基于CSS3线性渐变三角图形生成实例页面

CSS代码：

.avatar {
    width: 54px; height: 54px;
    border-radius: 50%;
    object-fit: cover;
    float: left;
}
.content {
    margin-left: 70px;
}
.talk {
    display: inline-block;
    max-width: 80%;
    border: 1px solid #ddd;
    border-radius: 3px;
    padding: 6px 10px;
    font-size: 14px;
    background-color: #fff;
    position: relative;
}
.talk::before {
    content: '';
    position: absolute;
    width: 6px; height: 6px;
    background: linear-gradient(to top, #ddd, #ddd) no-repeat, linear-gradient(to right, #ddd, #ddd) no-repeat, linear-gradient(135deg, #fff, #fff 6px, hsla(0,0%,100%,0) 6px) no-repeat;
    background-size: 6px 1px, 1px 6px, 6px 6px;
    transform: rotate(-45deg);
    left: -4px; top: 13px;
}

HTML代码：

<img src="mm1.jpg" class="avatar">
<div class="content">
    <p class="talk">这是对话内容</p>
</div>