/* 
 * 数学可视化平台 - 简洁主页样式
 * 为首页提供简洁的设计
 */

/* 导入基础变量 */
@import 'clean-theme.css';

/* 主页特有样式 */
.hero-section {
  padding: 60px 0;
  background-color: var(--background-color);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
  margin-bottom: 40px;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 15px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--light-text);
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.experiment-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.experiment-card {
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.experiment-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.experiment-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
}

.experiment-placeholder {
  width: 100%;
  height: 180px;
  background-color: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--light-text);
  font-size: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.experiment-body {
  padding: 20px;
}

.experiment-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--text-color);
}

.experiment-description {
  color: var(--light-text);
  margin-bottom: 15px;
  line-height: 1.5;
}

.experiment-button {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s ease;
}

.experiment-button:hover {
  background-color: #2952a3;
  text-decoration: none;
  color: white;
}

.about-section {
  background-color: var(--background-color);
  padding: 40px;
  border-radius: 8px;
  margin-bottom: 40px;
  border: 1px solid var(--border-color);
}

.about-section h2 {
  font-size: 1.8rem;
  margin-top: 0;
  margin-bottom: 20px;
  color: var(--text-color);
}

.about-section p {
  color: var(--text-color);
  line-height: 1.6;
  margin-bottom: 15px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.feature-item {
  background-color: var(--background-color);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  text-align: center;
}

.feature-icon {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-color);
}

.feature-description {
  color: var(--light-text);
  font-size: 0.9rem;
  line-height: 1.5;
}

.contact-section {
  margin-bottom: 40px;
  background-color: var(--background-color);
  padding: 30px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background-color: #ffffff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.contact-image {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 3px solid var(--primary-color);
}

.contact-info {
  flex: 1;
  color: var(--text-color);
}

.contact-info h3 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.3rem;
  color: var(--text-color);
  font-weight: 600;
}

.contact-info p {
  color: var(--text-color);
  margin-bottom: 15px;
  line-height: 1.5;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  background-color: var(--primary-color);
  border: none;
  border-radius: 4px;
  color: white;
  text-decoration: none;
  font-size: 0.9rem;
  transition: background-color 0.2s ease;
}

.contact-link:hover {
  background-color: #2952a3;
  text-decoration: none;
  color: white;
}

/* 顶部导航 */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
  margin-bottom: 30px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  text-decoration: none;
}

.nav-logo:hover {
  color: var(--text-color);
  text-decoration: none;
}

.nav-logo i {
  color: var(--primary-color);
  margin-right: 8px;
}

.nav-links {
  display: flex;
  gap: 20px;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  padding: 5px 0;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.2s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .contact-card {
    flex-direction: column;
    text-align: center;
  }
  
  .contact-image {
    width: 80px;
    height: 80px;
  }
  
  .contact-links {
    justify-content: center;
  }
  
  .top-nav {
    flex-direction: column;
    gap: 15px;
  }
}