/* ============ 登录/注册共用样式 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: #f0f2f5;
  color: #333;
}
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-box {
  width: 380px;
  max-width: 100%;
  background: #fff;
  border-radius: 10px;
  padding: 36px 32px;
  box-shadow: 0 4px 18px rgba(0,0,0,.08);
}
.auth-box h1 { font-size: 22px; text-align: center; margin-bottom: 6px; }
.auth-box .sub { text-align: center; color: #999; font-size: 13px; margin-bottom: 22px; }
.auth-box label { display: block; font-size: 13px; color: #555; margin: 14px 0 6px; }
.auth-box input {
  width: 100%;
  height: 40px;
  border: 1px solid #dcdfe6;
  border-radius: 6px;
  padding: 0 12px;
  font-size: 14px;
  outline: none;
  transition: border-color .2s;
}
.auth-box input:focus { border-color: #4a6cf7; }
.btn-primary {
  width: 100%;
  height: 42px;
  margin-top: 22px;
  background: #4a6cf7;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
  transition: background .2s;
}
.btn-primary:hover { background: #3b5be0; }
.switch { text-align: center; margin-top: 18px; font-size: 13px; color: #777; }
.switch a { color: #4a6cf7; text-decoration: none; }
.alert { border-radius: 6px; padding: 10px 14px; font-size: 13px; margin-bottom: 12px; }
.alert.error { background: #fef0f0; color: #e2453c; border: 1px solid #f5c2c0; }
.alert.success { background: #f0f9eb; color: #529b2e; border: 1px solid #c2e7b0; }