:root {
     --nkm-blue: #1f2d3d;
     --nkm-orange: #f39e0c;
 }

 .fade-in-up {
     opacity: 0;
     transform: translateY(30px);
     transition: opacity 0.6s ease, transform 0.6s ease;
 }

 .fade-in-up.visible {
     opacity: 1;
     transform: translateY(0);
 }

 .card-hover {
     transition: all 0.3s ease;
 }

 .card-hover:hover {
     transform: translateY(-8px);
     box-shadow: 0 12px 30px rgba(31, 45, 61, 0.15);
 }

 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
     font-family: "Microsoft YaHei", sans-serif;
 }

 body {
     color: #333;
     background: #fff;
     line-height: 1.7;
 }

 a {
     text-decoration: none;
     color: inherit;
 }

 ul {
     list-style: none;
 }

 :root {
     --nkm-blue: #1f2d3d;
     --nkm-orange: #f39e0c;
     --nkm-light: #e8f0f9;
     --nkm-gray: #f5f7fa;
 }

 /* 导航 */
 header {
     background: var(--nkm-blue);
     padding: 0%;
     position: sticky;
     top: 0;
     z-index: 999;
     box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
 }

 .nav {
     max-width: 90%;
     margin: 0 auto;
     display: flex;
     align-items: center;
     justify-content: space-between;
     height: 80px;
 }

 .logo-box {
     display: flex;
     align-items: center;
     gap: 12px;
     height: 80px;
 }

 .logo-img {
     height: 65px;
     width: auto;
     display: block;
     padding: 10px 25px 10px 25px;
 }

 .logo-text {
     color: #fff;
     font-size: 40px;
     font-weight: 600;
     white-space: nowrap;
     margin-left: 10px;
 }

 .nav-menu {
     display: flex;
     gap: 28px;
 }

 .nav-menu a {
     color: #fff;
     text-decoration: none;
     font-size: 16px;
     transition: color 0.3s;
     white-space: nowrap;
 }

 .nav-menu a:hover {
     color: var(--nkm-orange);
 }

 /* 首屏Banner */
 .banner {
     height: 400px;
     background: linear-gradient(rgba(31, 45, 61, 0.75), rgba(31, 45, 61, 0.75)),
         url(https://picsum.photos/id/1019/1920/800) center/cover no-repeat;
     display: flex;
     align-items: center;
     justify-content: center;
     text-align: center;
     color: #fff;
 }

 .banner h1 {
     font-size: 40px;
     margin-bottom: 18px;
 }

 .banner p {
     font-size: 18px;
     margin-bottom: 35px;
     opacity: 0.9;
 }

 .btn {
     padding: 13px 35px;
     background: #409eff;
     border-radius: 4px;
     color: #fff;
     font-size: 16px;
     transition: 0.3s;
 }

 .btn:hover {
     background: #2b7cd3;
 }

 /* 通用区块 */
 .container {
     max-width: 85%;
     margin: 0 auto;
     padding: 70px 20px;
 }

 .section-title {
     text-align: center;
     margin-bottom: 60px;
 }

 .section-title h2 {
     font-size: 32px;
     color: var(--nkm-blue);
     margin-bottom: 12px;
 }

 .section-title h2::after {
     content: "";
     display: block;
     width: 50px;
     height: 3px;
     background: var(--nkm-orange);
     margin: 10px auto 0;
 }

 .section-title p {
     color: #666;
     font-size: 16px;
 }

 /* 单机设备卡片 */
 .machine-box {
     display: grid;
     grid-template-columns: 1fr;
     gap: 40px;
 }

 .machine-card {
     background: #fff;
     border-radius: 12px;
     overflow: hidden;
     box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
     transition: all 0.3s;
     display: flex;
     height: 500px;
 }

 .machine-card:hover {
     transform: translateY(-8px);
     box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
 }

 .machine-img-box {
     width: 45%;
     min-width: 280px;
     height: 100%;
     overflow: hidden;
     background: var(--nkm-light);
     flex-shrink: 0;
 }

 .machine-img-box img {
     width: 100%;
     height: 100%;
     object-fit: contain;
     transition: transform 0.3s;
 }

 .machine-card:hover .machine-img-box img {
     transform: scale(1.05);
 }

 .machine-card .content {
     flex: 1;
     padding: 30px;
     display: flex;
     flex-direction: column;
     overflow: hidden;
 }

 .machine-card h3 {
     font-size: 22px;
     color: var(--nkm-blue);
     margin-bottom: 12px;
     border-left: 4px solid var(--nkm-orange);
     padding-left: 12px;
 }

 .machine-card .desc {
     color: #555;
     margin-bottom: 16px;
     font-size: 14px;
     line-height: 1.7;
 }

 .machine-card ul {
     margin-bottom: 20px;
 }

 .machine-card ul li {
     padding: 6px 0;
     color: #555;
     position: relative;
     padding-left: 20px;
     font-size: 14px;
     line-height: 1.6;
 }

 .machine-card ul li::before {
     content: "✓";
     color: var(--nkm-orange);
     position: absolute;
     left: 0;
     font-weight: bold;
 }

 .machine-card .specs {
     background: var(--nkm-gray);
     padding: 15px;
     border-radius: 6px;
     margin-top: 15px;
 }

 .machine-card .specs p {
     font-size: 13px;
     color: #666;
     margin-bottom: 5px;
 }

 .machine-card .specs p:last-child {
     margin-bottom: 0;
 }

 /* 产品特性 */
 .features {
     background: var(--nkm-gray);
 }

 .features-grid {
     display: grid;
     grid-template-columns: repeat(4, 1fr);
     gap: 30px;
 }

 .feature-item {
     background: #fff;
     padding: 30px;
     border-radius: 10px;
     text-align: center;
     transition: transform 0.3s;
 }

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

 .feature-icon {
     font-size: 40px;
     margin-bottom: 15px;
     color: var(--nkm-orange);
 }

 .feature-item h4 {
     font-size: 18px;
     color: var(--nkm-blue);
     margin-bottom: 10px;
 }

 .feature-item p {
     font-size: 14px;
     color: #666;
     line-height: 1.6;
 }

 /* 底部信息 */
 .footer-top {
     background: var(--nkm-blue);
     color: #fff;
 }

 .footer-row {
     max-width: 1400px;
     margin: 0 auto;
     padding: 50px 5%;
     display: flex;
     flex-wrap: wrap;
     gap: 50px;
 }

 .footer-col {
     flex: 1;
     min-width: 260px;
 }

 .footer-col h4 {
     font-size: 20px;
     margin-bottom: 20px;
     padding-bottom: 10px;
     border-bottom: 2px solid var(--nkm-orange);
     display: inline-block;
 }

 .footer-col p {
     margin-bottom: 10px;
     line-height: 1.7;
 }

 .footer-col a {
     color: #fff;
     text-decoration: none;
 }

 .footer-col a:hover {
     color: var(--nkm-orange);
 }

 footer {
     background: var(--nkm-blue);
     color: rgba(255, 255, 255, 0.7);
     text-align: center;
     padding: 20px 5%;
     font-size: 14px;
 }

 /* 移动端适配 */
 @media(max-width:1024px) {
     .machine-box {
         grid-template-columns: repeat(2, 1fr);
     }

     .features-grid {
         grid-template-columns: repeat(2, 1fr);
     }
 }

 @media(max-width:768px) {
     .nav {
         flex-direction: column;
         padding: 10px 0;
         height: auto;
     }

     .nav-menu {
         margin-top: 10px;
     }

     .banner h1 {
         font-size: 28px;
     }

     .banner {
         height: 320px;
     }

     .machine-box {
         grid-template-columns: 1fr;
     }

     .features-grid {
         grid-template-columns: 1fr;
     }

     .container {
         padding: 50px 15px;
     }
 }

 .NKM-A {
     margin-left: 80px;
 }