:root {
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-main: #212529;
    --text-secondary: #6c757d;
    --accent: #0f172a;
    --accent-hover: #334155;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: clamp(10px, 2vw, 24px);
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.header-left h2 {
    font-weight: 600;
    font-size: clamp(16px, 1.5vw, 22px);
    margin: 0;
}

.stats {
    font-size: clamp(11px, 1vw, 13px);
    color: var(--text-secondary);
    margin-top: 2px;
}

.filter-toggle-btn {
    background: #fff;
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--text-main);
    transition: background 0.2s;
}
.filter-toggle-btn:hover { background: #f1f5f9; }

/* 分类标签导航栏 */
.category-bar {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 12px;
    margin-bottom: 16px;
    white-space: nowrap;
}
.category-tab {
    padding: 6px 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}
.category-tab:hover { border-color: var(--accent); color: var(--text-main); }
.category-tab.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    font-weight: 500;
}

/* 筛选面板样式 */
.filter-panel {
    background: #fff;
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}
.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-end;
}
.filter-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}
.filter-group select, .filter-group input {
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    font-size: 13px;
    outline: none;
    background: #fff;
}
.filter-actions {
    display: flex;
    gap: 8px;
}
.btn-primary { background: var(--accent); color: #fff; border: none; padding: 7px 14px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); padding: 7px 14px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.btn-outline:hover { background: #f8fafc; color: var(--text-main); }

/* 响应式网格 */
.gallery {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: clamp(8px, 1.5vw, 16px);
    padding-bottom: 80px;
}

@media (max-width: 1400px) { .gallery { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 1100px) { .gallery { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 850px) { .gallery { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 550px) { .gallery { grid-template-columns: repeat(2, 1fr); gap: 8px; } }

.image-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.image-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.image-wrapper {
    width: 100%;
    height: clamp(120px, 14vw, 180px);
    background: #f1f5f9;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border-radius: 12px;
    touch-action: manipulation;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 12px;
    transition: transform 0.3s ease;
    touch-action: manipulation;
}

.image-card:hover img { transform: scale(1.03); }

.image-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: opacity 0.2s ease;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    padding: 8px;
    border-radius: 12px;
    z-index: 5;
}

.image-card:hover .image-overlay,
.image-card.touch-active .image-overlay { opacity: 1; }

.menu-btn {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    border: none;
    transition: background 0.2s, transform 0.2s;
    position: relative;
    z-index: 10;
}
.menu-btn:hover { background: #ffffff; transform: scale(1.05); }
.menu-btn .material-symbols-outlined { font-size: 16px; color: #1f1f1f; }

.dropdown-menu {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(6px);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    display: none;
    flex-direction: column;
    z-index: 20;
    overflow: hidden;
    min-width: 110px;
    border: 1px solid rgba(226, 232, 240, 0.8);
}
.dropdown-menu.show { display: flex; }
.dropdown-item {
    padding: 6px 10px;
    font-size: 11px;
    color: #1f1f1f;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    text-decoration: none;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    transition: background 0.15s;
    white-space: nowrap;
}
.dropdown-item:hover { background: rgba(0, 0, 0, 0.05); }
.dropdown-item .material-symbols-outlined { font-size: 14px; color: #333; }

/* 模态弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 16px;
}
.modal-overlay.show { display: flex; }
.modal-box {
    background: #fff;
    padding: 20px;
    border-radius: 16px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.15);
}
.modal-box h3 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.modal-info-item {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    gap: 12px;
}
.modal-info-label { color: var(--text-secondary); flex-shrink: 0; }
.modal-info-value { color: var(--text-main); font-weight: 500; text-align: right; word-break: break-all; }
.modal-close-btn {
    width: 100%;
    margin-top: 20px;
    padding: 10px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

/* 全屏查看器 */
.fullscreen-viewer {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    cursor: zoom-out;
}
.fullscreen-viewer.show { display: flex; }
.fullscreen-viewer img { max-width: 95vw; max-height: 95vh; object-fit: contain; border-radius: 4px; }

/* 悬浮上传按钮 */
.fab-container { position: fixed; right: 24px; bottom: 24px; z-index: 999; }
.fab-btn {
    background: var(--accent);
    color: #fff;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    border: none;
    transition: background 0.2s, transform 0.2s;
}
.fab-btn:hover { background: var(--accent-hover); transform: scale(1.05); }
.fab-btn .material-symbols-outlined { font-size: 24px; color: #ffffff; }
input[type="file"] { display: none; }

#toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #1e293b;
    color: #fff;
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 10000;
    pointer-events: none;
}
#toast.show { transform: translateX(-50%) translateY(0); }