:root {
  --giay: #f7f2e9;
  --giay-2: #efe6d6;
  --muc: #2a2118;
  --muc-nhat: #5c4f42;
  --ngoc: #1f5c4a;
  --ngoc-dam: #164536;
  --vang: #b8862f;
  --son: #9e2b25;
  --vien: #ddd1bd;
  --trang: #fffdf8;
  --bo: 14px;
  --bong: 0 1px 2px rgba(42, 33, 24, .06), 0 8px 24px rgba(42, 33, 24, .08);
  --rong: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--giay);
  color: var(--muc);
  font: 16px/1.65 "Be Vietnam Pro", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--ngoc); }
h1, h2, h3 { font-family: "Lora", Georgia, serif; line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.khung { max-width: var(--rong); margin: 0 auto; padding: 0 16px; }
.muc { padding: 72px 0; }
.muc-nen { background: var(--giay-2); }
.tieu-de-muc { max-width: 680px; margin-bottom: 36px; }
.tieu-de-muc .nhan { display: inline-block; font-size: .8rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--vang); margin-bottom: 8px; }
.tieu-de-muc p { color: var(--muc-nhat); font-size: 1.05rem; }

/* Đầu trang */
.dau-trang { position: sticky; top: 0; z-index: 20; background: rgba(247, 242, 233, .92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--vien); }
.dau-trang .khung { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--muc); font-family: "Lora", serif; font-weight: 700; font-size: 1.25rem; }
.logo-dau { width: 34px; height: 34px; border-radius: 8px; background: var(--son); color: #fff; display: grid; place-items: center; font-size: .95rem; font-family: "Lora", serif; }
.menu { display: flex; gap: 20px; margin-left: auto; }
.menu a { color: var(--muc-nhat); text-decoration: none; font-size: .95rem; font-weight: 500; }
.menu a:hover { color: var(--ngoc); }
.goi-dau { white-space: nowrap; }

/* Nút */
.nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 22px; border-radius: 999px; border: 0; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; transition: transform .15s, background .15s; }
.nut:active { transform: translateY(1px); }
.nut-chinh { background: var(--ngoc); color: #fff; }
.nut-chinh:hover { background: var(--ngoc-dam); }
.nut-phu { background: transparent; color: var(--muc); border: 1.5px solid var(--muc); }
.nut-phu:hover { background: var(--muc); color: var(--giay); }
.nut-son { background: var(--son); color: #fff; }
.nut[disabled] { opacity: .6; cursor: wait; }

/* Mở đầu */
.mo-dau { padding: 56px 0 72px; }
.mo-dau .khung { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.mo-dau .nhan { color: var(--son); font-weight: 600; font-size: .95rem; margin-bottom: 12px; display: block; }
.mo-dau p.mo-ta { font-size: 1.15rem; color: var(--muc-nhat); max-width: 560px; }
.mo-dau .hang-nut { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0 24px; }
.cam-ket-nho { display: flex; flex-wrap: wrap; gap: 8px 20px; padding: 0; margin: 0; list-style: none; font-size: .93rem; color: var(--muc-nhat); }
.cam-ket-nho li::before { content: "✓ "; color: var(--ngoc); font-weight: 700; }
.bat-quai { width: 100%; max-width: 420px; margin: 0 auto; }

/* Thẻ */
.luoi-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.the { background: var(--trang); border: 1px solid var(--vien); border-radius: var(--bo); padding: 26px; box-shadow: var(--bong); }
.the .bieu-tuong { width: 44px; height: 44px; border-radius: 12px; background: var(--giay-2); display: grid; place-items: center; font-size: 1.35rem; margin-bottom: 16px; }
.the p { color: var(--muc-nhat); margin: 0; }
.the .giai-phap { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--vien); color: var(--ngoc-dam); font-weight: 500; }

/* Quy trình */
.quy-trinh { counter-reset: buoc; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; padding: 0; margin: 0; list-style: none; }
.quy-trinh li { position: relative; padding: 52px 4px 0; }
.quy-trinh li::before { counter-increment: buoc; content: counter(buoc); position: absolute; top: 0; left: 0; width: 38px; height: 38px; border-radius: 50%; background: var(--muc); color: var(--giay); display: grid; place-items: center; font-weight: 700; font-family: "Lora", serif; }
.quy-trinh strong { display: block; margin-bottom: 4px; }
.quy-trinh span { color: var(--muc-nhat); font-size: .93rem; }

/* Gói */
.goi { display: flex; flex-direction: column; }
.goi.noi-bat { border: 2px solid var(--ngoc); position: relative; }
.goi.noi-bat::before { content: "Được chọn nhiều"; position: absolute; top: -12px; left: 24px; background: var(--ngoc); color: #fff; font-size: .75rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.goi .gia { font-family: "Lora", serif; font-size: 1.15rem; color: var(--son); margin: 4px 0 16px; }
.goi ul { padding-left: 20px; margin: 0 0 20px; color: var(--muc-nhat); flex: 1; }
.goi li { margin-bottom: 6px; }

/* Công cụ xem hướng */
.cong-cu { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.ket-qua { display: none; }
.ket-qua.hien { display: block; }
.o-menh { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0 20px; }
.o-menh div { background: var(--giay-2); border-radius: 10px; padding: 12px; text-align: center; }
.o-menh small { display: block; color: var(--muc-nhat); font-size: .78rem; }
.o-menh b { font-family: "Lora", serif; font-size: 1.1rem; }
.loi-moi { background: #fbf3e2; border-left: 4px solid var(--vang); padding: 14px 16px; border-radius: 0 10px 10px 0; margin-bottom: 18px; font-size: .97rem; }
.cho-trong { color: var(--muc-nhat); text-align: center; padding: 48px 16px; border: 1.5px dashed var(--vien); border-radius: var(--bo); }

/* Form */
.form { display: grid; gap: 14px; }
.hai-cot { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: block; font-weight: 500; font-size: .93rem; margin-bottom: 5px; }
label .bat-buoc { color: var(--son); }
input, select, textarea {
  width: 100%; font: inherit; color: var(--muc); background: #fff;
  border: 1.5px solid var(--vien); border-radius: 10px; padding: 11px 13px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--ngoc); box-shadow: 0 0 0 3px rgba(31, 92, 74, .15); }
textarea { min-height: 90px; resize: vertical; }
.dong-y { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: .88rem; color: var(--muc-nhat); }
.dong-y input { width: 18px; height: 18px; margin-top: 3px; flex: none; accent-color: var(--ngoc); }
.bay { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.thong-bao { padding: 12px 14px; border-radius: 10px; font-size: .95rem; display: none; }
.thong-bao.loi { display: block; background: #fbe9e7; color: var(--son); }
.thong-bao.tot { display: block; background: #e5f1ec; color: var(--ngoc-dam); }
.ghi-chu-nho { font-size: .82rem; color: var(--muc-nhat); }

/* Công trình */
.anh-cho { aspect-ratio: 4/3; border-radius: 10px; margin: -6px -6px 16px; background:
  repeating-linear-gradient(135deg, var(--giay-2) 0 12px, #e8dcc7 12px 24px); display: grid; place-items: center; color: var(--muc-nhat); font-size: .85rem; }
.the-ct .thong-so { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .88rem; color: var(--muc-nhat); }

/* Liên hệ */
.lien-he { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; }
.lien-he .kenh { display: grid; gap: 12px; margin-top: 20px; }
.lien-he .kenh a { display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: var(--trang); border: 1px solid var(--vien); border-radius: 12px; text-decoration: none; color: var(--muc); font-weight: 600; }
.lien-he .kenh small { display: block; font-weight: 400; color: var(--muc-nhat); }

/* Chân trang */
.chan-trang { background: var(--muc); color: #d9cfbf; padding: 40px 0 100px; font-size: .92rem; }
.chan-trang .khung { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; }
.chan-trang a { color: #fff; }
.chan-trang .logo { color: #fff; }

/* Thanh dưới trên điện thoại */
.thanh-duoi { display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; background: var(--trang); border-top: 1px solid var(--vien); padding: 8px 10px calc(8px + env(safe-area-inset-bottom)); gap: 8px; }
.thanh-duoi a { flex: 1; white-space: nowrap; text-align: center; padding: 11px 6px; border-radius: 10px; font-weight: 600; font-size: .92rem; text-decoration: none; }
.thanh-duoi .goi-ngay { background: var(--son); color: #fff; }
.thanh-duoi .zalo { background: #0068ff; color: #fff; }
.thanh-duoi .xem { background: var(--giay-2); color: var(--muc); }

@media (max-width: 900px) {
  .menu { display: none; }
  .goi-dau { margin-left: auto; }
  .mo-dau .khung, .cong-cu, .lien-he { grid-template-columns: 1fr; }
  .bat-quai { max-width: 260px; }
  .mo-dau { padding: 32px 0 56px; }
  .luoi-3 { grid-template-columns: 1fr; }
  .quy-trinh { grid-template-columns: 1fr; gap: 20px; }
  .quy-trinh li { padding: 4px 0 0 54px; min-height: 40px; }
  .thanh-duoi { display: flex; }
  .muc { padding: 56px 0; }
}
@media (max-width: 520px) {
  .hai-cot { grid-template-columns: 1fr; }
  .goi-dau { padding: 10px 14px; font-size: .88rem; }
  .mo-dau .hang-nut .nut { flex: 1 1 100%; }
}