.center_box {
    height: 438px;
    padding-top: 40px;
}

.center_box .inner {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.img_list {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
}

.img_box .intro_text_black {
    text-align: center;
}

.app_img {
    width: 380px;
}

.core {
    background-color: #F0F0F0;
    box-sizing: border-box;
    padding-top: 40px;
    padding-bottom: 48px;
    height: 500px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card_list {
    box-sizing: border-box;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.card {
    background: #FFFFFF;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
    color: #383838;
    font-size: 14px;
    height: 310px;
    margin-right: 27px;
    padding: 11px 20px 27px 20px;
    width: 280px;
    flex: none;
}

.card_top {
    border-bottom: 1px solid rgba(229, 229, 229, 1);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 54px;
    width: 100%;
}

.card_center {
    margin-top: 18px;
    margin-bottom: 20px;
    width: 100%;
    box-sizing: border-box;
    height: 77px;
}

.point {
    display: flex;
    margin-bottom: 20px;
    height: 20px;
    align-items: center;
}

.correct_icon {
    margin-right: 10px;
    width: 20px;
}

.case {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 522px;
    padding-top: 30px;
    width: 100%;
}

.case .title {
    margin-bottom: 53px;
}

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

.intro_box_left {
    display: block;
    margin-right: 50px;
    width: 600px;
}

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

.intro_box_right .title {
    margin-bottom: 40px;
}

.intro_box_right .intro_text_black {
    margin-bottom: 10px;
}