@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;600;700;800&display=swap');:root{--g:#087052;--d:#073e32;--p:#f0f7f2;--l:#dce9df;--t:#18332b}*{box-sizing:border-box}body{margin:0;font-family:'Be Vietnam Pro',Arial;color:var(--t);line-height:1.6}a{text-decoration:none;color:inherit}header{height:72px;padding:0 6%;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:white;border-bottom:1px solid var(--l);z-index:3}.brand{font-size:22px;color:var(--g)}nav{display:flex;gap:24px;font-size:13px}.btn{display:inline-block;background:var(--g);color:white;border:0;border-radius:8px;padding:12px 18px;font-weight:700;cursor:pointer}.alt{background:#d8ed85;color:var(--d)}section{padding:65px 8%}small{color:var(--g);font-weight:800;letter-spacing:2px;font-size:10px}h1{font-size:clamp(40px,5vw,60px);line-height:1.12}h1 em{color:var(--g);font-style:normal}h2{font-size:32px;line-height:1.2}.hero{background:linear-gradient(120deg,#f1f8f3,#dcece2);display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:35px;min-height:470px}.hero p{max-width:520px;color:#65766e}.art{height:280px;border-radius:24px;background:#c9dfcf;display:grid;place-items:center;font-size:60px;color:#e4f17f}.art div{background:#f9fbf7;padding:50px;color:#39747a;clip-path:polygon(50% 0,100% 35%,100% 100%,0 100%,0 35%);font-size:25px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.grid article,form,.panel{border:1px solid var(--l);border-radius:12px;padding:20px;background:white}.grid p,p{color:#65766e;font-size:13px}.pale{background:var(--p)}input,select,textarea{width:100%;padding:10px;border:1px solid var(--l);border-radius:7px;margin:5px 0 12px;font:inherit}.products{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-top:18px}.product{background:white;border:1px solid var(--l);border-radius:10px;padding:15px}.product .pic{height:90px;background:#e6f1e9;display:grid;place-items:center;font-size:38px}.product h3{font-size:13px;min-height:38px}.price{font-weight:800;color:var(--d)}.product button{width:100%}.quote{display:grid;grid-template-columns:.8fr 1.2fr;gap:30px}.quote form label{display:block;font-size:12px;font-weight:700}.hint{font-size:10px}footer{padding:25px 8%;display:flex;justify-content:space-between;color:#65766e}@media(max-width:750px){.hero,.quote{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.products{grid-template-columns:repeat(2,1fr)}nav{gap:9px;font-size:10px}section{padding:45px 5%}}

/* Máy tính điện mặt trời KT SOLAR */
.calculator{background:#f7faf8}
.calc-intro{max-width:720px}
.calc-layout{display:grid;grid-template-columns:1fr 1.1fr;gap:22px;align-items:start;margin-top:22px}
.calc-form{display:grid;gap:10px}
.calc-form label{display:block;font-size:13px;font-weight:700}
.calc-form input,.calc-form select{margin-top:7px}
.calc-form input[type=range]{padding:0;accent-color:var(--g)}
.calc-result{background:#fff;border:1px solid var(--l);border-radius:12px;padding:22px;min-height:280px}
.calc-empty{color:#65766e;font-size:14px;padding:35px 8px}
.result-head h3{margin:5px 0 18px;color:var(--d)}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.result-grid>div{background:var(--p);padding:13px;border-radius:9px}
.result-grid span,.cost-estimate span{display:block;color:#65766e;font-size:11px}
.result-grid strong{display:block;color:var(--d);font-size:17px;margin-top:4px}
.cost-estimate{border-top:1px solid var(--l);margin-top:16px;padding-top:15px}
.cost-estimate strong{display:block;color:var(--g);font-size:clamp(19px,2.5vw,25px);margin-top:5px}
.payback{font-size:13px}
.calc-disclaimer{font-size:10px;line-height:1.55;color:#718078}
.calc-warning{background:#fff4df;padding:10px;border-radius:8px;color:#79551a;font-size:12px}
.hidden{display:none!important}
@media(max-width:750px){.calc-layout{grid-template-columns:1fr}.result-grid{grid-template-columns:1fr 1fr}.calc-result{padding:16px}}

/* KT SOLAR 2.0 - nút tạo báo giá */
.calc-form label input[type=text],.calc-form label input[type=tel]{margin-top:7px}
.quote-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:14px}
.quote-actions .btn{flex:1 1 190px}
@media(max-width:520px){.quote-actions{display:grid}.quote-actions .btn{width:100%}}

/* KT SOLAR 2.1 – nhận diện thương hiệu */
header .brand{display:flex;align-items:center;min-width:190px}
header .brand img{display:block;width:205px;max-width:42vw;height:auto}
.footer-logo{display:block;width:190px;max-width:100%;height:auto;margin-bottom:8px}
@media(max-width:750px){
  header{height:auto;min-height:68px;padding:10px 4%;gap:10px;flex-wrap:wrap}
  header .brand img{width:155px;max-width:38vw}
  nav{flex-wrap:wrap;justify-content:flex-end}
}

/* KT SOLAR – logo hình ảnh chính thức do chủ website cung cấp */
header{min-height:116px;height:auto;gap:16px}
header .brand{display:flex;align-items:center;flex:0 0 auto}
header .brand img{display:block;width:180px;max-width:38vw;height:auto;object-fit:contain}
.footer-logo{width:155px;height:auto;object-fit:contain}
@media(max-width:750px){
  header{min-height:0;padding:10px 4%;align-items:center}
  header .brand img{width:118px;max-width:34vw}
  nav{flex:1}
}


/* KT SOLAR 2.1.1 – tăng kích thước logo chính thức */
header{min-height:132px;padding-top:12px;padding-bottom:12px}
header .brand img{width:210px;max-width:38vw;height:auto;object-fit:contain}
.footer-logo{width:180px;max-width:100%;height:auto;object-fit:contain}
@media(max-width:750px){
  header{min-height:0;padding:10px 4%;gap:12px}
  header .brand img{width:150px;max-width:42vw}
  nav{flex:1}
}
@media(max-width:420px){
  header .brand img{width:132px;max-width:40vw}
  nav{font-size:9px;gap:7px}
}


/* KT SOLAR 2.1.2 – giao diện đồng bộ với mẫu thương hiệu */
:root{
  --g:#079fbd;
  --d:#123477;
  --p:#f1f7fc;
  --l:#dce8f4;
  --t:#142c57;
}
body{color:var(--t);background:#fff}
header{
  min-height:112px;
  padding:12px 6%;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid #e8eef6;
}
header .brand img{width:210px;max-width:38vw}
nav a{font-weight:700;color:#122e67}
nav a:hover{color:#079fbd}
.hero{
  min-height:510px;
  padding:48px 6% 64px;
  grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:28px;
  background:linear-gradient(110deg,#f8fbff 0%,#edf7ff 58%,#dceeff 100%);
}
.hero h1{color:#102e6b;max-width:620px}
.hero h1 em{color:#079fbd}
.hero p{color:#405675;font-size:15px;max-width:570px}
.hero .btn{background:#079fbd;border-radius:11px;padding:14px 22px}
.hero .btn.alt{background:#fff;color:#123477;border:1px solid #079fbd}
.art{
  height:390px;
  overflow:hidden;
  display:block;
  border-radius:22px;
  background:#dceeff;
  box-shadow:0 14px 34px rgba(21,55,105,.13);
}
.art img{display:block;width:100%;height:100%;object-fit:cover}
.service-strip{
  position:relative;
  z-index:2;
  width:calc(100% - 8%);
  margin:-28px auto 20px;
  padding:20px 24px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:12px;
  border:1px solid #e1eaf5;
  border-radius:22px;
  background:#fff;
  box-shadow:0 10px 28px rgba(19,54,105,.12);
}
.service-item{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  min-height:64px;
  color:#123477;
  font-size:14px;
  line-height:1.4;
}
.service-item + .service-item{border-left:1px solid #e1eaf5}
.service-icon{
  flex:0 0 48px;
  width:48px;height:48px;
  display:grid;place-items:center;
  color:#0750bb;
  font-size:35px;
  font-weight:700;
}
@media(max-width:850px){
  .hero{grid-template-columns:1fr;min-height:0;padding:38px 6% 55px}
  .art{height:320px}
  .service-strip{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:-22px}
  .service-item:nth-child(3){border-left:0}
}
@media(max-width:520px){
  header{padding:10px 4%;gap:8px}
  header .brand img{width:142px;max-width:40vw}
  nav{font-size:10px;gap:8px}
  .hero{padding:32px 5% 48px;gap:20px}
  .hero h1{font-size:clamp(36px,10vw,48px)}
  .hero p{font-size:13px}
  .art{height:240px;border-radius:15px}
  .service-strip{width:92%;padding:13px 8px;gap:4px;border-radius:15px}
  .service-item{font-size:11px;gap:5px;min-height:58px}
  .service-icon{flex-basis:30px;width:30px;height:30px;font-size:25px}
  .service-item + .service-item{border-left:0}
}

/* KT SOLAR 2.1.3 – tinh chỉnh cân đối header, hero và dịch vụ */
header{
  min-height:94px;
  height:auto;
  padding:8px clamp(20px,5.5vw,84px);
  gap:24px;
}
header .brand img{
  width:176px;
  max-width:34vw;
  max-height:78px;
  object-fit:contain;
}
nav{
  align-items:center;
  gap:clamp(16px,2.2vw,32px);
  font-size:14px;
}
nav a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  white-space:nowrap;
  position:relative;
}
nav a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;
  background:#079fbd;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}
nav a:hover::after,nav a:focus-visible::after{transform:scaleX(1)}
.hero{
  min-height:500px;
  padding:52px clamp(24px,6vw,92px) 68px;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:clamp(28px,4vw,58px);
}
.hero h1{
  font-size:clamp(42px,4.6vw,62px);
  letter-spacing:-1.5px;
  margin:18px 0 22px;
}
.hero p{font-size:15px;line-height:1.75}
.hero .art{
  height:clamp(330px,31vw,430px);
  border-radius:24px;
  background:#e8f3fc;
}
.hero .art img{object-position:center center}
.service-strip{
  width:min(94%,1440px);
  margin:-30px auto 24px;
  padding:18px 22px;
  gap:8px;
  border-radius:20px;
}
.service-item{
  justify-content:flex-start;
  padding:8px 14px;
  gap:13px;
  font-size:13px;
  color:#123477;
}
.service-icon{
  flex:0 0 48px;
  width:48px;height:48px;
  border-radius:14px;
  background:#edf6ff;
  color:#0750bb;
  font-size:30px;
}
.service-item strong{font-weight:700}
@media(max-width:850px){
  header{min-height:82px;padding:9px 4%;gap:12px}
  header .brand img{width:145px;max-width:32vw;max-height:66px}
  nav{gap:12px;font-size:12px}
  .hero{padding:40px 5% 58px;gap:24px}
  .hero .art{height:320px}
  .service-strip{width:92%;padding:13px 12px}
  .service-item{padding:7px;justify-content:flex-start}
}
@media(max-width:560px){
  header{padding:9px 4%;min-height:0;align-items:center}
  header .brand img{width:126px;max-width:34vw;max-height:58px}
  nav{flex:1;justify-content:flex-end;gap:8px;font-size:10px}
  nav a{min-height:34px}
  .hero{padding:30px 5% 48px;gap:20px}
  .hero h1{font-size:clamp(34px,9vw,45px);letter-spacing:-.8px;margin:14px 0 16px}
  .hero p{font-size:13px;line-height:1.65}
  .hero .art{height:235px;border-radius:16px}
  .service-strip{width:92%;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px;margin-top:-20px;padding:10px 7px}
  .service-item{font-size:10px;line-height:1.35;min-height:58px;gap:7px}
  .service-icon{flex-basis:34px;width:34px;height:34px;border-radius:10px;font-size:22px}
}
@media(max-width:380px){
  nav{gap:5px;font-size:9px}
  header .brand img{width:112px}
  .service-item{font-size:9px}
}


/* KT SOLAR 2.1.4 – Professional Plus */
header{min-height:102px;padding:9px clamp(20px,5.5vw,84px);box-shadow:0 5px 22px rgba(18,52,105,.045)}
header .brand img{width:198px;max-width:36vw;max-height:84px}
nav{gap:clamp(13px,1.9vw,28px)}
nav a{font-size:14px;font-weight:750;transition:color .2s ease}
nav a:hover{color:#079fbd}
nav a:focus-visible,.project-copy a:focus-visible,.contact-float a:focus-visible{outline:3px solid #f4a62a;outline-offset:4px;border-radius:5px}
.projects-section{padding:76px clamp(22px,6vw,92px) 64px;background:linear-gradient(180deg,#f7fbff 0%,#fff 100%)}
.section-heading{max-width:760px;margin:0 auto 30px;text-align:center}
.section-heading small,.project-copy small{font-weight:800;letter-spacing:1.5px;color:#079fbd;font-size:11px}
.section-heading h2{font-size:clamp(27px,3.3vw,40px);line-height:1.2;color:#123477;margin:12px 0}
.section-heading p{color:#5b6d87;line-height:1.7;margin:0}
.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;max-width:1320px;margin:0 auto}
.project-card{overflow:hidden;border:1px solid #e2ebf5;border-radius:19px;background:#fff;box-shadow:0 12px 30px rgba(20,54,105,.07);transition:transform .22s ease,box-shadow .22s ease}
.project-card:hover{transform:translateY(-5px);box-shadow:0 18px 38px rgba(20,54,105,.12)}
.project-visual{height:178px;position:relative;display:flex;align-items:flex-end;padding:20px;color:#fff;overflow:hidden}
.project-visual::before,.project-visual::after{content:"";position:absolute;inset:0}
.project-visual::before{background:linear-gradient(135deg,#0c367e,#079fbd)}
.project-visual::after{opacity:.48;background:repeating-linear-gradient(135deg,transparent 0 24px,rgba(255,255,255,.24) 25px 27px)}
.project-visual-home::before{background:linear-gradient(135deg,#123477,#12a8c2)}
.project-visual-business::before{background:linear-gradient(135deg,#174c91,#51a9d4)}
.project-visual-farm::before{background:linear-gradient(135deg,#087b72,#70b84d)}
.project-visual span{position:absolute;top:17px;left:20px;font-size:12px;font-weight:800;letter-spacing:1px;z-index:1;opacity:.8}
.project-visual b{font-size:23px;letter-spacing:1px;z-index:1}
.project-copy{padding:22px}
.project-copy h3{font-size:19px;color:#123477;margin:9px 0}
.project-copy p{font-size:13px;line-height:1.7;color:#5b6d87;min-height:66px;margin:0 0 16px}
.project-copy a{font-size:13px;font-weight:800;color:#078eae;text-decoration:none}
.project-copy a span{font-size:18px;margin-left:4px}
.project-note{max-width:1320px;margin:22px auto 0;color:#74839a;font-size:11px;line-height:1.6;text-align:center}
.contact-float{position:fixed;right:18px;bottom:24px;z-index:20;display:grid;gap:10px}
.contact-float a{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;text-decoration:none;color:#fff;font-size:25px;font-weight:800;box-shadow:0 7px 20px rgba(15,43,90,.2);transition:transform .2s ease}
.contact-float a:hover{transform:translateY(-3px)}
.contact-float-phone{background:#e73535}
.contact-float-zalo{background:#0877e8;font-size:21px!important}
@media(max-width:850px){
 header{min-height:86px}
 header .brand img{width:172px;max-width:34vw}
 nav{gap:10px}
 nav a{font-size:12px}
 .project-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:560px){
 header{padding:9px 4%;gap:8px}
 header .brand img{width:140px;max-width:35vw;max-height:62px}
 nav{gap:6px;font-size:10px}
 nav a{font-size:10px;min-height:32px}
 .projects-section{padding:52px 5% 44px}
 .project-grid{grid-template-columns:1fr;gap:15px}
 .project-visual{height:150px}
 .project-copy{padding:18px}
 .project-copy p{min-height:0}
 .contact-float{right:12px;bottom:16px;gap:8px}
 .contact-float a{width:43px;height:43px}
}


/* KT SOLAR 2.2 — professional blue/white visual system */
:root{--g:#0754b8;--d:#082e70;--p:#f1f7ff;--l:#d9e7f6;--t:#102d5b;--accent:#f28a16;--sky:#eaf5ff}
body{color:var(--t);background:#fff;font-family:'Be Vietnam Pro',Arial,sans-serif}
.topbar{min-height:38px;padding:7px 5%;display:flex;align-items:center;gap:28px;background:#073c87;color:#fff;font-size:12px;font-weight:600;flex-wrap:wrap}
.topbar a{color:#fff}.topbar-tag{margin-left:auto;color:#d6ecff}
header{height:88px;padding:8px 5%;border-bottom:1px solid #e7eef7;box-shadow:0 3px 14px #082e7010}
.brand{display:flex;align-items:center;min-width:210px}.brand img{display:block;width:225px;max-width:28vw;height:auto;max-height:70px;object-fit:contain}
nav{gap:clamp(10px,1.8vw,26px);align-items:center;font-size:13px;font-weight:700;color:#102f68}nav a{white-space:nowrap}nav a:hover{color:#0877d8}
.btn{background:linear-gradient(135deg,#087fd0,#0754b8);border-radius:12px;padding:13px 20px;box-shadow:0 5px 14px #0754b822;transition:transform .2s,box-shadow .2s}.btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px #0754b833}.alt{background:#fff;color:#0754b8;border:1px solid #0754b8;box-shadow:none}
.hero{position:relative;overflow:hidden;min-height:480px;padding:56px 6% 36px;grid-template-columns:.95fr 1.05fr;gap:36px;background:linear-gradient(112deg,#f5fbff 0%,#e4f3ff 48%,#d8edff 100%)}
.hero:before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 62% 14%,#fff8 0,transparent 24%);pointer-events:none}.hero>div{position:relative;z-index:1}.hero small{color:#0874c7;font-size:12px}.hero h1{font-size:clamp(40px,4.3vw,64px);font-weight:800;letter-spacing:-1.8px;color:#082e70;margin:16px 0 18px}.hero h1 em{color:#079bd0}.hero p{font-size:15px;line-height:1.75;color:#415b7b;max-width:560px}.hero .btn{margin-top:12px;margin-right:8px}.hero .alt{background:#fff}.art{height:350px;border-radius:22px;background:#d6ecfb;overflow:hidden;box-shadow:0 18px 45px #073e3220}.art img{width:100%;height:100%;object-fit:cover;display:block}
.service-strip{position:relative;z-index:2;margin:-5px 5% 20px;padding:18px 22px;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;background:#fffffff2;border:1px solid #dbeaff;border-radius:18px;box-shadow:0 12px 35px #0c3e7520}.service-item{display:flex;align-items:center;justify-content:center;gap:12px;padding:6px 10px;border-right:1px solid #dce8f7;color:#073e91;font-size:13px}.service-item:last-child{border:0}.service-icon{font-size:30px;color:#0878d1}
section{padding:58px 6%}.projects-section{padding-top:42px}.section-heading{text-align:center;max-width:850px;margin:0 auto 28px}.section-heading small{color:#0878c9}.section-heading h2{color:#082e70;font-size:clamp(25px,3vw,36px);margin:8px 0}.section-heading p{font-size:14px}.project-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.project-card{overflow:hidden;background:#fff;border:1px solid #dce8f5;border-radius:17px;box-shadow:0 8px 24px #0b397410;transition:transform .2s,box-shadow .2s}.project-card:hover{transform:translateY(-4px);box-shadow:0 15px 32px #0b39741c}.project-visual{height:205px;position:relative;overflow:hidden;background:#eaf5ff}.project-visual img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s}.project-card:hover .project-visual img{transform:scale(1.04)}.project-visual span{position:absolute;left:14px;bottom:13px;padding:8px 14px;background:#0754b8;color:#fff;border-radius:30px;font-size:12px;font-weight:800;letter-spacing:.5px}.project-copy{padding:18px 20px 20px}.project-copy small{color:#0878c9}.project-copy h3{color:#092f70;font-size:17px;margin:8px 0}.project-copy p{font-size:13px;min-height:48px}.project-copy a{color:#0754b8;font-size:13px;font-weight:800}.project-note{margin-top:18px;padding:12px 15px;border-radius:10px;background:#f3f8fe;color:#61738a;font-size:11px}
#san-pham{background:#f2f8ff}#san-pham h2{color:#082e70}.catalog-intro{max-width:850px}.products{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.product{padding:0 0 17px;overflow:hidden;border:1px solid #dbe7f5;border-radius:15px;box-shadow:0 6px 20px #0b39740d;transition:transform .2s,box-shadow .2s}.product:hover{transform:translateY(-3px);box-shadow:0 12px 28px #0b39741b}.product-image{height:160px;background:linear-gradient(135deg,#eaf5ff,#f7fbff);display:grid;place-items:center;padding:12px}.product-image img{width:100%;height:100%;object-fit:contain}.product>small,.product h3,.product p,.product-specs,.product .price,.product button{margin-left:16px;margin-right:16px}.product>small{display:block;margin-top:13px;color:#0876c8}.product h3{font-size:15px;min-height:42px;color:#092f70}.product p{font-size:12px;min-height:55px}.product-specs{font-size:11px;color:#60758e;background:#f4f8fd;border-radius:7px;padding:7px 9px;min-height:34px}.product .price{margin-top:13px;margin-bottom:12px;color:#0754b8;font-size:17px}.product .price small{display:block;font-size:10px;color:#73849a;font-weight:500;letter-spacing:0}.product button{width:calc(100% - 32px)}.price-note{font-size:11px;color:#697d96;margin-top:18px}
.calculator h2,.quote h2{color:#082e70}.quote{background:#f4f9ff}.quote form{border-color:#dce8f5;box-shadow:0 8px 25px #0b397410}.contact-float{right:20px;bottom:24px;gap:10px}.contact-float a,.back-top{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:white;font-weight:800;box-shadow:0 6px 18px #082e7030}.contact-float-phone{background:#16a65c}.contact-float-zalo{background:#0876ed;font-size:12px}.contact-float-chat{background:#1665d8}.back-top{background:#082e70;border:0;font-size:24px;cursor:pointer}
footer{background:#082e70;color:#eaf4ff;gap:25px;flex-wrap:wrap}footer a{color:#fff}footer p{color:#d6e7fa}.footer-logo{width:165px;max-height:80px;object-fit:contain;background:#fff;border-radius:8px;padding:4px}
@media(max-width:950px){header{height:auto;min-height:78px;align-items:center;gap:12px}.brand{min-width:150px}.brand img{width:165px}nav{flex-wrap:wrap;justify-content:flex-end}.hero{grid-template-columns:1fr 1fr;padding:40px 5%}.art{height:290px}.products{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:650px){.topbar{gap:8px 16px;font-size:10px}.topbar-tag{display:none}header{position:sticky;top:0;display:block;padding:8px 4%}.brand{justify-content:center}.brand img{width:175px;max-width:55vw;max-height:58px}nav{justify-content:center;gap:8px 14px;padding:7px 0 3px;font-size:11px}.hero{grid-template-columns:1fr;gap:22px;padding:35px 6%}.hero h1{font-size:clamp(36px,10vw,48px)}.hero p{font-size:13px}.art{height:230px}.service-strip{margin:0 4% 12px;grid-template-columns:repeat(2,1fr);padding:10px}.service-item{font-size:11px;justify-content:flex-start;border-right:0;border-bottom:1px solid #dce8f7}.service-icon{font-size:24px}.project-grid{grid-template-columns:1fr}.project-visual{height:210px}.products{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.product-image{height:120px}.product h3{font-size:13px}.product p{font-size:11px;min-height:70px}.product-specs{font-size:10px}.quote{grid-template-columns:1fr}.contact-float{right:10px;bottom:12px}.contact-float a,.back-top{width:43px;height:43px}section{padding:42px 5%}footer{display:grid;grid-template-columns:1fr;gap:12px}}


/* KT SOLAR 2.3 – hiển thị ảnh dự án đúng lớp và trang giải pháp chi tiết */
.project-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;z-index:0;transition:transform .45s ease}
.project-visual::before{z-index:1;opacity:.12}
.project-visual::after{z-index:2;opacity:.12}
.project-visual span{z-index:3}
.project-card:hover .project-visual img{transform:scale(1.045)}
.project-copy a{display:inline-flex;align-items:center;gap:5px}
.project-copy a:hover{text-decoration:underline}
.solution-page{background:#f7fbff;color:#203653}
.solution-hero{padding:44px clamp(22px,6vw,92px);background:linear-gradient(120deg,#f2f8ff,#e8f5fb)}
.solution-breadcrumb{font-size:12px;color:#647994;margin-bottom:20px}
.solution-breadcrumb a{color:#087fa9;text-decoration:none;font-weight:700}
.solution-hero-grid{max-width:1240px;margin:auto;display:grid;grid-template-columns:1.02fr .98fr;gap:34px;align-items:center}
.solution-hero h1{font-size:clamp(34px,4.5vw,54px);line-height:1.1;color:#123477;margin:12px 0}
.solution-hero h1 em{color:#079fbd;font-style:normal}
.solution-hero p{font-size:15px;line-height:1.8;color:#526985;max-width:650px}
.solution-hero img{width:100%;height:330px;object-fit:cover;border-radius:22px;box-shadow:0 18px 42px rgba(20,54,105,.14)}
.solution-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.solution-actions .btn{background:#079fbd}
.solution-actions .btn.alt{background:#fff;color:#123477;border:1px solid #c9d9e9}
.solution-benefits{max-width:1240px;margin:-12px auto 0;padding:0 clamp(22px,6vw,92px);display:grid;grid-template-columns:repeat(3,1fr);gap:14px;position:relative}
.solution-benefit{background:#fff;border:1px solid #e1ebf5;border-radius:14px;padding:18px;box-shadow:0 10px 26px rgba(20,54,105,.06)}
.solution-benefit strong{display:block;color:#123477;margin-bottom:5px}
.solution-benefit span{font-size:12px;line-height:1.6;color:#62758d}
.solution-content{max-width:1240px;margin:auto;padding:58px clamp(22px,6vw,92px)}
.solution-content h2{color:#123477;font-size:clamp(25px,3vw,34px);margin:0 0 12px}
.solution-content .lead{max-width:800px;color:#62758d;line-height:1.8}
.solution-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:24px}
.solution-panel{background:#fff;border:1px solid #e1ebf5;border-radius:16px;padding:22px}
.solution-panel h3{color:#123477;margin:0 0 10px}
.solution-panel p,.solution-panel li{color:#5d718b;font-size:13px;line-height:1.75}
.solution-panel ul{padding-left:19px;margin:8px 0 0}
.solution-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-top:22px}
.solution-step{background:#fff;border:1px solid #e1ebf5;border-radius:14px;padding:17px}
.solution-step b{display:block;color:#079fbd;font-size:12px;margin-bottom:8px}
.solution-step strong{color:#123477;font-size:14px}
.solution-step p{font-size:12px;line-height:1.6;color:#62758d}
.solution-callout{background:linear-gradient(120deg,#103b83,#087fa9);color:#fff;border-radius:20px;padding:28px;display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:30px}
.solution-callout h2{color:#fff;margin:0 0 8px}
.solution-callout p{color:#e4f2ff;margin:0;font-size:13px;line-height:1.7}
.solution-callout .btn{background:#fff;color:#123477;white-space:nowrap}
.solution-disclaimer{font-size:11px;color:#7789a0;line-height:1.7;margin-top:22px}
.solution-footer{margin-top:20px}
@media(max-width:800px){
 .solution-hero-grid{grid-template-columns:1fr}
 .solution-hero img{height:240px}
 .solution-benefits{grid-template-columns:1fr;margin:0}
 .solution-columns{grid-template-columns:1fr}
 .solution-steps{grid-template-columns:repeat(2,1fr)}
 .solution-callout{display:block}
 .solution-callout .btn{margin-top:16px}
}
@media(max-width:520px){
 .solution-steps{grid-template-columns:1fr}
 .solution-hero{padding-top:28px}
 .solution-hero h1{font-size:34px}
 .solution-hero img{height:210px}
}

/* KT SOLAR 2.4 – cửa hàng và giỏ hàng */
.catalog-toolbar{display:grid;grid-template-columns:minmax(220px,1.7fr) minmax(150px,.8fr) minmax(150px,.8fr);gap:12px;align-items:end;margin:22px 0 10px}
.catalog-toolbar label{display:block;font-size:11px;font-weight:800;color:#173d76}
.catalog-toolbar label span{display:block;margin:0 0 4px}
.catalog-toolbar input,.catalog-toolbar select{margin:0;background:#fff;border-color:#d7e5f5}
.catalog-summary{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:8px 0 16px;color:#6a7d96;font-size:11px}
.catalog-summary a{color:#0754b8;font-weight:700}
.product-content{padding:0 16px}
.product-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:13px}
.product-meta>small{margin:0;color:#0876c8;letter-spacing:1px}
.product-status{font-size:9px;color:#087052;background:#eaf7f1;border-radius:20px;padding:4px 7px;white-space:nowrap}
.product-content h3{margin:9px 0 7px;min-height:42px}
.product-content p{margin:0 0 10px;min-height:55px}
.product-content .product-specs{margin:0;min-height:38px}
.product-brand{font-size:10px;color:#75859a;margin-top:8px}
.product-content .price{margin:12px 0;color:#0754b8;font-size:17px}
.product-content .price small{display:block;font-size:9px;color:#73849a;font-weight:500;letter-spacing:0}
.product-content button{width:100%;margin:0}
.product-content button:disabled{opacity:.5;cursor:not-allowed}
.cart-list{display:grid;gap:10px}
.cart-row{display:flex;justify-content:space-between;align-items:center;gap:12px;border-bottom:1px solid #e4edf8;padding:10px 0}
.cart-row strong{display:block;color:#12366f;font-size:13px}
.cart-row small{display:block;color:#7a8ba1;font-size:10px;letter-spacing:0}
.cart-controls{display:flex;align-items:center;gap:7px;white-space:nowrap}
.cart-controls button{border:1px solid #d6e3f3;background:#f5f9ff;border-radius:6px;padding:4px 9px;color:#12417e;cursor:pointer}
.cart-controls .cart-remove{color:#b42318;border:0;background:transparent}
.cart-empty{color:#6d7e94;font-size:13px;padding:14px 2px}
.cart-notice{font-size:12px;color:#087052;min-height:18px}
#order{align-self:start}
#order #total{display:block;font-size:21px;color:#0754b8;margin:12px 0}
#ordermsg,#leadmsg{font-size:12px;font-weight:700;color:#087052}
@media(max-width:750px){.catalog-toolbar{grid-template-columns:1fr 1fr}.catalog-toolbar .catalog-search{grid-column:1/-1}.catalog-summary{align-items:flex-start;flex-direction:column}.product-content{padding:0 11px}.product-meta{align-items:flex-start;flex-direction:column}.cart-row{align-items:flex-start;flex-direction:column}.cart-controls{align-self:flex-end}}