/* 全局样式设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a2a6c, #b21f1f, #1a2a6c);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: #fff;
    min-height: 100vh;
    padding: 20px;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 头部样式 */
header {
    text-align: center;
    padding: 40px 0;
    margin-bottom: 30px;
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: 15px;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.7);
    background: linear-gradient(to right, #ff7e5f, #feb47b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: titleGlow 2s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    from { text-shadow: 0 0 10px rgba(255, 255, 255, 0.5); }
    to { text-shadow: 0 0 30px rgba(255, 255, 255, 0.9); }
}

header p {
    font-size: 1.2rem;
    opacity: 0.8;
}

/* 照片墙网格布局 */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px;
}

.photo-item {
    position: relative;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    height: 280px;
    background: #2c3e50;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
}

.photo-item:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    z-index: 10;
}

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

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

/* 悬停效果遮罩 */
.photo-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    padding: 20px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.photo-item:hover .photo-overlay {
    transform: translateY(0);
}

.photo-title {
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.photo-desc {
    color: #ddd;
    font-size: 0.9rem;
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
    font-size: 1.2rem;
    display: none;
}

.loading.show {
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }
    
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .photo-item {
        height: 200px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }
    
    .gallery {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .photo-item {
        height: 250px;
    }
}

/* 光效装饰元素 */
.gallery::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 20%, rgba(0, 0, 0, 0.4) 100%);
    pointer-events: none;
    z-index: -1;
}

/* 照片边框光效 */
.photo-item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 15px;
    box-shadow: inset 0 0 15px rgba(255, 255, 255, 0.2);
    pointer-events: none;
    z-index: 2;
}

/* 滤镜效果选择器 */
.filter-options {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.filter-btn:hover, .filter-btn.active {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 图片滤镜效果 */
.grayscale img { filter: grayscale(100%); }
.sepia img { filter: sepia(80%); }
.brightness img { filter: brightness(1.2); }
.contrast img { filter: contrast(120%); }
.saturate img { filter: saturate(150%); }
.huerotate img { filter: hue-rotate(90deg); }
.invert img { filter: invert(100%); }
.blur img { filter: blur(2px); }