:root {
  --primary-color: #000;
  --secondary-color: #06c;
  --background-color: #fff;
  --text-color: #1d1d1f;
  --card-background: #fbfbfd;
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.47059;
  font-weight: 400;
  letter-spacing: -0.022em;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.content-wrapper {
  flex: 1;
  padding-top: 10px;
  padding-bottom: 20px;
}

header {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  padding: 0 5%;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 44px;
  display: flex;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

main {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 3rem 1rem 1rem;
}

.hero {
  text-align: center;
  margin-bottom: 2rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 0.1rem 0.1rem;
  border-radius: 20px;
  color: white;
}

h1 {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.slogan {
  font-size: 1.8rem;
  margin-bottom: 3.5rem;
  font-weight: 400;
  opacity: 0.9;
}

.search-container {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
}

.tools-section h2 {
  text-align: center;
  font-size: 3rem;
  margin-bottom: 4rem;
  color: var(--primary-color);
  font-weight: 700;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 3rem;
}

.tool-card {
  background-color: var(--card-background);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
  text-align: center;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.tool-icon {
  font-size: 4rem;
  color: var(--secondary-color);
  margin-bottom: 2rem;
}

.tool-title {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.tool-description {
  font-size: 1.1rem;
  color: #86868b;
  line-height: 1.5;
}

footer {
  background-color: var(--card-background);
  color: #86868b;
  text-align: center;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 3rem;
  }
  
  .slogan {
    font-size: 1.5rem;
  }
}

.language-selector {
  position: relative;
  display: inline-block;
}

.language-button {
  background: none;
  border: none;
  padding: 8px 12px;
  font-size: 14px;
  cursor: pointer;
  color: #333;
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: white;
  border-radius: 4px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  list-style-type: none;
  padding: 0;
  margin: 4px 0 0;
  z-index: 1000;
  max-height: 200px;
  overflow-y: auto;
  min-width: 120px;
}

.language-dropdown li {
  padding: 8px 16px;
  cursor: pointer;
}

.language-dropdown li:hover {
  background-color: #f5f5f5;
}

@media (max-width: 768px) {
  .language-dropdown {
    right: auto;
    left: 0;
  }
}

.footer-separator {
  display: inline-block;
  width: 1px;
  height: 1em;
  background-color: #ccc;
  margin: 0 8px;
  vertical-align: middle;
}

.footer-link {
  text-decoration: none;
  color: inherit; /* 保持与父元素相同的颜色，可以根据需要调整 */
}

.footer-link:hover {
  text-decoration: none; /* 悬停时也不显示下划线 */
}

/* 如果需要进一步去除所有链接的下划线，可以添加以下全局样式 */
.footer a {
  text-decoration: none;
  color: inherit;
}

.footer a:hover {
  text-decoration: none;
}