.case {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 522px;
    padding-top: 96px;
    padding-bottom: 83px;
    width: 100%;
}

.case .title {
    margin-bottom: 0px;
}

.vice {
    color: #000028;
    font-size: 18px;
    line-height: 1.5;
    font-weight: 500;
    margin-bottom: 18px;
}

.intro_box {
    display: flex;
    flex-direction: row;
    width: 1200px;
}

.intro_box_left {
    display: block;
    margin-right: 50px;
    width: 573px;
}

.intro_box_right {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.intro_box_right .title {
    margin-bottom: 36px;
}

.intro_box_right .intro_text_black {
    color: #000000;
    font-size: 14px;
    line-height: 28px;
    /* width: 620px; */
    margin-bottom: 0px;
}

.center_box {
    height: 470px;
}

.center_box .inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 5px;
    padding-bottom: 54px;
}

.center_box .title {
    color: #000000;
    margin-bottom: 20px;
}

.about_swiper_box {
    position: relative;
    width: 95%;
    box-sizing: border-box;
}

.swiper {
    height: 260px;
    width: 100%;
}

.next_btn,
.pre_btn {
    z-index: 2;
    position: absolute;
    top: 28%;
    width: 70px;
}

.next_btn {
    right: -30px;
}

.pre_btn {
    left: -30px;
}

.inner .swiper .swiper_img_box {
    position: relative;
    height: 200px;
    overflow: hidden;
    width: 380px;
}

.swiper_img {
    width: 380px;
}

.swiper-slide {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.swiper_text {
    color: rgba(56, 56, 56, 1);
    font-size: 14px;
    line-height: 1.5;
    width: 100%;
    text-align: center;
    margin-top: 10px;
}

.inner .swiper .swiper_img {
    position: absolute;
    left: 0px;
    width: 100%;
}

.swiper-slide-active .swiper_img {
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.1);
    mix-blend-mode: normal;
}

.about_top_box {
    height: 445px;
}

.bottom_box_us_about {
    background: url('../img/about_bottom.png') no-repeat center;
    background-size: auto;
    background-size: cover;
    height: 380px;
    position: relative;
}

.bottom_box_us_text_v {
    position: absolute;
    top: 110px;
    left: 229px;
    display: flex;
    flex-direction: column;
    font-weight: 400;
    font-size: 36px;
    color: #FFFFFF;
}

.blue_btn_v {
    position: absolute;
    top: 254px;
    left: 265px;
    width: 180px;
    height: 55px;
    background: #FFED62;
    display: flex;
    align-items: center;
    justify-content: center;
}

.arrow_icon_v {
    margin-left: 10px;
}

.about_bottom_img{
    position: absolute;
    top: 34px;
    right: 152px;
}