/* INTA HOME — nền xanh ngọc thương hiệu #006142, điểm nhấn vàng cam #E39D47 của logo */
:root {
  --bg: #004330; --bg-2: #004F38; --bg-3: #005A40; --line: rgba(227,157,71,.32);
  --gold: #E39D47; --gold-2: #F2C07E; --gold-deep: #B8772C; --green: #006142;
  --ink: #F6F1E7; --ink-2: #D3DDD5; --ink-3: #9FB8AB;
  --serif: 'Cormorant Garamond', 'Times New Roman', serif; --sans: 'Be Vietnam Pro', system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1180px, 100% - 32px); margin: 0 auto; }

/* chữ */
.eyebrow { font-size: 12px; letter-spacing: .32em; text-transform: uppercase; color: var(--gold); font-weight: 500; }
.h1, .h2, .h3 { font-family: var(--serif); font-weight: 600; line-height: 1.1; letter-spacing: .01em; }
.h1 { font-size: clamp(38px, 6vw, 76px); }
.h2 { font-size: clamp(30px, 4vw, 50px); }
.h3 { font-size: clamp(22px, 2.4vw, 28px); }
.gold { background: linear-gradient(100deg, var(--gold-2), var(--gold) 45%, var(--gold-deep)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--ink-2); font-size: 17px; max-width: 640px; }
.rule { width: 64px; height: 1px; background: var(--gold); margin: 22px 0; }
.center { text-align: center; } .center .rule, .center .lead { margin-left: auto; margin-right: auto; }

/* nút */
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; border-radius: 999px; font-weight: 600; font-size: 15px; letter-spacing: .04em; cursor: pointer; border: 0; transition: transform .2s, box-shadow .2s, background .2s; }
.btn-gold { background: linear-gradient(100deg, var(--gold-2), var(--gold)); color: #1A1206; box-shadow: 0 10px 30px rgba(227,157,71,.28); }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(227,157,71,.38); }
.btn-line { border: 1px solid var(--gold); color: var(--gold-2); background: transparent; }
.btn-line:hover { background: rgba(227,157,71,.1); }

/* đầu trang */
.top { position: fixed; inset: 0 0 auto; z-index: 50; transition: background .3s, border-color .3s; border-bottom: 1px solid transparent; }
.top.solid { background: rgba(0,52,37,.92); backdrop-filter: blur(10px); border-color: var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 20px; }
.top .logo img { height: 40px; width: auto; }
.nav { display: flex; gap: 28px; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.nav a:hover { color: var(--gold-2); }
.top .call { font-weight: 600; color: var(--gold-2); letter-spacing: .04em; white-space: nowrap; }
@media (max-width: 900px) { .nav { display: none; } .top .logo img { height: 32px; } }

/* hero */
.hero { position: relative; min-height: 100svh; display: grid; align-items: end; padding: 140px 0 80px; overflow: hidden; }
.hero .bg { position: absolute; inset: 0; background-size: cover; background-position: center; transform: scale(1.06); animation: zoom 18s ease-out forwards; }
.hero .bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,52,37,.35) 0%, rgba(0,52,37,.2) 35%, rgba(0,52,37,.92) 88%, var(--bg) 100%), linear-gradient(90deg, rgba(0,52,37,.75), transparent 65%); }
@keyframes zoom { to { transform: scale(1); } }
.hero .wrap { position: relative; }
.hero .chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 34px; }
.chip { border: 1px solid var(--line); color: var(--ink-2); font-size: 13px; padding: 7px 14px; border-radius: 999px; background: rgba(0,52,37,.45); backdrop-filter: blur(4px); }
.chip b { color: var(--gold-2); font-weight: 600; }

/* khối */
section { padding: 110px 0; }
.alt { background: var(--bg-2); }
.grid { display: grid; gap: 24px; }

/* số liệu */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat { padding: 34px 20px; text-align: center; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat .n { font-family: var(--serif); font-size: clamp(40px, 5vw, 64px); line-height: 1; }
.stat .t { color: var(--ink-2); font-size: 14px; margin-top: 8px; }
@media (max-width: 760px) { .stats { grid-template-columns: 1fr 1fr; } .stat:nth-child(2) { border-right: 0; } .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); } }

/* thẻ mẫu nhà */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 50px; }
@media (max-width: 960px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--bg-3); border: 1px solid rgba(255,255,255,.06); border-radius: 4px; overflow: hidden; display: flex; flex-direction: column; transition: border-color .3s, transform .3s; }
.card:hover { border-color: var(--line); transform: translateY(-4px); }
.card .ph { aspect-ratio: 4/5; overflow: hidden; position: relative; }
.card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s; }
.card:hover .ph img { transform: scale(1.05); }
.card .tag { position: absolute; top: 14px; left: 14px; background: rgba(0,52,37,.75); color: var(--gold-2); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; padding: 6px 12px; border: 1px solid var(--line); }
.card .bd { padding: 22px 22px 24px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card .meta { color: var(--ink-3); font-size: 14px; }
.card .price { color: var(--gold-2); font-weight: 600; }
.card .btn { margin-top: auto; justify-content: center; padding: 12px 20px; font-size: 14px; }

/* tab */
.tabs { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 4px; margin-top: 28px; }
.tabs button { background: none; border: 0; color: var(--ink-2); padding: 10px 22px; border-radius: 999px; font: inherit; font-size: 14px; cursor: pointer; letter-spacing: .05em; }
.tabs button.on { background: var(--gold); color: #1A1206; font-weight: 600; }

/* cam kết / quy trình */
.feats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 50px; }
.feat { background: var(--bg); padding: 34px 26px; }
.feat .ic { font-family: var(--serif); font-size: 40px; color: var(--gold); line-height: 1; }
.feat h4 { font-family: var(--serif); font-size: 22px; margin: 14px 0 8px; font-weight: 600; }
.feat p { color: var(--ink-2); font-size: 15px; }
@media (max-width: 900px) { .feats { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .feats { grid-template-columns: 1fr; } }

.steps { counter-reset: s; display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px 40px; margin-top: 56px; }
.step { border-top: 1px solid var(--line); padding-top: 22px; }
.step::before { counter-increment: s; content: '0' counter(s); font-family: var(--serif); font-size: 46px; color: var(--gold); line-height: 1; display: block; margin-bottom: 12px; }
.step h4 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.step p { color: var(--ink-2); font-size: 15px; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }

/* hai cột ảnh + chữ */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 70px; align-items: center; }
.split .ph { position: relative; }
.split .ph img { width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.split .ph::after { content: ''; position: absolute; inset: 18px -18px -18px 18px; border: 1px solid var(--gold); z-index: -1; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 50px; } }

/* form */
.form-box { background: linear-gradient(160deg, #005E43, #00402E); border: 1px solid var(--line); padding: 44px; border-radius: 4px; box-shadow: 0 30px 80px rgba(0,0,0,.45); }
.form-box h3 { margin-bottom: 6px; }
.form-box .sub { color: var(--ink-2); font-size: 15px; margin-bottom: 24px; }
.fg { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.fg .full { grid-column: 1 / -1; }
.fg label { display: block; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 6px; }
.fg input, .fg select { width: 100%; background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.12); color: var(--ink); padding: 14px 14px; border-radius: 3px; font: inherit; font-size: 15px; outline: none; }
.fg select option { background: #004330; }
.fg input:focus, .fg select:focus { border-color: var(--gold); background: rgba(227,157,71,.06); }
.form-box .btn { width: 100%; justify-content: center; margin-top: 20px; padding: 17px; font-size: 16px; }
.form-box .note { color: var(--ink-3); font-size: 13px; margin-top: 12px; text-align: center; }
.form-box .err { color: #FF9C8A; font-size: 14px; margin-top: 10px; display: none; }
.form-box .ok { display: none; text-align: center; padding: 30px 0; }
.form-box .ok .h3 { margin-bottom: 10px; }
@media (max-width: 560px) { .form-box { padding: 30px 20px; } .fg { grid-template-columns: 1fr; } }

/* đánh giá */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 50px; }
.quote { border: 1px solid rgba(255,255,255,.08); padding: 30px; background: var(--bg-3); }
.quote p { font-family: var(--serif); font-size: 21px; line-height: 1.45; color: var(--ink); }
.quote .who { margin-top: 18px; color: var(--gold-2); font-size: 14px; letter-spacing: .06em; }
@media (max-width: 900px) { .quotes { grid-template-columns: 1fr; } }

/* chân trang */
footer { border-top: 1px solid var(--line); padding: 60px 0 110px; color: var(--ink-2); font-size: 15px; }
footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
footer img { height: 44px; width: auto; margin-bottom: 16px; }
footer h5 { color: var(--gold-2); font-size: 12px; letter-spacing: .24em; text-transform: uppercase; margin-bottom: 14px; font-weight: 500; }
footer a:hover { color: var(--gold-2); }
footer .copy { margin-top: 40px; color: var(--ink-3); font-size: 13px; }
@media (max-width: 760px) { footer .cols { grid-template-columns: 1fr; } }

/* nút nổi */
.float { position: fixed; right: 16px; bottom: 18px; z-index: 60; display: flex; flex-direction: column; gap: 10px; }
.float a { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; font-size: 13px; box-shadow: 0 10px 26px rgba(0,0,0,.4); }
.float .zl { background: #0068FF; color: #fff; }
.float .call { background: linear-gradient(140deg, var(--gold-2), var(--gold)); color: #1A1206; animation: ring 2.4s infinite; }
@keyframes ring { 0%, 100% { box-shadow: 0 0 0 0 rgba(227,157,71,.55); } 60% { box-shadow: 0 0 0 16px rgba(227,157,71,0); } }
.mbar { display: none; }
@media (max-width: 700px) {
  .float { display: none; }
  .mbar { display: grid; grid-template-columns: 1fr 1fr 1.3fr; position: fixed; inset: auto 0 0; z-index: 60; background: rgba(0,52,37,.96); border-top: 1px solid var(--line); }
  .mbar a { padding: 14px 6px; text-align: center; font-size: 14px; font-weight: 600; }
  .mbar .g { background: linear-gradient(100deg, var(--gold-2), var(--gold)); color: #1A1206; }
}

/* hiện dần khi cuộn */
.rv { opacity: 0; transform: translateY(26px); transition: opacity .9s, transform .9s; }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .rv { opacity: 1; transform: none; } .hero .bg { animation: none; transform: none; } }