/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
}

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

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

.logo img {
    height: 60px;
}

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

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

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 700;
    transition: color 0.3s;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 0;
}

nav ul li a i {
    font-size: 16px;
    width: 20px;
    text-align: center;
}

nav ul li a:hover {
    color: #e6b121;
}

/* 二级菜单样式 */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #fff;
    min-width: 250px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    z-index: 1001;
    top: 100%;
    left: 0;
    border-radius: 4px;
    overflow: hidden;
}

.dropdown-content li {
    margin: 0;
    border-bottom: 1px solid #f0f0f0;
}

.dropdown-content li:last-child {
    border-bottom: none;
}

.dropdown-content li a {
    padding: 12px 16px;
    font-weight: 500;
    font-size: 14px;
    color: #333;
    transition: all 0.3s ease;
}

.dropdown-content li a:hover {
    background-color: #f9f9f9;
    color: #e6b121;
    padding-left: 20px;
}

.dropdown:hover .dropdown-content {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* 二级下拉菜单 */
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu:hover .dropdown-submenu-content {
    display: block;
    animation: fadeIn 0.3s ease;
}

.dropdown-submenu-content {
    display: none;
    position: absolute;
    left: 100%;
    top: 0;
    background-color: #fff;
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    z-index: 1002;
    border-radius: 4px;
    overflow: hidden;
}

.dropdown-submenu-content li {
    margin: 0;
    border-bottom: 1px solid #f0f0f0;
}

.dropdown-submenu-content li:last-child {
    border-bottom: none;
}

.dropdown-submenu-content li a {
    padding: 10px 16px;
    font-size: 13px;
}

.dropdown-submenu-content li a:hover {
    padding-left: 18px;
}

.language-selector select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

/* 横幅区域 - 多屏切换 */
.banner {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #e6b121, #ffd166);
    color: white;
    text-align: center;
    padding: 120px 0;
    background-size: cover;
    background-position: center;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
    opacity: 0.5;
    z-index: 1;
}

.banner-slider {
    position: relative;
    z-index: 2;
}

.banner-slide {
    display: none;
    animation: fadeIn 1s ease-in-out;
}

.banner-slide.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.banner .container {
    position: relative;
    z-index: 2;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 10px;
    font-weight: 700;
}

.banner h2 {
    font-size: 36px;
    margin-bottom: 20px;
    font-weight: 600;
}

.banner p {
    font-size: 20px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.banner button {
    background-color: white;
    color: #e6b121;
    padding: 15px 40px;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.banner button:hover {
    background-color: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

/* 切换指示器 */
.banner-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background-color: white;
    width: 30px;
    border-radius: 6px;
}

/* 核心业务方案 */
.business-scheme.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.scheme-item {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.scheme-item:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.2);
}

.scheme-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: white;
    font-weight: 600;
}

.scheme-item p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    margin-bottom: 0;
}

/* 核心业务 */
.core-business {
    padding: 60px 0;
    background-color: #f9f9f9;
}

.core-business h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

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

.business-item {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    text-align: left;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.business-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.business-icon {
    margin-bottom: 20px;
    text-align: center;
}

.business-icon img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 50%;
}

.business-item h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
    font-weight: 700;
    text-align: center;
}

.business-item p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

/* 细分业务单元 */
.business-subunits {
    margin-top: 20px;
}

.subunit {
    background-color: #f9f9f9;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.subunit:hover {
    background-color: #f0f0f0;
    transform: translateX(5px);
}

.subunit h5 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #333;
    font-weight: 600;
}

.subunit p {
    font-size: 14px;
    margin-bottom: 10px;
    color: #666;
    line-height: 1.5;
}

.detail-link {
    display: inline-block;
    color: #e6b121;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.detail-link:hover {
    color: #d3a01a;
    text-decoration: underline;
}

/* 技术优势 */
.tech-advantage {
    padding: 60px 0;
    background-color: white;
}

.tech-advantage h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

.tech-advantage .solution-section {
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 8px;
    border-left: 4px solid #e6b121;
    transition: all 0.3s ease;
}

.tech-advantage .solution-section:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.tech-advantage-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tech-advantage-item {
    padding: 10px 0;
    border-bottom: 1px solid #e0e0e0;
}

.tech-advantage-item:last-child {
    border-bottom: none;
}

.tech-advantage-item h4 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #e6b121;
    font-weight: 700;
}

.tech-advantage-item p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 关于我们 */
.about {
    padding: 60px 0;
    background-color: #f9f9f9;
}

.about h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: center;
}

.about-section {
    margin-bottom: 60px;
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.about-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #333;
    font-weight: 700;
    border-bottom: 2px solid #e6b121;
    padding-bottom: 10px;
}

.solution-section {
    margin-bottom: 40px;
    padding: 25px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-left: 4px solid #e6b121;
}

.solution-section h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
    font-weight: 600;
}

.solution-content {
    color: #666;
    line-height: 1.6;
}

.solution-content p {
    margin-bottom: 10px;
}

.solution-content ul {
    margin-left: 20px;
    margin: 15px 0;
}

.solution-content ul li {
    margin-bottom: 8px;
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #666;
    font-size: 16px;
}

.about-image {
    flex: 1;
    min-width: 300px;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* 产品中心 */
.products {
    padding: 60px 0;
    background-color: white;
}

.products h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

.products-content {
    display: flex;
    gap: 40px;
}

/* 左侧导航 */
.products-sidebar {
    flex: 0 0 250px;
    border-right: 1px solid #f0f0f0;
}

.products-nav {
    list-style: none;
}

.products-nav li {
    margin-bottom: 5px;
}

.products-nav li a {
    display: block;
    padding: 12px 16px;
    text-decoration: none;
    color: #333;
    font-size: 16px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.products-nav li a:hover {
    color: #e6b121;
    background-color: #f9f9f9;
    border-left-color: #e6b121;
    padding-left: 20px;
}

.products-nav li a.active {
    color: #e6b121;
    background-color: #f9f9f9;
    border-left-color: #e6b121;
    font-weight: 600;
}

.nav-category {
    font-weight: 700;
    color: #e6b121;
    padding: 12px 16px;
    margin-top: 10px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 900;
}

/* 右侧产品详情 */
.products-main {
    flex: 1;
}

.product-detail {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.product-image {
    flex: 0 0 400px;
}

.product-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.product-info {
    flex: 1;
}

.product-info h4 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
    font-weight: 700;
}

.product-info p {
    margin-bottom: 30px;
    color: #666;
    line-height: 1.6;
    font-size: 16px;
}

.product-info h5 {
    font-size: 18px;
    margin: 20px 0 10px;
    color: #333;
    font-weight: 600;
}

.product-info ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.product-info ul li {
    color: #666;
    line-height: 1.5;
    margin-bottom: 5px;
}

/* 产品资料下载 */
.product-downloads {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.product-downloads h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.download-item {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.download-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.download-item h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #333;
    font-weight: 600;
    border-bottom: 2px solid #e6b121;
    padding-bottom: 10px;
}

.download-item ul {
    list-style: none;
}

.download-item ul li {
    margin-bottom: 15px;
    position: relative;
    padding-left: 20px;
}

.download-item ul li:before {
    content: "📄";
    position: absolute;
    left: 0;
    top: 0;
}

.download-item ul li a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
}

.download-item ul li a:hover {
    color: #e6b121;
    text-decoration: underline;
}

/* 解决方案 */
.solutions {
    padding: 60px 0;
    background-color: #f9f9f9;
}

.solutions h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

.solution-section {
    margin-bottom: 40px;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.solution-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 2px solid #e6b121;
    padding-bottom: 10px;
}

.solution-header h4 {
    font-size: 20px;
    color: #333;
    font-weight: 700;
    margin: 0;
}

.solution-detail-link {
    color: #e6b121;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: color 0.3s ease;
}

.solution-detail-link:hover {
    color: #d3a01a;
    text-decoration: underline;
}

.solution-content {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.solution-text {
    flex: 1;
}

.solution-text p {
    margin-bottom: 7.5px;
    line-height: 1.6;
    color: #666;
}

.solution-text ul {
    margin-bottom: 10px;
}

.solution-text ul li {
    margin-bottom: 5px;
    line-height: 1.5;
    color: #666;
    list-style: disc;
    margin-left: 20px;
}

.solution-image {
    flex: 0 0 300px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.solution-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* 响应式设计 - 解决方案 */
@media (max-width: 768px) {
    .solution-content {
        flex-direction: column;
    }
    
    .solution-image {
        flex: 1;
    }
}

/* 证书网格 */
.certificate-grid {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.certificate-item {
    text-align: center;
    border: 1px solid #f0f0f0;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    flex: 1;
    min-width: 250px;
}

.certificate-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.certificate-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 15px;
}

.certificate-item p {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 0;
}

/* 响应式设计 - 证书网格 */
@media (max-width: 768px) {
    .certificate-grid {
        grid-template-columns: 1fr;
    }
}

/* 新闻中心 */
.news {
    padding: 60px 0;
    background-color: white;
}

.news h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

.news-section {
    margin-bottom: 60px;
    padding: 30px;
    background-color: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.news-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 2px solid #e6b121;
    padding-bottom: 10px;
}

.news-section-header h4 {
    font-size: 20px;
    color: #333;
    font-weight: 700;
    margin: 0;
}

.news-more-link {
    color: #e6b121;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: color 0.3s ease;
}

.news-more-link:hover {
    color: #d3a01a;
    text-decoration: underline;
}

.news-date {
    font-size: 12px;
    color: #999;
    margin-bottom: 8px;
    font-weight: 500;
}

.more-news-item {
    padding: 20px;
    border-bottom: 1px solid #f0f0f0;
}

.more-news-item:last-child {
    border-bottom: none;
}

.more-news-item h4 {
    font-size: 16px;
    margin-bottom: 10px;
    color: #333;
    font-weight: 600;
}

.more-news-item p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.more-news-item .news-detail-link {
    display: inline-block;
    color: #e6b121;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.more-news-item .news-detail-link:hover {
    color: #d3a01a;
    text-decoration: underline;
}

.download-list {
    list-style: none;
    margin-bottom: 20px;
}

.download-list li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.download-list li:before {
    content: "📄";
    position: absolute;
    left: 0;
    top: 0;
}

.download-list li a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s ease;
}

.download-list li a:hover {
    color: #e6b121;
    text-decoration: underline;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-item {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.news-icon {
    flex: 0 0 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.news-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-item-content {
    flex: 1;
}

.news-item h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
    font-weight: 600;
    border-bottom: none;
    padding-bottom: 0;
}

.news-item p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 10px;
}

.news-detail-link {
    display: inline-block;
    color: #e6b121;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: color 0.3s ease;
}

.news-detail-link:hover {
    color: #d3a01a;
    text-decoration: underline;
}

.news-link {
    cursor: pointer;
    transition: all 0.3s ease;
}

.news-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

/* 联系我们 */
.contact {
    padding: 60px 0;
    background-color: #f9f9f9;
}

.contact h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 60px;
    color: #333;
    font-weight: 600;
}

.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.contact-info {
    flex: 1;
    min-width: 300px;
}

.contact-info p {
    margin-bottom: 15px;
    font-size: 16px;
    color: #666;
    line-height: 1.6;
}

.contact-info p strong {
    color: #333;
}

.contact-form {
    flex: 1;
    min-width: 300px;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #e6b121;
    box-shadow: 0 0 0 2px rgba(230,177,33,0.2);
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

.contact-form button {
    background-color: #e6b121;
    color: white;
    padding: 12px;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-form button:hover {
    background-color: #d3a01a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(230,177,33,0.3);
}

/* 页脚 */
footer {
    background-color: #333;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #e6b121;
    font-weight: 600;
}

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

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

.footer-section ul li a {
    text-decoration: none;
    color: #ccc;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #555;
    color: #ccc;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        padding: 10px 0;
    }

    nav ul {
        margin: 10px 0;
        flex-wrap: wrap;
        justify-content: center;
    }

    nav ul li {
        margin: 0 15px;
    }

    .dropdown-content {
        position: static;
        box-shadow: none;
        border: 1px solid #f0f0f0;
        margin-top: 5px;
    }

    .banner h1 {
        font-size: 36px;
    }

    .banner h2 {
        font-size: 28px;
    }

    .banner p {
        font-size: 18px;
    }

    .business-scheme {
        grid-template-columns: 1fr;
    }

    .about-content,
    .contact-content {
        flex-direction: column;
    }

    .products-content {
        flex-direction: column;
    }

    .products-sidebar {
        flex: 1;
        border-right: none;
        border-bottom: 1px solid #f0f0f0;
        padding-bottom: 20px;
    }

    .product-detail {
        flex-direction: column;
    }

    .product-image {
        flex: 1;
    }

    .core-business h3,
    .tech-advantage h3,
    .about h3,
    .products h3,
    .solutions h3,
    .news h3,
    .contact h3 {
        font-size: 24px;
        margin-bottom: 40px;
    }

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

    .business-item {
        text-align: center;
    }

    .subunit {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .banner h1 {
        font-size: 28px;
    }

    .banner h2 {
        font-size: 24px;
    }

    .banner p {
        font-size: 16px;
    }

    .banner button {
        padding: 12px 30px;
        font-size: 16px;
    }

    .business-item,
    .advantage-item,
    .product-item,
    .solution-item,
    .news-item {
        padding: 20px;
    }

    .scheme-item {
        padding: 20px;
    }

    .subunit {
        padding: 10px;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

/* 产品详情弹出框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: #fefefe;
    margin: 10% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 800px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    position: relative;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 10px;
    right: 20px;
}

.close:hover {
    color: #e6b121;
    text-decoration: none;
    cursor: pointer;
}

.modal-body {
    padding: 20px 0;
}

.modal-body h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
    font-weight: 700;
}

.modal-body h3 {
    font-size: 18px;
    margin: 20px 0 10px;
    color: #333;
    font-weight: 600;
}

.modal-body p {
    margin-bottom: 15px;
    color: #666;
    line-height: 1.6;
}

.modal-body ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.modal-body ul li {
    color: #666;
    line-height: 1.5;
    margin-bottom: 5px;
}

.modal-body img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 20px 0;
}

/* 解决方案弹框图片 */
.solution-modal-image {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.solution-modal-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    margin: 0;
}

.solution-modal-content {
    margin-top: 20px;
}

/* 核心业务弹框图片 */
.business-modal-image {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.business-modal-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    margin: 0;
}

.business-modal-content {
    margin-top: 20px;
}

/* 新闻弹框图片 */
.news-modal-image {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.news-modal-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    margin: 0;
}

/* 核心业务详情样式 */
.business-detail {
    display: flex;
    gap: 40px;
    align-items: flex-start;
    padding: 30px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.business-image {
    flex: 0 0 400px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.business-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.business-info {
    flex: 1;
}

.business-info h4 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #333;
    font-weight: 700;
    border-bottom: 2px solid #e6b121;
    padding-bottom: 10px;
}

.business-info p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 25px;
    color: #666;
}

.business-info h5 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #333;
    font-weight: 600;
}

/* 响应式设计 - 核心业务 */
@media (max-width: 768px) {
    .business-detail {
        flex-direction: column;
    }
    
    .business-image {
        flex: 1;
    }
}