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@keyframes fadeAboutUs{0%,5%{opacity:0}10%,25%{opacity:1}35%,to{opacity:0}}.about-us-operate-black img{opacity:0;animation:8.8s linear infinite fadeAboutUs}.about-us-operate-black-mobile img{opacity:0;animation:4.4s linear infinite fadeAboutUs}.about-us-operate-black-mobile img:first-child{animation-delay:0s}.about-us-operate-black-mobile img:nth-child(2){animation-delay:.7s}.about-us-operate-black-mobile img:nth-child(3){animation-delay:1.4s}.about-us-operate-black-mobile img:nth-child(4){animation-delay:2.1s}.about-us-operate-black-mobile img:nth-child(5){animation-delay:2.8s}.about-us-operate-black img:first-child{animation-delay:0s}.about-us-operate-black img:nth-child(2){animation-delay:.7s}.about-us-operate-black img:nth-child(3){animation-delay:1.4s}.about-us-operate-black img:nth-child(4){animation-delay:2.1s}.about-us-operate-black img:nth-child(5){animation-delay:2.8s}.about-us-operate-black img:nth-child(6){animation-delay:3.5s}.about-us-operate-black img:nth-child(7){animation-delay:4.2s}.about-us-operate-black img:nth-child(8){animation-delay:4.9s}.about-us-operate-black img:nth-child(9){animation-delay:5.6s}.about-us-operate-black img:nth-child(10){animation-delay:6.3s}.about-us-operate-black img:nth-child(11){animation-delay:7s}