/* <system section="background" selected="photo-02"> */
body{ background-image: url(https://cdn.blog.st-hatena.com/images/theme/backgrounds/2014/photo-02.jpg?version=3302d0c519de548bcb3552ea0bf509); background-repeat: no-repeat; background-attachment: fixed; background-position: center top; background-size: cover; }
/* </system> */
<span class="white-text">白い文字</span>