input 输入框设计，HTML/Vue代码在线实时编辑、预览

            
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            body {
  background: #e8e8e8;
  display:flex;
  align-items: center;
  justify-content: center;
}

.inputGroup {
  font-family: 'Segoe UI', sans-serif;
  margin: 1em 0 1em 0;
  max-width: 190px;
  position: relative;
}

.inputGroup input {
  font-size: 100%;
  padding: 0.8em;
  outline: none;
  border: 2px solid rgb(200, 200, 200);
  background-color: transparent;
  border-radius: 20px;
  width: 100%;
}

.inputGroup label {
  font-size: 100%;
  position: absolute;
  left: 0;
  padding: 0.8em;
  margin-left: 0.5em;
  pointer-events: none;
  transition: all 0.3s ease;
  color: rgb(100, 100, 100);
}

.inputGroup :is(input:focus, input:valid)~label {
  transform: translateY(-50%) scale(.9);
  margin: 0em;
  margin-left: 1.3em;
  padding: 0.4em;
  background-color: #e8e8e8;
}

.inputGroup :is(input:focus, input:valid) {
  border-color: rgb(150, 150, 200);
}