/* 框架 */
     section {
         position: relative;
         z-index: 1;
         overflow: hidden;
         width: 100%;
         padding: 120px 0;
     }

     @media (max-width: 1200px) {
         section {
             padding: 90px 0;
         }
     }

     @media (max-width: 720px) {
         section {
             padding: 60px 0;
         }
     }

     /* 标题 */
     .indexTitle h1 {
         font-weight: 700;
         font-size: 42px;
         text-align: center;
         color: #222222;
     }

     @media (max-width: 1200px) {
         .indexTitle h1 {
             font-size: 36px;
         }
     }

     @media (max-width: 720px) {
         .indexTitle h1 {
             font-size: 28px;
         }
     }