/* Hamitech — màu lấy từ tem tròn dán trên cột lọc */
:root{
  --navy:#12296f; --blue:#1d4fb8; --sky:#27a3dc; --mist:#e9f3fb; --ice:#f5f9fd;
  --ink:#101a33; --muted:#55617c; --line:#d8e2ee; --white:#fff; --steel:#c7d1dc;
  --amber:#c9720c; --radius:14px; --shadow:0 10px 30px rgba(18,41,111,.10);
  --wrap:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--white);color:var(--ink);font:400 17px/1.65 "Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Arial,sans-serif}
img{display:block;max-width:100%;height:auto}
a{color:var(--blue)}
h1,h2,h3{line-height:1.22;color:var(--navy);margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.4vw,3.3rem)}
h2{font-size:clamp(1.6rem,3vw,2.3rem)}
h3{font-size:1.18rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.2em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.sec{padding:clamp(48px,7vw,88px) 0}
.sec.tint{background:var(--ice)}
.sec.dark{background:var(--navy);color:#dbe6f7}
.sec.dark h2,.sec.dark h3{color:#fff}
.eyebrow{font-size:.82rem;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--blue);margin-bottom:.6em}
.dark .eyebrow{color:#7fd0f5}
.lead{font-size:1.1rem;color:var(--muted);max-width:720px}
.dark .lead{color:#c2d2ec}
.head{margin-bottom:34px}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 14px;z-index:99}

/* Nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:10px;border:1.5px solid transparent;font:inherit;font-weight:600;font-size:1rem;text-decoration:none;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn.main{background:var(--blue);color:#fff}
.btn.main:hover{background:var(--navy)}
.btn.line{border-color:var(--blue);color:var(--blue);background:#fff}
.btn.line:hover{background:var(--mist)}
.btn.lite{background:#fff;color:var(--navy)}
.btn.lite:hover{background:var(--mist)}
.btns{display:flex;flex-wrap:wrap;gap:12px}
:focus-visible{outline:3px solid var(--sky);outline-offset:2px}

/* Đầu trang */
.top{background:var(--navy);color:#cfdcf3;font-size:.86rem}
.top .wrap{display:flex;justify-content:space-between;gap:14px;padding-top:7px;padding-bottom:7px}
.top a{color:#fff;text-decoration:none;font-weight:600}
.bar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}
.bar .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:70px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy)}
.logo svg{width:34px;height:34px}
.logo b{font-size:1.32rem;letter-spacing:.09em;font-weight:700;line-height:1}
.logo small{display:block;font-size:.66rem;color:var(--muted);letter-spacing:.02em;margin-top:3px;font-weight:400}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:9px 13px;border-radius:8px;text-decoration:none;color:var(--ink);font-size:.97rem;font-weight:500}
.nav a:hover{background:var(--mist)}
.nav a[aria-current=page]{color:var(--blue);font-weight:600}
.nav a.cta{background:var(--blue);color:#fff;margin-left:8px;font-weight:600}
.nav a.cta:hover{background:var(--navy)}
.tog{display:none;background:none;border:1.5px solid var(--line);border-radius:8px;min-width:46px;min-height:44px;font:inherit;color:var(--navy);cursor:pointer}

/* Slider */
.hero{background:linear-gradient(180deg,var(--mist),#fff);overflow:hidden}
.slides{position:relative}
.slide{display:none;grid-template-columns:1.08fr .92fr;gap:40px;align-items:center;padding:clamp(30px,5vw,60px) 0}
.slide.on{display:grid;animation:fade .45s ease}
@keyframes fade{from{opacity:.25}to{opacity:1}}
.slide p{font-size:1.13rem;color:var(--muted);max-width:560px}
.slide figure{margin:0;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);aspect-ratio:5/5.2;background:var(--mist)}
.slide figure img{width:100%;height:100%;object-fit:cover}
.dots{display:flex;gap:8px;padding-bottom:26px}
.dots button{width:44px;height:30px;border:0;background:none;cursor:pointer;padding:0;display:flex;align-items:center}
.dots button::before{content:"";display:block;width:100%;height:4px;border-radius:4px;background:var(--steel)}
.dots button[aria-current=true]::before{background:var(--blue)}

/* Số liệu */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-top:-1px}
.facts div{padding:20px 22px;border-left:1px solid var(--line)}
.facts div:first-child{border-left:0}
.facts b{display:block;font-size:1.5rem;color:var(--navy);line-height:1.2}
.facts span{font-size:.92rem;color:var(--muted)}

/* Lưới, thẻ */
.g2{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:center}
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.g4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{margin-bottom:.35em}
.card p:last-child{margin-bottom:0}
.card p{color:var(--muted);font-size:.98rem}
.frame{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.frame img{width:100%}
figcaption,.cap{font-size:.86rem;color:var(--muted);margin-top:8px}

/* Dấu hiệu */
.sign{counter-reset:s}
.sign .card{position:relative;padding-top:50px}
.sign .card::before{counter-increment:s;content:counter(s);position:absolute;top:18px;left:22px;font-weight:700;color:var(--sky);font-size:1.3rem}

/* Sản phẩm */
.prod{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:inherit;transition:box-shadow .2s,transform .2s}
.prod:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.prod .ph{aspect-ratio:1/1;background:var(--mist);overflow:hidden}
.prod .ph img{width:100%;height:100%;object-fit:cover}
.prod .bd{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.prod .tag{align-self:flex-start;font-size:.76rem;font-weight:600;color:var(--blue);background:var(--mist);padding:3px 9px;border-radius:99px}
.prod h3{margin:0;font-size:1.12rem}
.prod .spec{font-size:.92rem;color:var(--muted);margin:0}
.price{margin-top:auto;padding-top:8px}
.price s{display:block;color:var(--muted);font-size:.9rem}
.price b{font-size:1.32rem;color:var(--navy)}
.prod .go{font-weight:600;color:var(--blue);font-size:.95rem}

/* Dòng chảy */
.flow{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
.flow li{position:relative;padding:58px 18px 0 0}
.flow li::before{content:"";position:absolute;top:21px;left:0;right:0;height:4px;background:linear-gradient(90deg,#3f8fd8,#7fd0f5)}
.flow li:last-child::before{right:50%}
.flow li::after{content:"";position:absolute;top:13px;left:0;width:20px;height:20px;border-radius:50% 50% 50% 0;transform:rotate(-45deg);background:#7fd0f5;border:3px solid var(--navy)}
.flow h3{font-size:1.05rem;margin-bottom:.3em}
.flow p{font-size:.94rem;color:#c2d2ec;margin:0}

/* Bảng */
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{border-collapse:collapse;width:100%;min-width:820px;font-size:.95rem}
th,td{padding:13px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--navy);color:#fff;font-weight:600;font-size:.88rem}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody th{font-weight:600}
tbody th a{color:var(--blue)}
td.num{white-space:nowrap;font-weight:700;color:var(--navy)}

/* Bước */
.steps{list-style:none;padding:0;margin:0;counter-reset:b;display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.steps li{counter-increment:b;border-top:3px solid var(--blue);padding-top:14px}
.steps li::before{content:"Bước " counter(b);display:block;font-size:.82rem;font-weight:600;color:var(--blue);margin-bottom:6px}
.steps b{display:block;color:var(--navy);margin-bottom:4px}
.steps span{font-size:.95rem;color:var(--muted)}

/* Công trình */
.names{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:0}
.names li{border:1px solid var(--line);background:#fff;border-radius:99px;padding:8px 16px;font-weight:500;font-size:.95rem;color:var(--navy)}
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gal figure{margin:0}
.gal img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:12px}

/* Hỏi đáp */
details{border-bottom:1px solid var(--line)}
summary{cursor:pointer;padding:17px 34px 17px 0;font-weight:600;color:var(--navy);list-style:none;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:4px;top:12px;font-size:1.5rem;color:var(--blue);font-weight:400}
details[open] summary::after{content:"–"}
details p{color:var(--muted);padding-right:30px}

/* Thông số */
.spec-list{margin:0;display:grid;grid-template-columns:160px 1fr;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.spec-list dt,.spec-list dd{margin:0;padding:12px 15px;border-bottom:1px solid var(--line)}
.spec-list dt{background:var(--ice);font-weight:600;font-size:.93rem;color:var(--navy)}
.spec-list dd{font-size:.97rem}
.spec-list dt:last-of-type,.spec-list dd:last-of-type{border-bottom:0}
.crumb{font-size:.9rem;color:var(--muted);padding-top:16px}
.crumb a{color:var(--muted)}
.note{border-left:4px solid var(--amber);background:#fff8ee;padding:14px 18px;border-radius:0 10px 10px 0;font-size:.97rem}
.pagehead{background:linear-gradient(180deg,var(--mist),#fff);padding:clamp(34px,5vw,60px) 0 26px}
.prose{max-width:760px}
.prose h2{margin-top:1.6em;font-size:1.6rem}
.prose h2:first-child{margin-top:0}

/* Biểu mẫu */
form{display:grid;gap:14px}
label{display:grid;gap:6px;font-weight:600;font-size:.95rem;color:var(--navy)}
input,select,textarea{font:inherit;font-weight:400;font-size:16px;color:var(--ink);padding:12px 13px;border:1.5px solid var(--steel);border-radius:9px;background:#fff;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--blue);outline:none}
.done{display:none;background:var(--mist);border-radius:10px;padding:14px 16px;font-size:.97rem}
.done.on{display:block}
.cta-band{background:var(--blue);color:#fff;border-radius:18px;padding:clamp(26px,4vw,44px);display:flex;justify-content:space-between;gap:24px;align-items:center;flex-wrap:wrap}
.cta-band h2{color:#fff;margin:0 0 .25em}
.cta-band p{margin:0;color:#dfe9fb}

/* Chân trang */
.foot{background:#0c1c50;color:#b9c8e6;font-size:.94rem;padding:52px 0 96px}
.foot h3{color:#fff;font-size:1rem}
.foot a{color:#dbe6f7}
.foot .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:34px}
.foot ul{list-style:none;padding:0;margin:0;display:grid;gap:7px}
.foot .logo{color:#fff;margin-bottom:12px}
.foot .logo small{color:#b9c8e6}
.foot .copy{border-top:1px solid #293b76;margin-top:32px;padding-top:16px;font-size:.86rem}

/* Thanh gọi nổi */
.dock{position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:9px}
.dock a{display:flex;align-items:center;justify-content:center;min-height:46px;padding:0 17px;border-radius:99px;color:#fff;text-decoration:none;font-weight:600;font-size:.94rem;box-shadow:0 6px 18px rgba(0,0,0,.2)}
.dock .c{background:var(--blue)}
.dock .z{background:#0a7cff}
.dock .b{background:var(--navy)}

@media (max-width:980px){
  .g3{grid-template-columns:repeat(2,1fr)}
  .g4,.gal{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:1fr;gap:0}
  .flow li{padding:0 0 22px 36px}
  .flow li::before{top:0;bottom:0;left:9px;right:auto;width:4px;height:auto;background:#3f8fd8}
  .flow li:last-child::before{right:auto;bottom:50%}
  .flow li::after{top:4px}
  .steps{grid-template-columns:1fr 1fr}
  .foot .cols{grid-template-columns:1fr 1fr}
  .tog{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 16px}
  .nav.on{display:flex}
  .nav a{padding:13px 10px}
  .nav a.cta{margin:6px 0 0;text-align:center}
}
@media (max-width:720px){
  body{font-size:16px}
  .wrap{padding:0 16px}
  .top .hide{display:none}
  .slide,.slide.on{grid-template-columns:1fr;gap:22px;padding-top:26px}
  .slide figure{aspect-ratio:4/3.4}
  .facts{grid-template-columns:1fr 1fr}
  .facts div{border-left:0;border-top:1px solid var(--line)}
  .facts div:nth-child(-n+2){border-top:0}
  .facts div:nth-child(even){border-left:1px solid var(--line)}
  .g2{grid-template-columns:1fr}
  .g3{grid-template-columns:1fr}
  .g4.sign{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .foot .cols{grid-template-columns:1fr}
  .spec-list{grid-template-columns:120px 1fr}
  .btns .btn{flex:1 1 auto}
  .dock{left:0;right:0;bottom:0;flex-direction:row;gap:0;background:#fff;box-shadow:0 -4px 14px rgba(0,0,0,.14)}
  .dock a{flex:1;border-radius:0;box-shadow:none;min-height:52px;padding:0 6px}
  .foot{padding-bottom:84px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}