/* 全局样式 */
:root {
  --primary-color: #3b82f6;
  --secondary-color: #1d4ed8;
  --background-color: #f3f4f6;
  --card-background: #ffffff;
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.5;
}

/* 导航栏样式 */
.navbar {
  background-color: var(--card-background);
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.nav-logo {
  width: 24px;
  height: 24px;
  vertical-align: middle;
}

.nav-menu {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-item {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s;
}

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

/* 语言切换样式 */
.language-switcher {
  position: relative;
  margin-left: auto;
}

.language-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--primary-color);
  border-radius: 0.5rem;
  background: transparent;
  color: var(--primary-color);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

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

.language-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: white;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  padding: 0.5rem 0;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s;
}

.language-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-item {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

.language-item:hover {
  background: var(--background-color);
}

.language-item.active {
  color: var(--primary-color);
  background: var(--background-color);
}

/* 搜索框样式 */
.search-container {
  max-width: 600px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* 分类过滤按钮样式 */
.category-filter {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0 2rem;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.25rem;
  background-color: #e5e7eb;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover, .filter-btn.active {
  background-color: var(--primary-color);
  color: white;
}

/* 网格容器样式 */
.grid-container {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 2.25rem;
  padding: 0 2rem;
  margin-bottom: 2rem;
}

/* 卡片样式 */
.card {
  background-color: var(--card-background);
  border-radius: 1rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s, box-shadow 0.2s;
  overflow: hidden;
  min-width: 0;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card-logo {
  padding: 0.25rem;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #f9fafb;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.card-logo img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.card-content {
  padding: 0.25rem;
}

.card-content h3 {
  margin-bottom: 0.2rem;
  color: var(--text-primary);
  font-size: 0.65rem;
  font-weight: 600;
}

.card-content p {
  color: var(--text-secondary);
  font-size: 0.6rem;
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.2;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
  margin-bottom: 0.25rem;
  padding: 0;
}

.tag {
  background-color: #f3f4f6;
  color: var(--primary-color);
  padding: 0.1rem 0.2rem;
  border-radius: 0.75rem;
  font-size: 0.55rem;
  font-weight: 500;
  border: 1px solid var(--primary-color);
}

.card-link {
  display: block;
  padding: 0.2rem;
  text-align: center;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  transition: all 0.2s;
  font-size: 0.6rem;
  font-weight: 500;
  border-radius: 0.75rem;
  margin: 0 0.25rem 0.25rem;
}

/* 响应式设计 */
@media (max-width: 1600px) {
  .grid-container {
    grid-template-columns: repeat(5, 1fr);
    gap: 2.25rem;
  }
}

@media (max-width: 1400px) {
  .grid-container {
    grid-template-columns: repeat(4, 1fr);
    gap: 2.25rem;
  }
}

@media (max-width: 1200px) {
  .grid-container {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 900px) {
  .grid-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }
  
  .navbar {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .nav-left {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
  }

  .language-switcher {
    margin: 0;
  }

  .language-menu {
    left: 50%;
    right: auto;
    transform: translateX(-50%) translateY(-10px);
  }

  .language-menu.show {
    transform: translateX(-50%) translateY(0);
  }
}

@media (max-width: 600px) {
  .grid-container {
    grid-template-columns: 1fr;
    padding: 0 1rem;
    gap: 1.5rem;
  }

  .category-filter {
    padding: 0 1rem;
    justify-content: center;
  }
}