/* ══════════════════════════════════════════════════════════════════════
   KHOA TRÍ — Design System  ·  phiên bản "thanh tao"
   Chữ: Manrope (không chân) cho toàn bộ site
   Màu nền tảng lấy từ logo: xanh #3B69B4
   ══════════════════════════════════════════════════════════════════════ */

/* ── reset ─────────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,svg,video,canvas{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* ── tokens ────────────────────────────────────────────────────────── */
:root{
  /* thang xanh dựng từ màu logo #3B69B4 */
  --b50:#F2F6FC; --b100:#E2EAF7; --b200:#C6D6EF; --b300:#9CB8E3;
  --b400:#6791D5; --b500:#3B69B4; --b600:#31589A; --b700:#27477D;
  --b800:#1D3560; --b900:#152741;

  --brand:var(--b500);
  --brand-deep:var(--b700);
  --brand-soft:var(--b50);

  --teal:#0F9C89; --teal-soft:#E8F5F2;
  --amber:#C98A12; --amber-soft:#FBF3E2;
  --rose:#C5455C; --rose-soft:#FAEDEF;

  --ink:#111A2B;
  --ink-2:#4A566E;
  --ink-3:#7C8798;
  --line:#E7EBF2;
  --line-2:#F1F4F9;
  --bg:#FDFDFE;
  --bg-2:#F5F7FB;
  --bg-3:#EBEFF7;
  --card:#FFFFFF;

  /* bóng đổ mảnh, gần như chỉ gợi ý độ sâu */
  --e1:0 1px 2px rgba(17,26,43,.035);
  --e2:0 1px 3px rgba(17,26,43,.04), 0 12px 28px -18px rgba(17,26,43,.18);
  --e3:0 2px 6px rgba(17,26,43,.045), 0 28px 60px -30px rgba(17,26,43,.26);

  --font:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-display:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"JetBrains Mono","Cascadia Mono",Consolas,ui-monospace,monospace;

  --wrap:1180px;
  --pad:clamp(20px,5vw,44px);
  --r-sm:8px; --r:12px; --r-lg:16px; --r-xl:22px;
  --head-h:80px;
}

html[data-theme="dark"]{
  --b50:#131E30; --b100:#182640;
  --brand:#8FB1E8; --brand-deep:#B4CCF3; --brand-soft:#16233A;
  --teal:#4ACFB8; --teal-soft:#0E2926;
  --amber:#E6B45A; --amber-soft:#2A2114;
  --rose:#E88298; --rose-soft:#2C1820;

  --ink:#ECF0F6;
  --ink-2:#A7B2C4;
  --ink-3:#7C8799;
  --line:#232E42;
  --line-2:#1B2537;
  --bg:#0B111C;
  --bg-2:#0F1725;
  --bg-3:#141E30;
  --card:#111926;

  --e1:0 1px 2px rgba(0,0,0,.35);
  --e2:0 1px 3px rgba(0,0,0,.4), 0 14px 30px -18px rgba(0,0,0,.7);
  --e3:0 2px 6px rgba(0,0,0,.4), 0 30px 62px -30px rgba(0,0,0,.85);
}

/* ── nền chữ ───────────────────────────────────────────────────────── */
body{
  font-family:var(--font);
  font-size:16px; line-height:1.78; font-weight:400;
  color:var(--ink-2); background:var(--bg);
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
::selection{background:#D9E4F5;color:#152741}
html[data-theme="dark"] ::selection{background:#27477D;color:#ECF0F6}
:focus-visible{outline:1.5px solid var(--brand);outline-offset:3px;border-radius:3px}

h1,h2,h3{
  font-family:var(--font-display);
  color:var(--ink);font-weight:600;
  /* cân bằng số chữ giữa các dòng — không để một từ rơi lẻ xuống dòng cuối */
  text-wrap:balance;
}
h1{font-size:clamp(2.2rem,1.45rem + 2.75vw,3.35rem);line-height:1.16;letter-spacing:-.026em}
h2{font-size:clamp(1.68rem,1.22rem + 1.75vw,2.4rem);line-height:1.22;letter-spacing:-.022em}
h3{font-size:clamp(1.12rem,1.04rem + .42vw,1.32rem);line-height:1.42;letter-spacing:-.012em}
h4,h5{
  font-family:var(--font-display);color:var(--ink);
  font-weight:700;letter-spacing:-.006em;line-height:1.45;text-wrap:balance;
}
h4{font-size:1rem}
p{color:var(--ink-2)}
strong{color:var(--ink);font-weight:600}
em{font-style:italic}

.lead{
  font-size:clamp(1.02rem,.98rem + .28vw,1.15rem);color:var(--ink-2);
  line-height:1.82;font-weight:400;text-wrap:pretty;
}
/* không để dòng cuối của đoạn văn chỉ còn một từ */
p,li,figcaption{text-wrap:pretty}
.small{font-size:.875rem;line-height:1.7}
.muted{color:var(--ink-3)}
.grad-text{
  background:linear-gradient(96deg,#3B69B4,#6791D5 55%,#0F9C89);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
html[data-theme="dark"] .grad-text{
  background:linear-gradient(96deg,#9CB8E3,#8FB1E8 50%,#4ACFB8);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ── bố cục ────────────────────────────────────────────────────────── */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.wrap-lg{max-width:1320px}
.wrap-sm{max-width:840px}
.section{padding-block:clamp(70px,8vw,128px)}
.section-sm{padding-block:clamp(48px,5.5vw,80px)}
.section-tint{background:var(--bg-2)}
.section-ink{background:var(--b900);color:#A8BDDC}
html[data-theme="dark"] .section-ink{background:#070C15}
.section-ink h2,.section-ink h3,.section-ink h4{color:#fff}
.section-ink p{color:#A8BDDC}

.stack-6{display:grid;gap:6px}
.stack-10{display:grid;gap:10px}
.stack-16{display:grid;gap:16px}
.stack-24{display:grid;gap:24px}
.grid{display:grid;gap:clamp(18px,2.2vw,30px)}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(34px,5.5vw,74px);align-items:center}
.split-a{grid-template-columns:1.25fr .75fr}
.split-rev>*:first-child{order:2}
.center{text-align:center}
.mx-auto{margin-inline:auto}
.wrap-flex{display:flex;flex-wrap:wrap}
.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}
.items-c{align-items:center}
.justify-c{justify-content:center}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}
.mt-32{margin-top:32px}.mt-40{margin-top:40px}.mt-56{margin-top:56px}
.mb-0{margin-bottom:0}

/* khối tiêu đề mục */
.sec-head{max-width:720px;margin-bottom:clamp(38px,4.5vw,64px)}
.sec-head.center{margin-inline:auto}
.sec-head h2{margin-top:18px}
.sec-head .lead{margin-top:20px}

.eyebrow{
  display:inline-flex;align-items:center;gap:11px;
  font-size:.7rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;
  color:var(--brand);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;opacity:.5}
.eyebrow-w{color:var(--b300)}

/* ── nút ───────────────────────────────────────────────────────────── */
.btn{
  --bh:50px;
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:var(--bh);padding-inline:28px;border-radius:999px;
  font-family:var(--font);font-weight:600;font-size:.9rem;letter-spacing:.005em;white-space:nowrap;
  transition:transform .3s cubic-bezier(.2,.7,.3,1),box-shadow .3s,background .25s,color .25s,border-color .25s;
  border:1px solid transparent;cursor:pointer;
}
.btn svg{width:17px;height:17px;flex:none}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:none}
.btn-sm{--bh:40px;padding-inline:20px;font-size:.84rem}
.btn-lg{--bh:56px;padding-inline:34px;font-size:.95rem}
.btn-block{display:flex;width:100%}

.btn-primary{background:#3B69B4;color:#fff;box-shadow:0 8px 22px -14px rgba(39,71,125,.9)}
.btn-primary:hover{background:#31589A;box-shadow:0 14px 30px -14px rgba(39,71,125,.85)}
html[data-theme="dark"] .btn-primary{background:#6791D5;color:#0A111C}
html[data-theme="dark"] .btn-primary:hover{background:#9CB8E3}

.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--b300);color:var(--brand);background:var(--card)}

.btn-soft{background:var(--brand-soft);color:var(--brand-deep)}
.btn-soft:hover{background:var(--b100)}

.btn-white{background:#fff;color:#27477D}
.btn-white:hover{background:#F2F6FC}

.btn-line-white{border-color:rgba(255,255,255,.32);color:#fff}
.btn-line-white:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.55)}

.btn-text{height:auto;padding:0;border-radius:0;color:var(--brand);font-weight:600;font-size:.88rem}
.btn-text:hover{transform:none;gap:14px}
.btn-text svg{transition:transform .3s}
.btn-text:hover svg{transform:translateX(4px)}

/* ── nhãn ──────────────────────────────────────────────────────────── */
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  font-size:.76rem;font-weight:600;letter-spacing:.02em;
  background:var(--brand-soft);color:var(--brand-deep);
  border:1px solid transparent;
}
.chip-line{background:transparent;border-color:var(--line);color:var(--ink-3);font-weight:500}
.chip-teal{background:var(--teal-soft);color:#0B7A6B}
html[data-theme="dark"] .chip-teal{color:#4ACFB8}
.chip-amber{background:var(--amber-soft);color:#9A6A0C}
html[data-theme="dark"] .chip-amber{color:#E6B45A}
.chip-rose{background:var(--rose-soft);color:#A83549}
html[data-theme="dark"] .chip-rose{color:#E88298}
.chip-glass{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.22);color:#fff}

.dot{width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.dot-live{background:#1FA98F;box-shadow:0 0 0 0 rgba(31,169,143,.5);animation:pulse 2.8s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(31,169,143,0)}100%{box-shadow:0 0 0 0 rgba(31,169,143,0)}}

/* ── thẻ nội dung ──────────────────────────────────────────────────── */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(26px,2.8vw,36px);
  transition:transform .4s cubic-bezier(.2,.7,.3,1),box-shadow .4s,border-color .4s;
  position:relative;
}
.card-hover:hover{transform:translateY(-3px);box-shadow:var(--e3);border-color:var(--b200)}
.card-lift{box-shadow:var(--e2)}
.card-tint{background:var(--bg-2);border-color:transparent}
.card-glass{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);color:#A8BDDC}

.ico{
  width:46px;height:46px;border-radius:13px;flex:none;
  display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);
  transition:background .35s,color .35s;
}
.ico svg{width:22px;height:22px}
.ico-sm{width:38px;height:38px;border-radius:11px}
.ico-sm svg{width:18px;height:18px}
.ico-teal{background:var(--teal-soft);color:#0B7A6B}
html[data-theme="dark"] .ico-teal{color:#4ACFB8}
.ico-amber{background:var(--amber-soft);color:#9A6A0C}
html[data-theme="dark"] .ico-amber{color:#E6B45A}
.ico-rose{background:var(--rose-soft);color:#A83549}
html[data-theme="dark"] .ico-rose{color:#E88298}
.ico-solid{background:#3B69B4;color:#fff}
.card-hover:hover .ico{background:#3B69B4;color:#fff}
.card-hover:hover .ico-solid{background:#27477D}

.card h3{margin-top:22px}
.card h3 + p{margin-top:12px}

/* danh sách dấu tích */
.ticks{display:grid;gap:13px}
.ticks li{display:flex;gap:13px;align-items:flex-start;font-size:.94rem;line-height:1.72;color:var(--ink-2)}
.ticks li::before{
  content:"";width:17px;height:17px;flex:none;margin-top:6px;border-radius:50%;
  background:var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233B69B4' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center/10px no-repeat;
}
.ticks-teal li::before{background-color:var(--teal-soft);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230B7A6B' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E")}
.ticks-white li{color:#B9CBE4}
.ticks-white li::before{background-color:rgba(255,255,255,.13);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FFFFFF' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E")}

/* ── số liệu ───────────────────────────────────────────────────────── */
.stat-n{
  font-size:clamp(2.15rem,1.5rem + 2.2vw,3rem);font-weight:600;
  color:var(--ink);letter-spacing:-.042em;line-height:1;
  font-variant-numeric:tabular-nums;
}
.stat-n .u{color:var(--brand)}
.stat-l{
  margin-top:14px;font-size:.8rem;color:var(--ink-3);
  font-weight:500;letter-spacing:.045em;line-height:1.6;
}
.stat-white .stat-n{color:#fff}
.stat-white .stat-n .u{color:#9CB8E3}
.stat-white .stat-l{color:#8FA6C7}

/* ── biểu mẫu ──────────────────────────────────────────────────────── */
.field{display:grid;gap:9px}
.field label{font-size:.8rem;font-weight:600;color:var(--ink);letter-spacing:.03em}
.field label .req{color:var(--rose)}
.input,.select,.textarea{
  width:100%;padding:14px 16px;border-radius:var(--r);
  background:var(--bg);border:1px solid var(--line);color:var(--ink);
  font-size:.94rem;transition:border-color .25s,box-shadow .25s;
}
.textarea{min-height:138px;resize:vertical;line-height:1.72}
.select{
  appearance:none;padding-right:42px;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237C8798' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center;background-size:16px;
}
.input::placeholder,.textarea::placeholder{color:var(--ink-3);opacity:.7}
.input:focus,.select:focus,.textarea:focus{
  outline:none;border-color:var(--b400);box-shadow:0 0 0 3px rgba(59,105,180,.1);
}
.field-err .input,.field-err .select,.field-err .textarea{border-color:var(--rose)}
.err-msg{display:none;font-size:.78rem;color:var(--rose);font-weight:500}
.field-err .err-msg{display:block}
.check{display:flex;gap:12px;align-items:flex-start;font-size:.85rem;color:var(--ink-3);cursor:pointer;line-height:1.65}
.check input{width:18px;height:18px;margin-top:3px;accent-color:#3B69B4;flex:none;cursor:pointer}

.form-note{
  display:none;padding:16px 20px;border-radius:var(--r);
  background:var(--teal-soft);color:#0B7A6B;font-size:.88rem;font-weight:600;
  border:1px solid rgba(15,156,137,.2);
}
html[data-theme="dark"] .form-note{color:#4ACFB8}
.form-note.on{display:block;animation:fade-up .5s both}

/* ── logo ──────────────────────────────────────────────────────────── */
.logo{display:flex;align-items:center;gap:14px;flex:none}
/* logo đầy đủ: khối xanh + chữ + dấu sắc chạm mép trên */
.logo-svg,.logo-img{
  height:44px;width:auto;flex:none;display:block;
  transition:height .35s;
}
.logo-img{max-width:220px;object-fit:contain}
.site-header.stuck .logo-svg,.site-header.stuck .logo-img{height:38px}
.logo-div{width:1px;height:22px;background:var(--line);flex:none}
.logo-tag{
  font-size:.63rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink-3);line-height:1.35;max-width:78px;
}

/* ── đầu trang ─────────────────────────────────────────────────────── */
.site-header{
  position:fixed;inset:0 0 auto;z-index:80;
  height:var(--head-h);
  transition:box-shadow .35s,border-color .35s,height .35s;
  border-bottom:1px solid transparent;
}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:var(--bg);opacity:0;
  backdrop-filter:blur(14px) saturate(150%);
  transition:opacity .35s;
}
.site-header.stuck{border-bottom-color:var(--line);height:68px}
.site-header.stuck::before{opacity:.9}
.header-inner{display:flex;align-items:center;gap:clamp(16px,2.6vw,40px);height:100%}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:8px 14px;
  font-size:.875rem;font-weight:500;color:var(--ink-2);letter-spacing:.01em;
  transition:color .25s;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:1px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .35s cubic-bezier(.2,.7,.3,1);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:clamp(8px,1.5vw,20px)}

.icon-btn{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  color:var(--ink-3);border:1px solid var(--line);background:transparent;
  transition:color .25s,border-color .25s;
}
.icon-btn:hover{color:var(--brand);border-color:var(--b300)}
.icon-btn svg{width:17px;height:17px}
.moon{display:none}
html[data-theme="dark"] .sun{display:none}
html[data-theme="dark"] .moon{display:block}

.burger{display:none;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);place-items:center;color:var(--ink)}
.burger span{display:block;width:16px;height:1.5px;border-radius:2px;background:currentColor;transition:transform .35s,opacity .25s}
.burger span+span{margin-top:5px}
.burger.on span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger.on span:nth-child(2){opacity:0}
.burger.on span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

.mobile-nav{
  position:fixed;inset:var(--head-h) 0 auto;z-index:79;
  background:var(--bg);border-bottom:1px solid var(--line);
  padding:10px var(--pad) 30px;
  display:none;box-shadow:var(--e3);
  max-height:calc(100vh - var(--head-h));overflow-y:auto;
}
.mobile-nav.on{display:block;animation:fade-down .32s both}
.mobile-nav .m-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 2px;border-bottom:1px solid var(--line-2);
  font-size:1.04rem;font-weight:600;letter-spacing:-.014em;color:var(--ink);
}
.mobile-nav .m-link.active{color:var(--brand)}
.mobile-nav .m-link svg{width:15px;height:15px;color:var(--ink-3)}

/* ── chân trang ────────────────────────────────────────────────────── */
.site-footer{background:#152741;color:#93A9C9;padding-top:clamp(64px,7vw,100px)}
html[data-theme="dark"] .site-footer{background:#070C15;border-top:1px solid var(--line)}
.site-footer h4{
  color:#fff;font-size:.7rem;font-weight:700;letter-spacing:.22em;
  text-transform:uppercase;margin-bottom:24px;
}
.site-footer a{color:#93A9C9;transition:color .25s}
.site-footer a:hover{color:#fff}
.site-footer p{color:#93A9C9}
.f-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.5fr;gap:clamp(32px,4.5vw,64px)}
.f-links{display:grid;gap:14px;font-size:.9rem}
.f-logo .logo-div{background:rgba(255,255,255,.18)}
.f-logo .logo-tag{color:#7E93B4}
.f-bottom{
  margin-top:clamp(48px,5.5vw,76px);padding-block:28px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;
  font-size:.82rem;
}
.socials{display:flex;gap:10px}
.social{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.13);color:#B9CBE4;
  transition:background .3s,color .3s,border-color .3s;
}
.social:hover{background:#3B69B4;border-color:#3B69B4;color:#fff}
.social svg{width:16px;height:16px}
.f-contact{display:grid;gap:16px;font-size:.9rem}
.f-contact li{display:flex;gap:13px;align-items:flex-start;line-height:1.65}
.f-contact svg{width:16px;height:16px;color:#6E8CBA;flex:none;margin-top:5px}

/* ── hero ──────────────────────────────────────────────────────────── */
.hero{
  position:relative;overflow:hidden;
  padding-top:calc(var(--head-h) + clamp(48px,6.5vw,88px));
  padding-bottom:clamp(64px,7.5vw,110px);
}
.hero-bg{position:absolute;inset:0;z-index:-1;overflow:hidden;background:var(--bg)}
.hero-bg::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--line-2) 1px,transparent 1px),linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:88px 88px;
  mask-image:radial-gradient(ellipse 78% 58% at 50% 0%,#000 25%,transparent 76%);
  -webkit-mask-image:radial-gradient(ellipse 78% 58% at 50% 0%,#000 25%,transparent 76%);
}
.blob{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none}
.blob-1{width:min(52vw,580px);aspect-ratio:1;background:#9CB8E3;top:-18%;right:-12%;opacity:.34}
.blob-2{width:min(42vw,440px);aspect-ratio:1;background:#0F9C89;bottom:-26%;left:-14%;opacity:.13}
.blob-3{width:min(32vw,340px);aspect-ratio:1;background:#C98A12;top:36%;left:40%;opacity:.07}
html[data-theme="dark"] .blob-1{opacity:.17}
html[data-theme="dark"] .blob-2{opacity:.1}
html[data-theme="dark"] .blob-3{opacity:.05}

.hero h1{margin-top:26px}
.hero .lead{margin-top:26px;max-width:576px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:40px}
.hero-meta{display:flex;flex-wrap:wrap;gap:34px;margin-top:52px;padding-top:38px;border-top:1px solid var(--line)}

/* hero cho trang trong */
.page-hero{
  position:relative;overflow:hidden;isolation:isolate;
  padding-top:calc(var(--head-h) + clamp(46px,5.5vw,76px));
  padding-bottom:clamp(50px,5.5vw,84px);
  background:var(--bg-2);border-bottom:1px solid var(--line);
}
.page-hero>.blob{z-index:-1}
.page-hero>.wrap{position:relative;z-index:1}
.crumbs{display:flex;align-items:center;gap:10px;font-size:.78rem;color:var(--ink-3);margin-bottom:22px;letter-spacing:.03em}
.crumbs a:hover{color:var(--brand)}
.crumbs svg{width:13px;height:13px;opacity:.5}

/* ── ảnh minh hoạ sản phẩm ─────────────────────────────────────────── */
.mock{
  border-radius:var(--r-xl);background:var(--card);
  border:1px solid var(--line);box-shadow:var(--e3);
  overflow:hidden;position:relative;
}
.mock-bar{
  display:flex;align-items:center;gap:7px;padding:14px 18px;
  border-bottom:1px solid var(--line);background:var(--bg-2);
}
.mock-bar i{width:8px;height:8px;border-radius:50%;display:block;background:var(--line)}
.mock-bar i:nth-child(1){background:#E4A5A0}.mock-bar i:nth-child(2){background:#E8CB93}.mock-bar i:nth-child(3){background:#A6CFAC}
.mock-url{
  margin-left:12px;flex:1;height:25px;border-radius:6px;background:var(--bg-3);
  display:flex;align-items:center;padding-inline:12px;
  font-size:.68rem;color:var(--ink-3);font-family:var(--mono);letter-spacing:.02em;
}
.mock-body{display:grid;grid-template-columns:62px 1fr;min-height:330px}
.mock-side{border-right:1px solid var(--line);padding:20px 0;display:grid;gap:10px;justify-items:center;align-content:start;background:var(--bg-2)}
.mock-side i{width:28px;height:28px;border-radius:8px;background:var(--line-2);display:block}
.mock-side i.on{background:#3B69B4;opacity:.85}
.mock-main{padding:24px;display:grid;gap:18px;align-content:start}
.mock-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.mock-tile{border:1px solid var(--line);border-radius:var(--r);padding:15px;background:var(--bg)}
.mock-tile b{display:block;font-size:1.28rem;font-weight:600;color:var(--ink);letter-spacing:-.032em}
.mock-tile span{font-size:.66rem;color:var(--ink-3);letter-spacing:.04em}
.mock-chart{
  border:1px solid var(--line);border-radius:var(--r-lg);padding:18px;background:var(--bg);
  display:flex;align-items:flex-end;gap:10px;height:150px;
}
.mock-chart b{flex:1;border-radius:4px 4px 2px 2px;background:#3B69B4;opacity:.82}
.mock-chart b:nth-child(even){background:#C6D6EF;opacity:1}
.mock-lines{display:grid;gap:10px}
.mock-lines i{height:8px;border-radius:4px;background:var(--line-2);display:block}
.float-card{
  position:absolute;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:14px 18px;box-shadow:var(--e3);
  display:flex;align-items:center;gap:12px;font-size:.8rem;font-weight:600;color:var(--ink);
  letter-spacing:.005em;
}
.fc-1{top:-20px;left:-26px}
.fc-2{bottom:30px;right:-30px}

/* ── dải logo đối tác ──────────────────────────────────────────────── */
.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent)}
.marquee-track{display:flex;gap:clamp(40px,5.5vw,84px);width:max-content;animation:slide 48s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes slide{to{transform:translateX(-50%)}}
.plogo{
  display:flex;align-items:center;gap:11px;flex:none;
  font-weight:500;font-size:.95rem;color:var(--ink-3);letter-spacing:.01em;
  opacity:.8;transition:opacity .3s,color .3s;white-space:nowrap;
}
.plogo:hover{opacity:1;color:var(--brand)}
.plogo svg{width:22px;height:22px;flex:none;opacity:.75}

/* ── accordion ─────────────────────────────────────────────────────── */
[data-acc-solo]{border-top:1px solid var(--line)}
.acc{border-bottom:1px solid var(--line);background:transparent;transition:border-color .3s}
.acc-head{
  width:100%;display:flex;align-items:center;gap:18px;text-align:left;text-wrap:pretty;
  padding:24px 4px;font-weight:600;letter-spacing:-.016em;
  color:var(--ink);font-size:1.04rem;line-height:1.5;
  transition:color .25s;
}
.acc-head:hover{color:var(--brand)}
.acc-head .plus{
  margin-left:auto;flex:none;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--line);display:grid;place-items:center;color:var(--ink-3);
  transition:transform .4s cubic-bezier(.2,.7,.3,1),border-color .3s,color .3s;
}
.acc-head .plus svg{width:14px;height:14px}
.acc.on .acc-head{color:var(--brand)}
.acc.on .plus{transform:rotate(180deg);border-color:var(--b300);color:var(--brand)}
.acc-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .42s cubic-bezier(.3,.8,.3,1)}
.acc.on .acc-body{grid-template-rows:1fr}
.acc-body>div{overflow:hidden}
.acc-body .inner{padding:0 44px 28px 4px;color:var(--ink-2);font-size:.94rem;line-height:1.8}

/* ── tabs ──────────────────────────────────────────────────────────── */
.tabs{display:flex;flex-wrap:wrap;gap:2px;border-bottom:1px solid var(--line);width:100%}
.tab{
  position:relative;padding:13px 20px;
  font-size:.86rem;font-weight:500;color:var(--ink-3);letter-spacing:.015em;
  transition:color .25s;white-space:nowrap;
}
.tab::after{
  content:"";position:absolute;left:20px;right:20px;bottom:-1px;height:1.5px;
  background:var(--brand);transform:scaleX(0);transition:transform .35s cubic-bezier(.2,.7,.3,1);
}
.tab:hover{color:var(--ink)}
.tab.on{color:var(--brand);font-weight:600}
.tab.on::after{transform:scaleX(1)}
.tab-panel{display:none}
.tab-panel.on{display:block;animation:fade-up .5s both}

/* ── dòng thời gian ────────────────────────────────────────────────── */
.tl{position:relative;padding-left:38px}
.tl::before{content:"";position:absolute;left:6px;top:10px;bottom:10px;width:1px;background:linear-gradient(180deg,var(--b300),var(--line) 90%)}
.tl-item{position:relative;padding-bottom:38px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-38px;top:9px;width:13px;height:13px;border-radius:50%;
  border:1px solid var(--b300);background:var(--bg);
}
.tl-item::after{
  content:"";position:absolute;left:-34.5px;top:12.5px;width:6px;height:6px;border-radius:50%;
  background:#3B69B4;
}
.tl-year{font-size:.72rem;font-weight:700;color:var(--brand);letter-spacing:.2em}
.tl-item h4{margin:10px 0 9px}

/* ── các bước ──────────────────────────────────────────────────────── */
.step{position:relative;padding-top:30px}
.step-n{
  position:absolute;top:0;left:0;
  font-size:.78rem;font-weight:700;line-height:1;
  color:var(--brand);letter-spacing:.2em;
}
.step h4{margin-bottom:10px}
.step-line{position:absolute;top:6px;left:34px;right:-14px;height:1px;background:var(--line)}

/* ── bài viết ──────────────────────────────────────────────────────── */
.post{display:flex;flex-direction:column;overflow:hidden;padding:0}
.post-thumb{
  position:relative;aspect-ratio:16/10;overflow:hidden;
  background:linear-gradient(135deg,#3B69B4,#27477D);
}
.post-thumb svg{width:100%;height:100%}
.post-thumb .chip{position:absolute;top:16px;left:16px}
.post-body{padding:26px clamp(22px,2.2vw,30px) 30px;display:flex;flex-direction:column;flex:1;gap:14px}
.post-meta{
  display:flex;flex-wrap:wrap;gap:18px;font-size:.75rem;color:var(--ink-3);
  margin-top:auto;padding-top:10px;letter-spacing:.03em;
}
.post-meta span{display:flex;align-items:center;gap:7px}
.post-meta svg{width:13px;height:13px}
.post h3{margin:0;transition:color .3s;text-wrap:balance}
.post:hover h3{color:var(--brand)}
.post-feat{display:grid;grid-template-columns:1.1fr 1fr;align-items:stretch}
.post-feat .post-thumb{aspect-ratio:auto;height:100%;min-height:300px}
.post-feat .post-body{padding:clamp(30px,3.4vw,52px);justify-content:center;gap:18px}
.post-feat h3{font-size:clamp(1.35rem,1.1rem + 1vw,1.95rem);line-height:1.3}

/* ── nhân sự ───────────────────────────────────────────────────────── */
.team-photo{
  aspect-ratio:1;border-radius:var(--r-lg);overflow:hidden;position:relative;
  background:linear-gradient(155deg,var(--b100),var(--b200));
  transition:box-shadow .4s;
}
html[data-theme="dark"] .team-photo{background:linear-gradient(155deg,#1D3560,#27477D)}
.team-photo svg{width:100%;height:100%}
.team-card:hover .team-photo{box-shadow:var(--e2)}
.team-card h4{margin-top:20px;font-weight:600;font-size:1.06rem;letter-spacing:-.016em}
.team-role{font-size:.76rem;color:var(--brand);font-weight:600;margin-top:5px;letter-spacing:.06em;text-transform:uppercase}

/* ── tuyển dụng ────────────────────────────────────────────────────── */
.job-list{border-top:1px solid var(--line)}
.job{
  display:flex;flex-wrap:wrap;align-items:center;gap:20px;
  padding:26px 4px;border-bottom:1px solid var(--line);
  transition:padding-left .35s cubic-bezier(.2,.7,.3,1);
}
.job:hover{padding-left:14px}
.job-main{flex:1;min-width:250px}
.job-main h4{font-weight:600;font-size:1.08rem;letter-spacing:-.018em;transition:color .25s}
.job:hover .job-main h4{color:var(--brand)}
.job-tags{display:flex;flex-wrap:wrap;gap:18px;margin-top:12px}
.job-tag{display:inline-flex;align-items:center;gap:7px;font-size:.78rem;color:var(--ink-3);letter-spacing:.02em}
.job-tag svg{width:13px;height:13px;opacity:.65}

/* ── trích dẫn ─────────────────────────────────────────────────────── */
.quote{position:relative}
.quote p{
  font-size:1.05rem;font-weight:400;
  line-height:1.8;color:var(--ink);letter-spacing:-.006em;
}
.quote-by{display:flex;align-items:center;gap:14px;margin-top:26px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-deep);font-weight:700;font-size:.82rem;letter-spacing:.04em;
}

/* ── dải kêu gọi ───────────────────────────────────────────────────── */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-xl);
  background:linear-gradient(140deg,#1D3560,#27477D 55%,#31589A);
  padding:clamp(42px,5.5vw,80px);color:#fff;
}
.cta-band h2{color:#fff}
.cta-band p{color:#C2D3EA}
.cta-band::before{
  content:"";position:absolute;top:-46%;right:-8%;width:min(44vw,460px);aspect-ratio:1;
  border-radius:50%;background:rgba(255,255,255,.06);
}
.cta-band::after{
  content:"";position:absolute;bottom:-60%;left:4%;width:min(36vw,380px);aspect-ratio:1;
  border-radius:50%;background:rgba(15,156,137,.14);
}
.cta-inner{position:relative;z-index:1}

/* ── linh tinh ─────────────────────────────────────────────────────── */
.rule{height:1px;background:var(--line);border:0}
.kv{display:flex;gap:13px;align-items:flex-start}
.kv svg{width:18px;height:18px;color:var(--brand);flex:none;margin-top:5px}
.pager{display:flex;gap:6px;justify-content:center;align-items:center}
.pager a,.pager span{
  min-width:40px;height:40px;padding-inline:12px;border-radius:50%;
  display:grid;place-items:center;font-weight:500;font-size:.85rem;
  color:var(--ink-3);transition:.25s;
}
.pager a{border-radius:999px}
.pager a:hover{color:var(--brand);background:var(--bg-2)}
.pager .on{background:#3B69B4;color:#fff;font-weight:600}
.pager .off{opacity:.35;pointer-events:none}

.to-top{
  position:fixed;right:26px;bottom:26px;z-index:60;
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  background:var(--card);color:var(--brand);border:1px solid var(--line);
  box-shadow:var(--e2);
  opacity:0;pointer-events:none;transform:translateY(10px);transition:.35s;
}
.to-top.on{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{border-color:var(--b300);color:var(--brand-deep)}
.to-top svg{width:18px;height:18px}

/* ── hiện dần ──────────────────────────────────────────────────────── */
.reveal{opacity:0;transform:translateY(18px)}
.reveal.in{
  opacity:1;transform:none;
  transition:opacity .9s cubic-bezier(.2,.7,.3,1),transform .9s cubic-bezier(.2,.7,.3,1);
  transition-delay:var(--d,0ms);
}
@keyframes fade-up{from{opacity:0;transform:translateY(10px)}}
@keyframes fade-down{from{opacity:0;transform:translateY(-8px)}}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  .marquee-track{animation:none}
}

/* ── đáp ứng ───────────────────────────────────────────────────────── */
@media (max-width:1080px){
  .nav{display:none}
  .burger{display:grid}
  .g-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .f-grid{grid-template-columns:1.4fr 1fr 1fr}
  .f-grid>:last-child{grid-column:1/-1}
}
@media (max-width:900px){
  .split,.split-a{grid-template-columns:1fr}
  .split-rev>*:first-child{order:0}
  .g-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-feat{grid-template-columns:1fr}
  .post-feat .post-thumb{min-height:220px;aspect-ratio:16/9}
  .step-line{display:none}
  .float-card{display:none}
  .logo-div,.logo-tag{display:none}
}
@media (max-width:620px){
  :root{--head-h:66px}
  .site-header.stuck{height:var(--head-h)}
  .g-2,.g-3,.g-4{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr;gap:38px}
  .hero-meta{gap:24px}
  .btn{--bh:48px;padding-inline:24px}
  .hero-cta .btn{flex:1;min-width:160px}
  .tabs{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
  .tabs::-webkit-scrollbar{display:none}
  .f-bottom{flex-direction:column;align-items:flex-start;gap:18px}
  .header-actions .btn{display:none}
  .mock-body{grid-template-columns:1fr}
  .mock-side{display:none}
  .acc-body .inner{padding-right:8px}
}

/* ── nội dung dài (bài viết, mô tả công việc) ──────────────────────── */
.prose{font-size:1.02rem;line-height:1.85;color:var(--ink-2)}
.prose > * + *{margin-top:1.15em}
.prose h2{font-size:1.5rem;margin-top:1.9em;letter-spacing:-.024em}
.prose h3{font-size:1.2rem;margin-top:1.7em;letter-spacing:-.016em}
.prose ul{display:grid;gap:.55em;padding-left:1.2em;list-style:disc}
.prose ol{display:grid;gap:.55em;padding-left:1.35em;list-style:decimal}
.prose li::marker{color:var(--b300)}
.prose a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{border-left:2px solid var(--b300);padding-left:22px;color:var(--ink);font-size:1.06rem}
.prose img{border-radius:var(--r-lg);margin-block:1.7em}
.prose code{font-family:var(--mono);font-size:.9em;background:var(--bg-2);padding:2px 6px;border-radius:6px}
.prose hr{height:1px;background:var(--line);border:0;margin-block:2em}