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

:root {
    
    --primary-blue: #4169e1;      
    --dark-gray: #2b2b2b;         
    --light-bg: #fafafa;          
    --card-bg: #f9f9f9;           
    --text-dark: #333333;
    --text-medium: #555555;
    --text-light: #666666;
    --white: #ffffff;
    --border-color: #e8e8e8;
    --cta-bg: #e8f1ff;            

    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height: 1.7;

    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    
    --container-width: 720px;     
    --container-padding: 1.5rem;

    
    --radius-sm: 4px;
    --radius-md: 8px;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height);
    color: var(--text-dark);
    background-color: var(--white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary-blue);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}


.advertorial-label {
    background-color: var(--light-bg);
    text-align: center;
    padding: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}


.header {
    background-color: var(--white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--primary-blue);
    color: var(--white);
    padding: var(--spacing-sm);
}

.skip-link:focus {
    left: 0;
    z-index: 9999;
}


.main-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--container-padding);
}

.article-container {
    background-color: var(--white);
}


.hero-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-medium);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-image {
    display: none; 
}


.product-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--white);
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    margin: 0 auto var(--spacing-lg) auto;
    max-width: 250px;
}

.product-badge img {
    display: block;
    max-width: 100%;
    height: auto;
}


.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    background-color: var(--primary-blue);
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 auto;
}

.cta-button:hover {
    background-color: #365fb8;
    text-decoration: none;
    transform: translateY(-1px);
}

.cta-button::after {
    content: '→';
    font-size: 1.2rem;
}


.section-divider {
    display: none; 
}


.features-section,
.offer-section,
.getting-started-section {
    margin-bottom: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.features-section + .features-section {
    margin-top: var(--spacing-xl);
}

.features-section .cta-button {
    margin-top: var(--spacing-md);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.section-intro {
    text-align: center;
    color: var(--text-medium);
    margin-bottom: var(--spacing-xl);
    font-size: 1.063rem;
    line-height: 1.7;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}


.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md) var(--spacing-lg);
    margin-bottom: 0;
    max-width: 600px;
    width: 100%;
}

.feature-card {
    background-color: var(--card-bg);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: 0.938rem;
    color: var(--text-medium);
    line-height: 1.6;
}

.content-image {
    display: none; 
}


.offer-list,
.steps-list {
    list-style: none;
    margin: 0 auto var(--spacing-xl) auto;
    max-width: 600px;
}

.offer-item,
.step-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    line-height: 1.7;
}

.offer-item::before,
.step-item::before {
    content: '✓';
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    background-color: #4caf50;
    color: var(--white);
    border-radius: 3px;
    text-align: center;
    line-height: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.offer-icon,
.step-icon {
    display: none; 
}


.offer-section {
    background-color: var(--cta-bg);
    padding: var(--spacing-xxl) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
}

.offer-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.offer-subtitle {
    font-size: 1.125rem;
    color: var(--text-medium);
    margin-bottom: var(--spacing-lg);
}

.offer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--spacing-lg) auto;
}

.offer-logo img {
    max-width: 200px;
    height: auto;
}


.compatibility-section {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.compatibility-list {
    font-size: 1rem;
    color: var(--text-medium);
}


.security-image {
    display: none; 
}


.getting-started-section {
    text-align: center;
}

.getting-started-section .section-title {
    text-align: center;
}

.getting-started-section .steps-list {
    text-align: left;
}


.disclaimer {
    background-color: transparent;
    padding: var(--spacing-lg) 0;
    font-size: 0.875rem;
    color: var(--text-light);
    text-align: center;
    line-height: 1.6;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xxl);
}


.footer {
    background-color: var(--dark-gray);
    padding: var(--spacing-xl) var(--container-padding);
    margin-top: var(--spacing-xxl);
}

.footer-nav {
    max-width: var(--container-width);
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--white);
    font-size: 0.938rem;
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--primary-blue);
    text-decoration: none;
}

.footer-copyright {
    font-size: 0.875rem;
    color: #999;
    text-align: center;
}


.page-content {
    max-width: var(--container-width);
    margin: 0 auto;
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.page-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: var(--text-medium);
}

.page-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.page-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.contact-form-container {
    margin-top: var(--spacing-xxl);
    background-color: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
}

.contact-form-container h3 {
    margin-top: 0;
    text-align: center;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.submit-button {
    background-color: var(--primary-blue);
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    width: 100%;
    text-transform: uppercase;
}

.submit-button:hover {
    background-color: #365fb8;
}


@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .cta-button {
        padding: 0.875rem 2rem;
        font-size: 0.938rem;
    }
}


*:focus-visible {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}