/* 全局动画变量 */
:root {
    --animation-timing: cubic-bezier(0.4, 0, 0.2, 1);
    --animation-duration: 0.6s;
}

/* 淡入上升动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 淡入缩放动画 */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 文字渐显动画 */
@keyframes textReveal {
    from {
        clip-path: inset(0 100% 0 0);
    }
    to {
        clip-path: inset(0 0 0 0);
    }
}

/* 应用动画的通用类 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--animation-duration) var(--animation-timing);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 服务卡片悬停效果 */
.service-item {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* 导航链接悬停效果 */
.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* 按钮悬停效果 */
.btn {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
    width: 300%;
    height: 300%;
}

/* 图片悬停效果 */
.img-hover {
    transition: transform 0.3s ease, filter 0.3s ease;
}

.img-hover:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* 加载动画 */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 页面切换过渡效果 */
.page-transition {
    animation: fadeInScale 0.6s var(--animation-timing);
}

/* 滚动进度条 */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary-color);
    z-index: 9999;
    transition: width 0.1s ease;
}