/*
Theme Name: TATGAS Calibration
Theme URI: https://example.com/
Author: TAT GAS
Description: Landing-page WordPress theme for TAT standard calibration gases. Inspired by modern industrial gas websites, with a clean premium blue/white layout.
Version: 2.0.0
License: GPL-2.0-or-later
Text Domain: tatgas
*/
:root{
  --navy:#071a3a;
  --blue:#1455d9;
  --blue-2:#0b3fa9;
  --cyan:#20b8e6;
  --ink:#101827;
  --muted:#5c6779;
  --line:#e6ebf2;
  --bg:#f6f8fb;
  --white:#fff;
  --shadow:0 18px 50px rgba(7,26,58,.10);
  --radius:18px;
  --container:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#fff;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.65}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font:inherit}
.container{width:min(var(--container),calc(100% - 40px));margin-inline:auto}
.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:20px;top:20px;z-index:9999;background:#fff;padding:10px 14px}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(10,34,72,.08)}
.header-inner{height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;min-width:150px}
.brand img{width:146px;height:58px;object-fit:contain;object-position:left center}
.primary-nav{display:flex;align-items:center;gap:26px;font-size:13px;font-weight:800;text-transform:uppercase}
.primary-nav a{position:relative;padding:29px 0;color:#1d2b43}
.primary-nav a:after{content:"";position:absolute;left:0;right:100%;bottom:19px;height:2px;background:var(--blue);transition:.25s}
.primary-nav a:hover:after,.primary-nav a.active:after{right:0}
.header-cta{display:inline-flex!important;align-items:center;justify-content:center;gap:7px;background:#edf4ff;color:var(--navy)!important;border:1px solid #cbdcf8;padding:8px 12px;border-radius:9px!important;box-shadow:0 5px 16px rgba(20,85,217,.10);font-size:12px!important;font-weight:900!important;line-height:1;white-space:nowrap}
.header-cta:after{display:none!important}
.header-cta:hover{background:var(--blue);color:#fff!important;border-color:var(--blue);transform:translateY(-1px)}
.header-phone-icon{width:24px;height:24px;border-radius:7px;display:grid;place-items:center;background:#fff;color:var(--blue);font-size:12px}
.menu-toggle{display:none;border:0;background:none;font-size:26px;color:var(--navy)}
.hero{position:relative;overflow:hidden;background:linear-gradient(120deg,#061b3d 0%,#0c2e69 48%,#0e5bc5 100%);color:#fff}
.hero:before{content:"";position:absolute;width:650px;height:650px;border-radius:50%;right:-220px;top:-320px;background:rgba(32,184,230,.16);filter:blur(3px)}
.hero:after{content:"";position:absolute;inset:auto 0 0 0;height:120px;background:linear-gradient(transparent,rgba(0,0,0,.15))}
.hero-grid{position:relative;z-index:1;min-height:630px;display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center;padding:70px 0 90px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border:1px solid rgba(255,255,255,.25);border-radius:999px;background:rgba(255,255,255,.08);font-size:11px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:#50d6ff;box-shadow:0 0 0 5px rgba(80,214,255,.14)}
.hero h1{font-size:clamp(40px,5vw,66px);line-height:1.04;letter-spacing:-.04em;margin:20px 0 18px;max-width:680px}
.hero h1 em{font-style:normal;color:#55d9ff}
.hero p{font-size:17px;color:rgba(255,255,255,.78);max-width:650px;margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:10px;padding:13px 18px;font-weight:900;font-size:14px;transition:.25s;border:1px solid transparent}
.btn-primary{background:#fff;color:var(--navy)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.16)}
.btn-outline{border-color:rgba(255,255,255,.32);color:#fff;background:rgba(255,255,255,.06)}
.btn-outline:hover{background:#fff;color:var(--navy)}
.hero-media{position:relative}
.hero-card{position:relative;border:1px solid rgba(255,255,255,.18);padding:10px;border-radius:24px;background:rgba(255,255,255,.10);box-shadow:0 30px 80px rgba(0,0,0,.25);transform:rotate(1.2deg)}
.hero-card img{height:470px;width:100%;object-fit:cover;border-radius:17px}
.hero-badge{position:absolute;left:-22px;bottom:28px;background:#fff;color:var(--navy);border-radius:14px;padding:16px 18px;box-shadow:0 18px 40px rgba(0,0,0,.2);min-width:215px}
.hero-badge strong{display:block;font-size:14px}.hero-badge span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
.stats{background:#fff;box-shadow:0 12px 40px rgba(7,26,58,.08);position:relative;z-index:4;margin-top:-35px;border-radius:16px;padding:8px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:18px 20px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}.stat strong{display:block;font-size:25px;color:var(--navy);line-height:1.2}.stat span{display:block;color:var(--muted);font-size:12px;margin-top:4px}
.section{padding:92px 0}
.section-alt{background:var(--bg)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}
.section-kicker{font-size:11px;color:var(--blue);font-weight:900;letter-spacing:.16em;text-transform:uppercase}
.section-title{font-size:clamp(30px,3.2vw,42px);line-height:1.1;letter-spacing:-.035em;margin:8px 0 0;color:var(--navy)}
.section-desc{max-width:600px;color:var(--muted);font-size:15px;margin:10px 0 0}
.about-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:54px;align-items:center}
.about-image{position:relative}
.about-image img{width:100%;height:510px;object-fit:cover;border-radius:22px;box-shadow:var(--shadow)}
.about-image .image-note{position:absolute;right:-18px;bottom:25px;background:#fff;border-left:4px solid var(--blue);border-radius:12px;padding:14px 18px;box-shadow:0 16px 40px rgba(7,26,58,.15);max-width:240px;font-size:12px}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.feature{padding:18px;border:1px solid var(--line);border-radius:14px;background:#fff}
.feature-icon{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:#edf4ff;color:var(--blue);font-weight:900;margin-bottom:11px}
.feature h3{font-size:14px;margin:0 0 4px}.feature p{font-size:12px;color:var(--muted);margin:0}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:17px;overflow:hidden;transition:.25s;box-shadow:0 6px 20px rgba(7,26,58,.04)}
.product-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.product-image{height:220px;background:#edf3fb;overflow:hidden}.product-image img{width:100%;height:100%;object-fit:cover;transition:.45s}.product-card:hover .product-image img{transform:scale(1.04)}
.product-body{padding:19px}.product-code{font-size:10px;color:var(--blue);font-weight:900;letter-spacing:.12em;text-transform:uppercase}.product-body h3{font-size:18px;line-height:1.25;margin:6px 0 8px;color:var(--navy)}.product-body p{font-size:13px;color:var(--muted);margin:0 0 15px}.product-link{font-size:12px;color:var(--blue);font-weight:900}
.gas-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-top:28px}
.gas-chip{border:1px solid #dce5f3;background:#fff;border-radius:13px;padding:17px 13px;text-align:center;box-shadow:0 5px 18px rgba(7,26,58,.04)}
.gas-chip strong{display:block;font-size:18px;color:var(--navy)}.gas-chip span{font-size:11px;color:var(--muted)}
.source-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:15px}
.source-card{background:#fff;border:1px solid var(--line);border-radius:17px;overflow:hidden;box-shadow:0 7px 25px rgba(7,26,58,.05);display:flex;flex-direction:column}
.source-card img{height:190px;width:100%;object-fit:cover}
.source-body{padding:17px;flex:1}.source-body h3{font-size:15px;line-height:1.3;margin:0 0 8px;color:var(--navy)}.source-body p{font-size:12px;color:var(--muted);margin:0}
.source-tag{display:inline-flex;padding:5px 8px;border-radius:999px;background:#eef5ff;color:var(--blue);font-size:9px;font-weight:900;text-transform:uppercase;margin-bottom:9px}
.audience-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:15px}.audience{overflow:hidden;border-radius:17px;background:#fff;border:1px solid var(--line);text-align:left;transition:.2s;box-shadow:0 7px 25px rgba(7,26,58,.04)}.audience:hover{border-color:#bfd2f7;box-shadow:0 14px 34px rgba(7,26,58,.09);transform:translateY(-3px)}.audience-image{height:150px;background:#eaf1fb;overflow:hidden}.audience-image img{width:100%;height:100%;object-fit:cover;transition:.4s}.audience:hover .audience-image img{transform:scale(1.04)}.audience-body{padding:17px}.audience .num{font-size:10px;font-weight:900;color:var(--blue);letter-spacing:.12em}.audience strong{display:block;margin-top:5px;font-size:14px;color:var(--navy)}.audience span{display:block;font-size:11px;color:var(--muted);margin-top:5px;line-height:1.55}.audience a{display:inline-block;margin-top:12px;color:var(--blue);font-size:11px;font-weight:900}
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:step}
.step{position:relative;padding:24px;background:#fff;border:1px solid var(--line);border-radius:16px}.step:before{counter-increment:step;content:"0" counter(step);display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--navy);color:#fff;font-size:12px;font-weight:900}.step h3{font-size:15px;margin:15px 0 5px}.step p{font-size:12px;color:var(--muted);margin:0}
.cta{padding:0 0 92px}.cta-box{position:relative;overflow:hidden;border-radius:24px;background:linear-gradient(120deg,#061b3d,#0c48ac);color:#fff;padding:48px 52px;display:flex;align-items:center;justify-content:space-between;gap:35px}.cta-box:after{content:"";position:absolute;width:340px;height:340px;border:1px solid rgba(255,255,255,.14);border-radius:50%;right:-80px;top:-130px}.cta-box h2{font-size:32px;line-height:1.15;margin:0 0 10px;letter-spacing:-.03em}.cta-box p{margin:0;color:rgba(255,255,255,.74);max-width:650px;font-size:14px}
.footer{background:#061a3a;color:#fff;padding:58px 0 22px;border-top:4px solid #1455d9}.footer-grid{display:grid;grid-template-columns:1.35fr .8fr 1.05fr;gap:45px}.footer .brand{min-width:0;display:inline-flex}.footer-logo-wrap{display:inline-flex;padding:10px 14px;border-radius:12px;background:#fff;box-shadow:0 10px 28px rgba(0,0,0,.16)}.footer-logo-wrap .brand img{width:150px;height:58px;object-fit:contain}.footer-lead{max-width:470px;margin:17px 0 0;color:rgba(255,255,255,.67)!important}.footer h3{font-size:13px;text-transform:uppercase;letter-spacing:.12em;margin:3px 0 15px;color:#fff}.footer p,.footer li,.footer a{color:rgba(255,255,255,.68);font-size:12px}.footer a:hover{color:#fff}.footer ul{padding:0;margin:0;list-style:none;display:grid;gap:8px}.footer-mini-cta{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}.footer-btn{display:inline-flex!important;align-items:center;justify-content:center;padding:9px 13px;border-radius:9px;font-weight:900!important;font-size:11px!important}.footer-btn-zalo{background:#0068ff;color:#fff!important}.footer-btn-phone{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);color:#fff!important}.footer-contact-panel{margin-top:42px;padding:27px 30px;border:1px solid rgba(255,255,255,.12);background:linear-gradient(120deg,rgba(255,255,255,.07),rgba(20,85,217,.16));border-radius:18px;display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center}.footer-kicker{color:#55d9ff}.footer-contact-copy h2{margin:7px 0 8px;font-size:27px;line-height:1.15;color:#fff}.footer-contact-copy p{margin:0;max-width:680px;color:rgba(255,255,255,.68)!important}.footer-contact-actions{display:grid;grid-template-columns:1fr;gap:9px}.footer-contact-action{display:flex;align-items:center;gap:11px;padding:11px 13px;border-radius:11px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.10);color:#fff!important}.footer-contact-action:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}.contact-action-icon{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:#fff;color:var(--blue);font-weight:900;font-size:11px}.footer-contact-action strong,.footer-contact-action small{display:block}.footer-contact-action strong{font-size:12px;color:#fff}.footer-contact-action small{font-size:10px;color:rgba(255,255,255,.57);margin-top:2px}.footer-source-menu{margin-top:30px;padding:23px 0;border-top:1px solid rgba(255,255,255,.10);border-bottom:1px solid rgba(255,255,255,.10);display:grid;grid-template-columns:.7fr 1.3fr;gap:35px;align-items:center}.footer-source-menu h3{margin:0 0 7px}.footer-source-menu p{margin:0;color:rgba(255,255,255,.55)}.source-menu-links{display:flex;flex-wrap:wrap;gap:8px}.source-menu-links a{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border:1px solid rgba(255,255,255,.12);border-radius:999px;background:rgba(255,255,255,.045);font-size:10px;color:rgba(255,255,255,.72)}.source-menu-links a:hover{border-color:rgba(85,217,255,.55);color:#fff}.source-menu-links span{color:#55d9ff;font-weight:900}.source-menu-links b{color:rgba(255,255,255,.3)}.footer-details{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:20px}.footer-details div{padding:13px 15px;border-radius:11px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08)}.footer-details strong{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:#55d9ff;margin-bottom:4px}.footer-details span{display:block;font-size:11px;color:rgba(255,255,255,.58);line-height:1.5}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:25px;padding-top:17px;display:flex;justify-content:space-between;gap:15px;font-size:11px;color:rgba(255,255,255,.45)}
.floating{position:fixed;right:18px;bottom:22px;z-index:900;display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.float-contact{position:relative;display:flex;align-items:center;gap:9px;min-width:50px;height:50px;padding:5px 14px 5px 5px;border-radius:999px;color:#fff!important;box-shadow:0 12px 28px rgba(7,26,58,.22);font-weight:900;font-size:12px;transition:transform .2s,box-shadow .2s}
.float-contact:hover{transform:translateX(-4px);box-shadow:0 16px 32px rgba(7,26,58,.28)}
.float-icon{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.18);font-size:13px;letter-spacing:-.04em}
.float-label{padding-right:2px}
.float-zalo{background:#0068ff}
.float-whatsapp{background:#16b95f}
.float-phone{background:#0d397f}
.float-zalo:before,.float-whatsapp:before{content:"";position:absolute;inset:-4px;border-radius:999px;border:2px solid currentColor;opacity:.18;animation:floatPulse 2s infinite}
.float-whatsapp:before{animation-delay:.55s}
@keyframes floatPulse{0%,100%{transform:scale(.98);opacity:.18}50%{transform:scale(1.06);opacity:0}}
@media (max-width:1100px){.primary-nav{gap:16px}.header-cta{display:inline-flex!important}.hero-grid{gap:35px}.source-grid{grid-template-columns:repeat(3,1fr)}.audience-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:800px){.container{width:min(var(--container),calc(100% - 28px))}.header-inner{height:68px}.brand{min-width:125px}.brand img{width:125px;height:52px}.menu-toggle{display:block}.primary-nav{display:none;position:absolute;left:14px;right:14px;top:68px;background:#fff;border:1px solid var(--line);border-radius:13px;padding:8px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}.primary-nav.open{display:flex}.primary-nav a{padding:12px 13px}.primary-nav a:after{display:none}.primary-nav .header-cta{margin:6px 7px;padding:10px 12px!important}.hero-grid,.about-grid{grid-template-columns:1fr}.hero-grid{padding:55px 0 80px}.hero-card img{height:380px}.hero-badge{left:12px}.stats-grid{grid-template-columns:1fr 1fr}.stat:nth-child(2){border-right:0}.stat{border-bottom:1px solid var(--line)}.section{padding:70px 0}.section-head{display:block}.product-grid{grid-template-columns:1fr 1fr}.gas-strip{grid-template-columns:repeat(3,1fr)}.source-grid{grid-template-columns:1fr 1fr}.audience-grid{grid-template-columns:1fr 1fr}.process{grid-template-columns:1fr 1fr}.cta-box{display:block;padding:35px 28px}.cta-box .btn{margin-top:24px}.footer-grid{grid-template-columns:1fr 1fr}.footer-contact-panel,.footer-source-menu{grid-template-columns:1fr}}
@media (max-width:560px){.brand{min-width:0}.brand img{width:116px;height:48px}.primary-nav .header-cta{font-size:12px!important}.hero h1{font-size:39px}.hero p{font-size:15px}.hero-actions .btn{width:100%}.stats-grid,.feature-grid,.product-grid,.gas-strip,.source-grid,.audience-grid,.process,.footer-grid,.footer-details{grid-template-columns:1fr}.stat{border-right:0}.product-image{height:240px}.audience-image{height:180px}.about-image img{height:360px}.section-title{font-size:31px}.cta-box h2{font-size:27px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}.floating{right:12px;bottom:14px;gap:8px}.float-contact{width:50px;min-width:50px;height:50px;padding:5px;border-radius:50%;justify-content:center}.float-label{display:none}.float-icon{width:40px;height:40px}}