CSS3实现各种表情（代码示例）

                body {  text-align: center;  margin: 80px auto 0;  font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;}.emoji {  width: 120px;  height: 120px;  margin: 15px;  background: #FFDA6A;  display: inline-block;  border-radius: 50%;  position: relative;}.emoji:after {  position: absolute;  bottom: -40px;  font-size: 18px;  width: 60px;  left: calc(50% - 30px);  color: #8A8A8A;}.emoji__face, .emoji__eyebrows, .emoji__eyes, .emoji__mouth, .emoji__tongue, .emoji__heart, .emoji__hand, .emoji__thumb {  position: absolute;}.emoji__face:before, .emoji__face:after, .emoji__eyebrows:before, .emoji__eyebrows:after, .emoji__eyes:before, .emoji__eyes:after, .emoji__mouth:before, .emoji__mouth:after, .emoji__tongue:before, .emoji__tongue:after, .emoji__heart:before, .emoji__heart:after, .emoji__hand:before, .emoji__hand:after, .emoji__thumb:before, .emoji__thumb:after {  position: absolute;  content: '';}.emoji__face {  width: inherit;  height: inherit;}.emoji--like {  background: #548DFF;}.emoji--like:after {  content: 'Like';}.emoji--like .emoji__hand {  left: 25px;  bottom: 30px;  width: 20px;  height: 40px;  background: #FFFFFF;  border-radius: 5px;  z-index: 0;  animation: hands-up 2s linear infinite;}.emoji--like .emoji__hand:before {  left: 25px;  bottom: 5px;  width: 40px;  background: inherit;  height: 10px;  border-radius: 2px 10px 10px 2px;  box-shadow: 1px -9px 0 1px #FFFFFF, 2px -19px 0 2px #FFFFFF, 3px -29px 0 3px #FFFFFF;}.emoji--like .emoji__thumb {  border-bottom: 20px solid #FFFFFF;  border-left: 20px solid transparent;  top: -25px;  right: -25px;  z-index: 2;  transform: rotate(5deg);  transform-origin: 0% 100%;  animation: thumbs-up 2s linear infinite;}.emoji--like .emoji__thumb:before {  border-radius: 50% 50% 0 0;  background: #FFFFFF;  width: 10px;  height: 12px;  left: -10px;  top: -8px;  transform: rotate(-15deg);  transform-origin: 100% 100%;  box-shadow: -1px 4px 0 -1px #FFFFFF;}.emoji--love {  background: #F55064;}.emoji--love:after {  content: 'Love';}.emoji--love .emoji__heart {  left: calc(50% - 40px);  top: calc(50% - 40px);  width: 80px;  height: 80px;  animation: heart-beat 1s linear infinite alternate;}.emoji--love .emoji__heart:before, .emoji--love .emoji__heart:after {  left: calc(50% - 20px);  top: calc(50% - 32px);  width: 40px;  height: 64px;  background: #FFFFFF;  border-radius: 20px 20px 0 0;}.emoji--love .emoji__heart:before {  transform: translate(20px) rotate(-45deg);  transform-origin: 0 100%;}.emoji--love .emoji__heart:after {  transform: translate(-20px) rotate(45deg);  transform-origin: 100% 100%;}.emoji--haha:after {  content: 'Haha';}.emoji--haha .emoji__face {  animation: haha-face 2s linear infinite;}.emoji--haha .emoji__eyes {  width: 26px;  height: 6px;  border-radius: 2px;  left: calc(50% - 13px);  top: 35px;  transform: rotate(20deg);  background: transparent;  box-shadow: -25px 5px 0 0 #000000, 25px -5px 0 0 #000000;}.emoji--haha .emoji__eyes:after {  left: 0;  top: 0;  width: 26px;  height: 6px;  border-radius: 2px;  transform: rotate(-40deg);  background: transparent;  box-shadow: -25px -5px 0 0 #000000, 25px 5px 0 0 #000000;}.emoji--haha .emoji__mouth {  width: 80px;  height: 40px;  left: calc(50% - 40px);  top: 50%;  background: #000000;  border-radius: 0 0 40px 40px;  overflow: hidden;  z-index: 1;  animation: haha-mouth 2s linear infinite;}.emoji--haha .emoji__tongue {  width: 70px;  height: 30px;  background: #F55064;  left: calc(50% - 35px);  bottom: -10px;  border-radius: 50%;}.emoji--yay:after {  content: 'Yay';  animation: yay-reverse 1s linear infinite;}.emoji--yay .emoji__face {  animation: yay 1s linear infinite alternate;}.emoji--yay .emoji__eyebrows {  left: calc(50% - 3px);  top: 30px;  height: 6px;  width: 6px;  border-radius: 50%;  background: transparent;  box-shadow: -6px 0 0 0 #000000, -36px 0 0 0px #000000, 6px 0 0 0 #000000, 36px 0 0 0px #000000;}.emoji--yay .emoji__eyebrows:before, .emoji--yay .emoji__eyebrows:after {  width: 36px;  height: 18px;  border-radius: 60px 60px 0 0;  background: transparent;  border: 6px solid black;  box-sizing: border-box;  border-bottom: 0;  bottom: 3px;  left: calc(50% - 18px);}.emoji--yay .emoji__eyebrows:before {  margin-left: -21px;}.emoji--yay .emoji__eyebrows:after {  margin-left: 21px;}.emoji--yay .emoji__mouth {  top: 60px;  background: transparent;  left: 50%;}.emoji--yay .emoji__mouth:after {  width: 80px;  height: 80px;  left: calc(50% - 40px);  top: -75px;  border-radius: 50%;  background: transparent;  border: 6px solid #000000;  box-sizing: border-box;  border-top-color: transparent;  border-left-color: transparent;  border-right-color: transparent;  z-index: 1;}.emoji--yay .emoji__mouth:before {  width: 6px;  height: 6px;  background: transparent;  border-radius: 50%;  bottom: 5px;  left: calc(50% - 3px);  box-shadow: -25px 0 0 0 #000000, 25px 0 0 0 #000000, -35px -2px 30px 10px #D5234C, 35px -2px 30px 10px #D5234C;}.emoji--wow:after {  content: 'Wow';}.emoji--wow .emoji__face {  animation: wow-face 3s linear infinite;}.emoji--wow .emoji__eyebrows {  left: calc(50% - 3px);  height: 6px;  width: 6px;  border-radius: 50%;  background: transparent;  box-shadow: -18px 0 0 0 #000000, -33px 0 0 0 #000000, 18px 0 0 0 #000000, 33px 0 0 0 #000000;  animation: wow-brow 3s linear infinite;}.emoji--wow .emoji__eyebrows:before, .emoji--wow .emoji__eyebrows:after {  width: 24px;  height: 20px;  border: 6px solid #000000;  box-sizing: border-box;  border-radius: 50%;  border-bottom-color: transparent;  border-left-color: transparent;  border-right-color: transparent;  top: -3px;  left: calc(50% - 12px);}.emoji--wow .emoji__eyebrows:before {  margin-left: -25px;}.emoji--wow .emoji__eyebrows:after {  margin-left: 25px;}.emoji--wow .emoji__eyes {  width: 16px;  height: 24px;  left: calc(50% - 8px);  top: 35px;  border-radius: 50%;  background: transparent;  box-shadow: 25px 0 0 0 #000000, -25px 0 0 0 #000000;}.emoji--wow .emoji__mouth {  width: 30px;  height: 45px;  left: calc(50% - 15px);  top: 50%;  border-radius: 50%;  background: #000000;  animation: wow-mouth 3s linear infinite;}.emoji--sad:after {  content: 'Sad';}.emoji--sad .emoji__face {  animation: sad-face 2s ease-in infinite;}.emoji--sad .emoji__eyebrows {  left: calc(50% - 3px);  top: 35px;  height: 6px;  width: 6px;  border-radius: 50%;  background: transparent;  box-shadow: -40px 9px 0 0 #000000, -25px 0 0 0 #000000, 25px 0 0 0 #000000, 40px 9px 0 0 #000000;}.emoji--sad .emoji__eyebrows:before, .emoji--sad .emoji__eyebrows:after {  width: 30px;  height: 20px;  border: 6px solid #000000;  box-sizing: border-box;  border-radius: 50%;  border-bottom-color: transparent;  border-left-color: transparent;  border-right-color: transparent;  top: 2px;  left: calc(50% - 15px);}.emoji--sad .emoji__eyebrows:before {  margin-left: -30px;  transform: rotate(-30deg);}.emoji--sad .emoji__eyebrows:after {  margin-left: 30px;  transform: rotate(30deg);}.emoji--sad .emoji__eyes {  width: 14px;  height: 16px;  left: calc(50% - 7px);  top: 50px;  border-radius: 50%;  background: transparent;  box-shadow: 25px 0 0 0 #000000, -25px 0 0 0 #000000;}.emoji--sad .emoji__eyes:after {  background: #548DFF;  width: 12px;  height: 12px;  margin-left: 6px;  border-radius: 0 100% 40% 50% / 0 50% 40% 100%;  transform-origin: 0% 0%;  animation: tear-drop 2s ease-in infinite;}.emoji--sad .emoji__mouth {  width: 60px;  height: 80px;  left: calc(50% - 30px);  top: 80px;  box-sizing: border-box;  border: 6px solid #000000;  border-radius: 50%;  border-bottom-color: transparent;  border-left-color: transparent;  border-right-color: transparent;  background: transparent;  animation: sad-mouth 2s ease-in infinite;}.emoji--sad .emoji__mouth:after {  width: 6px;  height: 6px;  background: transparent;  border-radius: 50%;  top: 4px;  left: calc(50% - 3px);  box-shadow: -18px 0 0 0 #000000, 18px 0 0 0 #000000;}.emoji--angry {  background: linear-gradient(#D5234C -10%, #FFDA6A);  background-size: 100%;  animation: angry-color 2s ease-in infinite;}.emoji--angry:after {  content: 'Angry';}.emoji--angry .emoji__face {  animation: angry-face 2s ease-in infinite;}.emoji--angry .emoji__eyebrows {  left: calc(50% - 3px);  top: 55px;  height: 6px;  width: 6px;  border-radius: 50%;  background: transparent;  box-shadow: -44px 5px 0 0 #000000, -7px 16px 0 0 #000000, 7px 16px 0 0 #000000, 44px 5px 0 0 #000000;}.emoji--angry .emoji__eyebrows:before, .emoji--angry .emoji__eyebrows:after {  width: 50px;  height: 20px;  border: 6px solid #000000;  box-sizing: border-box;  border-radius: 50%;  border-top-color: transparent;  border-left-color: transparent;  border-right-color: transparent;  top: 0;  left: calc(50% - 25px);}.emoji--angry .emoji__eyebrows:before {  margin-left: -25px;  transform: rotate(15deg);}.emoji--angry .emoji__eyebrows:after {  margin-left: 25px;  transform: rotate(-15deg);}.emoji--angry .emoji__eyes {  width: 12px;  height: 12px;  left: calc(50% - 6px);  top: 70px;  border-radius: 50%;  background: transparent;  box-shadow: 25px 0 0 0 #000000, -25px 0 0 0 #000000;}.emoji--angry .emoji__mouth {  width: 36px;  height: 18px;  left: calc(50% - 18px);  bottom: 15px;  background: #000000;  border-radius: 50%;  animation: angry-mouth 2s ease-in infinite;}@keyframes heart-beat {  25% {    transform: scale(1.1);  }  75% {    transform: scale(0.6);  }}@keyframes haha-face {  10% {    transform: translateY(25px);  }  20% {    transform: translateY(15px);  }  30% {    transform: translateY(25px);  }  40% {    transform: translateY(15px);  }  50% {    transform: translateY(25px);  }  60% {    transform: translateY(0);  }  70% {    transform: translateY(-10px);  }  80% {    transform: translateY(0);  }  90% {    transform: translateY(-10px);  }}@keyframes haha-mouth {  10% {    transform: scale(0.6);    top: 45%;  }  20% {    transform: scale(0.8);    top: 45%;  }  30% {    transform: scale(0.6);    top: 45%;  }  40% {    transform: scale(0.8);    top: 45%;  }  50% {    transform: scale(0.6);    top: 45%;  }  60% {    transform: scale(1);    top: 50%;  }  70% {    transform: scale(1.2);    top: 50%;  }  80% {    transform: scale(1);    top: 50%;  }  90% {    transform: scale(1.1);    top: 50%;  }}@keyframes yay {  25% {    transform: rotate(-15deg);  }  75% {    transform: rotate(15deg);  }}@keyframes wow-face {  15%, 25% {    transform: rotate(20deg) translateX(-25px);  }  45%, 65% {    transform: rotate(-20deg) translateX(25px);  }  75%, 100% {    transform: rotate(0deg) translateX(0);  }}@keyframes wow-brow {  15%, 65% {    top: 25px;  }  75%, 100%, 0% {    top: 15px;  }}@keyframes wow-mouth {  10%, 30% {    width: 20px;    height: 20px;    left: calc(50% - 10px);  }  50%, 70% {    width: 30px;    height: 40px;    left: calc(50% - 15px);  }  75%, 100% {    height: 50px;  }}@keyframes sad-face {  25%, 35% {    top: -15px;  }  55%, 95% {    top: 10px;  }  100%, 0% {    top: 0;  }}@keyframes sad-mouth {  25%, 35% {    transform: scale(0.85);    top: 70px;  }  55%, 100%, 0% {    transform: scale(1);    top: 80px;  }}@keyframes tear-drop {  0%, 100% {    display: block;    left: 35px;    top: 15px;    transform: rotate(45deg) scale(0);  }  25% {    display: block;    left: 35px;    transform: rotate(45deg) scale(2);  }  49.9% {    display: block;    left: 35px;    top: 65px;    transform: rotate(45deg) scale(0);  }  50% {    display: block;    left: -35px;    top: 15px;    transform: rotate(45deg) scale(0);  }  75% {    display: block;    left: -35px;    transform: rotate(45deg) scale(2);  }  99.9% {    display: block;    left: -35px;    top: 65px;    transform: rotate(45deg) scale(0);  }}@keyframes hands-up {  25% {    transform: rotate(15deg);  }  50% {    transform: rotate(-15deg) translateY(-10px);  }  75%, 100% {    transform: rotate(0deg);  }}@keyframes thumbs-up {  25% {    transform: rotate(20deg);  }  50%, 100% {    transform: rotate(5deg);  }}@keyframes angry-color {  45%, 60% {    background-size: 250%;  }  85%, 100%, 0% {    background-size: 100%;  }}@keyframes angry-face {  35%, 60% {    transform: translateX(0) translateY(10px) scale(0.9);  }  40% {    transform: translateX(-5px) translateY(10px) scale(0.9);  }  45% {    transform: translateX(5px) translateY(10px) scale(0.9);  }  50% {    transform: translateX(-5px) translateY(10px) scale(0.9);  }  55% {    transform: translateX(5px) translateY(10px) scale(0.9);  }}@keyframes angry-mouth {  25%, 50% {    height: 6px;    bottom: 25px;  }}