/* 
 * 赢政天下 2.0 - AI世界的中文入口
 * 社区贡献样式表
 * 版本: 2.1.0
 * 日期: 2025-04-03
 */

/* ======================================================================
   共建AI知识生态区域
   ====================================================================== */

.community-contribution {
  text-align: center;
  padding: 50px 0;
  background-color: var(--bg-light);
  margin: 50px 0;
  border-radius: 8px;
}

.community-contribution h2 {
  font-size: 28px;
  color: var(--primary-dark);
  margin-bottom: 40px;
}

.contribution-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.contribution-card {
  background-color: white;
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease;
}

.contribution-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.contribution-card i {
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 20px;
}

.contribution-card h3 {
  color: var(--primary-dark);
  font-size: 20px;
  margin-bottom: 15px;
}

.contribution-card p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.contribution-card .action-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  transition: var(--transition-fast);
}

.contribution-card .action-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ======================================================================
   加入社区区域
   ====================================================================== */

.join-community {
  background-color: white;
  border-radius: 12px;
  padding: 40px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  max-width: 800px;
  margin: 50px auto;
}

.join-community h3 {
  color: var(--primary-dark);
  font-size: 24px;
  margin-bottom: 20px;
}

.join-community p {
  color: var(--text-secondary);
  margin-bottom: 30px;
  line-height: 1.6;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.cta-buttons a {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  min-width: 160px;
}

.primary-cta {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 4px 6px rgba(59, 89, 152, 0.2);
}

.primary-cta:hover {
  background-color: var(--primary-dark);
  box-shadow: 0 6px 8px rgba(59, 89, 152, 0.3);
  transform: translateY(-3px);
}

.secondary-cta {
  border: 2px solid var(--primary);
  color: var(--primary);
  background-color: white;
}

.secondary-cta:hover {
  background-color: rgba(59, 89, 152, 0.1);
  transform: translateY(-3px);
}

/* ======================================================================
   响应式调整
   ====================================================================== */

/* 大屏幕 - 桌面端 */
@media (min-width: 1200px) {
  .contribution-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 中等屏幕 - 平板 */
@media (max-width: 992px) {
  .contribution-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 小屏幕 - 手机横屏 */
@media (max-width: 768px) {
  .contribution-cards {
    grid-template-columns: 1fr;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-buttons a {
    width: 100%;
  }
  
  .join-community {
    padding: 30px 20px;
  }
  
  .community-contribution h2 {
    font-size: 26px;
  }
}

/* 极小屏幕 - 手机竖屏 */
@media (max-width: 480px) {
  .community-contribution {
    padding: 30px 15px;
  }
  
  .contribution-card {
    padding: 20px;
  }
  
  .contribution-card i {
    font-size: 36px;
  }
  
  .community-contribution h2 {
    font-size: 24px;
  }
  
  .join-community h3 {
    font-size: 22px;
  }
}

/* ======================================================================
   特定主题适配（如果需要不同的主题）
   ====================================================================== */

/* 深色主题 */
@media (prefers-color-scheme: dark) {
  .contribution-card {
    background-color: #2a2a2a;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }
  
  .contribution-card h3 {
    color: #e0e0e0;
  }
  
  .contribution-card p {
    color: #b0b0b0;
  }
  
  .join-community {
    background-color: #2a2a2a;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  }
  
  .join-community h3 {
    color: #e0e0e0;
  }
  
  .join-community p {
    color: #b0b0b0;
  }
  
  .secondary-cta {
    border-color: var(--primary-light);
    color: var(--primary-light);
    background-color: transparent;
  }
}

/* 辅助功能支持 */
@media (prefers-reduced-motion: reduce) {
  .contribution-card,
  .contribution-card:hover,
  .primary-cta:hover,
  .secondary-cta:hover {
    transition: none;
    transform: none;
  }
}