh sách liên hệ */
.side-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.why-cta{display:flex;gap:14px;flex-wrap:wrap}
.side-cta .btn{padding:15px 26px;font-size:13.1px}

/* cụm nút giữa dải kêu gọi */
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.ctaband .cta-note{margin:30px auto 0;font-family:var(--f-mono);font-weight:600;font-size:12.5px;
  letter-spacing:.04em;text-transform:uppercase;color:rgba(255,255,255,.62)}
.ctaband .cta-note a{color:#fff;border-bottom:1px solid rgba(255,255,255,.34)}
.ctaband .cta-note a:hover{border-bottom-color:#fff}

/* chân trang */
.fsocial{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.fsocial .btn{padding:12px 20px;font-size:12.5px;letter-spacing:.05em}
.fgrid li a.fwa{display:inline-flex;align-items:center;gap:8px}
.fgrid li a.fwa .wa-ico{width:14px;height:14px;color:#25D366}

/* ---------- NAV ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);
  backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid var(--line);transition:box-shadow .3s,background .3s}
.nav.stuck{background:rgba(255,255,255,.97);box-shadow:0 1px 24px -14px rgba(0,0,0,.35)}
.nav > .wrap{display:flex;align-items:center;gap:24px;height:var(--nav-h)}

.logo{display:flex;align-items:center;gap:15px;flex-shrink:0}
.logo-mark{width:38px;height:auto;flex-shrink:0;display:block}
footer .logo-mark{width:34px}
.logo-txt{display:flex;flex-direction:column;line-height:1.15}
.logo-txt strong{font-family:var(--f-display);font-size:15.2px;font-weight:700;
  letter-spacing:.01em;color:var(--ink)}
.logo-txt span{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.02em;
  text-transform:uppercase;color:var(--ink-3);margin-top:4px}

.menu{display:flex;align-items:center;gap:2px;margin-left:auto}
.menu a{font-size:13.1px;font-weight:500;color:var(--ink-2);padding:10px 8px;white-space:nowrap;
  position:relative;transition:color .2s}
.menu a:hover{color:var(--ink)}
.menu a.on{color:var(--ink)}
.menu a.on::after{content:'';position:absolute;left:8px;right:8px;bottom:4px;height:1px;
  background:var(--tan-2)}
.nav .btn{flex-shrink:0;padding:13px 20px;font-size:13.1px}

.burger{display:none;background:none;border:1px solid var(--line-2);border-radius:var(--r);
  width:46px;height:42px;flex-direction:column;justify-content:center;align-items:center;gap:6px;
  margin-left:auto;cursor:pointer}
.burger span{display:block;width:18px;height:1px;background:var(--ink);transition:.25s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.mobile-menu{display:none;flex-direction:column;background:var(--paper);
  border-top:1px solid var(--line);padding:8px var(--pad) 26px}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:16px 2px;border-bottom:1px solid var(--line);font-size:14.7px;color:var(--ink-2)}
.mobile-menu a:last-child{border-bottom:0}

/* ============================================================
   HERO
   ============================================================ */
.hero{padding:96px 0 92px;background:var(--paper);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.hero h1{margin-bottom:28px}
.hero .sub{font-size:18.4px;color:var(--ink-2);max-width:52ch;margin-bottom:36px;line-height:1.55}

.hero-list{list-style:none;display:grid;gap:0;margin-bottom:38px;
  border-top:1px solid var(--line)}
.hero-list li{position:relative;padding:15px 0 15px 26px;font-size:14.7px;color:var(--ink-2);
  border-bottom:1px solid var(--line)}
.hero-list li::before{content:'';position:absolute;left:0;top:calc(1em + 8px);width:9px;height:1px;
  background:var(--tan-2)}

.hero-cta{display:flex;gap:16px;flex-wrap:wrap}

.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:saturate(.88)}

.float-stats{display:flex;margin-top:0;border-bottom:1px solid var(--line)}
.float-stats > div{padding:24px 34px 22px 0;display:flex;flex-direction:column;gap:8px}
.float-stats b{font-family:var(--f-display);font-size:38.4px;font-weight:700;color:var(--ink);
  line-height:1}
.float-stats span{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--ink-3)}

/* ---------- THANH SỐ LIỆU ---------- */
.trust{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:repeat(5,1fr)}
.trust-grid > div{padding:42px 24px;display:flex;flex-direction:column;
  align-items:center;gap:12px;text-align:center;border-right:1px solid var(--line)}
.trust-grid > div:last-child{border-right:0}
.trust-grid b{font-family:var(--f-display);font-size:clamp(30px,3.2vw,42px);font-weight:700;
  letter-spacing:-.025em;color:var(--ink);line-height:1}
.trust-grid span{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--ink-3)}

/* ---------- DẢI NGÀNH ---------- */
.strip{background:var(--paper);border-bottom:1px solid var(--line)}
.strip ul{list-style:none;display:flex;padding:0;flex-wrap:wrap;justify-content:center}
.strip li{font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);padding:26px 30px}

/* ---------- LƯỚI + THẺ ---------- */
.grid{display:grid;gap:0}
.g3{grid-template-columns:repeat(3,1fr)}
.grid > *{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.g3 > *:nth-child(3n){border-right:0}
.grid{border-top:1px solid var(--line)}

.card{background:transparent;padding:40px 42px 38px 0;position:relative;transition:background .3s}
.g3 > .card{padding-left:0}
.g3 > .card:not(:nth-child(3n+1)){padding-left:42px}
/* 2 cột — dùng khi một hàng chỉ còn 2 thẻ, tránh để hở một ô trống */
.g2{grid-template-columns:repeat(2,1fr)}
.g2 > *:nth-child(2n){border-right:0}
.g2 > .card{padding-left:0}
.g2 > .card:not(:nth-child(2n+1)){padding-left:42px}
.card .ico{width:26px;height:26px;color:var(--teal);margin-bottom:28px;opacity:.85}
.card h3{margin-bottom:10px}
.card p{font-size:14.7px;color:var(--ink-2);margin-top:14px;line-height:1.55}
.count{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);display:block;margin-bottom:16px}
.tol{font-family:var(--f-mono);font-weight:600;font-variant-numeric:tabular-nums;font-size:13.1px;letter-spacing:.03em;color:var(--ink-3);
  margin-top:24px !important;padding-top:18px;border-top:1px solid var(--line);line-height:1.55}

/* ---------- BẢNG MÁY ---------- */
.equip-layout{display:grid;grid-template-columns:1fr;gap:36px;align-items:start}
.tablewrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14.7px;min-width:560px}
thead th{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);text-align:left;padding:0 24px 16px 0;font-weight:600;
  border-bottom:1px solid var(--ink-3);white-space:nowrap}
tbody td{padding:19px 24px 19px 0;border-bottom:1px solid var(--line);color:var(--ink-2);
  vertical-align:middle}
tbody tr:last-child td{border-bottom:1px solid var(--line)}
tbody td:first-child{color:var(--ink)}
td.qty{font-family:var(--f-mono);font-weight:600;font-variant-numeric:tabular-nums;
  color:var(--ink);text-align:right;padding-right:0}

.spectable{min-width:680px}
.spectable td.mk{color:var(--ink);font-weight:600;font-family:var(--f-display);font-size:16px;
  white-space:nowrap;letter-spacing:.01em}
.spectable td.ty{color:var(--ink-2);font-size:14.7px}
.spectable td.env{font-family:var(--f-mono);font-weight:600;font-size:13.1px;color:var(--teal-2);white-space:nowrap;
  font-variant-numeric:tabular-nums;letter-spacing:.01em}
.spectable td.or{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-4);white-space:nowrap;text-align:right;padding-right:0}
.spectable tr.grouprow th{text-align:left;padding:34px 0 12px;font-family:var(--f-mono);
  font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--tan);
  font-weight:600;border-bottom:1px solid var(--line)}
.spectable tbody tr:first-child th{padding-top:22px}

.reference{background:var(--paper-2);padding:38px 42px}
.reference h3{margin-bottom:30px;font-size:16px}
.reference dl{display:grid;grid-template-columns:repeat(3,1fr);gap:0 48px}
.reference dl > div{display:flex;flex-direction:column;padding:16px 0;
  border-bottom:1px solid var(--line)}
.reference dl > div:nth-last-child(-n+3){border-bottom:0;padding-bottom:0}
.reference dt{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3)}
.reference dd{font-size:14.7px;color:var(--ink-2);margin-top:8px;line-height:1.55}
.refnote{margin-top:30px;padding-top:22px;border-top:1px solid var(--line);
  font-size:14.1px;color:var(--ink-3);line-height:1.55}

/* ---------- CHIA ĐÔI ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.split img{filter:saturate(.88)}

/* ---------- DANH SÁCH THÔNG SỐ ---------- */
.speclist{list-style:none;display:block;border-top:1px solid var(--line)}
/* nhãn đặt tuyệt đối để mọi nội dung sau nó (kể cả span.tbd) nằm chung một cột */
.speclist li{display:block;position:relative;padding:18px 0 18px 152px;
  border-bottom:1px solid var(--line);font-size:14.7px;color:var(--ink-2)}
.speclist li b{position:absolute;left:0;top:22px;width:132px;
  font-family:var(--f-mono);font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);font-weight:600;line-height:1.5}
.speclist li a{color:var(--teal);border-bottom:1px solid var(--line-2);transition:border-color .2s}
.speclist li a:hover{border-bottom-color:var(--teal)}
/* dòng phản ánh chất lượng phục vụ — kênh phụ, để mờ hơn kênh RFQ */
.speclist li.sl-fb{color:var(--ink-3);font-size:13.5px}
.speclist li.sl-fb a{color:var(--ink-2)}
.speclist li.sl-fb a:hover{border-bottom-color:var(--ink-2)}
.speclist.metro li{padding-left:158px}
.speclist.metro .q{position:absolute;left:112px;top:20px;
  font-family:var(--f-mono);font-weight:600;font-size:13.1px;color:var(--tan)}

/* ---------- VẬT LIỆU ---------- */
.matrow{display:grid;grid-template-columns:220px 1fr;gap:40px;align-items:baseline;
  padding:30px 0;border-bottom:1px solid var(--line)}
.matrow:first-of-type{border-top:1px solid var(--line)}
.matrow h3{font-size:18.4px}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{font-family:var(--f-mono);font-weight:600;font-size:13.1px;letter-spacing:.04em;color:var(--ink-2);
  background:transparent;border:1px solid var(--line-2);padding:7px 14px;
  transition:border-color .25s,color .25s}
.chip:hover{border-color:var(--teal);color:var(--teal)}

.matnote{margin-top:36px;font-size:14.7px;color:var(--ink-2);max-width:78ch;
  background:var(--paper-2);border-left:1px solid var(--tan-2);padding:26px 32px;line-height:1.55}

/* ---------- ẢNH XƯỞNG ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.shot{position:relative;background:transparent}
.shot img{width:100%;aspect-ratio:4/3;object-fit:cover;filter:saturate(.86)}
.shot.wide img{aspect-ratio:21/9}
.cap{padding:20px 0 0;display:flex;flex-direction:column;gap:6px}
.cap b{font-family:var(--f-display);font-size:14.7px;font-weight:600;color:var(--ink);
  letter-spacing:.01em}
.cap span{font-size:14.1px;color:var(--ink-3);line-height:1.5}

/* ---------- 4 BƯỚC QC ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);margin-bottom:60px;
  border-top:1px solid var(--ink-3)}
.step{padding:32px 32px 34px 0;position:relative}
.step:not(:first-child){padding-left:32px;border-left:1px solid var(--line)}
.step .n{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;color:var(--tan);
  display:block;margin-bottom:20px}
.step h3{font-size:16px;margin-bottom:12px}
.step p{font-size:14.7px;color:var(--ink-2);line-height:1.55}

/* ---------- Ô CẢNH BÁO ---------- */
.ncr{margin-top:56px;background:var(--paper-2);border-left:1px solid var(--tan-2);
  padding:38px 44px}
.ncr h3{margin-bottom:16px;font-size:20.8px}
.ncr p{color:var(--ink-2);max-width:86ch}

/* ---------- 3 NGUYÊN TẮC ---------- */
.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border-top:1px solid rgba(255,255,255,.22)}
.principle{padding:38px 44px 36px 0;position:relative}
.principle:not(:first-child){padding-left:44px;border-left:1px solid rgba(255,255,255,.16)}
.principle h3{color:#fff;margin-bottom:16px;max-width:18ch;font-size:17.6px}
.principle p{color:rgba(255,255,255,.72);font-size:14.7px;line-height:1.55}

/* ---------- SẢN PHẨM ---------- */
.showcase{display:grid;grid-template-columns:repeat(4,1fr);gap:34px}
.part{background:transparent}
.part img{width:100%;aspect-ratio:1;object-fit:cover;filter:saturate(.9);
  transition:opacity .35s}
.part:hover img{opacity:.86}
.part b{display:block;font-family:var(--f-display);font-size:14.7px;font-weight:600;color:var(--ink);
  padding:20px 0 6px;letter-spacing:.01em}
.part > span{display:block;font-family:var(--f-mono);font-weight:600;font-size:12.5px;color:var(--ink-3);
  line-height:1.55;letter-spacing:.03em}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:30px 48px 30px 0;position:relative;
  font-family:var(--f-display);font-size:17.6px;font-weight:600;color:var(--ink);
  transition:color .2s}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--teal)}
.faq summary::after{content:'';position:absolute;right:6px;top:50%;width:11px;height:1px;
  background:var(--ink-3)}
.faq summary::before{content:'';position:absolute;right:11px;top:50%;width:1px;height:11px;
  background:var(--ink-3);margin-top:-5px;transition:opacity .25s}
.faq details[open] summary::before{opacity:0}
.faq details p{padding:0 0 34px;color:var(--ink-2);font-size:14.7px;max-width:80ch}

/* ---------- VÌ SAO ---------- */
.why{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}
.why-item{display:flex;gap:26px;padding:34px 40px 36px 0;border-bottom:1px solid var(--line)}
.why-item:nth-child(even){padding-left:40px;border-left:1px solid var(--line)}
.why-item .n{font-family:var(--f-mono);font-weight:600;font-size:12.5px;color:var(--tan);
  flex-shrink:0;padding-top:6px;letter-spacing:.04em}
.why-item h3{margin-bottom:12px}
.why-item p{font-size:14.7px;color:var(--ink-2);line-height:1.55}

/* ---------- QUY TRÌNH 7 BƯỚC ---------- */
.flow{list-style:none;display:grid;grid-template-columns:repeat(7,1fr);position:relative;
  border-top:1px solid var(--line)}
.flow li{position:relative;padding:30px 20px 0 0}
.flow li::before{content:'';position:absolute;left:0;top:-1px;width:22px;height:1px;background:var(--tan-2)}
.s-n{display:block;font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;
  color:var(--ink-3);margin-bottom:18px}
.flow li h3{font-size:14.7px;margin-bottom:10px}
.flow li p{font-size:14.1px;color:var(--ink-3);line-height:1.55}

.leadtime{margin-top:56px;background:var(--paper-2);padding:32px 40px;
  display:flex;align-items:baseline;gap:48px;flex-wrap:wrap}
.lt-label{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);flex-shrink:0}
.lt-row{display:flex;gap:56px;flex-wrap:wrap;flex:1}
.lt-row > div{display:flex;flex-direction:column;gap:7px}
.lt-row b{font-family:var(--f-display);font-size:25.6px;font-weight:700;color:var(--ink);line-height:1.1}
.lt-row span{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3)}

/* ---------- DẢI KÊU GỌI ---------- */
.ctaband{text-align:center;padding:92px 0}
.ctaband h2{max-width:20ch;margin:0 auto 24px}
.ctaband p{margin:0 auto 34px;color:rgba(255,255,255,.7);max-width:66ch}
.ctaband .checklist{font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;
  text-transform:uppercase;color:rgba(255,255,255,.6);line-height:1.55}

/* ---------- RFQ ---------- */
.rfq-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:72px;align-items:start}
.plants{margin-top:34px;border-top:1px solid var(--line)}
.plant{padding:22px 0;display:flex;flex-direction:column;gap:8px;border-bottom:1px solid var(--line)}
.plant b{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);font-weight:600}
.plant span{font-size:14.7px;color:var(--ink-2);line-height:1.55}

form{background:var(--paper-2);border:1px solid var(--line);padding:44px 44px}
.bg-grey form{background:var(--paper)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}
.field{margin-bottom:26px;display:flex;flex-direction:column;gap:10px}
.field label{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3)}
.field input,.field textarea{font-family:var(--f-body);font-size:14.7px;font-weight:300;color:var(--ink);
  background:transparent;border:0;border-bottom:1px solid var(--line-2);border-radius:0;
  padding:10px 0;width:100%;transition:border-color .25s}
.field textarea{min-height:120px;resize:vertical;line-height:1.55}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-4);font-weight:300}
.field input:focus,.field textarea:focus{outline:none;border-bottom-color:var(--teal)}
.field input[type=file]{padding:12px 0;font-family:var(--f-mono);font-weight:600;font-size:13.1px;color:var(--ink-3)}
.field input[type=file]::file-selector-button{font-family:var(--f-mono);font-weight:600;font-size:12.5px;
  letter-spacing:.04em;text-transform:uppercase;background:transparent;color:var(--teal);
  border:1px solid var(--line-2);border-radius:0;padding:9px 16px;margin-right:18px;cursor:pointer}
.field small{font-size:13.1px;color:var(--ink-3)}
.hp{position:absolute;left:-9999px;opacity:0}
form .btn{margin-top:12px}

/* ---------- ĐẦU TRANG PHỤ ---------- */
.pagehead{padding:84px 0 76px;background:var(--paper);border-bottom:1px solid var(--line)}
.crumb{font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);display:block;margin-bottom:30px}
.pagehead h1{max-width:19ch;margin-bottom:28px}
.pagehead p{font-size:18.4px;color:var(--ink-2);max-width:58ch;line-height:1.55}

/* ---------- DÒNG THỜI GIAN ---------- */
.timeline{list-style:none;position:relative;padding-left:38px}
.timeline::before{content:'';position:absolute;left:0;top:10px;bottom:10px;width:1px;
  background:var(--line-2)}
.timeline li{position:relative;padding-bottom:36px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:'';position:absolute;left:-38px;top:11px;width:9px;height:1px;
  background:var(--tan-2)}
.timeline .yr{font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;color:var(--ink-3);
  display:block;margin-bottom:12px}
.timeline h3{margin-bottom:10px}
.timeline p{font-size:14.7px;color:var(--ink-2);line-height:1.55}

/* ---------- THƯ NGỎ ---------- */
.letter{border-left:1px solid var(--line-2);padding-left:40px}
.letter p{margin-bottom:22px;font-size:16px;color:var(--ink-2);line-height:1.55}
.letter .sign{font-family:var(--f-display);font-size:16px;font-weight:600;color:var(--ink);
  margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.portrait{aspect-ratio:4/5;max-width:320px;display:grid;place-items:center;text-align:center;
  padding:28px;border:1px solid var(--line);background:var(--paper-2)}

/* ---------- CHỨNG CHỈ ---------- */
.certgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.cert{background:transparent;display:flex;flex-direction:column}
.cert .thumb{aspect-ratio:4/3;display:grid;place-items:center;text-align:center;
  background:var(--paper-2);border:1px solid var(--line);font-family:var(--f-mono);font-weight:600;font-size:12.5px;
  color:var(--ink-3);line-height:1.55;padding:22px}
.cert .body{padding:24px 0 0;display:flex;flex-direction:column;gap:14px;flex:1}
.cert .body p{font-size:14.7px;color:var(--ink-2);flex:1}

.certmain{display:grid;grid-template-columns:.8fr 1.2fr;gap:52px;align-items:start;
  background:var(--paper-2);padding:44px 48px}
.certdoc{display:block;position:relative;border:1px solid var(--line);background:#fff;
  transition:border-color .3s}
.certdoc:hover{border-color:var(--line-3)}
.certdoc img{width:100%;height:auto;display:block}
.certfacts h3{font-size:20.8px;margin-bottom:28px}
.certfacts dl{display:grid;grid-template-columns:160px 1fr;gap:0 24px;margin-bottom:34px}
.certfacts dt{font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);padding:15px 0;border-bottom:1px solid var(--line)}
.certfacts dd{font-size:14.7px;color:var(--ink-2);padding:15px 0;border-bottom:1px solid var(--line);
  line-height:1.55}
.certfacts dl > :nth-last-child(-n+2){border-bottom:0}
.badge{display:inline-flex;align-items:center;gap:10px;font-family:var(--f-mono);font-weight:600;font-size:11.5px;
  letter-spacing:.05em;text-transform:uppercase;color:var(--green);padding:0;margin-bottom:20px}
.badge::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--green)}

/* ---------- 5 LÝ DO (why-us) ---------- */
.reasons{list-style:none;border-top:1px solid var(--line-3)}
.reason{display:grid;grid-template-columns:300px 1fr;gap:56px;
  padding:40px 0 42px;border-bottom:1px solid var(--line)}
.reason:last-child{border-bottom:0;padding-bottom:0}
.r-head{position:sticky;top:calc(var(--nav-h) + 26px)}
.r-n{font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;color:var(--tan);
  display:block;margin-bottom:16px}
.r-head h3{font-family:var(--f-display);font-size:20.8px;font-weight:700;line-height:1.15;
  letter-spacing:.005em;max-width:20ch}
.r-tag{margin-top:14px;font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--ink-3);line-height:1.55}
.r-body > p{font-size:14.7px;color:var(--ink-2);line-height:1.55;max-width:76ch}
.r-facts{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:0 40px;
  margin-top:28px;border-top:1px solid var(--line)}
.r-facts li{display:flex;flex-direction:column;gap:6px;padding:15px 0;
  border-bottom:1px solid var(--line)}
.r-facts li:nth-last-child(-n+2){border-bottom:0;padding-bottom:0}
.r-facts b{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);font-weight:600}
.r-facts span{font-size:14.7px;color:var(--ink-2);line-height:1.5}

/* mẫu báo cáo tuần */
.samplenote{background:var(--paper);border:1px solid var(--line);padding:32px 34px}
.sn-label{display:block;font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--tan);margin-bottom:20px}
.samplenote .speclist li{padding:15px 0 15px 118px;font-size:14.7px}
.samplenote .speclist li b{top:19px;width:100px}
.samplenote .speclist li:last-child{border-bottom:0;padding-bottom:0}

/* ---------- THỊ TRƯỜNG (markets) ---------- */
/* màu 5 thị trường — lấy từ bảng màu thương hiệu */
.s-us{background:var(--teal)}
.s-jp{background:var(--teal-2)}
.s-kr{background:var(--tan)}
.s-eu{background:var(--tan-2)}
.s-vn{background:var(--green)}

.sharewrap{margin-bottom:52px}
.sharebar{display:flex;height:14px;overflow:hidden}
.sharebar > span{display:block;height:100%}
.sharebar > span + span{box-shadow:-1px 0 0 var(--paper)}
.sharekey{list-style:none;display:flex;flex-wrap:wrap;gap:12px 34px;margin-top:20px;
  font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3)}
.sharekey li{display:inline-flex;align-items:center;gap:9px}
.sharekey i{width:9px;height:9px;flex-shrink:0;display:block}
.sharekey b{color:var(--ink);font-weight:600;font-family:var(--f-mono);letter-spacing:.04em}

.markets{border-top:1px solid var(--line-3)}
.market{display:grid;grid-template-columns:250px 1fr;gap:52px;
  padding:36px 0 38px;border-bottom:1px solid var(--line);align-items:start}
.market:last-child{border-bottom:0}
.m-head h3{font-family:var(--f-display);font-size:20.8px;font-weight:700;line-height:1.15}
.m-sub{display:block;margin-top:9px;font-family:var(--f-mono);font-weight:600;font-size:11.5px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--ink-3);line-height:1.55}
.m-pct{display:block;margin-top:18px;font-size:35.2px;line-height:1;color:var(--ink)}
.m-bar{display:block;height:5px;background:var(--paper-3);margin-top:14px;max-width:190px}
.m-bar i{display:block;height:100%}
.m-body > p{font-size:14.7px;color:var(--ink-2);line-height:1.55;max-width:76ch}
.m-body .chips{margin-top:20px}
.marketnote{margin-top:34px;padding-top:22px;border-top:1px solid var(--line);
  font-size:14.7px;color:var(--ink-3);line-height:1.55;max-width:80ch}

/* ---------- BẢN ĐỒ ---------- */
.mapbox{aspect-ratio:21/8;border:1px solid var(--line);background:var(--paper-2);
  display:grid;place-items:center;text-align:center;padding:26px}
.mapbox iframe{width:100%;height:100%;border:0;display:block}

/* ---------- BẢNG NHIỆT LUYỆN ---------- */
.htable{min-width:860px}
.htable td.pr{color:var(--ink);font-weight:600;font-family:var(--f-display);font-size:16px;
  letter-spacing:.01em;padding-right:32px}
.htable td.gr{font-family:var(--f-mono);font-weight:600;font-size:13.1px;color:var(--teal-2);
  letter-spacing:.01em;line-height:1.5}
.htable td.rs{font-family:var(--f-mono);font-weight:600;font-size:13.1px;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:.01em;line-height:1.5;padding-right:0}

/* ---------- TRANG VẬT LIỆU (/materials/) ---------- */
.crumb a{color:var(--ink-3);border-bottom:1px solid var(--line);transition:color .2s}
.crumb a:hover{color:var(--teal)}

.xtable{min-width:880px}
.xtable td.mk{color:var(--ink);font-weight:600}
.xtable .gsub{display:block;margin-top:5px;font-family:var(--f-mono);font-weight:600;
  font-size:11.5px;letter-spacing:.04em;text-transform:none;color:var(--ink-4);line-height:1.45}
.xtable td.cf{white-space:nowrap;text-align:right;padding-right:0}
.xok,.xchk{display:inline-flex;align-items:center;gap:8px;font-family:var(--f-mono);
  font-weight:600;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase}
.xok::before,.xchk::before{content:'';width:5px;height:5px;border-radius:50%;
  background:currentColor;flex-shrink:0}
.xok{color:var(--green)}
.xchk{color:var(--tan)}
.xavail{min-width:620px}

.gnotes{display:grid;grid-template-columns:repeat(2,1fr);gap:40px 56px}
.gnote h3{font-family:var(--f-display);font-size:16px;font-weight:700;margin-bottom:12px}
.gnote p{font-size:14.7px;color:var(--ink-2);line-height:1.6}
@media (max-width:900px){.gnotes{grid-template-columns:1fr;gap:30px}}

/* ---------- CHÂN TRANG ---------- */
footer{background:var(--paper-2);border-top:1px solid var(--line);padding:68px 0 0}
.fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:48px;padding-bottom:56px}
.fgrid h4{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:22px;font-weight:600}
.fgrid ul{list-style:none;display:grid;gap:11px}
.fgrid li{font-size:14.7px;color:var(--ink-2);line-height:1.5}
.fgrid li a{transition:color .2s}
.fgrid li a:hover{color:var(--ink)}
/* nhãn chức danh sau email trong chân trang */
.fgrid li .frole{font-family:var(--f-mono);font-weight:600;font-size:11.5px;
  letter-spacing:.04em;color:var(--ink-4);white-space:nowrap}
/* dòng phản ánh chất lượng phục vụ trong chân trang */
.fgrid li.ffb{margin-top:7px;padding-top:13px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--ink-3)}
.fgrid li.ffb b{display:block;margin-bottom:5px;font-family:var(--f-mono);font-weight:600;
  font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-4)}
.ftag{margin-top:22px;font-family:var(--f-display);font-size:16px;font-weight:600;color:var(--ink)}
.fcert{margin-top:18px;font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.04em;
  color:var(--ink-3);line-height:1.55;display:inline-flex;align-items:center;gap:9px}
.fcert::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--green);flex-shrink:0}
.copy{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;
  padding-top:28px;padding-bottom:32px;border-top:1px solid var(--line);
  font-family:var(--f-mono);font-weight:600;font-size:12.5px;letter-spacing:.04em;color:var(--ink-3)}
.copy .ver{color:var(--ink-4)}
.copy .dev{color:var(--ink-4)}
.copy .dev a{color:var(--ink-3);border-bottom:1px solid var(--line)}
.copy .dev a:hover{color:var(--ink)}

.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--teal);color:#fff;
  padding:14px 24px;font-size:14.1px;letter-spacing:.04em}
.skip:focus{left:0}
.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}

/* ============================================================
   HIỆN DẦN KHI CUỘN
   ============================================================ */
[data-reveal]{opacity:0;transform:translateY(14px);
  transition:opacity .9s cubic-bezier(.22,.7,.28,1),transform .9s cubic-bezier(.22,.7,.28,1)}
[data-reveal].in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  /* '*' KHÔNG bắt được ::before/::after — phải liệt kê ra, nếu không vệt sáng
     ở dải RFQ và vòng sáng nút WhatsApp vẫn chạy với người tắt hiệu ứng. */
  *,*::before,*::after{animation:none !important;transition:none !important}
  [data-reveal]{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1180px){
  .menu{display:none}
  .burger{display:flex}
  .nav .btn{display:none}
  .showcase{grid-template-columns:repeat(3,1fr)}
  .fgrid{grid-template-columns:1fr 1fr;gap:44px}
  .flow{grid-template-columns:repeat(4,1fr);gap:30px 0}
}
@media (max-width:1024px){
  section{padding:76px 0}
  .hero{padding:66px 0 70px}
  .pagehead{padding:64px 0 58px}
  .hero-grid{grid-template-columns:1fr;gap:56px}
  .hero-media{max-width:660px}
  .split,.rfq-grid{grid-template-columns:1fr;gap:48px}
  .reason{grid-template-columns:1fr;gap:24px;padding:34px 0 36px}
  .market{grid-template-columns:1fr;gap:22px;padding:30px 0 32px}
  .m-bar{max-width:none}
  .r-head{position:static}
  .r-head h3{max-width:34ch}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(odd){padding-left:0;border-left:0}
  .principles{grid-template-columns:1fr}
  .principle{padding:34px 0;border-left:0 !important;border-bottom:1px solid rgba(255,255,255,.16)}
  .why{grid-template-columns:1fr}
  .why-item:nth-child(even){padding-left:0;border-left:0}
  .gallery{grid-template-columns:repeat(2,1fr);gap:28px}
  .certgrid{grid-template-columns:1fr 1fr}
  .g3{grid-template-columns:repeat(2,1fr)}
  .g3 > *:nth-child(3n){border-right:1px solid var(--line)}
  .g3 > *:nth-child(2n){border-right:0}
  .g3 > .card:not(:nth-child(3n+1)){padding-left:0}
  .g3 > .card:nth-child(2n){padding-left:36px}
  .g2{grid-template-columns:1fr}
  .g2 > *{border-right:0}
  .g2 > .card:not(:nth-child(2n+1)){padding-left:0}
  .trust-grid{grid-template-columns:repeat(3,1fr)}
  .certmain{grid-template-columns:1fr;gap:40px;padding:40px 32px}
  .certdoc{max-width:400px}
  .reference dl{grid-template-columns:1fr 1fr;gap:0 36px}
  .reference dl > div:nth-last-child(-n+3){border-bottom:1px solid var(--line);padding-bottom:16px}
  .reference dl > div:nth-last-child(-n+2){border-bottom:0;padding-bottom:0}
}
@media (max-width:820px){
  .split{gap:40px}
  .matrow{grid-template-columns:1fr;gap:16px}
  .certgrid{grid-template-columns:1fr}
  .shot.wide img{aspect-ratio:16/10}
}
@media (max-width:680px){
  :root{--pad:20px;--nav-h:70px}
  section{padding:56px 0}
  .sec-head{margin-bottom:38px}
  .promo .wrap{gap:6px 10px;padding-top:11px;padding-bottom:11px;font-size:11px;letter-spacing:.01em}
  .promo .promo-mail::before{display:none}
  .promo .p-long{display:none}
  .promo .p-short{display:inline}
  /* dải RFQ đã mang email nổi bật — thanh dưới rút còn 1 dòng */
  .topbar .links a[href^='mailto']{display:none}
  .topbar .hours{display:none}
  .topbar .links{gap:14px;justify-content:flex-start}
  /* điện thoại: giữ 1 số + 1 email; WhatsApp đã có nút nổi */
  .topbar .links .t-alt,.topbar .links a.wa{display:none}
  .wa-float{right:16px;bottom:16px;padding:14px;gap:0}
  .wa-float span{display:none}
  .side-cta .btn,.cta-actions .btn,.fsocial .btn{flex:1 1 auto;justify-content:center}
  .cta-actions{gap:12px}
  footer{padding:52px 0 0}
  .hero{padding:52px 0 68px}
  .hero .sub{margin-bottom:34px}
  .hero-cta .btn{width:100%}
  .float-stats > div{flex:1;padding-right:20px}
  .float-stats b{font-size:28.8px}
  .g3,.gallery,.steps,.trust-grid,.flow{grid-template-columns:1fr}
  .g3 > *{border-right:0 !important}
  .g3 > .card{padding-left:0 !important;padding-right:0;padding-top:36px;padding-bottom:36px}
  .step{padding:26px 0 !important;border-left:0 !important;border-bottom:1px solid var(--line)}
  .showcase{grid-template-columns:1fr 1fr;gap:24px}
  .two{grid-template-columns:1fr;gap:0}
  form{padding:30px 22px}
  .ncr,.matnote{padding:28px 24px}
  .fgrid{grid-template-columns:1fr;gap:38px}
  .sharekey{gap:10px 22px;font-size:11.5px;letter-spacing:.04em}
  .m-pct{font-size:28.8px}
  .r-facts{grid-template-columns:1fr;gap:0}
  .r-facts li:nth-last-child(-n+2){border-bottom:1px solid var(--line);padding-bottom:15px}
  .r-facts li:last-child{border-bottom:0;padding-bottom:0}
  .samplenote{padding:26px 22px}
  .samplenote .speclist li{padding-left:0}
  .samplenote .speclist li b{width:auto}
  .speclist li{padding-left:0;padding-top:16px}
  .speclist li b{position:static;width:auto;display:block;margin-bottom:6px}
  .speclist.metro li{padding-left:0}
  .speclist.metro .q{display:none}
  .timeline{padding-left:28px}
  .timeline li::before{left:-28px}
  .letter{padding-left:24px}
  .ctaband{padding:62px 0}
  .leadtime{flex-direction:column;align-items:flex-start;gap:22px;padding:28px 24px}
  .lt-row{gap:30px}
  .certfacts dl{grid-template-columns:1fr;gap:0}
  .certfacts dt{border-bottom:0;padding-bottom:0}
  .certfacts dd{padding-top:5px}
  .reference{padding:32px 24px}
  .reference dl{grid-template-columns:1fr}
  .why-item{padding-right:0}
  .card{padding-right:0}
}