:root {
     --base-primary-color: #4361ee;
     --base-secondary-color: #3a0ca3;
     --base-accent-color: #f72585;
     --base-light-color: #f8f9fa;
     --base-dark-color: #212529;
     --base-gray-100: #f8f9fa;
     --base-gray-200: #e9ecef;
     --base-gray-300: #dee2e6;
     --base-gray-400: #ced4da;
     --base-gray-500: #adb5bd;
     --base-gray-600: #6c757d;
     --base-gray-700: #495057;
     --base-gray-800: #343a40;
     --base-gray-900: #212529;
     --base-border-radius: 0.375rem;
     --base-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
     --base-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
     --base-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
 }

 /* 重置样式 */
 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }

 body {
     font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
     line-height: 1.5;
     color: var(--base-dark-color);
     background-color: #fff;
     overflow-x: hidden;
 }

 /* 容器类 - 响应式 */
 .base-container,
 .container {
     width: 100%;
     max-width: 1480px;
     margin: 0 auto;
     padding: 0 20px;
 }

 /* 按钮样式 */
 .base-btn {
     padding: 0.375rem 0.75rem;
     font-size: 1rem;
     line-height: 1.5;
     border: 1px solid var(--base-primary-color);
     border-radius: var(--base-border-radius);
     cursor: pointer;
     transition: all 0.2s ease;
 }

 .base-btn-outline-primary {
     background-color: transparent;
     color: var(--base-primary-color);
     border-radius: 0 var(--base-border-radius) var(--base-border-radius) 0;
 }

 .base-btn-outline-primary:hover {
     background-color: var(--base-primary-color);
     color: white;
 }

 /* 网格系统 */
 .base-row {
     display: flex;
     flex-wrap: wrap;
     margin: -15px;
 }

 .base-col-md-4 {
     flex: 0 0 33.333333%;
     max-width: 33.333333%;
     padding: 15px;
 }

 /* 卡片样式 */
 .base-card {
     background: white;
     border-radius: 0.5rem;
     overflow: hidden;
     transition: transform 0.3s ease, box-shadow 0.3s ease;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
     height: 100%;
     display: flex;
     flex-direction: column;
 }

 .base-card:hover {
     transform: translateY(-5px);
     box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
 }

 .base-card-img-top {
     width: 100%;
     height: 200px;
     object-fit: cover;
 }

 .base-card-body {
     padding: 1.25rem;
     flex-grow: 1;
     display: flex;
     flex-direction: column;
 }

 .base-card-title {
     font-size: 1.25rem;
     font-weight: 500;
     margin-bottom: 0.75rem;
 }

 .base-card-text {
     color: var(--base-gray-600);
     margin-bottom: 1rem;
     flex-grow: 1;
 }

 /* 徽章样式 */
 .base-category-badge {
     display: inline-block;
     padding: 0.25rem 0.75rem;
     font-size: 0.875rem;
     font-weight: 500;
     background: linear-gradient(135deg, var(--base-primary-color), var(--base-secondary-color));
     color: white;
     border-radius: 50px;
     margin-bottom: 0.75rem;
 }

 .base-tag-badge {
     display: inline-block;
     padding: 0.25rem 0.5rem;
     font-size: 0.75rem;
     background-color: var(--base-gray-200);
     color: var(--base-gray-700);
     border-radius: 4px;
     margin-right: 0.25rem;
     margin-bottom: 0.25rem;
 }

 /* 页头样式 */
 .base-page-header {
     background: linear-gradient(135deg, var(--base-primary-color), var(--base-secondary-color));
     color: white;
     padding: 60px 0;
     margin-bottom: 40px;
     border-radius: 0 0 20px 20px;
 }

 /* 规格项样式 */
 .base-spec-item {
     background: var(--base-light-color);
     padding: 8px 15px;
     border-radius: 20px;
     margin: 5px;
     display: inline-block;
     font-size: 0.9em;
 }

 /* 页脚样式 */
 .base-footer {
     background-color: var(--base-dark-color);
     color: white;
     padding: 40px 0;
     margin-top: 60px;
 }

 .base-footer h5 {
     color: white;
     margin-bottom: 1rem;
     font-size: 1.25rem;
 }

 .base-footer ul {
     list-style: none;
     padding: 0;
 }

 .base-footer ul li {
     margin-bottom: 0.5rem;
 }

 .base-footer a {
     color: rgba(255, 255, 255, 0.5) !important;
     text-decoration: none;
     transition: color 0.2s ease;
 }

 .base-footer a:hover {
     color: rgba(255, 255, 255, 0.75) !important;
 }

 /* 文本对齐类 */
 .base-text-center {
     text-align: center;
 }

 .base-small {
     font-size: 0.875em;
 }

 /* 水平线 */
 .base-hr {
     border: 0;
     border-top: 1px solid rgba(255, 255, 255, 0.1);
     margin: 2rem 0;
 }

 /* 列表样式 */
 .base-list-unstyled {
     list-style: none;
 }

 /* 边距工具类 */
 .base-mb-0 {
     margin-bottom: 0 !important;
 }

 .base-mt-2 {
     margin-top: 0.5rem;
 }

 .base-mt-3 {
     margin-top: 1rem;
 }

 .base-mb-2 {
     margin-bottom: 0.5rem;
 }

 .base-mb-3 {
     margin-bottom: 1rem;
 }

 .base-mb-4 {
     margin-bottom: 1.5rem;
 }

 /* 文本颜色类 */
 .base-text-white-50 {
     color: rgba(255, 255, 255, 0.5);
 }

 /* Font Awesome 图标备用方案 */
 .base-fas {
     font-family: "Font Awesome 6 Free";
     font-weight: 900;
 }

 .base-fa-code:before {
     content: "</>";
 }

 .base-fa-search:before {
     content: "🔍";
 }

 /* 响应式设计 */
 @media (max-width: 992px) {
     .base-col-md-4 {
         flex: 0 0 100%;
         max-width: 100%;
     }

     .base-row {
         margin: -10px;
     }

     .base-col-md-4 {
         padding: 10px;
     }

     .base-page-header {
         padding: 40px 0;
         margin-bottom: 30px;
         border-radius: 0 0 15px 15px;
     }

     .base-card-img-top {
         height: 180px;
     }
 }

 @media (min-width: 768px) and (max-width: 992px) {
     .base-col-md-4 {
         flex: 0 0 50%;
         max-width: 50%;
     }
 }

 @media (max-width: 768px) {

     .base-container,
     .container {
         padding: 0 15px;
     }

     .base-page-header {
         padding: 30px 0;
         margin-bottom: 25px;
         border-radius: 0 0 12px 12px;
     }

     .base-card-body {
         padding: 1rem;
     }

     .base-card-title {
         font-size: 1.1rem;
     }

     .base-footer {
         padding: 30px 0;
         margin-top: 40px;
     }
 }

 /* 工具类 - 对齐 */
 .base-d-flex {
     display: flex;
 }

 .base-justify-content-between {
     justify-content: space-between;
 }

 .base-align-items-center {
     align-items: center;
 }

 .base-flex-wrap {
     flex-wrap: wrap;
 }

 .base-flex-column {
     flex-direction: column;
 }

 .base-align-items-start {
     align-items: flex-start;
 }

 /* 工具类 - 显示 */
 .base-d-block {
     display: block;
 }

 .base-d-inline-block {
     display: inline-block;
 }

 .base-w-100 {
     width: 100%;
 }



 /* 导航栏样式 - 响应式 */
 .header {
     top: 0;
     left: 0;
     margin: 0 auto;
     background-color: #fff;
     box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
     position: fixed;
     width: 100%;
     z-index: 1000;
 }

 .header-container {
     width: 100%;
     max-width: 1480px;
     margin: 0 auto;
     padding: 0 20px;
 }

 .header-nav {
     display: flex;
     justify-content: space-between;
     align-items: center;
     padding: 15px 0;
     position: relative;
 }

 /* 搜索框样式 */
 .header-search-container {
     margin-left: 20px;
     max-width: 220px;
     width: 100%;
 }

 .header-navbar-form {
     display: flex;
     width: 100%;
 }

 .header-form-control {
     flex: 1;
     padding: 8px 12px;
     font-size: 14px;
     line-height: 1.5;
     color: #333;
     background-color: #f8f9fa;
     border: 1px solid #e9ecef;
     border-radius: 20px 0 0 20px;
     transition: all 0.3s ease;
     min-width: 160px;
 }

 .header-form-control:focus {
     outline: none;
     border-color: #4a90e2;
     background-color: #fff;
     box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
 }

 .header-btn {
     padding: 8px 16px;
     font-size: 14px;
     line-height: 1.5;
     border: 1px solid #4a90e2;
     border-radius: 0 20px 20px 0;
     cursor: pointer;
     transition: all 0.3s ease;
     background-color: #4a90e2;
     color: white;
     border-left: none;
     display: flex;
     align-items: center;
     justify-content: center;
 }

 .header-btn:hover {
     background-color: #1a56a7;
     border-color: #1a56a7;
 }

 .header-btn svg {
     width: 16px;
     height: 16px;
 }

 /* 导航样式 */
 .header-logo {
     font-size: 24px;
     font-weight: bold;
     color: #1a56a7;
     text-decoration: none;
     white-space: nowrap;
     margin-right: 30px;
 }

 .header-logo span {
     color: #ff0000;
 }

 .header-nav-links {
     display: flex;
     list-style: none;
     gap: 15px;
     margin: 0;
     padding: 0;
     flex: 1;
     justify-content: flex-end;
 }

 .header-nav-links li {
     position: relative;
 }

 .header-nav-links a {
     color: #1a56a7;
     font-weight: 500;
     transition: color 0.3s ease;
     padding: 8px 6px;
     position: relative;
     text-decoration: none;
     white-space: nowrap;
     font-size: 16px;
 }

 .header-nav-links a::after {
     content: '';
     position: absolute;
     bottom: 0;
     left: 0;
     width: 0;
     height: 2px;
     background-color: #1a56a7;
     transition: width 0.3s ease;
 }

 .header-nav-links a:hover::after,
 .header-nav-links a.header-active::after {
     width: 100%;
 }

 .header-nav-links a:hover {
     color: #1a56a7;
 }

    .header-nav-links .active {
        /* color: #d8119c; */
        font-weight: 600;
    }

        .header-active{
            font-weight: 600;
        }

 /* 移动端菜单切换按钮 */
 .header-menu-toggle {
     display: none;
     flex-direction: column;
     gap: 4px;
     cursor: pointer;
     padding: 8px;
     margin-left: 10px;
 }

 .header-menu-toggle span {
     width: 25px;
     height: 3px;
     background-color: #1a56a7;
     transition: all 0.3s ease;
 }

 /* 移动端响应式 */
 @media (max-width: 1024px) {
     .header-nav-links {
         gap: 12px;
     }

     .header-search-container {
         max-width: 200px;
         margin-left: 15px;
     }

     .header-logo {
         margin-right: 20px;
     }
 }

 @media (max-width: 768px) {
     .header-container {
         padding: 0 15px;
     }

     .header-nav {
         flex-wrap: wrap;
         padding: 10px 0;
     }

     .header-menu-toggle {
         display: flex;
         order: 2;
     }

     .header-logo {
         flex: 1;
         margin-right: 0;
         font-size: 20px;
     }

     .header-nav-links {
         position: absolute;
         top: 100%;
         left: 0;
         width: 100%;
         background-color: #fff;
         flex-direction: column;
         gap: 0;
         box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
         max-height: 0;
         overflow: hidden;
         transition: max-height 0.3s ease;
         z-index: 1000;
         justify-content: flex-start;
         margin-top: 10px;
     }



     .header-nav-links.header-active {
         max-height: 400px;
         padding: 10px 0;
     }

     .header-nav-links li {
         width: 100%;
         text-align: center;
         border-bottom: 1px solid #f0f0f0;
     }

     .header-nav-links li:last-child {
         border-bottom: none;
     }

     .header-nav-links a {
         display: block;
         padding: 12px 15px;
         width: 100%;
         font-size: 15px;
     }

     .header-nav-links a::after {
         display: none;
     }

     .header-search-container {
         order: 3;
         max-width: 100%;
         margin: 15px 0 0 0;
         width: 100%;
     }

     .header-navbar-form {
         width: 100%;
     }
 }

 @media (max-width: 480px) {
     .header-logo {
         font-size: 18px;
     }

     .header-form-control {
         font-size: 13px;
         padding: 6px 10px;
     }

     .header-btn {
         padding: 6px 12px;
         font-size: 13px;
     }

     .header-nav-links a {
         padding: 10px 15px;
         font-size: 14px;
     }
 }



 /* 页脚 - 响应式 */
 footer {
     background-color: #0d3b7a;
     color: white;
     padding: 50px 0 20px;
 }

 .footer-content {
     width: 100%;
     max-width: 1400px;
     margin: 0 auto;
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
     gap: 30px;
     padding: 0 20px;
 }

 .footer-column h3 {
     font-size: 18px;
     margin-bottom: 20px;
     color: #ffffff;
 }

 .footer-column p,
 .footer-column ul li {
     color: rgba(255, 255, 255, 0.8);
     line-height: 1.6;
 }

 .footer-column ul {
     list-style: none;
     padding: 0;
 }

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

 .footer-column ul li a {
     color: rgba(255, 255, 255, 0.8);
     text-decoration: none;
     transition: color 0.3s ease;
 }

 .footer-column ul li a:hover {
     color: #ffffff;
     text-decoration: underline;
 }

 .copyright {
     text-align: center;
     padding-top: 20px;
     border-top: 1px solid rgba(255, 255, 255, 0.1);
     font-size: 14px;
     width: 100%;
     max-width: 1400px;
     margin: 30px auto 0;
     color: rgba(255, 255, 255, 0.6);
     padding: 0 20px;
 }

 @media (max-width: 992px) {
     footer {
         padding: 40px 0 20px;
     }

     .footer-content {
         grid-template-columns: repeat(2, 1fr);
         gap: 25px;
     }
 }

 @media (max-width: 768px) {
     footer {
         padding: 30px 0 15px;
     }

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

     .footer-column h3 {
         font-size: 16px;
         margin-bottom: 15px;
     }

     .footer-column p,
     .footer-column ul li {
         font-size: 14px;
     }

     .copyright {
         font-size: 13px;
         margin-top: 20px;
         padding-top: 15px;
     }
 }

 @media (max-width: 480px) {
     .footer-column {
         text-align: center;
     }
 }



 /* 联系我们区域 - 响应式 */
 .product-contact {
     width: 100%;
     max-width: 1400px;
     margin: 0 auto;
     padding: 60px 20px;
     background: white;
    }

 .product-contact-info {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
     gap: 25px;
     margin-top: 40px;
 }

 .product-section-title {
     font-size: clamp(1.5rem, 3vw, 2rem);
     margin-bottom: 40px;
     color: #1a56a7;
     text-align: center;
     font-weight: 700;
     position: relative;
     line-height: 1.3;
 }

 .product-section-title::after {
     content: '';
     display: block;
     width: 80px;
     height: 4px;
     background: linear-gradient(90deg, #1a56a7, #4a90e2);
     margin: 20px auto 0;
     border-radius: 2px;
 }

 .contact-card {
     text-align: center;
     padding: 25px 20px;
     background: linear-gradient(135deg, #f8fafc, #e8f2ff);
     border-radius: 12px;
     transition: all 0.3s ease;
     height: 100%;
     display: flex;
     flex-direction: column;
     align-items: center;
     justify-content: center;
 }

 .contact-card:hover {
     transform: translateY(-5px);
     box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
 }
 .contact-card a{
    text-decoration: none;
    color: #7f8c8d;
 }

 .contact-icon {
     font-size: clamp(2rem, 4vw, 2.5rem);
     color: #1a56a7;
     margin-bottom: 15px;
     display: inline-block;
 }

 .contact-card h3 {
     font-size: clamp(1rem, 2vw, 1.125rem);
     margin-bottom: 10px;
     color: #2c3e50;
     font-weight: 600;
 }

 .contact-card p {
     color: #7f8c8d;
     margin: 0;
     font-size: clamp(0.875rem, 1.5vw, 1rem);
     line-height: 1.5;
 }

 @media (max-width: 992px) {
     .product-contact {
         padding: 50px 20px;
     }

     .product-contact-info {
         grid-template-columns: repeat(2, 1fr);
         gap: 20px;
     }

     .contact-card {
         padding: 20px 15px;
     }
 }

 @media (max-width: 768px) {
     .product-contact {
         padding: 40px 15px;
     }

     .product-section-title {
         margin-bottom: 30px;
         font-size: 1.5rem;
     }

     .product-contact-info {
         grid-template-columns: 1fr;
         gap: 15px;
         max-width: 500px;
         margin: 30px auto 0;
     }

     .contact-card {
         padding: 20px;
     }

     .contact-icon {
         font-size: 2rem;
         margin-bottom: 12px;
     }

     .contact-card h3 {
         font-size: 1.125rem;
     }

     .contact-card p {
         font-size: 0.875rem;
     }
 }

 @media (max-width: 480px) {
     .product-contact {
         padding: 30px 10px;
     }

     .product-section-title {
         font-size: 1.3rem;
         margin-bottom: 25px;
     }

     .product-contact-info {
         gap: 12px;
     }

     .contact-card {
         padding: 15px;
     }
 }