* {
    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;
}

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

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #1a1a2e;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    transition: color 0.3s;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: #f59e0b;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    transition: 0.3s;
}

/* Nav CTA Button */
.btn-nav {
    background: #f59e0b;
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 4px;
    font-weight: 600;
    transition: background 0.3s;
}

.btn-nav:hover {
    background: #d97706;
    color: #fff !important;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 100px 20px 80px;
}

.hero-content {
    max-width: 700px;
}

.hero-content h1 {
    font-size: 2.8rem;
    margin-bottom: 28px;
    font-weight: 700;
    line-height: 1.2;
}

.hero-features {
    list-style: none;
    margin-bottom: 36px;
    font-size: 1.1rem;
}

.hero-features li {
    padding: 6px 0;
    padding-left: 28px;
    position: relative;
    opacity: 0.9;
}

.hero-features li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: #f59e0b;
    font-weight: 700;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 36px;
    background: #f59e0b;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.btn:hover {
    background: #d97706;
    transform: translateY(-2px);
}

.btn-hero {
    padding: 16px 44px;
    font-size: 1.1rem;
}

/* ===== Section Common ===== */
.section-subtitle {
    text-align: center;
    color: #666;
    font-size: 1.05rem;
    margin-top: -30px;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Products ===== */
.products {
    padding: 100px 0;
    background: #f8f9fa;
}

.products h2,
.solutions h2,
.advantages h2,
.about h2,
.contact h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: #1a1a2e;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.product-img {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: #eee;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.product-card:hover .product-img img {
    transform: scale(1.05);
}

.product-card h3 {
    padding: 16px;
    font-size: 1rem;
    color: #1a1a2e;
    text-align: center;
    font-weight: 600;
}

/* ===== Solutions ===== */
.solutions {
    padding: 100px 0;
    background: #fff;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.solution-card {
    background: #f8f9fa;
    padding: 36px 24px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
}

.solution-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.solution-card h3 {
    font-size: 1.05rem;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.solution-card p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ===== Advantages ===== */
.advantages {
    padding: 100px 0;
    background: #1a1a2e;
    color: #fff;
}

.advantages h2 {
    color: #fff;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.advantage-card {
    text-align: center;
    padding: 40px 24px;
}

.advantage-icon {
    font-size: 2.8rem;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: #f59e0b;
}

.advantage-card p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== About ===== */
.about {
    padding: 100px 0;
    background: #f8f9fa;
}

.about-text p {
    font-size: 1.05rem;
    color: #555;
    margin-bottom: 16px;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.4rem;
    font-weight: 700;
    color: #f59e0b;
}

.stat-label {
    color: #777;
    font-size: 0.9rem;
}

/* ===== Contact ===== */
.contact {
    padding: 100px 0;
    background: #fff;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-item {
    margin-bottom: 20px;
}

.contact-item strong {
    display: block;
    color: #1a1a2e;
    margin-bottom: 4px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-item p {
    color: #555;
    font-size: 1rem;
}

.contact-moq {
    margin-top: 28px;
    padding: 16px;
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    border-radius: 4px;
    font-size: 0.95rem;
    color: #92400e;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 14px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #f59e0b;
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

/* ===== Footer ===== */
.footer {
    background: #1a1a2e;
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.footer-col ul a:hover {
    color: #f59e0b;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    transition: background 0.3s, color 0.3s;
}

.social-link:hover {
    background: #f59e0b;
    color: #fff;
}

.footer-bottom {
    text-align: center;
    font-size: 0.85rem;
}

.footer-tagline {
    margin-top: 4px;
    opacity: 0.5;
    font-size: 0.8rem;
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #1a1a2e;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .nav-links.active {
        display: flex;
    }

    .btn-nav {
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

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

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .solutions-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }

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

    .hero-content h1 {
        font-size: 1.6rem;
    }

    .stats {
        flex-direction: column;
        gap: 20px;
    }
}