/* ========================================
       更新日志页面专用样式 - 科技感升级版
       ======================================== */
    
    /* 版本列表容器 */
    .changelog {
      padding: var(--space-3xl) 0;
      background: linear-gradient(180deg, var(--bg-secondary) 0%, #e8f0fe 50%, var(--bg-secondary) 100%);
      position: relative;
    }

    .changelog::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.2), transparent);
    }
    
    .changelog__timeline {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
    }
    
    /* 时间线中轴线 */
    .changelog__timeline::before {
      content: '';
      position: absolute;
      left: 24px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: linear-gradient(180deg, #2563eb 0%, #06b6d4 50%, rgba(6, 182, 212, 0.1) 100%);
    }
    
    /* 版本卡片 */
    .changelog-version {
      position: relative;
      margin-bottom: var(--space-xl);
    }
    
    .changelog-version::before {
      content: '';
      position: absolute;
      left: 16px;
      top: 24px;
      width: 18px;
      height: 18px;
      background: var(--bg-primary);
      border: 3px solid #2563eb;
      border-radius: 50%;
      z-index: 1;
      box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
      transition: all 0.3s ease;
    }

    .changelog-version:hover::before {
      box-shadow: 0 0 25px rgba(59, 130, 246, 0.6);
      transform: scale(1.1);
    }
    
    .changelog-version__header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: var(--space-lg) var(--space-xl);
      margin-left: 50px;
      background: rgba(255, 255, 255, 0.95);
      border: 1px solid rgba(59, 130, 246, 0.1);
      border-radius: var(--radius-xl);
      cursor: pointer;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      backdrop-filter: blur(10px);
      box-shadow: 0 4px 15px rgba(17, 24, 39, 0.04);
    }
    
    .changelog-version__header:hover {
      border-color: rgba(59, 130, 246, 0.3);
      transform: translateX(6px);
      box-shadow: 0 8px 25px rgba(59, 130, 246, 0.1);
    }
    
    .changelog-version__header.active {
      border-color: rgba(59, 130, 246, 0.3);
      border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    }
    
    .changelog-version__info {
      display: flex;
      align-items: center;
      gap: var(--space-lg);
    }
    
    .changelog-version__badge {
      padding: var(--space-xs) var(--space-md);
      background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
      border-radius: var(--radius-full);
      font-size: var(--font-size-sm);
      font-weight: var(--font-weight-bold);
      color: var(--white);
      box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
    }
    
    .changelog-version__title {
      font-size: var(--font-size-xl);
      font-weight: var(--font-weight-bold);
      color: var(--text-primary);
    }
    
    .changelog-version__date {
      font-size: var(--font-size-sm);
      color: var(--text-secondary);
    }
    
    .changelog-version__toggle {
      width: 36px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(6, 182, 212, 0.05) 100%);
      border: 1px solid rgba(59, 130, 246, 0.1);
      border-radius: var(--radius-full);
      color: var(--text-secondary);
      transition: all 0.3s ease;
    }
    
    .changelog-version__toggle svg {
      transition: transform 0.3s ease;
    }
    
    .changelog-version__header.active .changelog-version__toggle {
      background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
      border-color: transparent;
      color: var(--white);
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    }
    
    .changelog-version__header.active .changelog-version__toggle svg {
      transform: rotate(180deg);
    }
    
    /* 版本内容区域 */
    .changelog-version__content {
      display: none;
      margin-left: 50px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(59, 130, 246, 0.1);
      border-top: none;
      border-radius: 0 0 var(--radius-xl) var(--radius-xl);
      padding: var(--space-xl);
      backdrop-filter: blur(10px);
    }
    
    .changelog-version__content.active {
      display: block;
      animation: slideDown 0.3s ease;
    }
    
    @keyframes slideDown {
      from {
        opacity: 0;
        transform: translateY(-10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    /* 更新类型分组 */
    .changelog-section {
      margin-bottom: var(--space-xl);
    }
    
    .changelog-section:last-child {
      margin-bottom: 0;
    }
    
    .changelog-section__title {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
      font-size: var(--font-size-base);
      font-weight: var(--font-weight-semibold);
      margin-bottom: var(--space-md);
      padding-bottom: var(--space-sm);
      border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    }
    
    .changelog-section__icon {
      width: 26px;
      height: 26px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-md);
      transition: all 0.3s ease;
    }

    .changelog-section:hover .changelog-section__icon {
      transform: scale(1.1);
    }
    
    .changelog-section--feature .changelog-section__title {
      color: #2563eb;
    }
    
    .changelog-section--feature .changelog-section__icon {
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.15) 0%, rgba(59, 130, 246, 0.1) 100%);
      color: #2563eb;
      box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
    }
    
    .changelog-section--optimize .changelog-section__title {
      color: #f59e0b;
    }
    
    .changelog-section--optimize .changelog-section__icon {
      background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(251, 191, 36, 0.1) 100%);
      color: #f59e0b;
      box-shadow: 0 2px 8px rgba(245, 158, 11, 0.15);
    }
    
    .changelog-section--fix .changelog-section__title {
      color: #10b981;
    }
    
    .changelog-section--fix .changelog-section__icon {
      background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(52, 211, 153, 0.1) 100%);
      color: #10b981;
      box-shadow: 0 2px 8px rgba(16, 185, 129, 0.15);
    }
    
    /* 更新项列表 */
    .changelog-list {
      display: flex;
      flex-direction: column;
      gap: var(--space-sm);
    }
    
    .changelog-item {
      display: flex;
      align-items: flex-start;
      gap: var(--space-md);
      padding: var(--space-md);
      background: rgba(255, 255, 255, 0.6);
      border: 1px solid rgba(59, 130, 246, 0.05);
      border-radius: var(--radius-md);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .changelog-item:hover {
      background: rgba(255, 255, 255, 0.9);
      border-color: rgba(59, 130, 246, 0.15);
      transform: translateX(4px);
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.08);
    }
    
    .changelog-item__bullet {
      width: 8px;
      height: 8px;
      min-width: 8px;
      margin-top: 7px;
      background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
      border-radius: 50%;
      box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
      transition: all 0.3s ease;
    }

    .changelog-item:hover .changelog-item__bullet {
      transform: scale(1.2);
    }
    
    .changelog-section--optimize .changelog-item__bullet {
      background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
      box-shadow: 0 2px 6px rgba(245, 158, 11, 0.3);
    }
    
    .changelog-section--fix .changelog-item__bullet {
      background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
      box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
    }
    
    .changelog-item__text {
      font-size: var(--font-size-base);
      color: var(--text-primary);
      line-height: var(--line-height-normal);
    }
    
    /* 响应式设计 */
    @media (max-width: 768px) {
      .changelog__timeline::before {
        left: 12px;
      }
      
      .changelog-version::before {
        left: 4px;
        width: 14px;
        height: 14px;
      }
      
      .changelog-version__header {
        margin-left: 30px;
        padding: var(--space-md);
        flex-wrap: wrap;
        gap: var(--space-md);
      }
      
      .changelog-version__content {
        margin-left: 30px;
        padding: var(--space-md);
      }
      
      .changelog-version__info {
        flex-wrap: wrap;
        gap: var(--space-sm);
      }
      
      .changelog-version__title {
        font-size: var(--font-size-lg);
        width: 100%;
      }
      
      .changelog-version__date {
        width: 100%;
      }
    }
    
    /* Hero 区域更新日志样式 */
    .changelog-hero {
      padding: 140px 0 80px;
      position: relative;
      overflow: hidden;
    }
    
    .changelog-hero__bg {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, var(--bg-secondary) 0%, #e8f0fe 50%, var(--bg-primary) 100%);
    }
    
    .changelog-hero__grid {
      position: absolute;
      inset: 0;
      background-image: 
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
      background-size: 60px 60px;
    }
    
    .changelog-hero__glow {
      position: absolute;
      border-radius: 50%;
      filter: blur(100px);
      opacity: 0.5;
    }
    
    .changelog-hero__glow--1 {
      width: 400px;
      height: 400px;
      background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
      top: -100px;
      right: 10%;
      opacity: 0.12;
    }
    
    .changelog-hero__glow--2 {
      width: 300px;
      height: 300px;
      background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
      bottom: -50px;
      left: 5%;
      opacity: 0.08;
    }
    
    .changelog-hero__content {
      position: relative;
      text-align: center;
      z-index: 1;
    }
    
    .changelog-hero__badge {
      display: inline-flex;
      align-items: center;
      gap: var(--space-sm);
      padding: var(--space-sm) var(--space-lg);
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(59, 130, 246, 0.15);
      border-radius: var(--radius-full);
      font-size: var(--font-size-sm);
      color: #2563eb;
      margin-bottom: var(--space-xl);
      backdrop-filter: blur(10px);
      box-shadow: 0 4px 15px rgba(59, 130, 246, 0.1);
    }
    
    .changelog-hero__title {
      font-size: var(--font-size-5xl);
      font-weight: var(--font-weight-bold);
      margin-bottom: var(--space-lg);
      background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #06b6d4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    
    .changelog-hero__subtitle {
      font-size: var(--font-size-xl);
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto;
      line-height: var(--line-height-relaxed);
    }
    
    @media (max-width: 768px) {
      .changelog-hero {
        padding: 120px 0 60px;
      }
      
      .changelog-hero__title {
        font-size: var(--font-size-3xl);
      }
      
      .changelog-hero__subtitle {
        font-size: var(--font-size-base);
      }
    }
    
    /* 过滤标签 */
    .changelog-filters {
      display: flex;
      justify-content: center;
      gap: var(--space-md);
      margin-bottom: var(--space-2xl);
      flex-wrap: wrap;
    }
    
    .changelog-filter {
      padding: var(--space-sm) var(--space-lg);
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(59, 130, 246, 0.1);
      border-radius: var(--radius-full);
      font-size: var(--font-size-sm);
      color: var(--text-secondary);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      backdrop-filter: blur(10px);
    }
    
    .changelog-filter:hover {
      border-color: rgba(59, 130, 246, 0.3);
      color: #2563eb;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
    }
    
    .changelog-filter.active {
      background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
      border-color: transparent;
      color: var(--white);
      box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
    }