/* ============================================
   classroom.css - 创作课堂样式
   ============================================ */

.classroom-main {
  padding: var(--space-xl) 0 var(--space-3xl);
  background: var(--color-bg);
  min-height: 85vh;
}

/* 轮播 */
.carousel-section {
  margin-bottom: var(--space-2xl);
}

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

.carousel-slide {
  flex: 0 0 100%;
}

.slide-content {
  height: 320px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  align-items: center;
  padding: var(--space-2xl);
  color: white;
  position: relative;
  overflow: hidden;
}

.slide-text {
  z-index: 2;
}

.slide-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.slide-text h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.slide-text p {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  margin-bottom: var(--space-xl);
}

.slide-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.visual-circle {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 72px;
  color: white;
  animation: pulse 3s ease infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.carousel-dots {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-sm);
  z-index: 3;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.carousel-dot.active {
  width: 28px;
  border-radius: var(--radius-full);
  background: white;
}

.carousel-arrows {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 var(--space-md);
  pointer-events: none;
  z-index: 3;
}

.carousel-arrow {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  pointer-events: all;
  transition: all var(--transition-fast);
  border: none;
}

.carousel-arrow:hover {
  background: rgba(255,255,255,0.4);
}

/* 分类 */
.category-section {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.category-tabs {
  margin-bottom: var(--space-md);
}

/* 课程网格 */
.courses-grid {
  margin-bottom: var(--space-2xl);
}

.course-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.course-thumb {
  position: relative;
  height: 160px;
  overflow: hidden;
}

.course-thumb .thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: rgba(255,255,255,0.9);
}

.course-thumb .tag {
  position: absolute;
  top: 10px;
  left: 10px;
}

.course-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-family: monospace;
}

.course-body {
  padding: var(--space-lg);
}

.course-body h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-body p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
}

.course-info-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-lighter);
  flex-wrap: wrap;
}

.course-info-row > span:first-child {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.course-info-row .tag {
  margin-left: auto;
}

.more-courses {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

/* 学习路径 */
.path-section {
  padding: var(--space-2xl) 0;
}

.learning-paths {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.path-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.path-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.path-header {
  padding: var(--space-xl);
  color: white;
  text-align: center;
}

.path-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
}

.path-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 4px;
}

.path-count {
  font-size: var(--font-size-sm);
  opacity: 0.85;
}

.path-body {
  padding: var(--space-xl);
}

.path-step {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  border-bottom: 1px dashed var(--color-border-light);
}

.path-step:last-of-type {
  margin-bottom: var(--space-lg);
}

.path-step .step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.1);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

/* 响应式 */
@media (max-width: 1024px) {
  .courses-grid { grid-template-columns: repeat(3, 1fr); }
  .learning-paths { grid-template-columns: 1fr; }
  .slide-content { grid-template-columns: 1fr; text-align: center; }
  .slide-visual { display: none; }
}

@media (max-width: 768px) {
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .slide-content { padding: var(--space-lg); height: 240px; }
  .slide-text h2 { font-size: var(--font-size-2xl); }
  .slide-text p { font-size: var(--font-size-base); }
}

@media (max-width: 480px) {
  .courses-grid { grid-template-columns: 1fr; }
}