body {
    font-family: 'Helvetica', sans-serif;
    margin: 0;
    padding: 0;
    background: #f0f6ff;
    color: #1a1a1a;
    line-height: 1.9;
}

.page-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-header {
    background: #0052cc;
    color: #fff;
    padding: 30px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.site-title {
    font-size: 2.2rem;
    margin: 0;
}

.main-nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    gap: 35px;
}

.nav-link {
    color: #fff;
    text-decoration: none;
    font-size: 1.3rem;
}

.nav-link:hover {
    text-decoration: underline;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
}

.content {
    padding: 50px 0;
}

.welcome-section, .features-section, .blog-highlights, .about-section, .feedback-section, .promo-section, .blog-content, .tips-content, .products-content, .cart-content, .cart-tips {
    margin-bottom: 70px;
}

h1, h2, h3 {
    color: #0052cc;
}

.features-list, .feedback-list, .tips-list {
    list-style: none;
    padding: 0;
}

.features-list li, .feedback-list li, .tips-list li {
    padding: 15px 0;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.blog-item {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.blog-link {
    color: #0052cc;
    text-decoration: none;
}

.blog-link:hover {
    text-decoration: underline;
}

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

.product-card {
    background: #fff;
    padding: 35px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    text-align: center;
}

.add-to-cart {
    background: #00b33c;
    color: #fff;
    border: none;
    padding: 15px 30px;
    cursor: pointer;
    border-radius: 10px;
}

.add-to-cart:hover {
    background: #009933;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background: #e6ecf2;
    margin: 15px 0;
    border-radius: 10px;
}

#lead-form input, #lead-form textarea {
    width: 100%;
    margin: 15px 0;
    padding: 15px;
    border: 1px solid #b3c6ff;
    border-radius: 10px;
}

#lead-form button {
    background: #0052cc;
    color: #fff;
    border: none;
    padding: 15px 30px;
    cursor: pointer;
    border-radius: 10px;
}

#lead-form button:hover {
    background: #003d99;
}

.main-footer {
    background: #1a1a1a;
    color: #fff;
    text-align: center;
    padding: 35px 0;
}

.primary-btn {
    background: #00b33c;
    color: #fff;
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 10px;
    display: inline-block;
}

.primary-btn:hover {
    background: #009933;
}

@media (max-width: 768px) {
    .main-nav ul {
        display: none;
        flex-direction: column;
        gap: 20px;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav.active ul {
        display: flex;
    }
}