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爲什麼當我向CSS（.heading { }）中的標題聲明一個字體系列時，文本會在輸出中消失？爲什麼當我添加字體系列時，文本會消失？
前： Before font-family declaration
後： After font-family declaration
另一個類似，但陌生人問題與FONT-FAMILY聲明的是，添加了聲明之後的文字不會堅持以保證金，填充和邊框規格，並且會與浮動的<div>重疊。即使該行被刪除，該問題仍將持續存在，並且只有使用「ctrl + Z」反轉文件時纔會修復該問題。
代碼：
* {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.clearfix {
\t overflow: auto;
}
@page{
\t size: 7in 9.25in;
\t margin: 27mm 16mm 27mm 16mm; \t
}
#margin {
\t max-width: 90%;
\t margin: 0 auto;
}
.sectionHeadingIndent {
\t background-color: black;
\t border: black;
\t float: left;
\t width: 5%;
\t height: 100%;
\t position: absolute;
}
***Font-family declaration below here***
.heading {
\t margin-left: 5%;
\t padding-left: 1%;
\t margin-bottom: 0;
\t padding-bottom: 0;
\t border-bottom-style: none;
\t font-family: Courier;
}
.header {
\t position: relative
}
.header_firstLine {
\t position: relative;
\t margin-bottom: 0;
\t padding-bottom: 0;
\t border-bottom-style: none;
}
.header_secondLine {
\t position: relative;
\t margin-left: 5%;
\t padding-left: 1%;
\t margin-top: 0;
\t padding-top: 0;
\t line-height: 1;
\t border-top-style: none;
}
#introduction {
\t height: 20%;
}
.Subhead {
\t display: inline-block;
}
#objective_summary{
\t width: 30%;
\t margin: 10% auto;
}
<!-- Page boundary div -->
<div>
\t <!-- Margins div -->
\t <div id = "margin" >
\t \t <section id = "introduction">
\t \t <!-- Introduction section -->
\t \t \t <div class = "header">
\t \t \t \t <div class = "header_firstLine">
\t \t \t \t \t <!-- For indent and Name -->
\t \t \t \t \t <div class = "sectionHeadingIndent"></div>
\t \t \t \t \t <h1 class = "heading", style = "arial">H1</h1>
\t \t \t \t </div>
\t \t \t \t <div class = "header_secondLine clearfix">
\t \t \t \t \t <!-- For Contact Information -->
\t \t \t \t \t <div class = "Subhead">
\t \t \t \t \t \t Subheading
\t \t \t \t \t </div>
\t \t \t \t </div>
\t \t \t <div id = "objective_summary">
\t \t \t \t Text
\t \t \t </div>
\t \t </section>
\t \t <section>
\t \t <!-- on Section -->
\t \t \t <div class = "header">
\t \t \t \t <div class = "sectionHeadingIndent"></div>
\t \t \t \t <h2 class = "heading">H2</h2>
\t \t \t </div>
\t \t \t <div>
\t \t \t \t <div class = "on_ce">
\t \t \t \t \t <div class = "on_name">
\t \t \t \t \t \t Text
\t \t \t \t \t </div>
\t \t \t \t \t <div class = "on_place">
\t \t \t \t \t \t Text
\t \t \t \t \t </div>
\t \t \t \t </div>
\t \t \t </div>
\t \t </section>
\t </div>
</div>
我從代碼中刪除了「***下面的***字體家族聲明***」，並且一切似乎都正常工作。在css中使用註釋時，應該如下所示：/ *這是註釋*/ – trav
謝謝，我不知道。 – kishan
不用擔心@ kishan！ – trav