.about_us .i_title  { text-align: center; margin-bottom: 33px;}
    .about_us .i_content .paragraph{line-height: 1.8; margin-bottom: 33px; }
    .about_us .i_title .cn_name{ line-height: 1.2; color: #000000; font-size: clamp(20px,2.61vw,50px); }
    .about_us .i_title .en_name{margin-top: 1px; color: #9b9b9b; font-size: clamp(16px,1.46vw,28px);}
    .about_us .i_content{ text-align: center; max-width: 74%; margin: 0 auto; color: #000000; font-size: clamp(13px,.83vw,16px);}
    .nav_box{border-bottom: 1px solid #e5e5e5;margin-bottom: 4.3%;}
    .nav_box .nav_list{grid-template-columns: repeat(5, 1fr);width: 92%;margin: 0 auto;display: grid;}
    .nav_box .nav_list .nav_title{text-align: center;}
    .nav_box .nav_list .nav_title a{font-size: 26px;color: #000000;padding: 17px 0;text-decoration: none;}
    @media screen and (max-width:1000px) {
        .about_us .i_content { max-width: 100%;}
    }