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为什么表格给予宽度10%会有100%的效果

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属性属性

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

height: 40px;
    width:10%;
   padding-left: 18px;

下拉菜单出不来

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布局

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

main {
    background-color: #fafafa;
}

header {
    /* height: 50px;   神坑定高！下拉出不来   */
}

.head-top {
    display: flex;
    justify-content: space-between;
}

/*客服热线*/
.tel {
    margin-top: 0.5%;
    margin-left: 2%;
    margin-top: 3px;
    font-size: 12px;
    color: #29B078;
}

/*微信微博qq图标*/
.head-img {
    margin-right: 2%;
}


.head-img img {
    width: 20px;
    margin-left: 8px;
}


/*加跳转链接*/
.head-text a {
    text-decoration: none;
    color: #ffffff;
}


.carousel-caption .text-4 a {
    text-decoration: none;
    color: #ffffff;
}


.navbar-nav .nav-item .nav-link {
    padding: 15px;
    border: 1px solid #26a26f;
}


.navbar-nav .nav-item .nav-link:hover {
    border-bottom: 1px solid white;
}



/*下面是轮播图的Boot4组件*/

/*这个类，组件里自带了absolute，我这里修改的是文字上移的位置*/
.carousel-caption {
    bottom: 32% !important;
}

/* Make the image fully responsive 让图片全屏展示*/
.carousel-inner img {
    width: 100%;
    height: 100%;
}

.carousel-inner .text {
    text-align: center;
    font-weight: bold;
    font-size: 2.5vw;
    color: #ffffff;
}

.carousel-inner .text-2 {
    text-align: center;
    font-weight: bold;
    font-size: 3vw;
    letter-spacing: 2px;
    color: #ffffff;
}

.carousel-inner .text-2 span {
    font-size: 4.5vw;
    letter-spacing: 2px;
    color: #ffffff;
}


.carousel-inner .text-3 {
    text-align: center;
    font-weight: bold;
    font-size: 6.5vw;
    font-family: MicrosoftJhengHei;
    color: #ffffff;
}


.carousel-inner .text-4 {
    text-align: center;
    font-size: 5.5vw;
    font-family: MicrosoftJhengHei;
    letter-spacing: 2px;
    color: #ffffff;
}


.container.intro {
    margin-bottom: 120px;
}

底部的按钮不能随着屏幕同步缩放

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class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

    <footer>
        <div class="end">
             <button class="stay">留言</button>
             <button class="coll">电话联系</button>
        </div>
    </footer>

.end{
    display:flex;
    justify-content:space-around; 
    position:fixed;
    bottom: 5px;
}
.stay {
    background-color: #ffffff;    
    color: #66cccc;
    padding: 8px 50px 8px 50px;
    margin: 0 5px 2px 12px;
    border-radius: 0.5rem;
    border-color: #66cccc;
}
.coll {
    background-color: #66cccc;    
    color: #ffffff;
    padding: 8px 48px 8px 48px;
    margin: 0  12px 2px 12px;
    border-radius: 0.5rem;
    border-color: #66cccc;
}

除了弄个盒子加margin-left设置底边框做成这样的样式还有其他方法吗。

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背景图片属性边距定位属性

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

.home {
    width: calc(100% - 1.65rem);
    height: 5rem;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-left: 1.65rem;
    border-bottom: 1px solid #e1e5e7;
}

父元素使用伪类hover时出现了子元素出现同样效果的问题

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hover

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

           <div class="col-xs-12  col-sm-12 col-md-5 main4-box">
                <div class="main4-icobox">
                    <div class="main4-ico1 main4-clearhover"></div>
                </div>
            </div>
.main4-box :hover {
    box-shadow: 0 0 1px #9E9E9E;
}

轮播图能否不使用绝对定位

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轮播

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

.frame{
    box-sizing: border-box;
    position: fixed;
    overflow:hidden; 
    padding-bottom: 30%;
    min-width: 100%;
    .photos {  
        position: absolute;
        width: 100%;
        overflow: hidden;
        .roll { 
            float: left;
            width: 100%;
        }
        .boil {
            background: url(./images/Image.png) no-repeat;
            background-size:100% 100%;
        }
        .boil-one {
            animation: myfirst 10s ease  infinite normal;
        }
        .boil-tow {
            animation: myfirst 10s ease  infinite normal;
        }
        .boil-tir {
            animation: myfirst 10s ease  infinite normal;
        }
        @keyframes myfirst {
            30%,50% {margin-left: -100%;}
            55%,75% {margin-left: -200%;}
            80%,100% {margin-left: -300%;}
        }
    }    
}

怎么引用公共less文件，

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Less

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

@fullwidth:100%;
@fullheight:100%;
@bg-content:#fafafa;
@base:#29b078;
@font-size:14px;
@color:#bfbfbf;
@body:{margin:0;padding:0}
@p:{margin:0;padding:0}

怎样让轮播图下面的小圆点，当点击的时候切换到另一张图片时背景颜色能变成白色？

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表单元素轮播

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

css：
/*轮播图*/
.carousel{
  position: relative;
  width: 100%;
  overflow: hidden;
}
.carousel-open:checked + .carousel-item {
  position: relative;
  opacity: 1;
}
.carousel-item {
  position: absolute;
  opacity: 0;
  transition: opacity 0.6s ease-out;
}
.carousel-control {
  background: rgba(0, 0, 0, 0.28);
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: none;
  font-size: 40px;
  height: 40px;
  line-height: 35px;
  position: absolute;
  top: 50%;
  cursor: pointer;
  transform: translate(0, -50%);
  text-align: center;
  width: 40px;
  z-index: 10;
}
.carousel-control.prev {
  left: 2%;
}
.carousel-control.next {
  right: 2%;
}
#carousel-1:checked ~ .control-1,
#carousel-2:checked ~ .control-2,
#carousel-3:checked ~ .control-3,
#carousel-4:checked ~ .control-4,
#carousel-5:checked ~ .control-5{display: block}
.carousel-item img {
  display: block;
  height: auto;
  max-width: 100%;}
.instructions{
  position: absolute;
  margin:0 auto;
  bottom: 10px;
  left: 0;
  right: 0;
  width: 90px;
  li{display: inline-block}
}
.bullet{display: inline-block;
  width: 10px;
  height: 10px;
  margin: 1px;
  cursor: pointer;
  background-color: rgba(0,0,0,0);
  border: 1px solid #fff;
  border-radius: 10px;}

html：   <div class="carousel">
        <input class="carousel-open" type="radio" id="carousel-1" name="carousel" aria-hidden="true" hidden="" checked="checked">
        <div class="carousel-item">
            <img src="../image/2.png">
        </div>
        <input class="carousel-open" type="radio" id="carousel-2" name="carousel" aria-hidden="true" hidden="">
        <div class="carousel-item">
            <img src="../image/3.png">
        </div>
        <input class="carousel-open" type="radio" id="carousel-3" name="carousel" aria-hidden="true" hidden="">
        <div class="carousel-item">
            <img src="../image/4.png">
        </div>
        <input class="carousel-open" type="radio" id="carousel-4" name="carousel" aria-hidden="true" hidden="">
        <div class="carousel-item">
            <img src="../image/5.jpg">
        </div>
        <input class="carousel-open" type="radio" id="carousel-5" name="carousel" aria-hidden="true" hidden="">
        <div class="carousel-item">
            <img src="../image/6.jpg">
        </div>
        <label for="carousel-5" class="carousel-control prev control-1">‹</label>
        <label for="carousel-2" class="carousel-control next control-1">›</label>
        <label for="carousel-1" class="carousel-control prev control-2">‹</label>
        <label for="carousel-3" class="carousel-control next control-2">›</label>
        <label for="carousel-2" class="carousel-control prev control-3">‹</label>
        <label for="carousel-4" class="carousel-control next control-3">›</label>
        <label for="carousel-3" class="carousel-control prev control-4">‹</label>
        <label for="carousel-5" class="carousel-control next control-4">›</label>
        <label for="carousel-4" class="carousel-control prev control-5">‹</label>
        <label for="carousel-1" class="carousel-control next control-5">›</label>
        <ol class="instructions">
            <li>
                <label for="carousel-1" class="bullet"></label>
            </li>
            <li>
                <label for="carousel-2" class="bullet"></label>
            </li>
            <li>
                <label for="carousel-3" class="bullet"></label>
            </li>
            <li>
                <label for="carousel-4" class="bullet"></label>
            </li>
            <li>
                <label for="carousel-5" class="bullet"></label>
            </li>
        </ol>
    </div>

横向的元素在纵向排列的时候，怎么保证居中

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class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<div class="container">
    <div class="row">
        <div class="col-xs-12 col-sm-3 col-han">
            <div>
                <img src="media/rocket.png">
            </div>
            <h4>高效</h4>
            <p class="col-p">将五到七年的成长时间，缩短到一年到三年。</p>
        </div>
        <div class="col-xs-12 col-sm-3 col-han">
            <div>
                <img src="media/archive.png">
            </div>
            <h4>规范</h4>
            <p class="col-p">标准的实战教程，不会走弯路。</p>
        </div>
        <div class="col-xs-12 col-sm-3 col-han">
            <div>
                <img src="media/Shape-253.png">
            </div>
            <h4>人脉</h4>
            <p class="col-p">同班好友，同院学长，技术大师，入学就混入职脉圈，为以后铺平道路。</p>
        </div>

不能完美实现正方形

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九宫格

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

body{
	height: 100%;
	margin: 0;
	display: block;
	text-align: center;
}
html{
	
	height: 100%;
}
.hezi1{
	width: 30%;
	height: 30%;
	margin: 1%;
	border-radius: 15%;
	background-color: yellow;
	float: left;
}