html

<!doctype html>
<html>
<head>	
    <meta charset="utf-8">
    <meta name="description" content="">
    <meta name="keywords" content="">
    <meta name="author" content="Pragmatic Mates s.r.o. - http://pragmaticmates.com">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <link href="http://fonts.googleapis.com/css?family=Raleway:400,700" rel="stylesheet" type="text/css">
    <link rel="stylesheet" type="text/css" href="https://code.5g-o.com/wp-content/uploads/2020/06/bootstrap.min_.css">
    <link rel="stylesheet" type="text/css" href="https://code.5g-o.com/wp-content/uploads/2020/06/demo.css">

  <title>jQuery Final Countdown Plugin</title>
</head>

<body>

<div class="countdown countdown-container container"
     data-start="1362139200"
     data-end="1388461320"
     data-now="1387461319"
     data-border-color="rgba(255, 255, 255, .8)">
    <div class="clock row">
        <div class="clock-item clock-days countdown-time-value col-sm-6 col-md-3">
            <div class="wrap">
                <div class="inner">
                    <div id="canvas-days" class="clock-canvas"></div>

                    <div class="text">
                        <p class="val">0</p>
                        <p class="type-days type-time">DAYS</p>
                    </div><!-- /.text -->
                </div><!-- /.inner -->
            </div><!-- /.wrap -->
        </div><!-- /.clock-item -->

        <div class="clock-item clock-hours countdown-time-value col-sm-6 col-md-3">
            <div class="wrap">
                <div class="inner">
                    <div id="canvas-hours" class="clock-canvas"></div>

                    <div class="text">
                        <p class="val">0</p>
                        <p class="type-hours type-time">HOURS</p>
                    </div><!-- /.text -->
                </div><!-- /.inner -->
            </div><!-- /.wrap -->
        </div><!-- /.clock-item -->

        <div class="clock-item clock-minutes countdown-time-value col-sm-6 col-md-3">
            <div class="wrap">
                <div class="inner">
                    <div id="canvas-minutes" class="clock-canvas"></div>

                    <div class="text">
                        <p class="val">0</p>
                        <p class="type-minutes type-time">MINUTES</p>
                    </div><!-- /.text -->
                </div><!-- /.inner -->
            </div><!-- /.wrap -->
        </div><!-- /.clock-item -->

        <div class="clock-item clock-seconds countdown-time-value col-sm-6 col-md-3">
            <div class="wrap">
                <div class="inner">
                    <div id="canvas-seconds" class="clock-canvas"></div>

                    <div class="text">
                        <p class="val">0</p>
                        <p class="type-seconds type-time">SECONDS</p>
                    </div><!-- /.text -->
                </div><!-- /.inner -->
            </div><!-- /.wrap -->
        </div><!-- /.clock-item -->
    </div><!-- /.clock -->
</div><!-- /.countdown-wrapper -->



<script type="text/javascript" src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="https://code.5g-o.com/wp-content/uploads/2020/06/kinetic.js"></script>
<script type="text/javascript" src="https://code.5g-o.com/wp-content/uploads/2020/06/jquery.final-countdown.js"></script>
<script type="text/javascript">
  $('.countdown').final_countdown();
</script>

</body>
</html>

css

html, body {
  height: 100%;
}

html {
  background-image: url('https://code.5g-o.com/wp-content/uploads/2020/06/sample.jpg');
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;	
}

body {
  background-color: rgba(44,62,80 , 0.6 );
  background-image: url('https://code.5g-o.com/wp-content/uploads/2020/06/pattern.png');
  background-position: center;
  background-repeat: repeat;
  font-family: 'Raleway', 'Arial', sans-serif;
}

.countdown-container {
  position: relative;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  transform: translateY(-50%);

}

.clock-item .inner {
  height: 0px;
  padding-bottom: 100%;
  position: relative;	
  width: 100%;
}

.clock-canvas {
  background-color: rgba(255, 255, 255, .1);
  border-radius: 50%;
  height: 0px;
  padding-bottom: 100%;
}

.text {
  color: #fff;	
  font-size: 30px;
  font-weight: bold;	
  margin-top: -50px;
  position: absolute;
  top: 50%;
  text-align: center;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 1);
  width: 100%;
}

.text .val {
  font-size: 50px;
}

.text .type-time {
  font-size: 20px;
}

@media (min-width: 768px) and (max-width: 991px) {
  .clock-item {
    margin-bottom: 30px;		
  }
}

@media (max-width: 767px) {
  .clock-item {
    margin: 0px 30px 30px 30px;
  }
}

在线演示

让链接同时具备两种打开方式