/* 基础重置与字体 */
:root {
    --bg-color: #0f0f11;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --border-color: #333;
}

body, html {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

/* 顶部文案区 */
.header {
    padding: 10vh 20px 6vh;
    text-align: center;
}

.header-content h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 4px;
    margin: 0 0 15px 0;
}

.header-content h1 span {
    font-weight: 700;
    color: #fff;
}

.header-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    letter-spacing: 1px;
}

/* 画廊网格布局 */
.gallery-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px 80px;
}

.gallery {
    display: grid;
    /* 自适应列，每列最小300px，充满可用空间 */
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    aspect-ratio: 4 / 5; /* 统一图片比例 */
    background-color: #1a1a1a;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94), filter 0.4s ease;
    filter: brightness(0.8);
}

/* 悬停精美交互 */
.gallery-item:hover img {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* 底部合规备案信息区域 */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 20px;
    text-align: center;
    background-color: #0a0a0c;
}

.beian-info {
    margin-bottom: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.beian-info a {
    color: #6b7280;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
}

.beian-info a:hover {
    color: #d1d5db;
}

.separator {
    color: #4b5563;
    font-size: 12px;
}

.gongan {
    display: flex;
    align-items: center;
}

.gongan-icon {
    width: 16px;
    height: 16px;
    margin-right: 6px;
    vertical-align: middle;
}

.copyright {
    color: #4b5563;
    font-size: 13px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 2rem;
    }
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
    }
    .beian-info {
        flex-direction: column;
        gap: 8px;
    }
    .separator {
        display: none;
    }
}