@font-face{font-family:Barlow;font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/barlow-vietnamese-400-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:Barlow;font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/barlow-latin-400-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Barlow;font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/barlow-vietnamese-500-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:Barlow;font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/barlow-latin-500-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Barlow;font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/barlow-vietnamese-600-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:Barlow;font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/barlow-latin-600-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:Barlow;font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/barlow-vietnamese-700-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:Barlow;font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/barlow-latin-700-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  --tg-white:#FFFFFF;
  --tg-ink:#0A0A0A;
  --tg-blue:#1C4380;
  --tg-blue-dark:#172944;
  --tg-blue-light:#E8ECF2;
  --tg-gray-text:#6B6B6B;
  --tg-gray-bg:#F5F7FA;
  --tg-err:#B3261E;
  --r:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:Barlow,system-ui,sans-serif;font-size:18px;line-height:1.55;color:var(--tg-ink);background:var(--tg-white)}
@media (min-width:900px){body{font-size:19px}}
img,svg{display:block;max-width:100%}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(32px,8.5vw,54px)}
h2{font-size:clamp(27px,6.5vw,40px)}
h3{font-size:21px;font-weight:600}
p{margin:0 0 .8em}
a{color:var(--tg-blue)}
strong{font-weight:600}
[hidden]{display:none!important}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px}
:focus-visible{outline:3px solid var(--tg-blue);outline-offset:2px}

/* chế độ open / waitlist, trả góp, tập ở nhà */
html[data-mode=open] .only-waitlist,html[data-mode=waitlist] .only-open{display:none!important}
html[data-installment=off] .if-installment,html[data-installment=on] .if-no-installment{display:none!important}
html[data-home=no] .if-home,html[data-home=yes] .if-nohome{display:none!important}

/* nút */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 24px;border-radius:var(--r);background:var(--tg-blue);color:#fff;font:700 18px/1.2 Barlow,sans-serif;text-decoration:none;border:0;cursor:pointer;text-align:center}
.btn:hover,.btn:active{background:var(--tg-blue-dark)}
.btn-sm{min-height:44px;padding:8px 18px;font-size:16px}
.btn-lg{min-height:56px;padding:14px 28px;font-size:20px}
.btn-block{width:100%}
.btn-ghost{background:#fff;color:var(--tg-blue);border:2px solid var(--tg-blue)}
.btn-ghost:hover{background:var(--tg-blue-light)}
.btn[disabled]{opacity:.6;cursor:wait}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid #e6e8ec}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.logo img{width:168px;height:auto}
@media (min-width:600px){.logo img{width:208px}}

/* hero */
.hero{padding:36px 0 48px}
.hero-in{display:grid;gap:32px;align-items:center}
@media (min-width:900px){.hero{padding:64px 0 80px}.hero-in{grid-template-columns:1.25fr 1fr;gap:56px}}
.eyebrow{font-size:14px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--tg-blue);margin-bottom:12px}
.hl{color:var(--tg-blue)}
.lead{font-size:19px;color:#2a2a2a}
.slots{display:table;background:var(--tg-gray-bg);border:1px solid #dfe3ea;border-radius:999px;padding:6px 16px;font-size:17px;margin:4px 0 20px}
.slots strong{color:var(--tg-blue);font-weight:700}
.dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--tg-blue);margin-right:8px;vertical-align:1px}
.dot-off{background:var(--tg-gray-text)}
.note{font-size:16px;color:var(--tg-gray-text);margin-top:12px}

/* khung ảnh tạm */
.ph{background:var(--tg-gray-bg);border:1px dashed #c9cfd8;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:var(--tg-gray-text);aspect-ratio:4/5;width:100%}
.ph svg{width:56px;height:56px;color:var(--tg-blue)}
.ph-hero{max-width:420px;justify-self:center}
.hero-photo{border-radius:16px;width:100%;height:auto;max-width:420px;justify-self:center}

/* section */
.sec{padding:56px 0}
@media (min-width:900px){.sec{padding:88px 0}}
.alt{background:var(--tg-gray-bg)}
.small{font-size:15px;color:var(--tg-gray-text)}
.center{text-align:center}

.ticks{list-style:none;padding:0;margin:0}
.ticks li{position:relative;padding:10px 0 10px 36px;border-bottom:1px solid #e6e8ec}
.ticks li:last-child{border-bottom:0}
.ticks svg{position:absolute;left:0;top:13px;width:24px;height:24px;color:var(--tg-blue)}
.crosses svg{color:var(--tg-ink)}

.grid3{display:grid;gap:16px}
@media (min-width:800px){.grid3{grid-template-columns:repeat(3,1fr);gap:24px}}
.card{background:#fff;border:1px solid #e1e5ec;border-radius:14px;padding:24px}
.card .num{font-size:40px;font-weight:700;color:var(--tg-blue);line-height:1;margin-bottom:12px}
.pillar{padding:8px 0}
.pillar .ico{width:44px;height:44px;color:var(--tg-blue);margin-bottom:12px}

.timeline{list-style:none;padding:0;margin:0;border-left:2px solid var(--tg-blue);margin-left:8px}
.timeline li{position:relative;padding:0 0 24px 24px}
.timeline li:before{content:"";position:absolute;left:-8px;top:6px;width:14px;height:14px;border-radius:50%;background:#fff;border:3px solid var(--tg-blue)}
.timeline li:last-child{padding-bottom:0}
.timeline li:last-child:before{background:var(--tg-blue)}
.tl-when{font-weight:700;color:var(--tg-blue);margin:0 0 2px;font-size:17px;letter-spacing:.04em;text-transform:uppercase}

/* hợp / chưa hợp: khối đặc viền xanh vs khối chỉ có viền đen */
.fit{display:grid;gap:16px}
@media (min-width:800px){.fit{grid-template-columns:1fr 1fr;gap:24px}}
.fit-col{border-radius:14px;padding:24px}
.fit-yes{background:#fff;border:2px solid var(--tg-blue)}
.fit-no{background:transparent;border:2px dashed #9aa1ab}

.tcard{background:var(--tg-gray-bg);border-radius:14px;padding:24px}
.tcard img{width:64px;height:64px;border-radius:50%;object-fit:cover;margin-bottom:12px}
.tcard .who{font-weight:600;margin:0}
.tcard .meta{font-size:15px;color:var(--tg-gray-text)}

.about{display:grid;gap:28px;align-items:center}
@media (min-width:800px){.about{grid-template-columns:340px 1fr;gap:56px}}
.ph-about{max-width:340px}

/* giá */
.price{background:var(--tg-blue-light);border:2px solid var(--tg-blue);border-radius:18px;padding:32px 22px;text-align:center}
@media (min-width:600px){.price{padding:44px}}
.price-big{font-size:clamp(44px,12vw,64px);font-weight:700;color:var(--tg-blue);line-height:1;margin:4px 0 10px}
.price-big small{display:block;margin-top:8px;font-size:20px;color:var(--tg-ink);font-weight:500}
.price-sub{font-size:18px;font-weight:500;margin-bottom:6px}
.price-cmp{margin:18px auto;max-width:560px;color:#2a2a2a}
.guarantee{display:flex;gap:14px;text-align:left;background:#fff;border-radius:12px;padding:18px;margin:20px 0 14px}
.guarantee svg{width:36px;height:36px;flex:none;color:var(--tg-blue)}
.guarantee p:last-child{margin:0}
.noupsell{font-weight:600;margin-bottom:22px}

.steps{list-style:none;padding:0;margin:0;display:grid;gap:14px}
@media (min-width:800px){.steps{grid-template-columns:repeat(4,1fr)}}
.steps li{display:flex;gap:14px;align-items:flex-start;background:var(--tg-gray-bg);border-radius:12px;padding:18px}
.steps span{flex:none;width:36px;height:36px;border-radius:50%;background:var(--tg-blue);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center}
.steps p{margin:4px 0 0}

.faq details{background:#fff;border:1px solid #e1e5ec;border-radius:12px;margin-bottom:10px}
.faq summary{cursor:pointer;padding:16px 48px 16px 18px;font-weight:600;list-style:none;position:relative;min-height:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:18px;top:12px;font-size:26px;color:var(--tg-blue);font-weight:500}
.faq details[open] summary:after{content:"–"}
.faq details p{padding:0 18px 4px;margin-bottom:14px}

/* form */
.form-sec{background:var(--tg-blue-light)}
#apply{background:#fff;border-radius:18px;padding:24px 18px;margin-top:20px}
@media (min-width:600px){#apply{padding:36px}}
.f{border:0;padding:0;margin:0 0 26px;min-width:0}
.f>label,.f legend{display:block;font-weight:600;margin-bottom:10px;padding:0}
.f small{font-weight:400;color:var(--tg-gray-text)}
.sub{font-size:15px;color:var(--tg-gray-text);margin:6px 0 8px}
input[type=text],input[type=tel],input[type=number]{width:100%;min-height:52px;padding:12px 14px;font:inherit;font-size:18px;border:1.5px solid #b9c0ca;border-radius:var(--r);background:#fff;color:var(--tg-ink)}
input:focus{border-color:var(--tg-blue);outline:2px solid var(--tg-blue);outline-offset:0}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opts label{position:relative}
.opts input{position:absolute;opacity:0;width:1px;height:1px}
.opts span{display:flex;align-items:center;min-height:48px;padding:10px 16px;border:1.5px solid #b9c0ca;border-radius:var(--r);cursor:pointer;background:#fff;font-size:17px;user-select:none}
.opts input:checked+span{background:var(--tg-blue);border-color:var(--tg-blue);color:#fff;font-weight:600}
.opts input:focus-visible+span{outline:3px solid var(--tg-blue);outline-offset:2px}
.other{margin-top:10px;display:none}
.other.show{display:block}
.err{color:var(--tg-err);font-size:16px;font-weight:500;margin:6px 0 0;min-height:0}
.err:empty{display:none}
.f.bad input[type=text],.f.bad input[type=tel],.f.bad input[type=number]{border-color:var(--tg-err)}
.consent{display:flex;gap:12px;align-items:flex-start;font-size:16px;cursor:pointer}
.consent input{width:24px;height:24px;flex:none;margin-top:2px;accent-color:var(--tg-blue)}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.cf-turnstile{margin:18px 0 8px;min-height:65px}
.send-err{background:#fdecea;border-radius:12px;padding:16px;margin-top:14px}
.send-err .btn{margin-top:4px}

/* footer */
.foot{background:var(--tg-ink);color:#d9d9d9;padding:48px 0 120px;font-size:16px}
.foot img{width:200px;height:auto;margin-bottom:16px}
.foot a{color:#fff}
.tag{letter-spacing:.14em;text-transform:uppercase;font-weight:500;font-size:14px}
.social a{margin-right:18px;display:inline-block;padding:10px 0}
.disc{color:#b3b3b3;font-size:14px}

/* thanh đăng ký dính đáy (chỉ điện thoại) + nút Zalo */
.sticky{position:fixed;left:0;right:0;bottom:0;z-index:30;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.97);border-top:1px solid #e1e5ec;transform:translateY(110%);transition:transform .25s}
.sticky.on{transform:none}
@media (min-width:900px){.sticky{display:none}}
.zalo-fab{position:fixed;right:16px;bottom:16px;z-index:31;width:56px;height:56px;border-radius:50%;background:#fff;color:var(--tg-blue);border:2px solid var(--tg-blue);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;text-decoration:none;box-shadow:0 2px 10px rgba(0,0,0,.12);transition:bottom .25s}
body.sticky-on .zalo-fab{bottom:calc(84px + env(safe-area-inset-bottom))}
@media (min-width:900px){body.sticky-on .zalo-fab{bottom:16px}}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.sticky,.zalo-fab{transition:none}}

/* trang phụ */
.page{padding:48px 0 80px}
.page h1{font-size:clamp(30px,7vw,44px)}
.page h2{font-size:24px;margin-top:1.4em}
.box{background:var(--tg-gray-bg);border-radius:14px;padding:22px;margin:20px 0}