SOURCE

<!-- 封面 -->
    <div class="header">
        <h1>朋友圈demo</h1>
        <div class="header-user">
            <p>CalDey</p>
            <a href="https://www.caldey-blog.top">
                <img src="https://gitee.com/caldey/BlogImage/raw/master/img/avatar.jpg" alt="">
            </a>

        </div>
    </div>
    <!-- main-box -->
    <div class="main">
        <ol>
            <li class="item">
                <a href="#" class="avatar"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/matthew.png" alt=""></a>
                <div class="content">
                    <p>Mike123</p>
                    <p>九宫格图片test</p>
                    <ul>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/nutcracker-5767159_1920.jpg" alt=""></a>
                        </li>
                    </ul>
                    <div class="timestamp">
                        <p>2小时前</p>
                        <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/star.png" alt=""></a>
                    </div>
                    <div class="comments">
                        <p class="zan"><a href="#">Carrie</a></p>
                        <p><a href="#">Carrie</a>: 点赞了</p>
                    </div>
                </div>
            </li>
            <li class="item">
                <a href="#" class="avatar"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/rachel.png" alt=""></a>
                <div class="content">
                    <p>Rachel</p>
                    <p>转发</p>
                    <div class="zhuanfa">
                        <a href="#">
                            <img src="https://gitee.com/caldey/BlogImage/raw/master/img/polar-lights-5858656_1920.jpg" alt="">
                            <p>早安，打工人</p>
                        </a>
                    </div>
                    <div class="timestamp">
                        <p>3小时前</p>
                        <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/star.png" alt=""></a>
                    </div>
                </div>
            </li>
            <li class="item">
                <a href="#" class="avatar"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/mark.png" alt=""></a>
                <div class="content">
                    <p>小劉同学</p>
                    <p>这几天自学了HTML和CSS，可以自己做网站了，开心~</p>
                    <ul>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/laptop-5842509_1920.jpg" alt=""></a>
                        </li>
                    </ul>
                    <div class="timestamp">
                        <p>三小时前</p>
                        <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/star.png" alt=""></a>
                    </div>
                    <div class="comments">
                        <p class="zan"><a href="#">LuLu</a></p>
                        <p><a href="#">Carrie</a>： 厉害了!有空教教我</p>
                    </div>
                </div>
            </li>
            <li class="item">
                <a href="#" class="avatar"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/avatar.jpg" alt=""></a>
                <div class="content">
                    <p>CalDey</p>
                    <p>如果觉得不错就关注我和我一起学习前端吧，使用微信扫描下面的二维码即可关注</p>
                    <ul>
                        <li>
                            <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/my_wechat.jpg" alt=""></a>
                        </li>
                    </ul>
                    <div class="timestamp">
                        <p>一天前</p>
                        <a href="#"><img src="https://gitee.com/caldey/BlogImage/raw/master/img/star.png" alt=""></a>
                    </div>
                    <div class="comments">
                        <p class="zan">
                            <a href="#">Carrie</a>,
                            <a href="#">Mike123</a>,
                            <a href="#">小劉同学</a>
                        </p>
                        <p><a href="#">我</a>：如果喜欢的话，麻烦点个赞</p>
                        <p><a href="#">Carrie</a>：关注了！！！</p>
                        <p><a href="#">小劉同学</a>回复<a href="#">我</a>：支持一下</p>
                    </div>
                </div>
            </li>
        </ol>
    </div>

* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
}

ul {
    list-style: none;
}

body {
    font: 17px/24px "PingFangSC-Regular";
    background-color: #fff;
    min-width: 320px;
    max-width: 414px;
    margin: 0 auto;
}

.header {
    width: 100%;
    height: 319px;
    background: url('https://gitee.com/caldey/BlogImage/raw/master/img/concert-3084876_1920.jpg') no-repeat center;
    background-size: cover;
    position: relative;
}

.header>h1 {
    height: 100%;
    line-height: 319px;
    text-align: center;
    color: #fff;
    font-size: 44px;
    font-style: italic;
}

.header-user {
    position: absolute;
    right: 12px;
    bottom: -20px;
    display: flex;
    justify-content: right;
}

.header-user>p {
    color: #fff;
    margin-top: 16px;
    margin-right: 20px;
    font-weight: bold;
}

.header-user>a>img {
    width: 72px;
    height: 72px;
    border-radius: 6px;
    background: #4e92ef;
}

.main>ol {
    padding-top: 60px;
}

.main .item {
    padding: 10px;
    display: flex;
    border-bottom: 1px solid #EBEBEC;
}

.item .avatar>img {
    display: inline-block;
    width: 44px;
    height: 44px;
    border-radius: 4px;
    background: #2c5948;
}

.item .content {
    width: 100%;
    margin-left: 10px;
}

.item .content>p:first-child {
    /* margin-top: 5px; */
    margin-bottom: 10px;
    font-size: 17px;
    color: #4D638F;
}

.item .content>ul {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    align-content: space-between;
    margin: 10px 0;
}

.item .content>ul>li {
    width: 80px;
    height: 80px;
}

.item .content>ul>li>a>img {
    display: inline-block;
    background: brown;
    width: 100%;
    height: 100%;
}

.content .timestamp {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
}

.content .timestamp>p {
    font-size: 14px;
    color: #b7b7b7;
}

.content .timestamp>a>img {
    width: 29px;
    vertical-align: middle;
}

.content .comments {
    background: #F3F3F5;
    border-radius: 2px;
}

.comments p {
    font-size: 15px;
    color: #000;
    padding: 5px;
}

.comments .zan a:nth-child(1):before {
    content: '';
    display: inline-block;
    width: 11px;
    height: 10px;
    margin-right: 8px;
    background: url('https://gitee.com/caldey/BlogImage/raw/master/img/star_small.png') no-repeat center;
    background-size: cover;
    vertical-align: middle;
}


/* 相邻兄弟 */

.comments p+p {
    border-top: 1px solid #EBEBEC;
}

.comments p a {
    color: #536892;
}


/* 第一条 */

.item:nth-child(1) .content>ul {
    width: 250px;
    height: 250px;
}


/* 第二条 */

.item:nth-child(2) .zhuanfa {
    background-color: #F3F3F5;
    padding: 4px;
    margin: 10px 0;
}

.item:nth-child(2) .zhuanfa>a {
    display: flex;
    justify-content: left;
    align-items: center;
}

.item:nth-child(2) .zhuanfa>a>img {
    width: 42px;
    height: 42px;
    display: inline-block;
    background: #6f989e;
}

.item:nth-child(2) .zhuanfa>a>p {
    font-size: 15px;
    color: #121212;
    margin-left: 10px;
}

.item:nth-child(3) .content>ul>li {
    width: 260px;
    height: 162px;
}


/* 第四条 */

.item:nth-child(4) .content>ul>li {
    width: 174px;
    height: 174px;
}

.item:nth-child(4) .content>ul>li>a>img {
    /* x偏移量 | y偏移量 | 阴影模糊半径 | 阴影扩散半径 | 阴影颜色 */
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.50);
}