:root {
  --nau-dam: #4a3524;
  --nau: #6b4f35;
  --nau-nhat: #a3815a;
  --kem: #faf6f0;
  --kem-dam: #f0e6d8;
  --chu: #2e2620;
  --chu-nhat: #6a5f55;
  --vien: #e3d7c6;
  --trang: #ffffff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--chu);
  background: var(--kem);
  line-height: 1.7;
  font-size: 17px;
}

.khung { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

/* ---- Thanh đầu trang ---- */
header {
  background: var(--trang);
  border-bottom: 1px solid var(--vien);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-trong {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 20px;
  max-width: 1040px;
  margin: 0 auto;
}
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-hinh {
  width: 46px; height: 46px; flex: none;
  border-radius: 10px;
  background: var(--nau);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 19px; letter-spacing: .5px;
}
.logo-chu { font-weight: 700; font-size: 19px; color: var(--nau-dam); line-height: 1.25; }
.logo-phu { font-size: 13px; color: var(--chu-nhat); font-weight: 400; }
nav a {
  color: var(--nau-dam);
  text-decoration: none;
  font-size: 15px;
  margin-left: 22px;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
nav a:hover { border-bottom-color: var(--nau-nhat); }

/* ---- Hero ---- */
.hero {
  background: linear-gradient(160deg, #5c4230 0%, #3d2b1c 100%);
  color: #fff;
  padding: 64px 0 60px;
}
.hero h1 { font-size: 34px; line-height: 1.3; margin-bottom: 16px; font-weight: 700; }
.hero p { font-size: 18px; color: #ecdfd0; max-width: 620px; }
.hero-nut { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
.nut {
  display: inline-block;
  background: #d9a441;
  color: #3d2b1c;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
}
.nut:hover { background: #e6b65b; }
.nut-vien {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.55);
}
.nut-vien:hover { background: rgba(255,255,255,.12); }

/* ---- Khối nội dung ---- */
section { padding: 56px 0; }
section.nen-trang { background: var(--trang); }
h2 {
  font-size: 26px;
  color: var(--nau-dam);
  margin-bottom: 10px;
  font-weight: 700;
}
.phu-de { color: var(--chu-nhat); margin-bottom: 30px; font-size: 16px; }

.luoi {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 20px;
}
.the {
  background: var(--trang);
  border: 1px solid var(--vien);
  border-radius: 12px;
  padding: 24px;
}
section.nen-trang .the { background: var(--kem); }
.the h3 { font-size: 18px; color: var(--nau-dam); margin-bottom: 10px; }
.the p { color: var(--chu-nhat); font-size: 15.5px; }
.the ul { margin: 10px 0 0 18px; color: var(--chu-nhat); font-size: 15.5px; }
.the li { margin-bottom: 4px; }

/* ---- Liên hệ ---- */
.lien-he-luoi {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 8px;
}
.lh-muc {
  background: var(--trang);
  border: 1px solid var(--vien);
  border-radius: 12px;
  padding: 20px 22px;
}
.lh-nhan {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--nau-nhat);
  font-weight: 600;
  margin-bottom: 6px;
}
.lh-noi-dung { font-size: 16.5px; color: var(--chu); }
.lh-noi-dung a { color: var(--nau); }

/* ---- Trang văn bản (chính sách) ---- */
.van-ban { background: var(--trang); padding: 44px 0 60px; }
.van-ban h1 { font-size: 30px; color: var(--nau-dam); margin-bottom: 8px; }
.van-ban .ngay { color: var(--chu-nhat); font-size: 15px; margin-bottom: 30px; }
.van-ban h2 { font-size: 20px; margin: 32px 0 10px; }
.van-ban h3 { font-size: 17px; color: var(--nau-dam); margin: 22px 0 8px; }
.van-ban p { margin-bottom: 14px; color: var(--chu); }
.van-ban ul { margin: 0 0 16px 22px; }
.van-ban li { margin-bottom: 7px; }
.van-ban a { color: var(--nau); }
.ngan-cach {
  border: 0;
  border-top: 1px solid var(--vien);
  margin: 44px 0 36px;
}
.hop-nho {
  background: var(--kem);
  border: 1px solid var(--vien);
  border-left: 4px solid var(--nau-nhat);
  border-radius: 8px;
  padding: 18px 20px;
  margin-bottom: 20px;
}
.hop-nho p:last-child { margin-bottom: 0; }

/* ---- Chân trang ---- */
footer {
  background: var(--nau-dam);
  color: #d9ccbd;
  padding: 40px 0 34px;
  font-size: 15px;
}
footer .ten-cty { color: #fff; font-weight: 600; font-size: 16px; margin-bottom: 8px; }
footer p { margin-bottom: 5px; }
footer a { color: #e8c98a; text-decoration: none; }
footer a:hover { text-decoration: underline; }
.chan-lien-ket { margin-top: 18px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.14); }
.chan-lien-ket a { margin-right: 20px; }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .hero { padding: 46px 0 44px; }
  .hero h1 { font-size: 27px; }
  .hero p { font-size: 16.5px; }
  section { padding: 42px 0; }
  h2 { font-size: 22px; }
  nav a { margin-left: 0; margin-right: 18px; }
  .header-trong { justify-content: flex-start; }
}