:root{
  --navy:#2E3790; --navy-d:#1F2668; --red:#E4262E; --red-d:#C11C23;
  --ink:#1B1F3B; --muted:#5B6180; --line:#E3E6F0; --bg:#FFFFFF; --soft:#F4F6FB;
  --r:14px; --w:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:"Be Vietnam Pro",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit}
.wrap{max-width:var(--w);margin:0 auto;padding:0 20px}

/* Song ngữ */
html[data-lang="vi"] [lang="en"], html[data-lang="en"] [lang="vi"]{display:none!important}

/* Nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:999px;font-weight:600;text-decoration:none;border:2px solid transparent;cursor:pointer;font-size:15px;font-family:inherit;transition:.15s}
.btn-red{background:var(--red);color:#fff}.btn-red:hover{background:var(--red-d)}
.btn-ghost{border-color:#fff;color:#fff}.btn-ghost:hover{background:#fff;color:var(--navy)}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-full{width:100%}

/* Thanh trên */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand img{height:44px;width:auto}
.brand b{display:block;color:var(--navy);font-size:17px;letter-spacing:.5px;line-height:1.1}
.brand small{color:var(--red);font-size:12px;font-weight:600}
.menu{display:flex;gap:18px;margin-left:auto}
.menu a{text-decoration:none;font-weight:500;font-size:15px;color:var(--ink)}
.menu a:hover{color:var(--red)}
.top-act{display:flex;align-items:center;gap:10px}
.lang{border:1.5px solid var(--navy);background:#fff;color:var(--navy);border-radius:8px;padding:5px 9px;font-weight:700;font-size:13px;cursor:pointer;font-family:inherit}
.burger{display:none;background:none;border:0;width:40px;height:40px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;padding:8px}
.burger i{display:block;height:2px;background:var(--navy);border-radius:2px}

/* Ảnh tạm */
.ph{position:relative;background:
  repeating-linear-gradient(135deg,#E6E9F4 0 14px,#EEF0F8 14px 28px);border-radius:var(--r);aspect-ratio:4/3;overflow:hidden}
.ph::after{content:attr(data-ph);position:absolute;inset:auto 10px 10px 10px;font-size:12px;color:var(--muted);background:rgba(255,255,255,.85);padding:4px 8px;border-radius:6px;text-align:center}
.ph-tall{aspect-ratio:4/5}
.ph-sq{aspect-ratio:1;width:96px;border-radius:12px}
.ph-sq::after{display:none}
.ph-logo{aspect-ratio:5/2;border-radius:10px}

/* Hero */
.hero{position:relative;min-height:600px;display:flex;align-items:center;color:#fff;overflow:hidden}
.ph-hero{position:absolute;inset:0;aspect-ratio:auto;border-radius:0;background:
  repeating-linear-gradient(135deg,#3A4499 0 22px,#333D91 22px 44px)}
.ph-hero::after{inset:auto auto 18px 18px;background:rgba(0,0,0,.35);color:#fff}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,26,80,.92) 0%,rgba(20,26,80,.6) 55%,rgba(20,26,80,.2) 100%)}
.hero-in{position:relative;padding-top:60px;padding-bottom:80px}
.eyebrow{display:inline-block;background:var(--red);padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:18px}
.hero h1{font-size:clamp(32px,5vw,54px);line-height:1.15;font-weight:800;max-width:720px}
.lead{font-size:18px;opacity:.92;max-width:600px;margin:18px 0 30px}
.hero-btn{display:flex;gap:12px;flex-wrap:wrap}

/* Số liệu */
.stats{background:var(--navy);color:#fff}
.stats-in{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding-top:28px;padding-bottom:28px;text-align:center}
.stats b{display:block;font-size:30px;font-weight:800}
.stats span{font-size:14px;opacity:.85}

/* Khối */
.sec{padding:84px 0}
.sec.alt{background:var(--soft)}
.kicker{color:var(--red);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:8px}
.kicker.light{color:#FFB3B6}
h2{font-size:clamp(26px,3.4vw,38px);line-height:1.2;color:var(--navy);margin-bottom:22px;font-weight:800}
.sec p+p{margin-top:12px}
.two{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center}
.ticks{list-style:none;margin-top:22px;display:grid;gap:10px}
.ticks li{padding-left:30px;position:relative}
.ticks li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:var(--red);color:#fff;font-size:13px;display:grid;place-items:center;font-weight:700}
.todo{color:#B26A00!important;font-style:italic}
.note{color:var(--muted);font-size:14px;margin:-12px 0 22px}

/* Thẻ sản phẩm */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:#fff;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(46,55,144,.12)}
.card .ph{border-radius:0}
.card h3{font-size:19px;color:var(--navy);padding:18px 20px 6px}
.card p{padding:0 20px 22px;color:var(--muted);font-size:15px}

/* Quy trình */
.flow{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:12px;counter-reset:s;margin-bottom:44px}
.flow li{background:var(--soft);border-radius:12px;padding:18px 14px;text-align:center;font-weight:600;font-size:14px;position:relative}
.flow li strong{display:block;font-size:15px;color:var(--navy)}
.flow li small{display:block;font-weight:400;color:var(--muted);font-size:13px;margin-top:4px;line-height:1.45}
.flow-note{margin:-28px 0 40px;font-size:14px;text-align:center}
.flow li b{display:grid;place-items:center;width:36px;height:36px;margin:0 auto 10px;border-radius:50%;background:var(--navy);color:#fff}
.machines{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.mc h3{font-size:17px;color:var(--navy);margin:14px 0 4px}
.mc p{font-size:14px}

/* Ngành */
.inds{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.inds div{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 12px;text-align:center}
.ic{font-size:34px;display:block;margin-bottom:8px}
.inds b{font-size:15px;color:var(--navy)}

/* Chứng chỉ */
.certs{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cert{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;border:1px solid var(--line);border-radius:var(--r);padding:28px}
.cert b{font-size:20px;color:var(--navy)}

/* Bảng chọn sóng */
.guide{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:16px}
.tbl{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);font-size:15px}
.tbl th{background:var(--navy);color:#fff;text-align:left;padding:12px 14px;font-weight:600;font-size:14px}
.tbl td{padding:12px 14px;border-top:1px solid var(--line);vertical-align:top}
.tbl td b{color:var(--navy)}
.upload input{padding:9px;background:var(--soft);border-style:dashed!important;cursor:pointer}
.upload-list{font-weight:400;color:var(--ink)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.form{position:relative}
.form-msg.err{background:#FDECEC;color:#A11A20}
.btn[disabled]{opacity:.6;cursor:wait}
.file-tip{font-size:13px;color:var(--muted);background:var(--soft);padding:10px 12px;border-radius:10px}
.file-tip a{color:var(--navy);font-weight:600}

/* Tin tức */
.news{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.nw{display:flex;flex-direction:column;gap:8px;padding:22px;border:1px solid var(--line);border-radius:var(--r);text-decoration:none;border-top:4px solid var(--red);transition:.2s}
.nw:hover{box-shadow:0 12px 26px rgba(46,55,144,.12);transform:translateY(-3px)}
.nw small{color:var(--muted);font-size:13px}
.nw b{color:var(--navy);font-size:16px;line-height:1.4}

/* Logo KH */
.logos{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}

/* Báo giá */
.quote{background:linear-gradient(135deg,var(--navy-d),var(--navy));color:#fff}
.quote h2{color:#fff}
.contact-big{font-size:20px;font-weight:600;margin-top:24px;line-height:2}
.contact-big a{text-decoration:none}
.form{background:#fff;color:var(--ink);border-radius:18px;padding:28px;display:grid;gap:14px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.form label{display:grid;gap:5px;font-size:13px;font-weight:600;color:var(--muted)}
.form input,.form select,.form textarea{font:inherit;font-size:15px;color:var(--ink);border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;background:#fff;min-height:44px;width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--navy)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.row.three{grid-template-columns:repeat(3,1fr)}
.consent{display:flex!important;grid-template-columns:none;align-items:flex-start;gap:10px!important;font-weight:400!important}
.consent input{width:20px;min-height:20px;margin-top:2px;flex:none}
.form-msg{background:#EAF7EE;color:#1E6B34;padding:10px 12px;border-radius:10px;font-size:14px}

/* Liên hệ */
.info{display:grid;grid-template-columns:120px 1fr;gap:12px 16px;font-size:16px}
.info dt{color:var(--muted);font-weight:600}
.info a{color:var(--navy);font-weight:600;text-decoration:none}
.map{width:100%;height:360px;border:0;border-radius:var(--r);background:var(--soft)}

/* Chân trang */
.foot{background:#141A50;color:#C9CDE6;padding:44px 0 20px;font-size:14px}
.foot a{color:#fff;text-decoration:none}
.foot-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;line-height:1.9}
.foot-brand{display:flex;gap:14px;align-items:flex-start}
.foot-brand img{height:62px;background:#fff;border-radius:8px;padding:5px}
.foot-brand b{color:#fff}
.copy{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:16px;font-size:12px;opacity:.7}

/* Nút nổi */
.float{position:fixed;right:16px;bottom:18px;display:grid;gap:10px;z-index:60}
.fl{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;color:#fff;text-decoration:none;font-weight:700;box-shadow:0 8px 20px rgba(0,0,0,.25)}
.zalo{background:#0068FF;font-size:13px}
.call{background:var(--red);font-size:22px}

/* Điện thoại / máy tính bảng */
@media (max-width:1000px){
  .menu{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:8px 20px 16px;border-bottom:1px solid var(--line);display:none;box-shadow:0 12px 24px rgba(0,0,0,.08)}
  .menu.open{display:flex}
  .menu a{padding:12px 0;border-bottom:1px solid var(--line)}
  .burger{display:flex}
  .cards{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(3,1fr)}
  .machines{grid-template-columns:repeat(2,1fr)}
  .inds{grid-template-columns:repeat(3,1fr)}
  .logos{grid-template-columns:repeat(3,1fr)}
  .news{grid-template-columns:repeat(2,1fr)}
  .guide{grid-template-columns:1fr}
  .two{grid-template-columns:1fr;gap:36px}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .sec{padding:56px 0}
  .top-act .btn-sm{display:none}
  .brand img{height:38px}
  .hero{min-height:520px}
  .lead{font-size:16px}
  .stats-in{grid-template-columns:repeat(2,1fr)}
  .stats b{font-size:24px}
  .cards,.certs{grid-template-columns:1fr}
  .flow{grid-template-columns:repeat(2,1fr)}
  .inds{grid-template-columns:repeat(2,1fr)}
  .logos{grid-template-columns:repeat(2,1fr)}
  .news{grid-template-columns:1fr}
  .tbl{font-size:14px}
  .tbl th,.tbl td{padding:10px}
  .row,.row.three{grid-template-columns:1fr}
  .row.three{grid-template-columns:repeat(3,1fr)}
  .form{padding:20px}
  .info{grid-template-columns:1fr;gap:2px}
  .info dd{margin-bottom:10px}
}