/* Creative Layouts - 创意布局系统 */

/* 大数字展示 - 适合数据驱动的课程 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-2xl);
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.hero-stat-item {
  position: relative;
  padding: var(--spacing-xl);
  background: white;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.hero-stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.hero-stat-number {
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

.hero-stat-label {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
}

.hero-stat-desc {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
}

.stat-unit {
  font-size: 2rem;
  margin-left: 0.2em;
}

/* 亮点数据展示 - 特殊样式 */
.highlight-stats {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(236, 72, 153, 0.05));
  border-radius: var(--radius-xl);
  padding: var(--spacing-3xl);
  margin: var(--spacing-3xl) 0;
}

.highlight-stats .hero-stat-item {
  background: white;
  border: 2px solid transparent;
  box-shadow: var(--shadow-md);
}

.highlight-stats .hero-stat-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-2xl);
}

/* 特色亮点卡片 - 横向布局 */
.feature-highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin: var(--spacing-3xl) 0;
}

.feature-highlight-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.feature-highlight-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  transition: transform var(--transition-slow);
}

.feature-highlight-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
}

.feature-highlight-card:hover::before {
  transform: translate(-25%, -25%);
}

.feature-highlight-card:nth-child(2) {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  box-shadow: 0 10px 30px rgba(245, 87, 108, 0.3);
}

.feature-highlight-card:nth-child(2):hover {
  box-shadow: 0 20px 40px rgba(245, 87, 108, 0.4);
}

.feature-highlight-card:nth-child(3) {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  box-shadow: 0 10px 30px rgba(79, 172, 254, 0.3);
}

.feature-highlight-card:nth-child(3):hover {
  box-shadow: 0 20px 40px rgba(79, 172, 254, 0.4);
}

.feature-highlight-card:nth-child(4) {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  box-shadow: 0 10px 30px rgba(67, 233, 123, 0.3);
}

.feature-highlight-card:nth-child(4):hover {
  box-shadow: 0 20px 40px rgba(67, 233, 123, 0.4);
}

.feature-number {
  font-size: 5rem;
  font-weight: var(--font-weight-bold);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.feature-unit {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.5px;
}

.feature-desc {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  line-height: 1.6;
}

/* 数据展示 - 简洁扁平风格 */
.stats-showcase {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin: var(--spacing-2xl) 0;
}

.stat-showcase-item {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl) var(--spacing-xl);
  text-align: center;
  border-left: 4px solid var(--primary-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: all var(--transition-base);
}

.stat-showcase-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
  border-left-width: 6px;
}

.stat-showcase-item:nth-child(1) {
  border-left-color: #667eea;
}

.stat-showcase-item:nth-child(2) {
  border-left-color: #f093fb;
}

.stat-showcase-item:nth-child(3) {
  border-left-color: #4facfe;
}

.stat-showcase-item:nth-child(4) {
  border-left-color: #43e97b;
}

.stat-showcase-number {
  font-size: 3.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  line-height: 1;
  display: inline-block;
}

.stat-showcase-item:nth-child(1) .stat-showcase-number {
  color: #667eea;
}

.stat-showcase-item:nth-child(2) .stat-showcase-number {
  color: #f093fb;
}

.stat-showcase-item:nth-child(3) .stat-showcase-number {
  color: #4facfe;
}

.stat-showcase-item:nth-child(4) .stat-showcase-number {
  color: #43e97b;
}

.stat-showcase-unit {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  display: inline-block;
  margin-left: 0.2em;
  vertical-align: baseline;
}

.stat-showcase-label {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: var(--spacing-md) 0 var(--spacing-sm);
}

.stat-showcase-desc {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* 时间线布局 - 适合学习路径 */
.timeline {
  position: relative;
  padding: var(--spacing-2xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
  position: relative;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  flex: 1;
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.timeline-number {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
  box-shadow: var(--shadow-colored);
  z-index: 1;
}

/* 图片+文字混排 - 适合故事性内容 */
.story-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  margin: var(--spacing-3xl) 0;
}

.story-section:nth-child(even) {
  direction: rtl;
}

.story-section:nth-child(even) > * {
  direction: ltr;
}

.story-image {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  box-shadow: var(--shadow-xl);
}

.story-content h3 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.story-content p {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--text-secondary);
}

/* 价值主张卡片 - 大卡片布局 */
.value-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
  margin: var(--spacing-3xl) 0;
}

.value-card {
  background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6));
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  border: 2px solid var(--border-light);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.value-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.1) 0%, transparent 70%);
  transition: transform var(--transition-slow);
}

.value-card:hover::before {
  transform: translate(-25%, -25%);
}

.value-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary-color);
}

.value-card-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  display: block;
}

.value-card h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.value-card p {
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--text-secondary);
}

/* 特色标签墙 */
.tag-wall {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  margin: var(--spacing-2xl) 0;
}

.tag-item {
  padding: var(--spacing-md) var(--spacing-xl);
  background: white;
  border: 2px solid var(--primary-light);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--primary-color);
  transition: all var(--transition-base);
  cursor: default;
}

.tag-item:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.05);
}

/* 对比表格 */
.comparison-table {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin: var(--spacing-3xl) 0;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--border-light);
}

.comparison-row:last-child {
  border-bottom: none;
}

.comparison-cell {
  padding: var(--spacing-xl);
}

.comparison-cell:first-child {
  background: var(--bg-secondary);
  font-weight: var(--font-weight-semibold);
  border-right: 1px solid var(--border-light);
}

.comparison-cell:last-child {
  background: var(--primary-light);
}

/* 响应式 */
@media (max-width: 1024px) {
  .feature-highlights {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-showcase {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .timeline::before {
    left: 30px;
  }
  
  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: row;
    padding-left: 80px;
  }
  
  .timeline-number {
    position: absolute;
    left: 0;
  }
  
  .story-section,
  .story-section:nth-child(even) {
    grid-template-columns: 1fr;
    direction: ltr;
  }
  
  .story-image {
    height: 250px;
  }
  
  .value-cards {
    grid-template-columns: 1fr;
  }
  
  .hero-stat-number {
    font-size: 3rem;
  }
  
  .feature-highlights {
    grid-template-columns: 1fr;
  }
  
  .feature-number {
    font-size: 4rem;
  }
  
  .stats-showcase {
    grid-template-columns: 1fr;
  }
  
  .stat-showcase-number {
    font-size: 2.5rem;
  }
}