* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    list-style: none;
}

div {
    display: block;
}

body {
    position: relative;
}

.main {
    width: 100%;
    overflow: hidden;
    background: #fff;
}

.son_dt_box1 {
    margin-top: 100px;
}

.son_dt_box1_cen {
    display: flex;
    justify-content: space-between;
}

.son_dt_box1_l {
    width: 21.43%;
    height: 100%;
    min-height: 100vh;
    background: #f6f6f6;
}

.son_dt_box1_l_top {
    padding-top: 70px;
}

.son_dt_box1_l_top a {
    display: block;
    width: 100%;
    margin-bottom: 35px;
    padding-left: 38px;
    font-size: 18px;
    line-height: 32px;
    height: 32px;
    width: 100%;
    color: #777777;
    font-family: HarmonyOS_Sans_SC_Medium;
    transition: all 0.3s ease;
}

.son_dt_box1_l_top a:hover {
    color: #ff5101;
}

.son_dt_box1_l_top a.active {
    color: #ff5101;
    border-left: 1px solid #ff5101;
}

.son_dt_box1_l_bom ul {
    display: flex;
    flex-direction: column;
}

.son_dt_box1_l_bom ul li {
    margin-bottom: 13px;
}

.son_dt_box1_l_bom ul li a {
    display: flex;
    align-items: center;
    /* justify-content: center; */
    width: 200px;
    height: 65px;
    background: #999999;
    color: #fff;
    font-size: 16px;
    font-family: HarmonyOS_Sans_SC_Medium;
    padding-left: 30px;
    border-top-right-radius: 32.5px;
    border-bottom-right-radius: 32.5px;
    transition: all 0.6s ease;
}

.son_dt_box1_l_bom ul li a.active {
    /* color: #; */
    padding-left: 50px;
    background: #ff5101;
    width: 220px;
}

.son_dt_box1_l_bom ul li a:hover {
    background: #ff5101;
    padding-left: 50px;
    width: 220px;
}

.son_dt_box1_l_bom ul li a span {
    display: block;
    margin-left: 25px;
    font-size: 20px;
}

.son_dt_box1_r {
    width: 73.57%;
    padding-top: 45px;
}

.son_dt_box1_r ul li {
    margin-bottom: 100px;
}

.son_dt_box1_r_title {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    border-bottom: 1px solid #eeeeee;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.son_dt_box1_r_title h6 {
    font-size: 24px;
    line-height: 1;
    position: relative;
    z-index: 2;
    color: #333;
    font-family: HarmonyOS_Sans_SC_Medium;
}

.son_dt_box1_r_title h6::before {
    content: "";
    display: block;
    position: absolute;
    left: 0;
    bottom: 0px;
    width: 100%;
    height: 3px;
    background: #ff5101;
    z-index: -1;
}

.son_dt_box1_r_title p {
    font-size: 18px;
    line-height: 1;
    font-family: GOTHIC;
    color: #b9b9b9;
    letter-spacing: 1px;
    text-transform: uppercase;
    opacity: 0.3;
}

.son_dt_box1_r_bom p {
    font-size: 16px;
    line-height: 30px;
    font-family: HarmonyOS_Sans_SC_Medium;
    color: #777777;
    margin-bottom: 30px;
}

.son_dt_box1_r_bom p:last-child {
    margin-bottom: 0;
}

.son_dt_box1_r_bom img {
    display: block;
    max-width: 100%;
}

@media (max-width: 1600px) {
    .son_dt_box1 {
        margin-top: 80px;
    }

    .son_dt_box1_l_top {
        padding-top: 50px;
    }

    .son_dt_box1_r {
        padding-top: 36px;
    }

    .son_dt_box1_r_title {
        margin-bottom: 30px;
    }

    .son_dt_box1_r_bom p {
        line-height: 26px;
        margin-bottom: 26px;
    }

    .son_dt_box1_r ul li {
        margin-bottom: 80px;
    }
}

@media (max-width: 1400px) {
    .son_dt_box1 {
        margin-top: 60px;
    }

    .son_dt_box1_l_top {
        padding-top: 36px;
    }

    .son_dt_box1_r {
        padding-top: 30px;
    }

    .son_dt_box1_r_title {
        margin-bottom: 23px;
    }

    .son_dt_box1_l_top a {
        margin-bottom: 28px;
    }

    .son_dt_box1_l_bom ul li a {
        width: 200px;
        height: 50px;
    }

    .son_dt_box1_r ul li {
        margin-bottom: 60px;
    }
}

@media (max-width: 1200px) {
    .son_dt_box1 {
        margin-top: 40px;
    }

    .son_dt_box1_l_top {
        padding-top: 28px;
    }

    .son_dt_box1_r {
        padding-top: 26px;
    }

    .son_dt_box1_l_top a {
        margin-bottom: 20px;
    }

    .son_dt_box1_l_top a {
        font-size: 16px;
        padding-left: 28px;
    }

    .son_dt_box1_l_bom ul li a {
        padding-left: 18px;
    }

    .son_dt_box1_l_bom ul li a.active {
        padding-left: 28px;
    }

    .son_dt_box1_l_bom ul li a:hover {
        padding-left: 38px;
    }

    .son_dt_box1_r_title {
        margin-bottom: 18px;
    }

    .son_dt_box1_r_bom p {
        font-size: 15px;
        line-height: 23px;
        margin-bottom: 20px;
    }

    .son_dt_box1_r ul li {
        margin-bottom: 40px;
    }

    .son_dt_box1_l {
        width: 23%;
    }

    .son_dt_box1_l_bom ul li a.active {
        max-width: 95%;
    }

    .son_dt_box1_l_bom ul li a {
        max-width: 85%;
    }

    .son_dt_box1_l_bom ul li a span {
        margin-left: 16px;
    }
}

@media (max-width: 960px) {
    .son_dt_box1_l_bom {
        display: none;
    }

    .son_dt_box1_cen {
        flex-direction: column;
    }

    .son_dt_box1_l {
        height: auto;
        min-height: auto;
    }

    .son_dt_box1_l {
        width: 100%;
    }

    .son_dt_box1_l_top {
        display: flex;
        width: 100%;
    }

    .son_dt_box1_r {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .son_dt_box1 {
        margin-top: 30px;
    }

    .son_dt_box1_l_top {
        padding-top: 15px;
        overflow-x: auto;
    }

    .son_dt_box1_l_top a {
        margin-bottom: 10px;
        white-space: nowrap;
    }

    .son_dt_box1_r_title p {
        font-size: 16px;
    }

    .son_dt_box1_r_bom p {
        font-size: 14px;
        line-height: 22px;
        margin-bottom: 18px;
    }

    .son_dt_box1_r ul li {
        margin-bottom: 36px;
    }

    .son_dt_box1_l_top a {
        font-size: 16px;
        padding-left: 20px;
    }
}