body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.container {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #323b55;
  /* background: url(../rain/images/3_Jewel_4k.jpg) fixed no-repeat;*/
  background-size: cover;
}

.login-form {
  width: 240px;
  height: 220px;
  display: flex;
  /* flex-direction 属性规定灵活项目的方向。  列 */
  flex-direction: column;
  padding: 40px;
  text-align: center;
  position: relative;
  background: inherit;
  z-index: 100;
  /* 继承父亲的属性  背景继承 */
  border-radius: 18px;
  overflow: hidden;
}

.login-form::before {
  content: '';
  width: calc(100% + 20px);
  height: calc(100% + 20px);
  background: inherit;
  box-shadow: inset 0 0 0 200px rgba(255, 255, 255, 0.25);
  position: absolute;
  top: -10px;
  left: -10px;
  z-index: -1;
  /* 滤镜 */
  filter: blur(104px);
  overflow: hidden;
}

.login-form h2 {
  font-size: 18px;
  font-weight: 400;
  color: #253152;
}

.login-form input,
.login-form button {
  margin: 6px 0;
  height: 36px;
  border: none;
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  padding: 0 14px;
  color: #253152;
}

.login-form input::placeholder {
  color: #253152;
}

.login-form button {
  margin-top: 24px;
  background-color: rgba(58, 69, 90, 0.4);
  color: white;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: 0.4s;
}

.login-form button:hover {
  background-color: rgba(25, 35, 54, 0.67);
}

.login-form button::before,
.login-form button::after {
  content: '';
  display: block;
  width: 80px;
  height: 100%;
  background: rgba(230, 232, 238, 0.67);
  opacity: 0.5;
  position: absolute;
  left: 0;
  top: 0;
  transform: skewX(-15deg);
  filter: blur(30px);
  overflow: hidden;
  transform: translateX(-100px);
}

.login-form button::after {
  width: 40px;
  background-color: rgba(230, 232, 238, 0.67);
  left: 60px;
  filter: blur(5px);
  opacity: 0;
}

.login-form button:hover::before {
  transition: 1s;
  transform: translateX(320px);
  opacity: 0.7;
}

.login-form button:hover::after {
  transition: 1s;
  transform: translateX(320px);
  opacity: 1;
}