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  <title>하단 중앙 따라오는 버튼</title>
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    .floating-button {
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      background-color: #ff6400; /* 주황 배경 */
      color: white;
      padding: 15px 25px;
      border: none;
      border-radius: 50px;
      font-size: 16px;
      cursor: pointer;
      text-decoration: none;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
      z-index: 9999;
      transition: top 0.3s ease; /* 부드럽게 따라오기 */
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    .floating-button:hover {
      background-color: #d95300;
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    function updateButtonPosition() {
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      targetTop = scrollTop + windowHeight - 80; // 하단에서 80px 띄움
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2026 UND official

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