/* ========================================
   素材图库（桌面端重构）样式
   - 图片流：6 张/行，16:9
   - 图片集：5 个/行
   ======================================== */

.gallery-page {
    max-width: none;
    margin: 0;
    padding: 100px 120px 60px;
    min-height: calc(100vh - 64px);
}

/* 素材图库顶栏沿用站点通用 .top-nav（左右 40px），与其他页面保持一致；
   内容区保持左右 120px 边距（与灵感页等一致） */

/* 页面标题 */
.gallery-header {
    text-align: center;
    margin-bottom: 32px;
}
.gallery-header h1 {
    font-family: var(--font-cn);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}
.gallery-header p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* 浏览模式切换 */
.gallery-mode-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 28px;
    padding: 5px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    width: fit-content;
}
.gallery-mode-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-cn);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.gallery-mode-btn svg { opacity: 0.7; }
.gallery-mode-btn:hover { color: var(--text-primary); }
.gallery-mode-btn.active {
    background: var(--accent);
    color: #fff;
}
.gallery-mode-btn.active svg { opacity: 1; }

/* ==================== 图片流网格 ==================== */
.gallery-stream-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}
.gallery-item {
    display: block;
    position: relative;
    aspect-ratio: 16 / 9;
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    transition: all 0.25s;
    cursor: pointer;
}
.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}
.gallery-item:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.15);
}
.gallery-item:hover img { transform: scale(1.05); }
.gallery-item-ph {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--text-muted);
}

/* ==================== 图片集网格 ==================== */
.gallery-collections-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.gallery-collection-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.25s;
}
.gallery-collection-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.15);
}
.gc-covers {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 4px;
    aspect-ratio: 16 / 9;
    background: var(--bg-elevated);
}
.gc-cover {
    background-size: cover;
    background-position: center;
    background-color: var(--bg-elevated);
}
.gc-cover-main { grid-row: 1 / 3; }
.gc-info { padding: 14px 16px; }
.gc-info-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.gc-title {
    font-family: var(--font-cn);
    font-size: 0.98rem;
    font-weight: 500;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.gc-arrow { color: var(--text-muted); flex: 0 0 auto; }
.gc-meta {
    margin-top: 6px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* ==================== 系列详情头部 ==================== */
.content-header { margin-bottom: 24px; }
.content-header .header-top { display: flex; align-items: center; }
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: var(--font-cn);
    font-size: 0.85rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.back-btn:hover { color: var(--text-primary); border-color: var(--accent); }
.page-subtitle {
    margin-top: 14px;
    font-family: var(--font-cn);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* 空状态 */
.gallery-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* loading */
.loading {
    text-align: center;
    padding: 40px 0;
}
.loading .spinner {
    width: 34px; height: 34px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1400px) {
    .gallery-stream-grid { grid-template-columns: repeat(5, 1fr); }
    .gallery-collections-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 1100px) {
    .gallery-stream-grid { grid-template-columns: repeat(4, 1fr); }
    .gallery-collections-grid { grid-template-columns: repeat(3, 1fr); }
    .gallery-page { padding: 100px 60px 60px; }
    .gallery-nav { padding: 0 60px; }
}
@media (max-width: 820px) {
    .gallery-stream-grid { grid-template-columns: repeat(3, 1fr); }
    .gallery-collections-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
    .gallery-stream-grid { grid-template-columns: repeat(2, 1fr); }
    .gallery-page { padding: 90px 28px 40px; }
    .gallery-nav { padding: 0 28px; }
}