/* 动画效果 */

/* 淡入效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 导航栏滚动效果 */
.header {
    transition: box-shadow 0.3s ease, height 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    height: 70px;
}

.header.scrolled .logo img {
    height: 40px;
}

/* 按钮悬停效果 */
.btn {
    position: relative;
    overflow: hidden;
}

.btn:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
}

.btn:hover:after {
    width: 300px;
    height: 300px;
}

/* 卡片悬停效果 */
.category-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.category-image {
    overflow: hidden;
}

.category-image img {
    transition: transform 0.5s ease;
}

.category-card:hover .category-image img {
    transform: scale(1.05);
}

/* 图标悬停效果 */
.case-icon i {
    transition: transform 0.3s ease, color 0.3s ease;
}

.case-item:hover .case-icon i {
    transform: scale(1.2);
    color: var(--accent-color);
}

/* 页脚链接悬停效果 */
.footer-column ul li a {
    position: relative;
    padding-left: 0;
    transition: padding-left 0.3s ease, color 0.3s ease;
}

.footer-column ul li a:before {
    content: '→';
    position: absolute;
    left: -20px;
    opacity: 0;
    transition: left 0.3s ease, opacity 0.3s ease;
}

.footer-column ul li a:hover {
    padding-left: 15px;
}

.footer-column ul li a:hover:before {
    left: 0;
    opacity: 1;
}

/* 社交媒体图标悬停效果 */
.social-links a i {
    transition: transform 0.3s ease;
}

.social-links a:hover i {
    transform: scale(1.2);
}