如何利用CSS3实现input 输入框动画样式库

 
Click every input.
                    
                                                                                                    
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    Age     Height     Weight 
    Class     Element     Move 
    English     Burger     Wallet 
    Credit Card     Expires     Security Code 
    Knock knock     Max     Maxed out card ;) 
    Artist     Song     Eyes 
    State     Planet     Galaxy 

@import "compass/css3"; @import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700,600,300,800); * { box-sizing: border-box;}html,body { overflow-x: hidden; font-family: "Open Sans", sans-serif; font-weight: 300; color: #fff; background: #efefef;}@mixin epic-sides() { // https://codepen.io/MichaelArestad/pen/qltuk   position: relative;   z-index: 1;    &:before {       position: absolute;       content: "";       display: block;       top: 0;       left: -5000px;       height: 100%;       width: 15000px;       z-index: -1;       @content;   }}.row { max-width: 800px; margin: 0 auto; padding: 60px 30px; background: #032429; @include epic-sides() {background: inherit;} text-align: center;  &:first-child {   padding: 40px 30px; } &:nth-child(2), &:nth-child(8), &:nth-child(10){   background: #134A46; } &:nth-child(3), &:nth-child(7) {   background: #377D6A; } &:nth-child(4), &:nth-child(6) {   background: #7AB893; } &:nth-child(5) {   background: #B2E3AF; }  span {   position: relative;   display: inline-block;   margin: 30px 10px; }}.basic-slide { display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 70px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: inline-block;   position: absolute;   top: 0;   left: 0;   padding: 10px 15px;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   background: #7AB893;   transition: all .3s ease-in-out;   border-top-left-radius: 3px;   border-bottom-left-radius: 3px; }}.basic-slide:focus,.basic-slide:active { color: #377D6A; text-indent: 0; background: #fff; border-top-left-radius: 0; border-bottom-left-radius: 0;  &::-webkit-input-placeholder {   color: #aaa; } + label {   transform: translateX(-100%); }}.clean-slide { position: relative; display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 60px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: inline-block;   position: absolute;   transform: translateX(0);   top: 0;   left: 0;   bottom: 0;   padding: 13px 15px;   font-size: 11px;   font-weight: 700;   text-transform: uppercase;   color: #032429;   text-align: left;   text-shadow: 0 1px 0 rgba(255,255,255,.4);   transition: all .3s ease-in-out, color .3s ease-out;   border-top-left-radius: 3px;   border-bottom-left-radius: 3px;   overflow: hidden;      &:after {     content: "";     position: absolute;     top: 0;     right: 100%;     bottom: 0;     width: 100%;     background: #7AB893;     z-index: -1;     transform: translate(0);     transition: all .3s ease-in-out;     border-top-left-radius: 3px;     border-bottom-left-radius: 3px;   } }}.clean-slide:focus,.clean-slide:active { color: #377D6A; text-indent: 0; background: #fff; border-top-left-radius: 0; border-bottom-left-radius: 0;  &::-webkit-input-placeholder {   color: #aaa; } + label {   color: #fff;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   transform: translateX(-100%);      &:after {     transform: translate(100%);   } }}.gate { display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 65px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: inline-block;   position: absolute;   top: 0;   left: 0;   padding: 10px 15px;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   background: #7AB893;   transition: all .4s ease-in-out;   border-top-left-radius: 3px;   border-bottom-left-radius: 3px;   transform-origin: left bottom;   z-index: 99;      &:before,   &:after {     content: "";     position: absolute;     top: 0;     right: 0;     bottom: 0;     left: 0;     border-radius: 3px;     background: #377D6A;     transform-origin: left bottom;     transition: all .4s ease-in-out;     pointer-events: none;     z-index: -1;   }   &:before {     background: rgba(3,36,41,.2);     z-index: -2;     right: 20%;   } }}span:nth-child(2) .gate { text-indent: 85px;}span:nth-child(2) .gate:focus,span:nth-child(2) .gate:active{ text-indent: 0;}.gate:focus,.gate:active { color: #377D6A; text-indent: 0; background: #fff; border-top-right-radius: 3px; border-bottom-right-radius: 3px;  &::-webkit-input-placeholder {   color: #aaa; } + label {   transform: rotate(-66deg);   border-radius: 3px;      &:before {     transform: rotate(10deg);   } }}.skinny { display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 75px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: inline-block;   position: absolute;   transform: translateX(0);   top: 0;   left: 0;   padding: 10px 15px;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   transition: all .3s ease-in-out;   border-top-left-radius: 3px;   border-bottom-left-radius: 3px;   overflow: hidden;    &:before,   &:after {     content: "";     position: absolute;     right: 0;     left: 0;     z-index: -1;     transition: all .3s ease-in-out;   }   &:before {     // Skinny bit here     top: 5px;     bottom: 5px;     background: #377D6A; // change this to #134A46     border-top-left-radius: 3px;     border-bottom-left-radius: 3px;   }   &:after {     top: 0;     bottom: 0;     background: #377D6A;   } }}.skinny:focus,.skinny:active { color: #377D6A; text-indent: 0; background: #fff;  &::-webkit-input-placeholder {   color: #aaa; } + label {   transform: translateX(-100%);      &:after {     transform: translateX(100%);   } }}.slide-up { display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 80px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: inline-block;   position: absolute;   transform: translateX(0);   top: 0;   left: 0;   padding: 10px 15px;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   transition: all .3s ease-in-out;   border-top-left-radius: 3px;   border-bottom-left-radius: 3px;   overflow: hidden;    &:before,   &:after {     content: "";     position: absolute;     right: 0;     left: 0;     z-index: -1;     transition: all .3s ease-in-out;   }   &:before {     // Skinny bit here     top: 6px;     left: 5px;     right: 5px;     bottom: 6px;     background: #377D6A; // change this to #134A46   }   &:after {     top: 0;     bottom: 0;     background: #377D6A;   } }}span:nth-child(1) .slide-up { text-indent: 105px;}span:nth-child(3) .slide-up { text-indent: 125px;}span:nth-child(1) .slide-up:focus,span:nth-child(1) .slide-up:active,span:nth-child(3) .slide-up:focus,span:nth-child(3) .slide-up:active { text-indent: 0;}.slide-up:focus,.slide-up:active { color: #377D6A; text-indent: 0; background: #fff;  &::-webkit-input-placeholder {   color: #aaa; } + label {   transform: translateY(-100%);    &:before {     border-radius: 5px;   }   &:after {     transform: translateY(100%);   } }}.card-slide { display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 115px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: block;   position: absolute;   top: 0;   left: 0;   padding: 10px 15px;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   background: #7AB893;   transition: all .3s ease-in-out;   border-top-left-radius: 3px;   border-bottom-left-radius: 3px;   transform-origin: right center;   transform: perspective(300px) scaleX(1) rotateY(0deg); }}span:nth-child(2) .card-slide { text-indent: 55px;}span:nth-child(3) .card-slide { text-indent: 150px;}span:nth-child(2) .card-slide:focus,span:nth-child(2) .card-slide:active,span:nth-child(3) .card-slide:focus,span:nth-child(3) .card-slide:active { text-indent: 0;}.card-slide:focus,.card-slide:active { color: #377D6A; text-indent: 0; background: #fff; border-top-left-radius: 0; border-bottom-left-radius: 0;  &::-webkit-input-placeholder {   color: #aaa; } + label {   transform: perspective(600px) translateX(-100%) rotateY(80deg); }}.swing { display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 60px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: inline-block;   position: absolute;   top: 0;   left: 0;   padding: 10px 15px;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   background: #7AB893;   border-top-left-radius: 3px;   border-bottom-left-radius: 3px;   transform-origin: 2px 2px;   transform: rotate(0);   // There should be a better way   animation: swing-back .4s 1 ease-in-out; }}@keyframes swing { 0% {   transform: rotate(0); } 20% {   transform: rotate(116deg); } 40% {   transform: rotate(60deg); } 60% {   transform: rotate(98deg); } 80% {   transform: rotate(76deg); } 100% {   transform: rotate(82deg); }}@keyframes swing-back { 0% {   transform: rotate(82deg); } 100% {   transform: rotate(0); }}.swing:focus,.swing:active { color: #377D6A; text-indent: 0; background: #fff; border-top-left-radius: 0; border-bottom-left-radius: 0;  &::-webkit-input-placeholder {   color: #aaa; } + label {   animation: swing 1.4s 1 ease-in-out;   transform: rotate(82deg); }}.balloon { // As suggested by https://twitter.com/dbox/status/365888496486985728 display: inline-block; width: 215px; padding: 10px 0 10px 15px; font-family: "Open Sans", sans; font-weight: 400; color: #377D6A; background: #efefef; border: 0; border-radius: 3px; outline: 0; text-indent: 60px; // Arbitrary. transition: all .3s ease-in-out;  &::-webkit-input-placeholder {   color: #efefef;   text-indent: 0;   font-weight: 300; }  + label {   display: inline-block;   position: absolute;   top: 8px;   left: 0;   bottom: 8px;   padding: 5px 15px;   color: #032429;   font-size: 11px;   font-weight: 700;   text-transform: uppercase;   text-shadow: 0 1px 0 rgba(19,74,70,0);   transition: all .3s ease-in-out;   border-radius: 3px;   background: rgba(122,184,147,0);      &:after {     position: absolute;     content: "";     width: 0;     height: 0;     top: 100%;     left: 50%;     margin-left: -3px;     border-left: 3px solid transparent;     border-right: 3px solid transparent;     border-top: 3px solid rgba(122,184,147,0);     transition: all .3s ease-in-out;   } }}.balloon:focus,.balloon:active { color: #377D6A; text-indent: 0; background: #fff;  &::-webkit-input-placeholder {   color: #aaa; } + label {   color: #fff;   text-shadow: 0 1px 0 rgba(19,74,70,.4);   background: rgba(122,184,147,1);   transform: translateY(-40px);      &:after {     border-top: 4px solid rgba(122,184,147,1);   } }}