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console

            
<h1>CSS世界</h1>
<h1>CSS世界</h1>

            
h1:first-of-type {
    width: 180px;
    height: 36px;
    text-indent: -999px;
    background: center/contain no-repeat url("http://cdn.jsrun.top/css/img/logo@2x.png");
}
h1:nth-last-child(2) {
    width: 180px;
    height: 36px;
    content: url("http://cdn.jsrun.top/css/img/logo@2x.png");
    object-fit: contain;
}