* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
body {
    background-color: #f5f5f5;
}
/*导航*/
header{background-color: rgba(255, 255, 255, 0.9);position: fixed;width: 100%;top: 0;z-index: 1000;}
.navbar {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    position: relative;
}
.logo {
    padding: 5px 0;
}
.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    position: relative;
}

.nav-link {
    color: #444;
    text-decoration: none;
    padding: 20px 15px;
    display: block;
    transition: all 0.3s ease;
    font-weight: 500;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background-color: #2c5aa0;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}
.nav-link:hover {
    color: #2c5aa0;
}
.nav-link:hover::after {
    width: 80%;
}
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.nav-links li:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 12px 20px;
    color: #555;
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 400;
}

.dropdown-item:hover {
    background-color: #f5f7ff;
    color: #2c5aa0;
    padding-left: 25px;
}

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

.lang-switcher {
    position: relative;
}

.lang-btn {
    background-color: transparent;
    border: 1px solid #e0e0e0;
    color: #555;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    font-weight: 500;
}

.lang-btn:hover {
    background-color: #f5f7ff;
    border-color: #2c5aa0;
    color: #2c5aa0;
}

.lang-btn::after {
    content: "▼";
    font-size: 10px;
    margin-left: 8px;
    color: #888;
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: white;
    min-width: 140px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all 0.3s ease;
    z-index: 1000;
    border: 1px solid #f0f0f0;
    padding: 8px 0;
}

.lang-switcher:hover .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    padding: 10px 16px;
    color: #555;
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 400;
}

.lang-option:hover {
    background-color: #f5f7ff;
    color: #2c5aa0;
}

.lang-option.active {
    background-color: #f0f4ff;
    color: #2c5aa0;
    font-weight: 500;
}

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

    .nav-menu {
        flex-direction: column;
        width: 100%;
        margin: 10px 0;
    }

    .nav-link {
        padding: 15px;
        border-bottom: 1px solid #f0f0f0;
    }
    .nav-link::after {
        display: none;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        background-color: #f9f9f9;
        display: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        margin-left: 15px;
        border-radius: 0;
        border: none;
        border-left: 2px solid #e0e0e0;
    }

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

    .lang-switcher {
        align-self: flex-end;
        margin-top: 0px;
    }
}
/*banner*/
.banner-container {
    position: relative;
    width: 100%;
    height: 800px;
    overflow: hidden;
    padding-top: 96px;
}
.banner-slider {
    width: 100%;
    height: 100%;
    position: relative;
}
.banner-slide {
    width: 100%;
    height: 100%;
    display: none;
    transition: opacity 1s ease-in-out;
    background-size: cover;
    background-position: center;
}
.banner-slide.active {
    display: block;
}
.banner-slide img{width:100%
    
}
.banner-controls {
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.indicators {
    display: flex;
    gap: 10px;
}
.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background-color: white;
    transform: scale(1.2);
}

.prev-btn, .next-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.prev-btn:hover, .next-btn:hover {
    background-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

@media (max-width: 768px) {
    .banner-container {
        height: auto;
        padding-top: 0px;
    }
    
    .slide-content h2 {
        font-size: 1.8rem;
    }
    
    .slide-content p {
        font-size: 1rem;
    }
    
    .prev-btn, .next-btn {
        width: 40px;
        height: 40px;
    }
}
/*产品中心*/
.product-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 0;
}

.product-cont-title {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 2.2rem;
    font-weight: 600;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 25px;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.product-info {
    padding: 20px;
}

.product-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.product-description {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 15px;
}

.product-link {
    display: inline-block;
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.product-link:hover {
    color: #2980b9;
}

.product-link::after {
    content: '→';
    margin-left: 5px;
    transition: transform 0.2s;
}

.product-link:hover::after {
    transform: translateX(3px);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
}
/*技术优势*/
.advantage-container {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding-bottom: 40px;
}

.advantage-cont-header {
    text-align: center;
    margin-bottom: 30px;
}

.advantage-cont-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.advantage-cont-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #3498db, #2ecc71);
    border-radius: 2px;
}

.advantage-cont-subtitle {
    font-size: 1.1rem;
    color: #7f8c8d;
    max-width: 700px;
    margin: 0 auto;
}

.advantages-tabs {
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.tab-headers {
    display: flex;
    background: #f8f9fa;
    border-bottom: 1px solid #eaeaea;
}

.tab-header {
    flex: 1;
    padding: 20px 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.tab-header.active {
    background: white;
    border-bottom: 3px solid #3498db;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.tab-icon {
    font-size: 28px;
    color: #7f8c8d;
    transition: all 0.3s ease;
}

.tab-header.active .tab-icon {
    color: #3498db;
    transform: scale(1.1);
}

.tab-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    transition: all 0.3s ease;
}

.tab-header.active .tab-title {
    color: #3498db;
}

.tab-content {
    padding: 20px;
    min-height: 310px;
    position: relative;
    overflow: hidden;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.5s ease forwards;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.advantage-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3498db, #2ecc71);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 60px;
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.3);
}

.advantage-text {
    flex: 1.5;
}

.advantage-heading {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
}

.advantage-description {
    color: #5d6d7e;
    margin-bottom: 25px;
    font-size: 1.05rem;
    line-height: 1.7;
}

.advantage-features {
    list-style-type: none;
}

.advantage-features li {
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
    color: #5d6d7e;
}

.advantage-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2ecc71;
    font-weight: bold;
}

.stats-section {
    margin-top: 30px;
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.stats-title {
    text-align: center;
    font-size: 1.8rem;
    color: #2c3e50;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3498db;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1rem;
    color: #7f8c8d;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .advantage-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    
    .advantage-text {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .tab-headers {
        flex-wrap: wrap;
    }
    
    .tab-header {
        flex: 1 0 25%;
        padding: 15px 10px;
    }
    
    .tab-content {
        padding: 30px 20px;
    }
    
    .advantage-heading {
        font-size: 1.6rem;
    }
    
    .image-placeholder {
        width: 150px;
        height: 150px;
        font-size: 50px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.8rem;
    }
    
    .tab-header {
        flex: 1 0 25%;
    }
    .tab-title {
        font-size: 1rem;
    }
    .stats-section {
        padding: 15px 10px;
    }
    .stats-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 0px;
    }
    .stat-item {
        padding: 0px;
        flex: 1 0 25%;
    }
    .stat-number{
        font-size: 1.5rem;
    }
}
/*新闻中心*/
.news-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 新闻中心头部 */
.news-header {
    text-align: center;
    padding: 10px 0 20px;
}

.news-header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

.news-header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

/* 新闻内容区域 */
.news-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .news-content {
        grid-template-columns: 1fr;
    }
}

/* 特色新闻 */
.featured-news {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.featured-news img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.featured-content {
    padding: 25px;
}

.featured-content h2 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.featured-content p {
    color: #7f8c8d;
    margin-bottom: 20px;
}

.read-more {
    display: inline-block;
    padding: 10px 20px;
    background: #3498db;
    color: white;
    border-radius: 4px;
    text-decoration: none;
    transition: background 0.3s;
}

.read-more:hover {
    background: #2980b9;
}

/* 最新新闻 */
.latest-news {
    background: white;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.latest-news h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #2c3e50;
    padding-bottom: 10px;
    border-bottom: 1px solid #eaeaea;
}

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

.news-item {
    padding: 10px 0;
    border-bottom: 1px solid #f1f1f1;
    display: flex;
    align-items: flex-start;
}

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

.news-date {
    background: #f8f9fa;
    padding: 5px 12px;
    border-radius: 4px;
    margin-right: 15px;
    text-align: center;
    min-width: 70px;
}

.news-date .day {
    font-size: 1.5rem;
    font-weight: bold;
    color: #3498db;
}

.news-date .month {
    font-size: 0.8rem;
    color: #7f8c8d;
}

.news-info h3 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.news-info h3 a {
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s;
}

.news-info h3 a:hover {
    color: #3498db;
}

.news-info p {
    font-size: 0.9rem;
    color: #7f8c8d;
}

/* 新闻网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.news-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
}

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

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.card-content h3 a {
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s;
}

.card-content h3 a:hover {
    color: #3498db;
}

.card-content p {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #95a5a6;
}

/* 加载更多按钮 */
.load-more {
    text-align: center;
    margin-bottom: 50px;
}

.load-more button {
    padding: 12px 30px;
    background: white;
    border: 1px solid #3498db;
    color: #3498db;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
}

.load-more button:hover {
    background: #3498db;
    color: white;
}
/*footer*/
footer {
  background-color: #2c3e50;
  color: #ecf0f1;
  padding: 40px 0 20px;
  font-family: Arial, sans-serif;
}

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

/* 导航链接样式 */
footer span a {
  color: #bdc3c7;
  text-decoration: none;
  margin-right: 25px;
  font-size: 14px;
  transition: color 0.3s ease;
}

footer span a:hover {
  color: #3498db;
}

.clearfix {
  clear: both;
}

/* 公司信息区域 */
footer .corp {
  display: flex;
  justify-content: space-between;
  margin: 30px 0;
  padding: 20px 0;
  border-top: 1px solid #34495e;
  border-bottom: 1px solid #34495e;
}

footer .cor p {
  margin: 8px 0;
  font-size: 14px;
  line-height: 1.6;
}

/* 右侧联系信息 */
footer .act {
  display: flex;
  gap: 40px;
}

footer .wx, footer .tel {
  text-align: center;
}

footer .wx p, footer .tel p {
  margin-bottom: 10px;
  font-size: 14px;
}

/* 微信二维码并排显示 */
footer .wx {
  display: flex;
  align-items: center;
  gap: 40px;
}

footer .wx  div {
  display: flex;
  justify-content: center;
}

footer .wx img {
  width: 100px;
  height: 100px;
  border: 1px solid #34495e;
}

footer .tel .number {
  font-size: 24px;
  font-weight: bold;
  color: #3498db;
  margin: 10px 0;
}

footer .tel .kf {
  background-color: #e74c3c;
  color: white;
  padding: 8px 15px;
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  transition: background-color 0.3s ease;
}

footer .tel .kf:hover {
  background-color: #c0392b;
}

/* 友情链接 */
footer .links {
  margin: 20px 0;
  font-size: 14px;
}

footer .links a {
  color: #3498db;
  text-decoration: none;
  margin-right: 15px;
}

footer .links a:hover {
  text-decoration: underline;
}

/* 版权信息 */
footer .banquan {
  text-align: center;
  font-size: 12px;
  color: #95a5a6;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid #34495e;
}

footer .banquan a {
  color: #95a5a6;
  text-decoration: none;
  margin-left: 5px;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
  footer .corp {
    flex-direction: column;
  }
  
  footer .act {
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
  }
  
  footer .wx > div {
    flex-direction: row;
    gap: 15px;
  }
  
  footer span a {
    display: block;
    margin: 5px 0;
  }
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #1e5799 0%, #207cca 100%);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(30, 87, 153, 0.3);
    transition: all 0.3s ease;
    text-decoration: none;
    z-index: 1000;
}

.back-to-top:hover {
    background: linear-gradient(135deg, #16457a 0%, #1a6ba8 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(30, 87, 153, 0.4);
}

.back-to-top:active {
    transform: translateY(-1px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
    
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 15px;
        right: 15px;
        font-size: 18px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .content {
        grid-template-columns: 1fr;
    }
}