我的背景图像未出现在github页面上。我已经尝试了一切，但仍然无法正常工作。
background-image: url("images/img1.jpg");
这是我的原始代码，我尝试这样做：
background-image: url("../images/img1.jpg"); and background-image: url("/images/img1.jpg");
但两者都不起作用。我的CSS和JS完全可以正常工作。所以我真的不知道为什么它不起作用。
https://github.com/jxvicinema/physical-chemistry这里是回购感谢
答案 0 :(得分：0)
* {
margin: 0;
padding: 0;
-webkit-box-sizing: 0;
box-sizing: 0;
}
body {
font-family: "Slabo 27px", serif;
background: #f8f8f8;
}
.bold {
font-weight: 700px;
}
.sm {
font-size: 1.5rem;
}
.red {
color: #ae0001;
}
.yellow {
color: #eeba30;
}
.banner-container {
text-align: center;
color: #fff;
height: 100vh;
position: relative;
background: rgba(0, 0, 0, 0.6);
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
-webkit-box-orient: vertical;
-webkit-box-direction: normal;
-ms-flex-direction: column;
flex-direction: column;
}
.banner-container h1 {
font-size: 4.5rem;
margin-bottom: 0.8rem;
}
.banner-container p {
font-size: 2.5rem;
margin-bottom: 1rem;
}
.banner-container i {
padding: 0.5rem;
color: #fff;
background: rgba(0, 0, 0, 0.9);
border-radius: 50%;
}
.banner-container i:hover {
background: #42d98f;
color: #000;
}
.banner-container:before {
content: "";
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100vh;
background-image: url("../images/img1.jpg");
background-position: center;
background-size: cover;
background-repeat: no-repeat;
z-index: -1;
}
.question-container,
.answer-container {
padding: 1rem;
max-width: 1100px;
margin: auto;
text-align: center;
height: 100vh;
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
-webkit-box-orient: vertical;
-webkit-box-direction: normal;
-ms-flex-direction: column;
flex-direction: column;
}
.question-container p,
.answer-container p {
font-size: 2.2rem;
letter-spacing: 2px;
line-height: 1.5;
margin-bottom: 2rem;
}
.question-container i,
.answer-container i {
padding: 0.5rem;
color: #fff;
background: rgba(0, 0, 0, 0.9);
border-radius: 50%;
}
.question-container i:hover,
.answer-container i:hover {
background: #42d98f;
color: #000;
}
.end-banner {
height: 25vh;
background-color: rgba(27, 90, 60, 0.9);
color: #fff;
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-webkit-box-pack: center;
-ms-flex-pack: center;
justify-content: center;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
}
.end-banner h3 {
font-size: 3.5rem;
letter-spacing: 5px;
margin: 1rem;
}
@media (max-width: 500px) {
.answer-container p {
font-size: 1.8rem;
}
}
/*# sourceMappingURL=style.css.map */<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Jerns</title>
<link rel="stylesheet" href="https://unpkg.com/aos@next/dist/aos.css" />
<script
src="https://kit.fontawesome.com/c7414cb6d4.js"
crossorigin="anonymous"
></script>
<link
href="https://fonts.googleapis.com/css?family=Slabo+27px&display=swap"
rel="stylesheet"
/>
<link rel="stylesheet" href="styles/style.css" />
</head>
<body>
<header>
<div class="banner-container">
<h1>Physical Chemistry</h1>
<p>Nicole Hernaez</p>
<a href="#sc1" ><i class="fas fa-chevron-down fa-2x"></i></a>
</div>
</header>
<section>
<div class="question-container" id="sc1">
<p data-aos="fade-left">
<span>Q.67</span> Is it always possible to normalize a wavefunction by
multiplying it by an appropriate constant?
</p>
<a href="#sc2"><i class="fas fa-chevron-down fa-2x"></i></a>
</div>
</section>
<section>
<div class="answer-container" id="sc2">
<p data0aos="fade-right">Normalization Condition:<p>
<p data-aos="fade-right">
To normalize a wavefunction, it should be multiplied by an appropriate
constant (other than zero) such that the sum of probability to find
the particle over entire space is 1:
</p>
<a href="#sc3"><i class="fas fa-chevron-down fa-2x"></i></a>
</div>
</section>
<section>
<div class="answer-container " id="sc3">
<p data-aos="fade-left" >(1) ∫ <sup>∞</sup>-∞ | Ψ (x) |² dx = 1, <span class="sm"> where | Ψ(x)|² = ( Ψ*(x)) ( Ψ(x))</span> </p>
<p data-aos="fade-left">multiplying an Appropriate Constant (A) to Ψ(x) such that</p>
<p data-aos="fade-left"> ∫ 1 Ψ(x)|²dx = ∫ |A Ψ(x)|² dx = A²∫1Ψ(x)|² dx = 1</A></p>
<a href="#sc4"><i class="fas fa-chevron-down fa-2x"></i></a>
</div>
</section>
<section>
<div class="answer-container" id="sc4">
<p data-aos="faded-right">To find the normalization constant (A)</p>
<p data-aos="faded-right">A² ∫ 1 Ψ(x)|² dx = 1 | </p>
<p data-aos="faded-right">A² B = 1</p>
<p data-aos="faded-right">A² = <sup>1</sup> ⁄<sub>B</sub> </p>
<p data-aos="faded-right">A = <sup>1</sup>⁄<sub>√B</sub></p>
<p data-aos="faded-right">So, assuming that the integral ∫1 Ψ(x)|² dx = B can be calculated,</p>
<p data-aos="faded-right">Ψ(x) is normalized if it is multiplied by <sup>1</sup>⁄<sub>√B</sub></p>
<a href="#sc5"><i class="fas fa-chevron-down fa-2x"></i></a>
</div>
</section>
<section>
<div class="answer-container" id="sc5">
<p data-aos="faded-left"> <span class="yellow"> However it is not always possible to normalize a wavefunction by multiplying it by an appropriate constant.</span></p>
<p data-aos="faded-left">For instance, <span class="red"> a plane wave function</span></p>
<p data-aos="faded-left">Ψ(x,t) = >Ψ e <sup>i(kx-wt)</sup></p>
<a href="#sc6"><i class="fas fa-chevron-down fa-2x"></i></a>
</div>
</section>
<section>
<div class="answer-container" id="sc6">
<p data-aos="faded-right">The integral of its square over all space yields <span class="yellow"> infinity</span>. In quantum mechanics, normalization of a wavefunction requires the integral to <span class="yellow"> be equal to 1.</span> <span class="red"> There is no any complex number that can be used to multiply infinity to make it equal to one.</span></p>
<a href="#sc7"><i class="fas fa-chevron-down fa-2x"></i></a>
</div>
</section>
<section>
<div class="answer-container" id="sc7">
<p data-aos="faded-left">Thus a wavefunction can only be normalized if the wavefunction is <span class="yellow">single-valued</span>, <span class="yellow"> square-integrable</span>, and <span class="yellow"> continuous</span>.</p>
<p data-aos="faded-left">In example, the integral ∫ 1 Ψ(x) | ²dx = B can be calculated. </p>
</div>
</section>
<section>
<div class="end-banner">
<h3>Chemistry 373</h3>
<i class="fas fa-flask fa-4x"></i>
</div>
</section>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://unpkg.com/aos@next/dist/aos.js"></script>
<script src="app.js"></script>
<script>
AOS.init({
offset: 150,
duration: 1000});
</script>
</body>
</html>
注意：我已经编辑了您的style.css。您需要执行以下操作：background-image: url("../images/img1.jpg");
不知道为什么这对您不起作用-当我下载GitHub解决方案并修改您的style.css时，它立即起作用了！
我建议您做什么：
.banner-container:before {
content: "";
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100vh;
background-image: url("../images/img1.jpg");
background-position: center;
background-size: cover;
background-repeat: no-repeat;
z-index: -1;
}