body.ds-landing .ds-container {
  width: 100%;
  max-width: var(--ds-container-max);
  margin-inline: auto;
  padding-inline: var(--ds-space-6);
}

@media (min-width: 1024px) {
  body.ds-landing .ds-container {
    padding-inline: var(--ds-space-8);
  }
}

body.ds-landing .ds-section {
  padding-block: var(--ds-space-16);
}

@media (min-width: 768px) {
  body.ds-landing .ds-section { padding-block: var(--ds-space-20); }
}

@media (min-width: 1024px) {
  body.ds-landing .ds-section { padding-block: var(--ds-space-24); }
}

body.ds-landing .ds-section--tight { padding-block: var(--ds-space-12); }
body.ds-landing .ds-section--alt   { background: var(--ds-surface-alt); }
body.ds-landing .ds-section--dark  { background: var(--slate-900); color: #fff; }
body.ds-landing .ds-section--dark p { color: var(--slate-300); }

body.ds-landing .ds-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-2);
  padding: var(--ds-space-2) var(--ds-space-3);
  font-size: var(--ds-fs-xs);
  font-weight: var(--ds-fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: var(--ds-radius-full);
}

body.ds-landing .ds-section-heading {
  max-width: 48rem;
  margin-inline: auto;
  text-align: center;
}

body.ds-landing .ds-section-heading h2 {
  margin-top: var(--ds-space-4);
}

body.ds-landing .ds-section-heading p {
  margin-top: var(--ds-space-4);
  font-size: var(--ds-fs-lg);
}

body.ds-landing .ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ds-space-2);
  padding: var(--ds-space-3) var(--ds-space-5);
  font-family: inherit;
  font-size: var(--ds-fs-sm);
  font-weight: var(--ds-fw-semibold);
  line-height: 1;
  color: #fff;
  background: var(--ds-primary);
  border: 1px solid var(--ds-primary);
  border-radius: var(--ds-radius-md);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition:
    transform var(--ds-dur-fast) var(--ds-ease),
    background var(--ds-dur-fast) var(--ds-ease),
    box-shadow var(--ds-dur-base) var(--ds-ease),
    border-color var(--ds-dur-fast) var(--ds-ease);
}

body.ds-landing .ds-btn:hover {
  background: var(--ds-primary-hover);
  border-color: var(--ds-primary-hover);
  color: #fff;
  box-shadow: var(--ds-shadow-glow);
  transform: translateY(-1px);
}

body.ds-landing .ds-btn:active { transform: translateY(0); }

body.ds-landing .ds-btn--lg {
  padding: var(--ds-space-4) var(--ds-space-6);
  font-size: var(--ds-fs-base);
  border-radius: var(--ds-radius-lg);
}

body.ds-landing .ds-btn--sm {
  padding: var(--ds-space-2) var(--ds-space-3);
  font-size: var(--ds-fs-xs);
  border-radius: var(--ds-radius-sm);
}

body.ds-landing .ds-btn--secondary {
  color: var(--ds-text);
  background: #fff;
  border-color: var(--ds-border-strong);
}

body.ds-landing .ds-btn--secondary:hover {
  color: var(--ds-text);
  background: var(--slate-50);
  border-color: var(--slate-400);
  box-shadow: var(--ds-shadow-md);
}

body.ds-landing .ds-btn--ghost {
  color: var(--ds-text);
  background: transparent;
  border-color: transparent;
}

body.ds-landing .ds-btn--ghost:hover {
  color: var(--ds-primary);
  background: var(--brand-50);
  border-color: transparent;
  box-shadow: none;
}

body.ds-landing .ds-btn--on-dark {
  color: var(--ds-text);
  background: #fff;
  border-color: #fff;
}

body.ds-landing .ds-btn--on-dark:hover {
  background: var(--slate-100);
  border-color: var(--slate-100);
  box-shadow: 0 8px 32px rgba(255, 255, 255, 0.18);
}

body.ds-landing .ds-btn i[data-lucide] {
  width: 1.1em;
  height: 1.1em;
  stroke-width: 2.25;
}

body.ds-landing .ds-card {
  position: relative;
  padding: var(--ds-space-6);
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  box-shadow: var(--ds-shadow-sm);
  transition:
    transform var(--ds-dur-base) var(--ds-ease),
    box-shadow var(--ds-dur-base) var(--ds-ease),
    border-color var(--ds-dur-base) var(--ds-ease);
}

body.ds-landing .ds-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ds-shadow-lg);
  border-color: var(--ds-border-strong);
}

body.ds-landing .ds-card--flat { box-shadow: none; }
body.ds-landing .ds-card--flat:hover { box-shadow: var(--ds-shadow-md); transform: none; }

body.ds-landing .ds-card--feature { padding: var(--ds-space-8); }

body.ds-landing .ds-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: var(--ds-space-5);
  color: var(--ds-primary);
  background: var(--brand-50);
  border-radius: var(--ds-radius-md);
}

body.ds-landing .ds-card__icon i[data-lucide] {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

body.ds-landing .ds-card__title {
  margin-bottom: var(--ds-space-2);
  font-size: var(--ds-fs-lg);
  font-weight: var(--ds-fw-semibold);
  color: var(--ds-text);
}

body.ds-landing .ds-card__body {
  font-size: var(--ds-fs-sm);
  color: var(--ds-text-muted);
  line-height: var(--ds-lh-relaxed);
}

body.ds-landing .ds-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-1);
  padding: var(--ds-space-1) var(--ds-space-3);
  font-size: var(--ds-fs-xs);
  font-weight: var(--ds-fw-semibold);
  line-height: 1;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  border-radius: var(--ds-radius-full);
}

body.ds-landing .ds-badge--success { color: #047857; background: #ECFDF5; border-color: #A7F3D0; }
body.ds-landing .ds-badge--warning { color: #B45309; background: #FFFBEB; border-color: #FDE68A; }
body.ds-landing .ds-badge--danger  { color: #B91C1C; background: #FEF2F2; border-color: #FECACA; }
body.ds-landing .ds-badge--neutral { color: var(--slate-700); background: var(--slate-100); border-color: var(--slate-200); }

body.ds-landing .ds-grid {
  display: grid;
  gap: var(--ds-space-6);
}

body.ds-landing .ds-grid--features {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  body.ds-landing .ds-grid--features { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  body.ds-landing .ds-grid--features { grid-template-columns: repeat(3, 1fr); gap: var(--ds-space-8); }
}

body.ds-landing .ds-grid--stats {
  grid-template-columns: repeat(2, 1fr);
  gap: var(--ds-space-6);
}

@media (min-width: 1024px) {
  body.ds-landing .ds-grid--stats { grid-template-columns: repeat(4, 1fr); }
}

body.ds-landing .ds-stat__value {
  font-size: clamp(2rem, 3vw + 1rem, var(--ds-fs-5xl));
  font-weight: var(--ds-fw-bold);
  line-height: var(--ds-lh-tight);
  color: var(--ds-primary);
  letter-spacing: -0.03em;
}

body.ds-landing .ds-stat__label {
  margin-top: var(--ds-space-2);
  font-size: var(--ds-fs-sm);
  color: var(--ds-text-muted);
}

body.ds-landing .ds-divider {
  height: 1px;
  background: var(--ds-border);
  border: 0;
}

body.ds-landing .ds-navbar {
  position: sticky;
  top: 0;
  z-index: var(--ds-z-nav);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--ds-dur-base) var(--ds-ease),
    background var(--ds-dur-base) var(--ds-ease);
}

body.ds-landing .ds-navbar.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--ds-border);
}

body.ds-landing .ds-navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-6);
  height: 72px;
}

body.ds-landing .ds-navbar__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-2);
  font-size: var(--ds-fs-lg);
  font-weight: var(--ds-fw-bold);
  color: var(--ds-text);
  letter-spacing: -0.01em;
}

body.ds-landing .ds-navbar__brand i[data-lucide] {
  width: 28px;
  height: 28px;
  color: var(--ds-primary);
  stroke-width: 2.25;
}

body.ds-landing .ds-navbar__links {
  display: none;
  align-items: center;
  gap: var(--ds-space-8);
}

@media (min-width: 1024px) {
  body.ds-landing .ds-navbar__links { display: inline-flex; }
}

body.ds-landing .ds-navbar__links a {
  font-size: var(--ds-fs-sm);
  font-weight: var(--ds-fw-medium);
  color: var(--ds-text-muted);
}

body.ds-landing .ds-navbar__links a:hover { color: var(--ds-text); }

body.ds-landing .ds-navbar__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-3);
}

body.ds-landing .ds-navbar__login { display: none; }

@media (min-width: 1024px) {
  body.ds-landing .ds-navbar__login { display: inline-flex; }
}

body.ds-landing .ds-navbar__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--ds-text);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-md);
  background: #fff;
}

@media (min-width: 1024px) {
  body.ds-landing .ds-navbar__toggle { display: none; }
}

body.ds-landing .ds-mobile-menu {
  display: none;
  padding: var(--ds-space-4) var(--ds-space-6) var(--ds-space-6);
  background: #fff;
  border-bottom: 1px solid var(--ds-border);
}

body.ds-landing .ds-mobile-menu.is-open { display: block; }

body.ds-landing .ds-mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: var(--ds-space-2);
}

body.ds-landing .ds-mobile-menu a {
  display: block;
  padding: var(--ds-space-3) var(--ds-space-4);
  font-weight: var(--ds-fw-medium);
  color: var(--ds-text);
  border-radius: var(--ds-radius-md);
}

body.ds-landing .ds-mobile-menu a:hover {
  background: var(--brand-50);
  color: var(--ds-primary);
}

body.ds-landing .ds-footer {
  padding-block: var(--ds-space-16) var(--ds-space-10);
  background: var(--slate-900);
  color: var(--slate-300);
}

body.ds-landing .ds-footer h4 {
  margin-bottom: var(--ds-space-4);
  font-size: var(--ds-fs-sm);
  font-weight: var(--ds-fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
}

body.ds-landing .ds-footer a {
  display: inline-block;
  padding-block: var(--ds-space-1);
  font-size: var(--ds-fs-sm);
  color: var(--slate-400);
}

body.ds-landing .ds-footer a:hover { color: #fff; }

body.ds-landing .ds-footer__grid {
  display: grid;
  gap: var(--ds-space-10);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  body.ds-landing .ds-footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  body.ds-landing .ds-footer__grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}

body.ds-landing .ds-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--ds-space-4);
  align-items: flex-start;
  justify-content: space-between;
  margin-top: var(--ds-space-12);
  padding-top: var(--ds-space-6);
  border-top: 1px solid var(--slate-700);
  font-size: var(--ds-fs-xs);
  color: var(--slate-400);
}

@media (min-width: 768px) {
  body.ds-landing .ds-footer__bottom { flex-direction: row; align-items: center; }
}

body.ds-landing .ds-code {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-fs-sm);
  line-height: var(--ds-lh-relaxed);
  color: var(--slate-100);
  background: var(--slate-900);
  border: 1px solid var(--slate-800);
  border-radius: var(--ds-radius-lg);
  padding: var(--ds-space-6);
  overflow-x: auto;
}

body.ds-landing .ds-code .tok-c { color: #94A3B8; }
body.ds-landing .ds-code .tok-k { color: #60A5FA; }
body.ds-landing .ds-code .tok-s { color: #86EFAC; }
body.ds-landing .ds-code .tok-n { color: #FDBA74; }

body.ds-landing .ds-faq {
  border-top: 1px solid var(--ds-border);
}

body.ds-landing .ds-faq__item {
  border-bottom: 1px solid var(--ds-border);
}

body.ds-landing .ds-faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-4);
  padding-block: var(--ds-space-5);
  font-size: var(--ds-fs-lg);
  font-weight: var(--ds-fw-semibold);
  color: var(--ds-text);
  cursor: pointer;
  list-style: none;
}

body.ds-landing .ds-faq__item summary::-webkit-details-marker { display: none; }

body.ds-landing .ds-faq__item summary::after {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") center / contain no-repeat;
  transition: transform var(--ds-dur-base) var(--ds-ease);
}

body.ds-landing .ds-faq__item[open] summary::after { transform: rotate(180deg); }

body.ds-landing .ds-faq__item[open] summary { color: var(--ds-primary); }

body.ds-landing .ds-faq__body {
  padding-bottom: var(--ds-space-5);
  padding-right: var(--ds-space-8);
  font-size: var(--ds-fs-base);
  color: var(--ds-text-muted);
  line-height: var(--ds-lh-relaxed);
}

body.ds-landing .ds-cta-banner {
  padding: var(--ds-space-12) var(--ds-space-8);
  background: linear-gradient(135deg, var(--brand-600) 0%, var(--brand-800) 100%);
  border-radius: var(--ds-radius-2xl);
  color: #fff;
  text-align: center;
  box-shadow: var(--ds-shadow-xl);
}

body.ds-landing .ds-cta-banner h2 { color: #fff; }
body.ds-landing .ds-cta-banner p { color: rgba(255, 255, 255, 0.85); max-width: 40rem; margin-inline: auto; margin-top: var(--ds-space-4); }

body.ds-landing .ds-cta-banner__actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--ds-space-3);
  justify-content: center;
  margin-top: var(--ds-space-8);
}

/* ===== Mobile chuẩn hóa (< 768) ===== */
@media (max-width: 767px) {
  body.ds-landing .ds-container {
    padding-inline: var(--ds-space-5);
  }

  body.ds-landing .ds-section {
    padding-block: var(--ds-space-12);
  }

  body.ds-landing .ds-section--tight {
    padding-block: var(--ds-space-10);
  }

  body.ds-landing h1 { font-size: clamp(2rem, 8vw, 2.75rem); }
  body.ds-landing h2 { font-size: clamp(1.625rem, 6vw, 2.125rem); }
  body.ds-landing h3 { font-size: 1.375rem; }

  body.ds-landing .ds-section-heading p,
  body.ds-landing .ds-hero__sub {
    font-size: var(--ds-fs-base);
  }

  body.ds-landing .ds-btn {
    min-height: 44px;
    padding: var(--ds-space-3) var(--ds-space-5);
  }

  body.ds-landing .ds-btn--sm {
    min-height: 40px;
    padding: var(--ds-space-2) var(--ds-space-4);
  }

  body.ds-landing .ds-btn--lg {
    min-height: 52px;
    padding: var(--ds-space-4) var(--ds-space-6);
  }

  body.ds-landing .ds-hero__actions,
  body.ds-landing .ds-cta-banner__actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  body.ds-landing .ds-hero__actions .ds-btn,
  body.ds-landing .ds-cta-banner__actions .ds-btn {
    width: 100%;
    justify-content: center;
  }

  body.ds-landing .ds-cta-banner {
    padding: var(--ds-space-10) var(--ds-space-5);
    border-radius: var(--ds-radius-xl);
  }

  body.ds-landing .ds-navbar__inner {
    height: 64px;
    gap: var(--ds-space-3);
  }

  body.ds-landing .ds-navbar__brand span {
    font-size: var(--ds-fs-base);
  }

  body.ds-landing .ds-navbar__cta .ds-btn--sm i[data-lucide] {
    display: none;
  }

  body.ds-landing .ds-mobile-menu a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  body.ds-landing .ds-card,
  body.ds-landing .ds-card--feature {
    padding: var(--ds-space-5);
  }

  body.ds-landing .ds-card:hover {
    transform: none;
  }

  body.ds-landing .ds-api-preview__code,
  body.ds-landing .ds-code {
    font-size: 0.75rem;
    padding: var(--ds-space-4);
  }

  body.ds-landing .ds-api-preview__tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }

  body.ds-landing .ds-api-preview__tab {
    flex-shrink: 0;
    min-height: 36px;
  }

  body.ds-landing .ds-faq__item summary {
    font-size: var(--ds-fs-base);
    padding-block: var(--ds-space-4);
    min-height: 56px;
  }

  body.ds-landing .ds-faq__body {
    padding-right: var(--ds-space-2);
    font-size: var(--ds-fs-sm);
  }

  body.ds-landing .ds-hero__proof {
    flex-direction: column;
    gap: var(--ds-space-3);
  }

  body.ds-landing .ds-stat__value {
    font-size: 2rem;
  }

  body.ds-landing .ds-eyebrow {
    font-size: 0.6875rem;
  }

  body.ds-landing .ds-footer {
    padding-block: var(--ds-space-12) var(--ds-space-8);
  }

  body.ds-landing .ds-footer__bottom {
    font-size: 0.6875rem;
  }
}

@media (max-width: 400px) {
  body.ds-landing .ds-navbar__cta .ds-btn {
    padding-inline: var(--ds-space-3);
    font-size: 0.75rem;
  }

  body.ds-landing .ds-navbar__brand span {
    display: none;
  }
}