body:before {
    background: url(https://images.cnblogs.com/cnblogs_com/blogs/698691/galleries/2213554/o_220905234029_1109789.png) center/cover no-repeat;
    content: '';
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.30;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    -webkit-filter: grayscale(40%);
    -moz-filter: grayscale(40%);
    -ms-filter: grayscale(40%);
    -o-filter: grayscale(40%);
    filter: grayscale(40%);
    filter: gray;
}

var time;
var normar_title=document.title;
document.addEventListener('visibilitychange', function () {
    if (document.visibilityState == 'hidden') {
         clearTimeout(time);        
         document.title = '别走啊qwq';
    } else {
        document.title = '就知道你会回来~';
        time=setTimeout(function(){ document.title = normar_title; }, 3000);

}
});

<script type="text/javascript">
	function NewDate(str) {
		str = str.split('-');
		var date = new Date();
		date.setUTCFullYear(str[0], str[1] - 1, str[2]);
		date.setUTCHours(0, 0, 0, 0);
		return date;
	}

	<script src="https://blog-static.cnblogs.com/files/zouwangblog/main.js"></script>
<script type="text/javascript"> 
$.silence({
        profile: {
            enable: true,
            avatar: '',
            favicon: 'https://files-cdn.cnblogs.com/files/zouwangblog/blog_logo.gif',
        },
        catalog: {
            enable: true,
            move: true,
            index: true,
            level1: 'h2',
            level2: 'h3',
            level3: 'h4',
        },
        signature: {
            enable: true,
            home: 'https://www.cnblogs.com/czy_blogs/',
            license: 'CC BY 4.0',
            link: 'https://creativecommons.org/licenses/by/4.0'
        },
        sponsor: {
            enable: false,
            paypal: null,
            wechat: 'https://www.cnblogs.com/images/cnblogs_com/zouwangblog/1477590/t_%e5%be%ae%e4%bf%a1%e5%9b%be%e7%89%87_20190704175553.png',
            alipay: 'https://www.cnblogs.com/images/cnblogs_com/zouwangblog/1477590/t_%e5%be%ae%e4%bf%a1%e5%9b%be%e7%89%87_20190704174158.png'
        },
        github: {
            enable: false,
            color: '#fff',
            fill: '#FF85B8',
            link: ''
        },
	topImg: {
  	homeTopImg: [https://img2020.cnblogs.com/blog/2489807/202108/2489807-20210809151901630-1846546965.jpg

				]
	},
  topInfo: {
				title: 'This is Egg tea!',
                    text: 'You got to put the past behind you before you can move on.',
				github: "https://github.com/Zou-Wang",
				telegram: "",
				music: "https://music.163.com/#/user/home?id=436757779",
				mail: "https://mail.qq.com/cgi-bin/qm_share?t=qm_mailme&email=KlBFX11LRE0SGBlqW1sESUVH",
			}
  });",
			}
  });