* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

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

        .tfci-header {
            background: linear-gradient(135deg, #25D366, #128C7E);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .tfci-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }

        .tfci-logo {
            display: flex;
            align-items: center;
            color: white;
            text-decoration: none;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .tfci-logo img {
            height: 40px;
            margin-right: 10px;
        }

        .tfci-nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .tfci-nav-link {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }

        .tfci-nav-link:hover {
            background-color: rgba(255,255,255,0.1);
            color: #f0f0f0;
        }

        .tfci-hero {
            background: linear-gradient(135deg, #25D366, #128C7E);
            color: white;
            padding: 4rem 0;
            text-align: center;
        }

        .tfci-hero-title {
            font-size: 3rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .tfci-hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .tfci-hero-cta {
            background-color: white;
            color: #25D366;
            padding: 1rem 2rem;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .tfci-hero-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }

        .tfci-main-content {
            padding: 4rem 0;
        }

        .tfci-section {
            margin-bottom: 4rem;
        }

        .tfci-section-title {
            font-size: 2.5rem;
            color: #25D366;
            margin-bottom: 2rem;
            text-align: center;
        }

        .tfci-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .tfci-feature-card {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .tfci-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }

        .tfci-feature-icon {
            font-size: 3rem;
            color: #25D366;
            margin-bottom: 1rem;
        }

        .tfci-feature-title {
            font-size: 1.5rem;
            color: #333;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .tfci-feature-desc {
            color: #666;
            line-height: 1.6;
        }

        .tfci-compatibility {
            background: white;
            padding: 3rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            margin: 3rem 0;
        }

        .tfci-compatibility-title {
            font-size: 2rem;
            color: #25D366;
            margin-bottom: 2rem;
            text-align: center;
        }

        .tfci-compatibility-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
        }

        .tfci-compatibility-item {
            display: flex;
            align-items: center;
            padding: 1rem;
            background: #f8f9fa;
            border-radius: 10px;
            border-left: 4px solid #25D366;
        }

        .tfci-compatibility-icon {
            color: #25D366;
            font-size: 1.5rem;
            margin-right: 1rem;
        }

        .tfci-install-guide {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            padding: 3rem;
            border-radius: 15px;
            margin: 3rem 0;
        }

        .tfci-install-title {
            font-size: 2rem;
            color: #25D366;
            margin-bottom: 2rem;
            text-align: center;
        }

        .tfci-install-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .tfci-install-step {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 3px 15px rgba(0,0,0,0.1);
        }

        .tfci-step-number {
            background: #25D366;
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: bold;
            margin: 0 auto 1rem;
        }

        .tfci-step-title {
            font-size: 1.2rem;
            color: #333;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .tfci-step-desc {
            color: #666;
            line-height: 1.5;
        }

        .tfci-cta-section {
            background: linear-gradient(135deg, #25D366, #128C7E);
            color: white;
            padding: 4rem 0;
            text-align: center;
            margin: 4rem 0;
        }

        .tfci-cta-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .tfci-cta-desc {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }

        .tfci-cta-button {
            background-color: white;
            color: #25D366;
            padding: 1.2rem 3rem;
            border: none;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            margin: 0 1rem;
        }

        .tfci-cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
        }

        .tfci-footer {
            background: #2c3e50;
            color: white;
            padding: 3rem 0 1rem;
        }

        .tfci-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .tfci-footer-section h3 {
            color: #25D366;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }

        .tfci-footer-section p,
        .tfci-footer-section a {
            color: #bdc3c7;
            text-decoration: none;
            line-height: 1.8;
        }

        .tfci-footer-section a:hover {
            color: #25D366;
        }

        .tfci-footer-bottom {
            border-top: 1px solid #34495e;
            padding-top: 1rem;
            text-align: center;
            color: #95a5a6;
        }

        @media (max-width: 768px) {
            .tfci-nav-menu {
                flex-direction: column;
                gap: 1rem;
            }

            .tfci-hero-title {
                font-size: 2rem;
            }

            .tfci-hero-subtitle {
                font-size: 1.1rem;
            }

            .tfci-section-title {
                font-size: 2rem;
            }

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

            .tfci-install-steps {
                grid-template-columns: 1fr;
            }

            .tfci-compatibility-list {
                grid-template-columns: 1fr;
            }
        }