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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.logo {
  font-size: 32px;
  color: #1890ff;
  text-align: center;
  margin-bottom: 10px;
}

.slogan {
  text-align: center;
  color: #666;
  margin-bottom: 40px;
}

h2 {
  color: #1890ff;
  margin: 30px 0 20px;
  font-size: 24px;
}

p {
  margin-bottom: 15px;
  color: #666;
}

.optimization-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.optimization-card {
  background: white;
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: flex-start;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.optimization-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.optimization-card .icon {
  font-size: 2rem;
  color: #1890ff;
  margin-right: 20px;
  flex-shrink: 0;
}

.optimization-card .content {
  flex: 1;
}

.optimization-card .title {
  font-size: 18px;
  color: #1890ff;
  margin-bottom: 10px;
  font-weight: 600;
}

.optimization-card .desc {
  color: #666;
  font-size: 14px;
}

.highlight {
  color: #1890ff;
  font-weight: 500;
}

.brain-section {
  margin: 50px 0;
}

.brain-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.brain-card {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.brain-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.brain-card .icon {
  font-size: 2.5rem;
  color: #1890ff;
  margin-bottom: 20px;
}

.brain-card .title {
  font-size: 20px;
  color: #1890ff;
  margin-bottom: 15px;
  font-weight: 600;
}

.brain-card .desc {
  color: #666;
  margin-bottom: 20px;
}

.brain-card .features {
  list-style: none;
  margin-top: 20px;
}

.brain-card .features li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
  color: #666;
}

.brain-card .features li:before {
  content: "•";
  color: #1890ff;
  position: absolute;
  left: 0;
  font-size: 1.2em;
}

.brain-card .process-icon {
  position: absolute;
  bottom: 20px;
  right: 20px;
  font-size: 1.5rem;
  color: #1890ff;
  opacity: 0.2;
}

footer {
  text-align: center;
  margin-top: 50px;
  color: #999;
  font-size: 14px;
}

@media (max-width: 768px) {
  .optimization-section,
  .brain-container {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 20px;
  }
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.language-switch {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  padding: 0.5rem 1rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: white;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lang-btn:hover {
  background: #f5f5f5;
}

.lang-btn.active {
  background: #007bff;
  color: white;
  border-color: #007bff;
}

/* 添加语言切换器样式 */
.language-switcher {
  position: absolute;
  top: 20px;
  right: 20px;
}

.language-switcher select {
  padding: 5px 10px;
  border: 1px solid #1890ff;
  border-radius: 4px;
  background: white;
  color: #1890ff;
  cursor: pointer;
  font-size: 14px;
}

.language-switcher select:hover {
  background: #f0f7ff;
}