.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 1000; /* 确保在最上层 */
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: rgba(240, 244, 248, 0.521); /* 半透明浅蓝色背景 */
  padding: 30px;
  border-radius: 15px;
  width: 90%;
  max-width: 500px;
  text-align: center;
  transform: scale(0.9);
  transition: transform 0.3s ease;
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
  border: 1px solid rgba(118, 170, 255, 0.801); /* 半透明边框 */
  backdrop-filter: blur(10px); /* 模糊效果 */
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-content h2 {
  margin-top: 0;
  color: #333;
  font-size: 24px;
  font-weight: 600;
}

.modal-content p {
  margin: 20px 0;
  color: #555; /* 深灰色字体 */
  font-size: 16px;
  line-height: 1.6;
}

.modal-content p strong {
  color: #991641; /* 突出显示重要内容 */
}

.modal-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 30px;
}

.modal-button {
  padding: 12px 25px;
  border: none;
  border-radius: 25px; /* 更圆的按钮 */
  cursor: pointer;
  font-size: 16px;
  font-weight: 600; /* 字体加粗 */
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  text-transform: uppercase; /* 字母大写 */
  letter-spacing: 1px; /* 增加字母间距 */
}

.modal-button-agree {
  background: linear-gradient(45deg, #44d661, #cfffdf); /* 绿色渐变 */
  color: white;
}

.modal-button-agree:hover {
  background-color: #218838;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}

.modal-button-disagree {
  background: linear-gradient(45deg, #ff487f, #e4e8f0); /* 粉色渐变w */
  color: #ffffff;
}

.modal-button-disagree:hover {
  background-color: #c82333;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}