css层

Posted 2023-06-10 liyiyang

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add.css

.overlay 
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;


.popup 
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    z-index: 1000;


.popup label 
    display: block;
    margin-bottom: 15px;


.popup label span 
    display: block;
    font-weight: bold;
    margin-bottom: 5px;


.popup input,
.popup select 
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;


.popup input[type="submit"] 
    background-color: #4CAF50;
    color: #fff;
    border: none;
    padding: 10px 16px;
    font-size: 16px;
    cursor: pointer;
    border-radius: 4px;

.popup textarea 
    width: 100%;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical; /* 允许垂直调整大小 */
    min-height: 100px; /* 设置最小高度 */



#closebtn 
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: transparent;
    border: none;
    font-size: 20px;
    color: #999;
    cursor: pointer;

textarea 
    text-align: left;
    white-space: pre-line;
    width: 100%;
    padding: 0px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical;
    font-family: Arial, sans-serif;
    font-size: 14px;
    color: #333;
    background-color: #f9f9f9;
    margin: 0px;


textarea:focus 
    outline: none;
    border-color: #666;
    box-shadow: 0 0 4px rgba(102, 102, 102, 0.3);

browse.css

/* 页面样式 */
body 
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;


/* 表格样式 */
table 
    border-collapse: collapse;
    width: 100%;
    margin: 20px 0;
    background-color: #fff;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);


th, td 
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;


th 
    background-color: #3f3f3f;
    color: #fff;


/* 输入框和按钮样式 */
input[type="text"] 
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-right: 10px;


button 
    padding: 8px 12px;
    background-color: #3f3f3f;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;


/* 开关按钮的样式 */
.switch 
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;


/* 开关按钮的input元素的样式 */
.switch input 
    opacity: 0;
    width: 0;
    height: 0;


/* 开关按钮的滑块的样式 */
.slider 
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .4s;
    transition: .4s;
    border-radius: 34px;


/* 开关按钮的滑块的样式当选中时 */
.slider:before 
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .4s;
    transition: .4s;
    border-radius: 50%;


/* 开关按钮的input元素选中时的样式 */
input:checked + .slider 
    background-color: #2196F3;


/* 开关按钮的input元素选中时滑块的样式 */
input:checked + .slider:before 
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);


img 
    border-radius: 50%;
    width: 100px;
    height: 100px;

.button 
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 10px;
    font-weight: bold;
    text-align: center;
    text-transform: uppercase;
    text-decoration: none;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: background-color 0.3s ease;


.button:hover 
    background-color: #0062cc;


.delete,.reset
    background-color: #dc3545;


.chose,.myStudent ,.myHomework,.myVideo
    background-color: #0080ff;


.delete:hover,.reset:hover 
    background-color: #c82333;

.chose:hover,.myStudent:hover,.myHomework:hover,.myVideo:hover 
    background-color: #0080ff;

.Id 
    text-decoration: none;
    color: #333;
    position: relative;
    display: inline-block;


.Id:before 
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #ff6600;
    visibility: hidden;
    transform: scaleX(0);
    transition: all 0.3s ease-in-out;


.Id:hover:before 
    visibility: visible;
    transform: scaleX(1);


.Id:hover 
    color: #ff6600;
    font-weight: bold;

#lab 
    float: right;
    margin-top: 10px;


#lab span 
    margin-right: 10px;
    font-weight: bold;
    color: #333;

#addlab 
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;


#addlab span 
    display: inline-block;


#addlab .plus 
    margin-left: 5px;

.addTea 
    background-color: #4CAF50; /* 设置背景颜色 */
    border: none; /* 去除边框 */
    color: white; /* 设置文字颜色 */
    padding: 3px 5px; /* 设置内边距 */
    text-align: center; /* 设置文字居中 */
    text-decoration: none; /* 去除下划线 */
    display: inline-block; /* 将按钮设为块级元素 */
    font-size: 7px; /* 设置字体大小 */
    margin: 4px 2px; /* 设置按钮之间的间距 */
    cursor: pointer; /* 设置光标为手型 */
    border-radius: 4px; /* 设置圆角 */
    transition-duration: 0.4s; /* 设置过渡时间 */


.addTea:hover 
    background-color: #3e8e41; /* 设置鼠标悬停时的背景颜色 */

select.Tea 
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f9f9f9;
    color: #333;
    font-size: 14px;
    width: 100px;


select.Tea option 
    padding: 5px;


.select-arrow 
    position: relative;
    top: 1px;
    right: 8px;
    pointer-events: none;
    border-style: solid;
    border-width: 0.15em 0.15em 0 0;
    content: \'\';
    display: inline-block;
    height: 0.45em;
    vertical-align: middle;
    width: 0.45em;
    transform: rotate(45deg);
    transition: all 0.3s ease-in-out;


.select-arrow::before 
    position: absolute;
    top: -0.3em;
    right: -0.3em;
    pointer-events: none;
    border-style: solid;
    border-width: 0.15em 0.15em 0 0;
    content: \'\';
    display: inline-block;
    height: 0.45em;
    vertical-align: middle;
    width: 0.45em;
    transform: rotate(90deg);
    transition: all 0.3s ease-in-out;


select.Tea:focus,
select.Tea:hover 
    outline: none;
    border-color: #999;


.select-arrow:hover 
    transform: rotate(135deg);


.select-arrow:hover::before 
    transform: rotate(225deg);

browseHomework.css

#addlab 
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;


#addlab span 
    display: inline-block;


#addlab .plus 
    margin-left: 5px;

body 
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;


.homework-container 
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: flex-start;
    margin-top: 20px;
    width: 100%;
    height: 100%;


.homework-item 
    flex: 0 0 15%; /* 控制每行显示的视频项数量，这里设置为每行显示4个 */
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin: 10px;
    padding: 10px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease-in-out;


.homework-item:hover 
    transform: scale(1.02);


.homework-item img 
    width: 100%;
    height: auto;
    border-radius: 4px;


.homework-item p 
    margin-top: 10px;
    font-size: 16px;
    font-weight: bold;
    color: #333;


.homework-item span 
    font-size: 30px;
    color: #888;

.delete-button 
    width: 40px;
    height: 40px;
    background-color: #ff5252;
    border: none;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);


.delete-button i 
    color: #fff;
    font-size: 20px;


.delete-button:hover 
    background-color: #ff0000;

.a 
    display: inline-block;
    padding: 10px;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
    transition: background-color 0.3s ease;

.a:hover 
    background-color: #ffffff;


#sp1 input[type="radio"] 
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid blue;

#sp2 input[type="radio"] 
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid gray;

#sp3 input[type="radio"] 
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid green;


#homeworkLab1 input[type="radio"]:checked 
    background-color: blue;


#homeworkLab1 input[type="radio"][value="1"]:checked 
    background-color: gray;


#homeworkLab1 input[type="radio"][value="1"]:checked + span 
    color: gray;


#homeworkLab1 input[type="radio"][value="2"]:checked 
    background-color: green;


#homeworkLab1 input[type="radio"][value="2"]:checked + span 
    color: green;



#homeworkLab2 input[type="radio"]:checked 
    background-color: blue;


#homeworkLab2 input[type="radio"][value="1"]:checked 
    background-color: gray;


#homeworkLab2 input[type="radio"][value="1"]:checked + span 
    color: gray;


#homeworkLab2 input[type="radio"][value="2"]:checked 
    background-color: green;


#homeworkLab2 input[type="radio"][value="2"]:checked + span 
    color: green;

#sp1
    color: blue;

#sp2
    color: gray;

#sp3
    color: green;

browseVideo.css

#addlab 
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;


#addlab span 
    display: inline-block;


#addlab .plus 
    margin-left: 5px;

body 
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;


.video-container 
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;
    align-items: flex-start;
    margin-top: 20px;
    width: 100%;
    height: 100%;


.video-item 
    flex: 0 0 25%; /* 控制每行显示的视频项数量，这里设置为每行显示4个 */
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin: 10px;
    padding: 10px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease-in-out;


.video-item:hover 
    transform: scale(1.02);


.video-item img 
    width: 100%;
    height: auto;
    border-radius: 4px;


.video-item p 
    margin-top: 10px;
    font-size: 16px;
    font-weight: bold;
    color: #333;


.video-item span 
    font-size: 14px;
    color: #888;

.delete-button 
    width: 40px;
    height: 40px;
    background-color: #ff5252;
    border: none;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);


.delete-button i 
    color: #fff;
    font-size: 20px;


.delete-button:hover 
    background-color: #ff0000;

.a 
    display: inline-block;
    padding: 10px;
    border-radius: 4px;
    text-decoration: none;
    color: #333;
    transition: background-color 0.3s ease;

.a:hover 
    background-color: #ffffff;

#lab 
    display: flex;
    align-items: center;
    justify-content: right;
    background-color: #f2f2f2;
    padding: 10px;
    border-radius: 5px;


#lab span 
    margin-right: 10px;
    font-weight: bold;


#condition 
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 3px;


#find,#find1 
    padding: 5px 10px;
    background-color: #4CAF50;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;


#find:hover,#find1:hover 
    background-color: #45a049;

changePwd.css

body 
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-image: url("https://starry-lixu.oss-cn-hangzhou.aliyuncs.com/202209141908599.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;


form 
    margin: 20px auto;
    max-width: 400px;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);


label 
    display: block;
    margin-bottom: 10px;
    font-weight: bold;


input[type="password"] 
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 3px;
    box-sizing: border-box;


input[type="submit"] 
    display: block;
    width: 100%;
    padding: 10px;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;


input[type="submit"]:hover 
    background-color: #0056b3;


input[type="submit"]:focus 
    outline: none;

detail.css

body 
    font-family: Arial, sans-serif;
    background-image: linear-gradient(to bottom, #e0eaf1, #f5f5f5);
    padding: 20px;
    box-sizing: border-box;


header 
    text-align: center;
    margin-bottom: 30px;


h1 
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 10px;



table 
    width: 100%;
    border-collapse: collapse;
    margin-top: 30px;


th, td,input 
    padding: 10px;
    border: 1px solid #ccc;
    text-align: center;


th 
    font-weight: bold;
    background-color: #f2f2f2;


.active 
    color: green;


.inactive 
    color: red;

img 
    border-radius: 50%;
    width: 100px;
    height: 100px;

function.css

@charset "utf-8";
/* CSS Document */

body 
    font-family: "Lato", sans-serif;
    transition: background-color .5s;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-image: url("https://picsum.photos/1920/1080");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

#openbtn 
    font-size: 30px;
    cursor: pointer;
    background: linear-gradient(45deg, #ff00ff, #00ffff);
    border: none;
    color: #fff;
    padding: 10px 20px;
    border-radius: 20px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
    transform: perspective(100px) rotateX(10deg);


#openbtn:hover 
    transform: perspective(100px) rotateX(0deg) scale(1.1);
    box-shadow: 0px 8px 20px rgba(0, 0, 0, 0.3);


/*侧边栏选择器*/
.sidenav 
    height: 100%;
    width: 0; /*原始宽度*/
    position: fixed;
    /*z-index、top、left共同控制侧栏的悬浮（上方1，下方-1）*/
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s; /*侧栏延迟0.5s显示*/
    padding-top: 60px;


/*侧边栏标签选择器*/
.sidenav a 
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s; /*标签延迟0.3s显示*/


/*侧栏标签和关闭按钮光标的效果*/
.sidenav a:hover, .offcanvas a:focus
    color: #f1f1f1;


/*侧栏和关闭按钮的位置选择器*/
.sidenav .closebtn 
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;


/*主体内容*/
#main 
    transition: margin-left .5s;/*主体内容延迟0.5s整体y右移动*/
    padding: 16px;


/*当文档高度小于450px时，改变侧栏的padding属性和字体大小*/
@media screen and (max-height: 450px) 
    .sidenav padding-top: 15px;
    .sidenav a font-size: 18px;

.user-info 
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
    float: right;


.user-info img 
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 10px;


.user-name 
    font-size: 24px;
    cursor: pointer;
    color: #8c00ff;
    -webkit-text-stroke: 2px #00ffff;


header 
    text-align: center;
    margin-top: 50px;


h1 
    font-size: 48px;
    cursor: pointer;
    background: linear-gradient(45deg, #ff00ff, #00ffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;



section iframe 
    display: block;
    width: 70%;
    height: 800px;
    margin: 20px auto;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    border-radius: 2px;
    object-fit: cover;

aside 
    position: absolute;
    left: 0;
    top: 5%;
    background-color: rgba(255, 255, 255, 0.49);
    padding: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    border-radius: 5px;

homeworkDetail.css

body 
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;


.homework 
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border: 2px solid lightblue; /* 添加这一行 */
    background-color: lightblue; /* 添加这一行 */


.homework h1 
    color: #333;
    font-size: 24px;
    text-align: center;


.homework p 
    color: #666;
    font-size: 16px;
    line-height: 1.5;


.homework img 
    display: block;
    max-width: 100%;
    height: auto;
    margin: 10px auto;


.answer-container 
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border: 2px solid lightblue;
    background-color: lightblue;


.answer-container h1 
    color: #333;
    font-size: 24px;
    text-align: center;


.answer-item 
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    flex-direction: column;
    background-color: white;
    border: 2px solid rgba(255, 255, 255, 0.49);


.avatar 
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin-right: 20px;
    border: 2px solid gray;


.stuAnswer 
    width: 300px;
    height: auto;
    margin: 0 auto;

.an_score 
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 300px;
    margin: 10px auto;


.an_score input[type="text"] 
    border: 1px solid black;
    padding: 5px;


.an_score input[type="submit"] 
    border: none;
    border-radius: 20px;
    background-color: #0080ff;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    cursor: pointer;

login.css

body 
    background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;


@keyframes gradient 
    0% 
        background-position: 0% 50%;
    
    50% 
        background-position: 100% 50%;
    
    100% 
        background-position: 0% 50%;
    

form 
    background-image: url("../img/login.jpg");
    background-size: cover;
    padding: 20px;
    border: 1px solid #ccc;
    margin: auto;
    width: 40%;
    height: 20%;
    padding: 20px;
    border-radius: 5px;



h1 
    text-align: center;
    font-size: 40pt;
    font-family: Arial, Helvetica, sans-serif;
    color: #333;


label 
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20pt;
    color: #555;


input[type="text"], input[type="password"], select 
    display: block;
    margin: 10px 0;
    width: 100%;
    padding: 10px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20pt;
    color: #333;
    border: 1px solid #ccc;
    border-radius: 5px;

input[type="submit"] 
    margin: 30px auto;
    padding: 20px;
    background-color: #4CAF50;
    width: 100%;
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20pt;
    border: none;
    border-radius: 50px;
    cursor: pointer;


input[type="submit"]:hover 
    background-color: #3e8e41;


#id, #pwd 
    width: 100%;

register.css

form 
    margin: auto;
    width: 40%;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background: white;


label 
    display: block;
    margin: 10px 0;
    font-weight: bold;
    font-size: 15pt;


input[type="text"], input[type="password"], select, input[type="file"] 
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    width: 100%;
    box-sizing: border-box;


input[type="radio"] 
    margin-right: 10px;


input[type="submit"],input[type="button"] 
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;


input[type="submit"]:hover,input[type="button"]:hover 
    background-color: #3e8e41;

body 
    background: linear-gradient(-45deg, #EE7752, #E73C7E, #23A6D5, #23D5AB);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;


@keyframes gradient 
    0% 
        background-position: 0% 50%;
    
    50% 
        background-position: 100% 50%;
    
    100% 
        background-position: 0% 50%;
    

select
    font-size: 15pt;

stuHomworkDetail.css

body 
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;


.homework,.myAnswer 
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border: 2px solid lightblue; /* 添加这一行 */
    background-color: lightblue; /* 添加这一行 */


.homework h1 
    color: #333;
    font-size: 24px;
    text-align: center;


.homework p 
    color: #666;
    font-size: 16px;
    line-height: 1.5;


.homework img 
    display: block;
    max-width: 100%;
    height: auto;
    margin: 10px auto;


form 
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ccc;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    overflow: hidden;


form label 
    color: #333;
    font-size: 16px;


form input[type="file"] 
    width: 300px;
    height: auto;
    border-radius: 5px;
    border: none;
    background-color: lightblue;
    cursor: pointer;


form input[type="submit"] 
    width: 100px;
    height: auto;
    border-radius: 5px;
    border: none;
    background-color: lightgreen;
    cursor: pointer;

videodetail.css

body 
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;


header 
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: left;


h1 
    margin: 0;


section 
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;


div 
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    flex-direction: column;


video 
    width: 100%;
    max-width: 600px;
    height: auto;


span 
    font-size: 18px;
    color: #888;
    margin-top: 10px;
    text-align: left;


p 
    font-size: 16px;
    color: #333;
    margin-top: 10px;
    text-align: left;

css 问题如何使子层背景覆盖父层背景

css 问题如何使子层背景覆盖父层背景
<div style="background:url(catalog/view/theme/yaprak/image/ic.png); height:39px; width:960px;">
<div style="background:url(catalog/view/theme/yaprak/image/sol.png); height:39px; height:39px; width:10px "></div>
<div>

在父层的父层，增加一个position:relative;即可，然后保证子层的z-index的大小超过父层即可。参考技术A 既然是父子关系，那么不需要z-index的
只要子div设置的背景，就会覆盖掉父div的本回答被提问者采纳参考技术B 子层的背景会自动覆盖父层的背景的，你最后一个div少了斜杠/ 参考技术C 子层CSS样式设置z-index:1;父层z-index:0; 参考技术D 不用设z-index 这样就可以，

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