/* 全局样式 */
:root {
  --primary-color: #1E90FF;
  --secondary-color: #FFA500;
  --background-color: #FFFFFF;
  --text-color: #333333;
  --text-light: #777777;
  --border-color: #E0E0E0;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --radius: 8px;
  --spacing: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

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

body {
  font-family: 'Roboto', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing);
}

section {
  margin: var(--spacing-xl) 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--primary-color);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing);
}

.view-all {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s;
}

.view-all:hover {
  color: var(--secondary-color);
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background-color: #1a7fd9;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background-color: transparent;
}

.btn-outline:hover {
  background-color: rgba(30, 144, 255, 0.1);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-icon {
  gap: 0.5rem;
}

/* 轮播图样式 */
.carousel-section {
  margin-top: var(--spacing);
}

.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.carousel-inner {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-item {
  min-width: 100%;
  position: relative;
}

.carousel-image {
  width: 100%;
  height: auto;
  display: block;
}

.carousel-caption {
  position: absolute;
  bottom: 20%;
  left: 10%;
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  max-width: 40%;
}

.carousel-caption h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing);
}

.carousel-caption p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

.carousel-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.5rem;
  transition: all 0.2s;
  z-index: 10;
}

.carousel-control:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

.prev {
  left: var(--spacing);
}

.next {
  right: var(--spacing);
}

.carousel-indicators {
  position: absolute;
  bottom: var(--spacing);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
}

.carousel-indicators button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: background-color 0.2s;
}

.carousel-indicators button.active {
  background-color: white;
}

/* AI工具推荐 */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.tool-card {
  background-color: white;
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow);
  transition: transform 0.2s;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tool-card:hover {
  transform: translateY(-5px);
}

.tool-icon {
  width: 4rem;
  height: 4rem;
  background-color: rgba(30, 144, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing);
  color: var(--primary-color);
  font-size: 1.5rem;
}

.tool-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing);
}

.tool-card p {
  color: var(--text-light);
  margin-bottom: var(--spacing);
  flex: 1;
}

.tool-price {
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: var(--spacing);
}

/* 热门素材 */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.material-card {
  background-color: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.material-card:hover {
  transform: translateY(-5px);
}

.material-thumbnail {
  position: relative;
}

.material-thumbnail img {
  width: 100%;
  height: auto;
  display: block;
}

.download-count {
  position: absolute;
  bottom: var(--spacing);
  right: var(--spacing);
  background-color: rgba(0, 0, 0, 0.6);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.material-info {
  padding: var(--spacing);
}

.material-info h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.material-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: var(--spacing);
}

.tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  background-color: rgba(30, 144, 255, 0.1);
  color: var(--primary-color);
  border-radius: 4px;
}

/* 任务推荐 */
.tasks-list {
  display: grid;
  gap: var(--spacing);
}

.task-card {
  background-color: white;
  border-radius: var(--radius);
  padding: var(--spacing);
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: transform 0.2s;
}

.task-card:hover {
  transform: translateY(-3px);
}

.task-content {
  flex: 1;
}

.task-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.task-desc {
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.task-meta {
  display: flex;
  gap: var(--spacing);
  font-size: 0.875rem;
}

.reward {
  color: var(--secondary-color);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.deadline {
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .carousel-caption {
    max-width: 80%;
    bottom: 10%;
  }
  
  .carousel-caption h2 {
    font-size: 1.75rem;
  }
  
  .carousel-caption p {
    font-size: 1rem;
  }
  
  .tools-grid, .materials-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
  
  .task-card {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing);
  }
}

@media (max-width: 480px) {
  .tools-grid, .materials-grid {
    grid-template-columns: 1fr;
  }
  
  .carousel-caption {
    position: static;
    max-width: 100%;
    color: var(--text-color);
    text-shadow: none;
    padding: var(--spacing);
    background-color: rgba(255, 255, 255, 0.9);
  }
  
  .carousel-caption h2 {
    font-size: 1.5rem;
  }
}