.about {
    width: 100%;
    margin: 0 auto;
    padding-bottom: 1.2rem;
}

.banner {
    width: 100%;
    height: 4.5rem;
    position: relative;
}

.banners {
    width: 100%;
    height: 4.5rem;
}

.banners img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-title {
    position: absolute;
    top: 1.52rem;
    left: 7.85rem;
}

.title-p1 {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: bold;
    font-size: .48rem;
    color: #FFFFFF;
    text-align: center;
    font-style: normal;
    text-transform: none;
}

.title-p2 {
    padding-top: .23rem;
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .24rem;
    color: #FFFFFF;
    text-align: center;
    font-style: normal;
    text-transform: none;
}


.tab-button {
    width: 14rem;
    margin: 0 auto;
    border-bottom: 0.01rem solid #DDDDDD;
    height: .9rem;
    display: flex;
    align-items: flex-start;
    /* margin-top: .28rem; */
    column-gap: .15rem;
}

.tab-button button {
    margin: 0;
    margin-top: .21rem;
    border: 0;
    background: #f4f4f4;
    border-radius: 0rem 0rem 0rem 0rem;
    transition: background-color .5s ease-in-out;
}

.tab-button button a {
    padding: .15rem .28rem;
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .16rem;
    color: #222222;
    text-align: center;
    font-style: normal;
    text-transform: none;
}

.tab-button button:hover {
    background-color: #3473BF;
}

.tab-button button:hover a {
    color: #fff;
}

.about-active {
    background-color: #3473BF !important;
}

.about-active a {
    color: #fff !important;
}

.cooperate {
    margin: 0 auto;
    width: 14rem;
    display: flex;
    justify-content: center;
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: bold;
    font-size: .36rem;
    color: #222222;
    text-align: center;
    font-style: normal;
    text-transform: none;
    padding-top: .8rem;
    padding-bottom: .4rem;
}






.engineerings1-title {
    width: 1.26rem;
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: 0.18rem;
    color: #222222;
    text-align: left;
    font-style: normal;
    text-transform: none;
    white-space: nowrap;/* 防止文本换行 */
    overflow: hidden;/* 隐藏超出部分的文本 */
    text-overflow: ellipsis;
}


.engineering {
    width: 14rem;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    /* justify-content: space-between; */
    row-gap: .5rem;
    column-gap: .28rem;
}

.engineering-img {
    width: 4.48rem;
    height: 2.6rem;
    position: relative;
    transition: height 0.3s ease-in-out 0.2s;
}

.engineering-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.engineerings1 {
    padding: .18rem .2rem;
    background: #F5F5F5;
    border-radius: 0rem 0rem 0rem 0rem;
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .18rem;
    color: #222222;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-top: .1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: margin-top 0.3s ease-in-out 0.2s;
}

.engineerings1-img {
    width: .26rem;
    height: .12rem;
    visibility: hidden;
    transition: visibility 0.3s ease-in-out 0.2s;
}

.engineerings1-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.engineering-bg {
    width: 4.48rem;
    height: 2.80rem;
    background: #000000;
    border-radius: 0;
    opacity: 0;
    position: absolute;
    top: 0;
    text-align: center;
    align-content: center;
    /* display: none; */
    transition: opacity 0.3s ease-in-out 0.2s;
}

.engineering-bg p {
    color: #fff;
    font-size: .3rem;
}

.engineerings:hover .engineering-img {
    height: 2.8rem;
    /* transition: height 0.3s ease-in-out 0.2s; */
    /* 这里添加了延时，height属性变化会在0.2s后开始，总过渡时间0.3s，缓动效果为ease-in-out */
}

.engineerings:hover .engineerings1 {
    margin-top: 0;
    /* transition: margin-top 0.3s ease-in-out 0.2s; */
}

.engineerings:hover .engineerings1-img {
    visibility: visible;
    /* transition: visibility 0.3s ease-in-out 0.2s; */
    /* 注意：visibility属性在过渡时可能效果不太完美，因为它只有visible和hidden两个离散值，可能会有闪烁感，可根据实际情况考虑使用opacity代替来实现淡入淡出效果 */
}

.engineerings:hover .engineering-bg {
    opacity: 0.5;
    /* transition: opacity 0.3s ease-in-out 0.2s; */
}

.engineerings {
    transition: transform 0.3s ease-in-out 0.2s;
}

.engineerings:hover {
    transform: translateY(-0.1rem);
}


.pages {
    padding-top: .6rem;
    margin: 0 auto;
    width: 14rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-1 {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .14rem;
    color: #7D7D7D;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-right: .12rem;
}

.page-2,
.page-7 {
    align-content: center;
    justify-items: center;
    width: .32rem;
    height: .32rem;
    border: #dedede 0.01rem solid;
    border-radius: 0.02rem;
    margin-left: .08rem;
}

.page-3 {
    align-content: center;
    justify-items: center;
    width: .32rem;
    height: .32rem;
    border: #dedede 0.01rem solid;
    border-radius: 0.02rem;
    margin-left: .08rem;
}

.page-3 a {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .14rem;
    color: #7D7D7D;
    text-align: center;
    font-style: normal;
    text-transform: none;
    width: 100%;
    height: 100%;
    display: block;
    align-content: center;
}

.page-6 {
    margin-left: .2rem;
    align-content: center;
    justify-items: center;
    width: .72rem;
    height: .32rem;
    background: #3473BF;
    border-radius: .02rem .02rem .02rem .02rem;
}

.page-6 a {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .14rem;
    color: #FFFFFF;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

.page-4 {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .14rem;
    color: #7D7D7D;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-left: .08rem;
}

.page-5 {
    height: .32rem;
    display: flex;
}

.page-8 {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .14rem;
    color: #7D7D7D;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-right: .08rem;
    margin-left: .2rem;
}

.page-9 {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .14rem;
    color: #7D7D7D;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-left: .08rem;
}

.page-a {
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: .12rem;
    color: #666666;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

select {
    font-size: .12rem !important;
}

.pages-active {
    background-color: #3473BF;
}

.pages-active a {
    color: #fff !important;
}

.page-2,
.page-7 {
    cursor: pointer;
}

.page-7 a {
    width: 100%;
    height: 100%;
    display: block;
    background: url(../img/engineering/page1.png) no-repeat center center;
    background-size: .16rem .16rem;
    transform: rotate(180deg);
}

.page-7 a:hover {
    width: 100%;
    height: 100%;
    display: block;
    background: url(../img/engineering/page2.png) no-repeat center center;
    background-size: .16rem .16rem;
    transform: rotate(360deg);
}

.page-2 a {
    width: 100%;
    height: 100%;
    display: block;
    background: url(../img/engineering/page1.png) no-repeat center center;
    background-size: .16rem .16rem;
}

.page-2 a:hover {
    width: 100%;
    height: 100%;
    display: block;
    background: url(../img/engineering/page2.png) no-repeat center center;
    background-size: .16rem .16rem;
    transform: rotate(180deg);
}