:root {
  --nen: #f6f1e9;
  --nen-2: #efe7da;
  --the: #fffdf9;
  --muc: #1b1712;
  --muc-2: #5d554b;
  --vien: #e2d8c8;
  --nhan: #ff4d2e;
  --nhan-dam: #d93a1d;
  --nhan-nhat: #ffe3dc;
  --vang: #ffd23f;
  --xanh: #1f8a5b;
  --toi: #17130f;
  --bo: 18px;
  --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--nen); color: var(--muc); font-family: var(--font); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; }
.khung { width: min(1120px, 100% - 32px); margin-inline: auto; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
h2 { font-size: clamp(28px, 4.2vw, 44px); font-weight: 800; }
.mo-dau { font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--nhan-dam); margin: 0 0 12px; }
.phu { color: var(--muc-2); font-size: 18px; max-width: 640px; }

/* nút */
.nut { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 15px 26px; border-radius: 999px; font: 700 16px var(--font); text-decoration: none; border: 2px solid var(--muc); cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s; }
.nut-chinh { background: var(--nhan); border-color: var(--nhan); color: #fff; box-shadow: 0 6px 0 var(--nhan-dam); }
.nut-chinh:hover { transform: translateY(-2px); box-shadow: 0 8px 0 var(--nhan-dam); }
.nut-chinh:active { transform: translateY(3px); box-shadow: 0 2px 0 var(--nhan-dam); }
.nut-phu { background: transparent; color: var(--muc); }
.nut-phu:hover { background: var(--muc); color: var(--nen); }
.nut:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 3px solid var(--vang); outline-offset: 2px; }
.nut[disabled] { opacity: .6; cursor: wait; }

/* thanh trên */
.thanh { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--nen) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--vien); }
.thanh .khung { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 800; font-size: 18px; text-decoration: none; display: flex; align-items: center; gap: 10px; }
.logo i { width: 12px; height: 12px; border-radius: 50%; background: var(--nhan); box-shadow: 0 0 0 4px var(--nhan-nhat); animation: nhay 1.6s infinite; }
@keyframes nhay { 50% { opacity: .35; } }
.thanh .nut { padding: 10px 18px; font-size: 14px; box-shadow: none; }

/* HERO */
.hero { padding: 64px 0 80px; }
.hero .khung { display: grid; grid-template-columns: 1.25fr .75fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(36px, 6vw, 68px); font-weight: 800; }
.hero h1 mark { background: none; color: var(--nhan); }
.hero .phu { margin: 22px 0 30px; font-size: 19px; }
.hero-nut { display: flex; flex-wrap: wrap; gap: 14px; }
.chip-hang { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; padding: 0; list-style: none; }
.chip-hang li { background: var(--the); border: 1px solid var(--vien); border-radius: 999px; padding: 7px 14px; font-size: 14px; font-weight: 600; }
.chip-hang li::before { content: "✓ "; color: var(--xanh); font-weight: 800; }

.dien-thoai { position: relative; width: min(300px, 100%); aspect-ratio: 9/16; margin-inline: auto; border-radius: 36px; background: var(--toi); padding: 12px; box-shadow: 0 30px 60px -20px rgba(27,23,18,.45); transform: rotate(2.5deg); }
.man-hinh { position: relative; height: 100%; border-radius: 26px; overflow: hidden; background:
  radial-gradient(120% 70% at 50% 30%, #6b4a33 0%, #2c211a 60%, #120e0b 100%); }
.man-hinh .nguoi { position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); width: 72%; aspect-ratio: 1/1.15; border-radius: 50% 50% 0 0 / 60% 60% 0 0; background: linear-gradient(#d9a77f, #b07a55); opacity: .55; }
.man-hinh .dau { position: absolute; left: 50%; top: 24%; transform: translateX(-50%); width: 38%; aspect-ratio: 1; border-radius: 50%; background: #d9a77f; opacity: .6; }
.rec { position: absolute; top: 16px; left: 16px; color: #fff; font: 700 11px var(--font); letter-spacing: .1em; display: flex; gap: 6px; align-items: center; }
.rec::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--nhan); animation: nhay 1.2s infinite; }
.phu-de { position: absolute; left: 10px; right: 10px; bottom: 26%; text-align: center; font: 800 26px/1.15 var(--font); color: #fff; text-transform: uppercase; text-shadow: 0 3px 0 rgba(0,0,0,.5); }
.phu-de span { opacity: 0; display: inline-block; transform: translateY(8px) scale(.9); transition: all .18s; margin: 0 3px; }
.phu-de span.hien { opacity: 1; transform: none; }
.phu-de span.nhan { color: var(--vang); }
.chu-thich { text-align: center; font-size: 13px; color: var(--muc-2); margin-top: 18px; }

/* Thích thú: nỗi khổ */
.vung { padding: 88px 0; }
.vung-toi { background: var(--toi); color: #f6f1e9; }
.vung-toi .phu { color: #bfb5a7; }
.vung-toi .mo-dau { color: var(--vang); }
.luoi-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.kho { background: #241e18; border: 1px solid #3a3129; border-radius: var(--bo); padding: 28px; }
.kho .so { font: 800 15px var(--font); color: var(--nhan); }
.kho h3 { font-size: 21px; margin: 10px 0 10px; }
.kho p { margin: 0; color: #bfb5a7; }
.cau-noi { margin-top: 48px; font-size: clamp(22px, 3vw, 30px); font-weight: 700; }
.cau-noi b { color: var(--vang); }

.noi-that { display: grid; grid-template-columns: auto 1fr; gap: 32px; align-items: center; background: var(--the); border: 1px solid var(--vien); border-radius: 24px; padding: 36px; }
.noi-that img.chan-dung { width: 132px; height: 132px; border-radius: 50%; object-fit: cover; border: 4px solid var(--nhan-nhat); }
.noi-that h2 { font-size: clamp(24px, 3vw, 32px); }
.noi-that p { margin: 12px 0 0; color: var(--muc-2); }
.cong-cu { display: flex; align-items: center; gap: 14px; margin-top: 18px; flex-wrap: wrap; font-size: 14px; color: var(--muc-2); }
.cong-cu img { width: 32px; height: 32px; object-fit: contain; }
.uu-dai { display: inline-block; background: var(--vang); color: var(--muc); font-weight: 800; padding: 3px 10px; border-radius: 6px; }

/* Khao khát: bảng giá */
.gom { display: flex; flex-wrap: wrap; gap: 10px 22px; margin: 26px 0 0; padding: 0; list-style: none; }
.gom li { font-weight: 600; }
.gom li::before { content: "●"; color: var(--nhan); margin-right: 8px; font-size: 12px; vertical-align: 2px; }
.bang-gia { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; align-items: stretch; }
.goi { background: var(--the); border: 2px solid var(--vien); border-radius: 22px; padding: 30px 26px; display: flex; flex-direction: column; position: relative; }
.goi.noi { border-color: var(--muc); box-shadow: 8px 8px 0 var(--muc); }
.goi .nhan-goi { position: absolute; top: -14px; left: 24px; background: var(--nhan); color: #fff; font: 700 12px var(--font); padding: 5px 12px; border-radius: 999px; }
.goi h3 { font-size: 20px; }
.goi .gia { font-size: 40px; font-weight: 800; letter-spacing: -.03em; margin: 12px 0 2px; }
.goi .moi { color: var(--muc-2); font-size: 15px; }
.goi .coc { margin: 18px 0 24px; padding: 12px 14px; background: var(--nen); border-radius: 12px; font-size: 14px; }
.goi .nut { margin-top: auto; }

.cam-ket { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 56px; }
.ck { padding: 24px; border-radius: var(--bo); background: var(--nhan-nhat); }
.ck .bieu { font-size: 30px; }
.ck h3 { font-size: 19px; margin: 10px 0 6px; }
.ck p { margin: 0; color: var(--muc-2); font-size: 15px; }
.chu-nho { font-size: 13px; color: var(--muc-2); margin-top: 16px; }

.cam-ket.cam-ket-3 { grid-template-columns: repeat(3, 1fr); }
.buoc-the { background: var(--the); border: 1px solid var(--vien); border-radius: var(--bo); padding: 26px; }
.buoc-the .so { width: 40px; height: 40px; border-radius: 50%; background: var(--nhan); color: #fff; font-weight: 800; display: grid; place-items: center; }
.buoc-the h3 { font-size: 20px; margin: 14px 0 8px; }
.buoc-the p { margin: 0; color: var(--muc-2); }
.tt-pp .nut { margin: 6px 0 4px; }
.mau { margin-top: 72px; }
.mau h3 { font-size: 24px; }
.luoi-mau { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 22px; }
.o-mau { aspect-ratio: 9/16; max-height: 420px; border: 2px dashed var(--vien); border-radius: 22px; display: grid; place-items: center; text-align: center; color: var(--muc-2); font-size: 14px; background: repeating-linear-gradient(-45deg, transparent 0 14px, var(--nen-2) 14px 15px); }
.o-mau iframe { width: 100%; height: 100%; border: 0; border-radius: 20px; }

/* Hành động */
.vung-hd { background: var(--nhan); color: #fff; }
.vung-hd .mo-dau { color: var(--vang); }
.hd-luoi { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
.buoc { list-style: none; padding: 0; margin: 28px 0 0; counter-reset: b; }
.buoc li { counter-increment: b; display: grid; grid-template-columns: 40px 1fr; gap: 14px; margin-bottom: 18px; font-size: 17px; }
.buoc li::before { content: counter(b); width: 40px; height: 40px; border-radius: 50%; background: #fff; color: var(--nhan); font-weight: 800; display: grid; place-items: center; }
.nut-zalo { background: #fff; color: #0068ff; border-color: #fff; margin-top: 10px; }
.nut-zalo:hover { background: #e8f0ff; }

.don { background: var(--the); color: var(--muc); border-radius: 24px; padding: 30px; box-shadow: 0 24px 50px -20px rgba(0,0,0,.35); }
.don h3 { font-size: 22px; margin-bottom: 18px; }
.chon-goi { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }
.chon-goi label { border: 2px solid var(--vien); border-radius: 14px; padding: 12px 14px; cursor: pointer; display: block; }
.chon-goi input { position: absolute; opacity: 0; }
.chon-goi b { display: block; font-size: 15px; }
.chon-goi small { color: var(--muc-2); }
.chon-goi label:has(input:checked) { border-color: var(--nhan); background: var(--nhan-nhat); }
.chon-goi label:has(input:focus-visible) { outline: 3px solid var(--vang); }
.truong { display: block; margin-bottom: 14px; }
.truong span { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.truong input, .truong textarea { width: 100%; padding: 13px 14px; border: 2px solid var(--vien); border-radius: 12px; font: 16px var(--font); background: #fff; color: var(--muc); }
.truong input:focus, .truong textarea:focus { border-color: var(--muc); outline: none; }
.loi { color: #b3261e; font-weight: 600; min-height: 1.4em; margin: 6px 0 10px; }
.tom-tat { display: flex; justify-content: space-between; padding: 12px 0; border-top: 1px dashed var(--vien); margin-bottom: 14px; font-size: 15px; }
.don .nut-chinh { width: 100%; }

/* khối thanh toán */
.tt { display: grid; grid-template-columns: 240px 1fr; gap: 22px; align-items: start; }
.tt-qr { width: 240px; height: 240px; border-radius: 14px; border: 1px solid var(--vien); background: #fff; }
.tt-qr-trong { display: grid; place-items: center; text-align: center; padding: 20px; color: var(--muc-2); font-size: 14px; background: var(--nen); }
.tt-nhan { margin: 0; font-weight: 700; color: var(--muc-2); }
.tt-so-tien { margin: 0 0 10px; font-size: 34px; font-weight: 800; color: var(--nhan-dam); }
.tt dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0; font-size: 15px; }
.tt dt { color: var(--muc-2); }
.tt dd { margin: 0; font-weight: 600; word-break: break-all; }
.tt-ma { background: var(--vang); padding: 1px 8px; border-radius: 6px; }
.tt-cho { display: flex; gap: 8px; align-items: center; font-size: 14px; color: var(--muc-2); margin-top: 16px; }
.tt-cham { width: 10px; height: 10px; border-radius: 50%; background: var(--vang); animation: nhay 1s infinite; flex: none; }
.tt-xong { background: #e3f4ea; border: 2px solid var(--xanh); border-radius: 16px; padding: 20px; }
.tt-xong p { margin: 6px 0 0; }
.da-nhan { background: #e3f4ea; border: 2px solid var(--xanh); border-radius: 16px; padding: 18px; margin-bottom: 18px; }

/* FAQ + chân trang */
.hoi { max-width: 760px; }
.hoi details { border-bottom: 1px solid var(--vien); padding: 18px 0; }
.hoi summary { font-weight: 700; font-size: 18px; cursor: pointer; }
.hoi details p { color: var(--muc-2); margin: 10px 0 0; }
.cuoi { padding: 36px 0; border-top: 1px solid var(--vien); color: var(--muc-2); font-size: 14px; }
.cuoi .khung { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 900px) {
  .hero .khung, .hd-luoi { grid-template-columns: 1fr; }
  .hero { padding-top: 36px; }
  .dien-thoai { width: 240px; }
  .luoi-3, .bang-gia, .luoi-mau { grid-template-columns: 1fr; }
  .cam-ket, .cam-ket.cam-ket-3 { grid-template-columns: 1fr 1fr; }
  .goi.noi { box-shadow: 5px 5px 0 var(--muc); }
  .noi-that { grid-template-columns: 1fr; padding: 26px; }
  .tt { grid-template-columns: 1fr; }
  .tt-qr { margin-inline: auto; }
  .vung { padding: 64px 0; }
  .o-mau { max-height: 300px; aspect-ratio: auto; height: 220px; }
}
@media (max-width: 420px) {
  .chon-goi, .cam-ket, .cam-ket.cam-ket-3 { grid-template-columns: 1fr; }
  .don { padding: 22px; }
  .hero-nut .nut { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .phu-de span { opacity: 1; transform: none; }
}