HTML & CSS Nút Gọi Nhanh

Chỉ cần copy đoạn css sau vào header.php khuyến khích các bạn sử dụng plugin : Insert header and footer

Tải [Insert Header And Footer] TẠI ĐÂY

<style>
.text-hotline{
	font-weight:bold;
	font-size:20px;
}

.text-hotlinemobile{
	font-weight:bold;
	font-size:68%
}

.hotline-phone-ring-wrap {
  position: fixed;
  top: 90%;
  left: 0;
  z-index: 999999;
}
.hotline-phone-ring {
  position: relative;
  visibility: visible;
  background-color: transparent;
  width: 110px;
  height: 110px;
  cursor: pointer;
  z-index: 11;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateZ(0);
  transition: visibility .5s;
  left: 0;
  bottom: 0;
  display: block;
}
.hotline-phone-ring-circle {
	width: 95px;
  height: 95px;
  bottom: 53px;
  left: 13px;
  position: absolute;
  background-color: transparent;
  border-radius: 100%;
  border: 2px solid #e60808;
  -webkit-animation: phonering-alo-circle-anim 1.2s infinite ease-in-out;
  animation: phonering-alo-circle-anim 1.2s infinite ease-in-out;
  transition: all .5s;
  -webkit-transform-origin: 50% 50%;
  -ms-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  opacity: 0.5;
}
.hotline-phone-ring-circle-fill {
	width: 72px;
  height: 72px;
  bottom: 64px;
  left: 25px;
  position: absolute;
  background-color: rgba(230, 8, 8, 0.7);
  border-radius: 100%;
  border: 2px solid transparent;
  -webkit-animation: phonering-alo-circle-fill-anim 2.3s infinite ease-in-out;
  animation: phonering-alo-circle-fill-anim 2.3s infinite ease-in-out;
  transition: all .5s;
  -webkit-transform-origin: 50% 50%;
  -ms-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
}
.hotline-phone-ring-img-circle {
	background-color: #e60808;
	width: 45px;
  height: 45px;
  bottom: 78px;
  left: 38px;
  position: absolute;
  background-size: 20px;
  border-radius: 100%;
  border: 2px solid transparent;
  -webkit-animation: phonering-alo-circle-img-anim 1s infinite ease-in-out;
  animation: phonering-alo-circle-img-anim 1s infinite ease-in-out;
  -webkit-transform-origin: 50% 50%;
  -ms-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hotline-phone-ring-img-circle .pps-btn-img {
	display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}
.hotline-phone-ring-img-circle .pps-btn-img img {
	width: 20px;
	height: 20px;
}
.hotline-bar {
  position: absolute;
  background: rgba(230, 8, 8, 0.75);
  height: 40px;
  width: 215px;
  line-height: 40px;
  border-radius: 3px;
  padding: 0 10px;
  background-size: 100%;
  cursor: pointer;
  transition: all 0.8s;
  -webkit-transition: all 0.8s;
  z-index: 9;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.1);
  border-radius: 50px !important;
  /* width: 175px !important; */
  left: 37px;
  bottom: 80px;
}
.hotline-bar > a {
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  font-weight: bold;
  text-indent: 50px;
  display: block;
  letter-spacing: 1px;
  line-height: 40px;
  font-family: Arial;
}
.hotline-bar > a:hover,
.hotline-bar > a:active {
  color: #fff;
}


.hotline-barmobile {
  position: absolute;
  background: rgba(230, 8, 8, 0.75);
  height: 40px;
  width: 180px;
  line-height: 40px;
  border-radius: 3px;
  padding: 0 10px;
  background-size: 100%;
  cursor: pointer;
  transition: all 0.8s;
  -webkit-transition: all 0.8s;
  z-index: 9;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.1);
  border-radius: 50px !important;
  /* width: 175px !important; */
  left: 37px;
  bottom: 80px;
}
.hotline-barmobile > a {
  color: #fff;
  text-decoration: none;
  font-size: 25px;
  font-weight: bold;
  text-indent: 50px;
  display: block;
  letter-spacing: 1px;
  line-height: 40px;
  font-family: Arial;
}
.hotline-barmobile > a:hover,
.hotline-barmobile > a:active {
  color: #fff;
}
@-webkit-keyframes phonering-alo-circle-anim {
  0% {
    -webkit-transform: rotate(0) scale(0.5) skew(1deg);
    -webkit-opacity: 0.1;
  }
  30% {
    -webkit-transform: rotate(0) scale(0.7) skew(1deg);
    -webkit-opacity: 0.5;
  }
  100% {
    -webkit-transform: rotate(0) scale(1) skew(1deg);
    -webkit-opacity: 0.1;
  }
}
@-webkit-keyframes phonering-alo-circle-fill-anim {
  0% {
    -webkit-transform: rotate(0) scale(0.7) skew(1deg);
    opacity: 0.6;
  }
  50% {
    -webkit-transform: rotate(0) scale(1) skew(1deg);
    opacity: 0.6;
  }
  100% {
    -webkit-transform: rotate(0) scale(0.7) skew(1deg);
    opacity: 0.6;
  }
}
@-webkit-keyframes phonering-alo-circle-img-anim {
  0% {
    -webkit-transform: rotate(0) scale(1) skew(1deg);
  }
  10% {
    -webkit-transform: rotate(-25deg) scale(1) skew(1deg);
  }
  20% {
    -webkit-transform: rotate(25deg) scale(1) skew(1deg);
  }
  30% {
    -webkit-transform: rotate(-25deg) scale(1) skew(1deg);
  }
  40% {
    -webkit-transform: rotate(25deg) scale(1) skew(1deg);
  }
  50% {
    -webkit-transform: rotate(0) scale(1) skew(1deg);
  }
  100% {
    -webkit-transform: rotate(0) scale(1) skew(1deg);
  }
}
@media (max-width: 760px) {
  .hotline-bar {
    display: none;
  }
}
@media (min-width: 760px) {
  .hotline-barmobile {
    display: none;
  }
}
</style>
<div class="hotline-phone-ring-wrap">
	<div class="hotline-phone-ring">
		<div class="hotline-phone-ring-circle"></div>
		<div class="hotline-phone-ring-circle-fill"></div>
		<div class="hotline-phone-ring-img-circle">
		<a href="tel:0929577791" class="pps-btn-img">
			<img src="https://playtimedigital.com/wp-content/uploads/2021/03/icon-call-nh.png" alt="Gọi điện thoại" width="50">
		</a>
		</div>
	</div>
	<div class="hotline-bar">
		<a href="tel:0929577791">
			<span class="text-hotline">0929.577.791</span>
		</a>
	</div>
<div class="hotline-barmobile">
		<a href="tel:0929577791">
			<span class="text-hotlinemobile">0929.577.791</span>
		</a>
	</div>
</div>

Chúc các bạn thành công!