lign: center;
      width: 100%;
    }
  </style>
</head>
<body>
  <div id="clock">--:--:--</div>

  <script>
    function updateTime() {
      const now = new Date();
      const hours = String(now.getHours()).padStart(2, '0');
      const minutes = String(now.getMinutes()).padStart(2, '0');
      const seconds = String(now.getSeconds()).padStart(2, '0');
      const timeStr = `${hours}:${minutes}:${seconds}`;
      document.getElementById('clock').textContent = timeStr;
    }

    setInterval(updateTime, 