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

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

header {
    background: #ffcc00;
    color: #1a1a1a;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #1a1a1a;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    height: 2.5rem;
    width: auto;
}

nav a {
    color: #1a1a1a;
    margin-left: 2rem;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #e0e0e0;
    line-height: 1.8;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #ffcc00, #ff9900);
    color: #1a1a1a;
    padding: 1rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(255, 204, 0, 0.3);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 204, 0, 0.4);
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #b0b0b0;
}

.badge::before {
    content: "✓";
    color: #ffcc00;
    font-weight: bold;
    font-size: 1.2rem;
}

/* Features Section */
.features {
    padding: 4rem 0;
    background: white;
    margin-top: 3rem;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #1a1a1a;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: #f8f8f8;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid #e0e0e0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    border-color: #ffcc00;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #1a1a1a;
}

.feature-card p {
    color: #666;
    font-size: 0.95rem;
}

/* Content Section */
.content-section {
    padding: 4rem 0;
    background: white;
    border-bottom: 1px solid #e0e0e0;
}

.content-header {
    font-size: 1.8rem;
    color: #1a1a1a;
    margin-bottom: 1.5rem;
}

.content-text {
    color: #555;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.content-subsection {
    margin-bottom: 2rem;
}

.content-subsection h3 {
    color: #ff9900;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

/* Specs Table */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
}

.specs-table th {
    background: #f8f8f8;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: #1a1a1a;
    border-bottom: 2px solid #e0e0e0;
}

.specs-table td {
    padding: 1rem;
    border-bottom: 1px solid #f0f0f0;
}

.specs-table tr:last-child td {
    border-bottom: none;
}

.specs-table tr:hover {
    background: #fafafa;
}

/* Installation Steps */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.step {
    background: #f8f8f8;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #ffcc00;
}

.step-number {
    display: inline-block;
    background: #ffcc00;
    color: #1a1a1a;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    text-align: center;
    line-height: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.step h4 {
    color: #1a1a1a;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

/* Content Categories */
.categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.category-item {
    background: linear-gradient(135deg, #ffcc00, #ff9900);
    color: #1a1a1a;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    font-weight: 600;
    transition: all 0.3s;
}

.category-item:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(255, 204, 0, 0.3);
}

/* FAQ Section */
.faq {
    padding: 4rem 0;
    background: #f8f8f8;
}

.faq-item {
    background: white;
    margin-bottom: 1rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: #1a1a1a;
    background: white;
    transition: background 0.3s;
}

.faq-question:hover {
    background: #fafafa;
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    color: #ffcc00;
    transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1.5rem;
    color: #666;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 1.5rem;
}

/* Footer */
footer {
    background: #1a1a1a;
    color: #999;
    padding: 2rem;
    text-align: center;
    font-size: 0.9rem;
    border-top: 1px solid #333;
}

/* Image Section */
.image-showcase {
    margin: 2rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.image-showcase img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.image-showcase img:hover {
    transform: scale(1.02);
}

/* Responsive */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .categories {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

    nav a {
        margin-left: 1rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .security-badges {
        gap: 1rem;
    }

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

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

    .cta-button {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }

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

    nav {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    nav a {
        margin-left: 0;
        font-size: 0.85rem;
    }
}