html {
    font-size: 625%
}

body {
    font-family: "Microsoft YaHei", sans-serif;
    font-size: 20px;
    line-height: 160%;
    color: #000
}

a {
    color: #000
}

.banner {
    width: 1200px;
    margin: 0 auto
}

.banner img {
    width: 100%
}

.topNews {
    width: 1200px;
    margin: 0 auto 90px;
    padding: 40px 30px;
    box-sizing: border-box;
    border-bottom: 1px solid #000
}

.topNews h2 {
    font-size: 36px;
    line-height: 160%;
    padding-bottom: 10px
}

.topNews .desc {
    font-family: "楷体"
}

.main {
    width: 1200px;
    margin: 0 auto 100px;
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
    justify-content: space-between;
}

.main .item {
    width: calc(50% - 20px);
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.main .item.play .video::before {
    content: none
}

.main .video {
    width: 580px;
    height: 325px;
    flex-shrink: 0;
    position: relative
}

.main .video img,
.main .video video {
    width: 580px;
    height: 325px
}

.main .video::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: 1;
    width: 70px;
    height: 70px;
    margin: -35px 0 0 -35px;
    background: url(http://art.china.cn/images/2019Art/images/bigplay.png) no-repeat 0 0;
    cursor: pointer
}

.main .txt {
    width: 100%
}

.main .txt h2 {
    font-size: 24px;
    line-height: 160%;
}

.main .txt .desc {
    display: none;
}

.footer {
    font-size: 12px
}

@media screen and (max-width: 1024px) {
    html {
        font-size: 312.5%
    }

    body {
        font-size: .34rem
    }

    .banner {
        width: 100%
    }

    .topNews {
        width: 100%;
        margin: 0 auto .6rem;
        padding: .4rem .3rem
    }

    .topNews h2 {
        font-size: .4rem;
        padding-bottom: .1rem
    }

    .main {
        width: 100%;
        margin: 0 auto .6rem;
        gap: .6rem
    }

    .main .item {
        width: 100%;
        flex-wrap: wrap;
        gap: .2rem
    }

    .main .video {
        width: 100%;
        height: auto
    }

    .main .video img,
    .main .video video {
        width: 100%;
        height: auto
    }

    .main .txt {
        box-sizing: border-box;
        padding: 0 .3rem
    }

    .main .txt h2 {
        font-size: .32rem;
    }
}