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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: transparent;
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    transition: all 0.3s ease;
    transform: translateY(0);
}

.header.hidden {
    transform: translateY(-100%);
}

.header.scrolled {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

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

.logo-text {
    color: #fff;
    font-weight: bold;
    font-size: 18px;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav {
    display: block;
}

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

.nav-link {
    color: #fff;
    text-decoration: none;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #00d4ff;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    list-style: none;
    min-width: 200px;
    overflow: hidden;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.3s ease;
}

.dropdown-menu a:hover {
    background: #f0f0f0;
    color: #00d4ff;
}

.carousel-section {
    margin-top: 0;
    width: 100%;
}

.carousel {
    position: relative;
    width: 100%;
    aspect-ratio: 1920 / 800;
    max-height: 700px;
    min-height: 250px;
    overflow: hidden;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.carousel-item.active {
    opacity: 1;
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
}

.carousel-prev,
.carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: none;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    border-radius: 50%;
    transition: background 0.3s ease;
    z-index: 2;
}

.carousel-prev:hover,
.carousel-next:hover {
    background: rgba(0, 0, 0, 0.7);
}

.carousel-prev {
    left: 20px;
}

.carousel-next {
    right: 20px;
}

.carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 2;
}

.indicator {
    width: 15px;
    height: 15px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: #fff;
    transform: scale(1.2);
}

.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #00d4ff, #0099cc);
}

.about-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.about-content {
    display: flex;
    gap: 60px;
    align-items: center;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.about-text {
    flex: 1;
    font-size: 16px;
    line-height: 1.8;
    color: #666;
}

.about-text p:first-child {
    margin-bottom: 20px;
}

.business-title {
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}

.business-list {
    list-style: none;
    padding-left: 0;
}

.business-list li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.business-list li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: #00d4ff;
}

.products-section {
    padding: 80px 0 0;
    background: #fff;
}

.section-title-white {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 0;
    position: relative;
}

.section-title-white::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #00d4ff, #0099cc);
}

.products-dark-bg {
    background: #1a1a2e;
    margin-top: 50px;
    padding: 60px 0;
}

.products-layout {
    display: flex;
    gap: 50px;
    align-items: flex-start;
}

.products-left {
    width: 400px;
    flex-shrink: 0;
}

.product-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.product-item {
    padding: 25px 0;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.product-item:hover,
.product-item.active {
}

.product-item .product-name {
    display: block;
    font-size: 24px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.product-item:hover .product-name,
.product-item.active .product-name {
    font-size: 32px;
    font-weight: 700;
    color: #00d4ff;
}

.product-item .product-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.product-item:hover .product-desc,
.product-item.active .product-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
}

.product-item {
    position: relative;
}

.product-arrow {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    font-weight: bold;
    color: rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    opacity: 0;
}

.product-item:hover .product-arrow,
.product-item.active .product-arrow {
    color: #00d4ff;
    opacity: 1;
    transform: translateY(-50%) translateX(-10px);
}

.products-right {
    flex: 1;
    position: relative;
    min-height: 500px;
}

.product-images {
    display: none;
}

.product-images.active {
    display: block;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    width: 100%;
    margin: 0;
    padding: 0;
}

.image-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    margin: 0;
    padding: 0;
}

.image-item-wide {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    grid-column: 1 / -1;
    height: 320px;
    margin: 0;
    padding: 0;
}

.image-item-wide .image-placeholder {
    width: 100%;
    height: 320px;
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #444;
    font-size: 14px;
}

.image-item-wide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.image-item img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    object-position: top center;
}

.image-placeholder {
    width: 100%;
    height: 320px;
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #444;
    font-size: 14px;
}

.image-arrow {
    position: absolute;
    bottom: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    background: rgba(0, 212, 255, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-item:hover .image-arrow,
.image-item-wide:hover .image-arrow {
    opacity: 1;
}

.image-arrow::after {
    content: '→';
    color: #fff;
    font-size: 16px;
    font-weight: bold;
}

.image-label {
    display: none;
    font-size: 12px;
}

.product-title {
    font-size: 24px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 15px;
}

.product-desc {
    font-size: 16px;
    color: #ddd;
    line-height: 1.8;
}

.news-section {
    padding: 80px 0;
    background: #fff;
}

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

.news-item-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.news-item {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.news-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.news-placeholder {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 14px;
}

.news-placeholder::before {
    content: '新闻图片占位';
}

.news-content {
    padding: 20px;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.news-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 10px;
}

.news-date {
    font-size: 12px;
    color: #999;
}

.partners-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.strategic-section {
    padding: 80px 0;
    background: #fff;
}

.strategic-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
    align-items: center;
}

.strategic-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

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

.strategic-item img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 10px;
}

.strategic-item span {
    font-size: 12px;
    color: #666;
    text-align: center;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
    align-items: center;
}

.partner-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

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

.partner-item img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 10px;
}

.partner-item span {
    font-size: 12px;
    color: #666;
}

.footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-section {
    padding: 20px;
}

.footer-section h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #00d4ff;
    border-bottom: 1px solid rgba(0, 212, 255, 0.3);
    padding-bottom: 10px;
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-list li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
    line-height: 1.6;
}

.product-list-footer {
    list-style: none;
    padding: 0;
    margin: 0;
}

.product-list-footer li {
    margin-bottom: 12px;
}

.product-list-footer li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.product-list-footer li a:hover {
    color: #00d4ff;
    padding-left: 10px;
}

.copyright-images {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.copyright-images img {
    max-width: 200px;
    max-height: 200px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.copyright-nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.copyright-nav button {
    background: rgba(0, 212, 255, 0.2);
    border: 1px solid rgba(0, 212, 255, 0.5);
    color: #00d4ff;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.copyright-nav button:hover {
    background: rgba(0, 212, 255, 0.4);
}

.copyright-nav #copyright-counter {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    min-width: 50px;
    text-align: center;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 12px;
    color: #999;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    cursor: pointer;
    z-index: 1002;
    transition: all 0.3s ease;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: #fff;
    margin: 3px 0;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(-45deg) translateY(8px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(45deg) translateY(-8px);
}

@media (max-width: 1024px) {
    .nav-link {
        padding: 10px 12px;
        font-size: 13px;
    }
    
    .carousel {
        aspect-ratio: 1280 / 500;
        max-height: 500px;
    }
    
    .products-layout {
        flex-direction: column;
        gap: 30px;
    }
    
    .products-left {
        width: 100%;
    }
    
    .product-list {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .product-item {
        flex: 1;
        min-width: 180px;
        padding: 15px;
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 8px;
        text-align: center;
    }
    
    .product-item .product-name {
        font-size: 16px;
    }
    
    .product-item:hover .product-name,
    .product-item.active .product-name {
        font-size: 18px;
    }
    
    .product-item .product-desc {
        font-size: 13px;
    }
    
    .product-arrow {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: linear-gradient(135deg, rgba(26, 26, 46, 0.98) 0%, rgba(22, 33, 62, 0.98) 100%);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1000;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .nav.active {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 0;
        padding: 40px 0;
    }
    
    .nav-list li {
        margin: 10px 0;
    }
    
    .nav-link {
        padding: 15px 30px;
        font-size: 18px;
        text-align: center;
        display: block;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .logo-text {
        display: none;
    }
    
    .logo img {
        height: 40px;
    }
    
    .carousel {
        aspect-ratio: 768 / 360;
        max-height: 380px;
        min-height: 280px;
    }
    
    .carousel-prev,
    .carousel-next {
        width: 35px;
        height: 35px;
        font-size: 18px;
    }
    
    .carousel-prev {
        left: 10px;
    }
    
    .carousel-next {
        right: 10px;
    }
    
    .carousel-indicators {
        gap: 10px;
        bottom: 15px;
    }
    
    .indicator {
        width: 10px;
        height: 10px;
    }
    
    .section-title,
    .section-title-white {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    .about-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .about-text {
        font-size: 14px;
    }
    
    .image-item img {
        height: 200px;
    }
    
    .image-grid {
        grid-template-columns: 1fr;
    }
    
    .products-dark-bg {
        padding: 40px 0;
    }
    
    .products-right {
        min-height: 300px;
    }
    
    .news-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-image {
        height: 150px;
    }
    
    .news-title {
        font-size: 16px;
    }
    
    .strategic-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 15px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 15px;
    }
    
    .strategic-item,
    .partner-item {
        padding: 15px 10px;
    }
    
    .strategic-item img,
    .partner-item img {
        width: 50px;
        height: 50px;
    }
    
    .strategic-item span,
    .partner-item span {
        font-size: 10px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-section {
        padding: 10px;
    }
    
    .footer-section h3 {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .contact-list li {
        font-size: 13px;
    }
    
    .copyright-images img {
        max-width: 150px;
        max-height: 150px;
    }
    
    .dropdown-menu {
        position: static;
        background: rgba(255, 255, 255, 0.05);
        min-width: 100%;
        border-radius: 0;
        box-shadow: none;
        margin-top: 10px;
    }
    
    .dropdown-menu a {
        color: rgba(255, 255, 255, 0.8);
        padding: 10px 20px;
        font-size: 15px;
        text-align: center;
    }
    
    .about-section,
    .news-section,
    .partners-section,
    .strategic-section,
    .products-section {
        padding: 40px 0;
    }
}

@media (max-width: 480px) {
    .carousel {
        aspect-ratio: 480 / 240;
        max-height: 280px;
        min-height: 200px;
    }
    
    .logo img {
        height: 35px;
    }
    
    .nav-link {
        font-size: 16px;
        padding: 12px 20px;
    }
    
    .section-title,
    .section-title-white {
        font-size: 20px;
    }
    
    .about-text {
        font-size: 13px;
    }
    
    .business-list li {
        padding-left: 15px;
        font-size: 13px;
    }
    
    .product-item {
        min-width: 100%;
    }
    
    .product-item .product-name {
        font-size: 14px;
    }
    
    .product-item:hover .product-name,
    .product-item.active .product-name {
        font-size: 16px;
    }
    
    .image-item img {
        height: 160px;
    }
    
    .news-image {
        height: 120px;
    }
    
    .news-title {
        font-size: 14px;
    }
    
    .news-desc {
        font-size: 13px;
    }
    
    .strategic-grid,
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }
    
    .strategic-item img,
    .partner-item img {
        width: 40px;
        height: 40px;
    }
    
    .strategic-item span,
    .partner-item span {
        font-size: 9px;
    }
    
    .footer-content {
        gap: 15px;
    }
    
    .contact-list li {
        font-size: 12px;
    }
    
    .copyright-images img {
        max-width: 120px;
        max-height: 120px;
    }
}