/* ========================================
   🔥 热门 AI Agent 特色入口
   ======================================== */

.featured-section {
  padding: var(--space-3xl) 0 var(--space-lg);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.featured-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  text-decoration: none;
  color: #fff;
  cursor: pointer;
}

.featured-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.featured-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.featured-card:hover::before {
  opacity: 1;
}

/* 小龙虾配色 */
.featured-openclaw {
  background: linear-gradient(135deg, #dc2626, #f97316, #dc2626);
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
}

.featured-openclaw::before {
  background: linear-gradient(135deg, #b91c1c, #ea580c, #b91c1c);
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
}

/* 爱马仕配色 */
.featured-hermes {
  background: linear-gradient(135deg, #d97706, #f59e0b, #92400e);
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
}

.featured-hermes::before {
  background: linear-gradient(135deg, #b45309, #d97706, #78350f);
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.featured-badge {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: #fff;
}

.featured-card-body {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  position: relative;
  z-index: 1;
}

.featured-icon {
  font-size: 3.5rem;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.featured-info {
  flex: 1;
  min-width: 0;
}

.featured-name {
  font-size: var(--text-xl);
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.featured-nickname {
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 2px 10px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
}

.featured-desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.featured-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.featured-tag {
  padding: 3px 10px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(4px);
}

.featured-cta {
  display: inline-flex;
  align-items: center;
  align-self: flex-end;
  margin-top: var(--space-md);
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  transition: all var(--transition-fast);
  position: relative;
  z-index: 1;
}

.featured-card:hover .featured-cta {
  background: rgba(255, 255, 255, 0.35);
}

/* 响应式 - 移动端单列 */
@media (max-width: 768px) {
  .featured-grid {
    grid-template-columns: 1fr;
  }

  .featured-icon {
    font-size: 2.5rem;
  }

  .featured-name {
    font-size: var(--text-lg);
  }
}

/* ========================================
   分类导航
   ======================================== */

.categories-section {
  padding: var(--space-3xl) 0 var(--space-xl);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.category-card.active {
  background: var(--color-primary-bg);
  border-color: var(--color-primary);
}

.category-card .category-icon {
  font-size: 2rem;
  line-height: 1;
}

.category-card .category-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.category-card .category-desc {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  line-height: 1.4;
}

/* ========================================
   筛选栏
   ======================================== */

.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

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

.filter-btn.active {
  color: #ffffff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-divider {
  width: 1px;
  height: 20px;
  background: var(--border-color);
  margin: 0 var(--space-xs);
}

.tools-count {
  margin-left: auto;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

/* ========================================
   工具卡片网格
   ======================================== */

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
  overflow: hidden;
  /* a 标签重置 */
  text-decoration: none;
  color: inherit;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

.tool-card:hover::before {
  opacity: 1;
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.tool-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  color: white;
  font-weight: 700;
}

.tool-info {
  flex: 1;
  min-width: 0;
}

.tool-name {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.tool-name .badge {
  flex-shrink: 0;
}

.tool-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.tool-tag {
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  line-height: 1.6;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color-light);
}

.tool-visit-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  transition: all var(--transition-fast);
}

.tool-visit-btn:hover {
  background: var(--color-primary);
  color: white;
}

.tool-visit-btn .arrow {
  transition: transform var(--transition-fast);
}

.tool-visit-btn:hover .arrow {
  transform: translateX(2px);
}

/* ========================================
   空状态
   ======================================== */

.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--text-tertiary);
}

.empty-state .empty-icon {
  font-size: 4rem;
  margin-bottom: var(--space-md);
}

.empty-state .empty-text {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.empty-state .empty-hint {
  font-size: var(--text-sm);
}

/* ========================================
   分类区块标题
   ======================================== */

.category-section {
  padding: var(--space-xl) 0;
}

.category-section-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--border-color);
}

.category-section-header .cat-icon {
  font-size: var(--text-2xl);
}

.category-section-header .cat-name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.category-section-header .cat-count {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-left: var(--space-sm);
}