/* ===== Site header & footer ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  gap: 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.site-logo:hover {
  text-decoration: none;
  color: var(--color-primary);
}

.site-logo__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

.site-nav__link--active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.site-nav__cta {
  padding: 8px 18px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none !important;
  transition: background var(--transition);
}

.site-nav__cta:hover,
.site-nav__cta:focus-visible {
  background: var(--color-primary-dark);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 1.25rem;
}

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 40px 20px 32px;
  margin-top: auto;
}

.site-footer__inner {
  max-width: var(--max-content-width);
  margin: 0 auto;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.site-footer__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.site-footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer__links a {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.site-footer__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.site-footer__bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ===== Page layout ===== */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-main {
  flex: 1;
}

.content-page {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.content-page__header {
  margin-bottom: 40px;
  text-align: center;
}

.content-page__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.3;
}

.content-page__subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto;
}

.content-section {
  margin-bottom: 48px;
}

.content-section h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary-light);
  color: var(--color-text);
}

.content-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--color-text);
}

.content-section p {
  margin-bottom: 16px;
  color: var(--color-text);
}

.content-section ul,
.content-section ol {
  margin: 0 0 16px 24px;
  color: var(--color-text);
}

.content-section li {
  margin-bottom: 8px;
}

.info-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin: 24px 0;
}

.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.info-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.info-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.info-card__icon--blue { background: var(--color-primary-light); }
.info-card__icon--green { background: var(--color-accent-light); }
.info-card__icon--purple { background: #ede9fe; }
.info-card__icon--orange { background: #ffedd5; }

.info-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.info-card__text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.step-list {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
}

.step-list__item {
  counter-increment: step;
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.step-list__item::before {
  content: counter(step);
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
}

.step-list__content h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.case-card {
  background: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 24px 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.case-card__tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.case-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-banner {
  text-align: center;
  padding: 40px 24px;
  background: linear-gradient(135deg, var(--color-primary-light), #ede9fe);
  border-radius: var(--radius-lg);
  margin-top: 48px;
}

.cta-banner__title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-banner__text {
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none !important;
  transition: background var(--transition), transform var(--transition);
  min-height: 44px;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff !important;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text) !important;
  border: 1px solid var(--color-border);
}

.btn--secondary:hover {
  background: var(--color-bg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 20px 20px;
    box-shadow: var(--shadow-md);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav__link,
  .site-nav__cta {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}