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

    body {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        line-height: 1.6;
        color: #333;
        background-color: #fff;
    }

    .zt31tn-header {
        background: #fff;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
    }

    .zt31tn-nav {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 70px;
    }

    .zt31tn-logo img {
        height: 40px;
        width: auto;
    }

    .zt31tn-menu-toggle {
        display: none;
        flex-direction: column;
        background: none;
        border: none;
        cursor: pointer;
        padding: 5px;
    }

    .zt31tn-menu-toggle span {
        width: 25px;
        height: 3px;
        background: #333;
        margin: 3px 0;
        transition: 0.3s;
    }

    .zt31tn-nav-menu {
        display: flex;
        list-style: none;
        gap: 30px;
    }

    .zt31tn-nav-menu a {
        text-decoration: none;
        color: #333;
        font-weight: 500;
        transition: color 0.3s;
    }

    .zt31tn-nav-menu a:hover {
        color: #0088cc;
    }

    .zt31tn-nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 999;
    }

    .zt31tn-page-header {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 120px 0 60px;
        text-align: center;
    }

    .zt31tn-page-title {
        font-size: 3rem;
        font-weight: 700;
        margin-bottom: 20px;
    }

    .zt31tn-page-subtitle {
        font-size: 1.2rem;
        opacity: 0.9;
        max-width: 600px;
        margin: 0 auto;
    }

    .zt31tn-breadcrumb {
        background: #f8f9fa;
        padding: 15px 0;
    }

    .zt31tn-breadcrumb-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }

    .zt31tn-breadcrumb-nav {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
    }

    .zt31tn-breadcrumb-nav a {
        color: #666;
        text-decoration: none;
    }

    .zt31tn-breadcrumb-nav a:hover {
        color: #0088cc;
    }

    .zt31tn-breadcrumb-separator {
        color: #999;
    }

    .zt31tn-features-overview {
        padding: 80px 0;
        background: #f8f9fa;
    }

    .zt31tn-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }

    .zt31tn-section-title {
        text-align: center;
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 20px;
        color: #333;
    }

    .zt31tn-section-desc {
        text-align: center;
        font-size: 1.1rem;
        color: #666;
        margin-bottom: 60px;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    .zt31tn-features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 40px;
        margin-bottom: 80px;
    }

    .zt31tn-feature-card {
        background: white;
        padding: 40px;
        border-radius: 15px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .zt31tn-feature-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    }

    .zt31tn-feature-icon {
        font-size: 3rem;
        margin-bottom: 20px;
        display: block;
    }

    .zt31tn-feature-title {
        font-size: 1.5rem;
        font-weight: 600;
        margin-bottom: 15px;
        color: #333;
    }

    .zt31tn-feature-desc {
        color: #666;
        line-height: 1.7;
    }

    .zt31tn-stats-section {
        padding: 80px 0;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
    }

    .zt31tn-stats-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 40px;
        text-align: center;
    }

    .zt31tn-stat-item {
        padding: 20px;
    }

    .zt31tn-stat-number {
        font-size: 3rem;
        font-weight: 700;
        margin-bottom: 10px;
        display: block;
    }

    .zt31tn-stat-label {
        font-size: 1.1rem;
        opacity: 0.9;
    }

    .zt31tn-tech-section {
        padding: 80px 0;
        background: white;
    }

    .zt31tn-tech-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 40px;
    }

    .zt31tn-tech-card {
        padding: 40px;
        border: 2px solid #e9ecef;
        border-radius: 15px;
        transition: border-color 0.3s, transform 0.3s;
    }

    .zt31tn-tech-card:hover {
        border-color: #0088cc;
        transform: translateY(-3px);
    }

    .zt31tn-tech-title {
        font-size: 1.4rem;
        font-weight: 600;
        margin-bottom: 15px;
        color: #333;
    }

    .zt31tn-tech-desc {
        color: #666;
        line-height: 1.7;
    }

    .zt31tn-scenarios-section {
        padding: 80px 0;
        background: #f8f9fa;
    }

    .zt31tn-scenarios-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 30px;
    }

    .zt31tn-scenario-card {
        background: white;
        padding: 30px;
        border-radius: 12px;
        text-align: center;
        box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        transition: transform 0.3s;
    }

    .zt31tn-scenario-card:hover {
        transform: translateY(-3px);
    }

    .zt31tn-scenario-icon {
        font-size: 2.5rem;
        margin-bottom: 20px;
        display: block;
    }

    .zt31tn-scenario-title {
        font-size: 1.3rem;
        font-weight: 600;
        margin-bottom: 15px;
        color: #333;
    }

    .zt31tn-scenario-desc {
        color: #666;
        line-height: 1.6;
    }

    .zt31tn-comparison-section {
        padding: 80px 0;
        background: white;
    }

    .zt31tn-comparison-table {
        background: white;
        border-radius: 15px;
        overflow: hidden;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        margin-top: 40px;
    }

    .zt31tn-table {
        width: 100%;
        border-collapse: collapse;
    }

    .zt31tn-table th,
    .zt31tn-table td {
        padding: 20px;
        text-align: left;
        border-bottom: 1px solid #e9ecef;
    }

    .zt31tn-table th {
        background: #f8f9fa;
        font-weight: 600;
        color: #333;
    }

    .zt31tn-table td {
        color: #666;
    }

    .zt31tn-table .zt31tn-check {
        color: #28a745;
        font-weight: 600;
    }

    .zt31tn-table .zt31tn-cross {
        color: #dc3545;
        font-weight: 600;
    }

    .zt31tn-cta-section {
        padding: 80px 0;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        text-align: center;
    }

    .zt31tn-cta-title {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 20px;
    }

    .zt31tn-cta-desc {
        font-size: 1.2rem;
        margin-bottom: 40px;
        opacity: 0.9;
    }

    .zt31tn-cta-buttons {
        display: flex;
        gap: 20px;
        justify-content: center;
        flex-wrap: wrap;
    }

    .zt31tn-btn {
        display: inline-block;
        padding: 15px 30px;
        border-radius: 8px;
        text-decoration: none;
        font-weight: 600;
        transition: all 0.3s;
        border: 2px solid transparent;
    }

    .zt31tn-btn-primary {
        background: white;
        color: #667eea;
    }

    .zt31tn-btn-primary:hover {
        background: #f8f9fa;
        transform: translateY(-2px);
    }

    .zt31tn-btn-outline {
        background: transparent;
        color: white;
        border-color: white;
    }

    .zt31tn-btn-outline:hover {
        background: white;
        color: #667eea;
    }

    .zt31tn-footer {
        background: #2c3e50;
        color: white;
        padding: 60px 0 30px;
    }

    .zt31tn-footer-content {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 40px;
        margin-bottom: 40px;
    }

    .zt31tn-footer-section h3 {
        font-size: 1.2rem;
        margin-bottom: 20px;
        color: white;
    }

    .zt31tn-footer-section ul {
        list-style: none;
    }

    .zt31tn-footer-section ul li {
        margin-bottom: 10px;
    }

    .zt31tn-footer-section ul li a {
        color: #bdc3c7;
        text-decoration: none;
        transition: color 0.3s;
    }

    .zt31tn-footer-section ul li a:hover {
        color: white;
    }

    .zt31tn-footer-bottom {
        border-top: 1px solid #34495e;
        padding-top: 30px;
        text-align: center;
        color: #bdc3c7;
    }

    @media (max-width: 768px) {
        .zt31tn-menu-toggle {
            display: flex;
        }

        .zt31tn-nav-menu {
            display: none;
            position: fixed;
            top: 70px;
            left: 0;
            right: 0;
            background: white;
            flex-direction: column;
            padding: 20px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }

        .zt31tn-nav-menu.active {
            display: flex;
        }

        .zt31tn-page-title {
            font-size: 2rem;
        }

        .zt31tn-section-title {
            font-size: 2rem;
        }

        .zt31tn-features-grid {
            grid-template-columns: 1fr;
            gap: 30px;
        }

        .zt31tn-feature-card {
            padding: 30px;
        }

        .zt31tn-stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .zt31tn-tech-grid {
            grid-template-columns: 1fr;
        }

        .zt31tn-scenarios-grid {
            grid-template-columns: 1fr;
        }

        .zt31tn-cta-buttons {
            flex-direction: column;
            align-items: center;
        }

        .zt31tn-table {
            font-size: 14px;
        }

        .zt31tn-table th,
        .zt31tn-table td {
            padding: 15px 10px;
        }
    }

    @media (max-width: 480px) {
        .zt31tn-container {
            padding: 0 15px;
        }

        .zt31tn-page-title {
            font-size: 1.8rem;
        }

        .zt31tn-feature-card {
            padding: 25px;
        }

        .zt31tn-stats-grid {
            grid-template-columns: 1fr;
        }

        .zt31tn-stat-number {
            font-size: 2.5rem;
        }
    }