我正在建立我的第一個現場網站,我注意到背景圖像沒有隨着窗口的縮小而縮小。該網站的其餘部分縮放,但背景圖像看起來好像它的全屏。我只能假設這意味着它不會完全可見,但會在較小的設備中被切斷。是什麼導致這種情況發生,我該如何解決?這種幫助將不勝感激,謝謝如何讓我的CSS背景圖像與窗口大小一起縮放?
我剛剛發佈整個網站無響應的一部分共享我的CSS的通用部分,但其餘的是在的jsfiddle https://jsfiddle.net/zd00nmce/5/
html,body{
min-height: 100vh;
}
body{
margin: 0px;
background-image: linear-gradient(0, rgba(0,0,0,.8) 30%, rgba(0,150,255,.8) 100%), url("images/mainCover.jpg");
background-repeat: no-repeat;
background-size: cover;
}
img{
max-width: 100%;
}
h1,h2,h3{
font-family: arial;
text-align: center;
margin: 20px auto;
}
ul{
list-style: none;
text-align: center;
padding: 0;
}
a:visited,a{
color: black;
}
section{
margin: 5%;
color: white;
}
section > article{
padding: 1em;
background-color: rgba(0,0,0,.5);
border-radius: 15px;
margin: 10px;
}
section h2, section h3{
text-align: center;
}
section h2{
font-size: 1.3em;
text-shadow: 3px 3px 3px rgba(0,0,0,.5);
}
section h3{
font-size: 1.1em;
}
/*nav and header*/
header{
background-color: rgba(255,165,0,.8);
display: flex;
flex-flow: row wrap;
justify-content: center;
border-bottom: 8px solid black;
}
header h1{
text-align: center;
margin: 0;
padding: 15px;
font-size: 1.5em;
text-shadow: 5px 5px 5px rgba(0,0,0,.3);
}
header h1, nav a{
font-weight: 700;
font-family: arial;
}
header nav{
position: fixed;
bottom: 0;
width: 100%;
z-index: 1;
// background-color: rgba(255,165,0,.8);
}
.main-nav{
margin: 0;
width: 100%;
color: white;
font-family: arial;
font-weight: 600;
}
nav ul li{
text-align: center;
border: 1px solid white;
border-radius: 15px;
font-size: 1.2rem;
background-color:rgba(255,165,0,.8);
width: 100%;
}
.drop-menu-back{
display: none;
width: 100%;
}
a{
text-decoration: none;
}
nav a:visited, nav a,h1{
color: white;
}
.main-nav .current-page {
background-color: rgba(0,0,0,.5);
}
/****drop down menu****/
.characters:hover {
position: relative;
border-radius: 8px 8px 0 0;
}
.drop-menu{
position: absolute;
visibility: hidden;
display: block;
top: 38px;
white-space: nowrap;
left: -2px;
background-color: rgba(255,165,0,.8);
border: 1px solid rgba(0,0,0,.02);
box-shadow: 5px 5px 5px 2px rgba(0,0,0,.3);
opacity: 0;
transition: opacity 300ms ease-in-out 0s;
z-index: 1;
}
.characters:hover .drop-menu{
visibility: visible;
opacity:1;
}
請將您的示例代碼簡化爲[最小,完整和可驗證的示例](https://stackoverflow.com/help/mcve),並解釋您試圖實現的目標,而不是實現目標。 *即*看起來您希望背景圖像「縮小」以適合,但是應該如何在電話上查看*例如*肖像;是圖像寬度和寬高比的優先級,還是背景覆蓋率;如果圖像保持完全可見或裁剪可接受*等*? –