/* Trang giới thiệu – Biệt thự Công viên Sài Đồng (EMIR). Cùng hệ màu / chữ với tour 360 (viewer/viewer.css).
   Nhẹ: không thư viện, ảnh dưới màn hình đầu tải lười, hiệu ứng chỉ đổi opacity / transform. */
:root {
  --plum-950: #1f021d;
  --plum-900: #2a0427;
  --plum-800: #340631;
  --plum-700: #421743;
  --plum-600: #551a52;
  --gold: #cfad68;
  --gold-light: #e9d29b;
  --gold-pale: #f6ebcf;
  --gold-dark: #a8843f;
  --cream: #faf5ec;
  --cream-2: #f3ead8;
  --ink: #2a0427;
  --ink-2: #5b3a57;
  --muted: #8a7186;
  --line: rgba(42, 4, 39, .12);
  --gold-grad: linear-gradient(135deg, #f1dca6 0%, #cfad68 48%, #b28c47 100%);
  --serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --font: "Montserrat", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --shadow: 0 18px 44px rgba(42, 4, 39, .16);
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--cream); color: var(--ink); font-family: var(--font); font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; }
svg { width: 20px; height: 20px; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
svg.fill { fill: currentColor; stroke-width: 1.2; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; margin: 0; line-height: 1.12; }
.wrap { width: min(1200px, 100%); margin: 0 auto; padding: 0 28px; }

/* ---------- Nút ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 12px 22px; border-radius: 999px;
  font: 600 14.5px/1.2 var(--font); letter-spacing: .2px; text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, filter .15s ease, background .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-gold { background: var(--gold-grad); color: var(--plum-900); box-shadow: 0 10px 26px rgba(207, 173, 104, .35); }
.btn-gold:hover { filter: brightness(1.06); }
.btn-ghost { color: var(--gold-light); border-color: var(--gold); background: rgba(31, 2, 29, .3); }
.btn-ghost:hover { background: rgba(207, 173, 104, .16); }
.btn-outline { color: var(--plum-700); border-color: var(--gold); background: transparent; }
.btn-outline:hover { background: var(--gold-pale); }
.btn-lg { padding: 16px 28px; font-size: 15.5px; }
.btn-lg svg { width: 22px; height: 22px; }
.link-arrow { display: inline-flex; align-items: center; gap: 8px; margin-top: 8px; font-weight: 600; color: var(--plum-600); text-decoration: none; border-bottom: 1px solid var(--gold); padding-bottom: 3px; }
.link-arrow svg { width: 18px; height: 18px; transition: transform .2s ease; }
.link-arrow:hover svg { transform: translateX(4px); }
.link-arrow.light { color: var(--gold-light); }

/* ---------- Thanh điều hướng ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50; height: 76px; display: flex; align-items: center; gap: 28px;
  padding: 0 max(28px, calc((100vw - 1200px) / 2 + 28px)); color: #fff; transition: background .3s ease, box-shadow .3s ease, height .3s ease;
}
.nav.scrolled { background: rgba(31, 2, 29, .96); box-shadow: 0 8px 26px rgba(20, 2, 18, .3); height: 66px; }
.nav-logo img { height: 46px; width: auto; transition: height .3s ease; }
.nav.scrolled .nav-logo img { height: 40px; }
.nav-links { display: flex; gap: 26px; margin-left: auto; }
.nav-links a { font-size: 12.5px; font-weight: 600; letter-spacing: 1.4px; text-transform: uppercase; text-decoration: none; color: rgba(255, 255, 255, .86); padding: 6px 0; border-bottom: 1px solid transparent; transition: color .15s, border-color .15s; }
.nav-links a:hover { color: var(--gold-light); border-color: var(--gold); }
.nav-cta { padding: 10px 18px; font-size: 13.5px; }
.nav-cta svg { width: 18px; height: 18px; }
.nav-call { display: none; width: 44px; height: 44px; border-radius: 50%; background: var(--gold-grad); color: var(--plum-900); place-items: center; margin-left: auto; }

/* ---------- Mở đầu ---------- */
.hero { position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: flex-end; overflow: hidden; background: var(--plum-950); color: #fff; }
.hero-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; animation: heroZoom 18s ease-out both; }
@keyframes heroZoom { from { transform: scale(1.08); } to { transform: none; } }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(100deg, rgba(31, 2, 29, .9) 0%, rgba(31, 2, 29, .72) 34%, rgba(31, 2, 29, .18) 66%, rgba(31, 2, 29, .05) 100%), linear-gradient(0deg, rgba(31, 2, 29, .65) 0%, rgba(31, 2, 29, 0) 40%); }
.hero-inner { position: relative; padding-top: 140px; padding-bottom: 150px; }
.kick { display: flex; align-items: center; gap: 12px; margin: 0 0 18px; font-size: 12px; font-weight: 700; letter-spacing: 2.8px; text-transform: uppercase; color: var(--gold); }
.kick::before { content: ""; width: 44px; height: 1.5px; background: var(--gold); }
.hero h1 { font-size: clamp(54px, 8.4vw, 104px); line-height: .98; letter-spacing: -.5px; }
.hero-sub { margin: 18px 0 10px; font-size: clamp(15px, 1.6vw, 18px); font-weight: 600; color: var(--gold-light); letter-spacing: .3px; }
.hero-lead { margin: 0 0 30px; max-width: 540px; font-size: 16px; line-height: 1.75; color: rgba(255, 255, 255, .84); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-note { display: flex; align-items: center; gap: 8px; margin: 22px 0 0; font-size: 13.5px; color: rgba(255, 255, 255, .7); }
.hero-note svg { width: 17px; height: 17px; color: var(--gold); }
.scroll-cue { position: absolute; left: 50%; bottom: 82px; width: 26px; height: 42px; margin-left: -13px; border: 1.5px solid rgba(233, 210, 155, .7); border-radius: 14px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--gold); animation: cue 1.8s ease-in-out infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(14px); opacity: 0; } 100% { opacity: 0; } }

.facts {
  position: relative; z-index: 2; margin-top: -58px; width: min(1200px, calc(100% - 56px)); display: grid; grid-template-columns: repeat(4, 1fr);
  background: #fff; border-radius: 18px; box-shadow: var(--shadow); padding: 0; overflow: hidden; border: 1px solid rgba(207, 173, 104, .35);
}
.facts > div { padding: 22px 26px; }
.facts > div + div:not(:nth-child(2)) { border-left: 1px solid rgba(207, 173, 104, .35); }
.facts small { display: block; font-size: 11px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; color: var(--gold-dark); }
.facts b { display: block; margin-top: 5px; font-family: var(--serif); font-size: 19px; font-weight: 600; color: var(--plum-800); line-height: 1.3; }
/* Dải diện tích: 3 con số lớn trên nền kem, chiếm cả hàng đầu thẻ */
.facts > .facts-area {
  grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); padding: 0;
  background: linear-gradient(180deg, var(--cream) 0%, #fff 100%); border-bottom: 1px solid rgba(207, 173, 104, .35);
}
.facts-area div { padding: 24px 26px 20px; text-align: center; }
.facts-area div + div { border-left: 1px solid rgba(207, 173, 104, .35); }
.facts-area b { margin: 0 0 6px; font-size: 34px; font-weight: 700; line-height: 1.1; letter-spacing: -.3px; }
.facts-area b span { margin-left: 5px; font-family: var(--font); font-size: 15px; font-weight: 600; letter-spacing: 0; color: var(--gold-dark); }
.facts-area small { letter-spacing: 1.4px; color: var(--ink-2); }

/* ---------- Khung các mục ---------- */
.section { padding: 112px 0; }
.section-cream { background: var(--cream-2); }
.section-blush { background: linear-gradient(180deg, #f6eef2 0%, #efe3ea 100%); border-block: 1px solid rgba(85, 26, 82, .08); }
.section-plum { background: radial-gradient(circle at 15% 0%, var(--plum-700), var(--plum-900) 55%, var(--plum-950)); color: #fff; }
.eyebrow { display: flex; align-items: center; gap: 12px; margin: 0 0 14px; font-size: 11.5px; font-weight: 700; letter-spacing: 2.4px; text-transform: uppercase; color: var(--gold-dark); }
.eyebrow::before { content: ""; width: 34px; height: 1.5px; background: currentColor; }
.eyebrow.gold { color: var(--gold); }
.section h2 { font-size: clamp(32px, 4.2vw, 48px); color: var(--plum-800); margin-bottom: 18px; }
.section-plum h2 { color: #fff; }
.lead { margin: 0 0 24px; font-size: 16.5px; line-height: 1.8; color: var(--ink-2); max-width: 560px; }
.section-plum .lead { color: rgba(255, 255, 255, .78); }
.head { text-align: center; margin-bottom: 50px; }
.head .eyebrow { justify-content: center; }
.head .lead { margin: 0 auto; max-width: 640px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.checks { list-style: none; margin: 0 0 26px; padding: 0; display: grid; gap: 12px; }
.checks li { display: flex; gap: 12px; font-size: 15.5px; line-height: 1.5; }
.checks li::before { content: ""; flex: 0 0 auto; width: 20px; height: 20px; margin-top: 1px; border-radius: 50%; background: var(--gold-pale) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 12.5l4 4 8-9' fill='none' stroke='%23551a52' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 12px no-repeat; border: 1px solid rgba(207, 173, 104, .6); }
.note { font-size: 14px; color: var(--muted); font-style: italic; margin: 0 0 18px; }

/* ảnh có nhãn 360 */
.shot { position: relative; display: block; overflow: hidden; border-radius: 14px; background: var(--plum-700); }
.shot img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
a:hover .shot img, a.shot:hover img { transform: scale(1.05); }
.tag360 { position: absolute; left: 14px; top: 14px; padding: 4px 10px; border-radius: 999px; background: rgba(31, 2, 29, .78); color: var(--gold-light); font-size: 12px; font-weight: 700; letter-spacing: .6px; border: 1px solid rgba(207, 173, 104, .6); }

/* ---------- Tổng quan: cụm ảnh ---------- */
.collage { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); grid-template-rows: auto auto; }
.collage .c1 { grid-column: 1 / 6; aspect-ratio: 16 / 10; box-shadow: var(--shadow); }
.collage .c2 { grid-column: 3 / 7; margin-top: -24%; aspect-ratio: 16 / 10; border: 6px solid var(--cream); box-shadow: var(--shadow); }
.c-note { position: absolute; left: 0; bottom: 6%; width: 38%; padding: 16px 18px; border-radius: 14px; background: var(--plum-900); color: #fff; box-shadow: var(--shadow); }
.c-note b { display: block; font-family: var(--serif); font-size: 18px; font-weight: 600; line-height: 1.3; color: var(--gold-light); }
.c-note span { display: block; margin-top: 4px; font-size: 13px; color: rgba(255, 255, 255, .75); line-height: 1.5; }

/* ---------- Không gian: lưới thẻ ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px 24px; }
/* 2 thẻ lớn ở hàng đầu (mỗi thẻ 2 cột), 8 thẻ còn lại 2 hàng × 4 */
.card.feature { grid-column: span 2; }
.card.feature b { font-size: 26px; }
.card.feature > span:last-child { font-size: 15.5px; }
.card { display: flex; flex-direction: column; text-decoration: none; color: var(--ink); }
.card .shot { aspect-ratio: 16 / 10; box-shadow: 0 10px 26px rgba(42, 4, 39, .12); margin-bottom: 14px; }
.card .view { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; gap: 8px; font-weight: 700; font-size: 14px; color: #fff; background: rgba(31, 2, 29, .45); opacity: 0; transition: opacity .25s ease; }
.card .view svg { width: 26px; height: 26px; color: var(--gold-light); }
.card:hover .view { opacity: 1; }
.card small { font-size: 11px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase; color: var(--gold-dark); }
.card b { margin: 3px 0 4px; font-family: var(--serif); font-size: 22px; font-weight: 600; color: var(--plum-800); line-height: 1.25; }
.card > span:last-child { font-size: 14.5px; line-height: 1.6; color: var(--ink-2); }

/* ---------- Tour 360 nhúng ---------- */
.split-tour { grid-template-columns: 5fr 7fr; gap: 56px; }
.feats { list-style: none; margin: 0 0 30px; padding: 0; display: grid; gap: 14px; }
.feats li { display: flex; align-items: center; gap: 14px; font-size: 15px; color: rgba(255, 255, 255, .86); }
.feats i { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: rgba(207, 173, 104, .14); border: 1px solid rgba(207, 173, 104, .4); color: var(--gold); flex: 0 0 auto; }
.row-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.embed { position: relative; aspect-ratio: 16 / 10; border-radius: 20px; overflow: hidden; background: var(--plum-950); box-shadow: 0 30px 70px rgba(10, 0, 9, .55); border: 1px solid rgba(207, 173, 104, .45); }
.embed img { width: 100%; height: 100%; object-fit: cover; }
.embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.embed-play {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  border: 0; cursor: pointer; color: #fff; font: inherit; background: linear-gradient(0deg, rgba(31, 2, 29, .7), rgba(31, 2, 29, .15));
}
.embed-play .ring { position: relative; width: 84px; height: 84px; border-radius: 50%; display: grid; place-items: center; background: var(--gold-grad); color: var(--plum-900); box-shadow: 0 12px 30px rgba(0, 0, 0, .35); transition: transform .2s ease; }
.embed-play .ring::after { content: ""; position: absolute; inset: -10px; border-radius: 50%; border: 2px solid rgba(233, 210, 155, .8); animation: pulse 2.2s ease-out infinite; }
.embed-play .ring svg { width: 34px; height: 34px; margin-left: 4px; }
.embed-play:hover .ring { transform: scale(1.06); }
.embed-play b { font-family: var(--serif); font-size: 24px; font-weight: 600; margin-top: 8px; text-shadow: 0 2px 12px rgba(0, 0, 0, .5); }
.embed-play small { font-size: 13px; color: rgba(255, 255, 255, .8); }
@keyframes pulse { 0% { transform: scale(1); opacity: .9; } 100% { transform: scale(1.4); opacity: 0; } }

/* ---------- Các tầng ---------- */
.stack { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.stack li { display: flex; align-items: center; gap: 18px; padding: 14px 16px 14px 14px; border-radius: 14px; background: #fff; border: 1px solid var(--line); box-shadow: 0 6px 16px rgba(42, 4, 39, .05); transition: border-color .15s, transform .15s; }
.stack li:hover { border-color: var(--gold); transform: translateX(4px); }
.stack .lv { width: 48px; height: 48px; flex: 0 0 auto; border-radius: 12px; display: grid; place-items: center; font-family: var(--serif); font-size: 20px; font-weight: 600; background: linear-gradient(135deg, var(--plum-700), var(--plum-900)); color: var(--gold-light); }
.stack .lv svg { color: var(--gold-light); width: 22px; height: 22px; }
.stack div { flex: 1; min-width: 0; }
.stack b { display: block; font-size: 16px; color: var(--plum-800); }
.stack small { display: block; font-size: 13.5px; color: var(--ink-2); line-height: 1.5; }
.stack a { flex: 0 0 auto; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--gold); font-size: 12.5px; font-weight: 700; color: var(--plum-700); text-decoration: none; }
.stack a:hover { background: var(--gold-pale); }
.stack li.ground { background: var(--gold-pale); border-color: rgba(207, 173, 104, .6); }

/* ---------- Vị trí ---------- */
.map { aspect-ratio: 4 / 3; border-radius: 18px; overflow: hidden; box-shadow: var(--shadow); border: 6px solid #fff; background: var(--cream-2); }
.map iframe { width: 100%; height: 100%; border: 0; display: block; }

/* ---------- Về EMIR ---------- */
.about-inner { text-align: center; max-width: 860px; }
.about-mark { width: 60px; height: auto; margin: 0 auto 22px; }
.about .eyebrow { justify-content: center; }
.about .lead { margin: 0 auto 34px; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 30px; }
.principles div { padding: 22px 18px; border-radius: 16px; border: 1px solid rgba(207, 173, 104, .4); background: rgba(255, 255, 255, .04); }
.principles svg { width: 30px; height: 30px; color: var(--gold); margin: 0 auto 10px; display: block; }
.principles b { font-family: var(--serif); font-size: 18px; font-weight: 600; color: #fff; }

/* ---------- Liên hệ ---------- */
.contact { background: var(--cream); }
.contact-card { display: grid; grid-template-columns: 1fr 1fr; gap: 0; padding: 0; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow); width: min(1144px, calc(100% - 56px)); }
.c-left { padding: 52px 48px; background: radial-gradient(circle at 0% 0%, var(--plum-700), var(--plum-900) 60%); color: #fff; }
.c-left h2 { color: #fff; font-size: clamp(30px, 3.4vw, 40px); }
.c-left p { color: rgba(255, 255, 255, .8); margin: 0 0 26px; }
.hotline { display: inline-flex; align-items: center; gap: 14px; padding: 12px 22px 12px 12px; border-radius: 18px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(207, 173, 104, .5); text-decoration: none; color: #fff; transition: background .15s; }
.hotline:hover { background: rgba(207, 173, 104, .14); }
.hotline svg { width: 50px; height: 50px; padding: 13px; border-radius: 14px; background: var(--gold-grad); color: var(--plum-900); }
.hotline small { display: block; font-size: 12px; color: var(--gold-light); }
.hotline b { display: block; font-size: 26px; letter-spacing: .6px; }
.c-alt { margin-top: 18px !important; font-size: 14px; }
.c-alt a { color: var(--gold-light); }
.c-form { padding: 44px 44px 40px; background: #fff; display: grid; gap: 14px; align-content: start; }
.c-form h3 { font-size: 26px; color: var(--plum-800); margin-bottom: 4px; }
.c-form label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.c-form input, .c-form textarea { font: 15px var(--font); color: var(--ink); padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--cream); outline: none; transition: border-color .15s, box-shadow .15s; resize: vertical; }
.c-form input:focus, .c-form textarea:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(207, 173, 104, .2); }
.c-form .invalid { border-color: #c0392b; }
.c-form .btn { margin-top: 6px; justify-self: start; }
.form-hint { margin: 0; font-size: 12.5px; color: var(--muted); }
.form-hint.err { color: #b0302a; }

/* ---------- Chân trang ---------- */
.footer { background: var(--plum-950); color: rgba(255, 255, 255, .72); padding: 64px 0 28px; font-size: 14px; }
.f-grid { display: grid; grid-template-columns: 1.2fr 1.4fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid rgba(207, 173, 104, .2); }
.f-grid img { height: 52px; width: auto; margin-bottom: 14px; }
.f-grid b { display: block; margin-bottom: 8px; color: var(--gold-light); font-size: 12px; letter-spacing: 1.6px; text-transform: uppercase; }
.f-grid p { margin: 0; line-height: 1.7; }
.f-grid a { text-decoration: none; }
.f-grid a:hover { color: var(--gold-light); }
.f-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 22px; font-size: 12.5px; }
.f-bottom a { color: var(--gold); text-decoration: none; font-weight: 600; }

.mbar { display: none; }

/* ---------- Hiện dần khi cuộn tới (chỉ khi có JS) ---------- */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s ease, transform .8s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-img { animation: none; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Màn hình vừa / nhỏ ---------- */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .nav-cta { margin-left: auto; }
  .split, .split-tour { grid-template-columns: 1fr; gap: 48px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .card.feature { grid-column: auto; }
  .card.feature b { font-size: 22px; }
  .contact-card { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  body { padding-bottom: 72px; }
  .wrap { padding: 0 18px; }
  .nav { height: 64px; padding: 0 18px; }
  .nav.scrolled { height: 58px; }
  .nav-logo img, .nav.scrolled .nav-logo img { height: 38px; }
  .nav-cta { display: none; }
  .nav-call { display: grid; }
  .hero { min-height: 92svh; }
  .hero-shade { background: linear-gradient(180deg, rgba(31, 2, 29, .35) 0%, rgba(31, 2, 29, .2) 30%, rgba(31, 2, 29, .88) 62%, rgba(31, 2, 29, .97) 100%); }
  .hero-inner { padding-top: 110px; padding-bottom: 96px; }
  .hero h1 { font-size: 52px; }
  .hero-lead { font-size: 15px; margin-bottom: 24px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-note { font-size: 12.5px; }
  .scroll-cue { display: none; }
  .facts { grid-template-columns: 1fr 1fr; margin-top: -40px; width: calc(100% - 36px); padding: 0; border-radius: 16px; }
  .facts > div { padding: 16px 16px; }
  .facts > div:nth-child(4) { border-left: 0; }
  .facts > div:nth-child(n+4) { border-top: 1px solid rgba(207, 173, 104, .35); }
  .facts b { font-size: 16px; }
  .facts-area div { padding: 18px 6px 14px; }
  .facts-area b { font-size: 24px; }
  .facts-area b span { margin-left: 3px; font-size: 12px; }
  .facts-area small { font-size: 9.5px; letter-spacing: .8px; line-height: 1.4; }
  .section { padding: 76px 0; }
  .lead { font-size: 15.5px; }
  .cards { grid-template-columns: 1fr; gap: 30px; }
  .card .view { opacity: 1; background: none; align-items: flex-end; justify-content: flex-start; padding: 12px; }
  .card .view { font-size: 0; }
  .card .view svg { width: 34px; height: 34px; padding: 6px; border-radius: 50%; background: rgba(31, 2, 29, .75); }
  .c-note { position: static; width: auto; margin-top: 14px; grid-column: 1 / -1; }
  .collage .c2 { margin-top: -18%; }
  .embed { aspect-ratio: 4 / 5; border-radius: 16px; }
  .embed-play b { font-size: 21px; }
  .principles { grid-template-columns: 1fr; }
  .contact-card { width: calc(100% - 36px); border-radius: 18px; }
  .c-left { padding: 36px 24px; }
  .c-form { padding: 30px 22px; }
  .hotline b { font-size: 22px; }
  .f-grid { grid-template-columns: 1fr; gap: 26px; }
  .stack li { gap: 12px; padding: 12px; }
  .stack .lv { width: 42px; height: 42px; font-size: 18px; }
  .mbar {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; display: grid; grid-template-columns: 1fr 1.3fr; gap: 8px;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom)); background: rgba(31, 2, 29, .97); box-shadow: 0 -8px 24px rgba(20, 2, 18, .3);
    transform: translateY(110%); transition: transform .35s ease;   /* hiện khi đã cuộn qua phần mở đầu (đã có 2 nút) */
  }
  .past-hero .mbar { transform: none; }
  .mbar a { display: flex; align-items: center; justify-content: center; gap: 8px; height: 48px; border-radius: 999px; font-weight: 700; font-size: 14.5px; text-decoration: none; color: var(--gold-light); border: 1px solid var(--gold); }
  .mbar a.gold { background: var(--gold-grad); color: var(--plum-900); border-color: transparent; }
}