记录一下15周年的录播

实现步骤：

1. 在自定义css中添加如下内容：

/*视频挂载*/
.iframe_video {
    position: relative;
    width: 100%;
}

@media only screen and (max-width: 767px) {
    .iframe_video {
        height: 15em;
    }
}

@media only screen and (min-width: 768px) and (max-width: 991px) {
    .iframe_video {
        height: 20em;
    }
}

@media only screen and (min-width: 992px) and (max-width: 1199px) {
    .iframe_video {
        height: 30em;
    }
}

@media only screen and (min-width: 1200px) {
    .iframe_video {
        height: 40em;
    }
}

.iframe_cross {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 75%
}

.iframe_cross iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0
}

2. 插入代码（直接在编辑器中）：

<iframe style="min-width: 720px;min-height: 480px" src="https://www.acfun.cn/player/ac35443632" id="ACPlayer-re" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"></iframe>