!DOCTYPE html
html lang=en
head
  meta charset=UTF-8
  meta name=viewport content=width=device-width, initial-scale=1.0
  titleYour Page Titletitle
  style
, after, before {
  -webkit-box-sizing border-box;
          box-sizing border-box;
}

html {
  background #000;
  font-family Arial, Helvetica Neue, Helvetica, sans-serif;
}

head {
  display block;
  position relative;
  width 200px;
  margin 10% auto 0;
  -webkit-animation shvr .2s infinite;
          animation shvr .2s infinite;
}

headafter {
  content '';
  width 20px;
  height 20px;
  background #000;
  position absolute;
  top 30px;
  left 25px;
  -webkit-border-radius 50%;
          border-radius 50%;
  -webkit-box-shadow 125px 0 0 #000;
          box-shadow 125px 0 0 #000;
  -webkit-animation eye 2.5s infinite;
          animation eye 2.5s infinite;
}

meta {
  position relative;
  display inline-block;
  background #fff;
  width 75px;
  height 80px;
  -webkit-border-radius 50% 50% 50% 50%  45px 45px 45% 45%;
          border-radius 50% 50% 50% 50%  45px 45px 45% 45%;
  -webkit-transform rotate(45deg);
          transform rotate(45deg);
}

metaafter {
  content '';
  position absolute;
  border-bottom 2px solid #fff;
  width 70px;
  height 50px;
  left 0px;
  bottom -10px;
  -webkit-border-radius 50%;
          border-radius 50%;
}

metabefore {
  bottom auto;
  top -100px;
  -webkit-transform rotate(45deg);
          transform rotate(45deg);
  left 0;
}

metanth-of-type(2) {
  float right;
  -webkit-transform rotate(-45deg);
          transform rotate(-45deg);
}
metanth-of-type(2)after {
  left 5px;
}

metanth-of-type(3) {
  display none;
}

body {
  margin-top 100px;
  text-align center;
  color #fff;
}

bodybefore {
  content '404';
  font-size 80px;
  font-weight 800;
  display block;
  margin-bottom 10px;
}

bodyafter {
  content 'Got lost How.....  why.....  Ahhhh....';
  color #1EA7AB;
  width 120px;
  font-size 30px;
  overflow hidden;
  display inline-block;
  white-space nowrap;
  -webkit-animation text-show 2s infinite steps(3);
          animation text-show 2s infinite steps(3);
}

@-webkit-keyframes eye {
  0%, 30%, 55%, 90%, 100% {
    -webkit-transform translate(0, 0);
            transform translate(0, 0);
  }
  10%, 25% {
    -webkit-transform translate(0, 20px);
            transform translate(0, 20px);
  }
  65% {
    -webkit-transform translate(-20px, 0);
            transform translate(-20px, 0);
  }
  80% {
    -webkit-transform translate(20px, 0);
            transform translate(20px, 0);
  }
}

@keyframes eye {
  0%, 30%, 55%, 90%, 100% {
    -webkit-transform translate(0, 0);
            transform translate(0, 0);
  }
  10%, 25% {
    -webkit-transform translate(0, 20px);
            transform translate(0, 20px);
  }
  65% {
    -webkit-transform translate(-20px, 0);
            transform translate(-20px, 0);
  }
  80% {
    -webkit-transform translate(20px, 0);
            transform translate(20px, 0);
  }
}

@-webkit-keyframes shvr {
  0% {
    -webkit-transform translate(1px);
            transform translate(1px);
  }
  50% {
    -webkit-transform translate(0);
            transform translate(0);
  }
  100% {
    -webkit-transform translate(-1px);
            transform translate(-1px);
  }
}

@keyframes shvr {
  0% {
    -webkit-transform translate(1px);
            transform translate(1px);
  }
  50% {
    -webkit-transform translate(0);
            transform translate(0);
  }
  100% {
    -webkit-transform translate(-1px);
            transform translate(-1px);
  }
}

@-webkit-keyframes text-show {
  to {
    text-indent -373px;
  }
}

@keyframes text-show {
  to {
    text-indent -373px;
  }
}

  style
head
body
  !-- 在这里可以添加页面内容 --
  script
     创建一个覆盖层
    var overlay = document.createElement('div');
    overlay.style.position = 'fixed';
    overlay.style.top = '0';
    overlay.style.left = '0';
    overlay.style.width = '100%';
    overlay.style.height = '100%';
    overlay.style.backgroundColor = 'rgba(0, 0, 0, 0.5)';
    overlay.style.display = 'flex';
    overlay.style.justifyContent = 'center';
    overlay.style.alignItems = 'center';
    overlay.style.zIndex = '1000';
    overlay.style.visibility = 'hidden';  初始隐藏
    document.body.appendChild(overlay);

     创建确认框
    var dialogBox = document.createElement('div');
    dialogBox.style.backgroundColor = 'white';
    dialogBox.style.padding = '20px';
    dialogBox.style.borderRadius = '5px';
    dialogBox.style.boxShadow = '0 0 10px rgba(0, 0, 0, 0.3)';
    dialogBox.style.textAlign = 'center';
    dialogBox.style.maxWidth = '80%';
    overlay.appendChild(dialogBox);

     创建提示文本
    var message = document.createElement('p');
    message.textContent = '正在返回首页，点击确定继续。';
    message.style.color = 'blue';  设置文本颜色为黄色
    dialogBox.appendChild(message);

     创建确定按钮
    var confirmBtn = document.createElement('button');
    confirmBtn.textContent = '确定';
    confirmBtn.style.padding = '10px 20px';
    confirmBtn.style.margin = '10px';
    confirmBtn.style.cursor = 'pointer';
    confirmBtn.style.backgroundColor = '#007bff';
    confirmBtn.style.color = 'white';
    confirmBtn.style.border = 'none';
    confirmBtn.style.borderRadius = '3px';
    confirmBtn.style.fontSize = '16px';
    dialogBox.appendChild(confirmBtn);

     设置定时器，在10秒后显示确认框
    setTimeout(function() {
        overlay.style.visibility = 'visible';  显示覆盖层
    }, 10000);

     点击确定按钮后的操作
    confirmBtn.addEventListener('click', function() {
        var targetUrl = httpsexample.com;  替换为您要跳转的链接
        window.location.href = targetUrl;
    });
script

body
html