/* 滚动条整体部分 */
::-webkit-scrollbar {
    width: 10px; /* 滚动条的宽度 */
    height: 12px; /* 滚动条的高度 */
  }
          * {
              margin: 0;
              padding: 0;
              box-sizing: border-box;
          }
          
          body {
              font-family: "Microsoft YaHei", sans-serif;
              line-height: 1.6;
              color: #333;
              background-color: #f5f5f5;
          }
          
          .container {
              display: flex;
              max-width: 1200px;
              margin: 0 auto;
              padding: 20px;
          }
          img{
              display: block;
              max-width: 100%;
          }
          /* 内容区域样式 */
          .content {
              width: 600px;
              flex: 1;
              background: #fff;
              padding: 30px;
              border-radius: 5px;
              box-shadow: 0 1px 3px rgba(0,0,0,0.1);
          }
          
          h2 {
              font-size: 22px;
              margin: 30px 0 15px;
              padding-bottom: 10px;
              border-bottom: 1px solid #eee;
              color: #333;
          }
          
          h5 {
              font-size: 16px;
              margin: 20px 0 10px;
              color: #666;
          }
          
          p {
              /* margin-bottom: 15px; */
              font-size: 15px;
              line-height: 1.8;
          }
          
          /* 目录区域样式 */
          .catalog-container {
              width: 280px;
              margin-left: 20px;
              position: sticky;
              top: 20px;
              align-self: flex-start;
              background: #fff;
              border-radius: 5px;
              box-shadow: 0 1px 3px rgba(0,0,0,0.1);
              padding: 15px;
              max-height: 90vh;
              overflow-y: auto;
          }
          
          .catalog-title {
              font-size: 18px;
              font-weight: bold;
              padding: 10px 0;
              margin-bottom: 10px;
              border-bottom: 1px solid #eee;
              color: #333;
          }
          
          .catalog-list {
              list-style: none;
          }
          
          .catalog-item-h2 {
              padding: 8px 0;
              cursor: pointer;
              transition: all 0.2s;
              font-size: 15px;
              border-left: 3px solid transparent;
              padding-left: 15px;
              margin-left: -15px;
          }
          
          .catalog-item-h2:hover {
              color: #36c;
              background-color: #f5f5f5;
          }
          
          .catalog-item-h2.active {
              color: #36c;
              border-left-color: #36c;
              background-color: #f0f4ff;
              font-weight: bold;
          }
          
          .catalog-item-h5 {
              padding: 5px 0 5px 25px;
              cursor: pointer;
              transition: all 0.2s;
              font-size: 14px;
              color: #666;
          }
          
          .catalog-item-h5:hover {
              color: #36c;
          }
          
          .catalog-item-h5.active {
              color: #36c;
              font-weight: bold;
          }
          
          /* 响应式设计 */
          @media (max-width: 768px) {
              .container {
                  flex-direction: column;
              }
              
              .catalog-container {
                  width: 100%;
                  margin-left: 0;
                  margin-bottom: 20px;
                  position: static;
                  display: none;
              }
              .content {
                width: 100%;
                flex: 1;
                background: #fff;
                padding: 15px;
                border-radius: 5px;
                box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            }
            h2 {
                font-size: 22px;
                margin: 10px 0;
                padding-bottom: 10px;
                border-bottom: 1px solid #eee;
                color: #333;
            }
          }