:root {
  --bg-now: #f4f7fb;
  --text: #0d1b2e;
  --muted: #56677d;
  --navy: #0b2f5b;
  --blue: #1b5fa8;
  --sky: #4f9be8;
  --mint: #1f9d63;
  --line: rgba(11, 47, 91, 0.1);
  --line-strong: rgba(27, 95, 168, 0.28);
  --card: rgba(255, 255, 255, 0.78);
  --shadow: 0 1px 2px rgba(11, 47, 91, .06), 0 12px 32px -12px rgba(11, 47, 91, .18);
  --radius: 22px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: "Be Vietnam Pro", system-ui, sans-serif;
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(ellipse 70% 50% at 85% -10%, rgba(79, 155, 232, .22), transparent 60%),
    radial-gradient(ellipse 60% 45% at -10% 30%, rgba(31, 157, 99, .08), transparent 60%),
    var(--bg-now);
  background-attachment: fixed;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, .btn, .eyebrow, .stats b, .num, .logo { font-family: "Plus Jakarta Sans", "Be Vietnam Pro", sans-serif; }
::selection { background: var(--blue); color: #fff; }

#scene { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 0; pointer-events: none; }
.sheet-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 96px 28px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
  opacity: .7;
}
main, .footer { position: relative; z-index: 2; }

/* ---------- NAV ---------- */
.nav {
  position: fixed; z-index: 50; top: 14px; left: 50%; transform: translateX(-50%);
  width: min(1200px, calc(100% - 32px));
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 8px 8px 8px 18px; border-radius: 18px;
  background: rgba(255, 255, 255, .55); border: 1px solid rgba(255, 255, 255, .6);
  backdrop-filter: blur(16px) saturate(160%); -webkit-backdrop-filter: blur(16px) saturate(160%);
  transition: background .3s, box-shadow .3s, border-color .3s;
}
.nav.scrolled { background: rgba(255, 255, 255, .86); border-color: var(--line); box-shadow: var(--shadow); }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.3rem; letter-spacing: -.03em; color: var(--navy); }
.logo img { height: 30px; width: auto; display: block; }
.logo b { color: var(--blue); font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: 2px; font-size: .92rem; }
.nav-links a:not(.btn) { color: var(--muted); padding: 8px 14px; border-radius: 10px; transition: color .2s, background .2s; }
.nav-links a:not(.btn):hover { color: var(--navy); background: rgba(27, 95, 168, .08); }
.nav-links .nav-cta-mobile { display: none; }
.nav-right { display: flex; align-items: center; gap: 8px; }
.lang-switch { display: flex; padding: 3px; border-radius: 11px; background: rgba(11, 47, 91, .06); }
.lang-switch button { border: 0; cursor: pointer; padding: 6px 10px; border-radius: 8px; font: 700 .74rem "Plus Jakarta Sans", sans-serif; letter-spacing: .04em; color: var(--muted); background: transparent; transition: .2s; }
.lang-switch button:hover { color: var(--navy); }
.lang-switch button.active { color: #fff; background: var(--navy); }
.burger { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; position: relative; }
.burger span { position: absolute; left: 10px; right: 10px; height: 2px; background: var(--navy); border-radius: 2px; transition: .3s; }
.burger span:first-child { top: 15px; } .burger span:last-child { top: 23px; }
.burger.open span:first-child { top: 19px; transform: rotate(45deg); }
.burger.open span:last-child { top: 19px; transform: rotate(-45deg); }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 24px; border-radius: 14px; border: 0; cursor: pointer;
  font-weight: 700; font-size: .96rem; color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  box-shadow: 0 10px 24px -10px rgba(11, 47, 91, .6), inset 0 1px 0 rgba(255, 255, 255, .18);
  transition: transform .25s var(--ease), box-shadow .25s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 32px -12px rgba(11, 47, 91, .7), inset 0 1px 0 rgba(255, 255, 255, .18); }
.btn .arr { display: inline-block; transition: transform .25s; }
.btn:hover .arr { transform: translateX(4px); }
.btn-sm { padding: 10px 18px; font-size: .88rem; border-radius: 12px; }
.btn-ghost { color: var(--navy); background: rgba(255, 255, 255, .8); border: 1px solid var(--line-strong); box-shadow: none; }
.btn-ghost:hover { background: #fff; box-shadow: var(--shadow); }
.btn-full { width: 100%; }

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh; min-height: 100svh;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center;
  max-width: 1240px; margin: 0 auto; padding: 130px clamp(16px, 5vw, 64px) 60px;
}
.pill {
  display: inline-flex; align-items: center; gap: 10px; padding: 7px 14px; border-radius: 999px;
  font-size: .82rem; font-weight: 500; color: var(--blue);
  background: rgba(255, 255, 255, .8); border: 1px solid var(--line-strong);
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px rgba(31, 157, 99, .15); animation: pulse 2s infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 8px rgba(31, 157, 99, 0); } }
h1 { font-size: clamp(2.4rem, 5.2vw, 4.2rem); line-height: 1.05; font-weight: 800; letter-spacing: -.04em; margin: 20px 0; color: var(--navy); text-wrap: balance; }
.hl { background: linear-gradient(100deg, var(--blue), var(--sky) 60%, var(--mint)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(1rem, 1.4vw, 1.12rem); color: var(--muted); max-width: 560px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-points { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 28px; font-size: .9rem; color: var(--muted); }
.hero-points li { padding: 4px 10px; border-radius: 8px; background: rgba(255, 255, 255, .75); backdrop-filter: blur(6px); }
.hero-points li::before { content: "✓"; color: var(--mint); font-weight: 700; margin-right: 8px; }

/* mock sheet */
.sheet-card {
  background: rgba(255, 255, 255, .92); border: 1px solid var(--line); border-radius: 20px;
  box-shadow: 0 30px 80px -30px rgba(11, 47, 91, .45), 0 2px 6px rgba(11, 47, 91, .06);
  overflow: hidden; font-size: .82rem; backdrop-filter: blur(10px);
  transform: perspective(1400px) rotateY(-8deg) rotateX(4deg); transition: transform .6s var(--ease);
}
.sheet-card:hover { transform: perspective(1400px) rotateY(-3deg) rotateX(2deg); }
.sc-top { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.sc-title { display: flex; gap: 10px; align-items: center; }
.sc-title b { display: block; font-size: .92rem; color: var(--navy); }
.sc-title small { color: var(--muted); font-size: .74rem; }
.sc-icon { width: 30px; height: 30px; border-radius: 8px; background: var(--mint); position: relative; }
.sc-icon::after { content: ""; position: absolute; inset: 8px 7px; border: 2px solid #fff; border-radius: 2px; background: linear-gradient(#fff, #fff) 50% 50% / 100% 2px no-repeat, linear-gradient(#fff, #fff) 50% 50% / 2px 100% no-repeat; }
.sync { white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; color: var(--mint); font-size: .74rem; font-weight: 600; }
.sync i { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); animation: pulse 1.6s infinite; }
.sync em { font-style: normal; color: var(--muted); font-weight: 400; }
.sc-tabs { display: flex; gap: 4px; padding: 8px 12px 0; background: #f6f8fb; border-bottom: 1px solid var(--line); }
.sc-tabs span { padding: 7px 12px; border-radius: 8px 8px 0 0; color: var(--muted); font-size: .76rem; }
.sc-tabs .on { background: #fff; color: var(--navy); font-weight: 600; box-shadow: 0 -1px 0 var(--line), 1px 0 0 var(--line), -1px 0 0 var(--line); }
.sc-table { padding: 0 6px; }
.sc-row { display: grid; grid-template-columns: 1.1fr .9fr 1.1fr .4fr 1fr 1fr; gap: 8px; align-items: center; padding: 9px 10px; border-bottom: 1px solid #eef2f7; white-space: nowrap; }
.sc-row span { overflow: hidden; text-overflow: ellipsis; }
.sc-head { color: var(--muted); font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.sc-row.new { animation: rowIn .7s var(--ease); background: rgba(79, 155, 232, .08); }
@keyframes rowIn { from { opacity: 0; transform: translateY(-10px); background: rgba(79, 155, 232, .25); } }
.mk { display: inline-block; padding: 2px 8px; border-radius: 6px; font-size: .72rem; font-weight: 600; }
.mk.shopee { background: #fff1ec; color: #e8501f; }
.mk.lazada { background: #eef0ff; color: #3646c9; }
.mk.tiktok { background: #eefcfb; color: #0b8f8a; }
.mk.shopify { background: #edf7e6; color: #4a8a1c; }
.mk.amazon { background: #fff4e0; color: #b96a00; }
.st { display: inline-flex; align-items: center; gap: 5px; font-size: .74rem; }
.st::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.st.ok { color: var(--mint); } .st.ship { color: var(--blue); } .st.wait { color: #c98a12; }
.sc-foot { display: grid; grid-template-columns: repeat(3, 1fr); background: #f6f8fb; }
.sc-foot div { padding: 12px 18px; display: grid; }
.sc-foot div + div { border-left: 1px solid var(--line); }
.sc-foot small { color: var(--muted); font-size: .72rem; }
.sc-foot b { font-family: "Plus Jakarta Sans", sans-serif; font-size: 1.15rem; color: var(--navy); }
.sc-foot b.up { color: var(--mint); }

/* ---------- STATS ---------- */
.stats {
  max-width: 1112px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--card); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); overflow: hidden;
  width: calc(100% - 32px);
}
.stats div { padding: 22px 24px; display: grid; }
.stats div + div { border-left: 1px solid var(--line); }
.stats b { font-size: 1.9rem; font-weight: 800; letter-spacing: -.03em; color: var(--blue); }
.stats em { font-style: normal; color: var(--navy); }
.stats span { color: var(--muted); font-size: .86rem; }

/* ---------- SECTIONS ---------- */
.section { padding: 120px clamp(16px, 5vw, 64px); max-width: 1240px; margin: 0 auto; }
.section-head { max-width: 720px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--blue); }
h2 { font-size: clamp(2rem, 4vw, 3.1rem); line-height: 1.1; font-weight: 800; letter-spacing: -.035em; margin: 12px 0 14px; color: var(--navy); text-wrap: balance; }
.section-head p, .apps-text > p, .contact-text p { color: var(--muted); font-size: 1.04rem; }

/* plans */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.plan {
  position: relative; display: flex; flex-direction: column; gap: 22px; padding: 30px 26px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); transition: transform .2s ease-out, border-color .3s;
}
.plan:hover { border-color: var(--line-strong); }
.plan h3 { font-size: 1.35rem; font-weight: 800; color: var(--navy); letter-spacing: -.02em; }
.plan-top p { color: var(--muted); font-size: .92rem; margin-top: 6px; }
.plan ul { list-style: none; display: grid; gap: 10px; flex: 1; font-size: .93rem; }
.plan li { display: flex; gap: 10px; }
.plan li::before { content: "✓"; flex: none; display: grid; place-items: center; width: 20px; height: 20px; margin-top: 2px; border-radius: 6px; font-size: .7rem; font-weight: 800; color: var(--blue); background: rgba(27, 95, 168, .1); }
.plan.featured { background: linear-gradient(160deg, #0f3a70, var(--navy)); color: #e7eefb; border-color: transparent; box-shadow: 0 30px 60px -25px rgba(11, 47, 91, .7); }
.plan.featured h3 { color: #fff; }
.plan.featured .plan-top p { color: #a9bedc; }
.plan.featured li::before { color: #fff; background: rgba(255, 255, 255, .16); }
.plan.featured .btn { background: #fff; color: var(--navy); }
.badge { position: absolute; top: -12px; right: 22px; padding: 5px 12px; border-radius: 999px; font-size: .74rem; font-weight: 700; color: #fff; background: linear-gradient(135deg, var(--sky), var(--mint)); }

/* apps */
.apps { display: grid; grid-template-columns: .8fr 1.2fr; gap: 72px; align-items: center; }
.phone {
  justify-self: center; width: 290px; padding: 16px 14px 18px; border-radius: 40px; background: #fff;
  border: 8px solid #0d1b2e; box-shadow: 0 40px 80px -30px rgba(11, 47, 91, .55); position: relative;
  transform: rotate(-4deg);
}
.ph-notch { width: 90px; height: 20px; border-radius: 0 0 14px 14px; background: #0d1b2e; margin: -16px auto 12px; }
.ph-head small { color: var(--muted); font-size: .72rem; }
.ph-head b { display: block; font-family: "Plus Jakarta Sans", sans-serif; font-size: 1.3rem; color: var(--navy); margin-bottom: 10px; }
.ph-search { padding: 9px 12px; border-radius: 12px; background: #f1f4f9; color: #8a99ad; font-size: .78rem; margin-bottom: 12px; }
.ph-item { display: grid; grid-template-columns: 38px 1fr auto; gap: 10px; align-items: center; padding: 9px 4px; border-bottom: 1px solid #eef2f7; font-size: .76rem; }
.ph-item b { display: block; color: var(--text); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 150px; }
.ph-item small { color: var(--muted); font-size: .68rem; }
.ph-item i { display: block; height: 4px; border-radius: 4px; margin-top: 5px; background: linear-gradient(90deg, var(--blue) var(--w), #e6ecf4 var(--w)); }
.ph-item em { font-style: normal; font-weight: 700; color: var(--navy); }
.ph-item.low em { color: #d0461c; }
.ph-item.low i { background: linear-gradient(90deg, #e8501f var(--w), #e6ecf4 var(--w)); }
.ph-thumb { width: 38px; height: 38px; border-radius: 10px; }
.t1 { background: linear-gradient(135deg, #dce8f7, #b7cff0); } .t2 { background: linear-gradient(135deg, #2b3a50, #0d1b2e); }
.t3 { background: linear-gradient(135deg, #efe4cf, #d9c39b); } .t4 { background: linear-gradient(135deg, #f5ecdc, #e8d6b5); }
.ph-scan { margin-top: 14px; padding: 12px; border-radius: 14px; text-align: center; font-weight: 700; font-size: .85rem; color: #fff; background: linear-gradient(135deg, var(--blue), var(--navy)); }
.app-feats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 28px 0 20px; }
.app-feats div { padding: 18px; border-radius: 16px; background: var(--card); border: 1px solid var(--line); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.app-feats b { display: block; color: var(--navy); margin-bottom: 4px; font-family: "Plus Jakarta Sans", sans-serif; }
.app-feats span { color: var(--muted); font-size: .88rem; }
.tools { color: var(--muted); font-size: .92rem; }
.tools b { color: var(--navy); }

/* integrations */
.integ { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; max-width: 1000px; margin: 0 auto; }
.integ-group { padding: 22px; border-radius: 20px; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.integ-group h4 { font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips span { padding: 8px 14px; border-radius: 10px; font-weight: 600; font-size: .88rem; color: var(--navy); background: #fff; border: 1px solid var(--line); transition: transform .2s, border-color .2s, color .2s; }
.chips span:hover { transform: translateY(-2px); border-color: var(--line-strong); color: var(--blue); }

/* why */
.whys { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.why { padding: 26px 22px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); transition: transform .2s ease-out; }
.wi { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; font-size: 1.3rem; color: #fff; background: linear-gradient(135deg, var(--sky), var(--blue)); margin-bottom: 18px; box-shadow: 0 10px 20px -10px rgba(27, 95, 168, .8); }
.why h3 { font-size: 1.12rem; color: var(--navy); margin-bottom: 6px; }
.why p { color: var(--muted); font-size: .92rem; }

/* steps */
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: s; }
.step { position: relative; padding: 26px 22px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.num { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; font-weight: 800; color: var(--blue); background: rgba(27, 95, 168, .1); margin-bottom: 18px; }
.step h3 { font-size: 1.1rem; color: var(--navy); margin-bottom: 6px; }
.step p { color: var(--muted); font-size: .92rem; }
.step:not(:last-child)::after { content: "→"; position: absolute; right: -14px; top: 36px; z-index: 1; width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; background: #fff; border: 1px solid var(--line); color: var(--blue); font-size: .8rem; }

/* faq */
.faq { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.faq details { border-radius: 16px; background: var(--card); border: 1px solid var(--line); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); transition: border-color .2s, box-shadow .2s; }
.faq details[open] { border-color: var(--line-strong); box-shadow: var(--shadow); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 22px; font-weight: 600; color: var(--navy); display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.3rem; line-height: 1; color: var(--blue); transition: transform .25s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 22px 20px; color: var(--muted); font-size: .95rem; }

/* contact */
.contact {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 52px; padding: clamp(28px, 5vw, 56px);
  border-radius: 28px; background: rgba(255, 255, 255, .88); border: 1px solid var(--line); box-shadow: 0 40px 90px -40px rgba(11, 47, 91, .45);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
}
.contact-info { display: grid; gap: 12px; margin-top: 28px; color: var(--muted); }
.contact-info i { font-style: normal; display: inline-grid; place-items: center; width: 32px; height: 32px; margin-right: 10px; border-radius: 10px; background: rgba(27, 95, 168, .1); color: var(--blue); }
.contact-info a:hover { color: var(--navy); }
.form { display: grid; gap: 14px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form label { display: grid; gap: 7px; font-size: .84rem; font-weight: 500; color: var(--muted); }
.form input, .form select, .form textarea {
  width: 100%; padding: 13px 14px; border-radius: 12px; font: inherit; font-size: .95rem; color: var(--text);
  background: #f6f8fb; border: 1px solid var(--line); outline: none; transition: border-color .2s, box-shadow .2s, background .2s;
}
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--blue); background: #fff; box-shadow: 0 0 0 4px rgba(27, 95, 168, .12); }
.form-note { font-size: .88rem; color: var(--mint); min-height: 1.2em; }

/* footer */
.footer { max-width: 1240px; margin: 0 auto; padding: 60px clamp(16px, 5vw, 64px) 28px; border-top: 1px solid var(--line); }
.footer-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 36px; }
.footer-top p { color: var(--muted); margin-top: 12px; font-size: .92rem; max-width: 320px; }
.footer-cols { display: flex; gap: 72px; }
.footer-cols div { display: grid; gap: 10px; align-content: start; font-size: .92rem; }
.footer-cols h4 { font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--blue); margin-bottom: 4px; }
.footer-cols a { color: var(--muted); }
.footer-cols a:hover { color: var(--navy); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; margin-top: 48px; color: var(--muted); font-size: .85rem; }

/* reveal */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.sheet-card.reveal.in { transform: perspective(1400px) rotateY(-8deg) rotateX(4deg); }
.plans .reveal:nth-child(2), .whys .reveal:nth-child(2), .steps .reveal:nth-child(2) { transition-delay: .08s; }
.plans .reveal:nth-child(3), .whys .reveal:nth-child(3), .steps .reveal:nth-child(3) { transition-delay: .16s; }
.whys .reveal:nth-child(4), .steps .reveal:nth-child(4) { transition-delay: .24s; }

/* responsive */
@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr; padding-top: 120px; }
  .plans, .whys { grid-template-columns: repeat(2, 1fr); }
  .plans .featured { grid-column: span 2; order: -1; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
  .apps, .contact { grid-template-columns: 1fr; }
  .apps { gap: 48px; }
}
@media (max-width: 860px) {
  .burger { display: block; }
  .nav-cta { display: none; }
  .nav-links {
    position: fixed; top: 66px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 2px;
    padding: 12px; border-radius: 18px; background: rgba(255, 255, 255, .97); border: 1px solid var(--line); box-shadow: var(--shadow);
    opacity: 0; pointer-events: none; transform: translateY(-10px); transition: .25s;
  }
  .nav-links.open { opacity: 1; pointer-events: auto; transform: none; }
  .nav-links a:not(.btn) { padding: 12px 14px; }
  .nav-links .nav-cta-mobile { display: inline-flex; margin-top: 6px; }
}
@media (max-width: 640px) {
  .plans, .whys, .steps, .integ, .app-feats, .form .row { grid-template-columns: 1fr; }
  .plans .featured { grid-column: auto; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stats div:nth-child(3) { border-left: 0; }
  .stats div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .section { padding-top: 80px; padding-bottom: 80px; }
  .sc-row { grid-template-columns: 1fr .9fr .4fr 1fr 1fr; }
  .sc-row span:nth-child(3) { display: none; }
  .sheet-card, .sheet-card.reveal.in { transform: none; }
  .sync em { display: none; }
  .footer-cols { gap: 40px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* chữ tiêu đề luôn nổi trên nền 3D */
h1, h2, .section-head p, .lead { text-shadow: 0 0 18px rgba(244, 247, 251, .95), 0 0 36px rgba(244, 247, 251, .8); }
.hl { text-shadow: none; filter: drop-shadow(0 0 14px rgba(244, 247, 251, .9)); }

/* chân trang có nền mờ để chữ không lẫn với các ô 3D */
.footer { background: rgba(244, 247, 251, .86); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-radius: 24px 24px 0 0; border: 1px solid var(--line); border-bottom: 0; }