:root {
  --red: #e8192c;
  --black: #080809;
  --panel: #111113;
  --panel-2: #18181b;
  --text: #f7f7f8;
  --muted: rgba(247, 247, 248, 0.68);
  --soft: rgba(247, 247, 248, 0.12);
  --line: rgba(247, 247, 248, 0.11);
  --amber: #ffb020;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--black);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
a { color: inherit; }
img { max-width: 100%; height: auto; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.eyebrow {
  color: var(--red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}
.section {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}
.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}
.section-head.center {
  margin-inline: auto;
  text-align: center;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 880px;
  margin-bottom: 22px;
  font-size: clamp(38px, 7vw, 76px);
  line-height: 0.98;
  font-weight: 860;
  letter-spacing: 0;
}
h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.08;
  font-weight: 820;
  letter-spacing: 0;
}
h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.2;
  font-weight: 780;
  letter-spacing: 0;
}
.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}
.muted { color: var(--muted); }

/* Theme-like navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 16px 60px;
  background: rgba(8, 8, 9, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  transition: padding 0.25s ease, min-height 0.25s ease;
}
nav.scrolled {
  min-height: 62px;
  padding-top: 10px;
  padding-bottom: 10px;
}
.logo {
  display: inline-flex !important;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-hex {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--red);
  color: white;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  font-size: 13px;
  font-weight: 850;
}
.logo-name {
  color: var(--text);
  font-size: 17px;
  font-weight: 820;
}
.logo-name span { color: var(--red); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-links > li > a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
  white-space: nowrap;
  transition: color 0.2s ease;
}
.nav-links > li > a:hover { color: var(--text); }
.drop { position: relative; }
.drop:hover .drop-panel {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}
.drop-panel {
  position: absolute;
  top: 100%;
  left: -18px;
  min-width: 312px;
  padding-top: 14px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: all 0.2s ease;
}
.drop-inner {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.45);
}
.drop-inner a {
  display: flex !important;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}
.drop-inner a:hover {
  background: rgba(247, 247, 248, 0.06);
  color: var(--text);
}
.drop-inner strong {
  display: block;
  color: var(--text);
  font-size: 13px;
}
.drop-inner span:not(.di) {
  color: var(--muted);
  font-size: 11px;
}
.di {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(232, 25, 44, 0.13);
  color: var(--red);
  font-size: 10px;
  font-weight: 850;
  flex-shrink: 0;
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn-ghost,
.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 750;
  white-space: nowrap;
}
.btn-ghost {
  border: 1px solid var(--line);
  color: var(--muted);
}
.btn-cta {
  background: var(--red);
  color: white;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 38px;
  height: 38px;
  padding: 11px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Main content */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 13px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 780;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:hover {
  transform: translateY(-2px);
  border-color: rgba(232, 25, 44, 0.55);
}
.btn.primary {
  background: var(--text);
  color: var(--black);
  border-color: var(--text);
}
.btn.red {
  background: var(--red);
  color: white;
  border-color: var(--red);
}
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 150px 0 64px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(8, 8, 9, 0.97) 0%, rgba(8, 8, 9, 0.84) 48%, rgba(8, 8, 9, 0.3) 100%),
    url("../images/hero-vietnamese-social-media-team.png") center / cover;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 30%;
  background: linear-gradient(180deg, transparent, var(--black));
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero .eyebrow { margin-bottom: 16px; }
.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 850px;
  margin-top: 46px;
  border: 1px solid var(--line);
  background: var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.proof-item {
  min-height: 108px;
  padding: 18px;
  background: rgba(17, 17, 19, 0.86);
}
.proof-number {
  display: block;
  margin-bottom: 5px;
  color: white;
  font-size: 24px;
  font-weight: 850;
}
.proof-item span:last-child {
  color: var(--muted);
  font-size: 13px;
}
.answer-band {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.answer-grid {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 36px;
  align-items: start;
}
.answer-copy {
  color: rgba(247, 247, 248, 0.82);
  font-size: 17px;
}
.answer-copy p:last-child { margin-bottom: 0; }
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.service-card,
.price-card,
.ads-card,
.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}
.service-card {
  min-height: 220px;
  padding: 22px;
}
.service-card .num {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: 22px;
  border-radius: 8px;
  background: rgba(232, 25, 44, 0.14);
  color: var(--red);
  font-size: 13px;
  font-weight: 850;
}
.service-card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 0;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 560px;
  padding: 28px;
}
.price-card.featured {
  border-color: rgba(232, 25, 44, 0.72);
  background: linear-gradient(180deg, rgba(232, 25, 44, 0.12), var(--panel) 42%);
}
.badge {
  align-self: flex-start;
  margin-bottom: 18px;
  padding: 5px 10px;
  border-radius: 8px;
  background: var(--red);
  color: white;
  font-size: 12px;
  font-weight: 800;
}
.price {
  margin-bottom: 20px;
  color: white;
  font-size: 36px;
  font-weight: 850;
  line-height: 1;
}
.price small {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}
.price-card ul {
  flex: 1;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}
.price-card li {
  padding: 11px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
.price-card li strong { color: white; }
.process {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.process-step {
  min-height: 190px;
  padding: 22px;
  background: var(--panel);
}
.process-step b {
  display: block;
  margin-bottom: 12px;
  color: var(--red);
  font-size: 13px;
}
.process-step p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 0;
}
.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.video-wrapper {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
}
.video-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.video-wrapper.wide {
  grid-column: 1 / -1;
  width: min(620px, 100%);
  margin: 0 auto;
}
.ads-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.ads-card { padding: 28px; }
.highlight {
  margin-top: 18px;
  color: var(--red);
  font-size: 18px;
  font-weight: 850;
}
.note {
  color: var(--amber);
  font-size: 13px;
}
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.faq-item { padding: 24px; }
.faq-item p {
  color: var(--muted);
  margin-bottom: 0;
}
.cta {
  padding: 66px 0;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #151517 0%, #080809 100%);
  color: var(--text);
}
.cta-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}
.cta h2 { color: var(--text); }
.cta p {
  color: rgba(247, 247, 248, 0.72);
  margin-bottom: 0;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}
.cta .btn.primary {
  background: var(--text);
  color: var(--black);
  border-color: var(--text);
}
.cta .btn {
  color: var(--text);
  border-color: rgba(247, 247, 248, 0.22);
}

/* Footer */
.site-footer {
  padding: 70px 60px 36px;
  border-top: 1px solid var(--line);
  background: var(--black);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 60px;
  max-width: var(--max);
  margin: 0 auto 56px;
}
.footer-logo { margin-bottom: 16px; }
.footer-brand-desc {
  max-width: 430px;
  margin: 16px 0 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}
.footer-contact a,
.footer-col a,
.footer-legal a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-contact a:hover,
.footer-col a:hover,
.footer-legal a:hover { color: var(--text); }
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col-title {
  margin-bottom: 10px;
  color: var(--text);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  color: rgba(247, 247, 248, 0.48);
  font-size: 13px;
}

@media (max-width: 1120px) {
  nav { padding-inline: 28px; }
  .nav-links { gap: 16px; }
  .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pricing-grid,
  .process { grid-template-columns: 1fr; }
  .price-card,
  .process-step { min-height: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1024px) {
  .menu-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 86vw);
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
    padding: 96px 28px 40px;
    background: rgba(8, 8, 9, 0.98);
    border-left: 1px solid var(--line);
    box-shadow: -12px 0 36px rgba(0, 0, 0, 0.45);
    transition: right 0.3s ease;
  }
  .nav-links.active { right: 0; }
  .drop-panel {
    position: static;
    min-width: 100%;
    padding-top: 12px;
    opacity: 1;
    pointer-events: all;
    transform: none;
    display: none;
  }
  .drop.active .drop-panel { display: block; }
  .drop-inner {
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, var(--max)); }
  .section { padding: 58px 0; }
  nav {
    min-height: 64px;
    padding: 12px 14px;
  }
  .nav-cta .btn-ghost { display: none; }
  .btn-cta { display: none; }
  .logo-name { font-size: 16px; }
  .hero {
    min-height: auto;
    padding: 104px 0 42px;
    background:
      linear-gradient(180deg, rgba(8, 8, 9, 0.82), rgba(8, 8, 9, 0.98)),
      url("../images/hero-vietnamese-social-media-team.png") center / cover;
  }
  h1 { font-size: clamp(36px, 12vw, 54px); }
  .proof-strip,
  .answer-grid,
  .service-grid,
  .video-grid,
  .ads-grid,
  .faq-grid,
  .cta-inner,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid { gap: 34px; }
  .cta-actions,
  .footer-bottom {
    align-items: flex-start;
    justify-content: flex-start;
  }
  .cta-actions,
  .footer-bottom { flex-direction: column; }
  .btn { width: 100%; }
  .site-footer { padding: 54px 18px 28px; }
}