.zalo-container img {  max-width: 100%;  height: auto;}.zalo-container {  position: fixed;  bottom: 8rem; /* giữ nguyên */  z-index: 9;}.zalo-container:not(.right) {  left: 2.5rem; /* giữ nguyên */}.zalo-container.right {  right: 2.5rem; /* giữ nguyên */}.zalo-container a {  display: block;}.zalo-container .zalo-ico {  display: block;  position: relative;  z-index: 12;  cursor: pointer;}.zalo-container .zalo-ico:before {  top: 8px; /* giữ nguyên */  left: 50px; /* giữ nguyên */  z-index: 4;  content: '';  width: 16px; /* tăng từ 8px */  height: 16px; /* tăng từ 8px */  border-radius: 100%;  position: absolute;  border: 2px solid #fff; /* tăng từ 1px */  background-color: #7ed321;}.zalo-container .zalo-ico .zalo-ico-main {  display: block;  position: relative;  z-index: 3;  width: 90px; /* tăng từ 58px */  height: 90px; /* tăng từ 58px */}.zalo-container .zalo-ico em {  position: absolute;  top: 2px; /* giữ nguyên */  left: 22px; /* giữ nguyên */}.zalo-container .zalo-ico em:after,.zalo-container .zalo-ico em:before {  left: -4px; /* giữ nguyên */  top: 2px; /* giữ nguyên */  content: "";  width: 64px; /* tăng từ 32px */  height: 64px; /* tăng từ 32px */  position: absolute;  border-radius: 100%;  -webkit-animation: Grow 1.5s linear infinite;  animation: Grow 1.5s linear infinite;}.zalo-container .zalo-ico em:before {  -webkit-box-shadow: 0 0 16px 8px #7ed321; /* tăng từ 0 0 8px 4px */  box-shadow: 0 0 16px 8px #7ed321;}.zalo-container .zalo-ico em:after {  -webkit-box-shadow: inset 0 0 12px 4px #7ed321; /* tăng từ 0 0 6px 2px */  box-shadow: inset 0 0 12px 4px #7ed321;}@-webkit-keyframes Grow {  0% {    transform: scale(0.1);    -ms-transform: scale(0.1);    -webkit-transform: scale(0.1);    opacity: 0;    filter: alpha(opacity=0);  }  50% {    opacity: 1;    filter: alpha(opacity=100);  }  to {    transform: scale(3.6); /* tăng từ 1.8 */    -ms-transform: scale(3.6);    -webkit-transform: scale(3.6);    opacity: 0;    filter: alpha(opacity=0);  }}@keyframes Grow {  0% {    transform: scale(0.1);    -ms-transform: scale(0.1);    -webkit-transform: scale(0.1);    opacity: 0;    filter: alpha(opacity=0);  }  50% {    opacity: 1;    filter: alpha(opacity=100);  }  to {    transform: scale(3.6); /* tăng từ 1.8 */    -ms-transform: scale(3.6);    -webkit-transform: scale(3.6);    opacity: 0;    filter: alpha(opacity=0);  }}