body{<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:+84905008988" class="pps-btn-img" style="text-decoration:none">
        <i class="fa fa-phone" alt="hotline button" width="80" style="color:white"></i>
      </a>
    </div>
  </div>

</div>
  .hotline-phone-ring-wrap {
    position: fixed;
    bottom: 0;
    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: 85px;
    height: 85px;
    top: 10px;
    left: 10px;
    position: absolute;
    background-color: transparent;
    border-radius: 100%;
    border: 2px solidr #205FA0;
    -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: 55px;
    height: 55px;
    top: 25px;
    left: 25px;
    position: absolute;
    background-color: #205FA0;
    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: #205FA0;
    width: 33px;
    height: 33px;
    top: 37px;
    left: 37px;
    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;
  }
  @-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);
    }
  };}#footer{<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:+84902357348" class="pps-btn-img" style="text-decoration:none">
        <i class="fa fa-phone" alt="hotline button" width="80" style="color:white"></i>
      </a>
    </div>
  </div>

</div>
  .hotline-phone-ring-wrap {
    position: fixed;
    bottom: 0;
    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: 85px;
    height: 85px;
    top: 10px;
    left: 10px;
    position: absolute;
    background-color: transparent;
    border-radius: 100%;
    border: 2px solidr #205FA0;
    -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: 55px;
    height: 55px;
    top: 25px;
    left: 25px;
    position: absolute;
    background-color: #205FA0;
    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: #205FA0;
    width: 33px;
    height: 33px;
    top: 37px;
    left: 37px;
    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;
  }
  @-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);
    }
  };}