:root {
  --chu-dao: #009a9e;
  --chu-dao-dam: #007a7e;
  --chu-dao-nhat: #e6f6f6;
  --nhan: #ff8a3d;
  --chu: #1c2b2d;
  --chu-phu: #5b6b6d;
  --nen: #ffffff;
  --nen-phu: #f5f9f9;
  --vien: #dde8e8;
  --bo: 16px;
  --bong: 0 10px 30px rgba(0, 60, 62, .08);
  --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; font-family: var(--font); color: var(--chu); background: var(--nen); line-height: 1.65; font-size: 16px; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--chu-dao-dam); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4.6vw, 3.1rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.2rem); font-weight: 800; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }
.an { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.khung { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 16px; }
.phan { padding: clamp(56px, 8vw, 96px) 0; }
.phan-xam { background: var(--nen-phu); }
.tieu-de-phan { max-width: 720px; margin: 0 auto 44px; text-align: center; }
.tieu-de-phan p { color: var(--chu-phu); }
.nhan-phan { display: inline-block; font-weight: 700; font-size: .85rem; color: var(--chu-dao); background: var(--chu-dao-nhat); padding: 4px 12px; border-radius: 99px; margin-bottom: 12px; }

/* Nút */
.nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--chu-dao); color: #fff; font-weight: 700; text-decoration: none; padding: 13px 24px; border-radius: 99px; border: 2px solid var(--chu-dao); transition: background .15s, transform .15s; text-align: center; }
.nut:hover { background: var(--chu-dao-dam); border-color: var(--chu-dao-dam); transform: translateY(-1px); }
.nut-vien { background: transparent; color: var(--chu-dao-dam); }
.nut-vien:hover { background: var(--chu-dao-nhat); color: var(--chu-dao-dam); }
.nut-trang { background: #fff; color: var(--chu-dao-dam); border-color: #fff; }
.nut-trang:hover { background: var(--chu-dao-nhat); border-color: var(--chu-dao-nhat); }
.nut-nho { padding: 8px 18px; font-size: .92rem; }
.nhom-nut { display: flex; flex-wrap: wrap; gap: 12px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--nhan); outline-offset: 2px; }

/* Đầu trang */
.dau-trang { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .96); backdrop-filter: blur(8px); border-bottom: 1px solid var(--vien); }
.dau-trong { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.logo img { height: 34px; width: auto; }
.menu { display: flex; align-items: center; gap: 26px; }
.menu a:not(.nut) { color: var(--chu); text-decoration: none; font-weight: 600; font-size: .96rem; }
.menu a:not(.nut):hover, .menu a[aria-current] { color: var(--chu-dao); }
.nut-menu { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.nut-menu span { display: block; width: 24px; height: 2px; background: var(--chu); margin: 5px 0; transition: .2s; }
@media (max-width: 860px) {
  .nut-menu { display: block; }
  .menu { display: none; position: absolute; left: 0; right: 0; top: 100%; background: #fff; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 16px 20px; border-bottom: 1px solid var(--vien); box-shadow: var(--bong); }
  .menu a:not(.nut) { padding: 12px 0; border-bottom: 1px solid var(--vien); }
  .menu .nut { margin-top: 14px; }
  .dau-trang.mo .menu { display: flex; }
  .dau-trang.mo .nut-menu span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .dau-trang.mo .nut-menu span:nth-child(2) { opacity: 0; }
  .dau-trang.mo .nut-menu span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Dải ảnh banner: hiện trọn ảnh, không chữ đè lên. --ti-le do JS đặt theo ảnh thật. */
.bang-anh { width: 100%; aspect-ratio: var(--ti-le, 2.6667); background-color: #06585b;
  background-image: var(--anh-nen, none); background-size: cover; background-position: center; background-repeat: no-repeat; }

/* Hero trang chủ */
.hero { position: relative; color: #fff; background: linear-gradient(120deg, #06585b, var(--chu-dao)); }
.hero .khung { position: relative; padding-top: clamp(36px, 5vw, 60px); padding-bottom: clamp(40px, 6vw, 68px); }
.hero-noi { max-width: 620px; }
.hero .nhan-phan { background: rgba(255, 255, 255, .16); color: #fff; }
.hero p.dan { font-size: 1.12rem; opacity: .95; margin-bottom: 28px; }
.hero .nut-vien { color: #fff; border-color: rgba(255, 255, 255, .7); }
.hero .nut-vien:hover { background: rgba(255, 255, 255, .12); color: #fff; }
@media (max-width: 700px) {
      }

/* Hai lối vào */
.hai-loi { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: -56px; position: relative; }
.loi-vao { background: #fff; border: 1px solid var(--vien); border-radius: var(--bo); padding: 26px; box-shadow: var(--bong); display: flex; flex-direction: column; }
.loi-vao p { color: var(--chu-phu); flex: 1; }
.loi-vao .nut { align-self: flex-start; }
@media (max-width: 700px) { .hai-loi { grid-template-columns: 1fr; margin-top: 24px; } }

/* Giới thiệu */
.gioi-thieu { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(28px, 5vw, 64px); align-items: center; }
.gioi-thieu img { border-radius: var(--bo); width: 100%; object-fit: cover; aspect-ratio: 3 / 2; }
.gioi-thieu .nhom-nut { margin-top: 8px; }
@media (max-width: 860px) { .gioi-thieu { grid-template-columns: 1fr; } }

/* Lưới thẻ */
.luoi-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 860px) { .luoi-3 { grid-template-columns: 1fr; } }
.the { background: #fff; border: 1px solid var(--vien); border-radius: var(--bo); padding: 26px; }
.the p { color: var(--chu-phu); margin: 0; }
.the .bieu-tuong { width: 100%; height: 120px; object-fit: contain; margin-bottom: 14px; }

/* Mô hình hoạt động */
.mo-hinh { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 14px; align-items: stretch; }
.mo-hinh .buoc { background: #fff; border: 1px solid var(--vien); border-radius: var(--bo); padding: 24px; text-align: center; }
.mo-hinh .so { width: 44px; height: 44px; margin: 0 auto 12px; border-radius: 50%; background: var(--chu-dao); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 1.1rem; }
.mo-hinh .buoc p { color: var(--chu-phu); margin: 0; font-size: .96rem; }
.mo-hinh .mui-ten { display: grid; place-items: center; color: var(--chu-dao); font-size: 1.6rem; font-weight: 700; }
@media (max-width: 860px) { .mo-hinh { grid-template-columns: 1fr; } .mo-hinh .mui-ten { transform: rotate(90deg); } }

/* Đối tác */
.logo-doi-tac { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.logo-doi-tac div { width: 120px; background: #fff; border: 1px solid var(--vien); border-radius: 14px; padding: 10px; aspect-ratio: 1; display: grid; place-items: center; }
@media (max-width: 620px) { .logo-doi-tac { gap: 12px; } .logo-doi-tac div { width: calc((100% - 24px) / 3); } }
.logo-doi-tac img { width: 100%; height: 100%; object-fit: contain; }

/* Dải kêu gọi */
.dai-cta { background: linear-gradient(120deg, var(--chu-dao-dam), var(--chu-dao)); color: #fff; border-radius: 22px; padding: clamp(28px, 5vw, 52px); display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.dai-cta h2 { margin: 0 0 6px; }
.dai-cta p { margin: 0; opacity: .92; max-width: 620px; }

/* Đầu trang con */
.dau-con { position: relative; color: #fff; text-align: center; background: linear-gradient(120deg, #06585b, var(--chu-dao)); }
.dau-con .khung { position: relative; padding-top: clamp(32px, 5vw, 52px); padding-bottom: clamp(36px, 6vw, 60px); }
.dau-con p { max-width: 680px; margin: 0 auto 24px; opacity: .95; font-size: 1.08rem; }
.dau-con .nhan-phan { background: rgba(255, 255, 255, .16); color: #fff; }
.dau-con .nhom-nut { justify-content: center; }
.dau-con .nut-vien { color: #fff; border-color: rgba(255, 255, 255, .7); }
.dau-con .nut-vien:hover { background: rgba(255, 255, 255, .12); color: #fff; }

/* Quà tặng */
.luoi-qua { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 960px) { .luoi-qua { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .luoi-qua { grid-template-columns: 1fr; } }
.the-qua { background: #fff; border: 1px solid var(--vien); border-radius: var(--bo); overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .2s, transform .2s; }
.the-qua:hover { box-shadow: var(--bong); transform: translateY(-2px); }
.the-anh { aspect-ratio: 16 / 9; background: var(--nen-phu); }
.the-anh img { width: 100%; height: 100%; object-fit: cover; }
.the-noi { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.the-noi .nhan { align-self: flex-start; font-size: .8rem; font-weight: 700; color: var(--chu-dao-dam); background: var(--chu-dao-nhat); border-radius: 99px; padding: 2px 10px; margin-bottom: 10px; }
.the-noi h3 { margin-bottom: 4px; }
.the-noi .gia-tri { color: var(--nhan); font-weight: 800; font-size: 1.2rem; margin-bottom: 8px; }
.the-noi p { color: var(--chu-phu); font-size: .95rem; margin-bottom: 8px; }
.the-noi .luu-y { font-size: .84rem; margin-bottom: 16px; flex: 1; }
.the-noi .nut { align-self: stretch; }

/* Quà đã ngưng */
.the-anh { position: relative; }
.bang-ngung { position: absolute; top: 12px; left: 12px; background: rgba(28, 43, 45, .88); color: #fff; font-size: .8rem; font-weight: 700; padding: 5px 12px; border-radius: 99px; }
.the-qua.da-ngung { opacity: .96; }
.the-qua.da-ngung:hover { transform: none; box-shadow: none; }
.the-qua.da-ngung .the-anh img { filter: grayscale(1); opacity: .6; }
.the-qua.da-ngung .gia-tri { color: var(--chu-phu); text-decoration: line-through; }
.the-qua.da-ngung h3 { color: var(--chu-phu); }
.nut-ngung { background: var(--nen-phu); border-color: var(--vien); color: var(--chu-phu); cursor: default; }
.nut-ngung:hover { background: var(--nen-phu); border-color: var(--vien); transform: none; }

/* Nút Zalo */
.bt-zalo { width: 22px; height: 22px; flex: none; color: #0068ff; }
.nut-zalo { background: #0068ff; border-color: #0068ff; color: #fff; margin-bottom: 14px; }
.nut-zalo:hover { background: #0055d4; border-color: #0055d4; }
.nut-zalo .bt-zalo { color: #fff; }
.zalo-noi { position: fixed; right: 16px; bottom: 16px; z-index: 60; display: inline-flex; align-items: center; gap: 8px; background: #0068ff; color: #fff; font-weight: 700; text-decoration: none; padding: 12px 18px; border-radius: 99px; box-shadow: 0 8px 24px rgba(0, 60, 140, .35); }
.zalo-noi:hover { background: #0055d4; color: #fff; }
.zalo-noi .bt-zalo { width: 24px; height: 24px; color: #fff; }
@media (max-width: 620px) { .zalo-noi { right: 12px; bottom: 12px; padding: 10px 14px; font-size: .92rem; } }

/* Quy trình */
.quy-trinh { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: buoc; }
@media (max-width: 860px) { .quy-trinh { grid-template-columns: 1fr; } }
.quy-trinh li { counter-increment: buoc; background: #fff; border: 1px solid var(--vien); border-radius: var(--bo); padding: 26px 24px 24px; position: relative; }
.quy-trinh li::before { content: counter(buoc, decimal-leading-zero); display: block; font-size: 2rem; font-weight: 800; color: var(--chu-dao); line-height: 1; margin-bottom: 12px; }
.quy-trinh p { color: var(--chu-phu); margin: 0; }
.ghi-chu { text-align: center; color: var(--chu-phu); margin-top: 32px; }

/* Chân trang */
.chan-trang { background: #0e2f31; color: #cfe3e3; padding: 64px 0 24px; }
.chan-trang a { color: #fff; text-decoration: none; }
.chan-trang a:hover { text-decoration: underline; }
.chan-luoi { display: grid; grid-template-columns: 1fr 1.2fr 1fr; gap: 36px; }
@media (max-width: 860px) { .chan-luoi { grid-template-columns: 1fr; } }
.logo-chan { height: 34px; width: auto; background: #fff; padding: 8px 12px; border-radius: 10px; box-sizing: content-box; margin-bottom: 16px; }
.chan-gt .phu { font-size: .9rem; opacity: .8; }
.chan-lh { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.chan-lh span { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; opacity: .7; }
.chan-cta .nut { margin: 4px 0 14px; }
.chan-cta .nut:hover { text-decoration: none; }
.lien-ket-phu { display: block; font-weight: 600; }
.ban-quyen { border-top: 1px solid rgba(255, 255, 255, .12); margin: 44px 0 0; padding-top: 20px; font-size: .88rem; opacity: .7; }

/* Ảnh quà lỗi hoặc sai tên → khung màu thương hiệu kèm tên quà, không hiện ô vỡ */
.the-anh.khong-anh { background: linear-gradient(135deg, var(--chu-dao-dam), var(--chu-dao)); display: grid; place-items: center; padding: 16px; }
.the-anh.khong-anh::after { content: attr(data-ten); color: #fff; font-weight: 800; font-size: 1.2rem; text-align: center; line-height: 1.3; }