我做了一个霓虹边框https://jsfiddle.net/cf3cec6c/
body{background:black;}
h1 {
color: white;
}
.wrapper{
position: reltive;
z-index: 999;
border:1px solid red;
margin-top: 10px;
margin-bottom: 10px;
margin-right: 10px;
width: 100%;
height: 100%;
box-sizing: border-box;
border: 3px solid #0cd808;
box-shadow: 0 0 1px #b3ff51, 0 0 2px #b3ff51, 0 0 6px #b3ff51, 0 0 12px #b3ff51, inset 0 0 1px #b3ff51, inset 0 0 2px #b3ff51, inset 0 0 6px #b3ff51, inset 0 0 12px #b3ff51;
}
<div class="wrapper">
<h1> hello hello hello hello
hello hello hello hello
hello hello hello hello
hello hello hello hello
<br>
hello hello hello hello
hello hello hello hello
hello hello hello hello
hello hello hello hello
<br>
hello hello hello hello
hello hello hello hello
hello hello hello hello
hello hello hello hello
</h1>
</div>
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