* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, sans-serif;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 999;
    padding: 15px 0;
}
.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 22px;
    font-weight: 700;
    color: #111;
    text-decoration: none;
}
.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}
.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
}
.nav-menu a.active {
    color: #2563eb;
}
.cta-btn {
    background: #2563eb;
    color: #fff !important;
    padding: 10px 20px;
    border-radius: 6px;
}
.hamburger {
    display: none;
    font-size: 24px;
    cursor: pointer;
}
.hero {
    padding: 80px 0;
}
.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
.hero h1 {
    font-size: 42px;
    margin-bottom: 20px;
    line-height: 1.2;
}
.hero p {
    font-size: 18px;
    color: #555;
    margin-bottom: 30px;
    line-height: 1.6;
}
.primary-btn {
    background: #2563eb;
    color: #fff;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 16px;
}
.secondary-btn {
    background: #f3f4f6;
    color: #111;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
    margin-left: 15px;
}
.hero-img img {
    width: 100%;
    border-radius: 12px;
}
.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
}
.features {
    padding: 70px 0;
    background: #f9fafb;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}
.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}
.feature-card h3 {
    margin-bottom: 15px;
}
.preview-product {
    padding: 70px 0;
}
.preview-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
.preview-img {
    width: 100%;
    border-radius: 12px;
}
.preview-content h2 {
    margin-bottom: 20px;
}
.preview-content p {
    margin-bottom: 20px;
    color: #555;
    line-height: 1.6;
}
.preview-content ul {
    margin-bottom: 30px;
    list-style: none;
    gap: 12px;
    display: flex;
    flex-direction: column;
}
.page-header {
    background: #2563eb;
    color: #fff;
    padding: 50px 0;
}
.page-header h1 {
    font-size: 36px;
}
.product-detail {
    padding: 70px 0;
}
.product-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}
.main-pro-img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 20px;
}
.spec-table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
}
.spec-table tr td {
    border-bottom: 1px solid #eee;
    padding: 15px 0;
}
.about-content {
    padding: 70px 0;
}
.about-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-img {
    width: 100%;
    border-radius: 10px;
}
.contact-section {
    padding: 70px 0;
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}
.contact-list {
    list-style: none;
    margin: 30px 0;
    line-height: 2.5;
    font-size: 18px;
}
.whatsapp-btn {
    background: #25D366;
    color: #fff;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    display: inline-block;
}
.contact-form label {
    display: block;
    margin-bottom: 8px;
    margin-top: 20px;
}
.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
}
footer {
    background: #111;
    color: #fff;
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
}
@media(max-width:768px){
    .nav-menu {
        position: absolute;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: #fff;
        width: 100%;
        padding: 30px 0;
        transition: 0.3s;
    }
    .nav-menu.show {
        left: 0;
    }
    .hamburger {
        display: block;
    }
    .hero .container, .preview-wrap, .product-grid, .about-wrap, .contact-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 {
        font-size: 28px;
    }
}