:root{
  --green:#48D788;
  --green-dark:#117047;
  --green-deep:#0A472E;
  --green-ink:#072F1F;
  --green-soft:#EAFBF2;
  --cream:#FFDDA2;
  --cream-dark:#F1CA80;
  --cream-soft:#FFF7E9;
  --ink:#14291F;
  --muted:#5B6D63;
  --line:#DDEAE2;
  --bg:#F6FAF7;
  --card:#FFFFFF;
  --red:#D9534F;
  --radius:22px;
  --shadow-sm:0 6px 18px rgba(17,74,47,.06);
  --shadow:0 22px 60px rgba(19,73,49,.12);
  --font:"Be Vietnam Pro",Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img,video{max-width:100%;display:block}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;background:rgba(17,112,71,.08);padding:1px 6px;border-radius:6px}
h1,h2,h3,h4{font-weight:800;color:var(--green-ink)}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.ic{width:1.15em;height:1.15em;flex:none;vertical-align:-.18em}
:focus-visible{outline:3px solid var(--green);outline-offset:3px;border-radius:8px}

/* ---------- Sections ---------- */
.section{padding:88px 0}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head-row{display:flex;justify-content:space-between;gap:28px;align-items:end;margin-bottom:36px}
.eyebrow{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid #BCECCC;background:var(--green-soft);border-radius:999px;color:var(--green-dark);font-size:.76rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase}
.section-title{font-size:clamp(1.9rem,3.6vw,2.9rem);line-height:1.12;margin:14px 0 0;letter-spacing:-.03em}
.section-lead{color:var(--muted);font-size:1.06rem;margin:14px 0 0}
.section-lead.compact{max-width:420px;margin:0}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:14px;padding:13px 20px;font-weight:800;font-size:.97rem;border:1.5px solid transparent;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease;cursor:pointer;white-space:nowrap;line-height:1.2;font-family:inherit}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn.lg{padding:16px 24px;font-size:1.03rem;border-radius:16px}
.btn.small{padding:10px 15px;border-radius:12px;font-size:.9rem}
.btn.block{display:flex;width:100%}
.btn.primary{background:var(--green-deep);color:#fff;box-shadow:0 12px 26px rgba(10,71,46,.24)}
.btn.primary:hover{background:var(--green-dark);box-shadow:0 16px 32px rgba(10,71,46,.3)}
.btn.ghost{background:#fff;color:var(--green-deep);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn.ghost:hover{border-color:var(--green)}
.btn.outline{background:transparent;color:var(--green-deep);border-color:var(--green-deep)}
.btn.outline:hover{background:var(--green-deep);color:#fff}
.btn.cream{background:var(--cream);color:var(--green-ink);border-color:var(--cream-dark);box-shadow:0 10px 24px rgba(241,202,128,.35)}
.btn.cream:hover{background:#FFD487}
.btn.white-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.35)}
.btn.white-ghost:hover{background:rgba(255,255,255,.16)}
.btn.zalo{background:#0b77d5;color:#fff;margin-top:22px;box-shadow:0 10px 24px rgba(11,119,213,.25)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(246,250,247,.86);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px rgba(17,74,47,.06)}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:-.03em;font-size:1.18rem;color:var(--green-ink)}
.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(140deg,var(--green),#2FB872);display:grid;place-items:center;color:var(--green-ink);font-weight:900;font-size:.95rem;box-shadow:inset 0 -2px 0 rgba(0,0,0,.08)}
.nav-links{display:flex;align-items:center;gap:26px;color:#365648;font-weight:700;font-size:.93rem}
.nav-links a{position:relative;padding:6px 0}
.nav-links a:hover{color:var(--green-dark)}
.nav-links .mobile-only{display:none}
.nav-actions{display:flex;align-items:center;gap:8px}
.social-chip{height:40px;display:inline-flex;align-items:center;gap:7px;padding:0 11px;border-radius:12px;border:1px solid var(--line);font-weight:700;font-size:.85rem;white-space:nowrap;background:#fff;transition:transform .16s ease,box-shadow .16s ease}
.social-chip:hover{transform:translateY(-1px);box-shadow:0 7px 18px rgba(10,71,46,.09)}
.social-chip-mark{width:22px;height:22px;border-radius:7px;display:grid;place-items:center;font-size:.76rem;font-weight:900}
.zalo-group{color:#0757a8;border-color:#c7def6;background:#f5faff}
.zalo-group .social-chip-mark{background:#0b77d5;color:#fff}
.tiktok-link{color:#111;border-color:#d9d9d9}
.tiktok-link .social-chip-mark{background:#111;color:#fff}
.menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:0;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--green-ink);border-radius:2px;transition:.2s}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{padding:64px 0 40px;overflow:hidden;position:relative;background:radial-gradient(900px 500px at 92% -10%,rgba(72,215,136,.20),transparent 60%),radial-gradient(700px 420px at -10% 110%,rgba(255,221,162,.35),transparent 60%),linear-gradient(160deg,#F6FAF7 0%,#F1FCF6 60%,#FFF9EE 100%)}
.hero-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:52px;align-items:center;position:relative;z-index:1}
.release-pill{display:inline-flex;align-items:center;gap:8px;padding:6px 12px 6px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.83rem;font-weight:600;color:var(--muted);box-shadow:var(--shadow-sm)}
.release-pill b{color:var(--green-dark)}
.release-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(72,215,136,.22);animation:pulse 2s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px rgba(72,215,136,.05)}}
.hero h1{font-size:clamp(2.3rem,4.2vw,3.4rem);line-height:1.1;letter-spacing:-.045em;margin:20px 0 18px;font-weight:900}
.hero h1 .hl{background:linear-gradient(100deg,var(--green-dark),#1FA463);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-copy{font-size:1.08rem;color:var(--muted);max-width:590px;margin:0}
.hero-copy b{color:var(--ink)}
.hero-points{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:10px}
.hero-points li{display:flex;align-items:flex-start;gap:10px;font-size:.98rem;color:#2E4A3C}
.hero-points .ic{color:#fff;background:var(--green-dark);border-radius:50%;padding:3px;width:20px;height:20px;margin-top:2px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 14px}
.micro-note{display:flex;align-items:center;gap:7px;font-size:.84rem;color:var(--muted);margin:0;flex-wrap:wrap}
.micro-note .ic{color:var(--green-dark)}
.hero-grid>*{min-width:0}
.hero-media{position:relative}
.hero-video-card{background:#fff;border:1px solid rgba(10,71,46,.12);border-radius:24px;padding:10px;box-shadow:0 30px 80px rgba(19,73,49,.18)}
.video-chrome{display:flex;align-items:center;gap:12px;padding:4px 6px 10px}
.video-chrome .dots{display:flex;gap:6px}
.video-chrome .dots i{width:10px;height:10px;border-radius:50%;background:#E3ECE6}
.video-chrome .dots i:nth-child(1){background:#FF8A80}.video-chrome .dots i:nth-child(2){background:#FFD27A}.video-chrome .dots i:nth-child(3){background:#7EE2A8}
.video-label{flex:1;font-size:.78rem;font-weight:700;color:#4A6255;letter-spacing:.01em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-video-card video{width:100%;aspect-ratio:16/9;object-fit:contain;background:#EEF3F0;border-radius:16px}
.duration-pill{display:inline-flex;padding:4px 9px;border-radius:999px;background:var(--cream);color:var(--green-ink);font-size:.74rem;font-weight:800}
.float-badge{position:absolute;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px 14px;box-shadow:var(--shadow);animation:float 5s ease-in-out infinite}
.float-badge .ic{width:34px;height:34px;padding:7px;border-radius:10px;background:var(--green-soft);color:var(--green-dark)}
.float-badge b{display:block;font-size:.9rem;color:var(--green-ink);line-height:1.2}
.float-badge span{font-size:.76rem;color:var(--muted)}
.badge-a{left:-26px;bottom:-22px}
.badge-b{right:-14px;top:-24px;animation-delay:-2.5s}
.badge-b .ic{background:var(--cream-soft);color:#9A6A12}
@keyframes float{50%{transform:translateY(-6px)}}

.trust-bar{list-style:none;padding:0;margin:64px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-sm);position:relative;z-index:1}
.trust-bar li{display:flex;align-items:center;gap:12px;padding:18px 20px}
.trust-bar li+li{border-left:1px solid var(--line)}
.trust-bar .ic{width:40px;height:40px;padding:9px;border-radius:12px;background:var(--green-soft);color:var(--green-dark)}
.trust-bar b{display:block;font-size:.95rem;color:var(--green-ink);line-height:1.25}
.trust-bar span{font-size:.8rem;color:var(--muted)}

/* ---------- Compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-col{border-radius:var(--radius);padding:30px;border:1px solid var(--line)}
.compare-col.before{background:#fff}
.compare-col.after{background:linear-gradient(150deg,var(--green-deep),#0F6440);color:#E3F4EA;border-color:transparent;box-shadow:var(--shadow);position:relative;overflow:hidden}
.compare-col.after:after{content:"";position:absolute;width:240px;height:240px;border-radius:50%;background:rgba(72,215,136,.2);right:-80px;bottom:-110px}
.compare-head h3{margin:12px 0 18px;font-size:1.35rem}
.compare-col.after h3{color:#fff}
.compare .tag{display:inline-block;font-size:.74rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;padding:5px 10px;border-radius:8px;background:#FBEDEC;color:#A33A36}
.compare-col.after .tag{background:rgba(255,221,162,.18);color:var(--cream)}
.compare ul{list-style:none;margin:0;padding:0;display:grid;gap:13px;position:relative;z-index:1}
.compare li{display:flex;gap:11px;align-items:flex-start;font-size:.98rem}
.compare li .ic{width:22px;height:22px;padding:4px;border-radius:50%;margin-top:1px}
.before li{color:#4D5F55}
.before li .ic{background:#FBEDEC;color:var(--red)}
.after li .ic{background:var(--green);color:var(--green-ink)}
.after li b{color:#fff}

/* ---------- Feature videos ---------- */
.demo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.demo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s;display:flex;flex-direction:column}
.demo-card:hover{transform:translateY(-4px);box-shadow:0 18px 42px rgba(17,74,47,.12);border-color:#C6E9D3}
.demo-media{position:relative;background:linear-gradient(145deg,var(--green-soft),var(--cream-soft));padding:10px}
.demo-media video{width:100%;aspect-ratio:16/9;object-fit:contain;border-radius:14px;background:#fff;border:1px solid rgba(16,92,55,.08)}
.media-duration{position:absolute;right:18px;top:18px;z-index:2;background:rgba(10,71,46,.9);color:#fff}
.demo-body{padding:16px 20px 22px}
.demo-kicker{display:inline-flex;padding:3px 8px;border-radius:7px;background:var(--green-soft);color:var(--green-dark);font-size:.7rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;margin-bottom:8px}
.demo-kicker.cream{background:var(--cream-soft);color:#7A551B}
.demo-body h3{margin:0 0 6px;font-size:1.12rem;letter-spacing:-.015em}
.demo-body p{margin:0;color:var(--muted);font-size:.92rem;line-height:1.55}
.inline-cta{margin-top:36px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 24px;border-radius:18px;background:var(--cream-soft);border:1px dashed var(--cream-dark)}
.inline-cta p{margin:0;color:#5E4A22}
.inline-cta b{color:var(--green-ink)}

/* ---------- Pricing ---------- */
.price-grid{display:grid;grid-template-columns:1fr 1.12fr 1fr;gap:22px;align-items:stretch}
.plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:26px;padding:30px 26px;display:flex;flex-direction:column;gap:20px;box-shadow:var(--shadow-sm)}
.plan-name{display:inline-flex;align-items:center;gap:7px;font-weight:800;font-size:.95rem;color:var(--green-dark);text-transform:uppercase;letter-spacing:.05em}
.plan-price{display:flex;align-items:baseline;gap:6px;margin:12px 0 6px;flex-wrap:wrap}
.plan-price strong{font-size:2.5rem;font-weight:900;letter-spacing:-.04em;line-height:1;color:var(--green-ink)}
.plan-price span{font-weight:700;color:var(--muted);font-size:.9rem}
.plan-price small{font-weight:700;color:var(--muted);font-size:.85rem;align-self:flex-start;margin-top:6px}
.plan-desc{margin:0;color:var(--muted);font-size:.93rem}
.plan-desc.small{font-size:.85rem}
.plan-list{list-style:none;margin:0;padding:0;display:grid;gap:11px;flex:1;align-content:start}
.plan-list li{display:flex;gap:10px;align-items:flex-start;font-size:.95rem}
.plan-list .ic{width:20px;height:20px;padding:3px;border-radius:50%;background:var(--green-soft);color:var(--green-dark);margin-top:2px}
.plan .btn{margin-top:auto}
.plan-featured{background:linear-gradient(160deg,var(--green-deep),#0E5E3C);color:#DDF2E6;border-color:transparent;box-shadow:0 30px 70px rgba(10,71,46,.3);top:-12px;padding-top:38px}
.plan-featured .plan-name{color:var(--cream)}
.plan-featured .plan-price strong{color:#fff;font-size:3rem}
.plan-featured .plan-price span,.plan-featured .plan-desc{color:#BFE1CE}
.plan-featured .plan-list b{color:#fff}
.plan-featured .plan-list .ic{background:var(--green);color:var(--green-ink)}
.plan-ribbon{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--cream);color:var(--green-ink);font-size:.76rem;font-weight:900;letter-spacing:.06em;text-transform:uppercase;padding:6px 14px;border-radius:999px;box-shadow:0 8px 20px rgba(241,202,128,.45);white-space:nowrap}
.plan-note{margin:-6px 0 0;text-align:center;font-size:.8rem;color:#A9CDB9}
.plan-ai .plan-name{color:#9A6A12}
.ai-packs{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.ai-packs div{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--bg)}
.ai-packs b{display:block;font-size:.95rem;color:var(--green-ink)}
.ai-packs span{font-size:.85rem;color:var(--green-dark);font-weight:700}
.guarantee{margin:40px auto 0;max-width:900px;display:flex;gap:16px;align-items:flex-start;padding:22px 26px;border-radius:20px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.guarantee>.ic{width:46px;height:46px;padding:10px;border-radius:14px;background:var(--green-soft);color:var(--green-dark)}
.guarantee b{color:var(--green-ink)}
.guarantee p{margin:4px 0 0;color:var(--muted);font-size:.94rem}

/* ---------- Steps ---------- */
.steps-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.steps-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:30px;display:flex;flex-direction:column}
.steps-card h3{display:flex;align-items:center;gap:10px;margin:0 0 22px;font-size:1.25rem}
.steps-card h3 .ic{width:36px;height:36px;padding:8px;border-radius:11px;background:var(--green-deep);color:#fff}
.steps{list-style:none;padding:0;margin:0 0 22px;display:grid;gap:0;counter-reset:s;flex:1;align-content:start}
.steps li{counter-increment:s;position:relative;display:grid;grid-template-columns:40px 1fr;column-gap:14px;padding-bottom:20px}
.steps li:before{content:counter(s);grid-row:1/3;width:36px;height:36px;border-radius:50%;background:var(--cream);display:grid;place-items:center;font-weight:900;color:var(--green-ink);position:relative;z-index:1}
.steps li:not(:last-child):after{content:"";position:absolute;left:17px;top:38px;bottom:2px;width:2px;background:var(--line)}
.steps b{font-size:1rem;color:var(--green-ink)}
.steps span{color:var(--muted);font-size:.92rem}
.file-check{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px}
.file-check summary{cursor:pointer;font-weight:700;color:#4A6255;font-size:.9rem}
.hash{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.75rem;word-break:break-all;padding:10px;background:var(--bg);border-radius:10px;color:#3E5A4B;margin-top:10px}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start}
.faq-intro{position:sticky;top:100px}
.faq-list{display:grid;gap:12px}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 22px;transition:box-shadow .2s,border-color .2s}
.faq-list details[open]{border-color:#BFE6CE;box-shadow:var(--shadow-sm)}
.faq-list summary{list-style:none;cursor:pointer;padding:18px 32px 18px 0;font-weight:700;color:var(--green-ink);position:relative}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:var(--green-soft);color:var(--green-dark);display:grid;place-items:center;font-size:1.1rem;font-weight:800;transition:transform .2s}
.faq-list details[open] summary:after{content:"–"}
.faq-list details p{margin:0 0 18px;color:var(--muted);font-size:.96rem}
.faq-list details p b{color:var(--ink)}

/* ---------- Final CTA ---------- */
.final-cta{padding:0 0 88px}
.final-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:48px 52px;border-radius:30px;background:radial-gradient(500px 300px at 100% 100%,rgba(72,215,136,.28),transparent 70%),linear-gradient(135deg,var(--green-deep),#0E6440);box-shadow:var(--shadow);color:#D7EFE2}
.final-inner h2{color:#fff;font-size:clamp(1.6rem,3vw,2.3rem);line-height:1.15;margin:0 0 10px;letter-spacing:-.03em}
.final-inner p{margin:0;max-width:560px}
.final-actions{display:flex;gap:12px;flex-wrap:wrap;flex:none}

/* ---------- Footer ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:52px 0 0;color:var(--muted);font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.footer-brand p{margin:14px 0 0;max-width:340px}
.site-footer h4{margin:0 0 12px;font-size:.92rem;text-transform:uppercase;letter-spacing:.06em}
.site-footer .footer-grid>div:not(.footer-brand) a{display:block;padding:4px 0;cursor:pointer}
.site-footer a:hover{color:var(--green-dark)}
.footer-bottom{margin-top:40px;padding:20px 0 28px;border-top:1px solid var(--line);font-size:.85rem}

/* ---------- Floating ---------- */
.zalo-float{position:fixed;right:22px;bottom:22px;z-index:55;display:flex;align-items:center;gap:8px;background:#0b77d5;color:#fff;font-weight:800;font-size:.9rem;padding:12px 18px 12px 14px;border-radius:999px;box-shadow:0 14px 34px rgba(11,119,213,.35);transition:transform .18s;cursor:pointer}
.zalo-float:hover{transform:translateY(-2px)}
.zalo-float .ic{width:22px;height:22px}
.mobile-bar{display:none}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-media{max-width:820px}
  .badge-a{left:12px}.badge-b{right:12px}
  .trust-bar{grid-template-columns:repeat(2,1fr)}
  .trust-bar li:nth-child(3){border-left:0}
  .trust-bar li:nth-child(n+3){border-top:1px solid var(--line)}
  .demo-grid{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr 1fr}
  .plan-featured{grid-column:1/-1;grid-row:1;top:0}
  .section-head-row{align-items:start;flex-direction:column}
  .section-lead.compact{max-width:720px}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .faq-intro{position:static}
  .final-inner{flex-direction:column;align-items:flex-start;padding:40px 36px}
  .social-chip{display:none}
}
@media (max-width:820px){
  .menu-toggle{display:flex}
  .nav-links{position:absolute;left:16px;right:16px;top:70px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:10px;display:none;flex-direction:column;align-items:stretch;gap:2px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;border-radius:10px}
  .nav-links a:hover{background:var(--green-soft)}
  .nav-links .mobile-only{display:block;color:#0757a8}
  .compare,.steps-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .container{width:calc(100% - 32px)}
  .section{padding:64px 0}
  .section-head{margin-bottom:32px}
  .header-cta{display:none}
  .hero{padding:36px 0 28px}
  .hero h1{font-size:clamp(2.1rem,9vw,2.8rem)}
  .hero-actions .btn{width:100%;white-space:normal}
  .float-badge{display:none}
  .trust-bar{margin-top:40px;grid-template-columns:1fr 1fr}
  .trust-bar li{flex-direction:column;align-items:flex-start;gap:8px;padding:14px}
  .demo-grid,.price-grid{grid-template-columns:1fr}
  .plan-featured{grid-column:auto}
  .compare-col,.steps-card{padding:24px 20px}
  .inline-cta{flex-direction:column;align-items:stretch;text-align:center}
  .guarantee{flex-direction:column;padding:20px}
  .final-cta{padding-bottom:64px}
  .final-inner{padding:32px 22px;border-radius:24px}
  .final-actions,.final-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .zalo-float{display:none}
  .mobile-bar{display:grid;grid-template-columns:1.5fr 1fr;gap:8px;position:fixed;left:0;right:0;bottom:0;z-index:58;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-top:1px solid var(--line);box-shadow:0 -10px 30px rgba(17,74,47,.1);transform:translateY(110%);transition:transform .25s ease}
  .mobile-bar.show{transform:none}
  .mobile-bar .btn{padding:13px 10px;font-size:.93rem}
  body{padding-bottom:76px}
}

/* ---------- YouTube lite embeds ---------- */
.demo-grid{grid-template-columns:repeat(4,1fr);gap:20px}
.yt{position:relative;display:block;width:100%;aspect-ratio:16/9;padding:0;border:0;background:#0d1f17;cursor:pointer;overflow:hidden}
.yt img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease,filter .35s ease}
.yt:hover img{transform:scale(1.04);filter:brightness(.88)}
.yt-play{position:absolute;left:50%;top:50%;width:58px;height:58px;margin:-29px 0 0 -29px;border-radius:50%;background:rgba(10,71,46,.92);color:#fff;display:grid;place-items:center;box-shadow:0 10px 26px rgba(0,0,0,.3);transition:transform .2s ease,background .2s ease}
.yt-play .ic{width:24px;height:24px;margin-left:3px}
.yt:hover .yt-play{transform:scale(1.1);background:var(--green-dark)}
.yt .media-duration{right:10px;top:auto;bottom:10px}
.yt-frame{display:block;width:100%;aspect-ratio:16/9;border:0;background:#000}
.demo-body h3{font-size:1.04rem}
@media (max-width:1080px){.demo-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.demo-grid{grid-template-columns:1fr}}
.yt-hero{border-radius:16px}
.yt-hero .yt-play{width:76px;height:76px;margin:-38px 0 0 -38px;box-shadow:0 0 0 10px rgba(72,215,136,.28),0 14px 34px rgba(0,0,0,.35)}
.yt-hero .yt-play .ic{width:32px;height:32px}
.hero-video-card .yt-frame{border-radius:16px}