@charset "utf-8";
 
 
 
        
        .bt-body {
        
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            width: 90%;
           ；
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px 0;
        }
        
        /* Header & Hero Section */
        header {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        
        .material-hero {
            text-align: center;
            padding: 60px 20px;
      height: 60vh
        }
        
        .material-hero h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        
        .highlight {
            color: var(--accent);
            background: rgba(255,255,255,0.1);
            padding: 0 10px;
            border-radius: 4px;
        }
        
        .live-data {
            background: rgba(0,0,0,0.2);
            padding: 15px;
            border-radius: 8px;
            display: inline-flex;
            gap: 30px;
            margin-top: 20px;
            font-size: 1.2rem;
        }
        
        .live-data strong {
            color: var(--accent);
            font-weight: 700;
        }
        
        /* Table Styling */
        .param-table {
            width: 100%;
            border-collapse: collapse;
            margin: 40px 0;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border-radius: 10px;
            overflow: hidden;
        }
        
        .param-table th {
            background: var(--primary);
            color: white;
            padding: 15px;
            text-align: left;
        }
        
        .param-table td {
            padding: 15px;
            border-bottom: 1px solid #eee;
        }
        
        .param-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        .param-table tr:last-child td {
            border-bottom: none;
        }
        
        /* Material Case Section */
        .material-case {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 40px 0;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .material-case video {
            width: 100%;
            max-width: 800px;
            border-radius: 8px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            background: #eee;
            aspect-ratio: 16/9;
        }
        
        .material-case p {
            margin-top: 20px;
            font-size: 1.1rem;
            text-align: center;
            color: var(--dark);
            max-width: 700px;
        }
        
        /* Section Styling */
        .section-title {
            text-align: center;
            margin: 50px 0 30px;
            color:#111111;
            position: relative;
            padding-bottom: 15px;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: #0058c6;
            border-radius: 2px;
        }
        
        .section {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
        }
        
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin-top: 20px;
        }
        
        .card {
            background: white;
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .card h3 {
            color: var(--primary);
            margin-bottom: 15px;
            font-size: 1.4rem;
        }
        
        .icon {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--secondary);
        }
        
        /* Stats Section */
        .stats {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            margin: 40px 0;
            gap: 20px;
        }
        
        .stat-card {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 25px;
            border-radius: 10px;
            text-align: center;
            min-width: 200px;
            flex: 1;
        }
        
        .stat-card .number {
            font-size: 2.5rem;
            font-weight: bold;
            margin: 10px 0;
        }
        
        /* Process Steps */
        .process-steps {
            counter-reset: step-counter;
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        
        .step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding-left: 30px;
            position: relative;
        }
        
        .step::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0;
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
        }
        
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #0d2a4a);
            color: white;
            text-align: center;
            padding: 70px 20px;
            border-radius: 10px;
            margin: 50px 0;
        }
        
        .cta-section h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .cta-button {
            display: inline-block;
            background: white;
            color: white;
            padding: 15px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.2rem;
            margin-top: 20px;
            transition: all 0.3s ease;
            border: 2px solid var(--accent);
        }
        
        .cta-button:hover {
            background: transparent;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        
       
        
        
        
        /* Responsive */
        @media (max-width: 768px) {
            .material-hero h1 {
                font-size: 2rem;
            }
            
            .live-data {
                flex-direction: column;
                gap: 10px;
            }
            
            .stats {
                flex-direction: column;
            }
        }