/* =========================================================
   THU NGÂN CO., LTD — Design System
   Palette: đỏ thương hiệu + trắng + than chì, điểm nhấn vàng an toàn
   Display: Oswald (condensed, công nghiệp) | Body: Be Vietnam Pro
   Signature: "Thước đo độ sâu" (depth-ruler) — mô-típ mặt cắt hố đào
   ========================================================= */

:root{
  --red-900:#7a0d13;
  --red-700:#a3121a;
  --red:#c8161f;        /* đỏ thương hiệu chính */
  --red-500:#e2202a;
  --ink:#171412;         /* than chì gần đen, ấm hơn #000 */
  --ink-700:#3a3532;
  --ink-500:#635d59;
  --ink-300:#96908c;
  --paper:#ffffff;
  --paper-100:#faf8f7;
  --paper-200:#f1ede9;
  --line:#e4dfda;
  --safety:#f2a900;      /* vàng an toàn — dùng rất tiết chế */

  --display: "Roboto", "Be Vietnam Pro", sans-serif;
  --body: "Be Vietnam Pro", "Inter", sans-serif;

  --container: 1240px;
  --radius: 2px;
  --shadow-sm: 0 1px 2px rgba(23,20,18,.08);
  --shadow-md: 0 8px 24px rgba(23,20,18,.12);
  --shadow-lg: 0 24px 60px rgba(23,20,18,.22);

  --ease: cubic-bezier(.22,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important;}
}

body{
  margin:0;
  font-family:var(--body);
  color:var(--ink);
  background:var(--paper);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
ul{margin:0; padding:0; list-style:none;}
h1,h2,h3,h4{
  font-family:var(--display);
  letter-spacing:0;
  line-height:1.28;
  margin:0 0 .5em;
  color:var(--ink);
  font-weight:600;
}
h1{line-height:1.18;}
p{margin:0 0 1em;}
button{font-family:inherit;}

:focus-visible{outline:3px solid var(--safety); outline-offset:2px;}

.container{
  max-width:var(--container);
  margin-inline:auto;
  padding-inline:24px;
}
@media (max-width:640px){
  .container{padding-inline:18px;}
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--display);
  font-size:1.4rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--red);
  font-weight:600;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:28px; height:2px;
  background:var(--red);
}

/* =================== HEADER =================== */
.site-header{
  position:sticky; top:0; z-index:1000;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{display:flex; align-items:center; gap:12px;}
.brand img{height:38px; width:auto;}
.brand-text{display:flex; flex-direction:column; line-height:1.1;}
.brand-text b{
  font-family:var(--display); font-size:1.05rem; letter-spacing:.04em;
  color:var(--ink);
}
.brand-text span{font-size:.66rem; letter-spacing:.08em; color:var(--red); text-transform:uppercase; font-weight:700;}

.main-nav{display:flex; align-items:center; gap:2px;}
.main-nav a{
  padding:10px 12px;
  font-family:var(--display);
  font-size:.86rem;
  letter-spacing:.05em;
  text-transform:uppercase;
  font-weight:500;
  color:var(--ink-700);
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease), border-color .2s var(--ease);
}
.main-nav a:hover{color:var(--red);}
.main-nav a.active{color:var(--red); border-color:var(--red);}

.header-cta{
  display:flex; align-items:center; gap:16px;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--display);
  font-size:.82rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  font-weight:600;
  padding:13px 18px;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s var(--ease), background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:var(--red); color:#fff;}
.btn-primary:hover{background:var(--red-700);}
.btn-outline{border-color:var(--red); color:var(--red);}
.btn-outline:hover{border-color:var(--red); color:var(--red);}
.btn-ghost-light{border-color:rgba(255,255,255,.55); color:#fff;}
.btn-ghost-light:hover{border-color:#fff; background:rgba(255,255,255,.12);}
.btn-sm{padding:9px 18px; font-size:.74rem;}

.nav-toggle{
  display:none;
  width:44px; height:44px;
  border:1px solid var(--line);
  background:#fff;
  align-items:center; justify-content:center;
  border-radius:var(--radius);
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:20px; height:2px; background:var(--ink); position:relative;
  transition:transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle span::before{position:absolute; top:-6px;}
.nav-toggle span::after{position:absolute; top:6px;}
.nav-toggle.open span{background:transparent;}
.nav-toggle.open span::before{top:0; transform:rotate(45deg);}
.nav-toggle.open span::after{top:0; transform:rotate(-45deg);}

@media (max-width:900px){
  .main-nav{
    position:fixed; top:76px; left:0; right:0; bottom:auto;
    z-index:1001;
    max-height:calc(100dvh - 76px);
    background:var(--paper);
    flex-direction:column; align-items:stretch;
    padding:8px 18px 28px;
    gap:0;
    transform:translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition:opacity .2s var(--ease), transform .2s var(--ease);
    overflow-y:auto;
    border-top:1px solid var(--line);
  }
  .main-nav.open{opacity:1; transform:translateY(0); pointer-events:auto;}
  .main-nav a{
    padding:16px 4px;
    border-bottom:1px solid var(--line);
    font-size:1rem;
  }
  .header-cta .btn-outline{display:none;}
  .nav-toggle{display:flex;}
}

/* =================== DEPTH RULER (signature element) =================== */
/* Mô-típ mặt cắt hố đào tầng hầm — thước đo độ sâu thi công */
.depth-ruler{
  position:relative;
  display:flex;
  width:100%;
  border-top:1px solid rgba(255,255,255,.25);
}
.depth-ruler .tick{
  flex:1;
  position:relative;
  padding-top:14px;
  border-left:1px solid rgba(255,255,255,.25);
}
.depth-ruler .tick:first-child{border-left:none;}
.depth-ruler .tick::before{
  content:"";
  position:absolute; left:0; top:0;
  width:1px; height:8px; background:rgba(255,255,255,.5);
}
.depth-ruler .tick label{
  display:block;
  font-family:var(--display);
  font-size:.68rem;
  letter-spacing:.08em;
  color:rgba(255,255,255,.65);
  padding-left:10px;
}
.depth-ruler.on-light{border-top-color:var(--line);}
.depth-ruler.on-light .tick{border-left-color:var(--line);}
.depth-ruler.on-light .tick::before{background:var(--ink-300);}
.depth-ruler.on-light .tick label{color:var(--ink-500);}

/* =================== HERO =================== */
.hero{
  position:relative;
  min-height:92vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  color:#fff;
  overflow:hidden;
  background:var(--ink);
}
.hero-media{
  position:absolute; inset:0;
  background-size:cover; background-position:center;
}
.hero-media::after{
  content:"";
  position:absolute; inset:0;
  background:
    linear-gradient(180deg, rgba(17,12,11,.55) 0%, rgba(17,12,11,.35) 38%, rgba(122,13,19,.55) 78%, rgba(122,13,19,.86) 100%);
}
.hero-content{
  position:relative; z-index:2;
  padding:140px 0 0;
}
.hero-eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--display); font-size:.8rem; letter-spacing:.09em;
  text-transform:uppercase; font-weight:600; color:var(--safety);
  margin-bottom:22px;
}
.hero-eyebrow::before{content:""; width:34px; height:2px; background:var(--safety);}
.hero h1{
  font-size:clamp(2.4rem, 6vw, 5rem);
  max-width:16ch;
  color:#fff;
  margin-bottom:.32em;
}
.hero h1 em{
  font-style:normal; color:var(--safety);
}
.hero p.lede{
  font-size:1.15rem;
  max-width:56ch;
  color:rgba(255,255,255,.86);
  margin-bottom:2em;
}
.hero-actions{display:flex; gap:16px; flex-wrap:wrap; margin-bottom:64px;}

/* =================== STATS STRIP =================== */
.stats-strip{
  background:var(--ink);
  color:#fff;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.stat{
  padding:34px 20px;
  border-left:1px solid rgba(255,255,255,.14);
  text-align:center;
}
.stat:first-child{border-left:none;}
.stat .num{
  font-family:var(--display);
  font-size:clamp(1.7rem,3vw,2.6rem);
  color:var(--safety);
  font-weight:600;
}
.stat .lbl{
  font-size:.76rem;
  letter-spacing:.05em;
  color:rgba(255,255,255,.72);
  margin-top:4px;
}
@media (max-width:900px){
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .stat{border-left:none; border-top:1px solid rgba(255,255,255,.14);}
  .stat:nth-child(1),.stat:nth-child(2){border-top:none;}
  .stat:nth-child(odd){border-left:none;}
}

/* =================== SECTIONS =================== */
section{padding:104px 0;}
@media (max-width:900px){ section{padding:64px 0;} }
.section-head{
  display:flex; align-items:flex-end; justify-content:space-between; gap:32px;
  margin-bottom:52px;
  flex-wrap:wrap;
}
.section-head h2{font-size:clamp(1.8rem,3.4vw,2.6rem); max-width:20ch; margin:0;}
.section-head .desc{max-width:46ch; color:var(--ink-500);}
.bg-ivory{background:var(--paper-100);}
.bg-ink{background:var(--ink); color:#fff;}
.bg-ink h2, .bg-ink .eyebrow{color:#fff;}
.bg-ink .section-head .desc{color:rgba(255,255,255,.7);}

/* =================== ABOUT SNAPSHOT =================== */
.about-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.about-grid .figure{position:relative;}
.about-grid .figure img{border-radius:var(--radius); box-shadow:var(--shadow-lg);}
.about-grid .figure .tag{
  position:absolute; left:-18px; bottom:-18px;
  background:var(--red); color:#fff;
  padding:16px 22px;
  font-family:var(--display);
  box-shadow:var(--shadow-md);
}
.about-grid .figure .tag .n{font-size:1.7rem; display:block;}
.about-grid .figure .tag .l{font-size:.66rem; letter-spacing:.1em; text-transform:uppercase; opacity:.85;}
.about-copy p{color:var(--ink-700);}
.check-list{margin-top:24px; display:grid; gap:14px;}
.check-list li{
  display:flex; gap:12px; align-items:flex-start;
  font-size:.96rem; color:var(--ink-700);
}
.check-list li::before{
  content:"";
  flex:none; width:9px; height:9px; margin-top:6px;
  background:var(--red);
}
@media (max-width:900px){
  .about-grid{grid-template-columns:1fr; gap:40px;}
}

/* =================== CAPABILITY CARDS =================== */
.cap-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.cap-card{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  padding:36px 30px;
  transition:border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.cap-card:hover{border-color:var(--red); transform:translateY(-4px); box-shadow:var(--shadow-md);}
.cap-card .idx{
  font-family:var(--display); font-size:.78rem; color:var(--red);
  letter-spacing:.1em; margin-bottom:18px; display:block;
}
.cap-card h3{font-size:1.28rem; margin-bottom:.4em;}
.cap-card p{color:var(--ink-500); font-size:.95rem; margin-bottom:1.2em;}
.cap-card .more{
  font-family:var(--display); font-size:.78rem; letter-spacing:.06em; text-transform:uppercase;
  color:var(--ink); font-weight:600;
  display:inline-flex; align-items:center; gap:8px;
}
.cap-card .more::after{content:"→"; transition:transform .2s var(--ease);}
.cap-card:hover .more{color:var(--red);}
.cap-card:hover .more::after{transform:translateX(4px);}
@media (max-width:900px){ .cap-grid{grid-template-columns:1fr;} }

/* Hazard-corner accent — mượn từ vạch cảnh báo công trường, dùng tiết chế trên 1 thẻ nổi bật */
.hazard-corner{position:relative; overflow:hidden;}
.hazard-corner::before{
  content:"";
  position:absolute; top:0; right:0;
  width:64px; height:64px;
  background:repeating-linear-gradient(45deg, var(--safety) 0 10px, var(--ink) 10px 20px);
  clip-path:polygon(100% 0, 0 0, 100% 100%);
}

/* =================== PROJECT CARDS =================== */
.proj-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.proj-card{
  background:#fff;
  border:1px solid var(--line);
}
.proj-media{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  background:var(--ink);
}
.proj-media img{width:100%; height:100%; object-fit:cover; transition:transform .5s var(--ease);}
.proj-card:hover .proj-media img{transform:scale(1.06);}
.proj-media .badge{
  position:absolute; left:0; bottom:0;
  background:var(--red); color:#fff;
  font-family:var(--display); font-size:.68rem; letter-spacing:.08em; text-transform:uppercase;
  padding:7px 14px; font-weight:600;
}
.proj-body{padding:22px 24px 26px;}
.proj-body h3{font-size:1.05rem; margin-bottom:.5em; text-transform:none; letter-spacing:0;}
.proj-meta{display:grid; gap:6px; font-size:.86rem; color:var(--ink-500); margin-top:12px;}
.proj-meta b{color:var(--ink-700); font-weight:600;}
@media (max-width:980px){ .proj-grid{grid-template-columns:repeat(2,1fr);} }
@media (max-width:640px){ .proj-grid{grid-template-columns:1fr;} }

/* =================== PARTNERS STRIP =================== */
.partners-row > .partner-card{
  scroll-snap-align:start;
  flex:0 0 auto;
  width:190px;
  margin:0;
  display:flex; flex-direction:column; align-items:center; justify-content:flex-start; gap:18px;
  padding:16px 20px;
  background:transparent;
  text-align:center;
  transition:transform .2s var(--ease);
}
.partners-row > .partner-card:hover{
  transform:translateY(-4px);
}
.partner-logo{
  height:72px; width:100%;
  display:flex; align-items:center; justify-content:center;
}
.partner-logo img{
  max-height:72px; max-width:140px;
  width:auto; height:auto;
  object-fit:contain;
}
.partner-name{
  font-family:var(--display);
  font-weight:600;
  font-size:.92rem;
  letter-spacing:.02em;
  color:var(--ink-700);
}
@media (max-width:640px){
  .partners-row > .partner-card{width:44vw;}
}
.partners-swipe{position:relative;}
.partners-swipe .swipe-row{margin:0; padding:4px 4px 14px;}
.swipe-btn.swipe-side{
  position:absolute;
  top:calc(50% - 7px);
  transform:translateY(-50%);
  z-index:4;
  box-shadow:0 6px 18px rgba(17,12,11,.12);
}
.swipe-btn.swipe-side.swipe-prev{left:-8px;}
.swipe-btn.swipe-side.swipe-next{right:-8px;}
.swipe-btn.swipe-side:disabled{opacity:0; pointer-events:none;}
@media (max-width:640px){
  .swipe-btn.swipe-side.swipe-prev{left:2px;}
  .swipe-btn.swipe-side.swipe-next{right:2px;}
}

/* =================== CTA BAND =================== */
.cta-band{
  background:var(--red);
  color:#fff;
  padding:80px 0;
  position:relative;
  overflow:hidden;
}
.cta-inner{
  display:flex; align-items:center; justify-content:space-between; gap:32px; flex-wrap:wrap;
  position:relative; z-index:2;
}
.cta-inner h2{color:#fff; margin:0; max-width:60ch;}
.cta-band .btn-outline{border-color:#fff; color:#fff;}
.cta-band .btn-outline:hover{background:#fff; color:var(--red);}

/* =================== FOOTER =================== */
.site-footer{background:var(--ink); color:rgba(255,255,255,.75); padding-top:72px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:56px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.footer-brand .brand-text b{color:#fff;}
.footer-brand p{color:rgba(255,255,255,.6); font-size:.92rem; max-width:34ch; margin-top:16px;}
.footer-col h4{
  font-family:var(--display); font-size:.8rem; letter-spacing:.1em; color:#fff;
  margin-bottom:18px;
}
.footer-col ul{display:grid; gap:11px;}
.footer-col a{color:rgba(255,255,255,.68); font-size:.92rem; transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--safety);}
.footer-bottom{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;
  padding:24px 0; font-size:.82rem; color:rgba(255,255,255,.5);
}
@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr; gap:32px 24px;}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;}
}

/* =================== PAGE HERO (subpages) =================== */
.page-hero{
  position:relative;
  color:#fff;
  background:var(--ink);
  padding:150px 0 76px;
  overflow:hidden;
}
.page-hero .hero-media::after{
  background:linear-gradient(180deg, rgba(17,12,11,.68), rgba(122,13,19,.72));
}
.page-hero h1{font-size:clamp(2rem,4.6vw,3.4rem); color:#fff; max-width:22ch;}
.page-hero p{max-width:56ch; color:rgba(255,255,255,.82); font-size:1.05rem;}
.breadcrumb{
  font-family:var(--display); font-size:.78rem; letter-spacing:.08em; text-transform:uppercase;
  color:rgba(255,255,255,.65); margin-bottom:20px;
}
.breadcrumb a{color:#fff;}
.breadcrumb a:hover{color:var(--safety);}

/* =================== TABLE / DATA =================== */
.data-table{width:100%; border-collapse:collapse; font-size:.94rem;}
.data-table th, .data-table td{
  padding:14px 16px; border-bottom:1px solid var(--line); text-align:left;
}
.data-table thead th{
  font-family:var(--display); font-size:.72rem; letter-spacing:.08em; text-transform:uppercase;
  color:#fff; background:var(--ink); font-weight:600;
}
.data-table tbody tr:nth-child(even){background:var(--paper-100);}
.data-table tbody tr:hover{background:#fdece9;}
.table-scroll{overflow-x:auto; border:1px solid var(--line);}
.table-scroll .data-table{min-width:640px;}

/* =================== TIMELINE =================== */
.timeline{position:relative; margin-left:8px; padding-left:32px; border-left:2px solid var(--line);}
.timeline-item{position:relative; padding-bottom:44px;}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:""; position:absolute; left:-38px; top:2px;
  width:14px; height:14px; border-radius:50%;
  background:var(--red); border:3px solid #fff; box-shadow:0 0 0 2px var(--red);
}
.timeline-item .yr{font-family:var(--display); color:var(--red); font-size:1.1rem; font-weight:600;}
.timeline-item p{color:var(--ink-500); margin-top:6px;}

/* =================== ORG CHART =================== */
.org-chart{display:grid; gap:14px; justify-items:center;}
.org-node{
  background:#fff; border:1px solid var(--line); padding:14px 20px;
  font-family:var(--display); font-size:.82rem; letter-spacing:.03em; text-transform:uppercase;
  text-align:center; box-shadow:var(--shadow-sm);
}
.org-node.top{background:var(--red); color:#fff; border-color:var(--red); font-size:.92rem;}
.org-row{display:grid; gap:14px; width:100%;}
.org-row.cols-3{grid-template-columns:repeat(3,1fr);}
.org-row.cols-6{grid-template-columns:repeat(6,1fr);}
.org-connector{width:2px; height:22px; background:var(--line);}
@media (max-width:900px){
  .org-row.cols-3{grid-template-columns:1fr;}
  .org-row.cols-6{grid-template-columns:repeat(2,1fr);}
}

/* =================== FILTER CHIPS (dự án) =================== */
.filter-bar{display:flex; flex-wrap:wrap; gap:10px; margin-bottom:44px;}
.filter-chip{
  padding:10px 20px;
  border:1px solid var(--line);
  font-family:var(--display); font-size:.78rem; letter-spacing:.05em; text-transform:uppercase;
  font-weight:500; color:var(--ink-700);
  cursor:pointer; background:#fff;
  transition:all .2s var(--ease);
}
.filter-chip:hover{border-color:var(--red); color:var(--red);}
.filter-chip.active{background:var(--ink); border-color:var(--ink); color:#fff;}

/* =================== SHOWCASE GRID (equipment, American Truxx-style) =================== */
.showcase-section{background:var(--ink); color:#fff;}
.showcase-section .eyebrow{color:var(--safety);}
.showcase-section .eyebrow::before{background:var(--safety);}
.showcase-section h2{color:#fff;}
.showcase-section .section-head .desc{color:rgba(255,255,255,.68);}
.showcase-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:2px;
  background:#000;
}
.showcase-card{
  position:relative;
  display:block;
  aspect-ratio:1/1;
  overflow:hidden;
  background:#000;
}
.showcase-card img{
  width:100%; height:100%; object-fit:cover;
  filter:grayscale(15%) contrast(1.05) brightness(.92);
  transition:transform .6s var(--ease), filter .4s var(--ease);
}
.showcase-card:hover img{transform:scale(1.1); filter:grayscale(0%) brightness(1);}
.showcase-card::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(0deg, rgba(0,0,0,.88) 0%, rgba(0,0,0,.15) 55%, transparent 75%);
}
.showcase-card .cap{
  position:absolute; left:0; right:0; bottom:0;
  padding:20px 18px;
  z-index:2;
}
.showcase-card .cap span{
  display:block;
  font-family:var(--display); font-size:.68rem; letter-spacing:.07em; text-transform:uppercase;
  color:var(--safety); font-weight:600; margin-bottom:4px;
}
.showcase-card .cap h3{
  color:#fff; font-size:1rem; letter-spacing:0; margin:0; text-transform:none; line-height:1.3;
}
@media (max-width:900px){ .showcase-grid{grid-template-columns:repeat(2,1fr);} }

/* =================== ABOUT + COUNTERS (Coteccons-style) =================== */
.about-counters{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
  margin-top:48px;
  padding-top:40px;
  border-top:1px solid var(--line);
}
.about-counters .counter{text-align:left;}
.about-counters .counter .num{
  font-family:var(--display);
  font-size:clamp(2rem,3.2vw,2.9rem);
  color:var(--red);
  font-weight:600;
  line-height:1;
}
.about-counters .counter .num::after{content:attr(data-suffix);}
.about-counters .counter .lbl{
  margin-top:8px;
  font-size:.86rem;
  color:var(--ink-500);
}
@media (max-width:900px){
  .about-counters{grid-template-columns:repeat(2,1fr);}
}

/* =================== CATEGORY CARDS (lĩnh vực thi công) =================== */
.category-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.category-card{
  position:relative;
  display:block;
  aspect-ratio:3/4;
  overflow:hidden;
  background:var(--ink);
  border-radius:var(--radius);
}
.category-card img{
  width:100%; height:100%; object-fit:cover;
  transition:transform .6s var(--ease);
}
.category-card:hover img{transform:scale(1.08);}
.category-card::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(0deg, rgba(17,12,11,.92) 0%, rgba(17,12,11,.15) 60%, rgba(17,12,11,.05) 100%);
}
.category-card .cap{
  position:absolute; left:0; right:0; bottom:0;
  padding:26px 22px;
  z-index:2;
  color:#fff;
}
.category-card .cap .k{
  display:block;
  font-family:var(--display); font-size:.7rem; letter-spacing:.07em; text-transform:uppercase;
  color:var(--safety); font-weight:600; margin-bottom:10px;
}
.category-card .cap h3{
  color:#fff; font-size:1.14rem; text-transform:none; letter-spacing:0; margin-bottom:.4em;
}
.category-card .cap p{
  color:rgba(255,255,255,.78); font-size:.86rem; margin:0;
  max-height:0; opacity:0; overflow:hidden;
  transition:max-height .35s var(--ease), opacity .3s var(--ease);
}
.category-card:hover .cap p{max-height:80px; opacity:1;}
@media (max-width:980px){ .category-grid{grid-template-columns:repeat(2,1fr);} }
@media (max-width:560px){ .category-grid{grid-template-columns:1fr;} .category-card{aspect-ratio:16/10;} }

/* =================== ICONIC PROJECTS (large editorial feature) =================== */
.iconic-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr;
  gap:28px;
}
.iconic-card{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--ink);
  border-radius:var(--radius);
  min-height:460px;
}
.iconic-grid .iconic-card:nth-child(2){min-height:auto;}
.iconic-card img{
  position:absolute; inset:0;
  width:100%; height:100%; object-fit:cover;
  transition:transform .7s var(--ease);
}
.iconic-card:hover img{transform:scale(1.06);}
.iconic-card::after{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(0deg, rgba(17,12,11,.9) 0%, rgba(17,12,11,.25) 55%, transparent 85%);
}
.iconic-card .cap{
  position:absolute; left:0; right:0; bottom:0;
  padding:40px 36px;
  z-index:2; color:#fff;
}
.iconic-card .cap .k{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--display); font-size:.72rem; letter-spacing:.07em; text-transform:uppercase;
  color:var(--safety); font-weight:600; margin-bottom:14px;
}
.iconic-card .cap h3{color:#fff; font-size:clamp(1.3rem,2.2vw,1.9rem); max-width:20ch; margin-bottom:.3em;}
.iconic-card .cap p{color:rgba(255,255,255,.78); max-width:42ch; margin-bottom:0; font-size:.92rem;}
@media (max-width:900px){
  .iconic-grid{grid-template-columns:1fr;}
  .iconic-card{min-height:340px;}
  .iconic-grid .iconic-card:nth-child(2){min-height:340px;}
}

/* =================== PEOPLE SECTION =================== */
.people-section{position:relative; color:#fff; background:var(--ink); overflow:hidden;}
.people-copy{max-width:60ch; margin-bottom:48px;}
.people-copy h2{color:#fff;}
.people-copy p{color:rgba(255,255,255,.72); font-size:1.02rem;}
.people-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.people-grid img{
  width:100%; aspect-ratio:3/4; object-fit:cover; border-radius:var(--radius);
  filter:grayscale(35%);
  transition:filter .3s var(--ease), transform .4s var(--ease);
}
.people-grid a:hover img{filter:grayscale(0%); transform:translateY(-6px);}
@media (max-width:900px){ .people-grid{grid-template-columns:repeat(2,1fr);} }

/* =================== SWIPE CAROUSEL (dự án vuốt ngang) =================== */
.swipe-wrap{position:relative;}
.swipe-controls{display:flex; justify-content:flex-end; gap:10px; margin-bottom:22px;}
.swipe-btn{
  width:44px; height:44px; border-radius:50%;
  border:1px solid var(--line); background:#fff;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; transition:border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
  color:var(--ink);
}
.swipe-btn:hover{border-color:var(--red); color:var(--red);}
.swipe-btn:disabled{opacity:.35; cursor:default;}
.swipe-btn:disabled:hover{border-color:var(--line); color:var(--ink);}
.swipe-btn svg{width:18px; height:18px; stroke:currentColor; fill:none; stroke-width:2;}
.swipe-row{
  display:flex;
  gap:22px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
  padding-bottom:14px;
  margin:0 -4px;
  padding-left:4px; padding-right:4px;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
}
.swipe-row::-webkit-scrollbar{height:6px;}
.swipe-row::-webkit-scrollbar-track{background:transparent;}
.swipe-row::-webkit-scrollbar-thumb{background:var(--line); border-radius:4px;}
.swipe-row > .proj-card{
  scroll-snap-align:start;
  flex:0 0 auto;
  width:320px;
}
@media (max-width:640px){
  .swipe-row > .proj-card{width:80vw;}
  .swipe-controls{display:none;}
}

/* =================== EQUIPMENT TABLE ICONS ROW =================== */
.equip-gallery{
  display:grid; grid-template-columns:repeat(4,1fr); gap:20px;
}
.equip-gallery .g-item{aspect-ratio:3/4; overflow:hidden; position:relative;}
.equip-gallery .g-item img{width:100%; height:100%; object-fit:cover; transition:transform .5s var(--ease);}
.equip-gallery .g-item:hover img{transform:scale(1.06);}
@media (max-width:900px){
  .equip-gallery{grid-template-columns:repeat(2,1fr);}
}

/* =================== CONTACT =================== */
.contact-grid{display:grid; grid-template-columns:1.1fr .9fr; gap:60px;}
.contact-card{border:1px solid var(--line); padding:32px; margin-bottom:18px;}
.contact-card h4{font-size:.78rem; letter-spacing:.1em; color:var(--red); margin-bottom:12px;}
.contact-card .val{font-family:var(--display); font-size:1.3rem;}
.form-field{margin-bottom:20px;}
.form-field label{display:block; font-size:.82rem; font-weight:600; margin-bottom:8px; color:var(--ink-700);}
.form-field input, .form-field textarea, .form-field select{
  width:100%; padding:13px 16px; border:1px solid var(--line); border-radius:var(--radius);
  font-family:var(--body); font-size:.95rem; background:#fff; color:var(--ink);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus{border-color:var(--red);}
.map-embed{border:1px solid var(--line); height:340px; overflow:hidden;}
.map-embed iframe{width:100%; height:100%; border:0;}
@media (max-width:900px){ .contact-grid{grid-template-columns:1fr;} }

/* =================== UTIL =================== */
.mt-0{margin-top:0;}
.text-center{text-align:center;}
.reveal{opacity:0; transform:translateY(24px); transition:opacity .6s var(--ease), transform .6s var(--ease);}
.reveal.in{opacity:1; transform:none;}

/* Legal/reg info block */
.legal-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line);}
.legal-item{background:#fff; padding:22px 26px;}
.legal-item .k{font-size:.74rem; letter-spacing:.08em; text-transform:uppercase; color:var(--ink-500); margin-bottom:6px;}
.legal-item .v{font-family:var(--display); font-size:1.05rem;}
@media (max-width:700px){ .legal-grid{grid-template-columns:1fr;} }

/* =================== TYPOGRAPHY: không rớt chữ lẻ =================== */
/* Tiêu đề & nhãn ngắn: chia dòng đều nhau; đoạn văn: tránh dòng cuối chỉ có 1 chữ */
h1,h2,h3,h4,.eyebrow,.lbl,.badge,.cap span,.k,.idx,.more,.filter-chip,.stat .lbl,
.showcase-card .cap h3,.iconic-card .cap h3,.proj-body h3{ text-wrap:balance; }
p,li,.proj-meta span,.desc,.lede,.iconic-card .cap p,.timeline-item p,.legal-item .v,.contact-card .val{ text-wrap:pretty; }
/* Không bẻ giữa từ, không tách dấu gạch nối / đơn vị khỏi số */
h1,h2,h3,h4,p,li,span,a,button{ overflow-wrap:normal; word-break:normal; hyphens:manual; }
/* Nút, badge, menu, chip: luôn 1 dòng (nếu chật thì JS thu nhỏ chữ) */
.btn,.badge,.main-nav a,.filter-chip,.more,.brand-text span,.brand-text b,.partner-chip{ white-space:nowrap; }
/* Ô số liệu & nhãn nhỏ được phép xuống dòng nhưng không mồ côi */
.stat .lbl{ max-width:22ch; margin-inline:auto; }
/* Fit-text: JS ghi --fit (0.7–1) để thu nhỏ khi còn mồ côi/tràn */
[data-fit]{ font-size:calc(var(--base-fs, 1em) * var(--fit, 1)) !important; }

/* Hero: nội dung thẳng hàng với header (container không co lại trong flex) */
.hero > .container{ width:100%; }
.section-head h2{ max-width:24ch; }

/* =================== HERO SLIDER (kiểu Coteccons: box màu vát góc, gradient nhẹ) =================== */
.hero--slider{ padding:0; min-height:max(620px, calc(100svh - 76px)); justify-content:flex-end; background:var(--ink); }
.hero-slides{ position:absolute; inset:0; }
.hero-slide{ position:absolute; inset:0; background-size:cover; background-position:center; opacity:0; transition:opacity .9s var(--ease); }
.hero-slide.active{ opacity:1; }
.hero-shade{ position:absolute; inset:0; z-index:1; pointer-events:none;
  background:
    linear-gradient(90deg, rgba(17,12,11,.62) 0%, rgba(17,12,11,.18) 55%, rgba(17,12,11,0) 100%),
    linear-gradient(0deg, rgba(17,12,11,.55) 0%, rgba(17,12,11,0) 38%); }
.hero--slider > .container{ width:100%; }
.hero-stage{ position:relative; z-index:2; flex:1; display:flex; align-items:flex-end; justify-content:space-between; gap:40px; padding-top:72px; padding-bottom:104px; }
.hero-title{ margin:0; font-family:var(--display); font-weight:700; text-transform:uppercase; line-height:1.22; letter-spacing:.01em;
  font-size:clamp(2.5rem, 7.4vw, 6.4rem); color:#fff; }
.hero-title span{ display:block; }
.hero-title .outline{ color:transparent; -webkit-text-stroke:2px #fff; paint-order:stroke fill; }
.hero-title .solid{ color:var(--safety); }

.hero-side{ flex:0 0 auto; width:min(420px, 100%); align-self:center; }
.hero-box{ position:relative; display:grid; color:#fff; padding:34px 34px 30px; min-height:340px;
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(255,255,255,.16) 0%, rgba(255,255,255,0) 55%),
    linear-gradient(150deg, #e2202a 0%, #c8161f 46%, #93101a 100%);
  clip-path:polygon(32px 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%, 0 32px);
  box-shadow:0 24px 60px rgba(0,0,0,.35); }
.hero-copy{ grid-area:1 / 1; display:flex; flex-direction:column; opacity:0; visibility:hidden; transform:translateY(8px);
  transition:opacity .5s var(--ease), transform .5s var(--ease), visibility .5s; }
.hero-copy.active{ opacity:1; visibility:visible; transform:none; }
.hero-count{ font-family:var(--display); font-weight:600; font-size:1rem; letter-spacing:.04em; margin-bottom:14px; }
.hero-copy h3{ color:#fff; font-size:1.7rem; margin-bottom:.45em; }
.hero-copy p{ color:rgba(255,255,255,.92); font-size:1rem; line-height:1.6; margin-bottom:26px; }
.hero-more{ margin-top:auto; align-self:flex-start; white-space:nowrap; font-family:var(--display); font-weight:600; font-size:.92rem;
  letter-spacing:.06em; text-transform:uppercase; color:#fff; padding-bottom:8px; border-bottom:2px solid #fff; transition:gap .2s var(--ease), opacity .2s; display:inline-flex; gap:10px; }
.hero-more:hover{ gap:16px; }

.hero-nav{ display:flex; gap:10px; justify-content:flex-end; margin-top:16px; }
.hero-btn{ width:46px; height:46px; display:grid; place-items:center; cursor:pointer; border:0; background:rgba(255,255,255,.88); color:var(--red); transition:background .2s var(--ease), transform .2s var(--ease); }
.hero-btn:hover{ background:#fff; transform:translateY(-2px); }
.hero-btn svg{ width:22px; height:22px; stroke:currentColor; fill:none; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
@media (min-width:1360px){
  .hero-nav{ position:absolute; inset:0; margin:0; pointer-events:none; display:block; }
  .hero-btn{ position:absolute; top:50%; margin-top:-23px; pointer-events:auto; }
  .hero-prev{ left:calc(50% - 50vw + 24px); } .hero-next{ right:calc(50% - 50vw + 24px); }
}

.hero-bar{ position:relative; z-index:3; background:linear-gradient(90deg, #7a0d13 0%, #a3121a 60%, #c8161f 100%); color:#fff; }
.hero-bar-inner{ display:flex; align-items:stretch; gap:0; min-height:58px; }
.hero-bar-label{ display:flex; align-items:center; padding:0 46px 0 0; margin-right:-18px; font-family:var(--display); font-weight:600; font-size:1.15rem; white-space:nowrap;
  background:var(--ink); clip-path:polygon(0 0, 100% 0, calc(100% - 22px) 100%, 0 100%); padding-left:22px; position:relative; z-index:1; }
.hero-bar-link{ display:flex; align-items:center; gap:12px; padding:10px 0 10px 40px; color:#fff; text-decoration:underline; text-underline-offset:4px; font-size:.98rem; }
.hero-bar-link .txt{ min-width:0; }
.hero-bar-link .arr{ flex:none; display:inline-grid; place-items:center; width:30px; height:30px; background:rgba(255,255,255,.22); text-decoration:none; }

@media (max-width:900px){
  .hero--slider{ min-height:0; }
  .hero-stage{ flex-direction:column; align-items:stretch; justify-content:flex-end; gap:28px; padding-top:56px; padding-bottom:28px; }
  .hero-title{ font-size:clamp(2.3rem, 12.5vw, 4rem); }
  .hero-side{ width:100%; align-self:stretch; }
  .hero-box{ padding:28px 24px 26px; min-height:0; }
  .hero-copy h3{ font-size:1.45rem; }
  .hero-bar-inner{ min-height:0; }
  .hero-bar-label{ padding-right:38px; font-size:1rem; }
  .hero-bar-link{ padding-left:32px; font-size:.86rem; }
}
@media (prefers-reduced-motion: reduce){ .hero-slide, .hero-copy{ transition:none; } }

/* Dự án biểu tượng: chữ nằm trong box màu vát góc */
.iconic-card::after{ background:linear-gradient(0deg, rgba(17,12,11,.35) 0%, rgba(17,12,11,0) 45%); }
.iconic-card .cap{ left:24px; right:auto; bottom:24px; padding:26px 30px 24px; max-width:min(440px, calc(100% - 48px));
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(255,255,255,.14) 0%, rgba(255,255,255,0) 55%),
    linear-gradient(150deg, #e2202a 0%, #c8161f 46%, #93101a 100%);
  clip-path:polygon(26px 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%, 0 26px); }
.iconic-card .cap .k{ color:#fff; opacity:.9; }
.iconic-card .cap h3{ font-size:clamp(1.15rem, 1.8vw, 1.5rem); max-width:none; }
.iconic-card .cap p{ color:rgba(255,255,255,.92); max-width:none; }

@media (max-width:900px){ .hide-sm{ display:none; } .hero-bar-link{ gap:10px; } }

.route{display:none;}
.route.active{display:block;}