:root {
  --nen: #ffffff;
  --nen-phu: #f5f3ee;
  --chu: #1c1b19;
  --chu-phu: #5c5850;
  --vang: #c79a3b;
  --vang-dam: #a87f2a;
  --toi: #141414;
  --vien: #e4e0d6;
  --bo: 10px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--nen); color: var(--chu); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
img { max-width: 100%; height: auto; }
a { color: var(--vang-dam); }
h1, h2, h3 { line-height: 1.25; }
.khung { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.an { position: absolute; left: -9999px; }

/* Đầu trang */
.dau { background: var(--toi); position: sticky; top: 0; z-index: 10; }
.dau-trong { display: flex; align-items: center; justify-content: space-between; min-height: 68px; }
.logo img { display: block; height: 44px; width: auto; }
.menu { display: flex; gap: 22px; }
.menu a { color: #e9e4d8; text-decoration: none; font-size: 15px; }
.menu a:hover, .menu a[aria-current] { color: var(--vang); }
.nut-menu { display: none; background: none; border: 0; color: #fff; font-size: 26px; cursor: pointer; }
@media (max-width: 860px) {
  .nut-menu { display: block; }
  .menu { display: none; position: absolute; left: 0; right: 0; top: 68px; background: var(--toi); flex-direction: column; gap: 0; padding: 8px 16px 16px; }
  .menu.mo { display: flex; }
  .menu a { padding: 10px 0; border-top: 1px solid #2a2a2a; }
}

/* Hero */
.hero { background: radial-gradient(circle at 80% 20%, #3a2f17 0, var(--toi) 60%); color: #fff; padding: 72px 0 80px; }
.nhan { color: var(--vang); letter-spacing: .12em; font-weight: 600; margin: 0 0 8px; }
.hero h1 { font-size: clamp(30px, 5vw, 50px); margin: 0 0 16px; }
.mo-ta { max-width: 600px; color: #d7d1c3; font-size: 18px; }

/* Nút */
.hang-nut { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.nut { display: inline-block; padding: 12px 22px; border-radius: var(--bo); font-weight: 600; text-decoration: none; border: 2px solid var(--vang); cursor: pointer; font-size: 16px; }
.nut.chinh { background: var(--vang); color: #1a1405; }
.nut.chinh:hover { background: var(--vang-dam); border-color: var(--vang-dam); }
.nut.phu { background: transparent; color: inherit; }
.hero .nut.phu { color: #fff; }

/* Mục */
.muc { padding: 64px 16px; }
.muc h2 { font-size: 30px; margin: 0 0 28px; }
.luoi-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.luoi-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
@media (max-width: 760px) { .luoi-2 { grid-template-columns: 1fr; } }
.the { background: var(--nen-phu); border: 1px solid var(--vien); border-radius: var(--bo); padding: 24px; }
.the h3 { margin-top: 0; }
.the p { color: var(--chu-phu); }
.nen-toi { background: var(--toi); color: #fff; }
.buoc { list-style: none; counter-reset: b; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.buoc li { counter-increment: b; border-top: 2px solid var(--vang); padding-top: 14px; }
.buoc li::before { content: "0" counter(b); color: var(--vang); font-weight: 700; display: block; }
.buoc b { display: block; font-size: 18px; }
.buoc span { color: #cfc8b8; }
.cta { text-align: center; }
.cta .hang-nut { justify-content: center; }

/* Trang bài */
.bai { padding-top: 40px; padding-bottom: 64px; max-width: 860px; }
.bai.luoi-2 { max-width: 1120px; }
.bai h1 { font-size: 34px; }
.giua { text-align: center; }
.giua .hang-nut { justify-content: center; }

/* Form */
.form-lh { background: var(--nen-phu); border: 1px solid var(--vien); border-radius: var(--bo); padding: 24px; }
.form-lh h2 { margin-top: 0; }
.form-lh label { display: block; margin-bottom: 14px; font-weight: 600; font-size: 15px; }
.form-lh input, .form-lh textarea { display: block; width: 100%; margin-top: 6px; padding: 10px 12px; font: inherit; border: 1px solid #cbc5b6; border-radius: 8px; background: #fff; }
.ket-qua { min-height: 1.5em; font-weight: 600; }

/* Chân trang */
.chan { background: var(--toi); color: #cfc8b8; padding: 48px 0 16px; margin-top: 0; }
.chan h3 { color: #fff; font-size: 16px; }
.chan a { color: #e9d9b0; }
.chan-luoi { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; }
.nho, .ban-quyen { font-size: 13px; color: #8f897c; }
.ban-quyen { border-top: 1px solid #2a2a2a; padding-top: 14px; margin-top: 24px; }

/* Nút nổi */
.nut-noi { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 10px; z-index: 20; }
.nut-noi a { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; color: #fff; text-decoration: none; font-weight: 700; font-size: 13px; box-shadow: 0 4px 14px rgba(0,0,0,.25); }
.nut-noi .zalo { background: #0068ff; }
.nut-noi .goi { background: #1aa34a; }

/* Nội dung chép từ Sapo */
.bai.rong { max-width: 1120px; }
.duong-dan { font-size: 14px; color: var(--chu-phu); }
.sapo img { max-width: 100%; height: auto; }
.sapo table { border-collapse: collapse; max-width: 100%; }
.sapo td, .sapo th { border: 1px solid var(--vien); padding: 6px 10px; vertical-align: top; }
.sapo .row { display: flex; flex-wrap: wrap; margin: 0 -8px; }
.sapo [class*="col-"] { padding: 0 8px; flex: 1 1 260px; min-width: 0; }
.sapo .d-none, .sapo .hidden, .sapo .modal { display: none; }
.sapo iframe { max-width: 100%; }
.luoi-sp { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-top: 16px; }
.the-sp, .the-bai { display: flex; flex-direction: column; gap: 6px; text-decoration: none; color: var(--chu); background: var(--nen-phu); border: 1px solid var(--vien); border-radius: var(--bo); padding: 12px; }
.the-sp img, .the-bai img { aspect-ratio: 1; object-fit: contain; background: #fff; border-radius: 6px; width: 100%; }
.the-bai img { aspect-ratio: 16/9; object-fit: cover; }
.the-sp span { color: var(--vang-dam); font-weight: 600; }
.the-bai span { color: var(--chu-phu); font-size: 14px; }
.luoi-bai { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.nhom-luoi { display: grid; grid-template-columns: 240px 1fr; gap: 32px; }
.danh-muc { display: flex; flex-direction: column; font-size: 14px; }
.danh-muc h3 { margin-top: 0; }
.danh-muc a { padding: 5px 0; border-bottom: 1px solid var(--vien); text-decoration: none; color: var(--chu); }
.danh-muc a:hover { color: var(--vang-dam); }
@media (max-width: 760px) { .nhom-luoi { grid-template-columns: 1fr; } .danh-muc { order: 2; } }
.sp-luoi { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
@media (max-width: 760px) { .sp-luoi { grid-template-columns: 1fr; } }
.sp-anh { display: grid; gap: 10px; }
.sp-anh img { width: 100%; background: #fff; border: 1px solid var(--vien); border-radius: var(--bo); }
.sp-gia { font-size: 24px; font-weight: 700; color: var(--vang-dam); }
.cuon { overflow-x: auto; }
.bang { border-collapse: collapse; min-width: 100%; font-size: 15px; }
.bang th, .bang td { border: 1px solid var(--vien); padding: 6px 10px; text-align: left; white-space: nowrap; }
.bang th { background: var(--nen-phu); }
.sapo svg { width: 1em; height: 1em; vertical-align: -0.125em; }