/* MINH THANG HN — Premium construction studio design system */
:root {
  --navy: #0b1b2b;
  --navy-2: #12283d;
  --navy-3: #1b3852;
  --ink: #18283a;
  --muted: #697789;
  --muted-light: #aab6c2;
  --gold: #c99a3b;
  --gold-bright: #e5bd68;
  --gold-pale: #f3e6c9;
  --paper: #f7f6f2;
  --paper-2: #efeee9;
  --line: #e3e1da;
  --white: #fff;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --container: 1220px;
  --shadow-sm: 0 8px 24px rgba(11, 27, 43, .07);
  --shadow-md: 0 18px 48px rgba(11, 27, 43, .12);
  --shadow-lg: 0 30px 80px rgba(3, 13, 24, .22);
  --radius: 4px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 105px; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { margin: 0; color: var(--ink); background: #fff; font-family: var(--sans); font-size: 15px; line-height: 1.72; font-weight: 400; letter-spacing: 0; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body, p, li, label, input, select, button, a { overflow-wrap: break-word; }
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid rgba(201,154,59,.55); outline-offset: 3px; }
::selection { color: var(--navy); background: var(--gold-pale); }
.container { width: min(var(--container), calc(100% - 56px)); margin-inline: auto; }
.section { padding: 104px 0; }

/* Thin progress line */
.scroll-progress { position: fixed; inset: 0 auto auto 0; width: 0; height: 3px; background: var(--gold-bright); z-index: 120; box-shadow: 0 0 14px rgba(229,189,104,.35); }

/* Utility bar + navigation */
.topline { color: #c7d0da; background: #071421; font-size: 10px; letter-spacing: .055em; }
.topline-inner { min-height: 36px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.topline-links { display: flex; align-items: center; gap: 26px; }
.topline-links a { transition: color .2s ease; }
.topline-links a:hover { color: var(--gold-bright); }
.topline-links b { color: #fff; margin-left: 5px; font-weight: 700; }
.topline-links a:last-child { color: var(--gold-bright); }
.site-header { position: sticky; top: 0; z-index: 80; height: 84px; color: #fff; background: rgba(11,27,43,.97); border-bottom: 1px solid rgba(255,255,255,.08); box-shadow: 0 10px 28px rgba(3,13,24,.12); backdrop-filter: blur(14px); transition: height .25s ease, background .25s ease; }
.site-header.scrolled { height: 72px; background: rgba(8,22,36,.985); }
.nav-wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; flex-shrink: 0; }
.brand img { width: 48px; height: 48px; object-fit: contain; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.28; white-space: nowrap; }
.brand-copy b { color: #d9e0e7; font-size: 8px; font-weight: 700; letter-spacing: .15em; }
.brand-copy strong { color: #fff; font-size: 16px; line-height: 1.3; font-weight: 800; letter-spacing: .005em; }
.brand-copy small { color: var(--gold-bright); font-size: 8px; font-weight: 700; letter-spacing: .09em; margin-top: 3px; }
.main-nav { display: flex; align-items: center; gap: clamp(12px, 1.7vw, 25px); color: #e4eaf0; font-size: 11px; font-weight: 650; }
.main-nav > a:not(.nav-cta) { position: relative; display: inline-flex; align-items: center; min-height: 44px; transition: color .2s ease; }
.main-nav > a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 0; bottom: 7px; height: 1px; background: var(--gold-bright); transform: scaleX(0); transform-origin: left; transition: transform .22s ease; }
.main-nav > a:hover, .main-nav > a.active { color: var(--gold-bright); }
.main-nav > a:hover::after, .main-nav > a.active::after { transform: scaleX(1); }
.nav-cta { display: inline-flex; align-items: center; gap: 13px; padding: 12px 16px; color: #111f2e; background: var(--gold-bright); font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .045em; transition: transform .2s ease, background .2s ease; }
.nav-cta:hover { background: #f0cc7e; transform: translateY(-2px); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 10px; border: 1px solid rgba(255,255,255,.2); background: transparent; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 6px 0; background: #fff; transition: transform .2s ease, opacity .2s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* Hero */
.hero { position: relative; display: flex; align-items: center; min-height: 690px; overflow: hidden; isolation: isolate; color: #fff; background: var(--navy); }
.hero-image { position: absolute; inset: 0; z-index: -2; background: url("assets/anh-xay-dung-phan-tho.jpg") center 46% / cover no-repeat; transform: scale(1.02); animation: heroDrift 24s ease-in-out infinite alternate; }
.hero-overlay { position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(6,17,29,.96) 0%, rgba(8,24,40,.88) 44%, rgba(8,24,40,.56) 100%), linear-gradient(0deg, rgba(5,15,26,.66), transparent 52%); }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .13; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 68px 68px; mask-image: linear-gradient(90deg, #000, transparent 70%); }
.hero-layout { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.22fr) minmax(310px, .78fr); align-items: center; gap: clamp(38px, 5vw, 78px); padding: 82px 0 105px; }
.hero-copy { max-width: 710px; min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--gold-bright); font-size: 10px; font-weight: 800; line-height: 1.55; letter-spacing: .095em; }
.eyebrow > span { display: inline-block; width: 28px; height: 1px; flex: 0 0 28px; background: var(--gold); }
.hero h1 { max-width: 720px; margin: 22px 0 22px; color: #fff; font-size: clamp(42px, 4.55vw, 66px); line-height: 1.13; font-weight: 750; letter-spacing: 0; overflow: visible; text-wrap: balance; }
.hero h1 em { display: block; padding: .06em 0 .13em; color: var(--gold-bright); font-family: var(--serif); font-size: 1.02em; font-weight: 400; font-style: italic; line-height: 1.2; letter-spacing: 0; }
.hero-lead { max-width: 610px; margin: 0 0 28px; color: #d0d9e1; font-size: 15px; line-height: 1.82; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 50px; padding: 14px 19px; border: 1px solid transparent; font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .045em; line-height: 1.45; transition: transform .22s ease, background .22s ease, border-color .22s ease, color .22s ease, box-shadow .22s ease; }
.btn:hover { transform: translateY(-3px); }
.btn-gold { color: #152337; background: var(--gold-bright); box-shadow: 0 8px 24px rgba(201,154,59,.16); }
.btn-gold:hover { background: #f0cc7e; box-shadow: 0 12px 30px rgba(201,154,59,.22); }
.btn-ghost { color: #fff; border-color: rgba(255,255,255,.42); background: rgba(255,255,255,.045); }
.btn-ghost:hover { border-color: var(--gold-bright); background: rgba(255,255,255,.1); }
.btn-dark { color: #fff; background: var(--navy); }
.btn-dark:hover { background: var(--navy-3); }
.btn-outline-light { color: #fff; background: transparent; border-color: rgba(255,255,255,.34); }
.btn-outline-light:hover { border-color: var(--gold-bright); color: var(--gold-bright); }
.btn-full { width: 100%; margin-top: 18px; }
.hero-proof { display: flex; align-items: center; gap: 14px; margin-top: 42px; }
.proof-mark { display: grid; place-items: center; width: 47px; height: 47px; flex: 0 0 47px; border: 1px solid rgba(229,189,104,.72); color: var(--gold-bright); font: italic 18px var(--serif); }
.hero-proof p { display: flex; flex-direction: column; gap: 3px; margin: 0; }
.hero-proof b { color: #fff; font-size: 10px; line-height: 1.5; letter-spacing: .04em; }
.hero-proof span { color: #b9c6d2; font-size: 12px; line-height: 1.55; }
.quick-card { position: relative; padding: 30px; color: var(--ink); background: rgba(255,255,255,.98); border: 1px solid rgba(255,255,255,.7); border-top: 3px solid var(--gold); box-shadow: var(--shadow-lg); }
.quick-card::before { content: ""; position: absolute; top: -3px; right: 30px; width: 52px; height: 3px; background: var(--navy-3); }
.quick-card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.mini-label { color: #90703a; font-size: 9px; font-weight: 800; line-height: 1.55; letter-spacing: .07em; }
.quick-icon { display: grid; place-items: center; width: 34px; height: 34px; color: #9b793d; border: 1px solid var(--line); font-size: 17px; }
.quick-card h2 { margin: 15px 0 8px; color: var(--navy); font-size: 25px; line-height: 1.22; font-weight: 700; letter-spacing: 0; }
.quick-intro { margin: 0 0 17px; color: var(--muted); font-size: 13px; line-height: 1.72; }
.quick-card label { display: block; margin: 13px 0 6px; color: #405166; font-size: 11px; font-weight: 700; line-height: 1.5; }
.quick-card select { width: 100%; min-height: 44px; padding: 0 12px; color: #25394f; border: 1px solid #dce2e7; border-radius: 2px; background: #fbfcfd; font-size: 13px; line-height: 1.4; outline: none; }
.quick-card select:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(201,154,59,.12); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-note { display: block; margin-top: 10px; color: #788595; text-align: center; font-size: 10px; line-height: 1.55; }
.hero-bottom { position: absolute; right: 0; bottom: 0; left: 0; border-top: 1px solid rgba(255,255,255,.2); }
.hero-bottom-inner { display: flex; align-items: center; justify-content: space-between; min-height: 48px; gap: 18px; color: #b8c4cf; font-size: 9px; font-weight: 650; letter-spacing: .055em; }
.hero-bottom-inner a { color: var(--gold-bright); }
@keyframes heroDrift { from { transform: scale(1.02) translateX(0); } to { transform: scale(1.08) translateX(-.8%); } }

/* Three clarity principles */
.trust-strip { background: var(--paper); border-bottom: 1px solid var(--line); }
.trust-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); }
.trust-item { display: flex; align-items: center; gap: 16px; min-width: 0; padding: 25px 28px; border-right: 1px solid var(--line); }
.trust-item:first-child { padding-left: 0; }
.trust-item:last-child { border-right: 0; }
.trust-num { flex: 0 0 auto; color: var(--gold); font: italic 30px/1 var(--serif); }
.trust-item div { display: flex; flex-direction: column; min-width: 0; }
.trust-item b { color: var(--navy); font-size: 13px; line-height: 1.45; font-weight: 750; }
.trust-item small { margin-top: 4px; color: var(--muted); font-size: 11px; line-height: 1.6; }

/* About */
.intro-section { background: #fff; }
.intro-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: clamp(48px,7vw,100px); align-items: center; }
.intro-visual { position: relative; min-height: 480px; padding: 0 40px 36px 0; }
.intro-visual::before { content: ""; position: absolute; inset: 28px 0 0 28px; border: 1px solid var(--gold); }
.intro-visual > img { position: relative; z-index: 1; display: block; width: 100%; height: 440px; object-fit: cover; box-shadow: var(--shadow-md); }
.visual-caption { position: absolute; z-index: 2; left: -13px; bottom: 3px; display: flex; flex-direction: column; gap: 4px; min-width: 260px; padding: 17px 22px; color: #fff; background: var(--navy); box-shadow: var(--shadow-sm); }
.visual-caption span { color: var(--gold-bright); font-size: 9px; font-weight: 800; line-height: 1.5; letter-spacing: .09em; }
.visual-caption b { color: #fff; font: 18px/1.35 var(--serif); }
.visual-stamp { position: absolute; z-index: 2; top: 12px; right: 10px; display: flex; flex-direction: column; align-items: center; justify-content: center; width: 78px; height: 78px; border: 5px solid rgba(255,255,255,.78); border-radius: 50%; color: var(--navy); background: var(--gold-bright); box-shadow: var(--shadow-sm); }
.visual-stamp b { font: italic 22px/1 var(--serif); }
.visual-stamp span { margin-top: 4px; font-size: 6px; font-weight: 800; line-height: 1.35; letter-spacing: .08em; text-align: center; }
.eyebrow-dark { color: #97702c; }
.intro-copy h2, .section-head h2 { margin: 15px 0 20px; color: var(--navy); font-size: clamp(32px,3.5vw,46px); line-height: 1.2; font-weight: 700; letter-spacing: 0; text-wrap: pretty; }
.intro-copy h2 em, .section-head h2 em { color: #ad813a; font: italic 400 1.02em/1.24 var(--serif); letter-spacing: 0; }
.intro-copy p { margin: 0 0 14px; color: #627184; font-size: 14px; line-height: 1.85; }
.text-link { display: inline-flex; align-items: center; gap: 15px; margin-top: 12px; padding: 11px 0; border-bottom: 1px solid var(--gold); color: var(--navy); font-size: 11px; font-weight: 800; line-height: 1.5; text-transform: uppercase; letter-spacing: .035em; }
.text-link span { color: #a67a34; }
.intro-signature { display: flex; align-items: center; gap: 12px; margin-top: 28px; color: #927b57; font-size: 9px; font-weight: 750; line-height: 1.5; letter-spacing: .09em; }
.signature-line { width: 40px; height: 1px; background: var(--gold); }

/* Services */
.services-section { background: var(--paper); border-block: 1px solid #e9e6df; }
.section-head { margin-bottom: 42px; }
.split-head { display: grid; grid-template-columns: minmax(0,1fr) minmax(250px,.68fr); align-items: end; gap: 56px; }
.section-head h2 { margin-bottom: 0; }
.split-head > p { max-width: 440px; margin: 0 0 6px; color: var(--muted); font-size: 14px; line-height: 1.82; }
.service-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 14px; }
.service-card { position: relative; display: flex; flex-direction: column; min-width: 0; min-height: 325px; padding: 25px 23px 23px; border: 1px solid #e5e2da; background: #fff; box-shadow: 0 4px 16px rgba(11,27,43,.025); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.service-card::before { content: ""; position: absolute; top: -1px; left: 22px; width: 42px; height: 3px; background: var(--gold); transition: width .25s ease; }
.service-card:hover { transform: translateY(-6px); border-color: #d5bd8a; box-shadow: var(--shadow-md); }
.service-card:hover::before { width: calc(100% - 44px); }
.service-featured { color: #fff; border-color: var(--navy); background: linear-gradient(150deg, #19334d, #0b1b2b 72%); }
.service-featured::before { background: var(--gold-bright); }
.service-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; color: #8f7955; font-size: 9px; font-weight: 800; line-height: 1.5; letter-spacing: .07em; }
.service-featured .service-top { color: #d6c49f; }
.service-arrow { color: var(--gold); font-size: 18px; line-height: 1; }
.service-icon { display: grid; place-items: center; width: 54px; height: 54px; margin: 34px 0 18px; border: 1px solid #d9bf8a; color: #aa803b; background: #fbf8f0; }
.service-featured .service-icon { border-color: rgba(229,189,104,.42); color: var(--gold-bright); background: rgba(255,255,255,.06); }
.service-icon svg { width: 31px; height: 31px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.service-card h3 { margin: 0 0 10px; color: var(--navy); font-size: 18px; line-height: 1.32; font-weight: 750; }
.service-featured h3 { color: #fff; }
.service-card p { margin: 0 0 22px; color: var(--muted); font-size: 13px; line-height: 1.78; }
.service-featured p { color: #c6d0d9; }
.service-card > a { display: inline-flex; align-items: center; gap: 9px; margin-top: auto; color: #906c2e; font-size: 11px; font-weight: 800; line-height: 1.5; }
.service-featured > a { color: var(--gold-bright); }
.service-card > a span { transition: transform .2s ease; }
.service-card > a:hover span { transform: translateX(4px); }

/* Project library */
.project-section { color: #fff; background: var(--navy); overflow: hidden; }
.project-section::before { content: ""; position: absolute; }
.project-head { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-bottom: 34px; }
.project-head > div { max-width: 720px; }
.project-head h2 { margin: 15px 0 14px; color: #fff; font-size: clamp(34px,4vw,52px); line-height: 1.18; font-weight: 700; letter-spacing: 0; }
.project-head h2 em { color: var(--gold-bright); font: italic 400 1.02em/1.24 var(--serif); }
.project-head > div > p { max-width: 650px; margin: 0; color: #b9c5d0; font-size: 14px; line-height: 1.8; }
.project-tools { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin: 28px 0 23px; padding: 12px; border: 1px solid rgba(255,255,255,.13); background: rgba(255,255,255,.045); }
.filter-tabs { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.filter-btn { min-height: 36px; padding: 8px 13px; color: #cbd5df; border: 1px solid transparent; background: transparent; font-size: 11px; font-weight: 650; line-height: 1.45; cursor: pointer; transition: color .2s ease, background .2s ease, border-color .2s ease; }
.filter-btn:hover { color: var(--gold-bright); border-color: rgba(229,189,104,.3); }
.filter-btn.active { color: var(--navy); background: var(--gold-bright); border-color: var(--gold-bright); }
.project-search { display: flex; align-items: center; gap: 9px; width: min(250px,100%); min-height: 39px; padding: 0 11px; color: #b9c5d0; border: 1px solid rgba(255,255,255,.18); background: rgba(0,0,0,.12); }
.project-search > span { font-size: 19px; }
.project-search input { width: 100%; min-width: 0; color: #fff; border: 0; outline: 0; background: transparent; font-size: 12px; line-height: 1.5; }
.project-search input::placeholder { color: #9ba9b8; }
.project-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; align-items: stretch; }
.project-card { min-width: 0; overflow: hidden; border: 1px solid rgba(255,255,255,.12); background: #132b42; transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease; }
.project-card:hover { transform: translateY(-5px); border-color: rgba(229,189,104,.52); box-shadow: 0 18px 42px rgba(0,0,0,.22); }
.project-card[hidden] { display: none !important; }
.project-large { grid-column: span 2; }
.project-photo { position: relative; height: 250px; overflow: hidden; background: #20374c; }
.project-large .project-photo { height: 320px; }
.project-photo::after { content: ""; position: absolute; inset: 45% 0 0; pointer-events: none; background: linear-gradient(0deg, rgba(4,14,25,.5), transparent); }
.project-photo img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .55s cubic-bezier(.2,.7,.2,1), filter .4s ease; }
.project-card:hover .project-photo img { transform: scale(1.055); filter: saturate(1.05); }
.image-tag { position: absolute; z-index: 2; left: 16px; top: 16px; padding: 7px 10px; color: #13263a; background: var(--gold-bright); font-size: 9px; font-weight: 800; line-height: 1.45; letter-spacing: .055em; }
.zoom-link { position: absolute; z-index: 3; right: 15px; bottom: 15px; display: grid; place-items: center; width: 38px; height: 38px; color: #fff; border: 1px solid rgba(255,255,255,.62); background: rgba(7,20,33,.38); backdrop-filter: blur(8px); font-size: 18px; transition: color .2s ease, background .2s ease, border-color .2s ease; }
.zoom-link:hover { color: var(--navy); background: var(--gold-bright); border-color: var(--gold-bright); }
.project-info { display: flex; justify-content: space-between; align-items: end; gap: 14px; min-height: 88px; padding: 17px 18px; }
.project-info > div { min-width: 0; }
.project-info small { display: block; margin-bottom: 6px; color: var(--gold-bright); font-size: 9px; font-weight: 800; line-height: 1.45; letter-spacing: .08em; }
.project-info h3 { margin: 0; color: #fff; font-size: 15px; line-height: 1.38; font-weight: 700; }
.project-info > span { flex: 0 0 auto; color: #b9c5d0; font-size: 10px; line-height: 1.5; text-align: right; }
.no-results { margin: 26px 0 0; padding: 18px; color: #c7d1db; border: 1px dashed rgba(255,255,255,.25); text-align: center; font-size: 13px; }

/* Process timeline */
.process-section { background: #fff; }
.process-grid { position: relative; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 24px; padding-top: 7px; }
.process-grid::before { content: ""; position: absolute; top: 35px; left: 9%; right: 9%; height: 1px; background: #e0d6c5; }
.process-item { position: relative; z-index: 1; min-width: 0; padding: 0 4px; }
.process-index { display: grid; place-items: center; width: 58px; height: 58px; margin-bottom: 23px; color: var(--navy); border: 1px solid #d4b578; border-radius: 50%; background: #fff; box-shadow: 0 0 0 7px #fff; font: italic 20px/1 var(--serif); }
.process-line { display: none; }
.process-item h3 { margin: 0 0 9px; color: var(--navy); font-size: 16px; line-height: 1.42; font-weight: 750; }
.process-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* Service area */
.area-section { color: #fff; background: linear-gradient(120deg, #0c1c2c, #17324a); }
.area-layout { display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); gap: 70px; align-items: center; }
.area-copy h2 { margin: 16px 0 18px; color: #fff; font-size: clamp(34px,3.8vw,48px); line-height: 1.2; font-weight: 700; }
.area-copy h2 em { color: var(--gold-bright); font: italic 400 1.02em/1.24 var(--serif); }
.area-copy p { max-width: 510px; margin: 0 0 25px; color: #c1ccd6; font-size: 14px; line-height: 1.86; }
.area-cards { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.area-card { position: relative; display: flex; flex-direction: column; justify-content: center; min-height: 140px; padding: 23px 24px; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.045); transition: background .22s ease, border-color .22s ease, transform .22s ease; }
.area-card:hover { transform: translateY(-3px); border-color: rgba(229,189,104,.55); background: rgba(255,255,255,.085); }
.area-card > span { position: absolute; top: 14px; right: 15px; color: var(--gold-bright); font: italic 17px/1 var(--serif); }
.area-card b { color: #fff; font-size: 19px; line-height: 1.35; font-weight: 750; }
.area-card small { margin-top: 6px; color: #b8c5d0; font-size: 11px; line-height: 1.55; }

/* Insights / editorial cards */
.insights-section { background: var(--paper); border-top: 1px solid #e9e6df; }
#insights .section-head { display: grid; grid-template-columns: minmax(0,1fr) minmax(240px,.68fr); align-items: end; gap: 50px; margin-bottom: 38px; }
#insights .section-head h2 { max-width: 620px; margin: 14px 0 0; font-size: clamp(33px,3.6vw,46px); line-height: 1.2; }
#insights .section-head h2 em { display: inline; color: #a77e38; font: italic 400 1em/1.24 var(--serif); }
#insights .section-head > p { max-width: 430px; margin: 0 0 5px; color: var(--muted); font-size: 14px; line-height: 1.82; }
.insight-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 15px; align-items: stretch; }
.insight-card { position: relative; display: flex; flex-direction: column; min-width: 0; min-height: 320px; overflow: hidden; padding: 27px 26px 24px; border: 1px solid #e4e0d7; background: #fff; box-shadow: 0 5px 17px rgba(11,27,43,.025); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.insight-card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--gold), transparent 72%); }
.insight-card:hover { transform: translateY(-5px); border-color: #d4bd8d; box-shadow: var(--shadow-md); }
.insight-number { color: #d5bd8e; font: italic 38px/1.12 var(--serif); }
.insight-meta { margin-top: 19px; color: #94713a; font-size: 9px; font-weight: 800; line-height: 1.55; letter-spacing: .075em; }
.insight-card h3 { margin: 12px 0 11px; color: var(--navy); font-size: 19px; line-height: 1.35; font-weight: 750; letter-spacing: 0; }
.insight-card p { margin: 0 0 22px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.insight-card > a { display: inline-flex; align-items: center; gap: 9px; margin-top: auto; padding-top: 4px; color: #89672e; font-size: 11px; font-weight: 800; line-height: 1.5; }
.insight-card > a span { transition: transform .2s ease; }
.insight-card > a:hover span { transform: translateX(4px); }

/* Contact */
.contact-section { position: relative; overflow: hidden; padding: 86px 0; color: #fff; background: #081827; isolation: isolate; }
.contact-pattern { position: absolute; inset: 0; z-index: -1; opacity: .18; background-image: linear-gradient(135deg, transparent 48%, rgba(229,189,104,.35) 49%, transparent 50%), linear-gradient(45deg, transparent 48%, rgba(255,255,255,.12) 49%, transparent 50%); background-size: 74px 74px; mask-image: linear-gradient(90deg, transparent, #000 45%, #000); }
.contact-layout { display: grid; grid-template-columns: minmax(0,1fr) minmax(310px,.75fr); gap: clamp(40px,7vw,95px); align-items: center; }
.contact-layout h2 { margin: 16px 0 15px; color: #fff; font-size: clamp(36px,4.2vw,54px); line-height: 1.18; font-weight: 700; }
.contact-layout h2 em { color: var(--gold-bright); font: italic 400 1.02em/1.24 var(--serif); }
.contact-layout > div:first-child > p { max-width: 530px; margin: 0; color: #c2ccd5; font-size: 14px; line-height: 1.82; }
.contact-actions { padding: 26px; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.055); box-shadow: 0 20px 55px rgba(0,0,0,.15); }
.contact-phone { display: flex; flex-direction: column; padding: 0 0 21px; margin-bottom: 18px; border-bottom: 1px solid rgba(255,255,255,.15); }
.contact-phone small { color: var(--gold-bright); font-size: 9px; font-weight: 800; line-height: 1.5; letter-spacing: .09em; }
.contact-phone b { margin-top: 8px; color: #fff; font-size: clamp(26px,3vw,34px); line-height: 1.25; font-weight: 750; letter-spacing: 0; }
.contact-phone span { margin-top: 6px; color: #c2ccd5; font-size: 11px; line-height: 1.5; }
.social-follow { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-top: 18px; padding-top: 17px; border-top: 1px solid rgba(255,255,255,.13); }
.social-follow-label { flex: 0 0 100%; color: #c0cad4; font-size: 9px; font-weight: 800; line-height: 1.5; letter-spacing: .08em; }
.social-link { display: inline-flex; flex: 1 1 0; align-items: center; justify-content: center; gap: 8px; min-width: 0; padding: 10px 11px; color: #fff; border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.045); font-size: 12px; font-weight: 700; line-height: 1.5; transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease; }
.social-link:hover { transform: translateY(-2px); color: var(--gold-bright); border-color: var(--gold-bright); background: rgba(255,255,255,.09); }
.social-link svg, .footer-socials svg { display: block; width: 18px; height: 18px; flex: 0 0 18px; fill: currentColor; }
.social-arrow { margin-left: auto; color: var(--gold-bright); }

/* Footer */
.site-footer { color: #d2dbe4; background: #061320; }
.footer-main { display: grid; grid-template-columns: minmax(250px,1.45fr) minmax(120px,.7fr) minmax(150px,.8fr) minmax(140px,.7fr); gap: 38px; padding: 57px 0 43px; }
.footer-brand p { max-width: 310px; margin: 18px 0 0; color: #9eacb9; font-size: 12px; line-height: 1.8; }
.footer-socials { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
.footer-socials a { display: inline-flex; align-items: center; gap: 8px; padding: 8px 11px; color: #d2dbe4; border: 1px solid rgba(255,255,255,.17); font-size: 11px; line-height: 1.5; transition: color .2s ease, border-color .2s ease, background .2s ease; }
.footer-socials a:hover { color: var(--gold-bright); border-color: var(--gold); background: rgba(255,255,255,.045); }
.footer-col { display: flex; flex-direction: column; align-items: flex-start; gap: 11px; font-size: 12px; line-height: 1.6; }
.footer-col > b { margin-bottom: 5px; color: var(--gold-bright); font-size: 9px; line-height: 1.5; letter-spacing: .1em; }
.footer-col a { color: #b9c4ce; transition: color .2s ease; }
.footer-col a:hover { color: var(--gold-bright); }
.footer-note { padding-left: 22px; border-left: 1px solid rgba(255,255,255,.16); }
.footer-note > span { color: #a6b2bd; font-size: 9px; font-weight: 800; line-height: 1.5; letter-spacing: .1em; }
.footer-note p { margin: 12px 0 0; color: #fff; font: 25px/1.2 var(--serif); }
.footer-note em { color: var(--gold-bright); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 18px; min-height: 55px; border-top: 1px solid rgba(255,255,255,.12); color: #81909d; font-size: 10px; line-height: 1.55; }
.footer-bottom span:last-child { color: #aab5bf; font-weight: 700; font-size: 9px; letter-spacing: .07em; }

/* Floating actions */
.floating-call, .floating-zalo { position: fixed; z-index: 75; right: 22px; display: inline-flex; align-items: center; justify-content: center; box-shadow: 0 8px 25px rgba(4,15,27,.22); }
.floating-call { bottom: 88px; width: 58px; height: 58px; flex-direction: column; gap: 1px; color: var(--navy); border: 1px solid rgba(255,255,255,.3); border-radius: 50%; background: var(--gold-bright); }
.floating-call span { font-size: 20px; line-height: 1.1; }
.floating-call small { font-size: 8px; font-weight: 800; line-height: 1.2; }
.floating-zalo { bottom: 20px; width: 58px; height: 42px; color: #fff; border-radius: 22px; background: #0879df; font-size: 12px; font-weight: 800; }
.mobile-contact-bar { display: none; }

/* Toast + image viewer */
.toast { position: fixed; z-index: 150; left: 50%; bottom: 26px; max-width: min(520px,calc(100% - 32px)); padding: 13px 18px; color: #fff; border: 1px solid rgba(255,255,255,.12); background: #10263b; box-shadow: var(--shadow-md); font-size: 12px; line-height: 1.6; opacity: 0; visibility: hidden; transform: translate(-50%,12px); transition: opacity .2s ease, transform .2s ease, visibility .2s ease; }
.toast.show { opacity: 1; visibility: visible; transform: translate(-50%,0); }
.image-lightbox { position: fixed; width: min(1100px,calc(100% - 28px)); max-width: none; max-height: calc(100% - 28px); padding: 18px; border: 1px solid rgba(255,255,255,.15); color: #fff; background: #061320; box-shadow: var(--shadow-lg); }
.image-lightbox::backdrop { background: rgba(2,9,16,.86); backdrop-filter: blur(6px); }
.image-lightbox[open] { display: grid; justify-items: center; gap: 10px; }
.image-lightbox img { display: block; max-width: 100%; max-height: calc(100vh - 115px); width: auto; height: auto; object-fit: contain; }
.image-lightbox p { margin: 0; color: #c7d1da; font-size: 12px; line-height: 1.5; text-align: center; }
.lightbox-close { position: absolute; top: 7px; right: 7px; width: 36px; height: 36px; color: #fff; border: 1px solid rgba(255,255,255,.3); background: rgba(0,0,0,.45); font-size: 25px; line-height: 1; cursor: pointer; }

/* Reveal / reduced motion */
.reveal { opacity: 1; transform: none; transition: opacity .65s ease, transform .65s cubic-bezier(.2,.7,.2,1); }
.js .reveal:not(.visible) { opacity: 0; transform: translateY(18px); }
.js .reveal.visible { opacity: 1; transform: translateY(0); }

/* Large and medium screens */
@media (max-width: 1120px) {
  .container { width: min(var(--container),calc(100% - 44px)); }
  .hero-layout { grid-template-columns: minmax(0,1fr) minmax(290px,.78fr); gap: 34px; }
  .hero h1 { font-size: clamp(40px,4.8vw,56px); }
  .main-nav { gap: 11px; font-size: 10px; }
  .brand-copy strong { font-size: 15px; }
  .service-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .service-card { min-height: 295px; }
  .area-layout { gap: 40px; }
}
@media (max-width: 920px) {
  .topline { display: none; }
  .site-header, .site-header.scrolled { height: 72px; }
  .menu-toggle { display: block; }
  .main-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 12px 24px 20px; border-top: 1px solid rgba(255,255,255,.1); background: #091a29; box-shadow: 0 20px 35px rgba(3,13,24,.24); }
  .main-nav.open { display: flex; }
  .main-nav > a:not(.nav-cta) { min-height: 46px; border-bottom: 1px solid rgba(255,255,255,.09); }
  .main-nav > a:not(.nav-cta)::after { display: none; }
  .nav-cta { justify-content: center; margin-top: 13px; }
  .hero { min-height: 0; }
  .hero-layout { grid-template-columns: minmax(0,1fr); max-width: 780px; padding: 72px 0 102px; gap: 34px; }
  .hero-copy { max-width: 760px; }
  .hero h1 { max-width: 690px; font-size: clamp(40px,6vw,58px); }
  .quick-card { width: min(100%,620px); }
  .intro-grid { gap: 44px; }
  .intro-visual { min-height: 420px; }
  .intro-visual > img { height: 390px; }
  .split-head, #insights .section-head { grid-template-columns: minmax(0,1fr); gap: 13px; }
  .split-head > p, #insights .section-head > p { max-width: 620px; }
  .project-head { align-items: start; }
  .area-layout { grid-template-columns: minmax(0,1fr); }
  .area-copy { max-width: 680px; }
  .footer-main { grid-template-columns: minmax(0,1.3fr) minmax(120px,.7fr) minmax(150px,.8fr); }
  .footer-note { display: none; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 80px; }
  .container { width: calc(100% - 36px); }
  .section { padding: 72px 0; }
  .brand img { width: 43px; height: 43px; }
  .brand-copy strong { font-size: 14px; }
  .brand-copy b { font-size: 7px; }
  .brand-copy small { font-size: 7px; letter-spacing: .07em; }
  .hero-layout { padding: 58px 0 95px; gap: 29px; }
  .eyebrow { font-size: 9px; letter-spacing: .065em; }
  .hero h1 { margin: 17px 0 18px; font-size: clamp(34px,8.4vw,46px); line-height: 1.15; letter-spacing: 0; }
  .hero h1 br { display: none; }
  .hero h1 em { display: block; margin-top: 4px; font-size: 1em; line-height: 1.2; }
  .hero-lead { margin-bottom: 22px; font-size: 14px; line-height: 1.78; }
  .hero-actions { display: grid; grid-template-columns: 1fr; gap: 9px; max-width: 380px; }
  .hero-actions .btn { width: 100%; }
  .hero-proof { margin-top: 30px; }
  .hero-bottom-inner { min-height: 43px; font-size: 8px; letter-spacing: .02em; }
  .hero-bottom-inner span:nth-child(2) { display: none; }
  .quick-card { padding: 23px 20px 21px; }
  .quick-card h2 { font-size: 23px; }
  .quick-intro { font-size: 12px; }
  .form-row { gap: 9px; }
  .trust-grid { grid-template-columns: 1fr; padding: 6px 0; }
  .trust-item, .trust-item:first-child { padding: 15px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .trust-item:last-child { border-bottom: 0; }
  .trust-num { font-size: 25px; }
  .intro-grid { grid-template-columns: minmax(0,1fr); gap: 40px; }
  .intro-visual { min-height: auto; padding: 0 20px 26px 0; }
  .intro-visual::before { inset: 18px 0 0 18px; }
  .intro-visual > img { height: clamp(255px,74vw,370px); }
  .visual-caption { left: -6px; bottom: 0; min-width: min(250px,80%); padding: 13px 16px; }
  .visual-caption b { font-size: 16px; }
  .visual-stamp { top: 8px; right: 4px; width: 64px; height: 64px; border-width: 4px; }
  .intro-copy h2, .section-head h2, #insights .section-head h2 { font-size: clamp(29px,7.4vw,37px); line-height: 1.2; }
  .intro-copy h2 br, .section-head h2 br, .project-head h2 br, .area-copy h2 br, .contact-layout h2 br { display: none; }
  .intro-copy p, .split-head > p, #insights .section-head > p { font-size: 14px; line-height: 1.8; }
  .section-head { margin-bottom: 29px; }
  .split-head { gap: 12px; }
  .service-grid { grid-template-columns: minmax(0,1fr); gap: 11px; }
  .service-card { min-height: 0; padding: 22px; }
  .service-icon { margin: 24px 0 15px; }
  .service-card p { font-size: 13px; }
  .project-head { flex-direction: column; gap: 20px; margin-bottom: 25px; }
  .project-head h2 { margin: 13px 0 12px; font-size: clamp(31px,7.5vw,40px); line-height: 1.2; }
  .project-head > div > p { font-size: 13px; line-height: 1.78; }
  .project-head .btn { width: 100%; }
  .project-tools { flex-direction: column; align-items: stretch; padding: 10px; }
  .filter-tabs { display: flex; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 3px; scrollbar-width: thin; }
  .filter-btn { flex: 0 0 auto; min-height: 38px; padding: 8px 11px; }
  .project-search { width: 100%; }
  .project-grid { grid-template-columns: minmax(0,1fr); gap: 13px; }
  .project-large { grid-column: auto; }
  .project-photo, .project-large .project-photo { height: clamp(210px,62vw,300px); }
  .project-info { min-height: 82px; padding: 14px; }
  .project-info h3 { font-size: 14px; }
  .project-info > span { font-size: 9px; }
  .process-grid { grid-template-columns: minmax(0,1fr); gap: 20px; padding-top: 0; }
  .process-grid::before { top: 28px; bottom: 28px; left: 28px; right: auto; width: 1px; height: auto; }
  .process-item { display: grid; grid-template-columns: 58px minmax(0,1fr); column-gap: 18px; align-items: start; padding: 0; }
  .process-index { grid-row: span 2; width: 56px; height: 56px; margin: 0; font-size: 18px; }
  .process-item h3 { align-self: end; margin: 3px 0 5px; font-size: 16px; }
  .process-item p { grid-column: 2; font-size: 13px; line-height: 1.75; }
  .area-cards { gap: 9px; }
  .area-card { min-height: 120px; padding: 18px; }
  .area-card b { font-size: 16px; }
  #insights .section-head { gap: 12px; margin-bottom: 26px; }
  .insight-grid { grid-template-columns: minmax(0,1fr); gap: 12px; }
  .insight-card { min-height: 0; padding: 23px 21px; }
  .insight-number { font-size: 34px; }
  .insight-meta { margin-top: 14px; }
  .insight-card h3 { font-size: 18px; line-height: 1.35; }
  .insight-card p { font-size: 14px; line-height: 1.78; }
  .contact-section { padding: 70px 0 90px; }
  .contact-layout { grid-template-columns: minmax(0,1fr); gap: 26px; }
  .contact-layout h2 { font-size: clamp(32px,8vw,44px); line-height: 1.18; }
  .contact-layout > div:first-child > p { font-size: 14px; }
  .contact-actions { padding: 21px; }
  .contact-phone b { font-size: 29px; }
  .footer-main { grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 27px 18px; padding: 42px 0 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col { gap: 9px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; justify-content: center; min-height: 68px; padding: 12px 0; gap: 5px; font-size: 9px; }
  .footer-bottom span:last-child { font-size: 8px; }
  .floating-call, .floating-zalo { display: none; }
  .mobile-contact-bar { position: fixed; z-index: 90; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; padding: 8px 10px calc(8px + env(safe-area-inset-bottom)); background: rgba(7,20,33,.97); border-top: 1px solid rgba(255,255,255,.12); box-shadow: 0 -8px 28px rgba(5,15,26,.18); backdrop-filter: blur(12px); }
  .mobile-contact-bar a { display: flex; align-items: center; justify-content: center; gap: 8px; min-height: 43px; font-size: 12px; font-weight: 800; line-height: 1.4; }
  .mobile-call-link { color: var(--navy); background: var(--gold-bright); }
  .mobile-zalo-link { color: #fff; background: #1478d4; }
  .toast { bottom: 78px; }
}
@media (max-width: 390px) {
  .container { width: calc(100% - 30px); }
  .brand { gap: 8px; }
  .brand img { width: 39px; height: 39px; }
  .brand-copy strong { font-size: 13px; }
  .brand-copy small { font-size: 6px; }
  .hero h1 { font-size: clamp(31px,8vw,36px); line-height: 1.18; }
  .hero h1 em { line-height: 1.22; }
  .eyebrow { font-size: 8px; letter-spacing: .045em; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .area-cards { grid-template-columns: minmax(0,1fr); }
  .area-card { min-height: 95px; }
  .footer-main { gap: 23px 13px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal, .js .reveal:not(.visible) { opacity: 1 !important; transform: none !important; }
}