%);
	position: sticky; top: 2em;}
.scrollbox ol {list-style: none; margin: 0; padding: 0;}
.scrollbox ol li {border: 1px solid #DDD; border-width: 1px 0;
	padding: 0.4em 0.25em 0.3em; margin-bottom: -1px;
	white-space: nowrap;}

.container {position: relative; margin: 0 1em;}
.rect {position: absolute; z-index: 10; top: 2em; left: 0; height: 12.2em; width: 17.2em;
	box-sizing: border-box;
	border: 2px dashed red;}
</style>
</head>
<body>


<div class="container">

<div class="rect"></div>
<div class="scroll