:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2234;
  --bg-card-hover: #1f2a40;
  --accent: #00d4ff;
  --accent2: #7c3aed;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --border-color: #1e293b;
  --navbar-height: 64px;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  padding-top: var(--navbar-height);
  min-height: 100vh;
}

/* Navbar */
.navbar {
  background: rgba(10, 14, 23, 0.95) !important;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  min-height: var(--navbar-height);
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-icon {
  -webkit-text-fill-color: initial;
  color: #ff4d6a;
}

.nav-link {
  color: var(--text-secondary) !important;
  font-size: 0.9rem;
  padding: 0.5rem 0.8rem !important;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent) !important;
  background: rgba(0, 212, 255, 0.08);
}

.search-input {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-primary) !important;
  border-radius: 8px !important;
}

.search-input:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.15) !important;
}

.btn-search {
  background: linear-gradient(135deg, var(--accent), var(--accent2)) !important;
  border: none !important;
  color: white !important;
  border-radius: 8px !important;
}

/* Main content */
.main-content {
  min-height: calc(100vh - var(--navbar-height) - 200px);
  padding-top: 1.5rem;
  padding-bottom: 2rem;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(124, 58, 237, 0.05));
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2rem;
}

.hero-title {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat .number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
}

.hero-stat .label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s ease;
  overflow: hidden;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 212, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.card-img-top {
  height: 180px;
  object-fit: cover;
  background: var(--bg-secondary);
}

.card-body {
  padding: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-title a {
  color: var(--text-primary);
  text-decoration: none;
}

.card-title a:hover {
  color: var(--accent);
}

.card-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  background: transparent;
  border-top: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Category Card */
.cat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.3s ease;
  text-decoration: none;
  color: var(--text-primary);
  display: block;
}

.cat-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-3px);
  color: var(--accent);
  text-decoration: none;
}

.cat-card .cat-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.cat-card .cat-name {
  font-size: 0.95rem;
  font-weight: 600;
}

.cat-card .cat-count {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Post Detail */
.post-header {
  margin-bottom: 1.5rem;
}

.post-title {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

.post-meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.post-meta span {
  margin-right: 1rem;
}

.post-cover {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  background: var(--bg-secondary);
}

.post-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.post-content h2, .post-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.post-content p {
  margin-bottom: 1rem;
}

.post-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 1rem 0;
}

.post-content a {
  color: var(--accent);
}

.post-content ul, .post-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  background: rgba(0, 212, 255, 0.05);
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
}

.post-content code {
  background: var(--bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-content pre {
  background: var(--bg-secondary);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

/* Download Box */
.download-box {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(124, 58, 237, 0.08));
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.download-box .btn-download {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
  color: white;
  padding: 0.6rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s;
}

.download-box .btn-download:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.download-info {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.download-info strong {
  color: var(--text-primary);
}

/* Sidebar */
.sidebar-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
}

/* Tags */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  margin: 0.2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
}

.tag:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* Breadcrumb */
.breadcrumb-custom {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.breadcrumb-custom a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb-custom span {
  color: var(--text-secondary);
}

/* Pagination */
.pagination {
  margin-top: 2rem;
}

.page-link {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  border-radius: 8px !important;
  margin: 0 0.2rem;
}

.page-link:hover {
  background: var(--bg-card-hover);
  color: var(--accent);
  border-color: var(--accent);
}

.page-item.active .page-link {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border: none;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 3rem;
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer a:hover {
  color: var(--accent);
}

.footer h5, .footer h6 {
  color: var(--text-primary);
}

/* Section Headers */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.section-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
}

.section-header .more-link {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
}

/* Featured Carousel */
.featured-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  height: 280px;
  background: var(--bg-card);
}

.featured-card .featured-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.featured-card .featured-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
}

.featured-card .featured-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
  display: block;
}

.featured-card .featured-title:hover {
  color: var(--accent);
}

.featured-card .featured-cat {
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-secondary);
}

.empty-state .empty-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.3;
}

/* Tags page */
.tag-item {
  display: inline-block;
  padding: 0.4rem 1rem;
  margin: 0.3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all 0.2s;
  font-size: 0.9rem;
}

.tag-item:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.tag-item .count {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* About page */
.about-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
}

.about-section h4 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title { font-size: 1.4rem; }
  .post-title { font-size: 1.4rem; }
  .hero-stats { gap: 1rem; }
  .card-img-top { height: 150px; }
  .featured-card { height: 200px; }
  .featured-card .featured-title { font-size: 1.1rem; }
}