* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            transition: background-color 0.5s ease, color 0.3s ease;
        }
        
        :root {
            --primary-bg: #f5f5f5;
            --secondary-bg: #ffffff;
            --text-color: #333333;
            --text-secondary: #666666;
            --card-bg: #ffffff;
            --card-border: #e0e0e0;
            --tag-bg: #f0f0f0;
            --tag-color: #555555;
            --header-bg: #f0f0f0;
            --shadow-color: rgba(0, 0, 0, 0.08);
            --accent-color: #4a6fa5;
            --search-bg: #ffffff;
            --header-height: 80px;
        }
        
        .dark-mode {
            --primary-bg: #2a2a2a;
            --secondary-bg: #333333;
            --text-color: #e0e0e0;
            --text-secondary: #aaaaaa;
            --card-bg: #3a3a3a;
            --card-border: #444444;
            --tag-bg: #444444;
            --tag-color: #cccccc;
            --header-bg: #222222;
            --shadow-color: rgba(0, 0, 0, 0.2);
            --accent-color: #6a95cc;
            --search-bg: #444444;
        }
        
        body {
            background-color: var(--primary-bg);
            min-height: 100vh;
            padding: 20px;
            color: var(--text-color);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
        }
        
        /* Header样式 */
        header {
            background: var(--header-bg);
            border-radius: 15px;
            padding: 0 30px;
            margin-bottom: 30px;
            box-shadow: 0 4px 12px var(--shadow-color);
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent-color);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .logo i {
            font-size: 1.6rem;
        }
        
        .theme-switcher {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .theme-label {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
        }
        
        .switch {
            position: relative;
            display: inline-block;
            width: 60px;
            height: 34px;
        }
        
        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        
        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 34px;
        }
        
        .slider:before {
            position: absolute;
            content: "";
            height: 26px;
            width: 26px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }
        
        input:checked + .slider {
            background-color: var(--accent-color);
        }
        
        input:checked + .slider:before {
            transform: translateX(26px);
        }
        
        .theme-icons {
            display: flex;
            gap: 15px;
            margin: 0 10px;
        }
        
        .theme-icons i {
            font-size: 1.3rem;
        }
        
        .fa-sun {
            color: #f39c12;
        }
        
        .fa-moon {
            color: #3498db;
        }
        
        .content-header {
            text-align: center;
            padding: 30px 0 20px;
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            color: var(--text-color);
            font-weight: 600;
        }
        
        .subtitle {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 10px auto 0;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        
        .search-container {
            background: var(--search-bg);
            border-radius: 10px;
            padding: 5px;
            max-width: 700px;
            margin: 30px auto;
            display: flex;
            box-shadow: 0 5px 15px var(--shadow-color);
            border: 1px solid var(--card-border);
            transition: all 0.3s ease;
        }
        
        .search-container:focus-within {
            box-shadow: 0 8px 20px var(--shadow-color);
        }
        
        #search-input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 18px 20px;
            font-size: 1.1rem;
            outline: none;
            color: var(--text-color);
        }
        
        #search-input::placeholder {
            color: var(--text-secondary);
        }
        
        #search-btn {
            background: var(--accent-color);
            color: white;
            border: none;
            border-radius: 8px;
            padding: 0 30px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        #search-btn:hover {
            opacity: 0.9;
        }
        
        .stats {
            text-align: center;
            margin: 15px 0;
            font-size: 1.1rem;
            color: var(--text-secondary);
        }
        
        .stats span {
            font-weight: 600;
            color: var(--accent-color);
        }
        
        .cards-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }
        
        .card {
            background: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px var(--shadow-color);
            transition: all 0.3s ease;
            opacity: 0;
            animation: fadeIn 0.5s forwards;
            border: 1px solid var(--card-border);
            display: flex;
            flex-direction: column;
            height: 100%;
            cursor: pointer;
            position: relative;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px var(--shadow-color);
        }
        
        /* 卡片点击效果 */
        .card::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0.05);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .card:hover::after {
            opacity: 1;
        }
        
        /* 图片区域 - 占卡片的3/5高度 */
        .card-img {
            height: 60%; /* 卡片高度的3/5 */
            width: 100%;
            overflow: hidden;
            position: relative;
            border-bottom: 1px solid var(--card-border);
        }
        
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        
        .card-content {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        
        .card-title {
            font-size: 1.4rem;
            margin-bottom: 12px;
            color: var(--text-color);
            font-weight: 600;
        }
        
        .card-desc {
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 15px;
            flex-grow: 1;
        }
        
        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }
        
        .tag {
            background: var(--tag-bg);
            color: var(--tag-color);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        .card-id {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--accent-color);
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            font-weight: bold;
            z-index: 2;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        }
        
        .no-results {
            grid-column: 1 / -1;
            text-align: center;
            background: var(--card-bg);
            padding: 50px 30px;
            border-radius: 15px;
            font-size: 1.2rem;
            color: var(--text-secondary);
            box-shadow: 0 5px 15px var(--shadow-color);
            border: 1px solid var(--card-border);
        }
        
        .no-results i {
            font-size: 3rem;
            margin-bottom: 20px;
            color: var(--accent-color);
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @media (max-width: 768px) {
            header {
                flex-direction: column;
                height: auto;
                padding: 20px;
                gap: 20px;
            }
            
            .logo {
                font-size: 1.6rem;
            }
            
            .search-container {
                margin: 20px;
                flex-direction: column;
                border-radius: 12px;
            }
            
            #search-input {
                padding: 16px;
                border-bottom: 1px solid var(--card-border);
            }
            
            #search-btn {
                padding: 14px;
                justify-content: center;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .subtitle {
                font-size: 1rem;
                padding: 0 20px;
            }
            
            .cards-container {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
        }
        
        /* 护眼优化 */
        body {
            line-height: 1.6;
        }
        
        .card-title, .card-desc {
            letter-spacing: 0.3px;
        }
        
        .sort-indicator {
            text-align: center;
            margin: 10px 0 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        
        .sort-indicator i {
            color: var(--accent-color);
            margin-right: 5px;
        }