<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Modern Dynamic Page</title>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap" rel="stylesheet">
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', sans-serif;
        }

        :root {
            --primary: #4361ee;
            --secondary: #3f37c9;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
        }

        body {
            line-height: 1.6;
            color: var(--dark);
            background-color: var(--light);
        }

        /* Header & Navigation */
        header {
            position: fixed;
            width: 100%;
            background: transparent;
            padding: 1.5rem 0;
            transition: all 0.3s ease;
            z-index: 1000;
        }

        header.scrolled {
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 1rem 0;
        }

        nav {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2rem;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            gap: 2rem;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 0 2rem;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .hero-content h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 1s ease forwards 0.2s;
        }

        .hero-content p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 1s ease forwards 0.4s;
        }

        .btn {
            display: inline-block;
            padding: 0.8rem 2rem;
            background: white;
            color: var(--primary);
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 1s ease forwards 0.6s;
        }

        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }

        /* Features Section */
        .features {
            padding: 6rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 4rem;
            color: var(--dark);
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .section-title.show {
            opacity: 1;
            transform: translateY(0);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .feature-card.show {
            opacity: 1;
            transform: translateY(0);
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }

        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--primary);
        }

        /* Counter Section */
        .counter-section {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            padding: 6rem 2rem;
            text-align: center;
            color: white;
        }

        .counter-container {
            max-width: 600px;
            margin: 0 auto;
        }

        .counter-value {
            font-size: 4rem;
            font-weight: 700;
            margin: 2rem 0;
            opacity: 0;
            transform: scale(0.8);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .counter-value.show {
            opacity: 1;
            transform: scale(1);
        }

        .counter-btn {
            background: white;
            color: #f5576c;
            font-size: 1.2rem;
        }

        /* Footer */
        footer {
            background: var(--dark);
            color: white;
            text-align: center;
            padding: 2rem;
        }

        /* Animations */
        @keyframes fadeUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.5rem;
            }

            .nav-links {
                display: none;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
        }
    </style>
</head>
<body>
    <!-- Header -->
    <header id="header">
        <nav>
            <div class="logo">DynamicPage</div>
            <div class="nav-links">
                <a href="#home">Home</a>
                <a href="#features">Features</a>
                <a href="#counter">Counter</a>
            </div>
        </nav>
    </header>

    <!-- Hero Section -->
    <section class="hero" id="home">
        <div class="hero-content">
            <h1>Modern Dynamic Web Experience</h1>
            <p>Beautiful, responsive, and interactive page with smooth animations and clean design</p>
            <a href="#features" class="btn">Explore Features</a>
        </div>
    </section>

    <!-- Features Section -->
    <section class="features" id="features">
        <h2 class="section-title">Our Features</h2>
        <div class="features-grid">
            <div class="feature-card">
                <h3>Smooth Animations</h3>
                <p>Enjoy fluid transitions and fade-in effects as you scroll through the page, creating an engaging user experience.</p>
            </div>
            <div class="feature-card">
                <h3>Responsive Design</h3>
                <p>Fully adaptive to all devices - from desktop to mobile, ensuring perfect viewing everywhere.</p>
            </div>
            <div class="feature-card">
                <h3>Interactive Elements</h3>
                <p>Clickable buttons, animated cards, and dynamic counter to make your browsing experience interactive.</p>
            </div>
        </div>
    </section>

    <!-- Counter Section -->
    <section class="counter-section" id="counter">
        <div class="counter-container">
            <h2>Interactive Counter</h2>
            <div class="counter-value" id="counterValue">0</div>
            <button class="btn counter-btn" id="counterBtn">Click Me!</button>
        </div>
    </section>

    <!-- Footer -->
    <footer>
        <p>&copy; 2024 DynamicPage. All rights reserved.</p>
    </footer>

    <script>
        // Header scroll effect
        window.addEventListener('scroll', function() {
            const header = document.getElementById('header');
            header.classList.toggle('scrolled', window.scrollY > 50);
        });

        // Scroll reveal animation
        const observerOptions = {
            threshold: 0.1,
            rootMargin: '0px 0px -50px 0px'
        };

        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    entry.target.classList.add('show');
                }
            });
        }, observerOptions);

        // Observe elements
        document.querySelectorAll('.section-title, .feature-card, .counter-value').forEach(el => {
            observer.observe(el);
        });

        // Smooth scrolling for nav links
        document.querySelectorAll('a[href^="#"]').forEach(anchor => {
            anchor.addEventListener('click', function(e) {
                e.preventDefault();
                const target = document.querySelector(this.getAttribute('href'));
                if (target) {
                    target.scrollIntoView({
                        behavior: 'smooth',
                        block: 'start'
                    });
                }
            });
        });

        // Counter functionality
        let counter = 0;
        const counterValue = document.getElementById('counterValue');
        const counterBtn = document.getElementById('counterBtn');

        counterBtn.addEventListener('click', () => {
            counter++;
            counterValue.textContent = counter;
            // Add pulse animation
            counterValue.style.transform = 'scale(1.2)';
            setTimeout(() => {
                counterValue.style.transform = 'scale(1)';
            }, 200);
        });
    </script>
</body>
</html>

作者声明:本文包含人工智能生成内容。