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start.html
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<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>スプラッシュアニメーション</title>
<style>
body {
margin: 0;
overflow: hidden;
background-color: #3c3c6c;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
transition: opacity 1s;
}
.container {
position: absolute;
width: 100%;
height: 100%;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
}
.text, .logo {
color: white;
opacity: 0;
}
.logo {
width: 300px;
height: 300px;
transition: transform 0.1s, opacity 0.5s;
}
.text {
font-size: 3em;
margin-top: 20px;
white-space: nowrap;
overflow: hidden;
position: relative;
}
.text::before {
content: '';
position: absolute;
top: 0;
left: -100%;
width: 100%;
height: 100%;
background-color: #3c3c6c;
transition: left 1s;
}
.text.fade-in::before {
left: 100%;
transition: left 1s;
}
.text.fade-out::before {
left: 100%;
transition: left 1s;
}
.main-content {
display: none;
color: black;
text-align: center;
}
</style>
</head>
<body>
<div class="container">
<img src="assets/images/logo.svg" alt="Logo" class="logo" id="logo">
<div class="text" id="text">Kaisei Information Technologies</div>
</div>
<div class="main-content" id="main-content">
<h1>トップページ乗っかるとこでしょ？</h1>
<p>トップページ早く作ってー</p>
</div>
<script>
window.onload = () => {
setTimeout(() => {
document.getElementById('text').classList.add('fade-in');
document.getElementById('text').style.opacity = '1';
document.getElementById('logo').style.transform = 'translateY(0)';
document.getElementById('logo').style.opacity = '1';
}, 1000);
setTimeout(() => {
document.getElementById('text').classList.remove('fade-in');
document.getElementById('text').classList.add('fade-out');
document.getElementById('text').style.opacity = '0';
document.getElementById('logo').style.transform = 'translateY(-100%)';
document.getElementById('logo').style.opacity = '0';
}, 3500);
setTimeout(() => {
document.body.style.opacity = '0';
}, 4500);
setTimeout(() => {
document.querySelector('.container').style.display = 'none';
document.getElementById('main-content').style.display = 'block';
document.body.style.backgroundColor = 'white';
document.body.style.opacity = '1';
}, 5500);
};
</script>
</body>
</html>