/* Base Styles */
:root {
    --primary-color: #0099cc;
    --secondary-color: #005580;
    --accent-color: #ff9900;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-color: #6c757d;
    --light-gray-color: #e9ecef;
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fff;
}

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

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.3;
    font-weight: 700;
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

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

section {
    padding: 80px 0;
}

section:nth-child(even) {
    background-color: var(--light-color);
}

.section-intro {
    max-width: 800px;
    margin: 0 auto 40px;
    text-align: center;
    font-size: 1.1rem;
}

/* Header */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo h1 {
    font-size: 1.8rem;
    margin-bottom: 0;
    color: var(--primary-color);
}

.logo p {
    font-size: 0.9rem;
    margin-bottom: 0;
    color: var(--gray-color);
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

nav ul li a:hover {
    color: var(--primary-color);
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: #fff;
    text-align: center;
    padding: 120px 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.hero h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: #fff;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

.cta-button:hover {
    background-color: #e68a00;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* About Section */
.about .content-wrapper {
    display: flex;
    align-items: center;
    gap: 40px;
}

.about .text-content {
    flex: 1;
}

.about .image-content {
    flex: 1;
}

.placeholder-image {
    background-color: var(--light-gray-color);
    border-radius: 8px;
    height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--gray-color);
}

.placeholder-image i {
    font-size: 3rem;
    margin-bottom: 10px;
}

/* Benefits Section */
.benefits h2 {
    text-align: center;
    margin-bottom: 50px;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.benefit-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.benefit-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

/* Applications Section */
.applications h2 {
    text-align: center;
    margin-bottom: 30px;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.application-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.application-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.application-card .placeholder-image {
    height: 200px;
    border-radius: 8px 8px 0 0;
    background-color: var(--primary-color);
    color: #fff;
}

.application-card .placeholder-image i {
    font-size: 3rem;
}

.application-card h3 {
    padding: 20px 20px 10px;
    font-size: 1.2rem;
}

.application-card p {
    padding: 0 20px 20px;
    color: var(--gray-color);
}

/* Comparison Section */
.comparison h2 {
    text-align: center;
    margin-bottom: 30px;
}

.comparison-tabs {
    max-width: 800px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.tab-button {
    background-color: transparent;
    border: none;
    padding: 10px 20px;
    margin: 0 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--gray-color);
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.tab-button.active, .tab-button:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.tab-content.active {
    display: block;
}

.tab-content h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.tab-content ul li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 25px;
}

.tab-content ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Products Section */
.products h2 {
    text-align: center;
    margin-bottom: 30px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.product-card .placeholder-image {
    height: 200px;
    border-radius: 8px 8px 0 0;
}

.product-card h3 {
    padding: 20px 20px 10px;
    font-size: 1.2rem;
}

.product-card p {
    padding: 0 20px;
    color: var(--gray-color);
    flex-grow: 1;
}

.product-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 10px 20px;
    margin: 20px;
    border-radius: 5px;
    font-weight: 500;
    text-align: center;
    transition: var(--transition);
}

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

/* Specs Section */
.specs h2 {
    text-align: center;
    margin-bottom: 30px;
}

.table-responsive {
    overflow-x: auto;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.specs-table th, .specs-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--light-gray-color);
}

.specs-table th {
    background-color: var(--primary-color);
    color: #fff;
}

.specs-table tr:nth-child(even) {
    background-color: var(--light-color);
}

.specs-table tr:hover {
    background-color: rgba(0, 153, 204, 0.1);
}

/* Installation Section */
.installation h2 {
    text-align: center;
    margin-bottom: 30px;
}

.installation-steps {
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    margin-bottom: 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.step-number {
    background-color: var(--primary-color);
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 60px;
    flex-shrink: 0;
}

.step-content {
    padding: 20px;
}

.step-content h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.step-content p {
    margin-bottom: 0;
    color: var(--gray-color);
}

/* FAQ Section */
.faq h2 {
    text-align: center;
    margin-bottom: 30px;
}

.accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.accordion-header {
    background-color: #fff;
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion-header h3 {
    margin-bottom: 0;
    font-size: 1.1rem;
    flex-grow: 1;
}

.accordion-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.accordion-content {
    background-color: #fff;
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-item.active .accordion-content {
    padding: 0 20px 20px;
    max-height: 1000px;
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

/* Contact Section */
.contact h2 {
    text-align: center;
    margin-bottom: 30px;
}

.contact-wrapper {
    display: flex;
    gap: 40px;
}

.contact-info, .contact-form {
    flex: 1;
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.contact-info h3, .contact-form h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.contact-info ul {
    margin-bottom: 20px;
}

.contact-info ul li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.contact-info ul li i {
    color: var(--primary-color);
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--light-gray-color);
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 1rem;
}

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

.submit-button {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-button:hover {
    background-color: var(--secondary-color);
}

/* Footer */
footer {
    background-color: var(--dark-color);
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo, .footer-links, .footer-contact {
    flex: 1;
    min-width: 200px;
}

.footer-logo h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.footer-logo p {
    color: #adb5bd;
}

.footer-links h4, .footer-contact h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

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

.footer-links ul li a {
    color: #adb5bd;
}

.footer-links ul li a:hover {
    color: var(--primary-color);
}

.footer-contact ul li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.footer-contact ul li i {
    color: var(--primary-color);
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.footer-contact ul li a {
    color: #adb5bd;
}

.footer-contact ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #495057;
}

.footer-bottom p {
    color: #adb5bd;
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 992px) {
    header .container {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 20px;
    }
    
    .about .content-wrapper {
        flex-direction: column;
    }
    
    .contact-wrapper {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 10px;
    }
    
    .benefits-grid, .applications-grid, .products-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero h2 {
        font-size: 1.2rem;
    }
    
    .step {
        flex-direction: column;
    }
    
    .step-number {
        width: 100%;
        padding: 10px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
}