HTML+CSS 实现通用的企业官网页面（记得收藏）

<header>
        <div class="container">
            <nav>
                <ul>
                    <li><a href="#home">首页</a></li>
                    <li>
                        <a href="#about">关于</a>
                        <ul>
                            <li><a href="#team">我们的团队</a></li>
                            <li><a href="#history">我们的历史</a></li>
                            <li><a href="#values">我们的价值观</a></li>
                        </ul>
                    </li>
                    <li>
                        <a href="#services">服务</a>
                        <ul>
                            <li><a href="#web-development">网站开发</a></li>
                            <li><a href="#app-development">应用开发</a></li>
                            <li><a href="#marketing">数字营销</a></li>
                        </ul>
                    </li>
                    <li><a href="#contact">联系我们</a></li>
                </ul>
            </nav>
        </div>
    </header>
    <section class="hero" id="home">
        <div class="container">
            <h1>欢迎来到我们的网站</h1>
            <p>这里是一个简洁现代的网页设计示例，我们致力于提供卓越的用户体验。</p>
        </div>
    </section>
    <main class="content container">
        <div class="card" id="about">
            <img src="about-image.jpg" alt="关于我们">
            <h2>关于我们</h2>
            <p>我们是一家专注于提供高质量服务的公司，拥有超过十年的行业经验，致力于帮助客户实现业务增长。</p>
            <a href="#">了解更多</a>
        </div>
        <div class="card" id="services">
            <img src="services-image.jpg" alt="我们的服务">
            <h2>我们的服务</h2>
            <p>我们提供包括网站开发、移动应用开发、数字营销等在内的多种创新解决方案，以满足您的业务需求。</p>
            <a href="#">服务详情</a>
        </div>
        <div class="card" id="contact">
            <img src="contact-image.jpg" alt="联系我们">
            <h2>联系我们</h2>
            <p>如果您有任何问题或合作意向，请通过以下方式与我们取得联系。</p>
            <a href="#">联系方式</a>
        </div>
    </main>
    <footer>
        <div class="container">
            <p>&copy; 2024 现代网站设计。保留所有权利。</p>
        </div>
    </footer>

<style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            color: #333;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: #f4f4f4;
            padding: 1rem 0;
            position: relative;
        }
        nav ul {
            list-style: none;
            display: flex;
            justify-content: space-between;
        }
        nav ul li {
            position: relative;
        }
        nav ul li a {
            text-decoration: none;
            color: #333;
            font-weight: bold;
            padding: 10px 15px;
            display: block;
            transition: color 0.3s ease-in-out, transform 0.3s ease-in-out;
        }
        nav ul li a:hover {
            color: #007bff;
            transform: scale(1.1);
        }
        nav ul li ul {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #f4f4f4;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            animation: fadeIn 0.3s ease-out;
        }
        nav ul li ul li {
            width: 150px;
        }
        nav ul li ul li a {
            padding: 10px;
            transition: background-color 0.3s ease-in-out;
        }
        nav ul li ul li a:hover {
            background-color: #007bff;
            color: #fff;
        }
        nav ul li:hover ul {
            display: block;
        }
        .hero {
            background-color: #e9e9e9;
            text-align: center;
            padding: 4rem 0;
            animation: fadeIn 2s ease-out;
        }
        .hero h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            animation: slideInFromLeft 1s ease-out;
        }
        .hero p {
            animation: slideInFromRight 1.5s ease-out;
        }
        .content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            padding: 2rem 0;
        }
        .card {
            flex-basis: calc(33.333% - 20px);
            background-color: #fff;
            border: 1px solid #ddd;
            border-radius: 5px;
            padding: 1rem;
            margin-bottom: 2rem;
            animation: fadeInUp 1s ease-out;
            animation-fill-mode: backwards;
            animation-delay: 0.5s;
            transition: transform 0.3s ease-in-out;
        }
        .card:hover {
            transform: translateY(-10px);
        }
        .card img {
            max-width: 100%;
            height: auto;
            margin-bottom: 1rem;
        }
        .card h2 {
            margin-bottom: 0.5rem;
        }
        .card a {
            display: inline-block;
            margin-top: 1rem;
            padding: 0.5rem 1rem;
            background-color: #333;
            color: #fff;
            text-decoration: none;
            border-radius: 5px;
            transition: background-color 0.3s ease-in-out;
        }
        .card a:hover {
            background-color: #007bff;
        }
        footer {
            background-color: #333;
            color: #fff;
            text-align: center;
            padding: 1rem 0;
            transition: background-color 0.3s ease-in-out;
        }
        footer:hover {
            background-color: #007bff;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }
        @keyframes slideInFromLeft {
            from {
                opacity: 0;
                transform: translateX(-50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }
        @keyframes slideInFromRight {
            from {
                opacity: 0;
                transform: translateX(50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }
        @media (max-width: 768px) {
            nav ul {
                flex-direction: column;
            }
            .card {
                flex-basis: 100%;
                animation: none;
            }
        }
    </style>