.div1 {
    text-align: center;
}

.div1content {
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.div1item {
    line-height: 1;
    color: white;
    font-size: 48px;
    font-weight: bold;
    letter-spacing: 6px;
    margin-bottom: 30px;
}

.div1text {
    line-height: 2;
    color: white;
    text-align: center;
    font-size: 32px;
    letter-spacing: 3px;
    margin-top: 0px;
}

.div2 {
    text-align: center;
}

.div2content {
    z-index: 2;
    display: flex;
    flex-wrap: wrap;
}

.div2item1 {
    position: absolute;
    display: flex;
    flex-basis: 100%;
    z-index: 2;
}

.div2row {
    flex-basis: 100%;
    display: flex;
    justify-content: space-around;
}

.bigitem {
    color: rgb(233, 84, 6);
    font-weight: bold;
    font-size: 40px;
    letter-spacing: 6px;
    line-height: 1.5;
}

.div2row:nth-child(1) {
    justify-content: center;
    width: 85%;
}

.div2row:nth-child(2) {
    justify-content: space-around;
    width: 85%;
}

.div2row:nth-child(3) {
    justify-content: space-around;
    width: 85%;
}

.part1 {
    display: flex;
    flex-direction: column;
    margin-left: 8%;
    width: 95%;
}

.part3 {
    display: flex;
    flex-direction: column;
    margin-left: 8%;
    width: 95%;
}

.part2 {
    display: flex;
    flex-direction: column;
    width: 95%;
}

.part4 {
    display: flex;
    flex-direction: column;
    width: 95%;
}

.item2 {
    color: rgb(233, 84, 6);
    font-weight: bold;
    font-size: 24px;
    letter-spacing: 5px;
    margin: 8px 0px;
    text-align: left;
}

.content {
    width: 425px;
    font-size: 18px;
    line-height: 1.5;
    letter-spacing: 2px;
    margin: 8px 0px;
    height: 75%;
    text-align: left;
}

.fourhr {
    width: 164px;
    border-top: 2px solid rgb(233, 84, 6);
    margin-left: 0px;
}

.div3 {
    text-align: center;
}

.div3 :nth-child(1) {
    color: rgb(233, 84, 6);
    font-weight: bold;
    font-size: 40px;
    letter-spacing: 3px;
    line-height: 1;
}

.div3 :nth-child(2),
.div3 :nth-child(3),
.div3 :nth-child(4) {
    text-align: center;
    font-size: 18px;
    letter-spacing: 3px;
    line-height: 1;
}

.div3 img {
    margin: 30px 0px;
}

@media screen and (max-width:1200px) {
    .div1 {
        width: 100%;
    }
    .div1content {
        width: 100%;
    }
    .div2 {
        width: 100%;
    }
    .div2content {
        width: 100%;
    }
}

@media screen and (min-width: 1200px) {
    .div1 {
        width: 100%;
    }
    .div1content {
        width: 100%;
    }
    .div2 {
        width: 100%;
    }
    .div2content {
        width: 100%;
    }
    .div2row {
        padding: 0px calc((100% - 1200px) / 2);
    }
}


/* 未被访问的链接 */

.mentlist a:link {
    color: rgb(109, 117, 104);
    text-decoration: none;
}


/* 已被访问的链接 */

.mentlist a:visited {
    color: #00a4ff;
    text-decoration: none;
}

.div1content {
    background: url("https://website-1254406198.cos.ap-chengdu.myqcloud.com/webimg/pcImg/cooperate/1.png");
    background-size: cover;
    width: 100%;
    height: 100%;
}

.div2content {
    background: url("https://website-1254406198.cos.ap-chengdu.myqcloud.com/webimg/pcImg/cooperate/2.png");
    background-size: cover;
    width: 100%;
    height: 100%;
}