SOURCE

<div class="post-card">
    <div class="community-header clearfix">
          <img class="avatar" src="https://static.playground.forzoom.tech/meta/square/1.jpg" />
          <div class="name-wrap">
              <div class="name active">
                  用户昵称
              </div>
              <span>3分钟前</span>
          </div>
      </div>

      <div class="community-text">这是主体内容</div>

    <!-- 底部内容 -->
    <div class="community-footer before-line">
        <div class="clearfix">
            <div class="col col-4">
                分享
            </div>
            <div class="col col-4">
                评论
            </div>
            <div class="col col-4">
                点赞
            </div>
        </div>
    </div>
</div>

* {
    padding: 0;
    margin: 0;
}
.post-card {
    position: relative;
    margin-bottom: 10px;
    background-color: #fff;
}
.post-card .community-header {
    padding: 20px 5px 0;
}
.post-card .community-header .avatar {
    float: left;
    width: 48px;
    height: 48px;
    background-color: #ddd;
    border: 1px solid #eee;
    border-radius: 50%;
}
.post-card .community-header .name-wrap {
    box-sizing: border-box;
    padding-left: 10px;
    float: left;
    height: 48px;
    max-width: 280px;
}
.post-card .community-header .name-wrap .name {
    font-size: 16px;
    line-height: 48px;
    color: #333;
    font-weight: 700;
}
.post-card .community-header .name-wrap .name.active {
    line-height: 22px;
}

.post-card .community-header .name-wrap span {
    font-size: 12px;
    height: 20px;
    line-height: 20px;
    padding-top: 2px;
    color: #999;
}

.post-card .community-text {
    padding: 10px 5px 5px;
    font-size: 14px;
    line-height: 24px;
    color: #000;
    word-break: break-all;
    word-wrap: break-word;
    white-space: pre-wrap;
}

.post-card .community-footer {
    position: relative;
    padding: 7px 0;
    font-size: 16px;
    line-height: 22px;
    color: #555;
    text-align: center;
    border-top: 1px solid #eee;
}
.post-card .community-footer .icon {
    font-size: 22px;
    vertical-align: middle;
}
.post-card .community-footer .primary-color {
    color: #0099ff;
}

.col {
    float: left;
}
.col-4 {
    width: 33%;
}

.clearfix:before,
.clearfix:after {
		content: '';
		display: table;
}
.clearfix:after {
    clear: both;
}