/* ====== album.css ====== */

/* 全屏轮播图 */
.hero-slider {
    position: relative;
    height: 100vh;
    overflow: hidden;
    background: #000;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: zoomIn 10s ease-in-out infinite;
}

@keyframes zoomIn {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.slide-info {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: #fff;
    padding: 1.5rem 2.5rem;
    animation: slideUp 1s ease-out;
    /* 透明关键 */
    background: transparent;
    backdrop-filter: none;
    border-radius: 0;
}

/* 文字阴影保证可读性 */
.slide-info h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.slide-info p {
    font-size: 1.1rem;
    opacity: 0.9;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
}

@keyframes slideUp {
    from {
        transform: translateX(-50%) translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

/* 轮播按钮 */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 50%;
    backdrop-filter: blur(10px);
}

.slider-btn:hover {
    background: rgba(126, 91, 239, 0.6);
    transform: translateY(-50%) scale(1.1);
}

.slider-btn.prev { left: 2rem; }
.slider-btn.next { right: 2rem; }

/* 小圆点指示器 */
.slider-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 30%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    width: 30px;
    border-radius: 6px;
    background: var(--primary-purple);
}

/* 相册主页面 */
.album-main {
    padding: 6rem 5%;
    background: linear-gradient(135deg, rgba(249, 245, 255, 0.9), #ffffff);
}

/* 筛选器 */
.filter-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.8rem 1.8rem;
    border: 2px solid var(--primary-purple);
    background: transparent;
    color: var(--primary-purple);
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-purple);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(126, 91, 239, 0.3);
}

/* 图片网格 */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.4s ease;
    box-shadow: 0 8px 32px rgba(126, 91, 239, 0.15);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.gallery-item:nth-child(3n+1) { animation-delay: 0.1s; }
.gallery-item:nth-child(3n+2) { animation-delay: 0.2s; }
.gallery-item:nth-child(3n+3) { animation-delay: 0.3s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(126, 91, 239, 0.9), rgba(157, 78, 221, 0.9));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
    color: white;
    text-align: center;
    padding: 2rem;
}

.gallery-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(126, 91, 239, 0.3);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.gallery-overlay p {
    font-size: 1rem;
    opacity: 0.9;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1200px;
    margin: 5% auto;
    text-align: center;
}

.modal-content img {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 10px;
    animation: zoomInModal 0.5s ease;
}

@keyframes zoomInModal {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-caption {
    margin-top: 2rem;
    color: white;
}

.modal-caption h4 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.modal-caption p {
    font-size: 1.1rem;
    opacity: 0.8;
}

.modal-close {
    position: absolute;
    top: -50px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--primary-purple);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1.5rem;
    }
    
    .filter-container {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .slide-info {
        bottom: 60px;
        padding: 1rem 1.5rem;
    }
    
    .slide-info h3 {
        font-size: 1.4rem;
    }
    
    .slide-info p {
        font-size: 0.9rem;
    }
}

/* ===== 标题与图片入场动画 ===== */
.section-title,
.gallery-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .6s ease, transform .6s ease;
}
.section-title.show,
.gallery-item.show {
    opacity: 1;
    transform: translateY(0);
}