:root{
    --navy:#0A2472;
    --navy-900:#071a52;
    --royal:#1E40AF;
    --royal-300:#5B7BE0;
    --amber:#F5A623;
    --amber-600:#E08E0B;
    --ink:#171717;
    --muted:#5A6072;
    --line:#E4E8F2;
    --cloud:#F4F6FB;
    --cloud-2:#EBEFF9;
    --white:#FFFFFF;
    --ok:#12A150;
    --bad:#D64545;
    --radius:16px;
    --shadow:0 18px 50px -20px rgba(10,36,114,.35);
    --shadow-sm:0 6px 20px -8px rgba(10,36,114,.25);
    --font:"Be Vietnam Pro","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
    --wrap:1440px;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  h1,h2,h3{text-wrap:balance;line-height:1.15;letter-spacing:-.01em;color:var(--navy)}
  .wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
  .eyebrow{display:none;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--royal)}
  .eyebrow.on-dark{color:var(--amber)}
  section{padding:32px 0}
  .center{text-align:center}
  .sec-head{max-width:none;margin:0 auto 26px}
  @media(min-width:861px){.sec-head h2,.sec-head p{white-space:nowrap}}
  .sec-head h2{font-size:clamp(1.7rem,3.6vw,2.5rem);font-weight:800;margin:12px 0}
  .sec-head p{color:var(--muted);font-size:1.06rem}

  /* buttons */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:inherit;font-weight:700;font-size:1rem;line-height:1;
    padding:15px 30px;border-radius:999px;cursor:pointer;border:2px solid transparent;box-sizing:border-box;transition:transform .15s ease,box-shadow .2s ease,background .2s,border-color .2s}
  .btn svg{width:18px;height:18px}
  .btn-amber{background:var(--amber);color:#3a2600;border-color:var(--amber);box-shadow:0 12px 28px -8px rgba(245,166,35,.75)}
  .btn-amber:hover{background:var(--amber-600);border-color:var(--amber-600);transform:translateY(-2px);box-shadow:0 16px 32px -8px rgba(245,166,35,.8)}
  .btn-navy{background:var(--navy);color:#fff;border-color:var(--navy)}
  .btn-navy:hover{background:var(--navy-900);border-color:var(--navy-900);transform:translateY(-2px)}
  .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
  .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
  .btn-outline{background:#fff;color:var(--navy);border-color:var(--navy)}
  .btn-outline:hover{background:var(--navy);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px -10px rgba(10,36,114,.55)}
  .btn-lg{padding:18px 40px;font-size:1.08rem}

  /* header */
  header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:88px}
  .logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.6rem;color:var(--navy);letter-spacing:-.02em}
  .logo .mark{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--royal),var(--navy));display:grid;place-items:center;color:#fff;font-size:1.1rem}
  .navlinks{display:flex;gap:42px;font-weight:700;font-size:1.28rem;color:#33384a}
  .navlinks a:hover{color:var(--royal)}
  .nav .btn{padding:15px 32px;font-size:1.05rem}
  @media(max-width:860px){.navlinks{display:none}}

  /* hero — anh nen full viewport, sac net ben phai, fade trang ben trai */
  .hero{position:relative;overflow:hidden;color:var(--ink);background:#fff}
  /* Cot anh (.hero-visual): pha khoi wrap, trai het viewport, lam anh nen */
  .hero-visual{position:absolute!important;top:0;bottom:0;left:50%;transform:translateX(-50%);
    width:100vw;z-index:1;margin:0;padding:0;overflow:hidden}
  .hero-visual .demo-card,.hero .demo-card{width:100%!important;height:100%!important;
    background:transparent!important;border:0!important;box-shadow:none!important;
    border-radius:0!important;padding:0!important;margin:0!important;position:relative}
  .hero-visual img,.hero .demo-card img{
    width:100%!important;height:100%!important;aspect-ratio:auto!important;
    object-fit:cover!important;object-position:right center!important;
    filter:none!important;display:block!important;
    border:0!important;border-radius:0!important;box-shadow:none!important;margin:0!important;padding:0!important}
  /* Fade trang: opaque ben trai -> trong suot ben phai. Anh o nua phai giu nguyen net */
  .hero-visual::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
    background:linear-gradient(90deg,
      rgba(255,255,255,0.98) 0%,
      rgba(255,255,255,0.95) 20%,
      rgba(255,255,255,0.78) 38%,
      rgba(255,255,255,0.35) 55%,
      rgba(255,255,255,0.05) 72%,
      rgba(255,255,255,0) 82%)}
  /* Cho nut "Doi anh" (them boi admin.js) noi len tren fade, click duoc */
  .hero-visual .admin-imgbtn,.hero-visual .admin-ctl{z-index:10;pointer-events:auto}
  /* Text noi len tren, cot trai only */
  .hero .wrap{position:relative;z-index:3;display:block;padding-top:36px;padding-bottom:24px}
  .hero .wrap > div:first-child{position:relative;z-index:4;max-width:820px;width:100%;padding-top:0}
  .hero .eyebrow{margin-top:0;font-size:1rem;margin-bottom:10px}
  .hero h1{color:var(--navy);font-weight:800;margin:0 0 18px}.hero h1 .brand{display:block;font-size:clamp(3.6rem,7vw,5.4rem);line-height:1.02;margin-bottom:12px;letter-spacing:-.5px}.hero h1 .tagline{display:block;font-size:clamp(1.8rem,3.6vw,2.6rem);font-weight:700;line-height:1.2;color:var(--navy)}
  .hero h1 .hl{color:var(--amber)}
  .hero .lead{font-size:1.22rem;color:var(--muted);max-width:720px;line-height:1.55}
  .hero-cta{display:flex;gap:14px;flex-wrap:nowrap;margin:22px 0 18px}
  .hero-trust{display:flex;align-items:center;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:.94rem}
  .avatars{display:flex}
  .avatars span{width:34px;height:34px;border-radius:50%;border:2px solid #fff;margin-left:-10px;background:linear-gradient(135deg,var(--royal-300),var(--amber));display:grid;place-items:center;font-size:.8rem;font-weight:700;color:#fff}
  .stars{color:var(--amber);letter-spacing:2px}
  /* Badge chip noi bat, dat ngay duoi hero-trust */
  .hero-badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}
  @media(max-width:860px){
    .hero{min-height:auto}
    .hero .wrap{padding-top:30px;padding-bottom:40px;text-align:center;min-height:auto}
    .hero .wrap > div:first-child{max-width:100%;margin:0 auto}
    .hero .lead{margin:0 auto}.hero-cta,.hero-trust,.hero-badges{justify-content:center}
    .hero-visual img,.hero .demo-card img{object-position:center center!important}
    .hero::after{background:linear-gradient(180deg,
      rgba(255,255,255,0.96) 0%,
      rgba(255,255,255,0.85) 45%,
      rgba(255,255,255,0.55) 75%,
      rgba(255,255,255,0.2) 100%)}
  }
  .demo-screen{background:#0b1852;border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:16px;position:relative;aspect-ratio:16/9;overflow:hidden}
  .demo-dots{display:flex;gap:6px;margin-bottom:12px}
  .demo-dots i{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.25)}
  .prog{height:9px;border-radius:6px;background:rgba(255,255,255,.14);margin:9px 0;overflow:hidden}
  .prog b{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,var(--amber),#ffd074);animation:load 2.6s ease-in-out infinite}
  .prog:nth-child(3) b{animation-delay:.5s;width:72%}
  .prog:nth-child(4) b{animation-delay:1s;width:54%}
  @keyframes load{0%{width:8%}55%{width:92%}100%{width:8%}}
  .demo-tag{position:absolute;bottom:14px;left:16px;right:16px;display:flex;gap:8px;flex-wrap:wrap}
  .demo-tag span{font-size:.72rem;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);padding:5px 10px;border-radius:8px;color:#dbe3ff}
  .float{position:absolute;background:#fff;color:var(--ink);border-radius:12px;padding:10px 14px;box-shadow:var(--shadow);font-weight:700;font-size:.86rem;display:flex;align-items:center;gap:8px}
  .float b{color:var(--ok)}
  .float.one{top:-16px;right:-6px;animation:bob 4s ease-in-out infinite}
  .float.two{bottom:-18px;left:-10px;animation:bob 4s ease-in-out infinite .8s}
  /* Trong hero-badges: bien float thanh chip inline sang noi bat */
  .hero-badges .float{position:static;animation:none;padding:10px 18px;border-radius:999px;
    background:#fff;font-size:.95rem;font-weight:700;
    box-shadow:0 10px 24px -8px rgba(30,64,175,.35), 0 0 0 1.5px rgba(30,64,175,.12), inset 0 0 0 1px rgba(255,255,255,.9)}
  .hero-badges .float.one{color:var(--amber-600)}
  .hero-badges .float.two{color:var(--navy)}
  .hero-badges .float.three{color:var(--ok)}
  .hero-badges .float b{color:inherit;font-weight:800}
  @keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

  /* metric strip */
  /* Metrics: bien thanh 4 badge pill noi tren nen trang */
  .metrics{background:#fff;color:var(--ink);padding:0}
  .metrics .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding-top:34px;padding-bottom:34px}
  .metric{display:flex;align-items:center;gap:14px;padding:16px 22px;background:#fff;border-radius:999px;
    box-shadow:0 14px 32px -12px rgba(30,64,175,.32), 0 0 0 1.5px rgba(30,64,175,.10), inset 0 0 0 1px rgba(255,255,255,.9);
    transition:transform .2s ease, box-shadow .2s ease}
  .metric:hover{transform:translateY(-3px);box-shadow:0 18px 40px -12px rgba(30,64,175,.4), 0 0 0 1.5px rgba(30,64,175,.15)}
  .metric .n{font-size:1.7rem;font-weight:800;color:var(--amber);font-variant-numeric:tabular-nums;line-height:1;white-space:nowrap}
  .metric .l{font-size:.86rem;color:var(--muted);font-weight:600;line-height:1.25}
  .metric:nth-child(1){border-left:4px solid var(--amber)}
  .metric:nth-child(2){border-left:4px solid var(--royal)}
  .metric:nth-child(3){border-left:4px solid var(--ok)}
  .metric:nth-child(4){border-left:4px solid #d64545}
  .metric:nth-child(1) .n{color:var(--amber)}
  .metric:nth-child(2) .n{color:var(--royal)}
  .metric:nth-child(3) .n{color:var(--ok)}
  .metric:nth-child(4) .n{color:#d64545}
  @media(max-width:900px){.metrics .wrap{grid-template-columns:repeat(2,1fr);gap:16px;padding-top:24px;padding-bottom:24px}}
  @media(max-width:520px){.metrics .wrap{grid-template-columns:1fr}}

  /* logos */
  .logos{padding:34px 0;background:var(--cloud)}
  .logos p{text-align:center;color:var(--muted);font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;font-weight:700;margin-bottom:18px}
  .logo-row{display:flex;justify-content:center;gap:14px 30px;flex-wrap:wrap;align-items:center;opacity:.8}
  .logo-row span{font-weight:800;color:var(--navy);font-size:1.05rem;opacity:.75}

  /* problem */
  .prob{background:var(--white)}
  .grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  @media(max-width:860px){.grid3{grid-template-columns:1fr}}
  .pcard{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .18s,box-shadow .2s;position:relative}
  .pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
  .pcard .ic{width:60px;height:60px;border-radius:15px;background:linear-gradient(135deg,var(--amber),#ffca6b);display:grid;place-items:center;margin-bottom:16px;color:#3a2600;font-size:1.7rem;box-shadow:0 10px 22px -6px rgba(245,166,35,.55)}
  .pcard h3{font-size:1.08rem;font-weight:700;color:var(--ink);margin-bottom:6px}
  .pcard p{color:var(--muted);font-size:.95rem}

  /* features — pastel card carousel (HeyGen style) */
  .feat{background:var(--cloud);overflow:hidden}
  .feat-carousel{position:relative}
  .fc-viewport{overflow:hidden}
  .fc-track{display:flex;gap:22px;--fc-vis:4;align-items:stretch}
  .fcard{flex:0 0 calc((100% - (var(--fc-vis) - 1) * 22px) / var(--fc-vis));box-sizing:border-box;display:flex;flex-direction:column;gap:15px;border-radius:22px;padding:24px 22px;border:1px solid rgba(10,36,114,.05)}
  .fcard[data-tone="1"]{background:#efe9fc}
  .fcard[data-tone="2"]{background:#e6f6ec}
  .fcard[data-tone="3"]{background:#e4f1fb}
  .fcard[data-tone="4"]{background:#fde9f2}
  .fcard[data-tone="5"]{background:#fff2dd}
  .fcard-top{margin:0}
  .fcard-top::after{content:"";display:table;clear:both}
  .fcard-title{font-size:1.05rem;font-weight:800;line-height:1.24;color:var(--navy);margin:0;text-wrap:wrap;text-wrap-style:auto}
  .fvid{position:relative}
  .fcard-go{position:absolute;top:10px;right:10px;z-index:4;width:38px;height:38px;border-radius:50%;background:#fff;display:grid;place-items:center;color:var(--navy);font-size:1.1rem;font-weight:700;text-decoration:none;box-shadow:0 4px 14px -4px rgba(10,36,114,.55);transition:transform .15s,background .15s,color .15s}
  .fcard-go:hover{background:var(--amber);color:#3a2600;transform:translateX(3px)}
  .fcard .fimg{aspect-ratio:16/9;border-radius:14px;overflow:hidden;position:relative;background:linear-gradient(135deg,var(--navy),var(--royal));box-shadow:0 12px 26px -16px rgba(10,36,114,.6);margin:0}
  .fcard .fimg iframe,.fcard .fimg video,.fcard .fimg img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border:0}
  .fcard .fimg .fyt-thumb{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
  .fcard .fimg .fyt-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:56px;height:56px;border-radius:50%;border:0;cursor:pointer;background:rgba(0,0,0,.5);z-index:3;transition:background .15s}
  .fcard .fimg .fyt-play::before{content:"";position:absolute;left:53%;top:50%;transform:translate(-50%,-50%);border-style:solid;border-width:10px 0 10px 16px;border-color:transparent transparent transparent #fff}
  .fcard .fimg .fyt-play:hover{background:#ff0000}
  .fcard ul{list-style:none;display:flex;flex-direction:column;gap:8px;margin:0}
  .fcard li{position:relative;padding-left:25px;color:#39405a;font-size:.9rem;line-height:1.42}
  .fcard li svg{position:absolute;left:0;top:2px;width:17px;height:17px;color:var(--royal)}
  .fc-arrow{position:absolute;top:34%;z-index:6;width:46px;height:46px;border-radius:50%;border:0;background:#fff;color:var(--navy);font-size:1.6rem;line-height:1;cursor:pointer;box-shadow:0 10px 24px -8px rgba(10,36,114,.45);display:grid;place-items:center;transition:background .15s,color .15s}
  .fc-arrow:hover{background:var(--navy);color:#fff}
  .fc-prev{left:-6px}.fc-next{right:-6px}
  .fc-arrow[hidden]{display:none}
  @media(max-width:1024px){.fc-track{--fc-vis:2}}
  @media(max-width:620px){.fc-track{--fc-vis:1}}
  /* admin mode: single-row carousel, no autoplay, room for delete buttons */
  body:has(#adminBar) .fc-viewport{padding-top:18px}

  /* help / solution bridge */
  .help{background:#fff}
  .help-bridge{text-align:center;max-width:none;margin:0 auto 8px;font-size:1.08rem;color:var(--muted)}
  .help-bridge b{color:var(--royal)}
  .help-box{background:var(--cloud);border:1px solid var(--line);border-radius:24px;padding:40px;margin-top:30px}
  .help-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
  @media(max-width:860px){.help-box{padding:26px}.help-grid{grid-template-columns:1fr;gap:28px}}
  .help-list ul{list-style:none;display:flex;flex-direction:column;gap:15px}
  .help-list li{position:relative;padding-left:34px;font-size:1.05rem;font-weight:600;color:#26304a;line-height:1.45}
  .help-list li svg{position:absolute;left:0;top:3px;width:24px;height:24px;color:var(--royal)}
  .help-video{position:relative;aspect-ratio:16/9;border-radius:18px;overflow:hidden;
    background:radial-gradient(500px 300px at 70% 20%,rgba(245,166,35,.25),transparent 60%),linear-gradient(135deg,var(--navy),var(--royal));
    display:grid;place-items:center;box-shadow:var(--shadow)}
  .help-video video,.help-video iframe,.help-video img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border:0}
  .help-video .play{width:80px;height:80px;border-radius:50%;background:rgba(255,255,255,.94);display:grid;place-items:center;cursor:pointer;box-shadow:0 12px 34px rgba(0,0,0,.35);transition:transform .15s;position:relative;z-index:2}
  .help-video .play:hover{transform:scale(1.08)}
  .help-video .play svg{width:30px;height:30px;color:var(--navy);margin-left:5px}
  .help-video .play::before{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid rgba(255,255,255,.6);animation:ring 1.9s ease-out infinite}
  .help-video .vlabel{position:absolute;bottom:16px;left:0;right:0;text-align:center;color:#e3e9ff;font-size:.92rem;font-weight:600;z-index:2}
  .help-video .ratio-tag{position:absolute;top:12px;right:12px;background:var(--amber);color:#3a2600;font-weight:800;font-size:.74rem;padding:4px 10px;border-radius:8px;z-index:2}

  /* steps */
  .steps{background:#fff}
  .step-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:s;background:linear-gradient(150deg,#aec6f7,#d3e1ff);border:1px solid #93b3ef;border-radius:24px;padding:32px;box-shadow:0 22px 48px -20px rgba(10,36,114,.42)}
  @media(max-width:860px){.step-row{grid-template-columns:1fr}}
  .step{position:relative;padding:26px 22px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 26px -14px rgba(10,36,114,.25)}
  .step .num{width:44px;height:44px;border-radius:12px;background:var(--navy);color:var(--amber);font-weight:800;font-size:1.2rem;display:grid;place-items:center;margin-bottom:16px}
  .step h3{font-size:1.16rem;margin-bottom:8px}
  .step p{color:var(--muted);font-size:.96rem}

  /* comparison */
  .compare{background:var(--cloud)}
  .compare h2{color:var(--navy)}
  .compare .sec-head p{color:var(--muted)}
  .tbl-wrap{overflow-x:auto;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:0 26px 55px -22px rgba(10,36,114,.4)}
  table.cmp{width:100%;border-collapse:collapse;min-width:640px}
  table.cmp th,table.cmp td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:.96rem}table.cmp tbody tr:last-child td{border-bottom:0}table.cmp tbody tr:nth-child(even) td{background:var(--cloud)}
  table.cmp thead th{font-weight:800;color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;background:var(--navy)}
  table.cmp thead th.viai{color:#3a2600;background:var(--amber)}
  table.cmp td.viai{background:rgba(245,166,35,.18) !important;font-weight:800;color:var(--navy)}
  table.cmp td:first-child{color:var(--navy);font-weight:700}
  .yes{color:var(--ok);font-weight:700}.no{color:var(--bad);font-weight:600}

  /* pricing */
  .pricing{background:var(--cloud)}
  .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
  @media(max-width:900px){.price-grid{grid-template-columns:1fr;max-width:440px;margin:0 auto}}
  .plan{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px 26px;display:flex;flex-direction:column;position:relative}
  .plan.pop{border:2px solid var(--amber);box-shadow:var(--shadow);transform:scale(1.02);background:linear-gradient(180deg,#ffe3ad,#fff6e2 62%)}
  .plan .badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--amber);color:#3a2600;font-weight:800;font-size:.76rem;letter-spacing:.08em;padding:6px 16px;border-radius:999px;text-transform:uppercase}
  .plan h3{font-size:1.3rem;font-weight:800}
  .plan .who{color:var(--muted);font-size:.9rem;min-height:40px;margin-top:4px}
  .plan .old{color:#9aa1b4;text-decoration:line-through;font-size:1rem;margin-top:14px}
  .plan .now{font-size:2.1rem;font-weight:800;color:var(--navy)}
  .plan .now small{font-size:.95rem;font-weight:600;color:var(--muted)}
  .off{display:inline-block;background:#fdeede;color:var(--amber-600);font-weight:800;font-size:.78rem;padding:3px 10px;border-radius:6px;margin-left:8px}
  .plan ul{list-style:none;margin:20px 0 24px;display:flex;flex-direction:column;gap:11px}
  .plan li{position:relative;padding-left:27px;font-size:.94rem;color:#33384a}
  .plan li svg{position:absolute;left:0;top:4px;width:18px;height:18px;color:var(--ok)}
  .plan .btn{width:100%;justify-content:center;margin-top:auto}
  .plan small.act{display:block;text-align:center;color:var(--muted);font-size:.8rem;margin-top:10px}

  /* guarantees — dải nổi bật */
  .guar{background:radial-gradient(760px 420px at 82% 0%,rgba(245,166,35,.22),transparent 60%),linear-gradient(135deg,#0a2472 0%,#1e40af 100%)}
  .guar .sec-head h2{color:#fff}
  .grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
  @media(max-width:860px){.grid4{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:520px){.grid4{grid-template-columns:1fr}}
  .gcard{text-align:center;padding:32px 20px;border-radius:18px;background:#fff;border:0;box-shadow:0 22px 44px -20px rgba(0,0,0,.5);transition:transform .18s}
  .gcard:hover{transform:translateY(-6px)}
  .gcard .ic{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--amber),#ffca6b);display:grid;place-items:center;margin:0 auto 16px;color:#3a2600;font-size:1.85rem;box-shadow:0 10px 22px -6px rgba(245,166,35,.65)}
  .gcard h3{font-size:1.14rem;margin-bottom:7px;color:var(--navy);font-weight:800}
  .gcard p{color:var(--muted);font-size:.9rem}

  /* testimonials */
  .testi{background:var(--cloud)}
  .grid3.t{align-items:stretch}
  .tcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:15px}
  .tphoto{aspect-ratio:16/9;border-radius:12px;overflow:hidden;position:relative;
    background:linear-gradient(135deg,#eef2fd,#dbe4fb);border:1px dashed #aebfef;display:grid;place-items:center}
  .tphoto img{width:100%;height:100%;object-fit:cover}
  .tphoto .ph{text-align:center;color:var(--muted);font-size:.84rem;padding:12px;line-height:1.4}
  .tphoto .ph b{display:block;color:var(--navy);font-weight:700;margin-bottom:2px}
  .tphoto .ratio-tag{position:absolute;top:10px;right:10px;background:var(--amber);color:#3a2600;font-weight:800;font-size:.7rem;padding:3px 9px;border-radius:7px}
  .tcard .stars{color:var(--amber);letter-spacing:2px}
  .tcard blockquote{font-size:1.02rem;color:#2b3040;font-weight:500;flex:1}
  .who-row{display:flex;align-items:center;gap:12px}
  .who-row .av{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--royal),var(--amber));display:grid;place-items:center;color:#fff;font-weight:800}
  .who-row .nm{font-weight:700;color:var(--navy)}
  .who-row .rl{font-size:.85rem;color:var(--muted)}
  .tcard .who-row{order:1}
  .tcard .stars{order:2;font-size:1.05rem}
  .tcard .tphoto{order:3}
  .tcard blockquote{order:4}
  .tcarousel{position:relative}
  .tc-viewport{overflow:hidden}
  .grid3.t.tc-track{display:flex;grid-template-columns:none;gap:24px;--tc-vis:3}
  .grid3.t.tc-track>.tcard{flex:0 0 calc((100% - (var(--tc-vis) - 1) * 24px) / var(--tc-vis));box-sizing:border-box}
  .tc-arrow{position:absolute;top:42%;z-index:6;width:46px;height:46px;border-radius:50%;border:0;background:#fff;color:var(--navy);font-size:1.6rem;line-height:1;cursor:pointer;box-shadow:0 10px 24px -8px rgba(10,36,114,.45);display:grid;place-items:center}
  .tc-arrow:hover{background:var(--navy);color:#fff}
  .tc-prev{left:-6px}.tc-next{right:-6px}
  .tc-arrow[hidden]{display:none}
  @media(max-width:1024px){.grid3.t.tc-track{--tc-vis:2}}
  @media(max-width:680px){.grid3.t.tc-track{--tc-vis:1}}

  /* faq — kiểu ViAI (2 cột, số Q, mũi tên) */
  .faq{background:#fff}
  .faq .faq-title{display:flex;align-items:center;justify-content:center;gap:12px}
  .faq-ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,#f7981d,#f5a623);color:#fff;display:grid;place-items:center;flex:0 0 auto;box-shadow:0 8px 18px -6px rgba(245,166,35,.6)}
  .faq-ic svg{width:24px;height:24px}
  .faq-list{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px;align-items:start}
  @media(max-width:760px){.faq-list{grid-template-columns:1fr}}
  .fitem{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;transition:box-shadow .2s,border-color .2s}
  .fitem[open]{border-color:var(--amber);box-shadow:var(--shadow-sm)}
  .fitem summary{list-style:none;cursor:pointer;padding:18px 20px;font-weight:700;color:var(--navy);display:flex;justify-content:space-between;align-items:center;gap:14px;font-size:1rem}
  .fitem summary::-webkit-details-marker{display:none}
  .fitem summary .qn{color:var(--amber-600);font-weight:800;margin-right:7px}
  .fitem summary .chev{flex:0 0 auto;color:var(--muted);display:grid;place-items:center;transition:transform .25s}
  .fitem summary .chev svg{width:18px;height:18px;display:block}
  .fitem[open] summary .chev{transform:rotate(180deg);color:var(--royal)}
  .fitem .ans{padding:0 20px 18px;color:var(--muted);font-size:.95rem}

  /* final cta — banner card (gradient xanh -> cam) */
  .final{background:#fff}
  .final-card{position:relative;overflow:hidden;border-radius:28px;color:#fff;padding:50px 56px;box-shadow:var(--shadow);
    background:linear-gradient(105deg,#0a2472 0%,#1e40af 46%,#ef8f28 100%);
    display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center}
  @media(max-width:860px){.final-card{grid-template-columns:1fr;padding:34px 26px;gap:26px;text-align:center}}
  .final-card h2{color:#fff;font-size:clamp(1.7rem,3.6vw,2.4rem);font-weight:800;line-height:1.2}
  .final-card p{color:rgba(255,255,255,.92);margin:12px 0 0;font-size:1.06rem;max-width:none;white-space:nowrap}
  @media(max-width:860px){.final-card p{white-space:normal}}
  @media(max-width:860px){.final-card p{margin-left:auto;margin-right:auto}}
  .urgency{display:inline-flex;align-items:center;gap:12px;background:linear-gradient(90deg,#ffb020,#f59e0b);border:0;color:#1a1400;padding:14px 26px;border-radius:999px;font-weight:800;font-size:1.05rem;letter-spacing:.2px;margin-bottom:22px;box-shadow:0 10px 24px -8px rgba(245,158,11,.55),0 2px 0 rgba(0,0,0,.06) inset;text-transform:uppercase}
  .urgency .dot{background:#b3181a;box-shadow:0 0 0 0 rgba(179,24,26,.7)}
  @keyframes pulseRed{0%{box-shadow:0 0 0 0 rgba(179,24,26,.65)}70%{box-shadow:0 0 0 10px rgba(179,24,26,0)}100%{box-shadow:0 0 0 0 rgba(179,24,26,0)}}
  .urgency .dot{animation:pulseRed 1.6s infinite}
  .dot{width:9px;height:9px;border-radius:50%;background:var(--amber);box-shadow:0 0 0 0 rgba(245,166,35,.7);animation:pulse 1.6s infinite}
  @keyframes pulse{0%{box-shadow:0 0 0 0 rgba(245,166,35,.6)}70%{box-shadow:0 0 0 10px rgba(245,166,35,0)}100%{box-shadow:0 0 0 0 rgba(245,166,35,0)}}
  .mini-form{display:flex;flex-direction:column;gap:12px;background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.28);padding:22px;border-radius:18px}
  .mini-form input{width:100%;padding:15px 18px;border-radius:12px;border:0;font-family:inherit;font-size:1rem}
  .mini-form .btn{width:100%;justify-content:center;margin-top:2px}
  .guarline{margin-top:14px;color:rgba(255,255,255,.85);font-size:.86rem}
  @media(max-width:860px){.guarline{text-align:center}}

  /* footer CTA band */
  .foot-cta{background:linear-gradient(90deg,#1b3fae 0%,#2a56d6 100%)}
  .foot-cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px 40px;flex-wrap:wrap;padding:30px 20px}
  .foot-cta .txt h3{color:#fff;font-size:clamp(1.2rem,2.6vw,1.7rem);font-weight:800}
  .foot-cta .txt p{color:#cdd7f7;font-size:1rem;margin-top:4px}
  .foot-cta .btn{white-space:nowrap}

  /* footer */
  footer{background:#143180;color:#c8d1ee;font-size:.92rem}
  .foot-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1fr;gap:24px 30px;padding:48px 0 34px}
  @media(max-width:900px){.foot-main{grid-template-columns:1fr 1fr;gap:30px}}
  @media(max-width:520px){.foot-main{grid-template-columns:1fr}}
  .foot-brand .logo{color:#fff;margin-bottom:12px}
  .foot-brand .tag{color:#c3cbe6;margin-bottom:16px;font-size:.92rem;max-width:250px}
  .foot-brand .ct{display:flex;flex-direction:column;gap:9px;font-size:.92rem}
  .foot-brand .ct a,.foot-brand .ct span{display:flex;align-items:center;gap:9px;color:#c3cbe6}
  .foot-brand .ct svg{width:16px;height:16px;color:var(--amber);flex:0 0 16px}
  .foot-brand .ct a:hover{color:var(--amber)}
  .foot-social{display:flex;gap:10px;margin-top:16px}
  .foot-social a{width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.09);display:grid;place-items:center;color:#fff;transition:background .2s}
  .foot-social a:hover{background:var(--royal)}
  .foot-social svg{width:18px;height:18px}
  .foot-col h4{color:#fff;font-size:.95rem;font-weight:700;margin-bottom:14px}
  .foot-col ul{list-style:none;display:flex;flex-direction:column;gap:11px}
  .foot-col a{color:#aab4dd;font-size:.92rem;display:flex;align-items:center;gap:8px}
  .foot-col a:hover{color:var(--amber)}
  .foot-col a span{font-size:.9rem}
  .foot-col a .foot-arrow{color:#aab4dd;font-size:1rem;line-height:1;font-weight:600}
  .foot-col a:hover .foot-arrow{color:var(--amber)}
  .foot-bar{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:.86rem;color:#8b96c4}
  .foot-bar .heart{color:#ff5a6e}

  /* signup modal */
  .modal-overlay{position:fixed;inset:0;z-index:100;background:rgba(8,20,60,.6);backdrop-filter:blur(3px);display:none;align-items:center;justify-content:center;padding:20px}
  .modal-overlay.open{display:flex}
  .modal{background:#fff;border-radius:22px;max-width:440px;width:100%;padding:34px;position:relative;box-shadow:0 30px 80px -20px rgba(0,0,0,.55);animation:modalIn .25s ease}
  @keyframes modalIn{from{opacity:0;transform:translateY(16px) scale(.98)}to{opacity:1;transform:none}}
  .modal-close{position:absolute;top:12px;right:16px;background:none;border:0;font-size:1.9rem;line-height:1;color:#9aa1b4;cursor:pointer;padding:0}
  .modal-close:hover{color:var(--ink)}
  .modal-badge{display:inline-block;background:#fdeede;color:var(--amber-600);font-weight:800;font-size:.8rem;padding:6px 14px;border-radius:999px;margin-bottom:12px}
  .modal h3{font-size:1.5rem;font-weight:800;color:var(--navy)}
  .modal-body p{color:var(--muted);margin:8px 0 18px;font-size:.98rem}
  #signupFormEl{display:flex;flex-direction:column;gap:12px}
  #signupFormEl input{padding:14px 16px;border-radius:12px;border:1px solid var(--line);font-family:inherit;font-size:1rem}
  #signupFormEl input:focus{outline:2px solid var(--royal);border-color:transparent}
  #signupFormEl .btn{width:100%;justify-content:center;margin-top:4px}
  .modal-note{text-align:center;color:var(--muted);font-size:.84rem;margin-top:14px}
  .modal-success{text-align:center;padding:6px 0}
  .success-check{width:76px;height:76px;border-radius:50%;background:#e6f7ee;color:var(--ok);font-size:2.6rem;font-weight:800;display:grid;place-items:center;margin:0 auto 16px;animation:pop .3s ease}
  @keyframes pop{0%{transform:scale(0)}70%{transform:scale(1.12)}100%{transform:scale(1)}}
  .modal-success h3{color:var(--ok)}
  .modal-success p{color:var(--muted);margin:10px 0 20px}
  .modal-success .btn{width:100%;justify-content:center}

  /* floating contact bar */
  .float-contact{position:fixed;right:20px;bottom:20px;z-index:70;display:flex;flex-direction:column;gap:14px}
  .fc-btn{width:52px;height:52px;min-width:52px;min-height:52px;flex:0 0 52px;aspect-ratio:1/1;border-radius:50%;display:grid;place-items:center;color:#fff;border:0;cursor:pointer;line-height:1;
    box-shadow:0 8px 22px rgba(0,0,0,.22);transition:transform .15s ease;position:relative;text-decoration:none;box-sizing:border-box}
  .fc-btn:hover{transform:scale(1.09)}
  .fc-btn svg{width:27px;height:27px}
  .fc-btn.messenger{background:linear-gradient(135deg,#00B2FF,#006AFF)}
  .fc-btn.phone{background:#12A150}
  .fc-btn.zalo{background:#0068FF;font-weight:800;font-size:.82rem;letter-spacing:.02em}
  .fc-btn.totop{background:var(--amber);color:#3a2600;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s,transform .15s}
  .fc-btn.totop.show{opacity:1;visibility:visible}
  /* pulse ring */
  .fc-btn.pulse::before{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid currentColor;
    animation:ring 1.8s ease-out infinite;opacity:.6}
  .fc-btn.messenger.pulse::before{color:#00B2FF}
  .fc-btn.phone.pulse::before{color:#12A150}
  @keyframes ring{0%{transform:scale(1);opacity:.6}100%{transform:scale(1.7);opacity:0}}
  @media(max-width:600px){.float-contact{right:12px;bottom:12px;gap:11px}.fc-btn{width:46px;height:46px;min-width:46px;min-height:46px;flex:0 0 46px}.fc-btn svg{width:23px;height:23px}}

  @media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

  /* CARD FRAME (with icon + image slot) */
  .card-grid{gap:22px}
  .cframe{position:relative; padding:20px 18px 22px; border-radius:20px;
    transition:transform .3s, border-color .3s, box-shadow .3s}
  .cframe:hover{transform:translateY(-6px)}
  .cframe .cf-ic{width:48px; height:48px; border-radius:13px;
    display:grid; place-items:center; font-size:1.45rem; margin-bottom:14px;
    box-shadow:0 8px 18px rgba(30,64,175,.35), inset 0 1px 0 rgba(255,255,255,.2)}
  .cframe .cf-img{width:100%; aspect-ratio:1/1; border-radius:14px; overflow:hidden;
    margin-bottom:16px; display:grid; place-items:center;
    background:radial-gradient(circle at 30% 30%, rgba(91,123,224,.35), transparent 55%),
      linear-gradient(135deg, #1E40AF 0%, #0A2472 100%)}
  .cframe .cf-img img{width:100%; height:100%; object-fit:cover; display:block}
  .cframe h3{font-size:1.1rem; font-weight:700; margin:0 0 8px; line-height:1.3}
  .cframe p{font-size:.93rem; line-height:1.55; margin:0}

  /* Light theme (Problem — white section) */
  .prob .cframe{background:#fff; border:1px solid #e5eaf7;
    box-shadow:0 12px 30px -18px rgba(10,36,114,.25)}
  .prob .cframe:hover{border-color:var(--royal-300);
    box-shadow:0 22px 40px -18px rgba(30,64,175,.35)}
  .prob .cframe .cf-ic{background:linear-gradient(135deg, var(--amber), #ffb547); color:#fff}
  .prob .cframe h3{color:var(--navy)}
  .prob .cframe p{color:var(--muted)}

  /* Cam Kết — solid white cards on navy section for max contrast */
  .guar .cframe{
    background:#fff;
    border:1px solid #e5eaf7;
    box-shadow:0 26px 55px -20px rgba(0,0,0,.35), 0 0 0 1px rgba(255,255,255,.06)}
  .guar .cframe:hover{border-color:var(--amber);
    box-shadow:0 34px 60px -18px rgba(255,180,0,.35)}
  .guar .cframe .cf-img{background:
    radial-gradient(circle at 30% 30%, rgba(30,64,175,.18), transparent 55%),
    linear-gradient(135deg, #eef2ff 0%, #dbe4ff 100%)}
  .guar .cframe h3{color:var(--navy)}
  .guar .cframe p{color:var(--muted)}

  /* Problem section: 6 cards in a single row */
  .prob .prob-row{display:grid; grid-template-columns:repeat(6,1fr); gap:16px}
  .prob .prob-row .cframe{padding:14px 12px 16px; border-radius:16px}
  .prob .prob-row .cframe h3{font-size:.98rem; margin-bottom:6px}
  .prob .prob-row .cframe p{font-size:.85rem; line-height:1.5}

  /* Pain card style: red-warning border + exclamation badge */
  .prob .cframe-pain{border-color:#f4c9c9!important; position:relative;
    box-shadow:0 12px 30px -20px rgba(224,36,36,.28)}
  .prob .cframe-pain:hover{border-color:#e02424!important;
    box-shadow:0 22px 40px -18px rgba(224,36,36,.45); transform:translateY(-6px)}
  .prob .cframe-pain h3{color:#b91c1c}
  .prob .pain-dot{position:absolute; top:10px; right:10px;
    width:26px; height:26px; border-radius:50%;
    background:linear-gradient(135deg,#ef4444 0%,#dc2626 100%);
    color:#fff; font-weight:900; font-size:.95rem; line-height:26px; text-align:center;
    box-shadow:0 6px 14px rgba(220,38,38,.45), 0 0 0 3px rgba(239,68,68,.18);
    z-index:2; font-family:Georgia,serif}
  .prob .cframe-pain .cf-img{background:
    radial-gradient(circle at 30% 30%, rgba(239,68,68,.18), transparent 55%),
    linear-gradient(135deg, #fef2f2 0%, #ffe4e4 100%)}

  @media(max-width:1200px){
    .prob .prob-row{grid-template-columns:repeat(3,1fr); gap:18px}
    .prob .prob-row .cframe{padding:18px 16px 20px}
    .prob .prob-row .cframe h3{font-size:1.08rem}
    .prob .prob-row .cframe p{font-size:.92rem}
  }
  @media(max-width:900px){
    .guar .grid4{grid-template-columns:1fr 1fr; gap:18px}
    .prob .prob-row{grid-template-columns:1fr 1fr}
    .cframe .cf-img{margin-bottom:12px}
  }
  @media(max-width:560px){
    .guar .grid4, .prob .prob-row{grid-template-columns:1fr}
  }

  /* YOUTUBE VIDEO SECTION */
  .ytsec{background:#f6f8fc;padding:70px 0}
  .ytsec .sec-head{margin-bottom:32px}
  .yt-frame{position:relative;width:100%;max-width:1040px;margin:0 auto;
    aspect-ratio:16/9;border-radius:22px;overflow:hidden;
    box-shadow:0 30px 60px -25px rgba(10,36,114,.45), 0 0 0 1px rgba(30,64,175,.12);
    background:#000}
  .yt-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
  @media(max-width:900px){.ytsec{padding:50px 0}.yt-frame{border-radius:16px}}

  /* HERO SLIDER (auto 2s) */
  .hero-slider-section{padding:0!important;background:#0A2472}
  .hero-slider{position:relative;width:100%;aspect-ratio:16/6;overflow:hidden}
  .hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .4s ease}
  .hero-slide.is-active{opacity:1;z-index:1}
  .hero-slide img{width:100%;height:100%;object-fit:cover;display:block}
  .hs-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;
    width:52px;height:52px;border-radius:50%;border:0;cursor:pointer;
    background:rgba(255,255,255,.92);color:var(--navy);
    font-size:32px;line-height:1;font-weight:700;
    display:grid;place-items:center;padding:0 0 4px;
    box-shadow:0 12px 28px rgba(0,0,0,.28);
    transition:background .2s,transform .2s,box-shadow .2s}
  .hs-arrow:hover{background:#fff;transform:translateY(-50%) scale(1.08);
    box-shadow:0 16px 34px rgba(0,0,0,.35);color:var(--royal)}
  .hs-prev{left:20px}
  .hs-next{right:20px}
  .hs-dots{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);z-index:5;
    display:flex;gap:8px}
  .hs-dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.5);
    cursor:pointer;border:0;padding:0;transition:background .2s,width .2s}
  .hs-dot.is-active{background:#fff;width:28px;border-radius:5px}
  @media(max-width:900px){
    .hero-slider{aspect-ratio:16/10}
    .hs-arrow{width:42px;height:42px;font-size:26px}
    .hs-prev{left:10px}.hs-next{right:10px}
  }

  /* HERO SLIDER (2s auto) */
  .hero-slider-section{padding:0!important;background:#0A2472}
  .hero-slider{position:relative;width:100