* {
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 0;
            background-image: url('/figs/Back.gif');
            background-repeat: repeat;
            background-attachment: fixed;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0;
        }
        
        .header {
            text-align: center;
            padding: 20px 20px 15px;
            margin: 0 20px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .header h1 {
            color: #2c3e50;
            margin: 0;
            font-size: 1.8em;
            font-weight: 600;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.05);
        }
        
        .language-toggle {
            position: absolute;
            top: 15px;
            right: 15px;
        }
        
        .language-toggle img {
            transition: transform 0.2s;
        }
        
        .language-toggle img:hover {
            transform: scale(1.1);
        }
        
        .navigation {
            text-align: center;
            margin: 0 20px 20px;
        }
        
        .navigation img {
            max-width: 100%;
            height: auto;
        }
        
        .notice {
            background: rgba(255, 230, 230, 0.95);
            border-left: 4px solid #ff4444;
            padding: 15px;
            margin: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }
        
        .content {
            margin: 0 20px 20px;
        }
        
        .usage-rules {
            background: rgba(255, 255, 255, 0.90);
            padding: 15px 20px;
            margin-bottom: 15px;
            border-radius: 12px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        }
        
        .usage-rules h2 {
            color: #2c3e50;
            font-size: 1.5em;
            margin-top: 0;
            margin-bottom: 10px;
            border-bottom: 2px solid #3498db;
            padding-bottom: 6px;
        }
        
        .old-layout {
            background: rgba(240, 248, 255, 0.85);
            padding: 12px;
            border-radius: 8px;
            text-align: center;
            margin-bottom: 30px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        
        /* Data Cards Grid */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .data-card {
            background: rgba(255, 255, 255, 0.7);
            border-radius: 12px;
            padding: 15px;
            transition: none;
            border: 1px solid rgba(0,0,0,0.05);
        }
        
        /* Large vertical cards - also semi-transparent */
        .data-card-large {
            background: rgba(255, 255, 255, 0.7);
            grid-column: span 1;
        }
        
        /* Image container for data cards */
        .card-image {
            width: 100%;
            margin-bottom: 0;
            border-radius: 8px;
            overflow: hidden;
            background: #f0f0f0;
        }
        
        .card-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.3s ease;
        }
        
        /* Only images with links hover */
        a .card-image img:hover {
            transform: scale(1.05);
        }
        
        .card-image-placeholder {
            width: 100%;
            height: 200px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2em;
            font-weight: bold;
        }
        
        .data-card h3 {
            color: #2c3e50;
            font-size: 1.3em;
            margin-top: 0;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .data-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .data-card li {
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
        }
        
        .data-card li::before {
            content: "▸";
            position: absolute;
            left: 0;
            color: #3498db;
            font-weight: bold;
        }
        
        .data-card a {
            color: #2980b9;
            text-decoration: none;
            transition: color 0.2s;
        }
        
        .data-card a:hover {
            color: #3498db;
            text-decoration: underline;
        }
        
        .version-info {
            font-size: 0.85em;
            color: #7f8c8d;
            font-style: italic;
        }
        
        .sub-list {
            margin-top: 8px;
            padding-left: 15px;
            font-size: 0.9em;
        }
        
        .sub-list li::before {
            content: "•";
            color: #95a5a6;
        }
        

        /* Section Header Panels */
        .section-header {
            background: transparent;
            padding: 12px 30px;
            margin: 20px 0 12px 0;
            border-left: 5px solid #3498db;
            position: relative;
        }
        
        .section-header::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, rgba(52, 152, 219, 0.08) 0%, rgba(52, 152, 219, 0.02) 50%, transparent 100%);
            border-radius: 8px;
            z-index: -1;
        }
        
        .section-header h2 {
            margin: 0;
            color: #2c3e50;
            font-size: 1.6em;
            font-weight: 600;
            text-shadow: 1px 1px 2px rgba(255, 255, 255, 0.8);
        }
        
        .section-header p {
            margin: 8px 0 0 0;
            color: #555;
            font-size: 0.95em;
        }
        
        .footer {
            background: rgba(255, 255, 255, 0.90);
            margin: 20px;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            font-size: 0.9em;
            color: #555;
        }
        
        .acknowledgment {
            background: rgba(249, 249, 249, 0.6);
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 20px;
            border-left: 3px solid #3498db;
        }
        
        /* Responsive design */
        @media (max-width: 768px) {
            .container {
                margin: 0;
            }
            
            .header {
                margin: 10px;
                padding: 15px;
                flex-direction: column;
            }
            
            .content, .footer, .notice {
                margin: 10px;
                padding: 15px;
            }
            
            .header h1 {
                font-size: 1.5em;
            }
            
            .language-toggle {
                position: absolute;
                top: 10px;
                right: 10px;
            }
            
            .data-grid {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .data-card {
                padding: 18px;
            }
        }
        
        @media (max-width: 480px) {
            .header h1 {
                font-size: 1.5em;
            }
            
            .data-card h3 {
                font-size: 1.1em;
            }
        }