下拉菜单有效，但仅当我将鼠标悬停而不单击时

Question

我的菜单起作用，但仅当我将鼠标悬停而不单击时才起作用。它不会显示在移动设备上，而只会显示为服务，而不能单击。

这是代码。

我认为我缺少使下拉框可点击的功能。

/*--------------------------------------------------------------
# General
--------------------------------------------------------------*/

body {
  background: #fff4e9;
  color: #444;
  font-family: "Open Sans", sans-serif;
}

a {
  color: #993300;
  transition: 0.5s;
}

a:hover,
a:active,
a:focus {
  color: #993300;
  outline: none;
  text-decoration: none;
}

p {
  padding: 0;
  margin: 0 0 30px 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Montserrat", sans-serif;
  font-weight: 400;
  margin: 0 0 20px 0;
  padding: 0;
}


/* Back to top button */

.back-to-top {
  position: fixed;
  display: none;
  background: #993300;
  color: #fff;
  padding: 6px 12px 9px 12px;
  font-size: 16px;
  border-radius: 2px;
  right: 15px;
  bottom: 15px;
  transition: background 0.5s;
}

.back-to-top:focus {
  background: #993300;
  color: #fff;
  outline: none;
}

.back-to-top:hover {
  background: #993300;
  color: #fff;
}


/*--------------------------------------------------------------
# Top Bar
--------------------------------------------------------------*/

#topbar {
  background: #fff4e9;
  padding: 10px 0;
  border-bottom: 1px solid #eee;
  font-size: 14px;
}

#topbar .contact-info a {
  line-height: 1;
  color: #555;
}

#topbar .contact-info a:hover {
  color: #993300;
}

#topbar .contact-info i {
  color: #993300;
  padding: 4px;
}

#topbar .contact-info .fa-phone {
  padding-left: 20px;
  margin-left: 20px;
  border-left: 1px solid #e9e9e9;
}

#topbar .social-links a {
  color: #555;
  padding: 4px 12px;
  display: inline-block;
  line-height: 1px;
  border-left: 1px solid #e9e9e9;
}

#topbar .social-links a:hover {
  color: #993300;
}

#topbar .social-links a:first-child {
  border-left: 0;
}


/*--------------------------------------------------------------
# Header
--------------------------------------------------------------*/

#header {
  padding: 20px 0;
  height: 84px;
  transition: all 0.5s;
  z-index: 997;
  background: #fff4e9;
  box-shadow: 0px 6px 9px 0px rgba(0, 0, 0, 0.06);
}

#header #logo h1 {
  font-size: 42px;
  margin: 0;
  padding: 0;
  line-height: 1;
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
}

#header #logo h1 a {
  color: #993300;
  line-height: 1;
  display: inline-block;
}

#header #logo h1 a span {
  color: #993300;
}

#header #logo img {
  padding: 0;
  margin: 0;
}


/*--------------------------------------------------------------
# Intro Section
--------------------------------------------------------------*/

#intro {
  width: 100%;
  height: 60vh;
  position: relative;
  background: url("../img/intro-carousel/1.jpg") no-repeat;
  background-size: cover;
}

#intro .intro-content {
  position: absolute;
  bottom: 0;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  text-align: center;
}

#intro .intro-content h2 {
  color: #993300;
  margin-bottom: 30px;
  font-size: 64px;
  font-weight: 700;
}

#intro .intro-content h2 span {
  color: #993300;
  text-decoration: underline;
}

#intro .intro-content .btn-get-started,
#intro .intro-content .btn-projects {
  font-family: "Raleway", sans-serif;
  font-size: 15px;
  font-weight: bold;
  letter-spacing: 1px;
  display: inline-block;
  padding: 10px 32px;
  border-radius: 2px;
  transition: 0.5s;
  margin: 10px;
  color: #fff;
}

#intro .intro-content .btn-get-started {
  background: #993300;
  border: 2px solid #993300;
}

#intro .intro-content .btn-get-started:hover {
  background: none;
  color: #993300;
}

#intro .intro-content .btn-projects {
  background: #993300;
  border: 2px solid #993300;
}

#intro .intro-content .btn-projects:hover {
  background: none;
  color: #993300;
}

#intro #intro-carousel {
  z-index: 8;
}

#intro #intro-carousel::before {
  content: '';
  background-color: );
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  z-index: 7;
}

#intro #intro-carousel .item {
  width: 100%;
  height: 60vh;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition-property: opacity;
}


/*--------------------------------------------------------------
# Navigation Menu
--------------------------------------------------------------*/


/* Nav Menu Essentials */

.nav-menu,
.nav-menu * {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-menu>li>.dropdown-menu {
  background-color: #fff4e9;
}

.nav-menu>li>.dropdown-item {
  background-color: #fff4e9;
}

.dropdown-menu>li>a:hover {
  background-color: #fff4e9;
  background-image: none;
}

.nav-menu ul {
  position: absolute;
  display: none;
  top: 100%;
  left: 0;
  z-index: 99;
}

.nav-menu li {
  position: relative;
  white-space: nowrap;
}

.nav-menu>li {
  float: left;
}

.nav-menu li:hover>ul,
.nav-menu li.sfHover>ul {
  display: block;
}

.nav-menu ul ul {
  top: 0;
  left: 100%;
}

.nav-menu ul li {
  min-width: 180px;
}


/* Nav Menu Arrows */

.sf-arrows .sf-with-ul {
  padding-right: 22px;
}

.sf-arrows .sf-with-ul:after {
  content: "\f107";
  position: absolute;
  right: 8px;
  font-family: FontAwesome;
  font-style: normal;
  font-weight: normal;
}

.sf-arrows ul .sf-with-ul:after {
  content: "\f105";
}


/* Nav Meu Container */

#nav-menu-container {
  float: right;
  margin: 0;
}


/* Nav Meu Styling */

.nav-menu a {
  padding: 10px 8px;
  text-decoration: none;
  display: inline-block;
  color: #555;
  font-family: "Raleway", sans-serif;
  font-weight: 700;
  font-size: 14px;
  outline: none;
}

.nav-menu li:hover>a,
.nav-menu .menu-active>a {
  color: #993300;
}

.nav-menu>li {
  margin-left: 10px;
}

.nav-menu ul {
  margin: 4px 0 0 0;
  padding: 10px;
  box-shadow: 0px 0px 30px rgba(127, 137, 161, 0.25);
  background: #fff;
}

.nav-menu ul li {
  transition: 0.3s;
}

.nav-menu ul li a {
  padding: 10px;
  color: #333;
  transition: 0.3s;
  display: block;
  font-size: 13px;
  text-transform: none;
}

.nav-menu ul li:hover>a {
  color: #993300;
}

.nav-menu ul ul {
  margin: 0;
}


/* Mobile Nav Toggle */

#mobile-nav-toggle {
  position: fixed;
  right: 0;
  top: 0;
  z-index: 999;
  margin: 20px 20px 0 0;
  border: 0;
  background: none;
  font-size: 24px;
  display: none;
  transition: all 0.4s;
  outline: none;
  cursor: pointer;
}

#mobile-nav-toggle i {
  color: #555;
}


/* Mobile Nav Styling */

#mobile-nav {
  position: fixed;
  top: 0;
  padding-top: 18px;
  bottom: 0;
  z-index: 998;
  background: rgba(52, 59, 64, 0.9);
  left: -260px;
  width: 260px;
  overflow-y: auto;
  transition: 0.4s;
}

#mobile-nav ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

#mobile-nav ul li {
  position: relative;
}

#mobile-nav ul li a {
  color: #fff;
  font-size: 16px;
  overflow: hidden;
  padding: 10px 22px 10px 15px;
  position: relative;
  text-decoration: none;
  width: 100%;
  display: block;
  outline: none;
}

#mobile-nav ul li a:hover {
  color: #fff;
}

#mobile-nav ul li li {
  padding-left: 30px;
}

#mobile-nav ul .menu-has-children i {
  position: absolute;
  right: 0;
  z-index: 99;
  padding: 15px;
  cursor: pointer;
  color: #fff;
}

#mobile-nav ul .menu-has-children i.fa-chevron-up {
  color: #993300;
}

#mobile-nav ul .menu-item-active {
  color: #993300;
}

#mobile-body-overly {
  width: 100%;
  height: 100%;
  z-index: 997;
  top: 0;
  left: 0;
  position: fixed;
  background: rgba(52, 59, 64, 0.9);
  display: none;
}


/* Mobile Nav body classes */

body.mobile-nav-active {
  overflow: hidden;
}

body.mobile-nav-active #mobile-nav {
  left: 0;
}

body.mobile-nav-active #mobile-nav-toggle {
  color: #fff;
}


/*--------------------------------------------------------------
# Sections
--------------------------------------------------------------*/


/* Sections Header
--------------------------------*/

.section-header {
  margin-bottom: 30px;
}

.section-header h2 {
  font-size: 32px;
  color: #993300;
  text-transform: uppercase;
  font-weight: 700;
  position: relative;
  padding-bottom: 20px;
}

.section-header h3 {
  font-size: 26px;
  color: #993300;
  text-transform: uppercase;
  font-weight: 700;
  position: relative;
  padding-bottom: 20px;
}

.section-header h2::before {
  content: '';
  position: absolute;
  display: block;
  width: 50px;
  height: 3px;
  background: #993300;
  bottom: 0;
  left: 0;
}

.section-header h3::before {
  content: '';
  position: absolute;
  display: block;
  width: 50px;
  height: 3px;
  background: #993300;
  bottom: 0;
  left: 0;
}

.section-header p {
  padding: 0;
  margin: 0;
}


/* About Section
--------------------------------*/

#about {
  padding: 60px 0 30px 0;
}

#about .about-img {
  overflow: hidden;
}

#about .about-img img {
  margin-left: -15px;
  max-width: 100%;
}

#about .content h2 {
  color: #993300;
  font-weight: 700;
  font-size: 36px;
  font-family: "Raleway", sans-serif;
}

#about .content h3 {
  color: #555;
  font-weight: 300;
  font-size: 18px;
  line-height: 26px;
  font-style: italic;
}

#about .content p {
  line-height: 26px;
}

#about .content p:last-child {
  margin-bottom: 0;
}

#about .content i {
  font-size: 20px;
  padding-right: 4px;
  color: #993300;
}

#about .content ul {
  list-style: none;
  padding: 0;
}

#about .content ul li {
  padding-bottom: 10px;
}


/* Services Section
--------------------------------*/

#services {
  padding: 30px 0 0 0;
}

#services .box {
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: 10px 10px 15px rgba(73, 78, 92, 0.1);
  background: #fff4e9;
  transition: 0.4s;
}

#services .box:hover {
  box-shadow: 0px 0px 30px rgba(73, 78, 92, 0.15);
  transform: translateY(-10px);
  -webkit-transform: translateY(-10px);
  -moz-transform: translateY(-10px);
}

#services .box .icon {
  float: left;
}

#services .box .icon i {
  color: #444;
  font-size: 64px;
  transition: 0.5s;
  line-height: 0;
  margin-top: 34px;
}

#services .box .icon i:before {
  background: #993300;
  background: linear-gradient(45deg, #993300 0%, #993300 100%);
  background-clip: border-box;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

#services .box h4 {
  margin-left: 100px;
  font-weight: 700;
  margin-bottom: 15px;
  font-size: 22px;
}

#services .box h4 a {
  color: #444;
}

#services .box p {
  font-size: 14px;
  margin-left: 100px;
  margin-bottom: 0;
  line-height: 24px;
}


/* Clients Section
--------------------------------*/

#clients {
  padding: 30px 0;
}

#clients img {
  max-width: 100%;
  opacity: 0.5;
  transition: 0.3s;
  padding: 15px 0;
}

#clients img:hover {
  opacity: 1;
}

#clients .owl-nav,
#clients .owl-dots {
  margin-top: 5px;
  text-align: center;
}

#clients .owl-dot {
  display: inline-block;
  margin: 0 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #ddd;
}

#clients .owl-dot.active {
  background-color: #993300;
}


/* Our Portfolio Section
--------------------------------*/

#portfolio {
  background: #fff4e9;
  padding: 30px 0;
}

#portfolio .portfolio-overlay {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
  transition: all ease-in-out 0.4s;
}

#portfolio .portfolio-item {
  overflow: hidden;
  position: relative;
  padding: 0;
  vertical-align: middle;
  text-align: center;
}

#portfolio .portfolio-item h2 {
  color: #ffffff;
  font-size: 24px;
  margin: 0;
  text-transform: capitalize;
  font-weight: 700;
}

#portfolio .portfolio-item img {
  transition: all ease-in-out 0.4s;
  width: 100%;
}

#portfolio .portfolio-item:hover img {
  -webkit-transform: scale(1.1);
  transform: scale(1.1);
}

#portfolio .portfolio-item:hover .portfolio-overlay {
  opacity: 1;
  background: rgba(0, 0, 0, 0.7);
}

#portfolio .portfolio-info {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}


/* Testimonials Section
--------------------------------*/

#testimonials {
  padding: 30px 0;
}

#testimonials .testimonial-item {
  box-sizing: content-box;
  padding: 30px 30px 0 30px;
  margin: 30px 15px;
  text-align: center;
  min-height: 350px;
  box-shadow: 0px 2px 12px rgba(0, 0, 0, 0.08);
}

#testimonials .testimonial-item .testimonial-img {
  width: 90px;
  border-radius: 50%;
  border: 4px solid #fff;
  margin: 0 auto;
}

#testimonials .testimonial-item h3 {
  font-size: 18px;
  font-weight: bold;
  margin: 10px 0 5px 0;
  color: #111;
}

#testimonials .testimonial-item h4 {
  font-size: 14px;
  color: #999;
  margin: 0;
}

#testimonials .testimonial-item .quote-sign-left {
  margin-top: -15px;
  padding-right: 10px;
  display: inline-block;
  width: 37px;
}

#testimonials .testimonial-item .quote-sign-right {
  margin-bottom: -15px;
  padding-left: 10px;
  display: inline-block;
  max-width: 100%;
  width: 37px;
}

#testimonials .testimonial-item p {
  font-style: italic;
  margin: 0 auto 15px auto;
}

#testimonials .owl-nav,
#testimonials .owl-dots {
  margin-top: 5px;
  text-align: center;
}

#testimonials .owl-dot {
  display: inline-block;
  margin: 0 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #ddd;
}

#testimonials .owl-dot.active {
  background-color: #993300;
}


/* Call To Action Section
--------------------------------*/

#call-to-action {
  background: #081e5b;
  background-size: cover;
  padding: 40px 0;
}

#call-to-action .cta-title {
  color: #fff;
  font-size: 28px;
  font-weight: 700;
}

#call-to-action .cta-text {
  color: #fff;
}

#call-to-action .cta-btn {
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 1px;
  display: inline-block;
  padding: 8px 26px;
  border-radius: 3px;
  transition: 0.5s;
  margin: 10px;
  border: 3px solid #fff;
  color: #fff;
}

#call-to-action .cta-btn:hover {
  background: #993300;
  border: 3px solid #993300;
}


/* Our Team Section
--------------------------------*/

#team {
  background: #fff;
  padding: 30px 0 0 0;
}

#team .member {
  text-align: center;
  margin-bottom: 20px;
}

#team .member .pic {
  overflow: hidden;
  text-align: center;
}

#team .member .pic img {
  max-width: 100%;
}

#team .member .details {
  background: #993300;
  color: #fff;
  padding: 15px;
  border-radius: 0 0 3px 3px;
}

#team .member h4 {
  font-weight: 700;
  margin-bottom: 2px;
  font-size: 18px;
}

#team .member span {
  font-style: italic;
  display: block;
  font-size: 13px;
}

#team .member .social {
  margin-top: 5px;
}

#team .member .social a {
  color: #fff;
}

#team .member .social i {
  font-size: 16px;
  margin: 0 2px;
}


/* Contact Section
--------------------------------*/

#contact {
  padding: 30px 0;
}

#contact .contact-info {
  margin-bottom: 20px;
  text-align: center;
}

#contact .contact-info i {
  font-size: 48px;
  display: inline-block;
  margin-bottom: 10px;
  color: #993300;
}

#contact .contact-info address,
#contact .contact-info p {
  margin-bottom: 0;
  color: #000;
}

#contact .contact-info h3 {
  font-size: 18px;
  margin-bottom: 15px;
  font-weight: bold;
  text-transform: uppercase;
  color: #999;
}

#contact .contact-info a {
  color: #000;
}

#contact .contact-info a:hover {
  color: #993300;
}

#contact .contact-address,
#contact .contact-phone,
#contact .contact-email {
  margin-bottom: 20px;
}

#contact #google-map {
  height: 290px;
  margin-bottom: 20px;
}

#contact .form #sendmessage {
  color: #993300;
  border: 1px solid #993300;
  display: none;
  text-align: center;
  padding: 15px;
  font-weight: 600;
  margin-bottom: 15px;
}

#contact .form #errormessage {
  color: red;
  display: none;
  border: 1px solid red;
  text-align: center;
  padding: 15px;
  font-weight: 600;
  margin-bottom: 15px;
}

#contact .form #sendmessage.show,
#contact .form #errormessage.show,
#contact .form .show {
  display: block;
}

#contact .form .validation {
  color: red;
  display: none;
  margin: 0 0 20px;
  font-weight: 400;
  font-size: 13px;
}

#contact .form input,
#contact .form textarea {
  padding: 10px 14px;
  border-radius: 0;
  box-shadow: none;
  font-size: 15px;
}

#contact .form button[type="submit"] {
  background: #993300;
  border: 0;
  border-radius: 3px;
  padding: 10px 30px;
  color: #fff;
  transition: 0.4s;
  cursor: pointer;
}

#contact .form button[type="submit"]:hover {
  background: #2dc899;
}


/*--------------------------------------------------------------
# Footer
--------------------------------------------------------------*/

#footer {
  background: #fff4e9;
  padding: 0 0 30px 0;
  font-size: 14px;
}

#footer .copyright {
  text-align: center;
  padding-top: 30px;
}

#footer .credits {
  text-align: center;
  font-size: 13px;
  color: #555;
}

#footer .credits a {
  color: #993300;
}

@media (min-width: 768px) {
  #contact .contact-address,
  #contact .contact-phone,
  #contact .contact-email {
    padding: 20px 0;
  }
  #contact .contact-phone {
    border-left: 1px solid #ddd;
    border-right: 1px solid #ddd;
  }
}

@media (min-width: 769px) {
  #call-to-action .cta-btn-container {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: end;
    -webkit-justify-content: flex-end;
    -ms-flex-pack: end;
    justify-content: flex-end;
  }
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 15px;
  }
  #header {
    padding: 20px 0;
    height: 74px;
  }
  #header #logo h1 {
    font-size: 34px;
  }
  #header #logo img {
    max-height: 40px;
  }
  #nav-menu-container {
    display: none;
  }
  #mobile-nav-toggle {
    display: inline;
  }
  #about .about-img {
    height: auto;
  }
  #about .about-img img {
    margin-left: 0;
    padding-bottom: 30px;
  }
}

@media (max-width: 767px) {
  #intro .intro-content h2 {
    font-size: 34px;
  }
  #services .box .box {
    margin-bottom: 20px;
  }
  #services .box .icon {
    float: none;
    text-align: center;
    padding-bottom: 15px;
  }
  #services .box h4,
  #services .box p {
    margin-left: 0;
    text-align: center;
  }
  #testimonials .testimonial-item {
    margin: 30px 10px;
  }
}

@media (max-width: 576px) {
  #contact #google-map {
    margin-top: 20px;
  }
}

#thumbnails {
  display: block;
  margin-bottom: 10px;
}

#thumbnails ul li {
  float: left;
  margin-right: 12px;
  margin-left: 12px;
  margin-bottom: 12px;
}

<nav id="nav-menu-container">
  <ul class="nav-menu">
    <li class="menu-active"><a href="index.html">Home</a></li>
    <li><a href="about.html">About us</a></li>

    <li class="dropdown">
      <a class="dropdown-item">Services</a>
      <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="page1.html">page1</a></li>
        <li><a class="dropdown-item" href="page2.html">page2</a></li>
      </ul>
      
         <li><a href="page3.html">page3</a></li>
        <li><a href="page4.html">page4</a></li>
         </ul>
</nav>

Answer 1

答案就在您眼前！ @MattOpen向您发送了Bootstrap导航组件。 正如您所说的那样，我不会为您做这项工作，因此最好的学习方法就是坚持使用！进行复制，以便您始终可以还原和测试。

请看下面的这段代码，然后与您一起玩CSS：）`

<div class="collapse navbar-collapse" id="navbarNavDropdown">
    <ul class="navbar-nav">
        <li class="nav-item active">
            <a class="nav-link" href="index.html">Home<span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
      Services
    </a>
            <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                <a class="dropdown-item" href="page1.html">Dropdown Page 1</a>
                <a class="dropdown-item" href="page2.html">Dropdwon Page 2</a>
            </div>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="page3.html">page 3</a>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="page4.html">page 4</a>
        </li>

    </ul>
</div>

`