HTML
    <div class="butFrame" onclick="window.location='#'">
      
      <div class="butTextWrap">
       
          <div class="butText">Sub Heading</div>
         
      </div>
    </div>
 CSS
 /* FOR CODEPEN PRESENTATION ONLY */

body {font-family: 'open sans'; max-width: 1200px; margin: 60px auto;} .buttons {display: -webkit-flex; display: -ms-flexbox; display: flex; -webkit-align-items: flex-start; -ms-flex-align: start; align-items: flex-start;}

/* PASTE BELOW IN CSS */

.buttons * {
  transition: all .5s ease;
}

.buttons {
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

/* .butWrap {
  position: relative;
  list-style: none;
  text-align: center;
  display: -webkit-flex;
  display: -ms-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-flex-wrap: wrap;  
  -ms-flex-wrap: wrap;  
  flex-wrap: wrap;
  -webkit-align-content: flex-end;
  -ms-align-content: end;
  align-content: flex-end;
  width: 100%;
} */

/* Common style */

.butFrame {
  position: relative;
  overflow: hidden;
  margin: 5px;
  width: 24%;
  background: #111;
  font-family: inherit;
  font-size: 1em;
  text-align: center;
  cursor: pointer;
}

.butFrame .butTextWrap {
  font-family: inherit;
  padding: 2em;
  color: #fff;
  text-transform: uppercase;
  font-size: 1.25em;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.butFrame .butTextWrap::before,
.butFrame .butTextWrap::after {
  pointer-events: none;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}
}

.butFrame .butTextWrap,
.butFrame .butTextWrap > a {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Anchor will cover the whole item by default */

.butFrame .butTextWrap > a {
  z-index: 1000;
  text-indent: 200%;
  white-space: nowrap;
  font-size: 0;
  opacity: 0;
}


.butFrame .butText {
  font-weight: 300;
}

.butFrame {
  margin: 0;
  color: #fff;
}

/* EFFECT */



.butFrame .butTextWrap::before,
.butFrame .butTextWrap::after {
  position: absolute;
  top: 10px;
  right: 10px;
  bottom: 10px;
  left: 10px;
  content: '';
  opacity: 0;
  -webkit-transition: opacity 0.35s, -webkit-transform 0.35s;
  transition: opacity 0.35s, transform 0.35s;
}
.butFrame .butTextWrap::before {
  border-top: 1px solid #fff;
  border-bottom: 1px solid #fff;
  -webkit-transform: scale(0, 1);
  transform: scale(0, 1);
}
.butFrame .butTextWrap::after {
  border-right: 1px solid #fff;
  border-left: 1px solid #fff;
  -webkit-transform: scale(1, 0);
  transform: scale(1, 0);
  box-sizing: border-box;
}


/* HOVER STYLES */



.butFrame:hover .butTextWrap::before,
.butFrame:hover .butTextWrap::after {
  opacity: 1;
  -webkit-transform: scale(1);
  transform: scale(1);
}


/* MEDIA QUERIES */

@media all and (max-width: 950px) and (min-width: 701px){

  .butFrame {
    display:block;
    width:47%;
  }

}

@media all and (max-width: 700px) and (min-width: 0px){

  .butFrame {
    display:block;
    width:100%;
  }

}
https://codepen.io/NetWorkRoom/pen/qLePqX

cho nút ở đây
<div class="btn-proloop view-all butFrame" onclick="window.location='#'">
      
      <div class="butTextWrap">
       
          <div class="butText">CHI TIẾT</div>
         
      </div>
    </div>
CSS
/*hiệu ứng nút*/
.butFrame {
  position: relative;
  overflow: hidden;
  margin: 5px;
  width: 24%;
  background: #111;
  font-family: inherit;
  font-size: 1em;
  text-align: center;
  cursor: pointer;
}

.butFrame .butTextWrap {
  font-family: inherit;
  padding: 0em;
  color: #fff;
  text-transform: uppercase;
  font-size: 1.25em;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.butFrame .butTextWrap::before,
.butFrame .butTextWrap::after {
  pointer-events: none;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}
}

.butFrame .butTextWrap,
.butFrame .butTextWrap > a {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Anchor will cover the whole item by default */

.butFrame .butTextWrap > a {
  z-index: 1000;
  text-indent: 200%;
  white-space: nowrap;
  font-size: 0;
  opacity: 0;
}


.butFrame .butText {
  font-weight: 300;
}

.butFrame {
  margin: 0;
  color: #fff;
}

/* EFFECT */



.butFrame .butTextWrap::before,
.butFrame .butTextWrap::after {
  position: absolute;
  top: 4px;
  right: 5px;
  bottom: 4px;
  left: 5px;
  content: '';
  opacity: 0;
  -webkit-transition: opacity 0.35s, -webkit-transform 0.35s;
  transition: opacity 0.35s, transform 0.35s;
}
.butFrame .butTextWrap::before {
  border-top: 1px solid #fff;
  border-bottom: 1px solid #fff;
  -webkit-transform: scale(0, 1);
  transform: scale(0, 1);
}
.butFrame .butTextWrap::after {
  border-right: 1px solid #fff;
  border-left: 1px solid #fff;
  -webkit-transform: scale(1, 0);
  transform: scale(1, 0);
  box-sizing: border-box;
}


/* HOVER STYLES */



.butFrame:hover .butTextWrap::before,
.butFrame:hover .butTextWrap::after {
  opacity: 1;
  -webkit-transform: scale(1);
  transform: scale(1);
}


/* MEDIA QUERIES */

@media all and (max-width: 950px) and (min-width: 701px){

  .butFrame {
    display:block;
    width:47%;
  }

}

@media all and (max-width: 700px) and (min-width: 0px){

  .butFrame {
    display:block;
    width:100%;
  }

}