/* 全局样式重置 */
* {
    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;
    overflow-x: hidden;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.nav-logo h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

.nav-link:hover {
    color: #3498db;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #3498db;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(rgba(102, 126, 234, 0.7), rgba(118, 75, 162, 0.7)), url('images/main/back.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: white;
    padding: 120px 0 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    position: relative;
}

.hero-content {
    text-align: center;
    position: absolute;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.cta-arrow {
    cursor: pointer;
    transition: all 0.3s ease;
    animation: bounce 2s infinite;
    opacity: 0.8;
}

.cta-arrow:hover {
    transform: translateY(-5px);
    opacity: 1;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background: #e74c3c;
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.cta-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* 通用section样式 */
.section {
    padding: 80px 0;
}

.bg-light {
    background-color: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #2c3e50;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #e74c3c);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

/* 企业介绍样式 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: #555;
}

.about-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.about-images img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.about-images img:hover {
    transform: translateY(-5px);
}

/* 发展历程样式 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #3498db, #e74c3c);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    background: #3498db;
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 700;
    font-size: 1.2rem;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    width: 45%;
    margin: 0 2.5%;
}

.timeline-content img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.timeline-content h3 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

/* 企业荣誉样式 */
.honors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.honor-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

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

.honor-item h3 {
    padding: 1rem;
    color: #2c3e50;
    font-size: 1.3rem;
}

.honor-item p {
    padding: 0 1rem 1.5rem;
    color: #666;
}

/* 产品介绍样式 */
.products-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.product-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.product-item img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.product-item h4 {
    padding: 1rem;
    color: #2c3e50;
}

.product-item p {
    padding: 0 1rem 1.5rem;
    color: #666;
    font-size: 0.9rem;
}

.features-list {
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
}

.feature-item img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
    margin-right: 1.5rem;
}

.feature-text h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.feature-text p {
    color: #666;
    font-size: 0.9rem;
}

/* 页脚样式 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #3498db;
}

.footer-section p,
.footer-section li {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

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

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

.footer-section a:hover {
    color: #3498db;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    background: #3498db;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    transition: background 0.3s ease;
}

.social-link:hover {
    background: #2980b9;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    opacity: 0.7;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-logo {
        gap: 8px;
    }
    
    .logo-img {
        height: 30px;
    }
    
    .nav-logo h2 {
        font-size: 1.4rem;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 80px 15px 50px;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .section {
        padding: 60px 15px;
    }
    
    .section-title {
        font-size: 2.2rem;
        margin-bottom: 2rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-images {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column !important;
        align-items: flex-start;
        padding-left: 50px;
    }
    
    .timeline-year {
        left: 20px;
        transform: translateX(-50%);
    }
    
    .timeline-content {
        width: 100%;
        margin: 0;
        margin-top: 2rem;
    }
    
    .honors-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .product-items {
        grid-template-columns: 1fr;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-item img {
        margin-right: 0;
        margin-bottom: 1rem;
    }
}

@media (max-width: 480px) {
    .nav-logo {
        gap: 5px;
    }
    
    .logo-img {
        height: 25px;
    }
    
    .nav-logo h2 {
        font-size: 1.2rem;
    }
    
    .hero {
        padding: 60px 10px 40px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
        margin-bottom: 0.8rem;
    }
    
    .section {
        padding: 40px 10px;
    }
    
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }
    
    #about img, #history img, #honors img, #products img {
        max-width: 100%;
        margin: 10px auto;
        padding: 0 15px;
        box-sizing: border-box;
    }
}
    
    .container {
        padding: 0 15px;
    }

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

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

.section {
    animation: fadeInUp 0.6s ease-out;
}

/* 图片懒加载效果 */
.lazy-load {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    min-height: 200px;
    display: block;
}

.lazy-load.loaded {
    opacity: 1;
    background: none;
    animation: none;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 图片加载效果 */
img {
    transition: opacity 0.3s ease;
}

img:not([src]) {
    opacity: 0;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #3498db;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2980b9;
}

/* 简化的图片样式 - 一排一个图片，放大显示 */
#about img, #history img, #honors img, #products img {
    width: 100%;
    max-width: 800px;
    height: auto;
    margin: 20px auto;
    display: block;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

#about img:hover, #history img:hover, #honors img:hover, #products img:hover {
    transform: scale(1.02);
}

/* 响应式设计 */
@media (max-width: 768px) {
    #about img, #history img, #honors img, #products img {
        max-width: 100%;
        margin: 15px auto;
        padding: 0 20px;
        box-sizing: border-box;
    }
}

@media (max-width: 480px) {
    #about img, #history img, #honors img, #products img {
        max-width: 100%;
        margin: 10px auto;
    }
}