/* ============================================
   网址导航页面样式
   ============================================ */

.nav-container {
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
  min-height: calc(100vh - var(--header-height) - 400px);
}

/* 分类区块 */
.nav-section {
  margin-bottom: var(--spacing-2xl);
}

.nav-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-light);
  position: relative;
}

.nav-section-title::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.title-text {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.title-text::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--primary);
  border-radius: 2px;
}

/* 网站网格 */
.nav-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--spacing-base);
}

/* 网站卡片 */
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) var(--spacing-sm);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.nav-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
  text-decoration: none;
}

.nav-item:hover::before {
  transform: scaleX(1);
}

.nav-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  background: var(--bg-hover);
}

.nav-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 默认图标 - 渐变色 */
.default-icon {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  font-size: var(--font-size-xl);
  font-weight: 600;
  border-radius: var(--radius-md);
}

/* 不同分类的渐变色 */
.nav-section:nth-child(1) .default-icon {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.nav-section:nth-child(2) .default-icon {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.nav-section:nth-child(3) .default-icon {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.nav-section:nth-child(4) .default-icon {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.nav-section:nth-child(5) .default-icon {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.nav-section:nth-child(6) .default-icon {
  background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
}

.nav-name {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-align: center;
  font-weight: 500;
  line-height: 1.4;
  transition: color var(--transition-fast);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item:hover .nav-name {
  color: var(--primary);
}

/* 响应式 */
@media (max-width: 1200px) {
  .nav-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
  }
  
  .nav-item {
    padding: var(--spacing-md) var(--spacing-xs);
  }
  
  .nav-icon {
    width: 40px;
    height: 40px;
  }
  
  .nav-name {
    font-size: var(--font-size-xs);
  }
}

@media (max-width: 480px) {
  .nav-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}