:root{
  --bg:#f8f4ee;
  --bg-soft:#fbf8f3;
  --card:rgba(255,255,255,.82);
  --line:#e2d8c8;
  --line-strong:#d1c3ae;
  --text:#28160f;
  --muted:#6a5549;
  --primary:#2b7bea;
  --primary-2:#6a58f5;
  --primary-soft:#edf4ff;
  --success:#2f9d73;
  --success-soft:#eefbf6;
  --gold:#ffb938;
  --gold-soft:#fff6df;
  --rose:#e95589;
  --rose-soft:#fff0f6;
  --warm:#4a210d;
  --shadow:0 22px 50px rgba(67,42,18,.10);
  --radius-xl:30px;
  --radius-lg:22px;
  --radius-md:18px;
  --container:min(1160px, calc(100% - 40px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(90,120,255,.08), transparent 22%),
    radial-gradient(circle at 85% 12%, rgba(43,123,234,.09), transparent 18%),
    linear-gradient(180deg,#fcfaf7 0%,#f7f1e8 100%);
  color:var(--text);line-height:1.65;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
.container{width:var(--container);margin:0 auto}

.site-header{
  position:sticky;top:0;z-index:100;background:rgba(252,249,244,.9);
  backdrop-filter:blur(14px);border-bottom:1px solid rgba(209,195,174,.65)
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:78px}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.brand-logo{
  width:46px;height:46px;object-fit:contain;border-radius:16px;
  filter: drop-shadow(0 10px 18px rgba(72,103,255,.16));
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-size:1.2rem}
.brand-text small{color:var(--muted);margin-top:4px}
.menu-toggle{
  display:none;border:none;background:transparent;width:44px;height:44px;border-radius:14px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px
}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--text);border-radius:999px}
.nav{display:flex;align-items:center;gap:8px}
.nav-link,.dropdown-toggle,.nav-cta{
  padding:11px 14px;border-radius:14px;font-weight:700;color:var(--muted);transition:.22s ease
}
.nav-link:hover,.dropdown-toggle:hover,.dropdown:hover > .dropdown-toggle{background:#fff;color:var(--text)}
.nav-cta{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 14px 28px rgba(57,99,238,.22)}
.dropdown{position:relative;padding-bottom:16px;margin-bottom:-16px}
.dropdown-menu{
  position:absolute;top:calc(100% - 6px);left:0;min-width:290px;padding:12px;
  background:rgba(255,255,255,.97);border:1px solid rgba(209,195,174,.8);border-radius:20px;
  box-shadow:var(--shadow);display:none
}
.dropdown-menu::before{
  content:"";position:absolute;left:18px;top:-14px;width:70px;height:18px;
}
.dropdown-link{
  display:block;padding:11px 14px;border-radius:14px;color:var(--muted);font-weight:600
}
.dropdown-link:hover,.dropdown-link.active{background:var(--primary-soft);color:var(--primary)}
.dropdown-all{margin-top:6px;border-top:1px dashed var(--line);padding-top:14px}
.dropdown.open .dropdown-menu,.dropdown:hover .dropdown-menu,.dropdown:focus-within .dropdown-menu{display:block}

.hero{
  padding:92px 0 70px;
  background:
    radial-gradient(circle at 80% 20%, rgba(43,123,234,.14), transparent 18%),
    radial-gradient(circle at 16% 8%, rgba(106,88,245,.12), transparent 18%);
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:34px;align-items:center}
.kicker,.eyebrow,.note{
  display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);
  background:rgba(255,255,255,.88);padding:10px 14px;border-radius:999px;
  color:var(--primary);font-weight:800;font-size:.85rem;letter-spacing:.03em
}
.hero h1,.subhero h1{font-size:clamp(2.6rem,5vw,4.8rem);line-height:1.03;letter-spacing:-.04em;margin:18px 0 18px}
.hero p,.subhero p{font-size:1.08rem;color:var(--muted);max-width:680px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 22px;border-radius:18px;
  font-weight:800;border:1px solid var(--line);background:#fff;color:var(--text);transition:.22s ease
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;border:none;box-shadow:0 16px 34px rgba(57,99,238,.24)}
.btn-soft{background:#fffdfa}
.btn-dark{background:var(--warm);border:none;color:#fff}
.hero-panel{
  position:relative;background:rgba(255,255,255,.72);border:1px solid rgba(209,195,174,.72);
  border-radius:34px;padding:28px;box-shadow:var(--shadow);overflow:hidden
}
.hero-panel::before{
  content:"";position:absolute;inset:auto -40px -40px auto;width:220px;height:220px;border-radius:999px;
  background:radial-gradient(circle, rgba(43,123,234,.18), transparent 70%);
}
.hero-orbit{
  position:absolute;right:20px;top:18px;width:180px;height:180px;border-radius:999px;border:2px solid rgba(106,88,245,.26);
}
.hero-orbit::before,.hero-orbit::after{
  content:"";position:absolute;inset:0;border-radius:999px;border:2px solid rgba(43,123,234,.2);transform:rotate(58deg)
}
.hero-orbit::after{transform:rotate(-34deg)}
.hero-logo{
  width:108px;height:108px;object-fit:contain;margin-bottom:18px;filter:drop-shadow(0 18px 32px rgba(57,99,238,.18))
}
.metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:22px}
.metric-card{
  background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:20px;padding:18px
}
.metric-card strong{display:block;font-size:1.5rem}
.muted{color:var(--muted)}

.section{padding:82px 0}
.section-alt{background:rgba(255,251,245,.55);border-top:1px solid rgba(209,195,174,.55);border-bottom:1px solid rgba(209,195,174,.55)}
.section-head{max-width:760px;margin-bottom:34px}
.section-head h2{font-size:clamp(1.9rem,3vw,3rem);line-height:1.12;margin:10px 0 12px}
.section-head p{margin:0;color:var(--muted)}
.center{text-align:center}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{
  position:relative;background:var(--card);border:1px solid rgba(209,195,174,.74);border-radius:28px;padding:26px;box-shadow:var(--shadow)
}
.card h3{margin:12px 0 8px;font-size:1.25rem;line-height:1.2}
.card p{margin:0;color:var(--muted)}
.icon-badge{
  width:46px;height:46px;border-radius:16px;display:grid;place-items:center;background:var(--primary-soft);
  color:var(--primary);font-weight:900;box-shadow:inset 0 0 0 1px rgba(43,123,234,.12)
}
.service-card{display:flex;flex-direction:column;gap:18px}
.service-card .service-top{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
.badge{
  display:inline-flex;align-items:center;padding:7px 12px;border-radius:999px;font-weight:800;font-size:.78rem;
  background:var(--primary-soft);color:var(--primary)
}
.price{font-size:1.7rem;font-weight:900;line-height:1.05;letter-spacing:-.03em}
.service-card ul,.feature-list,.check-list{margin:0;padding-left:20px;color:var(--muted)}
.feature-list li,.check-list li{margin:4px 0}
.card-footer{margin-top:auto;padding-top:10px}
.accent-blue .badge{background:var(--primary-soft);color:var(--primary)}
.accent-violet .badge{background:#f1eeff;color:#7150ff}
.accent-green .badge{background:var(--success-soft);color:var(--success)}
.accent-gold .badge{background:var(--gold-soft);color:#9f6d00}
.accent-rose .badge{background:var(--rose-soft);color:var(--rose)}

.quick-price{
  display:grid;grid-template-columns:repeat(5,1fr);gap:18px
}
.quick-price .card{padding:22px}
.price-tag{
  font-size:1.35rem;font-weight:900;letter-spacing:-.03em;margin-top:8px
}
.compare-table{
  overflow:auto;border-radius:26px;border:1px solid rgba(209,195,174,.78);box-shadow:var(--shadow);background:#fff
}
.compare-table table{width:100%;border-collapse:collapse;min-width:740px}
.compare-table th,.compare-table td{padding:18px;border-bottom:1px solid rgba(209,195,174,.56);text-align:left;vertical-align:top}
.compare-table th{background:#efe6d4;font-size:.95rem}
.compare-table td strong{display:block}
.label-free{background:#f0f0f0}
.label-business{background:#efeaff}
.label-plus{background:#fff3db}
.label-edu{background:#ecfff5}
.label-other{background:#fff0f6}
.tagline-bar{
  margin-top:18px;padding:16px 20px;border-radius:18px;background:linear-gradient(135deg,#f0f7ff,#fff8ef);border:1px solid var(--line);font-weight:700;color:var(--muted)
}

.proof-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px
}
.proof-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)
}
.proof-card img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:18px}
.proof-card small{display:block;margin-top:10px;color:var(--muted);font-weight:700}
.proof-button,.gallery-thumb{
  border:none;padding:0;margin:0;background:transparent;cursor:pointer;text-align:left;color:inherit;font:inherit
}
.proof-button{padding:14px;transition:transform .22s ease, box-shadow .22s ease}
.proof-button:hover,.gallery-thumb:hover{transform:translateY(-3px)}
.gallery-shell{display:grid;gap:18px}
.gallery-toolbar{display:flex;align-items:center;justify-content:center}
.gallery-meta{margin:0;color:var(--muted);max-width:880px;text-align:center}
.gallery-actions{display:flex;justify-content:center}
.gallery-chip{
  position:absolute;right:26px;top:26px;display:inline-flex;align-items:center;padding:7px 11px;border-radius:999px;
  background:rgba(255,255,255,.94);border:1px solid rgba(209,195,174,.82);font-size:.75rem;font-weight:800;color:var(--primary)
}
.gallery-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:16px
}
.gallery-thumb{position:relative;display:block;overflow:hidden;border-radius:22px;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.gallery-thumb img{
  width:100%;aspect-ratio:4/5;object-fit:cover;background:#fff;transition:transform .28s ease, filter .28s ease
}
.gallery-thumb:hover img{transform:scale(1.03);filter:brightness(.92)}
.gallery-thumb-overlay{
  position:absolute;left:12px;right:12px;bottom:12px;display:grid;gap:4px;padding:12px 14px;border-radius:16px;
  background:linear-gradient(180deg, rgba(37,21,11,.05), rgba(37,21,11,.72));color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.16)
}
.gallery-thumb-overlay strong{font-size:.94rem;line-height:1.2}
.gallery-thumb-overlay small{font-size:.76rem;opacity:.92}
.lightbox[hidden]{display:none!important}
.lightbox{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:20px}
.lightbox-backdrop{position:absolute;inset:0;background:rgba(15,11,8,.82);backdrop-filter:blur(8px)}
.lightbox-dialog{position:relative;z-index:1;width:min(1040px, 100%);display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px}
.lightbox-figure{margin:0;background:#fff;border-radius:26px;padding:18px;box-shadow:var(--shadow);overflow:hidden}
.lightbox-image{width:100%;max-height:min(80vh, 820px);object-fit:contain;border-radius:18px;background:#f7f1e8}
.lightbox-caption{display:flex;justify-content:space-between;gap:14px;align-items:center;padding-top:12px;color:var(--muted);font-weight:700}
.lightbox-caption strong{color:var(--text)}
.lightbox-close,.lightbox-nav{
  border:none;cursor:pointer;display:grid;place-items:center;background:rgba(255,255,255,.94);color:var(--text);box-shadow:var(--shadow)
}
.lightbox-close{
  position:absolute;top:-14px;right:-14px;width:48px;height:48px;border-radius:16px;font-size:1.8rem;line-height:1;z-index:2
}
.lightbox-nav{width:56px;height:56px;border-radius:18px;font-size:2rem}
body.lightbox-open{overflow:hidden}
.timeline{display:grid;gap:18px}
.timeline-step{
  display:grid;grid-template-columns:auto 1fr;gap:16px;padding:22px;border-radius:24px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)
}
.timeline-step .number{
  width:48px;height:48px;border-radius:16px;background:var(--primary-soft);display:grid;place-items:center;color:var(--primary);font-weight:900
}
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:24px;padding:28px 30px;border-radius:30px;
  background:linear-gradient(135deg,#eef5ff,#fff8ef 65%,#fef0f6);border:1px solid rgba(209,195,174,.72);box-shadow:var(--shadow)
}
.sep{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);margin:38px 0}

.subhero{
  padding:82px 0 48px;background:
    radial-gradient(circle at 86% 12%, rgba(43,123,234,.13), transparent 22%),
    linear-gradient(180deg,#faf7f1 0%,#f5efe6 100%)
}
.service-hero-grid{display:grid;grid-template-columns:1.14fr .86fr;gap:28px;align-items:start}
.price-box{
  background:rgba(255,255,255,.86);border:1px solid rgba(209,195,174,.8);border-radius:28px;padding:26px;box-shadow:var(--shadow)
}
.price-lg{font-size:2.5rem;font-weight:900;letter-spacing:-.04em}
.highlight-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
.highlight-list li{padding:14px 16px;border-radius:18px;border:1px solid var(--line);background:var(--bg-soft);font-weight:700;color:var(--muted)}
.inline-card{
  display:flex;align-items:flex-start;gap:14px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:20px
}
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.faq-item{border:1px solid var(--line);background:#fff;border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.faq-question{cursor:pointer;padding:18px 20px;font-weight:800;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq-answer{display:none;padding:0 20px 18px;color:var(--muted)}
.faq-item.open .faq-answer{display:block}
.faq-item.open .faq-question{color:var(--primary)}
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)
}
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:20px}
.contact-box{background:#f6eee1;border-radius:18px;padding:18px;border:1px solid rgba(209,195,174,.45)}
.about-stage{
  position:relative;min-height:100%;display:grid;place-items:center;border-radius:30px;background:
    radial-gradient(circle at 20% 20%, rgba(106,88,245,.13), transparent 18%),
    radial-gradient(circle at 78% 70%, rgba(43,123,234,.12), transparent 22%),
    linear-gradient(180deg,#fbfdff 0%,#f6f0ea 100%);
  border:1px solid rgba(209,195,174,.72);box-shadow:var(--shadow);padding:34px;overflow:hidden
}
.about-stage::after{
  content:"";position:absolute;inset:22px;border:1px dashed rgba(106,88,245,.18);border-radius:24px
}
.about-stage .stage-card{
  position:relative;z-index:1;background:rgba(255,255,255,.86);padding:26px;border-radius:26px;border:1px solid rgba(209,195,174,.72);max-width:420px
}
.about-stage img{width:94px;height:94px;object-fit:contain;margin-bottom:16px}
.legal-layout{display:grid;grid-template-columns:280px 1fr;gap:34px}
.legal-toc{position:sticky;top:96px;align-self:start}
.legal-toc .card{padding:22px}
.legal-toc h3{margin:0 0 12px;font-size:.95rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.legal-toc a{display:block;padding:11px 14px;border-radius:14px;color:var(--muted);font-weight:700}
.legal-toc a.active,.legal-toc a:hover{background:var(--primary-soft);color:var(--primary)}
.legal-content section{scroll-margin-top:100px;margin-bottom:46px}
.legal-content h2{font-size:1.9rem;line-height:1.12;margin:10px 0 12px}
.legal-content h3{font-size:1.08rem;margin:22px 0 10px}
.legal-content p,.legal-content li{color:var(--muted)}
.legal-content ul{padding-left:22px}
.table-wrap{overflow:auto;border-radius:24px;border:1px solid rgba(209,195,174,.74);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{padding:16px 18px;border-bottom:1px solid rgba(209,195,174,.56);text-align:left;vertical-align:top}
th{background:#e8dfca}
.callout{
  border-left:4px solid var(--primary);background:#eef5ff;padding:18px 20px;border-radius:0 18px 18px 0;color:var(--muted);margin-top:16px
}
.site-footer{margin-top:84px;background:linear-gradient(180deg,var(--warm),#2f1206);color:#f6e4d2}
.footer-grid{display:grid;grid-template-columns:1.25fr .9fr 1fr;gap:32px;padding:58px 0 28px}
.footer-brand{display:flex;gap:16px;align-items:flex-start}
.footer-brand img{width:54px;height:54px;border-radius:18px;object-fit:contain;background:rgba(255,255,255,.06);padding:6px}
.footer-brand p,.footer-links a,.footer-contact li,.footer-contact a{color:#e6c9ae}
.footer-links,.footer-contact{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.site-footer h3{margin-top:0;color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0 34px;display:flex;justify-content:space-between;gap:18px;align-items:center;color:#e6c9ae;font-size:.92rem}
.footer-bottom-links{display:flex;gap:18px;flex-wrap:wrap}

.floating-stack{
  position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;align-items:flex-end;gap:10px;z-index:120
}
.float-circle{
  position:relative;width:66px;height:66px;border-radius:999px;display:grid;place-items:center;
  color:#fff;font-weight:900;box-shadow:0 16px 30px rgba(57,99,238,.22);overflow:visible
}
.float-facebook{background:linear-gradient(135deg,#5ea2ff,#2b6fff)}
.float-zalo{background:linear-gradient(135deg,#44d2ff,#2577ff);font-size:.92rem}
.float-circle::before,.float-circle::after{
  content:"";position:absolute;inset:-6px;border-radius:999px;border:2px solid rgba(78,157,255,.30);animation:pulse 2.4s infinite
}
.float-circle::after{inset:-12px;animation-delay:.35s}
.float-call{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-width:140px;padding:12px 18px;border-radius:999px;
  background:linear-gradient(180deg,#ffc81c,#ffb400);color:#fff;border:1px solid rgba(255,255,255,.35);box-shadow:0 18px 32px rgba(255,180,0,.26)
}
.float-call span{font-size:.88rem;font-weight:700}
.float-call strong{font-size:1rem;line-height:1}
@keyframes pulse{
  0%{transform:scale(.96);opacity:.9}
  70%{transform:scale(1.12);opacity:0}
  100%{transform:scale(1.12);opacity:0}
}
.mobile-cta-bar{
  position:fixed;left:0;right:0;bottom:0;display:none;grid-template-columns:repeat(3,1fr);gap:8px;padding:10px 12px;
  background:rgba(255,249,242,.96);backdrop-filter:blur(14px);border-top:1px solid rgba(209,195,174,.8);z-index:140
}
.mobile-cta-bar a{
  display:flex;align-items:center;justify-content:center;padding:13px 10px;border-radius:14px;background:#fff;border:1px solid var(--line);font-weight:800
}
.mobile-cta-bar a:first-child{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;border:none}
.empty-card{
  min-height:260px;display:grid;place-items:center;text-align:center;background:linear-gradient(180deg,#fffdfa,#f7efe5)
}
.empty-card p{max-width:440px}
.back-home{
  display:inline-flex;align-items:center;gap:10px;margin-top:20px;color:var(--primary);font-weight:800
}
.nav-link.is-active,.dropdown-toggle.is-active{color:var(--text);background:#fff}
@media (max-width:1100px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .gallery-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1050px){
  .lightbox-dialog{grid-template-columns:1fr;gap:12px}
  .lightbox-nav{position:absolute;top:50%;transform:translateY(-50%);z-index:2}
  .lightbox-nav.prev{left:10px}
  .lightbox-nav.next{right:10px}
}
@media (max-width:1024px){
  .hero-grid,.grid-3,.grid-2,.service-hero-grid,.footer-grid,.contact-grid,.legal-layout,.quick-price,.faq-grid{grid-template-columns:1fr}
  .proof-grid{grid-template-columns:repeat(2,1fr)}
  .legal-toc{position:relative;top:auto}
}
@media (max-width:900px){
  .menu-toggle{display:flex}
  .nav{
    position:absolute;top:78px;left:0;right:0;background:rgba(255,251,245,.98);border-bottom:1px solid rgba(209,195,174,.72);
    padding:16px 18px;display:none;flex-direction:column;align-items:stretch
  }
  .nav.open{display:flex}
  .nav-link,.dropdown-toggle,.nav-cta{width:100%;text-align:left}
  .dropdown{padding-bottom:0;margin-bottom:0}
  .dropdown-menu{position:static;display:none;min-width:0;box-shadow:none;border:none;padding:8px 0 0;background:transparent}
  .dropdown.open .dropdown-menu{display:block}
  .floating-stack{display:none}
  .mobile-cta-bar{display:grid}
  body{padding-bottom:72px}
}
@media (max-width:640px){
  .container{width:min(100% - 24px, 1160px)}
  .hero{padding:60px 0 56px}
  .header-inner{min-height:70px}
  .brand-text strong{font-size:1.04rem}
  .brand-text small{font-size:.75rem}
  .hero-actions,.cta-band,.footer-bottom,.lightbox-caption{flex-direction:column;align-items:flex-start}
  .metric-grid,.proof-grid,.gallery-grid,.grid-4{grid-template-columns:1fr}
  .compare-table table{min-width:620px}
  .contact-grid{grid-template-columns:1fr}
  .gallery-chip{top:22px;right:22px}
  .lightbox{padding:12px}
  .lightbox-figure{padding:12px}
  .lightbox-nav{width:48px;height:48px;border-radius:16px}
}