:root {
  --blue-50: #eef2fa;
  --blue-100: #dde6f5;
  --blue-200: #b3c6ea;
  --blue-300: #82a2dc;
  --blue-400: #547fcb;
  --blue-500: #3560b8;
  --blue-600: #24478f;
  --blue-700: #1a3570;
  --blue-800: #12274f;
  --blue-900: #0a1730;
  --teal: #3560b8;
  --teal-dark: #1a3570;
  --teal-light: #82a2dc;
  --accent: #3560b8;
  --accent-dark: #1a3570;
  --bestseller: #24478f;
  --bestseller-dark: #12274f;
  --zalo: #0068ff;
  --messenger: #0084ff;
  --facebook: #1877f2;
  --ink: #0f172a;
  --ink-soft: #475569;
  --white: #ffffff;
  --radius: 20px;
  --radius-lg: 32px;
  --shadow: 0 10px 30px -12px rgba(26, 53, 112, 0.22);
  --shadow-lg: 0 20px 45px -15px rgba(26, 53, 112, 0.32);
  --container: 1100px;
  --font: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-script: 'Alex Brush', cursive;
  --font-serif: 'Playfair Display', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--ink); line-height: 1.6; background: var(--white); overflow-x: hidden; }
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; position: relative; }

.skip-link { position: absolute; left: -9999px; top: 0; background: var(--blue-600); color: #fff; padding: 12px 20px; z-index: 999; border-radius: 0 0 8px 0; }
.skip-link:focus { left: 0; }

h1, h2, h3 { font-weight: 800; line-height: 1.25; color: var(--ink); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.1rem; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--blue-100); color: var(--blue-700);
  padding: 7px 16px; border-radius: 999px;
  font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; font-size: 0.72rem;
  margin-bottom: 14px;
}
.eyebrow--light { background: var(--blue-50); color: var(--blue-600); }
.eyebrow--teal { background: var(--blue-200); color: var(--blue-800); }

.section { padding: 72px 0; position: relative; }
.section--alt { background: var(--blue-50); }
.section__heading { max-width: 620px; margin: 0 auto 40px; text-align: center; }
.section__desc { color: var(--ink-soft); margin-top: 12px; }

/* Wave dividers between sections */
.section-wave { position: absolute; left: 0; bottom: -1px; width: 100%; height: 50px; display: block; z-index: 1; }

/* Floating droplet decorations */
.droplet { position: absolute; opacity: 0.16; color: var(--blue-400); animation: float-drop 7s ease-in-out infinite; pointer-events: none; z-index: 0; }
.droplet svg { width: 100%; height: 100%; fill: currentColor; }
@keyframes float-drop {
  0%, 100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-18px) rotate(4deg); }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 26px; border-radius: 999px; font-weight: 700; font-size: 0.95rem; border: none; cursor: pointer; transition: transform 0.2s ease, box-shadow 0.2s ease; white-space: nowrap; }
.btn--zalo { background: var(--zalo); color: #fff; }
.btn--zalo:hover { transform: translateY(-2px); box-shadow: 0 10px 20px -8px rgba(0,104,255,0.5); }
.btn--messenger { background: var(--messenger); color: #fff; }
.btn--messenger:hover { transform: translateY(-2px); box-shadow: 0 10px 20px -8px rgba(0,132,255,0.5); }
.btn--lg { padding: 16px 32px; font-size: 1rem; }
.btn--cta { background: linear-gradient(120deg, var(--accent), var(--accent-dark)); color: #fff; animation: pulse-glow 2.4s ease-in-out 3; }
.btn--cta:hover { transform: translateY(-2px); box-shadow: 0 12px 24px -8px rgba(26,53,112,0.5); animation: none; }
.btn--cta:disabled { opacity: 0.7; cursor: not-allowed; transform: none; animation: none; }
.btn--block { width: 100%; }
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(26,53,112,0.35); }
  50% { box-shadow: 0 0 0 10px rgba(26,53,112,0); }
}

/* Header */
.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(10px); border-radius: 0 0 22px 22px; box-shadow: 0 8px 24px -18px rgba(26,53,112,0.35); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; }
.logo__text { display: flex; flex-direction: column; line-height: 1.1; }
.logo__brand { font-family: var(--font-script); font-size: 1.9rem; font-weight: 400; color: var(--blue-700); }
.logo__sub { font-size: 0.68rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-soft); }
.hero__wordmark { font-size: 1.15em; color: var(--blue-600) !important; }
.header__actions { display: flex; align-items: center; gap: 12px; }
.hotline { display: flex; align-items: center; gap: 6px; font-weight: 700; color: var(--blue-700); font-size: 0.9rem; }

/* Hero */
.hero { padding: 52px 0 68px; text-align: center; background: linear-gradient(160deg, var(--blue-50), #fff); position: relative; overflow: hidden; }
.hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); max-width: 780px; margin: 0 auto; }
.hero__desc { color: var(--ink-soft); max-width: 620px; margin: 18px auto 32px; font-size: 1.05rem; }
.hero__image { margin: 0 auto 32px; max-width: 820px; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); position: relative; z-index: 1; }
.hero__image img { width: 100%; height: auto; display: block; }
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; position: relative; z-index: 1; }
.hero__badges { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; margin-top: 28px; position: relative; z-index: 1; }
.hero__badges li { color: var(--ink-soft); font-size: 0.85rem; font-weight: 600; }

/* About text */
.about-text { max-width: 760px; }
.checklist { margin: 20px 0; display: flex; flex-direction: column; gap: 14px; }
.checklist li { padding-left: 30px; position: relative; color: var(--ink-soft); }
.checklist li::before {
  content: ""; position: absolute; left: 2px; top: 5px; width: 14px; height: 14px;
  background: linear-gradient(135deg, var(--blue-400), var(--blue-600));
  border-radius: 50% 50% 50% 0; transform: rotate(-45deg);
}

/* Journey / brand story (editorial, Suntory-inspired) */
.journey { background: linear-gradient(180deg, #fff 0%, var(--blue-50) 100%); }
.journey__intro { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.journey__title { font-family: var(--font-serif); font-weight: 700; font-style: italic; font-size: clamp(1.6rem, 3.2vw, 2.3rem); margin: 4px 0 18px; color: var(--blue-800); line-height: 1.35; }
.journey__desc { color: var(--ink-soft); font-size: 1.03rem; line-height: 1.85; }

.journey__steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; }
.journey__steps::before { content: ""; position: absolute; top: 38px; left: 12%; right: 12%; height: 1px; background: linear-gradient(90deg, transparent, var(--blue-200) 20%, var(--blue-200) 80%, transparent); z-index: 0; }
.journey__step { position: relative; text-align: center; z-index: 1; }
.journey__num { display: block; font-family: var(--font-serif); font-style: italic; font-size: 0.85rem; color: var(--blue-300); margin-bottom: 10px; }
.journey__icon { width: 76px; height: 76px; margin: 0 auto 20px; border-radius: 50%; background: #fff; border: 1.5px solid var(--blue-100); display: flex; align-items: center; justify-content: center; color: var(--blue-600); box-shadow: var(--shadow); }
.journey__icon--teal { color: var(--teal); }
.journey__step h3 { font-size: 1.05rem; margin-bottom: 8px; color: var(--blue-800); }
.journey__step p { color: var(--ink-soft); font-size: 0.88rem; line-height: 1.65; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { position: relative; background: #fff; border-radius: var(--radius); padding: 30px 26px; box-shadow: var(--shadow); overflow: hidden; transition: transform 0.25s ease, box-shadow 0.25s ease; }
.feature-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--blue-400), var(--blue-600)); transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:has(.feature-card__icon--teal)::before { background: linear-gradient(90deg, var(--teal), var(--teal-dark)); }
.feature-card__icon { width: 52px; height: 52px; background: linear-gradient(135deg, var(--blue-400), var(--blue-600)); color: #fff; border-radius: 16px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.feature-card__icon--ph { font-size: 0.8rem; font-weight: 800; line-height: 1.05; text-align: center; }
.feature-card__icon--teal { background: linear-gradient(135deg, var(--teal), var(--teal-dark)); }
.feature-card h3 { margin-bottom: 6px; }
.feature-card p { color: var(--ink-soft); font-size: 0.92rem; }

/* Products (bậc thang) */
.products { display: flex; align-items: flex-end; justify-content: center; gap: clamp(14px, 3vw, 40px); flex-wrap: wrap; margin: 0 auto 8px; position: relative; z-index: 1; }
.product-card { position: relative; text-align: center; width: 208px; padding: 24px 14px 22px; border-radius: 28px; background: #fff; box-shadow: var(--shadow); transition: transform 0.25s ease, box-shadow 0.25s ease; }
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.product-card__figure { display: flex; align-items: flex-end; justify-content: center; margin-bottom: 18px; position: relative; }
.product-card__figure::after { content: ""; position: absolute; bottom: -6px; left: 50%; transform: translateX(-50%); width: 70%; height: 18px; background: radial-gradient(ellipse, rgba(26,53,112,0.22), transparent 70%); border-radius: 50%; }
.product-card__figure img { width: auto; object-fit: contain; filter: drop-shadow(0 12px 14px rgba(26,53,112,0.18)); transition: transform 0.25s ease; }
.product-card:hover .product-card__figure img { transform: scale(1.04) translateY(-4px); }
.product-card--sm .product-card__figure { height: 180px; }
.product-card--sm .product-card__figure img { height: 160px; }
.product-card--md .product-card__figure { height: 240px; }
.product-card--md .product-card__figure img { height: 220px; }
.product-card--lg .product-card__figure { height: 320px; }
.product-card--lg .product-card__figure img { height: 300px; }
.product-card h3 { color: var(--blue-700); font-size: 1.3rem; margin-bottom: 4px; }
.product-card__tagline { color: var(--ink-soft); font-size: 0.85rem; min-height: 40px; }
.product-card__price { font-weight: 700; font-style: italic; color: var(--blue-600); font-size: 0.9rem; margin: 10px 0 16px; }
.product-card__badge { position: absolute; top: -16px; left: 50%; transform: translateX(-50%); background: linear-gradient(120deg, var(--bestseller), var(--bestseller-dark)); color: #fff; font-size: 0.92rem; font-weight: 800; padding: 7px 18px; border-radius: 999px; box-shadow: 0 8px 16px -6px rgba(18,39,79,0.45); white-space: nowrap; z-index: 2; }
.product-card--md { background: linear-gradient(180deg, #fff, #eef4fd); }
.product-card--md .product-card__figure::after { background: radial-gradient(ellipse, rgba(26,53,112,0.2), transparent 70%); }
.product-card--md .product-card__price { color: var(--bestseller-dark); }

.cert-badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 28px; position: relative; z-index: 1; }
.cert-badges span { padding: 9px 18px; border: 1.5px solid var(--blue-200); border-radius: 999px; font-weight: 700; font-size: 0.82rem; color: var(--blue-700); background: var(--blue-50); }

/* Lead capture section — bright & fresh */
.section--lead {
  position: relative;
  padding: 84px 0;
  background: linear-gradient(160deg, #eaf6ff 0%, #ffffff 55%, var(--blue-50) 100%);
  overflow: hidden;
}
.section--lead::before, .section--lead::after {
  content: ""; position: absolute; border-radius: 50%; pointer-events: none;
}
.section--lead::before { width: 420px; height: 420px; top: -180px; left: -140px; background: radial-gradient(circle, rgba(59,111,224,0.12), transparent 70%); }
.section--lead::after { width: 320px; height: 320px; bottom: -160px; right: -100px; background: radial-gradient(circle, rgba(53,96,184,0.14), transparent 70%); }
.lead { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: start; z-index: 1; }
.lead__info h2 { color: var(--ink); margin-bottom: 14px; font-size: clamp(1.5rem, 2.6vw, 2rem); }
.lead__desc { color: var(--ink-soft); max-width: 480px; margin-bottom: 22px; }
.lead__perks { display: flex; flex-direction: column; gap: 14px; margin-bottom: 28px; }
.lead__perks li { color: var(--ink); font-weight: 600; font-size: 0.95rem; padding-left: 32px; position: relative; }
.lead__perks li::before {
  content: ""; position: absolute; left: 2px; top: 4px; width: 16px; height: 16px;
  background: linear-gradient(135deg, var(--blue-400), var(--teal));
  border-radius: 50% 50% 50% 0; transform: rotate(-45deg);
}
.lead__alt { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.lead__alt span { color: var(--ink-soft); font-size: 0.85rem; font-weight: 600; }

.lead__form { background: #fff; border-radius: var(--radius-lg); padding: 34px; box-shadow: var(--shadow-lg); }
.lead__form h3 { color: var(--blue-700); margin-bottom: 18px; font-size: 1.15rem; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.form-group input, .form-group select {
  width: 100%; padding: 14px 16px; border: 1.5px solid var(--blue-200); border-radius: 14px;
  font-family: var(--font); font-size: 0.95rem; color: var(--ink); background: var(--blue-50);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(59,111,224,0.15); background: #fff; }
.lead__note { color: var(--ink-soft); font-size: 0.76rem; margin-top: 12px; text-align: center; }
.lead__success { margin-top: 12px; text-align: center; color: #1a7f37; font-weight: 700; font-size: 0.9rem; background: #e8f8ee; padding: 10px; border-radius: 12px; }

/* FAQ */
.faq { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; position: relative; z-index: 1; }
.faq-item { background: #fff; border-radius: 18px; padding: 18px 22px; box-shadow: var(--shadow); }
.faq-item summary { font-weight: 700; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--blue-600); font-weight: 400; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { color: var(--ink-soft); margin-top: 12px; font-size: 0.92rem; }

/* Footer */
.footer { background: var(--blue-900); color: var(--blue-100); padding: 48px 0; text-align: center; border-radius: 32px 32px 0 0; }
.footer__inner { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.footer a { color: var(--blue-200); font-weight: 600; }
.footer a:hover { color: #fff; }
.footer__legal { font-size: 0.8rem; color: var(--blue-300); margin-top: 12px; }

/* Floating Zalo/Messenger/Facebook buttons */
.fab-group { position: fixed; bottom: 22px; right: 22px; display: flex; flex-direction: column; gap: 14px; z-index: 90; }
.fab { width: 68px; height: 68px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 0.9rem; box-shadow: var(--shadow-lg); transition: transform 0.2s; }
.fab:hover { transform: scale(1.08); }
.fab--zalo { background: var(--zalo); animation: fab-blink-zalo 2s ease-out infinite; }
.fab--messenger { background: var(--messenger); animation: fab-blink-messenger 2s ease-out infinite; animation-delay: 0.7s; }
.fab--messenger svg { width: 32px; height: 32px; }
.fab--facebook { background: var(--facebook); animation: fab-blink-facebook 2s ease-out infinite; animation-delay: 1.4s; }
.fab--facebook svg { width: 30px; height: 30px; }
@keyframes fab-blink-zalo {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 0 0 rgba(0,104,255,0.55); }
  70% { box-shadow: var(--shadow-lg), 0 0 0 16px rgba(0,104,255,0); }
}
@keyframes fab-blink-messenger {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 0 0 rgba(0,132,255,0.55); }
  70% { box-shadow: var(--shadow-lg), 0 0 0 16px rgba(0,132,255,0); }
}
@keyframes fab-blink-facebook {
  0%, 100% { box-shadow: var(--shadow-lg), 0 0 0 0 rgba(24,119,242,0.55); }
  70% { box-shadow: var(--shadow-lg), 0 0 0 16px rgba(24,119,242,0); }
}

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Responsive — mobile first priority */
@media (max-width: 768px) {
  .header { border-radius: 0 0 18px 18px; }
  .header__actions .hotline { display: none; }
  .features { grid-template-columns: 1fr; }
  .logo__sub { display: none; }
  .section { padding: 56px 0; }
  .hero { padding: 40px 0 52px; }
  .hero__image { border-radius: 22px; }
  .products { flex-direction: column; align-items: center; gap: 28px; }
  .product-card { width: 100%; max-width: 280px; }
  .product-card--sm .product-card__figure,
  .product-card--md .product-card__figure,
  .product-card--lg .product-card__figure { height: 220px; }
  .product-card--sm .product-card__figure img,
  .product-card--md .product-card__figure img,
  .product-card--lg .product-card__figure img { height: 200px; }
  .lead { grid-template-columns: 1fr; gap: 32px; }
  .lead__form { padding: 26px 22px; border-radius: 24px; }
  .section-wave { height: 32px; }
  .droplet--3 { display: none; }
  .journey__steps { grid-template-columns: 1fr; gap: 36px; }
  .journey__steps::before { display: none; }
}

@media (max-width: 480px) {
  .header__actions .btn { padding: 10px 16px; font-size: 0.85rem; }
  .eyebrow { font-size: 0.68rem; padding: 6px 13px; }
  .footer { border-radius: 24px 24px 0 0; }
}

@media (prefers-reduced-motion: reduce) {
  .droplet, .btn--cta, .fab--zalo, .fab--messenger, .fab--facebook { animation: none; }
  .reveal { transition: none; }
}