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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Header Styles */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.logo img {
    height: 40px;
    width: auto;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #007bff;
}

.header-actions {
    display: flex;
    gap: 15px;
}

/* Button Styles */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0056b3, #004085);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn-outline:hover {
    background: #007bff;
    color: white;
}

.btn-large {
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 600;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 120px 0 80px;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-image {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-banner {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.hero-banner:hover {
    transform: scale(1.05);
}

/* Section Styles */
section {
    padding: 30px 0;
}

section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 10px;
    color: #1a1a1a;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 50px;
}

.section-description {
    text-align: center;
    font-size: 1rem;
    color: #888;
    margin-bottom: 50px;
}

/* Advantages Section */
.advantages {
    background: #fff;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.advantage-card {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.advantage-icon {
    margin-bottom: 20px;
}

.advantage-icon img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.advantage-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1a1a1a;
}

.advantage-card p {
    color: #666;
    line-height: 1.6;
}

/* Products Section */
.products {
    /* 背景图片和遮罩效果通过内联样式实现 */
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 50px;
}

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.product-image {
    height: 150px;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
    flex-shrink: 0;
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.product-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: #1a1a1a;
    line-height: 1.3;
}

.product-content p {
    color: #666;
    line-height: 1.5;
    font-size: 0.9rem;
    flex-grow: 1;
}

/* Why Choose Us Section */
.why-choose-us {
    background: #fff;
}

.why-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-top: 50px;
}

.why-text h2 {
    text-align: left;
    margin-bottom: 30px;
}

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

.why-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    gap: 15px;
}

.why-list i {
    color: #007bff;
    font-size: 1.2rem;
    margin-top: 3px;
    flex-shrink: 0;
}

.why-list span {
    color: #666;
    line-height: 1.6;
}

.why-image img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Business Solutions Section */
.business-solutions {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 50px;
}

.solution-card {
    background: #fff;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.solution-icon {
    margin-bottom: 20px;
}

.solution-icon img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.solution-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1a1a1a;
}

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

.cta-section {
    margin-top: 40px;
    background: url('../images/底部框.png') center/cover no-repeat;
    border-radius: 0px;
    padding: 40px;
    position: relative;
    margin-left: -20px;
    margin-right: -20px;
    width: calc(100% + 40px);
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
     border-radius: 0px;
    z-index: 1;
}

.cta-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.cta-text {
    flex: 1;
    text-align: center;
    max-width: 600px;
}

.cta-text h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 15px;
    line-height: 1.3;
}

.cta-text p {
    font-size: 1.1rem;
    color: #666;
    line-height: 1.6;
    margin: 0;
}

.cta-button {
    flex-shrink: 0;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: 40px;
    margin-bottom: 40px;
    align-items: start;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #007bff;
}

.footer-section p {
    color: #ccc;
    margin-bottom: 10px;
}

.footer-section.qr-section {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
}

.qr-code {
    width: 140px;
    height: 140px;
    border-radius: 8px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.qr-code:hover {
    transform: scale(1.1);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #999;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav ul {
        gap: 20px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .why-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .why-text h2 {
        text-align: center;
    }
    
    section {
        padding: 60px 0;
    }
    
    section h2 {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-section.qr-section {
        justify-content: center;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .product-image {
        height: 120px;
    }
    
    .product-content {
        padding: 15px;
    }
    
    .product-content h3 {
        font-size: 1rem;
    }
    
    .product-content p {
        font-size: 0.85rem;
    }
    
    .cta-section {
        margin-left: -15px;
        margin-right: -15px;
        width: calc(100% + 30px);
    }
    
    .cta-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    
    .cta-text {
        text-align: center;
        max-width: 100%;
    }
    
    .cta-text h2 {
        font-size: 1.8rem;
    }
    
    .cta-text p {
        font-size: 1rem;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-text p {
        font-size: 1rem;
    }
    
    .btn-large {
        padding: 12px 25px;
        font-size: 14px;
    }
    
    .advantages-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .product-image {
        height: 100px;
    }
    
    .product-content {
        padding: 12px;
    }
    
    .product-content h3 {
        font-size: 0.95rem;
    }
    
    .product-content p {
        font-size: 0.8rem;
    }
    
    .cta-section {
        padding: 30px 20px;
        margin-left: -15px;
        margin-right: -15px;
        width: calc(100% + 30px);
    }
    
    .cta-text h2 {
        font-size: 1.5rem;
    }
    
    .cta-text p {
        font-size: 0.9rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.advantage-card,
.product-card,
.solution-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}