/* 全局样式 */
body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
}

/* 导航栏滚动效果 */
#navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding-top: 10px;
    padding-bottom: 10px;
}

/* 移动端菜单 */
#mobile-menu-button:focus + #mobile-menu {
    display: block;
}

/* 返回顶部按钮 */
#back-to-top.active {
    transform: scale(1);
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 图片悬停效果 */
.hover-scale {
    transition: transform 0.5s ease;
}

.hover-scale:hover {
    transform: scale(1.05);
}

/* 卡片悬停效果 */
.hover-card {
    transition: all 0.3s ease;
}

.hover-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 加载动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* 延迟动画 */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }