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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Header Styles */
header {
    background-color: #2c3e50;
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.logo {
    height: 60px;
    float: left;
}

.logo img {
    height: 100%;
    border-radius: 12px;
}

nav {
    float: right;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    transition: color 0.3s;
    padding: 10px 0;
}

nav ul li a:hover, nav ul li a.active {
    color: #f39c12;
    border-bottom: 2px solid #f39c12;
}

/* Clear floats */
.header-content::after {
    content: "";
    display: table;
    clear: both;
}

/* Main Content Area */
main {
    margin-top: 90px;
}

/* Banner Styles */
.banner {
    height: auto;
    text-align: center;
    color: white;
    position: relative;
    padding: 0;
    margin: 0;
}

.banner-image {
    width: 100%;
    height: 800px;
    background: url('pro.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
}

.banner-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.6);
    padding: 30px 0;
}

.banner-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: white;
}

.banner-content p {
    font-size: 24px;
    margin-bottom: 30px;
    color: white;
}

/* Buttons */
.btn {
    display: inline-block;
    background-color: #f39c12;
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
    text-shadow: none;
}

.btn:hover {
    background-color: #e67e22;
}

.btn-secondary {
    background-color: #7f8c8d;
}

.btn-secondary:hover {
    background-color: #95a5a6;
}

/* About Section (Below Banner) */
.about-below-banner {
    padding: 80px 0;
    background-color: #fff;
}

.about-below-banner .container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-below-banner .about-image {
    flex: 1;
}

.about-below-banner .about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.about-below-banner .about-content {
    flex: 1;
}

.about-below-banner .about-content h2 {
    font-size: 36px;
    color: #2c3e50;
    margin-bottom: 20px;
}

.about-below-banner .about-content p {
    font-size: 18px;
    line-height: 1.8;
    color: #333;
    margin-bottom: 20px;
}

.about-below-banner .btn {
    margin-top: 20px;
}

/* Featured Products Section */
.featured-products {
    padding: 80px 0;
    background-color: #ecf0f1;
}

.featured-products h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
    color: #2c3e50;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 50px 30px;
}

.product-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-image {
    height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s;
    padding: 20px;
}

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

.product-info {
    padding: 20px;
    text-align: center;
}

.product-info h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.price {
    font-size: 24px;
    color: #f39c12;
    font-weight: bold;
}

/* Advantages Section */
.advantages {
    padding: 80px 0;
}

.advantages h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
    color: #2c3e50;
}

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

.advantage-item {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.advantage-item:hover {
    transform: translateY(-10px);
}

.advantage-item h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

/* Products Page */
.products-page {
    padding: 50px 0;
}

.products-page h1 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
    color: #2c3e50;
}

/* Product Detail Page */
.product-detail {
    padding: 50px 0;
}

.breadcrumb {
    margin-bottom: 30px;
}

.breadcrumb a {
    color: #3498db;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.product-images .main-image {
    height: 500px;
    overflow: hidden;
    border-radius: 10px;
    margin-bottom: 20px;
}

.product-images .main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumbnail-images {
    display: flex;
    gap: 15px;
}

.thumbnail-images img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 5px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}

.thumbnail-images img:hover {
    border-color: #f39c12;
}

.product-info-detail h1 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.product-info-detail .price {
    font-size: 32px;
    margin-bottom: 30px;
}

.product-description {
    margin-bottom: 30px;
}

.product-description h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.product-actions {
    display: flex;
    gap: 20px;
}

/* About Page */
.about-page {
    padding: 50px 0;
}

.about-page h1 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
    color: #2c3e50;
}

.about-content {
    line-height: 1.8;
}

.about-section {
    margin-bottom: 50px;
}

.about-section h2 {
    margin-bottom: 20px;
    color: #2c3e50;
    padding-bottom: 10px;
    border-bottom: 2px solid #f39c12;
}

.timeline {
    list-style: none;
    position: relative;
    padding-left: 30px;
}

.timeline:before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #f39c12;
}

.timeline li {
    margin-bottom: 30px;
    position: relative;
}

.timeline li:before {
    content: '';
    position: absolute;
    left: -38px;
    top: 5px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #f39c12;
    border: 2px solid #fff;
    box-shadow: 0 0 0 2px #f39c12;
}

.timeline li h3 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.values-list {
    list-style: none;
}

.values-list li {
    margin-bottom: 15px;
    padding-left: 20px;
    position: relative;
}

.values-list li:before {
    content: '✓';
    color: #f39c12;
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* Contact Page */
.contact-page {
    padding: 50px 0;
}

.contact-page h1 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 36px;
    color: #2c3e50;
}

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

.contact-item {
    margin-bottom: 30px;
}

.contact-item h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.map-placeholder {
    background: #ddd;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

.contact-form h2, .contact-info h2 {
    margin-bottom: 30px;
    color: #2c3e50;
    padding-bottom: 10px;
    border-bottom: 2px solid #f39c12;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 16px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #f39c12;
}

/* Footer */
footer {
    background-color: #1a252f;
    color: white;
    text-align: center;
    padding: 30px 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo {
        float: none;
        text-align: center;
        margin: 0 auto;
    }
    
    nav {
        float: none;
        margin-top: 20px;
    }
    
    nav ul {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    nav ul li {
        margin: 5px 10px;
    }
    
    .banner {
        height: 300px;
    }
    
    .banner h1 {
        font-size: 32px;
    }
    
    .banner p {
        font-size: 18px;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .product-image {
        height: 300px;
    }
    
    .product-detail-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .thumbnail-images {
        flex-wrap: wrap;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}