Button-hover 03

HTML

<div class="container">
  <button type="text" class="btn">Hover Me</button>
</div>

CSS

body {
  margin: 0;
  padding: 0;
  background: #95a5a6;
  font-family: sans-serif;
}
.container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.btn {
  background: none;
  /* border: 1px solid #000; */
  box-shadow: 0 0 0 1px #000; /* 这里使用boxshadow替换border做为边框 */
  border: none;
  outline: none;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 16px;
  color: #fff;
  padding: 14px 36px;
  line-height: 24px;
  transition: .5s;
}
.btn:hover {
  background: #000;
  box-shadow: 0 0 25px 10px #bdc3c7;
}
.btn::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  height: 100%;
  width: 100%;
  border: 1px solid #000;
  background: transparent;
  transition: .5s;
}
.btn:hover::before {
  transform: scale(1.3, 1.5);
  opacity: 0;
  transition: .5s;
}

Demo

Description
box-shadow: 用阴影替换边框是为了不占据空间
transform: scale(1.3, 1.5);: X 1.3倍 Y 1.5 倍