:root {
            --primary: #2563eb;
            --secondary: #1e40af;
            --accent: #3b82f6;
            --light: #f8fafc;
            --dark: #1e293b;
            --gray: #64748b;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background-color: #f1f5f9;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 100px 20px 20px 20px;
        }

        #about_header {
            background: #333;
            color: white;
            padding: 60px 20px;
            text-align: center;
            border-radius: 0 0 20px 20px;
            margin-bottom: 40px;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

        h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            color: #fff;
        }

        .header-subtitle {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
            opacity: 0.9;
            color: #fff;
        }

        .features-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }

        .feature-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

        .feature-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .feature-content {
            padding: 25px;
        }

        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--primary);
        }

        .feature-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--secondary);
        }

        .feature-desc {
            color: var(--gray);
            margin-bottom: 20px;
        }

        .cta-section {
            background: white;
            padding: 60px 20px;
            text-align: center;
            border-radius: 20px;
            margin-bottom: 40px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }

        .cta-title {
            font-size: 2rem;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .cta-button {
            display: inline-block;
            background: #333;
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            transition: background 0.3s ease;
            margin-top: 20px;
        }

        .cta-button:hover {
            background: var(--secondary);
            color: #fff;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }

            .features-container {
                grid-template-columns: 1fr;
            }
        }