body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: #f4f6f8;
  margin: 0;
  padding: 0;
  color: #455a64;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 25px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

h2 {
  color: #039be5;
}

.center {
  text-align: center; /* 居中对齐 */
}

form {
  margin-bottom: 25px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
}

textarea, input[type="text"], input[type="password"] {
  width: 100%;
  border: 1px solid #cfd8dc;
  border-radius: 5px;
  padding: 12px;
  box-sizing: border-box;
  font-size: 15px;
  margin-bottom: 12px;
}

input[type="submit"], .btn {
  display: inline-block;
  margin-top: 12px;
  padding: 12px 25px;
  background-color: #039be5;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 15px;
}

input[type="submit"]:hover, .btn:hover {
  background-color: #0288d1;
}

.message {
  background-color: #ffffff;
  padding: 18px;
  margin-bottom: 18px;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
  border-left: 5px solid #039be5;
}

.message strong {
  color: #039be5;
}

.message button {
  margin-right: 12px;
  background-color: #039be5;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  padding: 7px 12px;
}

.message button:hover {
  background-color: #0288d1;
}

.qr-container-wrapper {
  display: flex;
  align-items: flex-end;
  margin-top: 12px;
  position: relative;
}

.qr-container {
  display: inline-block;
  position: relative;
}

.qr-clear-button {
  position: absolute;
  bottom: 0;
  right: -150px; /* 调整这个值来控制按钮的位置 */
}

.pagination {
  text-align: center;
  margin-top: 25px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.pagination a {
  text-decoration: none;
  color: #039be5;
  padding: 10px 20px;
  margin: 0 7px;
  border: 1px solid #cfd8dc;
  border-radius: 5px;
  transition: background-color 0.3s, color 0.3s;
}

.pagination a:hover,
.pagination a.active {
  background-color: #039be5;
  color: #fff;
}

/* 手机端美化 */
@media (max-width: 600px) {
  .pagination {
    flex-direction: column;
    align-items: center;
  }

  .pagination a {
    margin: 7px 0;
    width: 85%;
  }

  .pagination a.active {
    background-color: #fff;
    color: #039be5;
    border: 1px solid #039be5;
  }

  .message {
    padding: 12px;
    margin-bottom: 12px;
  }

  .message button {
    margin-right: 7px;
    padding: 5px 10px;
    font-size: 13px;
  }

  .qr-container-wrapper {
    flex-direction: column;
    align-items: flex-start;
  }

  .qr-container {
    margin-top: 12px;
  }
}