アコーディオン:グラデーション|Accordion: Gradient
- Beautiful gradient background
- Colorful and attractive
- Button with icon
- Smooth animation
- Visually impactful design
HTML
<div class="container">
<div class="btn-box">
<button data-default-text="Gradient Accordion" data-open-text="Close">Gradient Accordion</button>
</div>
<div class="more">
<ul>
<li>Beautiful gradient background</li>
<li>Colorful and attractive</li>
<li>Button with icon</li>
<li>Smooth animation</li>
<li>Visually impactful design</li>
</ul>
</div>
</div>
CSS
@keyframes fadeIn {
0% {
opacity: 0;
transform: translateY(-10px);
}
100% {
opacity: 1;
transform: none;
}
}
.container {
margin-bottom: 30px;
max-width: 600px;
margin-left: auto;
margin-right: auto;
}
.container .btn-box button {
width: 100%;
padding: 18px 25px;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
border: none;
border-radius: 10px;
font-size: 16px;
font-weight: 600;
color: #fff;
cursor: pointer;
transition: all 0.3s ease;
text-align: left;
position: relative;
overflow: hidden;
}
.container .btn-box button::before {
content: '▼';
position: absolute;
right: 20px;
top: 50%;
transform: translateY(-50%);
transition: transform 0.3s ease;
}
.container .btn-box button:hover {
background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
transform: scale(1.02);
}
.container .more {
max-height: 0;
overflow: hidden;
transition: max-height 0.5s ease;
background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
border-radius: 0 0 10px 10px;
margin-top: -5px;
}
.container .more.appear {
max-height: 500px;
animation: fadeIn 0.3s ease;
}
.container .more.appear + .btn-box button::before {
transform: translateY(-50%) rotate(180deg);
}
.container .more ul {
list-style: none;
padding: 25px;
margin: 0;
}
.container .more li {
padding: 10px 0;
color: #fff;
font-weight: 500;
border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}
.container .more li:last-child {
border-bottom: none;
}
/* レスポンシブ対応 */
@media (max-width: 768px) {
.container .btn-box button {
font-size: 14px;
padding: 15px 20px;
}
.container .more ul {
padding: 15px;
}
}
JavaScript
document.addEventListener('DOMContentLoaded', function() {
const button = document.querySelector('.btn-box button');
const content = document.querySelector('.more');
button.addEventListener('click', function() {
content.classList.toggle('appear');
// ボタンテキストの切り替え
if (content.classList.contains('appear')) {
this.textContent = this.dataset.openText || '閉じる';
} else {
this.textContent = this.dataset.defaultText;
}
});
});