/* 頁面過渡效果 */

/* 淡入淡出效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
    
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 從左側滑入 */
.slide-in-left {
    opacity: 0;
    transform: translateX(-80px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 從右側滑入 */
.slide-in-right {
    opacity: 0;
    transform: translateX(80px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 縮放效果 */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* 卡片懸停效果 */
.advantage-card,
.expertise-card,
.vision-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.advantage-card:hover,
.expertise-card:hover,
.vision-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 按鈕過渡效果 */
.btn {
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

/* 頁面加載動畫 */
.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 延遲加載動畫 */
.delay-100 { transition-delay: 0.1s; }
.delay-200 { transition-delay: 0.2s; }
.delay-300 { transition-delay: 0.3s; }
.delay-400 { transition-delay: 0.4s; }
.delay-500 { transition-delay: 0.5s; }