.about_us .l span p {
    margin: .45rem 0 0 0;
    line-height: .5625rem;
}

.about_us {
    padding: .875rem 0;
    box-sizing: border-box;
}

.about_us .l,
.about_us .r {
    width: 45%;
}

.about_us .l h4::after {
    content: " ";
    display: block;
    margin: .3125rem 0;
    width: .85rem;
    height: .1rem;
    background-color: #000;
}

.about_us .l h4 {
    margin: .375rem 0 0 0;
}

.about_us .r img {
    display: block;
    width: 100%;
}

.four_unit ul li {
    width: 25%;
}

.four_unit ul li a .p_box {
    position: relative;
}

.four_unit ul li a .p_box img {
    display: block;
    width: 100%;
    height: 9.375rem;
}

.four_unit ul li a .p_box .text_box {
    position: absolute;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 .625rem;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    color: #000;
}

.four_unit ul li a .p_box .text_box h5 {
    margin: .25rem 0 .75rem 0;
}

.four_unit ul li a .p_box .text_box h6 {
    margin: .25rem 0 0 0;
}

.four_unit ul li a .p_box .text_box span {
    font-size: 14px;
    line-height: .45rem;
    display: none;
    /* display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 5;
    overflow: hidden; */
}

.email_box {
    margin: .75rem 0 0 0;
    padding: 15px;
    box-sizing: border-box;
    border-radius: 10px;
    border: 2px solid #fff;
    line-height: .5625rem;
}

.four_unit ul li a:hover .p_box .text_box {
    background-color: rgba(237, 101, 63, 0.5);
    transition: all 0.6s;
}

.four_unit ul li a:hover .p_box .text_box span {
    display: block;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 8;
    overflow: hidden;
}

.contact_us .l {
    padding: 1.875rem 10% 1.875rem 10%;
    width: 45%;
    background-color: #F7F7F7;
    box-sizing: border-box;
}

.contact_us .l dl dt {
    font-size: .4rem;
}

.contact_us .l dl dt::after {
    content: " ";
    display: block;
    width: .8625rem;
    height: .1rem;
    margin: .625rem 0;
    background-color: #000;
}

.contact_us .l dl {
    margin: .375rem 0 0 0;
}

.contact_us .r {
    width: 60%;
}

.contact_us .l dl dd {
    margin: 0 0 .75rem 0;
}

.contact_us .l dl dd p {
    line-height: 1.5;
}

.contact_phone i {
    font-size: 16px;
}

.contact_phone {
    font-weight: bold;
    color: #ED653F;
}

#map {
    width: 100%;
    height: 100%;
}

@media screen and (max-width: 1680px) {}

@media screen and (max-width: 1600px) {}

@media screen and (max-width: 1440px) {}

@media screen and (max-width: 1366px) {
    .four_unit ul li a .p_box .text_box h5 {
        font-size: 18px;
    }
    .four_unit ul li a .p_box .text_box span {
        font-size: 16px;
    }
    .email_box {
        font-size: 18px;
    }
    .four_unit ul li a .p_box .text_box h4 {
        font-size: ;
    }
}

@media screen and (max-width: 1280px) {}

@media screen and (max-width: 1024px) {}

@media screen and (max-width: 980px) {
    .about_us .l,
    .about_us .r {
        width: 100%;
    }
    .about_us {
        flex-wrap: wrap;
    }
    .about_us .r {
        margin: 15px 0 0 0;
    }
    .about_us .l span p {
        line-height: 1.5;
    }
    .four_unit ul {
        flex-wrap: wrap;
    }
    .four_unit ul li {
        margin: 0 0 15px 0;
        width: 100%;
    }
    .contact_us .l,
    .contact_us .r {
        width: 100%;
    }
    .contact_us {
        flex-wrap: wrap;
    }
    #map {
        height: 500px;
    }
    .four_unit ul li a .p_box .text_box span {
        line-height: 1.5;
    }
    .four_unit ul li a .p_box img {
        width: 0.1px;
    }
    .four_unit ul li {
        width: 50%;
    }
    .four_unit ul li:nth-child(1) a .p_box {
        background-image: url(../image/index/图层\ 3.png);
        background-repeat: no-repeat;
        background-size: 100% 100%;
        background-position: center center;
    }
    .four_unit ul li:nth-child(2) a .p_box {
        background-image: url(../image/index/图层\ 4.png);
        background-repeat: no-repeat;
        background-size: 100% 100%;
    }
    .four_unit ul li:nth-child(3) a .p_box {
        background-image: url(../image/index/图层\ 4.png);
        background-repeat: no-repeat;
        background-size: 100% 100%;
    }
    .four_unit ul li:nth-child(4) a .p_box {
        background-image: url(../image/index/图层\ 5.png);
        background-repeat: no-repeat;
        background-size: 100% 100%;
    }
    .about_us .l img,
    .contact_us .l img {
        display: block;
        width: 100%;
    }
    .four_unit ul li a .p_box {
        padding: 50px 0;
    }
    .email_box {
        line-height: 1.5;
    }
    .bannerhead {
        margin: 60px 0 0 0;
    }
    .four_unit ul li a:hover .p_box .text_box span {
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 5;
        overflow: hidden;
    }
    .four_unit ul li a .p_box img {
        height: 12.5rem;
    }
}

@media screen and (max-width: 768px) {}

@media screen and (max-width: 640px) {
    .four_unit ul li a .p_box {
        padding: 60px 0;
    }
}

@media screen and (max-width: 375px) {}