/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 2rem;
    color: #0056b3;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #0056b3;
    color: #fff;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #004494;
}

/* Header & Navigation */
header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #0056b3;
}

nav ul {
    display: flex;
    gap: 20px;
}

nav ul li a {
    font-weight: 500;
}

nav ul li a:hover, nav ul li a.active {
    color: #0056b3;
}

.mobile-toggle {
    display: none;
    cursor: pointer;
    width: 30px;
    height: 30px;
}

/* Banner Section */
.banner {
    background-size: cover;
    background-position: center;
    height: 500px;
    display: flex;
    align-items: center;
    color: #fff;
    text-align: center;
    position: relative;
}

.banner::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.banner p {
    font-size: 1.25rem;
    margin-bottom: 30px;
}

/* Intro Section */
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.intro-text p {
    margin-bottom: 20px;
}

.intro-image img {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.bg-light {
    background-color: #f0f4f8;
}

/* Products Section */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-item {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.product-item:hover {
    transform: translateY(-5px);
}

.product-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    margin-bottom: 10px;
}

/* Solutions Section */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.solution-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

.solution-card .icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    color: #0056b3;
}

.solution-card h3 {
    margin-bottom: 15px;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-text h2 {
    margin-bottom: 20px;
    color: #0056b3;
}

.about-text h3 {
    margin-top: 30px;
    margin-bottom: 10px;
}

.about-image img {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.info-item .icon {
    width: 40px;
    height: 40px;
    color: #0056b3;
    flex-shrink: 0;
}

.info-item h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.contact-map img {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Footer Section */
footer {
    background-color: #333;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

.footer-info p {
    margin-bottom: 10px;
}

.footer-info a:hover {
    text-decoration: underline;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .banner h1 {
        font-size: 2.5rem;
    }
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header-container {
        position: relative;
    }

    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        padding: 20px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }

    nav.show {
        display: block;
    }

    nav ul {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .mobile-toggle {
        display: block;
    }

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

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

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

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

    .banner {
        height: 400px;
    }

    .banner h1 {
        font-size: 2rem;
    }
}