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html - CSS 选择器对 h1 标签不起作用

问题描述

我正在制作一个应该有一个大标题作为主要描述的网站。我已将描述嵌入<h1>标签中，并使用 CSS 使标签具有 Monsterrat 字体。但是无论我重新加载页面多少次，它都不会生效。

/******************** CLASS SELECTORS  ********************/
.phone {
    height: 500px;
    width: 550px;
    height: auto;
    margin-bottom: -120px;
}

/******************** ID SELECTORS  ********************/
#title {
    background-color: #2978b5;
}

/******************** TAG SELECTORS  ********************/
h1 {
    font-family: 'Montserrat-Black', sans-serif;
    font-size: 3rem;
    line-height: 1.5;
}
<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>Techno-Log</title>
    <link rel="stylesheet" href="styles.css">
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

</head>

<body>

  <section id="title">

    <!-- Nav Bar -->
    <nav class="navbar navbar-expand-lg navbar-dark">
        <a class="navbar-brand" href="">Techno-Log</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="navbar-nav ml-auto">
            <li class="nav-item">
                <a class="nav-link" href="">Download</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Features</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Reviews</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Brands</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Pricing</a>
            </li>
        </ul>
    </div>
    </nav>

    <!-- Title -->

    <div class="row">

        <div class="col-lg-6">
            <h1>Get the best technology updates and product news.</h1>
            <button type="button">Download</button>
            <button type="button">Download</button>
        </div>
        <div class="col-lg-6">
            <img class="phone" src="https://specials-images.forbesimg.com/imageserve/5f8ebc300be77fed7b88aaf4/960x0.jpg?fit=scale" alt="iphone-mockup">
        </div>

    </div>
  </section>
  
  </body>

标签： htmlcssbootstrap-4tags

解决方案

用不同的类覆盖默认的 Bootstrap 字体

@import url('https://fonts.googleapis.com/css?family=Montserrat');

/******************** CLASS SELECTORS  ********************/
.phone {
    height: 500px;
    width: 550px;
    height: auto;
    margin-bottom: -120px;
}

/******************** ID SELECTORS  ********************/
#title {
    background-color: #2978b5;
}

/******************** TAG SELECTORS  ********************/
h1 {
    font-size: 3rem;
    line-height: 1.5;
}

.montserrat{
  font-family: 'Montserrat-Black', sans-serif;
}
<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>Techno-Log</title>
    <link rel="stylesheet" href="styles.css">
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>

</head>

<body>

  <section id="title">

    <!-- Nav Bar -->
    <nav class="navbar navbar-expand-lg navbar-dark">
        <a class="navbar-brand" href="">Techno-Log</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <ul class="navbar-nav ml-auto">
            <li class="nav-item">
                <a class="nav-link" href="">Download</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Features</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Reviews</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Brands</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="">Pricing</a>
            </li>
        </ul>
    </div>
    </nav>

    <!-- Title -->

    <div class="row">

        <div class="col-lg-6">
            <h1 class="montserrat">Get the best technology updates and product news.</h1>
            <button type="button">Download</button>
            <button type="button">Download</button>
        </div>
        <div class="col-lg-6">
            <img class="phone" src="https://specials-images.forbesimg.com/imageserve/5f8ebc300be77fed7b88aaf4/960x0.jpg?fit=scale" alt="iphone-mockup">
        </div>

    </div>
  </section>
  
  </body>

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