html小作品，HTML代码在线实时编辑、实时预览

            
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            <!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
    <style>
        :root {
            --title-size: 4em;
            --signature-size: 1.5em;
        }

        body {
            background: #ffe6f2;
            margin: 0;
            height: 100vh;
            overflow: hidden;
            touch-action: manipulation;
        }

        .container {
            position: relative;
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .title-box {
            position: relative;
            text-align: right;
            max-width: 90%;
        }

        .title {
            font-size: var(--title-size);
            color: #ff3366;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
            font-family: 'Arial', sans-serif;
            margin: 0;
            line-height: 1.2;
            word-break: keep-all;
        }

        .signature {
            font-size: var(--signature-size);
            color: #ff6699;
            font-style: italic;
            margin-top: 0.5em;
            position: relative;
            right: 0;
        }

        .heart {
            position: absolute;
            z-index: 1;
            animation: float 3s infinite;
            opacity: 0;
            pointer-events: none;
        }

        .heart::before,
        .heart::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 32px;
            background: #ff3366;
            border-radius: 20px 20px 0 0;
            transform: rotate(-45deg);
            transform-origin: 0 100%;
        }

        .heart::after {
            left: 20px;
            transform: rotate(45deg);
            transform-origin: 100% 100%;
        }

        @keyframes float {
            0% { transform: translateY(0); opacity: 0; }
            50% { opacity: 0.7; }
            100% { transform: translateY(-100vh); opacity: 0; }
        }

        @media (max-width: 768px) {
            :root {
                --title-size: 2.5em;
                --signature-size: 1.2em;
            }
            
            .title-box {
                margin-right: 10px;
            }
            
            .heart::before,
            .heart::after {
                width: 15px;
                height: 24px;
            }
        }

        @media (max-width: 480px) {
            :root {
                --title-size: 2em;
                --signature-size: 1em;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="title-box">
            <h1 class="title">情人节快乐</h1>
            <div class="signature">to SUN</div>
        </div>
    </div>

    <script>
        function createHeart() {
            const heart = document.createElement('div');
            heart.className = 'heart';
            
            // 响应式爱心大小
            const baseSize = window.innerWidth > 768 ? 30 : 20;
            const size = Math.random() * baseSize + (baseSize/2);
            heart.style.width = size + 'px';
            heart.style.height = size + 'px';
            
            // 控制生成区域（两侧各留15%空间）
            heart.style.left = 15 + Math.random() * 70 + '%';
            
            heart.style.animationDelay = Math.random() * 2 + 's';
            document.body.appendChild(heart);

            setTimeout(() => heart.remove(), 3000);
        }

        // 响应式生成频率
        function getInterval() {
            return window.innerWidth > 768 ? 300 : 500;
        }
        
        let heartInterval = setInterval(createHeart, getInterval());
        
        // 窗口大小变化时调整
        window.addEventListener('resize', () => {
            clearInterval(heartInterval);
            heartInterval = setInterval(createHeart, getInterval());
        });
    </script>
</body>
</html>
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