我的媒体查询不会覆盖常规CSS,除非我一直使用！important.错误是什么？在这里你可以看到带有！importants的CSS.如果我删除它们,样式会回到常规CSS,即使屏幕小于850px.能否请你帮忙？
@media all and (min-width: 200px) and (max-width: 850px) {
html body {
position: absolute;
height: 100%;
width: 100% !important;
margin: 0 auto;
text-align:center;
}
#header {
background-color: white;
position: fixed;
top: 0px;
Box-shadow: 0 3px 6px rgba(0,0.16),0 3px 6px rgba(0,0.23);
width: 95%;
height: 120px;
z-index:9999;
}
#header-inner{
width: 100% !important;
float: right;
}
div#title {
margin: 0px !important;
position: absolute;
width: 100% !important;
height: 70px;
background: url('mobillogo.png');
background-repeat: no-repeat;
background-size: auto 70px;
}
.wrapper {
width: 100% !important;
overflow:auto;
margin-left: auto;
margin-right: auto;
}
#first {
padding-top: 150px;
padding-bottom: 30px;
overflow:auto;
width: 95%;
background-color: #f7fdff;
height: ;
}
#second {
margin-top: 65px;
overflow: auto;
width: 95% !important;
margin-bottom: 65px;
background-color: white;
}
#third {
overflow:auto;
width: 95% !important;
background-color: #f3efef;
padding-bottom: 4em;
}
#footer
{
height: 115px;
width:100% !important;
Box-shadow: 0 10px 20px rgba(0,0.19),0 6px 6px rgba(0,0.23);
background-color: white;
padding-top: 1em;
padding-bottom: 0.5em;
}
#footBox {
height: 70px;
width: 100% !important;
margin-top: 0px;
margin-bottom: 10px;
margin-left: auto;
margin-right: auto;
}
#contains {
width: 100% !important;
margin-top: 50px;
}
h1 {
float: left;
width: 100% !important;
margin-top: 2em;
font-family: Jersey;
font-size: 3.5em;
text-align: center;
color: #f44336;
}
#logo {
margin-top:70px !important;
width: 100% !important;
height: 70px;
}
div#logo img {
position: static !important;
height: 13vw !important;
}
#footBox {
height: 70px;
width: 95%;
margin-top: 0px;
margin-bottom: 10px;
margin-left: auto;
margin-right: auto;
}
#checklist {
overflow: auto;
position: relative;
float: left;
width: 100% !important;
font-family: 'Open Sans',sans-serif;
padding-bottom: 8vh;
padding-top: 15px;
text-align:left;
}
#short {
width: 100% !important;
color: black;
font-weight: bold;
font-size: 1.3em;
margin: 0px !important;
}
#form {
overflow: auto;
border-radius: 5px;
padding: 0px !important;
position: relative;
width: 100% !important;
display: inline-block;
-webkit-transition:background 0.3s;
-moz-transition:background 0.3s;
-o-transition:background 0.3s;
transition:background 0.3s;
transition-timing-function: ease-in-out;
}
ul.inline {
width: 100% !important;
list-style-type: none;
columns: 1 !important;
-webkit-columns: 1 !important;
-moz-columns: 1 !important;
list-style-position: inside;
padding: 0px;
margin: 0px;
}
#fulltext {
width: 90%;
padding-right: 30px;
}
.text {
width: 75% !important;
}
}
html body {
position: absolute;
height: 100%;
width: 100%;
margin: 0 auto;
text-align:center;
}
@font-face {
font-family: Jersey; src: url('Jersey M54.ttf');
}
p {
font-family: 'Open Sans',sans-serif;
text-align:left;
}
.lightup {
background-color: #ffc107;
}
button {
float: right;
margin-right: 10px;
font-size: 1.2em;
background: #5fbd5f;
color: white;
padding: 5px;
font-family: 'Open Sans',sans-serif;
color: white;
padding: 5px;
padding-left: 10px;
padding-right: 10px;
border: 0;
outline: none;
Box-shadow: 0 3px 6px rgba(0,0.23);
}
button:hover {
cursor: pointer;
cursor: hand;
}
button:active{
border: 0;
outline: none;
Box-shadow: 0 1px 3px rgba(0,0.12),0 1px 2px rgba(0,0.24);ű
}
a,u {
text-decoration: none;
}
#header-inner{
width: 1100px;
float: right;
}
#header {
background-color: white;
position: fixed;
top: 0px;
Box-shadow: 0 3px 6px rgba(0,0.23);
width: 100%;
height: 120px;
z-index:9999;
}
.wrapper {
overflow:auto;
width: 1100px;
margin-left: auto;
margin-right: auto;
}
#first {
padding-top: 150px;
padding-bottom: 30px;
overflow:auto;
width: 100%;
background-color: #f7fdff;
height: ;
}
#second {
margin-top: 65px;
overflow: auto;
width: 100%;
margin-bottom: 65px;
background-color: white;
}
#third
{
overflow:auto;
width: 100%;
background-color: #f3efef;
padding-bottom: 4em;
}
#footer
{
height: 115px;
width:100%;
Box-shadow: 0 10px 20px rgba(0,0.23);
background-color: white;
padding-top: 1em;
padding-bottom: 0.5em;
}
#footBox {
height: 70px;
width: 1100px;
margin-top: 0px;
margin-bottom: 10px;
margin-left: auto;
margin-right: auto;
}
#contains {
width: 100%;
margin-top: 50px;
}
#toTop {
clear:both;
width: 600px;
Box-shadow: 0 3px 6px rgba(0,0.23);
font-family: 'Bree Serif',serif;
color: white;
border-radius: 5px;
background: #f44336;
padding-left: 15px;
padding-right: 15px;
font-size: 70px;
}
#logo {
float:left;
margin-top:1em;
}
h1 {
position: relative;
vertical-align: text-top;
margin-top: -12px;
font-family: Jersey;
font-size: 3.5em;
text-align: right;
color: #f44336;
}
h4 {
margin-top: 0px;
margin-bottom: 0;
font-family: Jersey;
font-size: 2em;
text-align: center;
color: white;
}
h5 {
position:relative;
float:left;
font-family: 'Open Sans',sans-serif;
color: #f44336;
font-size: 37px;
padding:5px;
width:250px;
margin-top: -15px;
margin-bottom: 0px;
margin-left: auto;
margin-right: auto;
text-align: right;
}
#purple {
text-align: center;
vertical-align: middle;
margin-top: 10px;
position:relative;
padding-right: 15px;
}
.caltxt {
padding-top: 0px;
padding-left: 15px;
font-size: 1em;
color: white;
}
#calendar {
margin-bottom: 5em;
margin-left: 80px;
float: left;
width: 600px;
height: 400px;
}
#sept {
float: left;
position: relative;
width: 25%;
height: 100%;
background-color: #4caf50;
}
#oct {
float: left;
position: relative;
width: 25%;
height: 75%;
background-color: #f44336;
}
#nov {
float: left;
position: relative;
width: 25%;
height: 75%;
background-color: #266fea;
}
#dec {
float: left;
position: relative;
width: 25%;
height: 75%;
background-color: #ffc107;
}
#plus {
float: left;
position: relative;
width: 75%;
height: 25%;
background-color: #9c27b0;
z-index: 0;
}
.calendar {
-webkit-transition: all 250ms;
-moz-transition: all 250ms;
transition: all 250ms;
}
.calendar:hover {
z-index: 9998;
Box-shadow: 0 19px 38px rgba(0,0.30),0 15px 12px rgba(0,0.22);
-webkit-transform: translateY(-5px);
-moz-transform: translateY(-5px);
transform: translateY(-5px);
}
div#title {
margin-top: 50px;
position: absolute;
width: 1100px;
height: 70px;
background: url('weblogo.png');
background-repeat: no-repeat;
background-position: 0px;
background-size: auto 70px;
}
#checklist {
overflow: auto;
position: relative;
float: left;
width: 750px;
font-family: 'Open Sans',sans-serif;
padding-bottom: 8vh;
padding-top: 15px;
text-align:left;
}
#short {
width: 750px;
color: black;
font-weight: bold;
font-size: 1.3em;
}
#form {
overflow: auto;
border-radius: 5px;
padding: 15px;
position: relative;
width: 260px;
display: inline-block;
-webkit-transition:background 0.3s;
-moz-transition:background 0.3s;
-o-transition:background 0.3s;
transition:background 0.3s;
transition-timing-function: ease-in-out;
}
.text {
width: 90%;
text-align: left;
padding: 5px;
margin-top: 0px;
margin-bottom: 5px;
font-family: 'Open Sans',sans-serif;
border: 1px solid grey;
border-radius: 5px;
}
#fulltext {
width: 90%;
padding-right: 30px;
}
#name {
background: url(profile.png) no-repeat scroll 5px 5px;
background-color: white;
background-size: 20px;
margin-top: auto;
margin-bottom: auto;
padding-left:30px;
margin-bottom: 10px;
}
#email {
background: url(message.png) no-repeat scroll 5px 8px;
background-color: white;
background-size: 20px;
margin-top: auto;
margin-bottom: auto;
padding-left:30px;
margin-bottom: 10px;
}
#university {
background: url(university.png) no-repeat scroll 5px 4px;
background-color: white;
background-size: 20px;
margin-top: auto;
margin-bottom: auto;
padding-left:30px;
margin-bottom: 10px;
}
h3 {
font-family: 'Bree Serif',serif;
width: 130px;
color: white;
border-radius: 5px;
background: #f44336;
padding: 5px;
}
#textBox{
width: 90%;
height: 5em;
}
#textBox::-webkit-input-placeholder{
color:transparent;
}
#textBox::-webkit-input-placeholder::before {
color:#666;
content:"program?*";
}
h2 {
font-weight: bold;
font-size: 1em;
font-family: 'Open Sans',sans-serif;
}
ul.inline {
list-style-type: none;
columns: 2;
-webkit-columns: 2;
-moz-columns: 2;
list-style-position: inside;
padding: 0px;
margin: 0px;
}
ul.inline li {
padding: 5px;
background-image: url(check.png);
background-repeat: no-repeat;
background-size: 25px;
background-position: 0px center;
padding-left: 25px;
}
#fun {
float: left;
padding-bottom: 50px;
}
#creativity {
padding-bottom: 80px;
}
#community {
float: left;
margin-left: 75px;
}
#innovation {
float: left;
margin: 30px;
}
#challenge {
float: left;
margin-left: 100px;
margin-top: -25px;
margin-bottom: 5em;
height: 220px;
}
#csanad {
height: 130px;
float: left;
margin-left: 5%;
margin-top: 4%;
padding-bottom: 80px;
}
#adam {
height: 130px;
float: left;
margin-left: 0%;
margin-top: 70px;
}
#adamtxt {
font-size: 0.9em;
width: 61%;
float:left;
margin-top: 72px;
margin-left: 25px;
}
#rapper {
width:400px;
float: left;
}
#csanadtxt {
font-size: 0.9em;
width: 32%;
float:left;
margin-top: 4%;
margin-left: 25px;
}
#noura {
height: 130px;
float: left;
margin-left: 15px;
margin-top: 75px;
}
#nouratxt {
font-size: 0.9em;
width: 23%;
float:left;
margin-top: 80px;
margin-left: 25px;
}
#container {
}
div#logo img {
position: absolute;
height: 25px;
}
#menu{
position: relative;
padding: 0px;
float: right;
}
ul#menu li {
list-style: none;
display: inline-block;
font-size: 0.95em;
height: 1vw;
}
ul#menu li a {
padding: 5px;
padding-left: 0.45vw;
padding-right: 0.45vw;
color: #ff4412;
font-family: 'Open Sans',sans-serif;
outline: none;
text-transform: uppercase;
border-radius: 5px;
}
div#container div#header div#header-inner ul#menu li a:focus {
text-decoration: none;
}
div#container div#header div#header-inner ul#menu li a:hover {
background: #ff4412;
color: white;
text-decoration: none;
}
div#container div#header div#header-inner ul#menu li.highlight a {
color: white;
border-radius: 5px;
background: #ff4412;
}
div#container div#header div#header-inner ul#menu li.highlight:hover {
opacity: 0.9;
}
最佳答案
说明
浏览器如何看到你的CSS！重要：
for screen 200px < x < 800px do this {
bla bla bla
}
but... wait a second.. forget about it,do this for all screens {
bla bla bla
}
当你添加！important时,浏览器会像这样：
for screen 200px < x < 800px do this {
bla bla bla
!do not listen to me if I will ever give you any other instructions
}
but... hey dude,want any instructions? Can you do this for all screens? {
bla bla bla
}
如果您将@media块放在文件的末尾并删除所有！important,它将如下所示：
for all screens do this {
bla bla bla
}
but for screens 200px < x < 800px do this {
bla bla bla
}
演示
@media (max-width: 800px) {
.bad {
background-color: green;
}
}
.bad,.good {
width: 100px;
height: 100px;
background-color: firebrick;
}
@media (max-width: 800px) {
.good {
background-color: green;
}
}
原文链接：https://www.f2er.com/css/427377.html