SOURCE

<div class="cccMarkOuter orange">
	<div class="blinkPoint">
    </div>
	<div class="dashLine"></div>
	<div class="contentBox">
		<div class="contentTitle">漏电警告</div>
		<div class="contentBody">
            <div class="rightTriangle"></div>
            <div class="contentItem">
                位置：78#和79#之间，距离7898米。
            </div>
            <div class="contentItem">
                位置：78#和79#之间，距离7898米。
            </div>
        </div>
	</div>
</div>

body {
    background-color: #000;
}

.cccMarkOuter {
    padding: 30px;
    margin: 20px;
    border: 1px solid #aaa;
    width: max-content;
    max-width: 300px;
    position: relative;
}
.cccMarkOuter.red{
    --ccc-mark-color: #ff0000;
}
.cccMarkOuter.orange{
    --ccc-mark-color: orange;
}
.cccMarkOuter .contentBox {
    max-width: 100%;
    min-width: 150px;
    min-height: 60px;
}

.cccMarkOuter .contentBox .contentTitle {
    height: 20px;
    padding: 5px;
    width: max-content;
    font-size: 13px;
    font-weight: bolder;
    color: #fff;
    background-color: var(--ccc-mark-color);
    position: relative;
}

.cccMarkOuter .contentBox .contentTitle::after {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 15px;
    border-left-width: 15px;
    border-color: transparent transparent var(--ccc-mark-color) var(--ccc-mark-color);
    position: absolute;
    right: -29px;
    bottom: 0;
}

.cccMarkOuter .contentBox .contentBody {
    padding: 10px;
    background-color: #0009;
    font-size: 12px;
    color: #eee;
    border: 1px solid var(--ccc-mark-color);
    position: relative;
}

.cccMarkOuter .dashLine {
    width: 42px;
    height: 2px;
    transform: rotate(315deg);
    background-image: linear-gradient(to right, var(--ccc-mark-color) 50%, transparent 50%);
    background-size: 8px 100%;
    /* 控制虚线的宽度和间隔 */
    position: absolute;
    left: -5px;
    bottom: 15px;
}

.cccMarkOuter .blinkPoint {
    border-radius: 50%;
    width: 30px;
    height: 30px;
    position: absolute;
    left: -15px;
    bottom: -15px;
}

.cccMarkOuter .blinkPoint::after {
    content: '';
    border-radius: 50%;
    width: 12px;
    height: 12px;
    background-color: var(--ccc-mark-color);
    opacity: 1;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
}

.cccMarkOuter .blinkPoint::before {
    content: '';
    border-radius: 50%;
    width: 100%;
    height: 100%;
    background-color: var(--ccc-mark-color);
    opacity: 0.2;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
}