* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft Yahei", sans-serif;
}
body {
  background: #f5f7fa;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}
.container {
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 2px 15px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 450px;
}
h2 {
  text-align: center;
  margin-bottom: 25px;
  color: #333;
}
.form-item {
  margin-bottom: 18px;
}
label {
  display: block;
  margin-bottom: 6px;
  color: #555;
}
input, select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
}
.btn {
  width: 100%;
  padding: 12px;
  background: #1677ff;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
  margin-top: 10px;
}
.btn:hover {
  background: #0958d9;
}
.tip-btn {
  margin-top: 15px;
  background: #67c23a;
}
.err-tip {
  color: #f56c6c;
  font-size: 12px;
  margin-top: 4px;
  display: none;
}
.info-box {
  font-size: 12px;
  color: #666;
  margin: 15px 0;
  padding: 10px;
  background: #f9f9f9;
  border-radius: 6px;
}