*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        
        :root {
            --primary: #1a5fb4;
            --primary-dark: #0d3b7a;
            --accent: #ff6b35;
            --bg: #f5f7fa;
            --card-bg: #ffffff;
            --text: #1a1a2e;
            --text-secondary: #5a5a7a;
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
            --radius: 16px;
        }
        
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        
        .header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 60px 20px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .header::before {
            content: '';
            position: absolute;
            top: -50%; left: -50%;
            width: 200%; height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 30px 30px;
            opacity: 0.3;
        }
        
        .header-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
        
        .header h1 {
            font-size: clamp(1.5rem, 5vw, 2.5rem);
            font-weight: 800;
            margin-bottom: 12px;
            line-height: 1.3;
            text-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        
        .header .subtitle {
            font-size: clamp(0.9rem, 3vw, 1.2rem);
            opacity: 0.9;
            margin-bottom: 20px;
        }
        
        .header .badge {
            display: inline-block;
            background: var(--accent);
            color: white;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-top: 10px;
            box-shadow: 0 4px 15px rgba(255,107,53,0.4);
        }
        
        .stats-bar {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        
        .stat-item { text-align: center; }
        .stat-number { font-size: 1.5rem; font-weight: 800; display: block; }
        .stat-label { font-size: 0.75rem; opacity: 0.8; }
        
        .breadcrumb {
            background: white;
            padding: 12px 20px;
            border-bottom: 1px solid #e8ecf1;
            font-size: 0.85rem;
            color: var(--text-secondary);
            overflow-x: auto;
            white-space: nowrap;
        }
        
        .breadcrumb a { color: var(--primary); text-decoration: none; }
        .breadcrumb span { margin: 0 8px; color: #ccc; }
        
        .main { max-width: 1400px; margin: 0 auto; padding: 20px 16px 60px; }
        
        .filter-bar {
            display: flex;
            gap: 10px;
            overflow-x: auto;
            padding: 10px 0 20px;
            margin-bottom: 10px;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        
        .filter-bar::-webkit-scrollbar { display: none; }
        
        .filter-btn {
            flex-shrink: 0;
            padding: 8px 18px;
            border: 1px solid #e0e4e8;
            background: white;
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s;
            font-family: inherit;
        }
        
        .filter-btn.active, .filter-btn:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(26,95,180,0.3);
        }
        
        .waterfall { column-count: 2; column-gap: 12px; }
        
        @media (min-width: 640px) { .waterfall { column-count: 2; column-gap: 16px; } }
        @media (min-width: 768px) { 
            .waterfall { column-count: 3; column-gap: 20px; } 
            .main { padding: 30px 24px 80px; }
        }
        @media (min-width: 1024px) { .waterfall { column-count: 4; column-gap: 24px; } }
        
        .photo-card {
            break-inside: avoid;
            margin-bottom: 12px;
            background: var(--card-bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            position: relative;
        }
        
        @media (min-width: 768px) { .photo-card { margin-bottom: 20px; } }
        
        .photo-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        
        .photo-card.hidden { display: none; }
        
        .photo-wrapper {
            position: relative;
            overflow: hidden;
            background: #f0f2f5;
        }
        
        .photo-wrapper img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
            border-radius: var(--radius) var(--radius) 0 0;
        }
        
        .photo-card:hover .photo-wrapper img { transform: scale(1.05); }
        
        .photo-tag {
            position: absolute;
            top: 12px; left: 12px;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(10px);
            color: white;
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 500;
            z-index: 2;
        }
        
        .photo-info { padding: 14px; }
        @media (min-width: 768px) { .photo-info { padding: 18px; } }
        
        .photo-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        
        .photo-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-secondary);
        }
        
        .photo-meta .category {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        
        .photo-meta .category::before {
            content: '';
            width: 6px; height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }
        
        .lightbox {
            display: none;
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background: rgba(0,0,0,0.95);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            padding: 20px;
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .lightbox.active { display: flex; opacity: 1; }
        
        .lightbox-img {
            max-width: 100%;
            max-height: 85vh;
            object-fit: contain;
            border-radius: var(--radius);
            box-shadow: 0 20px 60px rgba(0,0,0,0.5);
        }
        
        .lightbox-close {
            position: absolute;
            top: 20px; right: 20px;
            width: 44px; height: 44px;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(10px);
            border: none;
            border-radius: 50%;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .lightbox-nav {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 50px; height: 50px;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(10px);
            border: none;
            border-radius: 50%;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .lightbox-prev { left: 15px; }
        .lightbox-next { right: 15px; }
        
        .lightbox-caption {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(0,0,0,0.7);
            backdrop-filter: blur(10px);
            color: white;
            padding: 10px 24px;
            border-radius: 24px;
            font-size: 0.9rem;
            text-align: center;
            max-width: 90%;
        }
        
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 50px 20px;
            text-align: center;
            margin-top: 40px;
            border-radius: 24px;
            margin: 40px 16px 0;
        }
        
        @media (min-width: 768px) {
            .cta-section { margin: 60px 24px 0; padding: 60px 40px; }
        }
        
        .cta-section h2 { font-size: clamp(1.2rem, 4vw, 1.8rem); margin-bottom: 12px; }
        .cta-section p { opacity: 0.9; margin-bottom: 24px; font-size: 0.95rem; }
        
        .cta-btn {
            display: inline-block;
            background: var(--accent);
            color: white;
            padding: 14px 36px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 6px 20px rgba(255,107,53,0.4);
            transition: all 0.3s;
        }
        
        .cta-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(255,107,53,0.5); }
        
        .footer {
            text-align: center;
            padding: 30px 20px;
            color: var(--text-secondary);
            font-size: 0.8rem;
        }
        
        .back-to-top {
            position: fixed;
            bottom: 30px; right: 20px;
            width: 48px; height: 48px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 50%;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(26,95,180,0.4);
            display: none;
            align-items: center;
            justify-content: center;
            z-index: 100;
        }
        
        .back-to-top.visible { display: flex; }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .photo-card { animation: fadeIn 0.6s ease forwards; }