:root {
  --green: #00ab55;
  --green-dark: #007b3d;
  --green-bg: #ebf8f2;
  --ink: #1c2b25;
  --muted: #5f6f68;
  --line: #e3ebe7;
  --bg: #ffffff;
  --bg-alt: #f5f9f7;
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -0.02em; }
.wrap { width: min(1160px, 100% - 32px); margin: 0 auto; }
.narrow { width: min(760px, 100% - 32px); }

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; color: var(--muted); font-weight: 500; font-size: 15px; }
.nav-links a:hover { color: var(--green); }
.btn { display: inline-flex; align-items: center; justify-content: center; background: var(--green); color: #fff; font-weight: 600; border-radius: 999px; padding: 12px 22px; transition: background 0.2s; }
.btn:hover { background: var(--green-dark); }
.btn-sm { padding: 8px 18px; font-size: 15px; }

/* Hero */
.hero { background: radial-gradient(1200px 500px at 85% 20%, #d6f3e4 0%, transparent 60%), linear-gradient(180deg, var(--green-bg), #fff); overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; padding: 72px 0 80px; }
.pill { display: inline-block; background: #fff; border: 1px solid #cdeedd; color: var(--green-dark); font-size: 14px; font-weight: 600; padding: 6px 14px; border-radius: 999px; }
.hero h1 { font-size: clamp(34px, 5vw, 56px); font-weight: 800; margin: 18px 0 16px; }
.hero h1 em { font-style: normal; color: var(--green); }
.lead { font-size: 18px; color: var(--muted); max-width: 560px; margin: 0 0 28px; }
.stores { display: flex; flex-wrap: wrap; gap: 12px; }
.stores.center { justify-content: center; }
.store { display: inline-flex; align-items: center; gap: 10px; background: var(--ink); color: #fff; padding: 10px 18px 10px 14px; border-radius: 12px; min-width: 168px; transition: transform 0.2s; }
.store:hover { transform: translateY(-2px); }
.store svg { width: 26px; height: 26px; flex: none; }
.store span { display: flex; flex-direction: column; line-height: 1.15; font-weight: 600; font-size: 17px; white-space: nowrap; }
.store small { font-size: 11px; font-weight: 400; opacity: 0.8; }
.store.light { background: #fff; color: var(--ink); }
.hero-points { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--muted); font-size: 15px; }
.hero-points li::before { content: "✓"; color: var(--green); font-weight: 800; margin-right: 8px; }
.hero-phones { position: relative; height: 600px; }
.hero-phones .phone { position: absolute; width: 270px; }
.phone-front { right: 40px; top: 10px; z-index: 2; }
.phone-back { right: 250px; top: 70px; transform: rotate(-6deg); opacity: 0.95; }

/* Phone frame */
.phone { background: #111; border-radius: 40px; padding: 9px; box-shadow: 0 30px 60px -20px rgba(0, 60, 30, 0.35), 0 0 0 1px rgba(0, 0, 0, 0.06); }
.phone img { border-radius: 32px; width: 100%; aspect-ratio: 1206 / 2622; object-fit: cover; background: #eee; }

/* Strip */
.strip { background: var(--green); color: #fff; }
.strip-inner { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding: 28px 0; }
.strip b { display: block; font-size: 18px; }
.strip span { opacity: 0.88; font-size: 15px; }

/* Sections */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); }
.section-head { text-align: center; margin-bottom: 56px; }
.eyebrow { display: inline-block; color: var(--green); font-weight: 700; font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }
.section h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; }

/* Features */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding: 40px 0; }
.feature + .feature { border-top: 1px solid var(--line); }
.feature.reverse .feature-text { order: 2; }
.num { display: inline-block; font-weight: 800; color: var(--green); background: var(--green-bg); border-radius: 10px; padding: 4px 10px; font-size: 14px; margin-bottom: 14px; }
.feature h3 { font-size: clamp(24px, 2.8vw, 32px); font-weight: 800; margin-bottom: 14px; }
.feature p { color: var(--muted); font-size: 17px; margin: 0 0 18px; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.checks li { position: relative; padding-left: 30px; }
.checks li::before { content: ""; position: absolute; left: 0; top: 4px; width: 20px; height: 20px; border-radius: 50%; background: var(--green-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%2300ab55' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center / 14px no-repeat; }
.feature-media { display: flex; justify-content: center; }
.feature-media .phone { width: 290px; }
.feature-media.duo { position: relative; justify-content: center; padding-right: 110px; }
.feature-media.duo .phone.small { position: absolute; width: 210px; right: 0; bottom: -30px; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.steps li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.step-n { display: inline-flex; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: 12px; background: var(--green); color: #fff; font-weight: 800; margin-bottom: 16px; }
.steps h3 { font-size: 20px; margin-bottom: 8px; }
.steps p { margin: 0; color: var(--muted); }

/* Showcase – khu "Giao diện": băng chuyền */
.showcase { background: linear-gradient(180deg, #fff 0%, var(--bg-alt) 100%); overflow: hidden; padding-bottom: 72px; }
.showcase .section-head { margin-bottom: 8px; }
.sc-tabs { display: inline-flex; gap: 4px; margin-top: 28px; padding: 5px; background: #fff; border: 1px solid var(--line); border-radius: 999px; box-shadow: 0 6px 20px -12px rgba(0, 60, 30, 0.35); }
.sc-tab { border: 0; background: transparent; font: inherit; font-weight: 600; font-size: 15px; color: var(--muted); padding: 10px 22px; border-radius: 999px; cursor: pointer; transition: background 0.25s, color 0.25s; }
.sc-tab:hover { color: var(--ink); }
.sc-tab.is-active { background: var(--green); color: #fff; }
.sc-panel { animation: sc-in 0.45s ease both; }
.sc-panel[hidden] { display: none; }
@keyframes sc-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.sc-viewport { position: relative; max-width: 1400px; margin: 0 auto; -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 12%, #000 88%, transparent 100%); mask-image: linear-gradient(90deg, transparent 0, #000 12%, #000 88%, transparent 100%); }
.sc-track { display: flex; gap: 28px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 36px calc(50% - 140px) 44px; scrollbar-width: none; overscroll-behavior-x: contain; }
.sc-track::-webkit-scrollbar { display: none; }
.sc-slide { flex: none; width: 280px; scroll-snap-align: center; cursor: pointer; transform-origin: 50% 60%; transition: transform 0.18s ease-out, opacity 0.18s ease-out; will-change: transform; }
.sc-slide.is-active { cursor: default; }
.sc-slide .phone { transition: box-shadow 0.3s; }
.sc-slide.is-active .phone { box-shadow: 0 40px 70px -24px rgba(0, 90, 45, 0.45), 0 0 0 1px rgba(0, 0, 0, 0.06); }
.sc-nav { position: absolute; top: 50%; z-index: 20; width: 52px; height: 52px; margin-top: -26px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: #fff; color: var(--ink); cursor: pointer; box-shadow: 0 10px 26px -12px rgba(0, 60, 30, 0.45); transition: transform 0.2s, background 0.2s, color 0.2s; }
.sc-nav svg { width: 22px; height: 22px; }
.sc-nav:hover { background: var(--green); color: #fff; transform: scale(1.06); }
.sc-prev { left: calc(50% - 250px); }
.sc-next { right: calc(50% - 250px); }
.sc-caption { text-align: center; max-width: 520px; margin: 0 auto; padding: 0 16px; min-height: 92px; }
.sc-count { display: inline-block; font-size: 13px; font-weight: 700; color: var(--green); background: var(--green-bg); border-radius: 999px; padding: 3px 12px; margin-bottom: 8px; }
.sc-caption b { display: block; font-size: 22px; font-weight: 800; }
.sc-caption small { display: block; font-size: 16px; color: var(--muted); margin-top: 4px; }
.sc-dots { display: flex; justify-content: center; gap: 8px; margin-top: 18px; }
.sc-dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 999px; background: #c9d8d0; cursor: pointer; transition: width 0.3s, background 0.3s; }
.sc-dots button.is-active { width: 28px; background: var(--green); }
@media (prefers-reduced-motion: reduce) {
  .sc-slide, .sc-panel { transition: none; animation: none; }
}

/* AFaDa */
.afada { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.afada p { color: var(--muted); font-size: 17px; margin: 16px 0 18px; }
.afada-card { display: flex; flex-direction: column; gap: 8px; background: linear-gradient(135deg, var(--green), var(--green-dark)); color: #fff; border-radius: 24px; padding: 36px; box-shadow: 0 24px 48px -20px rgba(0, 90, 45, 0.5); transition: transform 0.2s; }
.afada-card:hover { transform: translateY(-3px); }
.afada-card b { font-size: 40px; font-weight: 800; }
.afada-card span { opacity: 0.9; font-size: 17px; }
.afada-card em { font-style: normal; font-weight: 700; margin-top: 12px; }

/* FAQ */
details { border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; margin-bottom: 12px; background: #fff; }
summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--green); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); margin: 12px 0 0; }

/* CTA */
.cta { background: linear-gradient(135deg, #00ab55, #00874a); color: #fff; text-align: center; }
.cta-inner { padding: 88px 0; }
.cta-icon { width: 84px; height: 84px; border-radius: 20px; margin: 0 auto 20px; box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2); }
.cta h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.cta p { opacity: 0.9; font-size: 18px; margin: 10px 0 28px; }
.contact { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 12px; margin-top: 32px; }
.contact a { border: 1px solid rgba(255, 255, 255, 0.5); border-radius: 999px; padding: 8px 18px; font-weight: 600; }
.contact a:hover { background: rgba(255, 255, 255, 0.12); }

/* Footer */
.footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 24px 0; }
.footer a:hover { color: var(--green); }

/* Responsive */
@media (max-width: 960px) {
  .hero-inner, .feature, .afada { grid-template-columns: 1fr; }
  .hero-inner { padding: 48px 0 56px; }
  .hero-phones { height: 520px; }
  .hero-phones .phone { width: 230px; }
  .phone-front { right: 50%; transform: translateX(80%); }
  .phone-back { right: 50%; transform: translateX(-10%) rotate(-6deg); }
  .feature { gap: 36px; }
  .feature.reverse .feature-text { order: 0; }
  .steps { grid-template-columns: 1fr; }
  .strip-inner { grid-template-columns: 1fr; gap: 14px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-inner .btn { margin-left: auto; }
  .brand span { font-size: 15px; }
  .section { padding: 64px 0; }
  .hero-phones { height: 440px; }
  .hero-phones .phone { width: 180px; border-radius: 30px; padding: 7px; }
  .phone-front { right: auto; left: calc(50% - 20px); transform: none; }
  .phone-back { right: auto; left: calc(50% - 155px); transform: rotate(-6deg); }
  .hero-phones .phone img { border-radius: 24px; }
  .feature-media .phone { width: 230px; }
  .sc-slide { width: 220px; }
  .sc-track { gap: 18px; padding: 28px calc(50% - 110px) 36px; }
  .sc-nav { display: none; }
  .sc-viewport { -webkit-mask-image: none; mask-image: none; }
  .feature-media.duo { padding-right: 70px; }
  .feature-media.duo .phone.small { width: 150px; }
  .store { min-width: 0; flex: 1 1 150px; }
  /* Liên hệ: nhãn 1 dòng, 2 nút chia đều bên dưới */
  .contact { gap: 10px; }
  .contact > span { flex-basis: 100%; }
  .contact a { flex: 1 1 200px; text-align: center; white-space: nowrap; padding: 11px 14px; }
  /* Footer: căn giữa, bản quyền 1 khối, link xếp hàng đều */
  .footer-inner { flex-direction: column; align-items: center; text-align: center; gap: 12px; padding: 28px 0; }
  .footer .footer-links { justify-content: center; gap: 10px 18px; }
}

/* Legal pages */
.legal-hero { background: linear-gradient(135deg, #00ab55, #00874a); color: #fff; text-align: center; padding: 56px 0 88px; }
.legal-hero a { opacity: 0.9; font-size: 15px; }
.legal-hero a:hover { opacity: 1; }
.legal-hero h1 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; margin: 14px 0 8px; }
.legal-hero p { margin: 0; opacity: 0.9; }
.legal { background: #fff; border-radius: 20px; margin: -56px auto 72px; padding: 40px clamp(20px, 5vw, 56px); box-shadow: 0 20px 50px -24px rgba(0, 60, 30, 0.25); border: 1px solid var(--line); }
.legal h2 { font-size: 22px; font-weight: 800; color: var(--green-dark); margin: 36px 0 12px; }
.legal h2:first-child { margin-top: 0; }
.legal h3 { font-size: 17px; margin: 22px 0 8px; }
.legal p, .legal li { color: #34443d; font-size: 16px; }
.legal ul, .legal ol { padding-left: 22px; }
.legal li { margin-bottom: 6px; }
.legal .note { background: var(--green-bg); border-radius: 12px; padding: 14px 18px; }
.legal .company { border-left: 3px solid var(--green); padding-left: 16px; }
.legal .effective { margin-top: 36px; font-style: italic; color: var(--muted); }
.legal a { color: var(--green); font-weight: 600; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }