:root{
  --nền:#FAF8F4;   --bơ:#F3EBD6;   --giấy:#FFFFFF;
  --mực:#19211F;   --mực-nhạt:#5C6866;  --nhãn:#92A09D;
  --viền:rgba(25,33,31,.12);  --viền-đậm:rgba(25,33,31,.22);
  --xanh:#0E7F85;  --xanh-đậm:#0A6066;  --xanh-mờ:#E6F1F1;
  --bóng:rgba(16,40,38,.16);
  --r:4px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --nền:#101614;  --bơ:#1C2320;  --giấy:#19211F;
    --mực:#EDF2F0;  --mực-nhạt:#AFBFBB;  --nhãn:#7F908C;
    --viền:rgba(237,242,240,.15); --viền-đậm:rgba(237,242,240,.3);
    --xanh:#4FB9BE;  --xanh-đậm:#4FB9BE;  --xanh-mờ:#13302F;
    --bóng:rgba(0,0,0,.55);
  }
}
:root[data-theme="dark"]{
  --nền:#101614;  --bơ:#1C2320;  --giấy:#19211F;
  --mực:#EDF2F0;  --mực-nhạt:#AFBFBB;  --nhãn:#7F908C;
  --viền:rgba(237,242,240,.15); --viền-đậm:rgba(237,242,240,.3);
  --xanh:#4FB9BE;  --xanh-đậm:#4FB9BE;  --xanh-mờ:#13302F;
  --bóng:rgba(0,0,0,.55);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--nền);color:var(--mực);
  font-family:"Be Vietnam Pro",system-ui,-apple-system,sans-serif;
  font-size:16.5px;line-height:1.72;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
p{margin:0}
h1,h2,h3{margin:0;font-family:Lora,Georgia,serif;font-weight:500;line-height:1.2;text-wrap:balance;letter-spacing:-.005em}
:focus-visible{outline:2px solid var(--xanh);outline-offset:3px}

.khung{max-width:1120px;margin:0 auto;padding:0 24px}
.mắt{font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--nhãn)}

/* ─────── thanh trên ─────── */
.đỉnh{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--nền) 90%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--viền)}
.đỉnh .trong{display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:14px 24px;max-width:1120px;margin:0 auto}
.hiệu{display:block;line-height:0}
.hiệu img{height:36px;width:auto}
.đỉnh nav{display:none;gap:26px;font-size:14.5px}
.đỉnh nav a{text-decoration:none;color:var(--mực-nhạt)}
.đỉnh nav a:hover{color:var(--xanh)}
@media(min-width:860px){.đỉnh nav{display:flex}}
.nút{display:inline-block;background:var(--xanh);color:#fff;text-decoration:none;
  font-weight:600;font-size:14.5px;padding:11px 22px;border-radius:999px;white-space:nowrap;border:none;cursor:pointer}
.nút:hover{background:var(--xanh-đậm)}
.nút.trắng{background:var(--giấy);color:var(--xanh-đậm)}
.nút.viền{background:transparent;color:var(--mực);border:1px solid var(--viền-đậm)}

/* ─────── mở đầu: ảnh phủ kín + phiếu hỏi việc ─────── */
.mở{position:relative}
.mở .ảnh{position:relative;height:clamp(440px,64vh,620px);overflow:hidden}
.mở .ảnh img{width:100%;height:100%;object-fit:cover}
.mở .phủ{position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,26,25,.52) 0%,rgba(10,26,25,.30) 42%,rgba(10,26,25,.70) 100%)}
.mở .chữ{position:absolute;inset:0;display:flex;align-items:center;padding-bottom:104px}
@media(max-width:620px){.mở .chữ{padding-bottom:0;align-items:flex-start;padding-top:46px}}
.mở.con .chữ{padding-bottom:104px}
.mở .chữ .khung{width:100%}
.mở h1{color:#fff;font-size:clamp(33px,5.4vw,58px);max-width:17ch;font-weight:500}
.mở .dẫn{color:rgba(255,255,255,.93);margin-top:16px;max-width:52ch;font-size:clamp(16px,1.9vw,18.5px)}
.mở .mắt{color:rgba(255,255,255,.78);display:block;margin-bottom:14px}

.phiếu{background:var(--giấy);border:1px solid var(--viền);border-radius:10px;
  box-shadow:0 26px 54px -30px var(--bóng);padding:22px 22px 24px;
  max-width:1120px;margin:-70px auto 0;position:relative;z-index:5}
@media(min-width:900px){.phiếu{margin:-78px 24px 0}}
.phiếu .tiêu{display:flex;align-items:baseline;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:16px}
.phiếu h2{font-size:21px}
.phiếu .tiêu span{font-size:14px;color:var(--mực-nhạt)}
.ô-lưới{display:grid;gap:13px;grid-template-columns:1fr}
@media(min-width:620px){.ô-lưới{grid-template-columns:1fr 1fr}}
@media(min-width:940px){.ô-lưới{grid-template-columns:repeat(4,1fr) auto;align-items:end}}
.ô{display:flex;flex-direction:column;gap:6px}
.ô label{font-size:12.5px;font-weight:600;color:var(--mực-nhạt);letter-spacing:.02em}
.ô select,.ô input{font:inherit;font-size:15px;padding:10px 12px;border:1px solid var(--viền-đậm);
  border-radius:7px;background:var(--nền);color:var(--mực);width:100%}
.kq{margin-top:16px;border:1px solid var(--viền);background:var(--xanh-mờ);border-radius:8px;
  padding:16px 18px;display:none;flex-direction:column;gap:7px}
.kq.hien{display:flex}
.kq b{font-size:16px}
.kq .tt{font-size:14.5px;color:var(--mực-nhạt)}
.kq .tt i{font-style:normal;color:var(--mực);font-weight:600}
.phiếu .nhắc{margin-top:14px;font-size:13.5px;color:var(--nhãn)}

/* ─────── dải khách hàng ─────── */
.khách{padding:34px 0 10px}
.khách .trong{display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px}
.khách .nhãn-k{font-size:13px;color:var(--nhãn);letter-spacing:.08em;text-transform:uppercase;font-weight:600}
.khách b{font-family:Lora,Georgia,serif;font-weight:500;font-size:clamp(16px,2vw,19px);color:var(--mực)}
.khách .gạch{width:1px;height:18px;background:var(--viền-đậm)}

/* ─────── khối ─────── */
.khối{padding:62px 0}
.khối.bơ{background:var(--bơ)}
.đầu-khối{max-width:60ch;display:flex;flex-direction:column;gap:12px;margin-bottom:34px}
.đầu-khối h2{font-size:clamp(26px,3.9vw,38px)}
.đầu-khối p{color:var(--mực-nhạt)}

/* ba nhóm khách */
.ba{display:grid;gap:1px;background:var(--viền);border:1px solid var(--viền);border-radius:10px;overflow:hidden}
@media(min-width:820px){.ba{grid-template-columns:repeat(3,1fr)}}
.ai{background:var(--giấy);display:flex;flex-direction:column}
.ai > img{width:100%;height:188px;object-fit:cover}
.ai .trong-ai{padding:24px 24px 28px;display:flex;flex-direction:column;gap:11px;flex:1}
.ai .mắt{color:var(--xanh)}
.ai h3{font-size:22px}
.ai p{font-size:15.5px;color:var(--mực-nhạt)}
.ai ul{margin:4px 0 0;padding-left:18px;font-size:15px;color:var(--mực-nhạt);display:flex;flex-direction:column;gap:5px}

/* chương trình */
.ct{display:grid;gap:26px}
@media(min-width:880px){.ct{grid-template-columns:1fr 1fr}}
.ctm{background:var(--giấy);border:1px solid var(--viền);border-radius:10px;overflow:hidden;display:flex;flex-direction:column}
.ctm img{width:100%;height:230px;object-fit:cover}
.ctm .ruột{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.ctm h3{font-size:24px}
.ctm p{font-size:15.5px;color:var(--mực-nhạt)}
.ctm .bảng{margin-top:auto;display:flex;flex-direction:column;gap:8px;padding-top:14px;border-top:1px solid var(--viền)}
.ctm .d{display:flex;justify-content:space-between;gap:14px;font-size:14.5px}
.ctm .d span:first-child{color:var(--nhãn)}
.ctm .d span:last-child{text-align:right;color:var(--mực)}

/* quy trình */
.qt{display:grid;gap:1px;background:var(--viền);border-top:1px solid var(--viền);border-bottom:1px solid var(--viền)}
@media(min-width:820px){.qt{grid-template-columns:repeat(4,1fr)}}
.q{background:var(--nền);padding:24px 20px;display:flex;flex-direction:column;gap:8px}
.khối.bơ .q{background:var(--bơ)}
.q .số{font-family:Lora,Georgia,serif;font-size:30px;color:var(--xanh);line-height:1}
.q b{font-weight:600;font-size:16.5px}
.q span{font-size:14.5px;color:var(--mực-nhạt)}

/* dải ảnh */
.dải{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media(min-width:820px){.dải{grid-template-columns:repeat(3,1fr)}}
.dải img{width:100%;height:clamp(150px,22vw,260px);object-fit:cover;border-radius:6px;transition:transform .35s ease}
.dải img:hover{transform:scale(1.03)}

/* bộ kit */
.kit{display:grid;gap:30px;align-items:center}
@media(min-width:860px){.kit{grid-template-columns:1fr 1fr}}
.kit img{border-radius:8px;box-shadow:0 20px 44px -30px var(--bóng)}
.kit .chữ{display:flex;flex-direction:column;gap:14px}
.kit h2{font-size:clamp(25px,3.6vw,34px)}
.kit p{color:var(--mực-nhạt)}

/* bài viết */
.bài{display:grid;gap:18px}
@media(min-width:820px){.bài{grid-template-columns:repeat(3,1fr)}}
.bv{text-decoration:none;display:flex;flex-direction:column;gap:9px;padding-top:16px;border-top:2px solid var(--mực)}
.bv .mắt{color:var(--xanh)}
.bv b{font-family:Lora,Georgia,serif;font-weight:500;font-size:19px;line-height:1.32}

/* liên hệ */
.lh{background:var(--xanh);color:#fff;border-radius:10px;padding:40px 30px;
  display:grid;gap:22px;align-items:center}
@media(min-width:860px){.lh{grid-template-columns:1.15fr 1fr;padding:48px 44px}}
.lh h2{font-size:clamp(26px,3.6vw,36px);color:#fff}
.lh p{margin-top:12px;opacity:.93;max-width:46ch}
.lh .hộp{display:flex;flex-direction:column;gap:11px}
.thiếu{display:inline-block;background:rgba(255,255,255,.16);border:1px dashed rgba(255,255,255,.6);
  border-radius:6px;padding:6px 12px;font-size:14px;font-weight:600}

/* chân */
.chân{border-top:1px solid var(--viền);margin-top:62px;padding:30px 0 50px;
  display:flex;flex-direction:column;gap:7px;color:var(--mực-nhạt);font-size:14.5px}
.chân b{color:var(--mực);font-weight:600}

/* ── trang con: ảnh mở đầu thấp hơn ── */
.mở.con .ảnh{height:clamp(300px,42vh,420px)}
.mở.con h1{font-size:clamp(29px,4.6vw,46px)}
.đỉnh nav a.dang{color:var(--xanh);font-weight:600}
.đầu-khối.rộng{max-width:68ch}

/* ── khối điểm khác biệt ── */
.khối.vip{background:var(--xanh-mờ)}
.khối.vip .mắt{color:var(--xanh)}
.sáu{display:grid;gap:14px}
@media(min-width:720px){.sáu{grid-template-columns:repeat(3,1fr)}}
.s{background:var(--giấy);border:1px solid var(--viền);border-radius:12px;
  padding:24px 20px 26px;display:flex;flex-direction:column;gap:8px;
  box-shadow:0 10px 26px -22px var(--bóng);transition:transform .25s ease,box-shadow .25s ease}
.s:hover{transform:translateY(-4px);box-shadow:0 18px 34px -24px var(--bóng)}
.s .ic{width:40px;height:40px;color:var(--xanh);margin-bottom:4px}
.s b{font-family:Lora,Georgia,serif;font-weight:500;font-size:19px}
.s span{font-size:14.5px;color:var(--mực-nhạt)}

/* ── hiện dần khi cuộn tới ── */
.hien-dan{opacity:0;transform:translateY(16px);transition:opacity .55s ease,transform .55s ease}
.hien-dan.toi{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .hien-dan{opacity:1;transform:none;transition:none}
  .s:hover{transform:none}
}

/* ── ba khối ngang ── */
.ba-ngang{display:grid;gap:26px}
@media(min-width:820px){.ba-ngang{grid-template-columns:repeat(3,1fr)}}
.n{display:flex;flex-direction:column;gap:9px;padding-top:16px;border-top:2px solid var(--xanh)}
.n h3{font-size:20px}
.n p{font-size:15.5px;color:var(--mực-nhạt)}

/* ── bảng thủ tục ── */
.hỏi{display:grid;gap:1px;background:var(--viền);border:1px solid var(--viền);border-radius:10px;overflow:hidden}
@media(min-width:760px){.hỏi{grid-template-columns:1fr 1fr}}
.h{background:var(--giấy);padding:22px 22px 24px;display:flex;flex-direction:column;gap:6px}
.h b{font-family:Lora,Georgia,serif;font-weight:500;font-size:19px}
.h span{font-size:15px;color:var(--mực-nhạt)}

/* ── danh sách chương trình ── */
.ds{display:grid;gap:1px;background:var(--viền);border:1px solid var(--viền);border-radius:10px;overflow:hidden}
.mụcct{background:var(--giấy);padding:24px;display:grid;gap:14px}
@media(min-width:800px){.mụcct{grid-template-columns:200px 1fr 220px;align-items:start;gap:26px}}
.mụcct h3{font-size:21px}
.mụcct .mô{font-size:15.5px;color:var(--mực-nhạt)}
.mụcct .ts{display:flex;flex-direction:column;gap:5px;font-size:14px}
.mụcct .ts div{display:flex;justify-content:space-between;gap:10px}
.mụcct .ts span:first-child{color:var(--nhãn)}
.mùa{display:inline-block;font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--xanh);background:var(--xanh-mờ);padding:4px 10px;border-radius:999px;margin-top:6px}

/* ── danh sách bài viết ── */
.dsbv{display:grid;gap:1px;background:var(--viền);border-top:1px solid var(--viền);border-bottom:1px solid var(--viền)}
@media(min-width:760px){.dsbv{grid-template-columns:1fr 1fr}}
.bvd{cursor:default;background:var(--nền);padding:18px 20px;text-decoration:none;display:flex;flex-direction:column;gap:4px}
.khối.bơ .bvd{background:var(--bơ)}
.bvd b{font-family:Lora,Georgia,serif;font-weight:500;font-size:17px;line-height:1.36}
.bvd span{font-size:12.5px;color:var(--nhãn)}
.xem{margin-top:auto;padding-top:10px;font-size:14.5px;font-weight:600;color:var(--xanh);text-decoration:none}
.xem:hover{text-decoration:underline}
.ai .trong-ai{min-height:0}
.lh .số{font-family:Lora,Georgia,serif;font-size:clamp(26px,3.4vw,34px);color:#fff;text-decoration:none;line-height:1.1}
.lh .thư{color:rgba(255,255,255,.92);text-decoration:none;font-size:15.5px;border-bottom:1px solid rgba(255,255,255,.4);align-self:flex-start}
.phiếu .nhắc b{color:var(--mực)}

/* ── cặp ảnh trong khối VIP ── */
.cặp-ảnh{display:grid;gap:12px;margin-bottom:22px}
@media(min-width:720px){.cặp-ảnh{grid-template-columns:repeat(3,1fr)}
.cặp-ảnh.hai{grid-template-columns:1fr 1fr}}
.cặp-ảnh img{width:100%;height:clamp(220px,28vw,330px);object-fit:cover;border-radius:8px}

/* ── lợi ích & dịp dùng ── */
.loi-ich{margin-top:24px;display:flex;flex-direction:column;gap:9px}
.nhan-li{font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--xanh)}
.li-hang{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}
.li-hang span{border:1px solid var(--viền-đậm);border-radius:999px;background:var(--giấy);
  padding:7px 15px;font-size:14.5px;color:var(--mực)}

/* ── chương trình theo mùa ── */
.mua{display:grid;gap:22px}
@media(min-width:760px){.mua{grid-template-columns:1fr 1fr}}
.mc{background:var(--giấy);border:1px solid var(--viền);border-radius:12px;overflow:hidden;
  display:flex;flex-direction:column;box-shadow:0 12px 30px -24px var(--bóng);
  transition:transform .25s ease,box-shadow .25s ease}
.mc:hover{transform:translateY(-4px);box-shadow:0 20px 38px -26px var(--bóng)}
.mc img{width:100%;height:208px;object-fit:cover}
.mc .ruột-m{padding:20px 22px 24px;display:flex;flex-direction:column;gap:11px;flex:1}
.mc .khi{display:inline-flex;align-self:flex-start;align-items:center;gap:7px;font-size:11.5px;
  font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--xanh);
  background:var(--xanh-mờ);padding:5px 12px;border-radius:999px}
.mc h3{font-size:23px}
.mc > .ruột-m > p{font-size:15.5px;color:var(--mực-nhạt)}
.mc ul{margin:2px 0 0;padding-left:18px;display:flex;flex-direction:column;gap:5px;
  font-size:15px;color:var(--mực-nhạt)}
.mc .day{margin-top:auto;padding-top:14px;border-top:1px solid var(--viền);display:flex;
  justify-content:space-between;gap:12px;font-size:14px}
.mc .day span:first-child{color:var(--nhãn)}

/* ── băng ảnh ngang ── */
.bang-anh{margin:0;height:clamp(200px,30vw,330px);overflow:hidden}
.bang-anh img{width:100%;height:100%;object-fit:cover}

/* hai nut gui yeu cau */
.gui{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 4px}
.nút.phụ{background:transparent;color:var(--xanh);box-shadow:inset 0 0 0 1.5px var(--xanh)}
.nút.phụ:hover{background:var(--xanh);color:#fff}

.chân .lh-chan a{color:var(--xanh);text-decoration:none;border-bottom:1px solid currentColor}

/* nút nổi liên hệ nhanh */
.nut-noi{position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px}
.nn{display:flex;align-items:center;gap:0;width:50px;height:50px;border-radius:999px;
    color:#fff;text-decoration:none;box-shadow:0 8px 22px -8px rgba(0,0,0,.45);
    overflow:hidden;transition:width .28s ease,gap .28s ease;padding-left:13px}
.nn svg{width:24px;height:24px;flex:0 0 24px}
.nn span{white-space:nowrap;opacity:0;font-size:14px;font-weight:600;transition:opacity .2s ease}
.nn:hover,.nn:focus-visible{width:146px;gap:9px}
.nn:hover span,.nn:focus-visible span{opacity:1}
.nn-goi{background:#0E7F85}
.nn-zalo{background:#0068FF}
.nn-fb{background:#0084FF}
@media(max-width:620px){.nut-noi{right:12px;bottom:12px}.nn{width:46px;height:46px;padding-left:11px}}
@media(prefers-reduced-motion:reduce){.nn{transition:none}}

/* dòng tên khách hàng doanh nghiệp */
.kh-ds{text-align:center;font-size:1.05rem;line-height:2;color:#0E7F85;font-weight:600;
  max-width:52rem;margin:0 auto;letter-spacing:.01em}
@media(max-width:640px){.kh-ds{font-size:.95rem;line-height:1.9}}