@font-face { font-family: 'Chu'; src: url(/font/chu.ttf) format('truetype'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Chu'; src: url(/font/chu-dam.ttf) format('truetype'); font-weight: 700; font-display: swap; }
@font-face { font-family: 'Tieu'; src: url(/font/BeVietnamPro-ExtraBold.ttf) format('truetype'); font-weight: 800; font-display: swap; }
:root { --nen: #0E0D0B; --the: #1A1710; --the2: #221E14; --vang: #D9AE4F; --vang-sang: #F6DE8E; --vang-dam: #9A6A16; --chu: #F2ECDD; --mo: rgba(242,236,221,.68); --vien: rgba(217,174,79,.22); }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--nen); color: var(--chu); font: 400 17px/1.65 'Chu', system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--vang); }
.khung { max-width: 1080px; margin: 0 auto; padding: 0 22px; }
h1, h2, h3 { font-family: 'Tieu', 'Chu', sans-serif; font-weight: 800; line-height: 1.2; margin: 0; }
.vang { background: linear-gradient(180deg, var(--vang-sang), var(--vang) 60%, var(--vang-dam)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.dau { display: flex; align-items: center; gap: 12px; padding: 22px 0; }
.dau img { width: 38px; }
.dau b { font-family: 'Tieu'; letter-spacing: .06em; font-size: 15px; }
.dau span { display: block; font-size: 12px; color: var(--mo); letter-spacing: .08em; }
.hero { padding: 48px 0 70px; display: grid; grid-template-columns: 1.25fr .9fr; gap: 48px; align-items: center; }
.nhan { display: inline-block; padding: 6px 14px; border: 1px solid var(--vien); border-radius: 99px; font-size: 13px; color: var(--vang); letter-spacing: .04em; margin-bottom: 18px; }
.hero h1 { font-size: clamp(34px, 5.2vw, 56px); }
.hero p.lon { font-size: 19px; color: var(--mo); margin: 20px 0 30px; max-width: 560px; }
.nut { display: inline-flex; align-items: center; gap: 12px; padding: 18px 28px; border-radius: 14px; font: 700 18px 'Chu'; text-decoration: none; cursor: pointer; border: 0; }
.nut-chinh { background: linear-gradient(180deg, var(--vang-sang), var(--vang) 55%, var(--vang-dam)); color: #17130a; box-shadow: 0 10px 40px rgba(217,174,79,.25); }
.nut-chinh:hover { filter: brightness(1.06); }
.nut-phu { border: 1px solid var(--vien); color: var(--chu); background: transparent; font-size: 15px; padding: 12px 18px; }
.nho { font-size: 14px; color: var(--mo); }
.may { background: linear-gradient(160deg, #1d190f, #0f0e0b); border: 1px solid var(--vien); border-radius: 22px; padding: 22px; box-shadow: 0 30px 80px rgba(0,0,0,.5); }
.may .ba { display: grid; gap: 10px; }
.may .o { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border-radius: 14px; background: var(--the); border: 1px solid var(--vien); }
.may .o i { font-style: normal; width: 34px; height: 34px; flex: none; border-radius: 50%; display: grid; place-items: center; font-weight: 700; background: rgba(217,174,79,.14); color: var(--vang); }
.may .o.dang { border-color: var(--vang); }
.may .o.dang i { background: var(--vang); color: #17130a; }
.may .o b { display: block; font-size: 16px; }
.may .o span { font-size: 13px; color: var(--mo); }
.may .moc { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin-top: 16px; }
.may .moc div { height: 6px; border-radius: 3px; background: rgba(217,174,79,.18); }
.may .moc div.x { background: var(--vang); }
.may small { display: block; margin-top: 8px; color: var(--mo); font-size: 12px; }
section { padding: 70px 0; border-top: 1px solid rgba(217,174,79,.1); }
section h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 12px; }
section > .khung > p.phu { color: var(--mo); max-width: 680px; margin: 0 0 34px; }
.luoi { display: grid; gap: 16px; }
.l3 { grid-template-columns: repeat(3, 1fr); }
.l5 { grid-template-columns: repeat(5, 1fr); }
.the { background: var(--the); border: 1px solid var(--vien); border-radius: 18px; padding: 24px; }
.the h3 { font-size: 19px; margin: 12px 0 8px; }
.the p { margin: 0; color: var(--mo); font-size: 15px; }
.so { font-family: 'Tieu'; font-size: 30px; }
.moc-the { padding: 18px; }
.moc-the .so { font-size: 22px; }
.moc-the h3 { font-size: 16px; }
.moc-the p { font-size: 13px; }
.buoc { counter-reset: b; list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.buoc li { counter-increment: b; display: grid; grid-template-columns: 48px 1fr; gap: 16px; align-items: start; }
.buoc li::before { content: counter(b); width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; font: 800 20px 'Tieu'; color: #17130a; background: linear-gradient(180deg, var(--vang-sang), var(--vang)); }
.buoc b { display: block; font-size: 18px; margin-bottom: 2px; }
.buoc span { color: var(--mo); font-size: 15px; }
.chu-y { margin-top: 26px; padding: 18px 20px; border-radius: 14px; border: 1px dashed var(--vang-dam); background: rgba(217,174,79,.05); font-size: 15px; }
.chu-y b { color: var(--vang); }
.bang { width: 100%; border-collapse: collapse; font-size: 15px; }
.bang th, .bang td { padding: 14px 16px; border-bottom: 1px solid rgba(217,174,79,.12); text-align: left; vertical-align: top; }
.bang th { font: 800 15px 'Tieu'; color: var(--vang); }
.bang td:first-child { color: var(--mo); width: 26%; }
.ma { display: none; margin-top: 18px; padding: 14px 18px; border-radius: 14px; background: var(--the2); border: 1px solid var(--vang); font-size: 15px; }
.ma b { color: var(--vang); font-size: 17px; letter-spacing: .04em; }
.ma button { margin-left: 8px; padding: 6px 12px; font-size: 13px; }
.cuoi { padding: 80px 0; text-align: center; }
.cuoi h2 { font-size: clamp(28px, 4vw, 42px); margin-bottom: 16px; }
footer { padding: 30px 0 50px; border-top: 1px solid rgba(217,174,79,.1); color: var(--mo); font-size: 13px; }
footer p { margin: 6px 0; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; padding-top: 20px; } .l3 { grid-template-columns: 1fr; } .l5 { grid-template-columns: 1fr 1fr; } .bang td:first-child { width: 34%; } }

/* ---- phễu sau khi tải + trang nâng cấp ---- */
.sau-tai { display: none; margin-top: 22px; padding: 22px; border-radius: 18px; border: 1px solid var(--vang); background: linear-gradient(160deg, #221d10, #121009); }
.sau-tai.hien { display: block; }
.sau-tai h3 { font-size: 20px; margin-bottom: 6px; }
.viec3 { display: grid; gap: 10px; margin: 14px 0 6px; }
.viec3 a { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border-radius: 14px; background: var(--the); border: 1px solid var(--vien); text-decoration: none; color: var(--chu); }
.viec3 a:hover { border-color: var(--vang); }
.viec3 i { font-style: normal; width: 34px; height: 34px; flex: none; border-radius: 50%; display: grid; place-items: center; font-weight: 700; background: rgba(217,174,79,.14); color: var(--vang); }
.viec3 b { display: block; font-size: 16px; }
.viec3 span { font-size: 13px; color: var(--mo); }
.form { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--vien); }
.form .hang { display: flex; gap: 10px; flex-wrap: wrap; }
.form input[type=text], .form input[type=tel] { flex: 1; min-width: 160px; padding: 13px 14px; border-radius: 12px; border: 1px solid var(--vien); background: #0f0d09; color: var(--chu); font: 400 16px 'Chu'; }
.form label.dy { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; color: var(--mo); margin-top: 10px; }
.form .nut { padding: 13px 20px; font-size: 16px; }
.form .kq { margin-top: 10px; font-size: 14px; color: var(--vang); }
.thang { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.bac { position: relative; display: flex; flex-direction: column; gap: 8px; padding: 22px; border-radius: 18px; background: var(--the); border: 1px solid var(--vien); }
.bac .so-bac { font: 800 13px 'Tieu'; letter-spacing: .1em; color: var(--vang); }
.bac h3 { font-size: 19px; }
.bac .gia { font: 800 22px 'Tieu'; }
.bac p { margin: 0; font-size: 14px; color: var(--mo); flex: 1; }
.bac .nut { justify-content: center; font-size: 15px; padding: 12px 14px; margin-top: 8px; }
.bac.loi { border-color: var(--vang); box-shadow: 0 0 0 1px var(--vang) inset, 0 20px 60px rgba(217,174,79,.12); }
.bac.loi::before { content: 'SẢN PHẨM LÕI'; position: absolute; top: -11px; left: 18px; padding: 3px 10px; border-radius: 99px; background: var(--vang); color: #17130a; font: 800 11px 'Tieu'; letter-spacing: .08em; }
.ds { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.ds li { display: grid; grid-template-columns: 26px 1fr; gap: 10px; font-size: 15px; }
.ds li::before { content: '✦'; color: var(--vang); }
.ds li span { color: var(--mo); }
.l2 { grid-template-columns: 1fr 1fr; }
.hoi details { border-bottom: 1px solid rgba(217,174,79,.12); padding: 16px 0; }
.hoi summary { cursor: pointer; font: 700 17px 'Chu'; list-style: none; }
.hoi summary::after { content: '+'; float: right; color: var(--vang); }
.hoi details[open] summary::after { content: '–'; }
.hoi details p { color: var(--mo); margin: 10px 0 0; font-size: 15px; }
.chon-bac { display: grid; gap: 10px; }
.chon-bac div { display: grid; grid-template-columns: 200px 1fr; gap: 16px; padding: 14px 18px; border-radius: 14px; background: var(--the); border: 1px solid var(--vien); font-size: 15px; }
.chon-bac b { color: var(--vang); }
@media (max-width: 860px) { .thang, .l2 { grid-template-columns: 1fr; } .chon-bac div { grid-template-columns: 1fr; gap: 4px; } }