/* 导航视口宽度在 1100px 到 1280px 之间时生效 */
        @media screen and (min-width: 968px) and (max-width: 1280px) {
              .header-nav .nav-a{
                font-size: 10px !important;
                line-height: 2.2rem !important;
              }
            }
        
        /* 导航视口宽度在 1280px 到 1440px 之间时生效 */
        @media screen and (min-width: 1280px) and (max-width: 1350px) {
              .header-nav .nav-a{
                font-size: 15px !important;
                line-height: 2.2rem !important;
              }
            }
            
        /* 导航视口宽度在 1280px 到 1440px 之间时生效 */
        @media screen and (min-width: 1350px) and (max-width: 1440px) {
              .header-nav .nav-a{
                font-size: 11px !important;
                line-height: 2.2rem !important;
              }
            }
             /* 导航视口宽度在 1280px 到 1440px 之间时生效 */
        @media screen and (min-width: 1441px) and (max-width: 1499px) {
              .header-nav .nav-a{
                font-size: 12px !important;
                line-height: 2.2rem !important;
              }
            }
            
        @media screen and (min-width: 1500px) and (max-width: 1720px) {
              .header-nav .nav-a{
                font-size: 15px !important;
                line-height: 2.2rem !important;
              }
            }
          /* 导航视口宽度在 1398px 到 1500px 之间时生效 */
        /*@media screen and (min-width: 1398px) and (max-width: 1900px) {*/
        /*      .header-nav .nav-a{*/
        /*        font-size: 15px !important;*/
        /*        line-height: 2.2rem !important;*/
        /*      }*/
        /*    }*/