/* GIAO DIỆN CHUNG — dùng cho mọi trang. Đổi màu/font ở :root là cả website đổi theo.
   Đo theo website mẫu (2026-11-03): nâu đỏ + vàng + navy, Inter / Playfair Display nghiêng / Lobster. */
:root {
  --do: oklch(0.45 0.15 30);          /* màu chính: menu, tiêu đề, nút */
  --do-dam: oklch(0.38 0.14 30);
  --do-nhat: oklch(0.45 0.15 30 / 0.06);
  --vang: #D4AF37;                     /* nút hotline, nút gọi nổi */
  --vang-nhat: oklch(0.8 0.12 85);     /* nhãn nhỏ trên nền tối */
  --navy: #1E3A8A;                     /* chân trang, hộp CTA */
  --xanh-nhat: #E0F2FE;                /* nền khối CTA có hoạ tiết sóng */
  --chu: oklch(0.2 0.02 20);
  --chu-phu: #555;
  --nen: #fff;
  --nen-2: #FAFAFA;
  --font: "Inter", system-ui, sans-serif;
  --font-tde: "Playfair Display", Georgia, serif;
  --font-h1: "Lobster", cursive;
  --rong: 1200px;
  --khoang: 96px;
  --dau-trang: 81px;
  --song: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='120' viewBox='0 0 600 120'%3E%3Cpath d='M0 60 C100 10 200 110 300 60 S500 10 600 60' fill='none' stroke='%23bae6fd' stroke-width='14' opacity='.55'/%3E%3Cpath d='M0 100 C100 50 200 150 300 100 S500 50 600 100' fill='none' stroke='%23bae6fd' stroke-width='8' opacity='.35'/%3E%3C/svg%3E");
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.6; color: var(--chu); background: var(--nen); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.2; }
p { margin: 0 0 1em; }
.khung { width: 100%; max-width: var(--rong); margin: 0 auto; padding: 0 24px; }
.khoi { padding: var(--khoang) 0; scroll-margin-top: var(--dau-trang); }
.nen-2 { background: var(--nen-2); }
.nen-song { background: var(--xanh-nhat) var(--song) repeat; background-size: 600px 120px; }
.giua { text-align: center; }
.an { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Nhãn chờ thay — chữ đỏ, viền đứt. Còn nhãn thì chưa xuất bản. */
.xac-nhan { color: #c00; border: 1px dashed #c00; padding: 0 4px; border-radius: 3px; font-style: normal; }

/* ---------- Chữ ---------- */
.nhan { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .2em; text-transform: uppercase; color: var(--do); margin-bottom: 14px; }
.nhan-vien { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; padding: 6px 16px; border-radius: 999px; background: var(--do-nhat); color: var(--do); margin-bottom: 18px; }
.tde { font-family: var(--font-tde); font-style: italic; font-weight: 700; color: var(--do); font-size: 48px; line-height: 1.2; margin-bottom: 18px; }
.tde-nho { font-size: 36px; }
.trich { font-style: italic; color: var(--chu-phu); max-width: 640px; margin: 0 auto 48px; }
.mo-ta { color: var(--chu-phu); max-width: 720px; }
.giua .mo-ta { margin-left: auto; margin-right: auto; }

/* ---------- Nút ---------- */
.nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 12px 28px; border-radius: 999px; font-weight: 700; font-size: 15px; letter-spacing: .03em; border: 2px solid transparent; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
.nut:hover { transform: translateY(-2px); }
.nut-chinh { background: var(--do); color: #fff; box-shadow: 0 10px 24px oklch(0.45 0.15 30 / .3); }
.nut-chinh:hover { background: var(--do-dam); }
.nut-vang { background: var(--vang); color: #fff; }
.nut-vien { border-color: #fff; color: #fff; }
.lien-ket-mui-ten { font-weight: 700; color: var(--do); display: inline-flex; gap: 6px; align-items: center; }
.lien-ket-mui-ten:hover { gap: 10px; }

/* ---------- Đầu trang (CHUNG) ---------- */
.dau-trang { position: sticky; top: 0; z-index: 50; height: var(--dau-trang); background: rgba(255,255,255,.8); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid rgba(0,0,0,.05); }
.dau-trang .khung { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--do); letter-spacing: .02em; }
.logo-hinh { width: 48px; height: 48px; border-radius: 8px; background: var(--do); color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 800; }
.logo span:last-child { color: var(--navy); }
.menu { display: flex; gap: 36px; list-style: none; margin: 0; padding: 0; }
.menu a { font-size: 14px; font-weight: 600; color: var(--chu); position: relative; padding: 6px 0; }
.menu a:hover, .menu a[aria-current="page"] { color: var(--do); }
.menu a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--do); border-radius: 2px; }
.dau-trang .nut-vang { min-height: 44px; padding: 10px 20px; font-size: 16px; }
.nut-menu { display: none; width: 44px; height: 44px; border: 0; background: none; cursor: pointer; padding: 10px; }
.nut-menu span { display: block; height: 2px; background: var(--do); margin: 6px 0; border-radius: 2px; transition: .25s; }

/* ---------- Banner trang chủ ---------- */
.banner { position: relative; min-height: calc(100vh - var(--dau-trang)); max-height: 820px; display: flex; align-items: center; color: #fff; overflow: hidden; }
.banner-anh { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.banner::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, rgba(10,6,4,.85) 0%, rgba(10,6,4,.55) 50%, rgba(10,6,4,.15) 100%); }
.banner .khung { position: relative; z-index: 2; }
.banner-noi-dung { max-width: 760px; }
.banner .nhan-vien { background: oklch(0.8 0.12 85 / .2); color: var(--vang-nhat); border: 1px solid oklch(0.8 0.12 85 / .4); }
.banner h1 { font-family: var(--font-h1); font-weight: 400; font-size: 96px; line-height: 1.25; margin-bottom: 8px; text-shadow: 0 4px 20px rgba(0,0,0,.3); }
.banner h1 em { display: block; font-family: var(--font-tde); font-style: italic; font-weight: 700; font-size: 60px; color: var(--vang-nhat); }
.banner p { font-size: 20px; line-height: 1.6; color: rgba(255,255,255,.8); max-width: 576px; margin: 20px 0 36px; }

/* ---------- Banner trang con ---------- */
.banner-con { position: relative; padding: 120px 0 100px; color: #fff; text-align: center; overflow: hidden; }
.banner-con .banner-anh { position: absolute; inset: 0; }
.banner-con::before { content: ""; position: absolute; inset: 0; z-index: 1; background: rgba(10,6,4,.6); }
.banner-con .khung { position: relative; z-index: 2; }
.banner-con h1 { font-family: var(--font-tde); font-style: italic; font-weight: 700; font-size: 56px; line-height: 1.2; max-width: 860px; margin: 0 auto 16px; }
.banner-con p { color: rgba(255,255,255,.85); font-size: 18px; max-width: 640px; margin: 0 auto; }
.banner-con .nhan-vien { background: oklch(0.8 0.12 85 / .2); color: var(--vang-nhat); }

/* Đường dẫn phân cấp (breadcrumb) */
.duong-dan { background: var(--nen-2); border-bottom: 1px solid #eee; font-size: 14px; }
.duong-dan ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 12px 0; }
.duong-dan li + li::before { content: "›"; margin-right: 8px; color: #aaa; }
.duong-dan a { color: var(--do); font-weight: 600; }

/* ---------- Câu chuyện (ảnh + chữ) ---------- */
.hai-cot { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.anh-bo { position: relative; }
.anh-bo img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 32px; box-shadow: 0 30px 60px rgba(0,0,0,.15); }
.the-so { position: absolute; right: -24px; bottom: -32px; background: var(--do); color: #fff; padding: 24px 32px; border-radius: 24px; box-shadow: 0 20px 40px oklch(0.45 0.15 30 / .35); text-align: center; }
.the-so b { display: block; font-size: 44px; line-height: 1; font-weight: 800; }
.the-so small { display: block; font-size: 13px; letter-spacing: .15em; text-transform: uppercase; margin-top: 8px; opacity: .9; }

/* ---------- Thẻ sản phẩm ---------- */
.luoi-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.luoi-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.the-sp { background: #fff; border-radius: 40px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.06); border: 1px solid #f1eeee; transition: transform .3s, box-shadow .3s; display: flex; flex-direction: column; }
.the-sp:hover { transform: translateY(-6px); box-shadow: 0 24px 48px rgba(0,0,0,.1); }
.the-sp-anh { position: relative; aspect-ratio: 4/5; overflow: hidden; }
.the-sp-anh img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.the-sp:hover .the-sp-anh img { transform: scale(1.05); }
.the-sp-nhan { position: absolute; top: 20px; left: 20px; background: var(--do); color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .08em; padding: 6px 12px; border-radius: 999px; }
.the-sp-chu { padding: 24px 24px 28px; text-align: center; flex: 1; display: flex; flex-direction: column; }
.the-sp-chu h3, .the-sp-chu h4 { font-family: var(--font-tde); font-size: 22px; color: var(--do); margin-bottom: 8px; }
.the-sp-chu p { color: var(--chu-phu); font-size: 14px; margin-bottom: 16px; }
.the-sp-chu .nut { margin-top: auto; min-height: 44px; padding: 10px 20px; font-size: 14px; }
.luoi-4 .the-sp { border-radius: 28px; }
.luoi-4 .the-sp-anh { aspect-ratio: 1/1; }
.luoi-4 .the-sp-chu h3 { font-size: 19px; }

/* ---------- Thẻ lý do (ảnh + icon) ---------- */
.the-ly-do { background: #fff; border-radius: 32px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.06); }
.the-ly-do-anh { position: relative; aspect-ratio: 16/11; }
.the-ly-do-anh img { width: 100%; height: 100%; object-fit: cover; }
.the-ly-do-anh span { position: absolute; left: 16px; bottom: 16px; background: rgba(0,0,0,.55); color: #fff; font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 999px; }
.the-ly-do-chu { padding: 28px; }
.the-ly-do-chu .icon { width: 48px; height: 48px; border-radius: 50%; background: var(--do-nhat); color: var(--do); display: inline-grid; place-items: center; margin-bottom: 16px; }
.the-ly-do-chu h3 { font-family: var(--font-tde); font-style: italic; font-size: 24px; color: var(--do); margin-bottom: 10px; }
.the-ly-do-chu p { color: var(--chu-phu); font-size: 15px; margin: 0; }
.icon svg { width: 24px; height: 24px; }

/* ---------- Hộp CTA navy ---------- */
.hop-cta { background: var(--navy); color: #fff; border-radius: 48px; padding: 72px 48px; text-align: center; position: relative; overflow: hidden; box-shadow: 0 30px 60px rgba(30,58,138,.3); }
.hop-cta::before { content: ""; position: absolute; top: -96px; right: -96px; width: 288px; height: 288px; border-radius: 50%; background: rgba(255,255,255,.06); animation: nhip 2s ease-in-out infinite; }
.hop-cta h2 { font-family: var(--font-tde); font-style: italic; font-size: 44px; margin-bottom: 16px; }
.hop-cta p { color: rgba(255,255,255,.8); max-width: 600px; margin: 0 auto 32px; }
.hop-cta .cac-nut { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Giới thiệu: 3 giá trị, dòng thời gian, thư viện ---------- */
.the-gia-tri { background: #fff; border-radius: 28px; padding: 36px 28px; box-shadow: 0 10px 30px rgba(0,0,0,.06); text-align: center; border-top: 4px solid var(--do); }
.the-gia-tri .icon { width: 56px; height: 56px; border-radius: 50%; background: var(--do); color: #fff; display: inline-grid; place-items: center; margin-bottom: 18px; }
.the-gia-tri h3 { font-family: var(--font-tde); font-style: italic; color: var(--do); font-size: 24px; margin-bottom: 10px; }
.the-gia-tri p { color: var(--chu-phu); margin: 0; }
.dong-tg { position: relative; max-width: 900px; margin: 0 auto; }
.dong-tg::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: oklch(0.45 0.15 30 / .25); transform: translateX(-50%); }
.moc { position: relative; width: 50%; padding: 0 48px 48px; }
.moc:nth-child(odd) { text-align: right; }
.moc:nth-child(even) { margin-left: 50%; }
.moc::before { content: ""; position: absolute; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--vang); border: 4px solid #fff; box-shadow: 0 0 0 2px var(--do); }
.moc:nth-child(odd)::before { right: -8px; }
.moc:nth-child(even)::before { left: -8px; }
.moc b { font-family: var(--font-tde); font-size: 32px; color: var(--do); display: block; line-height: 1.1; }
.moc h3 { font-size: 18px; margin: 6px 0; }
.moc p { color: var(--chu-phu); margin: 0; font-size: 15px; }
.thu-vien { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.thu-vien img { width: 100%; aspect-ratio: 1/1; object-fit: cover; border-radius: 20px; }
.thu-vien img:first-child { grid-column: span 2; grid-row: span 2; }
.trich-lon { font-family: var(--font-tde); font-style: italic; font-size: 34px; line-height: 1.35; color: var(--do); margin-bottom: 24px; }

/* ---------- Quy trình: bước so le ---------- */
.ba-diem { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.buoc-ds { position: relative; max-width: 1000px; margin: 0 auto; }
.buoc-ds::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: repeating-linear-gradient(to bottom, oklch(0.45 0.15 30 / .35) 0 8px, transparent 8px 16px); transform: translateX(-50%); }
.buoc { position: relative; width: calc(50% - 40px); background: #fff; border-radius: 28px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.08); margin-bottom: 48px; }
.buoc:nth-child(even) { margin-left: calc(50% + 40px); }
.buoc img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.buoc-chu { padding: 24px 28px 28px; }
.buoc-chu h3 { display: flex; align-items: center; gap: 12px; font-family: var(--font-tde); font-style: italic; color: var(--do); font-size: 22px; margin-bottom: 8px; }
.buoc-so { flex: none; width: 36px; height: 36px; border-radius: 50%; background: var(--do); color: #fff; font-family: var(--font); font-style: normal; font-size: 15px; display: grid; place-items: center; }
.buoc-chu p { color: var(--chu-phu); margin: 0; font-size: 15px; }

/* ---------- Liên hệ ---------- */
.the-lh { background: #fff; border-radius: 28px; padding: 36px 28px; box-shadow: 0 10px 30px rgba(0,0,0,.06); text-align: center; }
.the-lh .icon { width: 64px; height: 64px; border-radius: 50%; background: var(--do-nhat); color: var(--do); display: inline-grid; place-items: center; margin-bottom: 18px; }
.the-lh .icon svg { width: 28px; height: 28px; }
.the-lh h3 { font-family: var(--font-tde); font-style: italic; color: var(--do); font-size: 24px; margin-bottom: 10px; }
.the-lh p { color: var(--chu-phu); }
.the-lh .nut { min-height: 44px; padding: 10px 20px; font-size: 14px; margin: 4px; }
.ban-do { border-radius: 32px; overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,.08); aspect-ratio: 21/9; background: #e5e7eb; display: grid; place-items: center; color: var(--chu-phu); text-align: center; padding: 24px; }
.ban-do iframe { width: 100%; height: 100%; border: 0; }

/* ---------- Trang / bài viết soạn trong WordPress (theme) ---------- */
.banner-con-don { background: linear-gradient(135deg, var(--do-dam), var(--do)); padding: 88px 0 72px; }
.banner-con-don::before { display: none; }
.noi-dung { max-width: 820px; font-size: 17px; line-height: 1.75; }
.noi-dung h2 { font-family: var(--font-tde); font-style: italic; color: var(--do); font-size: 32px; margin: 1.6em 0 .6em; }
.noi-dung h3 { font-size: 22px; margin: 1.4em 0 .5em; }
.noi-dung a { color: var(--do); text-decoration: underline; }
.noi-dung img, .anh-dai-dien { border-radius: 20px; margin: 1.5em 0; }
.noi-dung ul, .noi-dung ol { padding-left: 1.4em; }
.noi-dung table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; }
.noi-dung td, .noi-dung th { border: 1px solid #e5e5e5; padding: 10px 12px; }
.ngay-dang { color: var(--chu-phu); font-size: 14px; }
.ds-bai { display: grid; gap: 28px; }
.the-bai { display: grid; grid-template-columns: 260px 1fr; gap: 24px; background: #fff; border-radius: 24px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.06); }
.the-bai img { width: 100%; height: 100%; object-fit: cover; margin: 0; border-radius: 0; }
.the-bai-chu { padding: 24px 24px 24px 0; }
.the-bai h2 { font-size: 22px; margin: 0 0 6px; }
.the-bai h2 a { text-decoration: none; }
.nav-links { display: flex; gap: 8px; margin-top: 32px; }
.nav-links .page-numbers { padding: 8px 14px; border-radius: 999px; border: 1px solid #ddd; text-decoration: none; }
.nav-links .current { background: var(--do); color: #fff; border-color: var(--do); }

/* ---------- Chân trang (CHUNG) ---------- */
.chan-trang { background: var(--navy); color: rgba(255,255,255,.75); padding: 72px 0 0; font-size: 15px; }
.chan-trang .luoi { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.6fr; gap: 40px; }
.chan-trang h3 { font-family: var(--font-tde); font-style: italic; color: #fff; font-size: 24px; margin-bottom: 16px; }
.chan-trang h4 { color: var(--vang); font-size: 13px; letter-spacing: .15em; text-transform: uppercase; margin-bottom: 18px; }
.chan-trang ul { list-style: none; margin: 0; padding: 0; }
.chan-trang li { margin-bottom: 10px; }
.chan-trang a:hover { color: #fff; }
.chan-trang .ban-quyen { border-top: 1px solid rgba(255,255,255,.12); margin-top: 48px; padding: 20px 0; text-align: center; font-size: 13px; letter-spacing: .05em; }

/* ---------- Nút gọi nổi (máy tính) + thanh CTA (điện thoại) ---------- */
.goi-noi { position: fixed; right: 24px; bottom: 24px; z-index: 60; width: 64px; height: 64px; border-radius: 50%; background: var(--vang); color: #fff; display: grid; place-items: center; box-shadow: 0 10px 25px rgba(212,175,55,.5); }
.goi-noi::before { content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--vang); animation: ping 1.4s cubic-bezier(0,0,.2,1) infinite; z-index: -1; }
.goi-noi svg { width: 28px; height: 28px; }
.thanh-cta { display: none; }

/* ---------- Chuyển động ---------- */
@keyframes truotLen { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }
@keyframes ping { 75%, 100% { transform: scale(1.7); opacity: 0; } }
@keyframes nhip { 50% { opacity: .5; } }
.truot-len { animation: truotLen 1s ease-out both; }
.hien-dan { opacity: 0; transform: translateY(30px); transition: opacity .8s ease-out, transform .8s ease-out; }
.hien-dan.da-hien { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .goi-noi::before, .hop-cta::before { animation: none; } }

/* =========================================================
   CÂN ĐỐI 2 NỀN TẢNG — máy tính bảng & điện thoại
   ========================================================= */
@media (max-width: 1024px) {
  :root { --khoang: 72px; }
  .menu { gap: 22px; }
  .banner h1 { font-size: 72px; }
  .banner h1 em { font-size: 46px; }
  .luoi-4 { grid-template-columns: repeat(3, 1fr); }
  .chan-trang .luoi { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  :root { --dau-trang: 64px; --khoang: 56px; }
  .nut-menu { display: block; }
  /* backdrop-filter biến đầu trang thành khung chứa của menu fixed → menu bị kẹt trong 64px và tràn ngang. Tắt ở điện thoại. */
  .dau-trang { backdrop-filter: none; -webkit-backdrop-filter: none; background: #fff; }
  .dau-trang .nut-vang { display: none; }
  .logo-hinh { width: 40px; height: 40px; }
  .logo { font-size: 17px; }
  .menu { position: fixed; top: var(--dau-trang); left: 0; right: 0; bottom: 0; background: #fff; flex-direction: column; gap: 0; padding: 16px 24px; transform: translateX(100%); visibility: hidden; transition: transform .3s, visibility .3s; overflow-y: auto; }
  .menu a { display: flex; align-items: center; min-height: 52px; font-size: 17px; border-bottom: 1px solid #f1f1f1; }
  .menu a[aria-current="page"]::after { display: none; }
  .mo-menu .menu { transform: none; visibility: visible; }
  .mo-menu .nut-menu span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .mo-menu .nut-menu span:nth-child(2) { opacity: 0; }
  .mo-menu .nut-menu span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  .hai-cot, .luoi-3, .ba-diem { grid-template-columns: 1fr; gap: 32px; }
  .luoi-4 { grid-template-columns: 1fr 1fr; gap: 16px; }
  .the-so { right: 12px; bottom: -24px; padding: 16px 22px; }
  .the-so b { font-size: 32px; }
  .tde { font-size: 32px; }
  .tde-nho { font-size: 28px; }
  .banner { min-height: 0; padding: 96px 0 80px; }
  .banner::before { background: linear-gradient(180deg, rgba(10,6,4,.55), rgba(10,6,4,.85)); }
  .banner h1 { font-size: 52px; }
  .banner h1 em { font-size: 34px; }
  .banner p { font-size: 17px; }
  .banner-con { padding: 80px 0 64px; }
  .banner-con h1 { font-size: 34px; }
  .trich-lon { font-size: 26px; }
  .hop-cta { border-radius: 32px; padding: 48px 22px; }
  .hop-cta h2 { font-size: 30px; }
  .dong-tg::before { left: 8px; }
  .moc, .moc:nth-child(even) { width: 100%; margin-left: 0; padding: 0 0 36px 40px; text-align: left; }
  .moc:nth-child(odd)::before, .moc:nth-child(even)::before { left: 0; right: auto; }
  .buoc-ds::before { display: none; }
  .buoc, .buoc:nth-child(even) { width: 100%; margin-left: 0; margin-bottom: 24px; }
  .thu-vien { grid-template-columns: 1fr 1fr; gap: 10px; }
  .the-bai { grid-template-columns: 1fr; }
  .the-bai-chu { padding: 0 20px 20px; }
  .noi-dung h2 { font-size: 26px; }
  .ban-do { aspect-ratio: 4/3; border-radius: 24px; }
  .chan-trang { padding-bottom: 72px; }
  .chan-trang .luoi { grid-template-columns: 1fr; gap: 28px; }
  /* điện thoại: thanh CTA dính đáy THAY cho nút gọi nổi */
  .goi-noi { display: none; }
  .thanh-cta { display: grid; grid-template-columns: repeat(3, 1fr); position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; background: #fff; box-shadow: 0 -4px 16px rgba(0,0,0,.1); padding-bottom: env(safe-area-inset-bottom); }
  .thanh-cta a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; min-height: 56px; font-size: 13px; font-weight: 700; color: #fff; }
  .thanh-cta a:nth-child(1) { background: var(--vang); }
  .thanh-cta a:nth-child(2) { background: #0068FF; }
  .thanh-cta a:nth-child(3) { background: var(--do); }
  .thanh-cta svg { width: 20px; height: 20px; }
}
@media (max-width: 400px) {
  .khung { padding: 0 16px; }
  .banner h1 { font-size: 42px; }
  .banner h1 em { font-size: 28px; }
  .luoi-4 { grid-template-columns: 1fr; }
  .the-sp-chu { padding: 20px; }
}