body {
    font-size: 16px;
    background-color: #f5f6f9;
}

.container {
    width: 7.5rem;
    overflow: hidden;
}

.box {
    width: 7.5rem;
}


/* 返回 */

.return_img {
    width: .36rem;
    height: .38rem;
    position: fixed;
    left: .4rem;
    top: .49rem;
}


/* 头部 */

.header {
    width: 7.5rem;
    font-size: .36rem;
    height: 1.45rem;
    line-height: 1.45rem;
    text-align: center;
    color: #333333;
}


/* 主体 */

.main {
    width: 6.94rem;
    margin: 0 auto;
}


/* 各类活动公告 */

.announcement_activity {
    width: 100%;
    height: 9.22rem;
    background-color: #ffffff;
    padding: .5rem .45rem 4.6rem .45rem;
    margin-bottom: .3rem;
}

.activity_name {
    font-size: .32rem;
    color: #333333;
    margin-bottom: .45rem;
    text-align: center;
}

.activity_intro {
    font-size: .28rem;
    color: #666666;
    text-indent: .6rem;
    line-height: .45rem;
    letter-spacing: .02rem;
}