Layui弹出层分割线

    <style type="text/css">
        .wrapper {
            padding-bottom: 90px;
        }
        .divider {
            position: relative;
            margin-top: 90px;
            height: 1px;
        }
        .div-transparent:before {
            content: "";
            position: absolute;
            top: 0;
            left: 10%;
            right: 10%;
             80%;
            height: 1px;
            background-image: linear-gradient(to right, transparent, darkgrey, transparent);
        }
        .div-arrow-down:after {
            content: "";
            position: absolute;
            z-index: 1;
            top: -7px;
            left: calc(50% - 7px);
             14px;
            height: 14px;
            transform: rotate(45deg);
            background-color: white;
            border-bottom: 1px solid darkgrey;
            border-right: 1px solid darkgrey;
        }
        .div-tab-down:after {
            content: "";
            position: absolute;
            z-index: 1;
            top: 0;
            left: calc(50% - 10px);
             20px;
            height: 14px;
            background-color: white;
            border-bottom: 1px solid darkgrey;
            border-left: 1px solid darkgrey;
            border-right: 1px solid darkgrey;
            border-radius: 0 0 8px 8px;
        }
        .div-stopper:after {
            content: "";
            position: absolute;
            z-index: 1;
            top: -6px;
            left: calc(50% - 7px);
             14px;
            height: 12px;
            background-color: white;
            border-left: 1px solid darkgrey;
            border-right: 1px solid darkgrey;
        }
        .div-dot:after {
            content: "";
            position: absolute;
            z-index: 1;
            top: -9px;
            left: calc(50% - 9px);
             18px;
            height: 18px;
            background-color: goldenrod;
            border: 1px solid darkgrey;
            border-radius: 50%;
            box-shadow: inset 0 0 0 2px white, 0 0 0 4px white;
        }
    </style>

    <div class="wrapper">
        <div class="divider div-transparent"></div>
        <div class="divider div-transparent div-arrow-down"></div>
        <div class="divider div-transparent div-tab-down"></div>
        <div class="divider div-transparent div-stopper"></div>
        <div class="divider div-transparent div-dot"></div>
    </div>

效果图

参考网站