好看的CSS效果

好看的效果

参考链接

1.复选框：
思路是使用复选框并进行隐藏，然后自己写一个div，并且用:before来放进div复选框这,不少地方采用绝对定位,在:checked时更改对应颜色。

    <div class="container">
      <h2>To it</h2>
      <ul>
        <li>
          <input type="radio" id="f-option" name="selector" />
          <label for="f-option">Pizza</label>
          <div class="check"></div>
        </li>

        <li>
          <input type="radio" id="s-option" name="selector" />
          <label for="s-option">Bacon</label>
          <div class="check">
            <div class="inside"></div>
          </div>
        </li>

        <li>
          <input type="radio" id="t-option" name="selector" />
          <label for="t-option">Cats</label>
          <div class="check">
            <div class="inside"></div>
          </div>
        </li>
      </ul>
    </div>

body,html{
    height: 100%;
    background: #222222;
    font-family: 'lato', sans-serif;
}
.container{
    display: block;
    position: relative;
    margin: 40px auto;
    height: auto;
    width: 500px;
    padding: 20px;
}

h2{
    color: #AAAAAA;
}

.container ul{
    list-style: none;
    margin: 0;
    padding: 0;
    overflow:auto;
}

ul li{
    color:#AAAAAA;
    display: block;
    position: relative;
    float: left;
    width: 100%;
    height: 100px;
    border-bottom: 1px solid #333;
}
ul li input[type=radio]{
    position: absolute;
    visibility: hidden;
}
ul li label{
    display: block;
    position: relative;
    font-weight: 300;
    font-size: 1.35em;
    padding: 25px 25px 25px 80px;
    margin: 10px auto;
    height: 30px;
    z-index: 9;
    cursor: pointer;
    transition: all 0.25s linear;
}

ul li:hover label{
    color: #fff;
}
ul li .check{
    display: block;
    position:absolute;
    border: 5px solid #AAAAAA;
    border-radius: 100%;
    height: 25px;
    width: 25px;
    top: 30px;
    left: 20px;
    z-index: 5;
    transition: border .25s linear;
    -webkit-animation: border .25s linear;
}

ul li:hover .check{
    border: 5px solid #fff;
}
ul li .check::before{
    display: block;
    position:absolute;
    content: '';
    border-radius: 100%;
    height: 15px;
    width: 15px;
    top: 5px;
    left: 5px;
    margin: auto;
    transition: all 0.25s linear;
}
input[type=radio]:checked ~ .check{
    border:5px solid #0DFF92
}
input[type=radio]:checked ~.check::before{
    background: #0DFF92;
}
input[type=radio]:checked ~ label{
    color: #0DFF92;
}

对应效果:

2.菜单栏：使用复选框,设置为透明,使用三条span实现图案，然后三个span可以通过transform来定义旋转角度以及设置变换原点，然后使用选择器三条杆的选择方向不同.

<nav role="navigation">
  <div id="menuToggle">
    <input type="checkbox"/>
    <span></span>
    <span></span>
    <span></span>
    <ul id="menu">
      <a href="#"><li>Home</li></a>
      <a href="#"><li>About</li></a>
      <a href="#"><li>Info</li></a>
    </ul>
  </div>
</nav>

body{
    margin: 0;
    padding: 0;
    background: #232323;
    color: #cdcdcd;
    font-family: "Avenir Next","Avenir",sans-serif;
}
#menuToggle{
    display: block;
    position: relative;
    top:50px;
    left: 50px;
    z-index: 1;
    user-select: none;
}
#menuToggle a{
    text-decoration: none;
    color: #232323;
    transition: color 0.3s ease;
}
#menuToggle a:hover{
    color: tomato;
}
#menuToggle input{
    display: block;
    width: 40px;
    height: 32px;
    position: absolute;
    top:-7px;
    left: -5px;
    cursor: pointer;
    opacity: 0;
    z-index:2;
}
#menuToggle span
{
display: block;
width: 33px;
height: 4px;
margin-bottom: 5px;
position: relative;
background:#cdcdcd;
border-radius: 3px;
z-index:1;
transform-origin: 4px 0px;
transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0),background 0.5s cubic-bezier(0.77,0.2,0.05,1.0),opacity 0.55s ease;
}
#menuToggle span:first-child
{
    transform-origin: 0% 0%;
}
#menuToggle span:nth-last-child(2)
{
    transform-origin: 0% 100%;
}
#menuToggle input:checked ~ span
{
    opacity: 1;
    transform: rotate(45deg) translate(-2px,-1px);
    background: #232323;
}
#menuToggle input:checked ~ span:nth-last-child(3)
{
    opacity: 0;
    transform: rotate(0deg) scale(0.2,0.2);
}
#menuToggle input:checked ~ span:nth-last-child(2)
{
    transform: rotate(-45deg) translate(0,-1px);
}
#menu
{
    position:absolute;
    width: 300px;
    margin: -100px 0 0 -50px;
    padding: 50px;
    padding-top: 125px;
    background: #ededed;
    list-style-type: none;
    -webkit-font-smoothing:antialiased;
    transform-origin: 0% 0%;
    transform: translate(-100%,0);
    transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0);
}
#menu li
{
    padding: 10px 0;
    font-size: 22px;
}
#menuToggle input:checked ~ ul
{
transform: none;
}

3. 注意label的for的使用和:before和:after的使用，通过把它们设置为绝对定位可以实现一些内嵌效果，此外可以手动阴影画勾号:

  <h1 class="title">Pure CSS Custom Checkboxes</h1>
    <ul class="unstyled centered">
      <li>
        <input class="styled-checkbox" type="checkbox" value="value1" id="styled-checkbox-1">
        <label for="styled-checkbox-1">Checkbox</label>
      </li>
      <li>
        <input class="styled-checkbox" type="checkbox" value="value2" id="styled-checkbox-2">
        <label for="styled-checkbox-2">w1</label>
      </li>
      <li>
        <input class="styled-checkbox" type="checkbox" value="value3" id="styled-checkbox-3" disabled>
        <label for="styled-checkbox-3"></label>
      </li>
    </ul>

.styled-checkbox{
    position: absolute;
    opacity: 0;
    &+ label{
    position: relative;
    cursor: pointer;
    padding: 0%;
    }
    &+label::before{
        content: '';
        margin-right: 10px;
        display: inline-block;
        vertical-align: text-top;
        width: 20px;
        height: 20px;
        background-color: white;
    }
    &:hover+label::before{
       background: #f35429;
    }
    &:focus+label::before{
        box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.12);
    }
    &:checked+label::before{
        background: #f35429;
    }
    &:disabled+label{
        color: #b8b8b8;
        cursor:auto;
    }
    &:disabled+label::before{
        box-shadow: none;
        background: #ddd;
    }
    &:checked+label::after{//这是手动画勾
        content: '';
        position: absolute;
        left: 5px;
        top: 9px;
        background: white;
        width: 2px;
        height: 2px;
        box-shadow: 
        2px 0 0 white,
        4px 0 0 white,
        4px -2px 0 white,
        4px -4px 0 white,
        4px -6px 0 white,
        4px -8px 0 white;
        transform: rotate(45deg);
    }
}
html {
    background: lightgray;
  }
  
  body {
    font-family: 'Source Sans Pro', sans-serif;
  }
  
  .unstyled {
    margin: 0;
    padding: 0;
    list-style-type: none;
  }
  
  li {
    margin: 20px 0;
  }
  
  .centered {
    width: 300px;
    margin: auto;
  }
  
  .title {
    text-align: center;
    color: rgb(69, 113, 236);
  }

效果如下:

4. 弹窗效果： background-clip设置背景图的延伸范围,在部分可以多使用绝对定位,使用fixed定位+top/b/l/r设置为0可以全屏覆盖.

  <h1>Popup/Modal Windows</h1>
  <div class="box">
    <a class="button" href="#popup1">Let me Pop up</a>
  </div>
  <div id="popup1" class="overlay">
    <div class="popup">
      <a class="close" href="#">&times;</a>
       <h2>Here i am</h2>
    </div>
  </div>

body{
  font-family: Arial,sans-serif;
  background: url(http://www.shukatsu-note.com/wp-content/uploads/2014/12/computer-564136_1280.jpg) no-repeat;
  background-size: cover;
  height: 100vh;
}
h1{
  text-align: center;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #06D85F;
  margin:80px 0;
}
.box{
  width: 40%;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.2);
  padding: 35px;
  border: 2px solid #fff;
  border-radius: 20px/50px;
  background-clip: padding-box;
  text-align: center;
}
.button{
  font-size: 1em;
  padding: 10px;
  color: #fff;
  border:2px solid #06D85F;
  border-radius: 20px/50px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}
.button:hover{
  background: #06D85F;
}
.overlay{
  position:fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition:  opacity 500ms;
  visibility: hidden;
  opacity: 0;
}
.overlay:target {
  visibility: visible;
  opacity: 1;
}
.popup{
  margin: 70px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 5px;
  width: 30%;
  position: relative;
  transition: all 5s ease-in-out;
}
.popup h2{
  margin-top: 0;
  color:#333;
  font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.popup .close{
  position:absolute;
  top: 20px;
  right: 30px;
  transition: all 200ms;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
}
.popup .close:hover{
  color: #06D85F;
}
.popup .content{
  max-height: 30%;
  overflow: auto;
}
@media screen and(max-width:700px) {
.box{
  width: 70%;
}
.popup{
  width: 70%;
}  
}

5. box-sizing属性：content-box(默认值，元素的宽度之后再加上边框和内边距才能是最终宽度),border-box(把边框和padding算进宽度中)
6. HSL颜色定义：如background: hsl(50 80% 40%);由色相，饱和度，和明度指定。对于一个悬浮渐变效果来说，思路是悬浮时在::before的左下角作为基准点缩放，不悬浮时以右下角作为基准点。

h1::before{
  transform:scaleX(0);
  transform-origin:bottom right;
}
h1:hover::before {
  transform: scaleX(1);
  transform-origin: bottom left;
}