:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --accent: #0ea5e9;
  --bg: #f1f5f9;
  --surface: #ffffff;
  --text: #0f172a;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --success: #10b981;
  --danger: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 8px 30px rgba(15, 23, 42, 0.12);
  --header-h: 64px;
  --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--primary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--primary-dark); }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: var(--header-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.logo:hover { color: var(--text); }
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.header-search {
  flex: 1;
  max-width: 360px;
  display: flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.header-search input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 16px;
  font-size: 0.9rem;
  outline: none;
}
.header-search button {
  border: none;
  background: transparent;
  padding: 0 14px;
  color: var(--text-secondary);
  cursor: pointer;
}

.nav-main { display: flex; gap: 4px; }
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.user-menu { display: flex; align-items: center; gap: 10px; }
.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.85rem;
  overflow: hidden;
}
.user-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* 用户菜单与退出 */
.user-dropdown { position: relative; }
.user-menu-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px 4px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.user-menu-btn:hover {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.user-menu-text { max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-role-tag {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 4px;
  font-weight: 600;
}
.user-role-tag.teacher-role {
  background: #dc3545;
  color: white;
}
.user-menu-chevron { flex-shrink: 0; color: var(--text-secondary); }
.user-dropdown-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 150;
  padding: 6px 0;
}
.user-dropdown-panel a,
.user-dropdown-panel .dropdown-logout {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text);
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}
.user-dropdown-panel a:hover,
.user-dropdown-panel .dropdown-logout:hover {
  background: var(--bg);
  color: var(--primary);
}
.user-dropdown-panel hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 6px 0;
}
.user-dropdown-panel .dropdown-logout {
  color: var(--danger);
  font-weight: 500;
}
.user-dropdown-panel .dropdown-logout:hover {
  color: var(--danger);
  background: #fef2f2;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-top: 8px;
}
.footer-links a { font-size: 0.9rem; }
.footer-logout {
  border: none;
  background: none;
  color: var(--danger);
  font-size: 0.9rem;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}
.footer-logout:hover { text-decoration: underline; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg); color: var(--text); }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-block { width: 100%; }
.btn-danger { background: var(--danger); color: #fff; }

/* Main */
.site-main { flex: 1; padding: 28px 0 48px; }
.impersonate-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 10px 16px;
  background: #fef3c7;
  color: #92400e;
  border-bottom: 1px solid #fcd34d;
  font-size: 0.9rem;
}
.impersonate-bar[hidden] { display: none !important; }

/* Hero */
.hero {
  background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #0ea5e9 100%);
  border-radius: 20px;
  padding: 48px 40px;
  color: #fff;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 280px;
  height: 280px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}
.hero h1 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; position: relative; }
.hero p { opacity: 0.9; font-size: 1.05rem; max-width: 520px; position: relative; }
.hero-actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; position: relative; }
.hero .btn-primary { background: #fff; color: var(--primary); box-shadow: none; }
.hero .btn-ghost { border-color: rgba(255,255,255,0.5); color: #fff; }
.hero .btn-ghost:hover { background: rgba(255,255,255,0.15); color: #fff; }

/* Layout */
.layout-2col {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 24px;
  align-items: start;
}
@media (max-width: 900px) {
  .layout-2col { grid-template-columns: 1fr; }
}

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}
.card-body { padding: 20px; }
.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

/* Section pills */
.section-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  padding-bottom: 4px;
  overflow-x: auto;
}
.section-pill {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}
.section-pill:hover { border-color: var(--primary); color: var(--primary); }
.section-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* Post list */
.post-list { display: flex; flex-direction: column; gap: 12px; }
.post-item {
  display: block;
  padding: 0;
  color: inherit;
  transition: transform 0.15s, box-shadow 0.15s;
}
.post-item-link {
  display: block;
  padding: 20px 20px 0;
  color: inherit;
  text-decoration: none;
}
.post-item-link:hover { color: inherit; }
.post-item-link:hover h3 { color: var(--primary); }
.item-pin-row { display: flex; justify-content: flex-end; padding: 8px 20px 12px; }
.post-item:hover {
  color: inherit;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.post-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.post-meta .tag {
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 500;
}
.post-excerpt {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Post detail */
.post-detail-header { margin-bottom: 24px; }
.post-detail-header h1 { font-size: 1.75rem; font-weight: 700; line-height: 1.35; margin-bottom: 12px; }
.post-images {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
  margin: 20px 0;
}
.post-images img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.post-content {
  font-size: 1rem;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}
.post-actions {
  display: flex;
  gap: 12px;
  margin: 24px 0;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.15s;
}
.action-btn:hover, .action-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.action-btn.action-danger { color: #dc2626; border-color: #fecaca; }
.action-btn.action-danger:hover { background: #fee2e2; color: #b91c1c; border-color: #fca5a5; }

/* Comments */
.comment-list { margin-top: 20px; }
.comment-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.comment-item:last-child { border-bottom: none; }
.comment-author { font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; }
.comment-time { font-size: 0.8rem; color: var(--text-secondary); margin-left: 8px; font-weight: 400; }
.comment-body { font-size: 0.95rem; }
.comment-replies {
  margin: 12px 0 0 20px;
  padding-left: 16px;
  border-left: 2px solid var(--primary-light);
}
.comment-form {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.comment-form textarea {
  flex: 1;
  min-height: 80px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  resize: vertical;
}
.comment-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* Teacher */
.teacher-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.teacher-card {
  padding: 24px;
  color: inherit;
  transition: transform 0.15s, box-shadow 0.15s;
}
.teacher-card:hover { color: inherit; transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.teacher-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
.teacher-card .title { color: var(--primary); font-size: 0.9rem; font-weight: 500; }
.teacher-filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.teacher-filters select {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  background: var(--surface);
}

/* Forms */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  font-size: 0.9rem;
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
textarea.form-control { min-height: 160px; resize: vertical; }

/* Sidebar widget */
.widget { margin-bottom: 20px; }
.hot-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.hot-tag {
  padding: 6px 14px;
  background: var(--bg);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.hot-tag:hover { background: var(--primary-light); color: var(--primary); }

/* Profile */
.profile-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px;
  margin-bottom: 24px;
}
.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}
.tab {
  padding: 12px 20px;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: inherit;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Search */
.search-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.search-tab {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
}
.search-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Login */
.auth-card {
  max-width: 420px;
  margin: 40px auto;
  padding: 40px;
}
.auth-card h2 { text-align: center; margin-bottom: 28px; font-size: 1.5rem; }
.auth-switch { text-align: center; margin-top: 20px; font-size: 0.9rem; color: var(--text-secondary); }

/* Empty & loading */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-secondary);
}
.loading { text-align: center; padding: 40px; color: var(--text-secondary); }
.skeleton {
  background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
  border-radius: var(--radius-sm);
  height: 80px;
  margin-bottom: 12px;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Pagination */
.sticky-badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 2px 8px;
  background: #fef3c7;
  color: #b45309;
  border-radius: 4px;
  margin-right: 8px;
  font-weight: 500;
}
.btn-pin {
  font-size: 0.75rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-secondary);
  white-space: nowrap;
}
.btn-pin:hover { border-color: var(--primary); color: var(--primary); }
.btn-pin-unpin { color: #b45309; border-color: #fcd34d; }
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}
.pagination button {
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
}
.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }
.pagination button.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  z-index: 200;
  opacity: 0;
  transition: all 0.3s;
  pointer-events: none;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Image upload preview */
.image-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}
.image-preview-item {
  position: relative;
  width: 100px;
  height: 100px;
}
.image-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}
.image-preview-item button {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.6);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}

/* 轮播图 */
.carousel {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: var(--shadow-lg);
  background: var(--text);
  aspect-ratio: 3 / 1;
  min-height: 200px;
  max-height: 400px;
}
.carousel-track { position: relative; width: 100%; height: 100%; }
.carousel-item {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}
.carousel-item.active { opacity: 1; pointer-events: auto; z-index: 1; }
.carousel-slide {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  color: inherit;
}
.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.carousel-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 24px 28px;
  background: linear-gradient(transparent, rgba(0,0,0,0.55));
  color: #fff;
  font-size: 1.25rem;
  font-weight: 600;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  line-height: 1;
}
.carousel-btn.prev { left: 16px; }
.carousel-btn.next { right: 16px; }
.carousel-dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  gap: 8px;
}
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  padding: 0;
}
.carousel-dot.active { background: #fff; width: 24px; border-radius: 4px; }

/* 通知公告 */
.announce-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  margin-bottom: 8px;
}
.announce-icon { font-size: 1.2rem; flex-shrink: 0; }
.announce-scroll {
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 0.9rem;
}
.announce-scroll a { color: var(--text); margin-right: 16px; }
.announce-scroll a:hover { color: var(--primary); }
.announce-more { font-size: 0.85rem; flex-shrink: 0; white-space: nowrap; }
.announce-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 8px; }
.announce-item {
  display: block;
  padding: 16px 20px;
  color: inherit;
  position: relative;
}
.announce-item:hover { color: inherit; box-shadow: var(--shadow-lg); }
.announce-item h4 { font-size: 1rem; margin: 6px 0; }
.announce-item p { font-size: 0.85rem; color: var(--text-secondary); margin: 0; }
.announce-item time { font-size: 0.8rem; color: var(--text-secondary); }
.announce-type {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.announce-type.announcement { background: #fef3c7; color: #92400e; }
.announce-type.notice { background: var(--primary-light); color: var(--primary); }
.announce-top {
  font-size: 0.7rem;
  background: var(--danger);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
}
.announce-detail .content {
  white-space: pre-wrap;
  line-height: 1.8;
  margin-top: 20px;
}

/* 404 */
.page-404 {
  text-align: center;
  padding: 80px 20px;
}
.page-404 h1 { font-size: 4rem; color: var(--primary); margin-bottom: 16px; }

/* Responsive */
@media (max-width: 768px) {
  .nav-main, .header-search { display: none; }
  .nav-toggle { display: flex; }
  .header-inner.nav-open .nav-main {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  .hero { padding: 32px 24px; }
  .hero h1 { font-size: 1.5rem; }
}