* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
        }
        
        body {
            background-color: #f0f5fc;
            color: #2c3e50;
            line-height: 1.6;
            padding-bottom: 40px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        /* Header Styling */
        .header {
            background: linear-gradient(135deg, #0d3666 0%, #082a4d 100%);
            color: white;
            padding: 35px 0;
            border-radius: 22px;
            margin-bottom: 35px;
            text-align: center;
            box-shadow: 0 12px 24px rgba(8, 42, 77, 0.2);
        }
        
        .header h1 {
            font-size: 2.6rem;
            margin-bottom: 12px;
            font-weight: 700;
            letter-spacing: -0.5px;
        }
        
        .header p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
            line-height: 1.5;
        }
        
        /* Content Card Styling */
        .card {
            background: white;
            border-radius: 20px;
            padding: 32px;
            margin-bottom: 32px;
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
            border: 1px solid #e6edf5;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 14px 28px rgba(0, 0, 0, 0.09);
        }
        
        .section-title {
            color: #0d3666;
            font-size: 1.9rem;
            margin-bottom: 22px;
            padding-bottom: 14px;
            border-bottom: 2px solid #eef4fd;
            display: flex;
            align-items: center;
        }
        
        .section-title i {
            margin-right: 12px;
            background-color: #e8f0fa;
            padding: 12px;
            border-radius: 12px;
            color: #0d3666;
        }
        
        /* Product Introduction Area */
        .product-section {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }
        
        .product-card {
            flex: 1;
            min-width: 300px;
        }
        
        .product-content {
            display: flex;
            flex-direction: column;
        }
        
        /* Product Image Frame - Adjustable */
        .product-img-frame {
            background-color: #f0f7ff;
            border-radius: 16px;
            margin-bottom: 24px;
            border: 2px dashed #b8d0f0;
            color: #3a6fb3;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            min-height: 280px; /* Increased default minimum height */
            max-height: 450px; /* Increased maximum height */
            display: flex;
            flex-direction: column;
        }
        
        .product-img-frame:hover {
            background-color: #e6f0ff;
            border-color: #3a6fb3;
        }
        
        .product-img-frame .frame-header {
            padding: 15px;
            background-color: rgba(232, 240, 250, 0.8);
            border-bottom: 1px dashed #b8d0f0;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .product-img-frame .frame-content {
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .product-img-frame i {
            font-size: 3.8rem; /* Increased icon size */
            margin-bottom: 18px;
            opacity: 0.8;
        }
        
        .product-img-frame .image-preview {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
            border-radius: 8px;
            display: none; /* Hidden by default, shown when image is loaded */
        }
        
        /* Frame Controls */
        .frame-controls {
            display: flex;
            gap: 10px;
            margin-top: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .size-btn {
            background-color: #e8f0fa;
            border: none;
            padding: 8px 16px;
            border-radius: 20px;
            cursor: pointer;
            font-size: 0.9rem;
            color: #0d3666;
            transition: all 0.2s ease;
        }
        
        .size-btn:hover {
            background-color: #d0e0f5;
        }
        
        .size-btn.active {
            background-color: #0d3666;
            color: white;
        }
        
        /* Table Styling */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            border-radius: 18px;
            overflow: hidden;
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
            margin: 28px 0;
        }
        
        .comparison-table th {
            background-color: #0d3666;
            color: white;
            padding: 20px 16px;
            text-align: center;
            font-weight: 600;
            font-size: 1.05rem;
        }
        
        .comparison-table td {
            padding: 18px 16px;
            text-align: center;
            border-bottom: 1px solid #eef4fd;
        }
        
        .comparison-table tr:nth-child(even) {
            background-color: #f8fbfe;
        }
        
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        
        .white-agent {
            background-color: rgba(255, 255, 255, 0.95);
            font-weight: 600;
            color: #0d3666;
        }
        
        .yellow-agent {
            background-color: rgba(255, 240, 180, 0.95);
            font-weight: 600;
            color: #9c7a00;
        }
        
        /* Particle Size Section */
        .particle-size-section {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 25px;
        }
        
        .particle-info {
            flex: 1;
            min-width: 300px;
        }
        
        .particle-visual {
            flex: 1;
            min-width: 300px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .particle-scale {
            display: flex;
            align-items: flex-end;
            justify-content: center;
            margin-top: 20px;
            height: 180px;
            width: 100%;
        }
        
        .particle-bar {
            margin: 0 15px;
            text-align: center;
            transition: transform 0.3s ease;
        }
        
        .particle-bar:hover {
            transform: translateY(-5px);
        }
        
        .bar {
            width: 40px;
            border-radius: 8px 8px 0 0;
            margin-bottom: 10px;
        }
        
        .fine-particle {
            height: 120px;
            background: linear-gradient(to top, #4a90e2, #2c6cb0);
        }
        
        .medium-particle {
            height: 80px;
            background: linear-gradient(to top, #7bb0e8, #4a90e2);
        }
        
        .coarse-particle {
            height: 50px;
            background: linear-gradient(to top, #a8d0ff, #7bb0e8);
        }
        
        /* Application Images Area */
        .applications-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
            margin-top: 24px;
        }
        
        .app-card {
            background: white;
            border-radius: 18px;
            overflow: hidden;
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
            border: 1px solid #e6edf5;
            transition: transform 0.3s ease;
        }
        
        .app-card:hover {
            transform: translateY(-5px);
        }
        
        /* Application Image Frame - Adjustable */
        .app-img-frame {
            height: 240px; /* Increased default height */
            background-color: #f0f7ff;
            display: flex;
            flex-direction: column;
            border-bottom: 1px solid #e6edf5;
            color: #3a6fb3;
            font-weight: 500;
            position: relative;
            overflow: hidden;
        }
        
        .app-img-frame .frame-header {
            padding: 12px;
            background-color: rgba(232, 240, 250, 0.8);
            border-bottom: 1px dashed #b8d0f0;
        }
        
        .app-img-frame .frame-content {
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 15px;
        }
        
        .app-img-frame i {
            font-size: 3rem; /* Increased icon size */
            margin-bottom: 16px;
            opacity: 0.8;
        }
        
        .app-img-frame .image-preview {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
            border-radius: 8px;
            display: none; /* Hidden by default, shown when image is loaded */
        }
        
        .app-content {
            padding: 22px;
        }
        
        .app-title {
            color: #0d3666;
            font-weight: 600;
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        
        /* Footer Information */
        .footer {
            text-align: center;
            margin-top: 45px;
            color: #5a6c7d;
            font-size: 0.95rem;
        }
        
        .contact-btn {
            display: inline-block;
            background: linear-gradient(to right, #0d3666, #082a4d);
            color: white;
            padding: 16px 36px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            margin-top: 24px;
            box-shadow: 0 6px 18px rgba(13, 54, 102, 0.3);
            transition: all 0.3s ease;
            font-size: 1.05rem;
        }
        
        .contact-btn:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 24px rgba(13, 54, 102, 0.4);
            background: linear-gradient(to right, #0e3c72, #09305c);
        }
        
        /* Bullet Points */
        ul {
            padding-left: 24px;
            margin: 15px 0;
        }
        
        li {
            margin-bottom: 8px;
            position: relative;
        }
        
        li:before {
            content: "•";
            color: #0d3666;
            font-weight: bold;
            display: inline-block;
            width: 1em;
            margin-left: -1em;
        }
        
        /* Image Upload Controls */
        .upload-controls {
            margin-top: 15px;
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        
        .upload-btn {
            background-color: #0d3666;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 20px;
            cursor: pointer;
            font-size: 0.9rem;
            transition: all 0.2s ease;
        }
        
        .upload-btn:hover {
            background-color: #0e3c72;
        }
        
        .reset-btn {
            background-color: #f0f7ff;
            color: #0d3666;
            border: 1px solid #b8d0f0;
            padding: 8px 16px;
            border-radius: 20px;
            cursor: pointer;
            font-size: 0.9rem;
            transition: all 0.2s ease;
        }
        
        .reset-btn:hover {
            background-color: #e6f0ff;
        }
        
        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .header h1 {
                font-size: 2.1rem;
            }
            
            .header p {
                font-size: 1.05rem;
            }
            
            .product-section {
                flex-direction: column;
            }
            
            .comparison-table {
                font-size: 0.92rem;
            }
            
            .comparison-table th, 
            .comparison-table td {
                padding: 14px 10px;
            }
            
            .card {
                padding: 24px;
            }
            
            .section-title {
                font-size: 1.6rem;
            }
            
            .product-img-frame {
                min-height: 240px;
            }
            
            .app-img-frame {
                height: 220px;
            }
            
            .upload-controls {
                flex-direction: column;
                align-items: center;
            }
            
            .particle-size-section {
                flex-direction: column;
            }
        }
        
        @media (max-width: 480px) {
            .product-img-frame {
                min-height: 220px;
            }
            
            .app-img-frame {
                height: 200px;
            }
            
            .frame-controls {
                flex-direction: column;
                align-items: center;
            }
        }