/* ═══════════════════════════════════════════════════════════════
   RevitTech — Redesign 2026-10 · nền sáng, hiện đại
   Dùng chung cho trang chủ (body.rd.home) và các trang con (body.rd).
   Style riêng của từng trang con nằm trong <style> ngay trong trang đó.
   Bản trước: Backup/truoc-redesign-2026-10-13/
     redesign-v1-ban-ve.css (kiểu bản vẽ) · redesign-v2-toi.css (tông tối)
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg: #FFFFFF;
  --bg-2: #F4F8F8;
  --surface: #FFFFFF;
  --surface-2: #F7FAFA;
  --line: rgba(15, 30, 35, .08);
  --line-2: rgba(15, 30, 35, .14);
  --text: #0E1A1E;
  --text-2: #4A5A60;
  --text-3: #7B8A90;
  --teal: #0E8E83;
  --teal-dark: #0B6F66;
  --teal-bright: #2BCEBC;
  --teal-soft: #E6F6F4;
  --teal-glow: rgba(14, 142, 131, .14);
  --amber: #C9741C;
  --orange: var(--amber);
  --amber-soft: #FDF3E7;
  --shadow-sm: 0 1px 2px rgba(15, 30, 35, .05), 0 4px 12px -6px rgba(15, 30, 35, .08);
  --shadow: 0 1px 2px rgba(15, 30, 35, .04), 0 18px 40px -18px rgba(15, 30, 35, .18);
  --shadow-lg: 0 2px 6px rgba(15, 30, 35, .05), 0 40px 80px -30px rgba(15, 30, 35, .28);
  --display: "Plus Jakarta Sans", "Be Vietnam Pro", system-ui, sans-serif;
  --body: "Be Vietnam Pro", system-ui, sans-serif;
  --r-sm: 10px;
  --r: 16px;
  --r-lg: 24px;
  --wrap: 1200px;
  --gutter: max(24px, calc((100% - var(--wrap)) / 2));
  --nav-h: 72px;
}

/* ─── Base ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body { background: var(--bg); color: var(--text); font: 400 16px/1.65 var(--body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul { list-style: none; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 4px; }
strong { font-weight: 600; color: var(--text); }
::selection { background: var(--teal-bright); color: var(--text); }

[hidden] { display: none !important; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 2000; background: var(--teal); color: #fff; padding: 10px 14px; border-radius: var(--r-sm); text-decoration: none; }
.skip-link:focus { top: 12px; }
#scrollProgress { display: none; }
.px-layer { transform: none !important; }
.reveal, .reveal-scale { opacity: 1; transform: none; }

h1, h2, h3, h4 { font-family: var(--display); letter-spacing: -.025em; line-height: 1.1; font-weight: 700; text-wrap: balance; }
p { text-wrap: pretty; }

/* Nhãn nhỏ phía trên tiêu đề */
.hero-badge, .section-tag, .clients-label, .card-badge, .outs-block-kicker, .rm-branch-label, .contact-follow-label, .cm-badge {
  font: 700 13px/1.3 var(--body); letter-spacing: .08em; text-transform: uppercase; color: var(--teal);
}

/* ─── Buttons ──────────────────────────────────────────────── */
.btn-primary, .btn-secondary, .nav-cta, .rm-jobs-btn, .lh-submit, .cm-submit-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 26px; border-radius: 999px; font: 600 15px/1 var(--body); text-decoration: none; cursor: pointer;
  transition: background .2s, color .2s, box-shadow .2s, transform .2s, border-color .2s;
}
.btn-primary, .nav-cta, .lh-submit, .cm-submit-btn {
  background: var(--teal); color: #fff; border: 1px solid var(--teal);
  box-shadow: 0 10px 24px -10px rgba(14, 142, 131, .6);
}
.btn-primary:hover, .nav-cta:hover, .lh-submit:hover, .cm-submit-btn:hover { background: var(--teal-dark); border-color: var(--teal-dark); transform: translateY(-1px); box-shadow: 0 14px 30px -10px rgba(14, 142, 131, .7); }
.btn-secondary, .rm-jobs-btn { background: #fff; color: var(--text); border: 1px solid var(--line-2); box-shadow: var(--shadow-sm); }
.btn-secondary:hover, .rm-jobs-btn:hover { border-color: var(--teal); color: var(--teal); }
.btn-link { color: var(--text); font-weight: 600; text-decoration: none; border-bottom: 1.5px solid var(--line-2); padding-bottom: 3px; transition: color .2s, border-color .2s; }
.btn-link:hover { color: var(--teal); border-color: var(--teal); }

/* ─── NAV ──────────────────────────────────────────────────── */
#mainNav {
  position: fixed; inset: 0 0 auto 0; z-index: 900; height: var(--nav-h);
  display: flex; align-items: center; gap: 28px; padding: 0 var(--gutter);
  background: rgba(255, 255, 255, .82); backdrop-filter: blur(16px) saturate(160%); -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
#mainNav .logo img { height: 40px; width: auto; }
.nav-links { display: flex; gap: 24px; margin-left: auto; }
.nav-links a { text-decoration: none; font-size: 14.5px; font-weight: 500; color: var(--text-2); white-space: nowrap; transition: color .2s; }
.nav-links a:hover { color: var(--teal); }
.nav-links a.nav-ref { color: var(--amber) !important; font-weight: 600 !important; }
.nav-links a.nav-active { color: var(--teal); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-cta { padding: 11px 20px; font-size: 14px; box-shadow: none; }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--line-2); background: #fff; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.nav-toggle span { display: block; width: 18px; height: 1.5px; background: var(--text); transition: transform .2s, opacity .2s; }
.nav-toggle.open span:nth-child(1), .nav-toggle.is-open span:nth-child(1), .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2), .nav-toggle.is-open span:nth-child(2), .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3), .nav-toggle.is-open span:nth-child(3), .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
.nav-backdrop { display: none; }

/* ─── HERO · ảnh nền tự chuyển (lớp học ↔ dự án) ──────────── */
#hero { position: relative; min-height: min(100vh, 900px); display: flex; flex-direction: column; justify-content: flex-end; overflow: hidden; color: #fff; background: #0A1A1C; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 40%; opacity: 0; transform: scale(1.08); transition: opacity 1.4s ease; }
.hero-bg img.on { opacity: 1; animation: heroKb 7s ease-out forwards; }
@keyframes heroKb { from { transform: scale(1.08); } to { transform: scale(1); } }
.hero-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,22,22,.92) 0%, rgba(4,22,22,.72) 42%, rgba(4,22,22,.15) 75%), linear-gradient(0deg, rgba(4,22,22,.78), transparent 42%), linear-gradient(180deg, rgba(4,22,22,.5), transparent 22%); }
.hero-inner { position: relative; z-index: 2; padding: calc(var(--nav-h) + 72px) var(--gutter) 36px; }
#hero .hero-badge { color: #6FF2E2; }
.hero-title { font-size: clamp(44px, 6.4vw, 88px); font-weight: 800; letter-spacing: -.04em; line-height: 1.02; margin: 18px 0 22px; max-width: 12em; }
.hero-title em { font-style: normal; color: #6FF2E2; }
.hero-sub { font-size: 19px; color: rgba(255,255,255,.86); max-width: 32em; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
#hero .btn-primary { background: #2BCEBC; border-color: #2BCEBC; color: #04110F; box-shadow: 0 12px 30px -10px rgba(43,206,188,.7); }
#hero .btn-primary:hover { background: #4FE0D0; border-color: #4FE0D0; }
#hero .btn-secondary { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.3); box-shadow: none; backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
#hero .btn-secondary:hover { background: rgba(255,255,255,.18); color: #fff; }
.hero-strip { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 20px var(--gutter) 24px; }
.hero-cap { display: inline-flex; align-items: center; gap: 10px; padding: 8px 14px; border-radius: 999px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); font-size: 13.5px; font-weight: 600; }
.hero-cap i { width: 8px; height: 8px; border-radius: 50%; background: #6FF2E2; }
.hero-thumbs { display: flex; gap: 8px; }
.hero-thumbs button { position: relative; width: 76px; height: 50px; padding: 0; border-radius: 10px; overflow: hidden; border: 2px solid rgba(255,255,255,.25); opacity: .6; transition: opacity .3s, border-color .3s, transform .3s; }
.hero-thumbs button:hover { opacity: .9; }
.hero-thumbs img { width: 100%; height: 100%; object-fit: cover; }
.hero-thumbs button.on { opacity: 1; border-color: #6FF2E2; transform: translateY(-3px); }
.hero-thumbs button.on::after { content: ""; position: absolute; left: 0; bottom: 0; height: 3px; background: #6FF2E2; animation: heroProg 6s linear forwards; }
@keyframes heroProg { from { width: 0; } to { width: 100%; } }
@media (prefers-reduced-motion: reduce) { .hero-bg img.on { animation: none; transform: none; } .hero-thumbs button.on::after { animation: none; width: 100%; } }
.hero-bar { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); margin: 0 var(--gutter) 32px; border-radius: 20px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.hero-bar > div { padding: 20px 24px; }
.hero-bar > div + div { border-left: 1px solid rgba(255,255,255,.15); }
.hero-bar b { display: block; font: 800 30px/1 var(--display); letter-spacing: -.03em; }
.hero-bar span { display: block; margin-top: 6px; font-size: 13.5px; color: rgba(255,255,255,.75); }
.hero-bar .hl b { color: #F2B35B; }

/* Menu trong suốt khi đang ở đầu trang (JS thêm .scrolled khi cuộn) */
#mainNav { transition: background .3s, border-color .3s; }
body.home #mainNav:not(.scrolled) { background: transparent; border-color: rgba(255,255,255,.12); backdrop-filter: none; -webkit-backdrop-filter: none; }
body.home #mainNav:not(.scrolled) .logo img { background: #fff; border-radius: 8px; padding: 2px; }
body.home #mainNav:not(.scrolled) .nav-cta { background: #2BCEBC; border-color: #2BCEBC; color: #04110F; }
body.home #mainNav:not(.scrolled) .nav-toggle { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.3); }
body.home #mainNav:not(.scrolled) .nav-toggle span { background: #fff; }
@media (min-width: 961px) {
  body.home #mainNav:not(.scrolled) .nav-links a { color: rgba(255,255,255,.82); }
  body.home #mainNav:not(.scrolled) .nav-links a:hover { color: #fff; }
  body.home #mainNav:not(.scrolled) .nav-links a.nav-ref { color: #F2B35B !important; }
}

/* Dải "học viên đang làm tại" */
.clients { display: flex; align-items: center; justify-content: center; gap: 16px 48px; flex-wrap: wrap; padding: 30px var(--gutter); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.clients-label { color: var(--text-3); letter-spacing: .06em; }
.clients ul { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 44px; }
.clients li { font: 800 19px/1 var(--display); letter-spacing: -.01em; color: #8C999E; }

/* ─── SECTIONS ─────────────────────────────────────────────── */
:where(body, main) > section:where(:not(#hero)) { position: relative; padding: 120px var(--gutter); }
#khoa-hoc, #lo-trinh, #faq { background: var(--bg); }
#cong-dong, #du-an { background: var(--bg-2); }

section > div:has(> .section-tag), .section-header, .section-header-center { max-width: 760px; margin: 0 auto 64px; text-align: center; }
.section-tag { display: inline-block; margin-bottom: 16px; padding: 7px 14px; border-radius: 999px; background: var(--teal-soft); }
.section-title { font-size: clamp(32px, 4.2vw, 54px); font-weight: 800; letter-spacing: -.035em; }
.section-sub { margin: 18px auto 0; max-width: 40em; font-size: 17.5px; color: var(--text-2); }

/* ─── KHÓA HỌC ─────────────────────────────────────────────── */
.courses-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.course-card {
  position: relative; display: flex; flex-direction: column; cursor: pointer; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow-sm);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.course-card:hover { transform: translateY(-4px); border-color: rgba(14,142,131,.35); box-shadow: var(--shadow); }
.card-header, .card-body, .course-card .card-pricing, .card-footer { padding: 0 28px; }
.card-header { padding-top: 28px; }
.card-badge { display: inline-block; margin-bottom: 14px; padding: 6px 12px; border-radius: 999px; background: var(--teal-soft); font-size: 11.5px; }
.card-name { font: 800 25px/1.15 var(--display); letter-spacing: -.025em; }
.card-desc { margin-top: 8px; color: var(--text-2); font-size: 15px; }
.card-body { padding-top: 20px; flex: 1; }
.card-body h4 { display: none; }
.feature-list li { position: relative; padding: 6px 0 6px 28px; font-size: 14.5px; color: var(--text-2); }
.feature-list li::before {
  content: ""; position: absolute; left: 0; top: 9px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--teal-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230E8E83' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 11px no-repeat;
}
.feature-list .check { display: none; }
.course-card .card-pricing { margin-top: 22px; }
.cp-row { display: flex; justify-content: space-between; align-items: baseline; padding: 11px 0; border-top: 1px solid var(--line); font-size: 14.5px; }
.cp-label { color: var(--text-3); }
.cp-price, .cp-date { font-weight: 600; }
.cp-price { font: 800 21px/1 var(--display); letter-spacing: -.02em; }
.card-footer { padding-top: 18px; padding-bottom: 28px; }
.card-cta { width: 100%; display: flex; justify-content: center; gap: 8px; padding: 13px 16px; border-radius: 999px; border: 1px solid var(--line-2); background: #fff; font-weight: 600; font-size: 14.5px; transition: background .2s, color .2s, border-color .2s; }
.course-card:hover .card-cta { border-color: var(--teal); color: var(--teal); }

/* Khóa chính */
.course-card--featured {
  grid-column: 1 / -1; display: grid; grid-template-columns: 1.05fr 1fr; grid-template-rows: auto auto 1fr auto auto;
  background: linear-gradient(135deg, #E8F7F5 0%, #FFFFFF 60%); border-color: rgba(14,142,131,.25); box-shadow: var(--shadow);
}
.course-card--featured .card-photo { grid-column: 1; grid-row: 1 / -1; position: relative; min-height: 460px; margin: 12px; border-radius: calc(var(--r-lg) - 8px); overflow: hidden; }
.course-card--featured .card-photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.course-card--featured > :not(.card-photo) { grid-column: 2; padding-left: 36px; padding-right: 40px; position: relative; z-index: 1; }
.course-card--featured .card-header { padding-top: 40px; }
.course-card--featured .card-name { font-size: 40px; letter-spacing: -.035em; }
.course-card--featured .card-badge { background: var(--teal); color: #fff; }
.course-card--featured .feature-list li { color: var(--text); }
.course-card--featured .cp-price { font-size: 30px; color: var(--teal); }
.course-card--featured .card-footer { padding-bottom: 40px; }
.course-card--featured .card-cta { background: var(--teal); color: #fff; border-color: var(--teal); box-shadow: 0 10px 24px -10px rgba(14,142,131,.6); }
.course-card--featured:hover .card-cta { background: var(--teal-dark); border-color: var(--teal-dark); color: #fff; }

/* ─── CỘNG ĐỒNG ────────────────────────────────────────────── */
.community-panels { display: flex; flex-direction: column; gap: 80px; }
.community-panel[hidden] { display: block; }
#community-founder { order: 1; }
#community-classroom { order: 2; }
#community-alumni { order: 3; }

.founder-card {
  display: grid; grid-template-columns: 360px 1fr; grid-template-rows: auto auto auto 1fr; column-gap: 56px; align-items: start;
  padding: 16px 48px 16px 16px; border-radius: var(--r-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow);
}
.founder-avatar { grid-row: 1 / -1; border-radius: calc(var(--r-lg) - 8px); overflow: hidden; }
.founder-avatar img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: top; }
.founder-name { margin-top: 48px; font-size: clamp(28px, 3vw, 40px); font-weight: 800; }
.founder-role { margin-top: 8px; font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--teal); }
.founder-bio { margin-top: 24px; font-size: 19px; line-height: 1.65; color: var(--text-2); max-width: 32em; }
.social-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.social-link { padding: 10px 18px; border-radius: 999px; border: 1px solid var(--line-2); background: #fff; text-decoration: none; font-weight: 600; font-size: 14px; transition: border-color .2s, color .2s; }
.social-link:hover { border-color: var(--teal); color: var(--teal); }

.classroom-gallery { display: grid; grid-template-columns: 1.6fr 1fr 1fr; grid-auto-rows: 250px; gap: 14px; }
.cl-photo { position: relative; overflow: hidden; border-radius: var(--r); background: #DDE5E6; box-shadow: var(--shadow-sm); }
.cl-photo:first-child { grid-row: span 2; }
.cl-photo:nth-child(n+6) { display: none; }
.cl-photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.cl-photo:hover img { transform: scale(1.04); }
.cl-photo::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(8,20,22,.7)); pointer-events: none; }
.cl-caption { position: absolute; left: 16px; right: 16px; bottom: 14px; z-index: 1; font-size: 13.5px; font-weight: 600; color: #fff; }
.cl-tag { display: none; }
.cl-cta-row {
  display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; margin-top: 20px;
  padding: 28px 32px; border-radius: var(--r-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.cl-quote { font: 600 21px/1.45 var(--display); letter-spacing: -.01em; max-width: 34em; }

.alumni-title { font-size: 28px; font-weight: 800; margin-bottom: 28px; text-align: center; }
.alumni-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.alumni-item { display: grid; grid-template-columns: 56px 1fr; column-gap: 14px; align-items: center; padding: 14px; border-radius: var(--r); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.alumni-avatar { grid-row: span 2; }
.alumni-avatar img { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; }
.alumni-name { font-weight: 600; font-size: 15px; align-self: end; }
.alumni-role { font-size: 13px; color: var(--text-2); align-self: start; line-height: 1.4; }

/* ─── LỘ TRÌNH ─────────────────────────────────────────────── */
.roadmap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; position: relative; }
.roadmap::before { content: ""; position: absolute; left: 28px; right: 28px; top: 27px; height: 2px; background: linear-gradient(90deg, var(--teal) 0%, var(--teal) 45%, var(--line-2) 55%); }
.rm-step { position: relative; }
.rm-node { position: relative; z-index: 1; display: grid; place-items: center; width: 56px; height: 56px; margin-bottom: 18px; border-radius: 50%; background: #fff; border: 1px solid var(--line-2); }
.rm-step:nth-child(-n+2) .rm-node { background: var(--teal); border-color: var(--teal); box-shadow: 0 0 0 6px var(--teal-glow); }
.rm-num { font: 800 16px/1 var(--display); color: var(--text-3); }
.rm-step:nth-child(-n+2) .rm-num { color: #fff; }
.rm-card { height: calc(100% - 74px); padding: 24px; border-radius: var(--r-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.rm-step:nth-child(-n+2) .rm-card { border-color: rgba(14,142,131,.3); background: linear-gradient(180deg, #F0FAF8, #fff 60%); }
.rm-role { font-size: 21px; font-weight: 800; }
.rm-role-sub { margin: 6px 0 16px; color: var(--text-2); font-size: 14.5px; }
.rm-skills li { position: relative; padding: 5px 0 5px 16px; font-size: 14px; color: var(--text-2); }
.rm-skills li::before { content: ""; position: absolute; left: 0; top: 14px; width: 6px; height: 6px; border-radius: 50%; background: var(--line-2); }
.rm-step:nth-child(-n+2) .rm-skills li::before { background: var(--teal); }
.rm-branch { display: flex; gap: 20px; align-items: baseline; margin-top: 32px; padding: 20px 24px; border-radius: var(--r); background: var(--teal-soft); }
.rm-branch-label { flex: 0 0 auto; }
.rm-branch p { font-size: 15px; color: var(--text-2); }
.rm-jobs { display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap; margin-top: 32px; }
.rm-jobs-text { color: var(--text-2); }
.rm-jobs-btn svg { width: 16px; height: 16px; }

/* ─── DỰ ÁN ────────────────────────────────────────────────── */
.du-an-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 48px; }
.da-stat { padding: 24px; border-radius: var(--r); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.da-stat-num { font: 800 36px/1 var(--display); letter-spacing: -.035em; color: var(--teal); }
.da-stat-label { margin-top: 8px; font-size: 13.5px; color: var(--text-2); }

.portfolio-tabs { display: flex; flex-wrap: wrap; gap: 6px; width: fit-content; margin: 0 auto 28px; padding: 6px; border-radius: 999px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.portfolio-tab { display: flex; align-items: center; gap: 10px; padding: 10px 20px; border-radius: 999px; text-align: left; color: var(--text-2); transition: background .2s, color .2s; }
.portfolio-tab:hover { color: var(--text); }
.portfolio-tab.active { background: var(--teal); color: #fff; }
.portfolio-tab-flag { font-size: 11.5px; font-weight: 700; letter-spacing: .06em; opacity: .75; }
.portfolio-tab-text { display: flex; flex-direction: column; line-height: 1.25; }
.portfolio-tab-name { font-weight: 700; font-size: 15px; }
.portfolio-tab-count { font-size: 12px; opacity: .8; }
.portfolio-panel { display: none; }
.portfolio-panel.active { display: block; }
.portfolio-panel-header { display: none; }
.portfolio-projects-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.outs-project { padding: 18px; border-radius: var(--r); background: #fff; border: 1px solid var(--line); transition: border-color .2s, box-shadow .2s; }
.outs-project:hover { border-color: rgba(14,142,131,.35); box-shadow: var(--shadow-sm); }
.outs-project-name { font: 700 15.5px/1.3 var(--display); }
.outs-project-desc { margin-top: 4px; font-size: 13.5px; color: var(--text-2); }

.outs-block { margin-top: 80px; }
.outs-block:has(.outs-services), .outs-block:has(.outs-process) { display: none; } /* có đầy đủ ở trang /outsourcing */
.outs-block-head { text-align: center; margin-bottom: 28px; }
.outs-block-kicker { display: block; margin-bottom: 10px; }
.outs-block-title { font-size: 30px; font-weight: 800; }
.bim-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.bim-shot { position: relative; margin: 0; border-radius: var(--r); overflow: hidden; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.bim-shot:nth-child(n+7) { display: none; }
.bim-shot img { width: 100%; height: 240px; object-fit: cover; transition: transform .5s ease; }
.bim-shot:hover img { transform: scale(1.04); }
.bim-shot figcaption { padding: 12px 16px; font-size: 13.5px; font-weight: 600; color: var(--text); border-top: 1px solid var(--line); }
.du-an-cta {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-top: 56px;
  padding: 32px 36px; border-radius: var(--r-lg); background: linear-gradient(120deg, #E3F5F2, #fff); border: 1px solid rgba(14,142,131,.22);
}
.du-an-cta p { font: 800 24px/1.3 var(--display); letter-spacing: -.02em; }
.du-an-cta-btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* ─── FAQ ──────────────────────────────────────────────────── */
.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item { border-radius: var(--r); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); transition: border-color .2s; }
.faq-item.open { border-color: rgba(14,142,131,.35); }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 22px 26px; text-align: left; font: 700 17.5px/1.4 var(--display); letter-spacing: -.01em; }
.faq-icon { position: relative; flex: 0 0 32px; height: 32px; border-radius: 50%; background: var(--bg-2); }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; left: 10px; right: 10px; top: 15px; height: 2px; border-radius: 2px; background: var(--text-2); transition: transform .25s; }
.faq-icon::after { transform: rotate(90deg); }
.faq-item.open .faq-icon { background: var(--teal-soft); }
.faq-item.open .faq-icon::before, .faq-item.open .faq-icon::after { background: var(--teal); }
.faq-item.open .faq-icon::after { transform: rotate(0); }
.faq-a { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .3s ease; }
.faq-item.open .faq-a { grid-template-rows: 1fr; }
.faq-a-inner { overflow: hidden; padding: 0 26px; color: var(--text-2); }
.faq-a-inner > :last-child { margin-bottom: 24px; }
.faq-a-inner p { margin: 0 40px 10px 0; }
.faq-a-inner a { color: var(--teal); }
.faq-bullets { margin: 0 0 10px; }
.faq-bullets li { position: relative; padding: 3px 0 3px 18px; }
.faq-bullets li::before { content: ""; position: absolute; left: 2px; top: 13px; width: 6px; height: 6px; border-radius: 50%; background: var(--teal); }
.faq-cta { margin: 36px auto 0; display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap; color: var(--text-2); }

/* ─── LIÊN HỆ (khối màu teal thương hiệu) ──────────────────── */
#lien-he {
  display: grid; grid-template-columns: 1fr 1fr; column-gap: 72px; align-items: start; overflow: hidden; color: #fff;
  background:
    radial-gradient(50% 70% at 100% 0%, rgba(43,206,188,.45), transparent 70%),
    linear-gradient(135deg, #0B6F66 0%, #0E8E83 60%, #13A193 100%);
}
#lien-he > div:has(> .section-tag) { grid-column: 1; margin: 0 0 36px; text-align: left; }
#lien-he .section-tag { background: rgba(255,255,255,.16); color: #fff; }
#lien-he .section-title { font-size: clamp(36px, 4.4vw, 56px); }
#lien-he .section-sub { margin-left: 0; color: rgba(255,255,255,.85); }
.lh-form-card { grid-column: 2; grid-row: 1 / span 3; padding: 36px; border-radius: var(--r-lg); background: #fff; color: var(--text); box-shadow: 0 40px 80px -30px rgba(4,40,36,.6); }
.lh-form-card h3 { font-size: 26px; font-weight: 800; }
.lh-sub { margin: 6px 0 24px; font-size: 14.5px; color: var(--text-2); }
.lh-row { display: flex; gap: 14px; }
.lh-row .lh-field { flex: 1; }
.lh-field { margin-bottom: 16px; }
.lh-form label, .cm-field > label { display: block; margin-bottom: 8px; font-size: 13.5px; font-weight: 600; color: var(--text-2); }
.lh-form input, .lh-form select, .cm-field input, .cm-field select, .cm-field textarea {
  width: 100%; padding: 14px 16px; font: 500 16px/1.25 var(--body); color: var(--text);
  background: var(--surface-2); border: 1px solid var(--line-2); border-radius: 12px; appearance: none; -webkit-appearance: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.lh-form input::placeholder, .cm-field input::placeholder, .cm-field textarea::placeholder { color: var(--text-3); }
.lh-form select, .cm-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234A5A60' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; background-size: 18px; padding-right: 44px;
}
.lh-form input:focus, .lh-form select:focus, .cm-field input:focus, .cm-field select:focus, .cm-field textarea:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 4px var(--teal-glow); background-color: #fff; }
.req { color: var(--amber); }
.lh-submit { width: 100%; margin-top: 8px; padding: 16px; font-size: 16px; }
.lh-alt { margin-top: 16px; font-size: 14px; color: var(--text-2); text-align: center; }
.lh-alt a { color: var(--teal); font-weight: 600; }
.lh-success .lh-check { font-size: 0; width: 52px; height: 52px; border-radius: 50%; background: var(--teal-soft); position: relative; margin-bottom: 16px; }
.lh-success .lh-check::after { content: ""; position: absolute; left: 20px; top: 13px; width: 10px; height: 20px; border: solid var(--teal); border-width: 0 3px 3px 0; transform: rotate(45deg); }
.lh-success h3 { font-size: 26px; }

.contact-cards { grid-column: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact-card { display: flex; flex-direction: column; padding: 20px; border-radius: var(--r); background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18); text-decoration: none; transition: background .2s; }
.contact-link:hover { background: rgba(255,255,255,.18); }
.contact-card:nth-child(3) { grid-column: 1 / -1; }
.contact-icon { width: 38px; height: 38px; display: grid; place-items: center; margin-bottom: 14px; border-radius: 10px; background: rgba(255,255,255,.16); color: #fff; }
.contact-icon svg { width: 19px; height: 19px; }
.contact-label { font-size: 13px; color: rgba(255,255,255,.75); }
.contact-val { margin-top: 4px; font: 800 22px/1.15 var(--display); letter-spacing: -.02em; }
.contact-follow { grid-column: 1; margin-top: 32px; }
.contact-follow-label { color: rgba(255,255,255,.75); }

.social-hub { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.social-hub a { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 999px; text-decoration: none; font-size: 13.5px; font-weight: 500; transition: background .2s, border-color .2s, color .2s; }
.social-hub svg { width: 15px; height: 15px; }
#lien-he .social-hub a { border: 1px solid rgba(255,255,255,.25); color: #fff; }
#lien-he .social-hub a:hover { background: rgba(255,255,255,.14); }

/* ─── FOOTER ───────────────────────────────────────────────── */
footer { background: var(--bg-2); color: var(--text-3); padding: 72px var(--gutter) 32px; font-size: 14px; border-top: 1px solid var(--line); }
.footer-bg-glow { display: none; }
.footer-inner { display: grid; grid-template-columns: minmax(260px, 1.6fr) repeat(auto-fit, minmax(150px, 1fr)); gap: 40px; }
.footer-logo img { height: 42px; width: auto; }
.footer-brand p { margin: 18px 0 8px; max-width: 30em; color: var(--text-2); }
.footer-addr { margin-bottom: 16px; }
.footer-socials { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.footer-social { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 999px; border: 1px solid var(--line-2); background: #fff; font-size: 13.5px; font-weight: 500; }
.footer-social:hover { border-color: var(--teal); }
.footer-social svg { width: 15px; height: 15px; flex: 0 0 auto; }
.footer-col h4 { font: 800 15px/1.2 var(--display); color: var(--text); margin-bottom: 16px; letter-spacing: 0; }
.footer-col ul { display: grid; gap: 10px; }
footer a { text-decoration: none; color: var(--text-2); transition: color .2s; }
footer a:hover { color: var(--teal); }
footer .social-hub a { border: 1px solid var(--line-2); background: #fff; }
.footer-legal { margin-top: 56px; padding-top: 28px; border-top: 1px solid var(--line); }
.footer-legal-title { color: var(--text); font-weight: 700; }
.fl-mark { display: none; }
.footer-legal-sub { margin-left: 8px; font-weight: 400; color: var(--text-3); }
.footer-legal-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 16px; margin-top: 12px; }
.fl-row { display: flex; flex-direction: column; gap: 2px; }
.fl-label { font-size: 12.5px; }
.fl-value { color: var(--text-2); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 13px; }

/* ─── NÚT NỔI ──────────────────────────────────────────────── */
#floatGroup { position: fixed; right: 24px; bottom: 24px; z-index: 800; display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
#floatCourses { display: none; flex-direction: column; min-width: 250px; padding: 6px; border-radius: var(--r); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-lg); }
#floatCourses.open { display: flex; }
.float-course { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 10px; font-size: 14.5px; font-weight: 500; text-align: left; color: var(--text); text-decoration: none; }
.float-course:hover { background: var(--bg-2); }
.float-course-dot { display: none; }
.float-course--quote { color: var(--amber); font-weight: 600; }
.float-course-sep { padding: 10px 14px 4px; font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--text-3); }
.float-main { display: flex; gap: 10px; }
#floatToggle { display: inline-flex; align-items: center; gap: 10px; padding: 14px 22px; border-radius: 999px; background: var(--teal); color: #fff; font-weight: 700; font-size: 14.5px; box-shadow: 0 12px 28px -10px rgba(14,142,131,.7); }
#floatToggle:hover { background: var(--teal-dark); }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: #fff; }
#floatArrow { font-size: 10px; transition: transform .2s; }
#floatToggle.open #floatArrow { transform: rotate(180deg); }
.zalo-float, #rtbFab { width: 50px; height: 50px; display: grid; place-items: center; border-radius: 50% !important; background: #fff !important; border: 1px solid var(--line-2) !important; box-shadow: var(--shadow) !important; }
#rtbGreet { display: none !important; } /* không tự bật bong bóng chat */
#rtbPanel { border-radius: var(--r-lg); }

/* ─── COOKIE + PRIVACY ─────────────────────────────────────── */
.cookie-banner {
  position: fixed; left: 24px; bottom: 24px; z-index: 950; max-width: 420px; padding: 20px 22px;
  border-radius: var(--r); background: #fff; color: var(--text-2); border: 1px solid var(--line); font-size: 14px; box-shadow: var(--shadow-lg);
  transform: translateY(160%); transition: transform .4s ease;
}
.cookie-banner.is-visible { transform: none; }
.cookie-banner a { color: var(--teal); }
.cookie-actions { display: flex; gap: 8px; margin-top: 14px; }
.cookie-btn { padding: 10px 18px; border-radius: 999px; font-weight: 600; font-size: 14px; border: 1px solid var(--line-2); background: #fff; }
.cookie-btn-accept { background: var(--teal); color: #fff; border-color: var(--teal); }
.cookie-btn-decline:hover { background: var(--bg-2); }

.privacy-modal { position: fixed; inset: 0; z-index: 1100; display: none; align-items: center; justify-content: center; padding: 16px; background: rgba(10,25,28,.45); backdrop-filter: blur(6px); }
.privacy-modal.is-open { display: flex; }
.privacy-modal-content { position: relative; width: min(720px, 100%); max-height: 86vh; overflow-y: auto; padding: 44px; border-radius: var(--r-lg); background: #fff; box-shadow: var(--shadow-lg); }
.privacy-modal-close { position: absolute; right: 16px; top: 16px; width: 40px; height: 40px; border-radius: 50%; background: var(--bg-2); }
.privacy-modal-content h2 { font-size: 32px; font-weight: 800; margin-bottom: 4px; }
.privacy-modal-content h3 { font-size: 19px; margin: 26px 0 8px; }
.privacy-modal-content p, .privacy-modal-content li { color: var(--text-2); font-size: 15px; }
.privacy-modal-content ul { list-style: disc; padding-left: 20px; }
.last-updated { font-size: 13px !important; color: var(--text-3) !important; margin-bottom: 20px; }

/* ─── MODAL ĐĂNG KÝ ────────────────────────────────────────── */
.course-modal-overlay { position: fixed; inset: 0; z-index: 1000; display: none; align-items: flex-start; justify-content: center; padding: 48px 16px; overflow-y: auto; background: rgba(10,25,28,.5); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.course-modal-overlay.open { display: flex; }
.course-modal { position: relative; width: min(660px, 100%); border-radius: var(--r-lg); overflow: hidden; background: #fff; box-shadow: var(--shadow-lg); }
.cm-header { position: relative; padding: 36px 36px 28px; background: radial-gradient(80% 120% at 100% 0%, rgba(43,206,188,.22), transparent 60%), #EEF9F7; border-bottom: 1px solid var(--line); }
.cm-close { position: absolute; right: 16px; top: 16px; width: 40px; height: 40px; border-radius: 50%; background: #fff; box-shadow: var(--shadow-sm); font-size: 14px; }
.cm-close:hover { background: var(--bg-2); }
.cm-icon { display: none; }
.cm-name { margin-top: 10px; font: 800 36px/1.05 var(--display); letter-spacing: -.035em; }
.cm-tagline { margin-top: 10px; color: var(--text-2); font-size: 15px; padding-right: 40px; }
.cm-body { padding: 28px 36px 36px; }
.cm-schedule { border-radius: var(--r); background: var(--surface-2); border: 1px solid var(--line); padding: 4px 18px; }
.cm-schedule-row { display: flex; justify-content: space-between; gap: 16px; padding: 11px 0; font-size: 14.5px; }
.cm-schedule-row + .cm-schedule-row { border-top: 1px solid var(--line); }
.cm-sched-label { color: var(--text-3); }
.cm-sched-val { font-weight: 600; text-align: right; }
.cm-hocphi { display: flex; justify-content: space-between; align-items: baseline; padding: 20px 2px; }
.cm-hocphi-label { color: var(--text-2); }
.cm-hocphi-val { font: 800 32px/1 var(--display); letter-spacing: -.03em; color: var(--teal); }
.cm-features h4, .cm-form-header h4 { font-size: 20px; font-weight: 800; margin-bottom: 10px; }
.cm-features li { display: flex; gap: 12px; padding: 6px 0; font-size: 14.5px; color: var(--text-2); }
.cm-check { flex: 0 0 auto; color: var(--teal); font-weight: 700; }
.cm-form-wrap { margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--line); }
.cm-form-header p { color: var(--text-2); font-size: 14.5px; margin-bottom: 20px; }
.cm-field { margin-bottom: 16px; }
.cm-field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.cm-field textarea { resize: vertical; min-height: 80px; }
.cm-radio-group { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.cm-radio { position: relative; cursor: pointer; }
.cm-radio input { position: absolute; opacity: 0; }
.cm-radio-box { display: block; padding: 13px 10px; border-radius: 12px; text-align: center; font-size: 14px; font-weight: 500; background: var(--surface-2); border: 1px solid var(--line-2); transition: all .2s; }
.cm-radio input:checked + .cm-radio-box { background: var(--teal-soft); border-color: var(--teal); color: var(--teal-dark); font-weight: 600; }
.cm-radio input:focus-visible + .cm-radio-box { outline: 2px solid var(--teal); outline-offset: 2px; }
.cm-radio-icon { display: none; }
.cm-form-enterprise, #cmCommitmentsEnterprise { display: none; }
.enterprise-mode .cm-form-enterprise, .enterprise-mode #cmCommitmentsEnterprise { display: block; }
.enterprise-mode .cm-form-individual, .enterprise-mode #cmCommitments { display: none; }
.cm-commitments { margin: 8px 0 18px; padding: 16px 18px; border-radius: var(--r); background: var(--teal-soft); }
.cm-commit-item { display: flex; gap: 10px; padding: 3px 0; font-size: 14px; color: var(--text-2); }
.cm-commit-icon { color: var(--teal); font-weight: 700; }
.cm-submit-btn { width: 100%; padding: 16px; font-size: 16px; }
.cm-submit-icon { display: none; }
.cm-submit-note { margin-top: 12px; font-size: 13px; color: var(--text-3); text-align: center; }
.cm-form-success { display: none; padding: 28px 0 8px; text-align: center; }
.cm-form-success.show { display: block; }
.cm-form-success-icon { width: 56px; height: 56px; display: grid; place-items: center; margin: 0 auto 16px; border-radius: 50%; background: var(--teal-soft); color: var(--teal); font-size: 22px; font-weight: 800; }
.cm-form-success h4 { font-size: 26px; margin-bottom: 8px; }
.cm-form-success p { color: var(--text-2); }

/* ─── THANH LIÊN HỆ NHANH (mobile) ─────────────────────────── */
body.rd #rtStickyBar { gap: 8px; padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); background: rgba(255,255,255,.94); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-top: 1px solid var(--line); box-shadow: 0 -8px 24px -12px rgba(15,30,35,.18); }
body.rd #rtStickyBar .rtsb-call, body.rd #rtStickyBar .rtsb-zalo, body.rd #rtStickyBar .rtsb-reg { height: 48px; border-radius: 999px; box-shadow: none; font-weight: 600; }
body.rd #rtStickyBar .rtsb-call { width: 48px; background: #fff; color: var(--teal); border: 1px solid var(--line-2); }
body.rd #rtStickyBar .rtsb-zalo { background: #fff; color: var(--text); border: 1px solid var(--line-2); }
body.rd #rtStickyBar .rtsb-reg { background: var(--teal); color: #fff; border: 0; }
body.rd.rtsb-on { padding-bottom: 72px; }

/* ═══ RESPONSIVE ═══════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13.5px; }
  .portfolio-projects-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 960px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 899; margin: 0;
    flex-direction: column; gap: 0; padding: 8px var(--gutter) 24px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    transform: translateY(-120%); visibility: hidden; transition: transform .3s ease, visibility .3s;
  }
  .nav-links.open, .nav-links.is-open { transform: none; visibility: visible; }
  .nav-links a { display: block; padding: 15px 0; font-size: 17px; color: var(--text); border-bottom: 1px solid var(--line); }
  .nav-actions { margin-left: auto; }
  .nav-backdrop.open, .nav-backdrop.is-open { display: block; position: fixed; inset: var(--nav-h) 0 0 0; z-index: 898; background: rgba(10,25,28,.3); }

  .hero-inner { padding-top: calc(var(--nav-h) + 48px); }
  .hero-thumbs { display: none; }
  .hero-bar { grid-template-columns: 1fr 1fr; }
  .hero-bar > div:nth-child(3) { border-left: 0; }
  .hero-bar > div:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,.15); }
  .hero-bg::after { background: linear-gradient(180deg, rgba(4,22,22,.55) 0%, rgba(4,22,22,.72) 40%, rgba(4,22,22,.92) 100%); }
  :where(body, main) > section:where(:not(#hero)) { padding-top: 88px; padding-bottom: 88px; }
  section > div:has(> .section-tag) { margin-bottom: 44px; }

  .courses-grid { grid-template-columns: 1fr; }
  .course-card--featured { grid-template-columns: 1fr; grid-template-rows: none; }
  .course-card--featured .card-photo { grid-row: auto; min-height: 0; aspect-ratio: 16 / 10; }
  .course-card--featured > :not(.card-photo) { grid-column: 1; padding-left: 24px; padding-right: 24px; }
  .card-header, .card-body, .course-card .card-pricing, .card-footer { padding-left: 24px; padding-right: 24px; }
  .course-card--featured .card-header { padding-top: 16px; }
  .course-card--featured .card-name { font-size: 34px; }

  .founder-card { grid-template-columns: 1fr; padding: 12px 12px 28px; }
  .founder-avatar { grid-row: auto; }
  .founder-avatar img { aspect-ratio: 1 / 1; }
  .founder-card > :not(.founder-avatar) { padding: 0 12px; }
  .founder-name { margin-top: 24px; }
  .classroom-gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: 190px; }
  .cl-photo:first-child { grid-column: span 2; grid-row: auto; }
  .alumni-grid { grid-template-columns: 1fr 1fr; }

  .roadmap { grid-template-columns: 1fr; gap: 20px; }
  .roadmap::before { left: 27px; right: auto; top: 28px; bottom: 28px; width: 2px; height: auto; background: linear-gradient(180deg, var(--teal) 0%, var(--teal) 45%, var(--line-2) 55%); }
  .rm-step { display: grid; grid-template-columns: 56px 1fr; gap: 18px; }
  .rm-node { margin: 0; }
  .rm-card { height: auto; }
  .rm-branch { flex-direction: column; gap: 6px; }

  .du-an-stats { grid-template-columns: 1fr 1fr; }
  .portfolio-tabs { width: 100%; border-radius: var(--r); }
  .portfolio-tab { flex: 1; justify-content: center; border-radius: 12px; }
  .portfolio-projects-grid { grid-template-columns: 1fr 1fr; }
  .bim-gallery { grid-template-columns: 1fr 1fr; }
  .bim-shot img { height: 170px; }

  #lien-he { grid-template-columns: 1fr; }
  .lh-form-card { grid-column: 1; grid-row: auto; margin-bottom: 28px; }

  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-legal-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  #floatGroup { display: none; } /* mobile đã có thanh liên hệ nhanh */
}

@media (max-width: 560px) {
  :root { --gutter: 16px; --nav-h: 64px; }
  .nav-cta { display: none; }
  #mainNav .logo img { height: 36px; }
  .hero-sub { font-size: 17px; }
  .hero-title { font-size: clamp(40px, 11vw, 52px); }
  .hero-btns .btn-primary, .hero-btns .btn-secondary { width: 100%; }
  .hero-strip { margin-top: 12px; margin-bottom: 16px; }
  .hero-bar { margin-bottom: 20px; border-radius: 16px; }
  .hero-bar > div { padding: 14px 16px; }
  .hero-bar b { font-size: 22px; }
  .hero-bar span { font-size: 12.5px; }
  .clients { gap: 14px; }
  .clients ul { gap: 10px 24px; }
  .clients li { font-size: 16px; }
  .alumni-grid { grid-template-columns: 1fr; }
  .classroom-gallery { grid-auto-rows: 140px; gap: 10px; }
  .cl-caption { font-size: 12px; left: 10px; bottom: 8px; }
  .cl-cta-row { padding: 22px; }
  .cl-quote { font-size: 18px; }
  .portfolio-tab { padding: 10px 8px; }
  .portfolio-tab-flag { display: none; }
  .portfolio-projects-grid { grid-template-columns: 1fr; }
  .bim-gallery { grid-template-columns: 1fr; }
  .bim-shot img { height: 200px; }
  .du-an-cta { padding: 24px; }
  .du-an-cta p { font-size: 20px; }
  .faq-q { padding: 18px 18px; font-size: 16.5px; }
  .faq-a-inner { padding: 0 18px; }
  .faq-a-inner p { margin-right: 0; }
  .lh-form-card, .privacy-modal-content { padding: 26px 20px; }
  .lh-row { flex-direction: column; gap: 0; }
  .contact-cards { grid-template-columns: 1fr; }
  .cm-header { padding: 28px 22px 22px; }
  .cm-body { padding: 22px; }
  .cm-field-row { grid-template-columns: 1fr; gap: 0; }
  .cm-radio-group { grid-template-columns: 1fr; }
  .course-modal-overlay { padding: 0; }
  .course-modal { border-radius: 0; }
  .cookie-banner { left: 12px; right: 12px; bottom: 12px; max-width: none; }
  .footer-inner { grid-template-columns: 1fr; }
}