:root {
  --md-primary: #6750A4;
  --md-primary-container: #EADDFF;
  --md-on-primary: #FFFFFF;
  --md-on-primary-container: #21005E;
  --md-secondary: #625B71;
  --md-secondary-container: #E8DEF8;
  --md-on-secondary: #FFFFFF;
  --md-on-secondary-container: #1E192B;
  --md-tertiary: #7D5260;
  --md-tertiary-container: #FFD8E4;
  --md-on-tertiary: #FFFFFF;
  --md-on-tertiary-container: #370B1E;
  --md-surface: #FFFBFE;
  --md-surface-variant: #E7E0EC;
  --md-on-surface: #1C1B1F;
  --md-on-surface-variant: #49454E;
  --md-outline: #79747E;
  --md-shadow: rgba(0, 0, 0, 0.15);
  
  /* 自定义间距 */
  --spacing-xs: 4px;
  --spacing-s: 8px;
  --spacing-m: 16px;
  --spacing-l: 24px;
  --spacing-xl: 32px;
  
  /* 圆角 */
  --radius-s: 4px;
  --radius-m: 12px;
  --radius-l: 16px;
  --radius-xl: 28px;
}

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

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: #f5f5f5;
  color: var(--md-on-surface);
  line-height: 1.6;
  padding: var(--spacing-m);
}

.container {
  max-width: 600px;
  margin: 0 auto;
}

.video-card {
  background-color: var(--md-surface);
  border-radius: var(--radius-l);
  box-shadow: 0 2px 10px var(--md-shadow);
  overflow: hidden;
  margin-bottom: var(--spacing-l);
  padding: var(--spacing-l);
}

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

.author-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-m);
}

.avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--md-primary-container);
}

.small-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.author-details h3 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.author-details p {
  font-size: 0.85rem;
  color: var(--md-on-surface-variant);
}

.follow-btn {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  border: none;
  border-radius: var(--radius-xl);
  padding: var(--spacing-s) var(--spacing-l);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
}

.follow-btn:hover {
  background-color: #5842a0;
}

.video-content {
  margin-bottom: var(--spacing-m);
}

.title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-m);
  line-height: 1.4;
}

.video-container {
  position: relative;
  border-radius: var(--radius-m);
  overflow: hidden;
  background-color: #000;
  aspect-ratio: 9/16;
  margin-bottom: var(--spacing-m);
}

.cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s;
}

.play-button .material-symbols-outlined {
  color: white;
  font-size: 36px;
}

.play-button:hover {
  background-color: rgba(0, 0, 0, 0.7);
}

.video-stats {
  display: flex;
  gap: var(--spacing-l);
  margin-bottom: var(--spacing-m);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--md-on-surface-variant);
}

.material-symbols-outlined {
  font-variation-settings: 'FILL' 1;
}

.music-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-m);
  padding: var(--spacing-m);
  background-color: var(--md-surface-variant);
  border-radius: var(--radius-m);
  margin-bottom: var(--spacing-m);
}

.music-details {
  flex: 1;
}

.action-buttons {
  display: flex;
  justify-content: space-around;
  padding-top: var(--spacing-m);
  border-top: 1px solid var(--md-surface-variant);
}

.action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--md-on-surface-variant);
  transition: color 0.2s;
}

.action-btn:hover {
  color: var(--md-primary);
}

/* 移动端适配 */
@media (max-width: 600px) {
  body {
    padding: var(--spacing-s);
  }
  
  .video-card {
    padding: var(--spacing-m);
  }
  
  .avatar {
    width: 40px;
    height: 40px;
  }
  
  .author-details h3 {
    font-size: 0.95rem;
  }
  
  .author-details p {
    font-size: 0.75rem;
  }
  
  .follow-btn {
    padding: var(--spacing-xs) var(--spacing-m);
    font-size: 0.85rem;
  }
  
  .title {
    font-size: 1rem;
  }
  
  .play-button {
    width: 48px;
    height: 48px;
  }
  
  .play-button .material-symbols-outlined {
    font-size: 28px;
  }
}