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Question

當我使用W3C CSS驗證，我得到這個錯誤：

我的CSS是這樣的：

.sample{ 

    width:20%; 
    float:left; 
    clear:none; 
    margin:0 3.6% 3.5% 0; 
    } 

.samplebottom{ 

    width:100%; 
    float:left; 
    height:65px; 
    } 
.samplebottom h3{ 

    float:right; 
    clear:both; 
    margin:5px 0 0 0; 
    color:#000; 
    font:15px "B Nazanin"; 
    font-weight:bold ; 
    } 
.sampa{ 

    float:right; 
    width:100%; 
    clear:both; 
    color:#999 !important; 
    font:13px arial; 
    } 
.tpl6 .bg{ 

    height:100%; 
    width:100%; 
    background:url(../images/bg13.png) repeat; 
    text-align:center; 
    border-radius:5px; 
} 

.tpl6 .bg img { 

    width:20%; 
    float:right; 
    margin:68% 40% 0 0; 
    } 

.he-wrap{ 

    position:relative; 
    display:inline-block; 
    } 

.he-view,.he-zoom{ 

    position:absolute; 
    top:0; 
    left:0; 
    right:0; 
    bottom:0; 
    overflow:hidden; 
    visibility:hidden 
    } 

.he-view-show{ 

    visibility:visible 
    } 

.a0{ 

    -webkit-animation-fill-mode:both; 
    -moz-animation-fill-mode:both; 
    -ms-animation-fill-mode:both; 
    -o-animation-fill-mode:both; 
    animation-fill-mode:both; 
    -webkit-animation-duration:.6s; 
    -moz-animation-duration:.6s; 
    -ms-animation-duration:.6s; 
    -o-animation-duration:.6s; 
    animation-duration:.6s 
    } 

@-webkit-keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 

@-moz-keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 

@-o-keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 

@keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 


.fadeIn{ 

    -webkit-animation-name:fadeIn; 
    -moz-animation-name:fadeIn; 
    -o-animation-name:fadeIn; 
    animation-name:fadeIn 
    } 

and the error is about these codes : 

@-webkit-keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 

@-moz-keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 

@-o-keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 

@keyframes fadeIn{0%{opacity:0}100%{opacity:1}} 

我怎樣才能糾正驗證錯誤？

Answer 1

像這樣的前綴不在W3C規範中，它們是瀏覽器特有的，所以在運行W3C驗證時你總是會有這樣的東西。對於任何瀏覽器特定的CSS黑客也是如此。