:root {
  --page-primary: #3b82f6;
  --page-primary-hover: #2563eb;
  --page-text: #111827;
  --page-muted: #4b5563;
  --page-border: #e5e7eb;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

.static-page {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  color: var(--page-text);
  background: #fff;
}

.static-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid var(--page-border);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
}

.header-inner {
  max-width: 1280px;
  height: 60px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-size: 20px;
  font-weight: 700;
}

.brand img {
  object-fit: contain;
}

.desktop-nav {
  display: none;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: 32px;
}

.desktop-nav a,
.mobile-menu nav a {
  color: var(--page-muted);
}

.desktop-nav a:hover,
.mobile-menu nav a:hover,
.static-header a[aria-current='page'] {
  color: var(--page-primary);
}

.static-header a[aria-current='page'] {
  font-weight: 600;
}

.register-link {
  margin-left: auto;
  padding: 10px 20px;
  border-radius: 8px;
  background: var(--page-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.register-link:hover {
  background: var(--page-primary-hover);
}

.mobile-menu > summary {
  display: flex;
  align-items: center;
  padding: 8px;
  cursor: pointer;
}

.mobile-menu nav {
  position: absolute;
  inset: 60px 0 auto;
  display: grid;
  gap: 4px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--page-border);
  background: #fff;
}

.mobile-menu:not([open]) nav {
  display: none;
}

.mobile-menu nav a {
  padding: 12px 0;
}

summary {
  list-style: none;
  cursor: pointer;
}

summary::-webkit-details-marker {
  display: none;
}

.static-page .faq-content {
  max-height: none;
  overflow: visible;
}

.static-page details[open] .faq-icon {
  transform: rotate(180deg);
}

.static-page .scroll-reveal {
  opacity: 1;
  transform: none;
}

.static-page .bar {
  height: var(--bar-h);
}

.static-page :focus-visible {
  outline: 2px solid var(--page-primary);
  outline-offset: 4px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-bottom: 48px;
}

.footer-brand {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: auto;
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr));
  }

  .desktop-nav {
    display: flex;
  }

  .mobile-menu {
    display: none;
  }
}

@media (max-width: 420px) {
  .header-inner {
    gap: 8px;
    padding: 0 12px;
  }

  .brand {
    font-size: 18px;
  }

  .register-link {
    padding: 8px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .static-page *,
  .static-page *::before,
  .static-page *::after {
    animation: none !important;
    transition: none !important;
  }
}