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

    a:link,a:visited,a:active{ 
        color: #4a5568;
        text-decoration: none;
    }
    a:hover{color:var(--primary-red)}
    
    body {
      font-family: 'Inter', sans-serif;
      background: #ffffff;
      color: #1e1e2f;
      line-height: 1.4;
      overflow-x: hidden;
    }

    :root {
      --primary-red: #e31b23;
      --primary-dark: #b1121a;
      --red-light: #fbe9ea;
      --gray-bg: #f8f9fc;
      --border-light: #eef2f6;
    }
    
    video {
          width: 100%;
          height: auto;
          max-width: 100%;
          display: block; /* 去除底部空隙 */
        }

    .container {
      max-width: 1440px;
      margin: 0 auto;
      padding: 0 40px;
    }

    /* ========== HEADER ========== */
    .top-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 12px 0;
      border-bottom: 1px solid var(--border-light);
      flex-wrap: wrap;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-img {
      max-width: 48px;
      height: 48px;
      /*border-radius: 14px;*/
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 28px;
    }
    .logo-text h1 {
      font-size: 26px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #1e1e2f;
    }
    .logo-text span {
      font-weight: 400;
      color: var(--primary-red);
    }
    .right-header {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 12px;
    }
    .search-lang-row {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: #f5f7fa;
      border-radius: 40px;
      padding: 8px 18px;
      gap: 10px;
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 14px;
      width: 180px;
    }
      .searchbox {
      display: flex;
      align-items: center;
      background: #f5f7fa;
      border-radius: 40px;
      padding: 8px 18px;
      gap: 10px;
      margin:0px 15px;
      width: 280px;
    }
      .searchbox input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 14px;
      width: 180px;
    }
    .lang-list {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .lang-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      cursor: pointer;
      gap: 4px;
      transition: transform 0.2s;
    }
    .lang-item:hover { transform: translateY(-2px); }
    .flag-small {
      width: 28px;
      height: 20px;
      background-size: cover;
      border-radius: 3px;
      border:1px solid var(--primary-red);
    }
    .lang-code {
      font-size: 11px;
      font-weight: 600;
      color: #4b5563;
    }
    .more-lang-wrap {
      position: relative;
      cursor: pointer;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .more-trigger {
      font-weight: 700;
      font-size: 20px;
      line-height: 1;
    }
    .lang-dropdown {
      position: absolute;
      top: 48px;
      right: 0;
      background: white;
      border-radius: 20px;
      box-shadow: 0 12px 28px rgba(0,0,0,0.12);
      padding: 12px;
      display: none;
      z-index: 300;
      width: 150px;
    }
    .lang-dropdown a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 12px;
      text-decoration: none;
      color: #1e1e2f;
      font-size: 14px;
    }
    .social-links-row {
      display: flex;
      gap: 24px;
      margin-top: 4px;
    }
    .social-icon-text {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 500;
      color: #4a5568;
      transition: color 0.2s;
    }
    .social-icon-text i {
      font-size: 18px;
      color: var(--primary-red);
    }
    .social-icon-text:hover { color: var(--primary-red); }
    .mobile-lang-toggle {
      display: none;
      font-size: 28px;
      cursor: pointer;
      color: #2c3e50;
    }
    .mobile-lang-popup {
      position: fixed;
      top: 80px;
      right: 20px;
      background: white;
      border-radius: 24px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.2);
      padding: 16px;
      z-index: 400;
      display: none;
      width: 160px;
    }
    .mobile-lang-popup a {
      display: block;
      padding: 10px 0;
      text-align: center;
      font-weight: 500;
      text-decoration: none;
      color: #1e1e2f;
    }

    /* ========== NAVIGATION 二级菜单 - hover触发 ========== */
    .nav-bar {
      background: #fff2f2;
      border-bottom: 1px solid var(--border-light);
      /*position: sticky;*/
      top: 0;
      z-index: 200;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .nav-links {
      display: flex;
      list-style: none;
      justify-content: space-between;
      margin: 0;
      padding: 0;
    }
    .nav-links > li {
      flex: 1;
      text-align: center;
      position: relative;
      padding: 16px 0;
    }
    .nav-links > li > a {
      text-decoration: none;
      font-weight: 700;
      color: #2c3e50;
      transition: 0.2s;
      font-size: 15px;
      cursor: pointer;
    }
    .nav-links > li:hover > a { color: var(--primary-red); }
    
    /* 全宽二级菜单 - hover显示 */
    .mega-full {
      position: fixed;
      margin-top: 15px;
      top: auto;
      left: 0;
      width: 100%;
      background: white;
      box-shadow: 0 20px 35px -8px rgba(0,0,0,0.1);
      padding: 24px 0;
      display: none;
      z-index: 150;
      border-top: 3px solid var(--primary-red);
      transform: none;
    }
    .mega-parent:hover .mega-full {
      display: block;
    }
    .mega-inner {
      max-width: 100%;
      margin: 0 auto;
      padding: 0 40px;
      display: flex;
      /*gap: 24px;*/
      justify-content: left;
      flex-wrap: nowrap;
      overflow-x: auto;
      scrollbar-width: thin;
    }
    .mega-col {
      text-align: center;
      flex: 0 0 auto;
      min-width: 140px;
    }
    .mega-col img {
      max-width: 140px;
      max-height: 140px;
      object-fit: cover;
      border-radius: 20px;
      box-shadow: 0 8px 18px rgba(0,0,0,0.08);
      transition: all 0.2s;
    }
    .mega-col p {
      /*margin-top: 10px;*/
      font-weight: 600;
      font-size: 13px;
    }
    @media (max-width: 1200px) {
      .mega-col img { width: 120px; height: 120px; }
      .mega-col { min-width: 120px; }
    }
    @media (max-width: 1000px) {
      .mega-col img { width: 100px; height: 100px; }
      .mega-col { min-width: 100px; }
    }
    
    /* About 二级菜单保持hover */
    .simple-dropdown {
      position: absolute;
      top: 100%;
      left: 0;
      background: white;
      border-radius: 20px;
      box-shadow: 0 12px 28px rgba(0,0,0,0.1);
      padding: 12px 0;
      min-width: 220px;
      display: none;
      z-index: 150;
      text-align: left;
    }
    .has-dropdown:hover .simple-dropdown {
      display: block;
    }
    .simple-dropdown li {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 20px;
      list-style: none;
      cursor: default;
      transition: 0.2s;
    }
    .simple-dropdown li:hover { background: var(--red-light); color: var(--primary-red); }
    .simple-dropdown li i { width: 24px; color: var(--primary-red); }

    /* ========== 左右列布局 ========== */
    .two-cols {
      display: flex;
      gap: 30px;
      margin: 20px 0;
      align-items: stretch;
    }
    .left-cat {
      width: 280px;
      background: var(--gray-bg);
      border-radius: 28px;
      padding: 20px 18px;
      border: 1px solid #edf2f7;
      flex-shrink: 0;
      position: relative;
    }
    .right-content {
      flex: 1;
      background: #ffffff;
      border-radius: 28px;
      border: 1px solid #eef2f8;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      position: relative;
    }
    .cat-title {
      background: #fff2f2;
      border-radius: 8px;
      padding: 8px;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 20px;
      padding-left: 22px;
      border-left: 5px solid var(--primary-red);
      text-align: left;
    }
    .compact-cat-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .cat-item-link {
      background: white;
      padding: 12px 16px;
      border-radius: 60px;
      font-weight: 500;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
      cursor: pointer;
      font-size: 14px;
      text-align: left;
    }
    .cat-item-link:hover {
      background: var(--red-light);
      border-color: var(--primary-red);
      transform: translateX(4px);
      color: var(--primary-red);
    }
    
    /* 三级菜单浮层样式 */
    .floating-submenu {
      background: white;
      border-radius: 24px;
      box-shadow: 0 20px 35px -5px rgba(0,0,0,0.2);
      padding: 24px 32px;
      min-width: 680px;
      z-index: 1000;
      border: 1px solid #eef2f8;
      pointer-events: auto;
    }
    .submenu-title {
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--primary-red);
      font-size: 16px;
      letter-spacing: 1px;
    }
    .three-col-sub {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .three-col-sub ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .three-col-sub li {
      padding: 10px 0;
      font-weight: 500;
      font-size: 14px;
      border-bottom: 1px dashed #edf2f7;
      cursor: default;
      transition: 0.1s;
    }
    .three-col-sub li:hover {
      color: var(--primary-red);
      transform: translateX(4px);
    }
    
        /* 轮播图区域 */
    .carousel-large {
      flex: 1;
      position: relative;
      min-height: 380px;
       /*margin: 20px 20px 24px 20px;*/
      border-radius: 24px;
      overflow: hidden;
    }
    .carousel-slides-lg {
      width: 100%;
      height: 100%;
      position: relative;
    }
    .slide-lg {
      position: absolute;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0;
      transition: opacity 0.6s ease;
      border-radius: 20px;
    }
    .slide-lg.active { opacity: 1; }
    .carousel-caption-lg {
      position: absolute;
      bottom: 20px;
      left: 20px;
      background: rgba(0,0,0,0.6);
      backdrop-filter: blur(6px);
      padding: 10px 20px;
      border-radius: 40px;
      color: white;
    }
    .carousel-arrow-lg {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(0,0,0,0.5);
      color: white;
      border: none;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      cursor: pointer;
      z-index: 10;
    }
    .arrow-left-lg { left: 16px; }
    .arrow-right-lg { right: 16px; }
    
    /* 热销产品无限滚动 */
    .hot-scroll-area {
      width: 100%;
      overflow: hidden;
      position: relative;
      padding: 24px 0;
    }
    .scroll-track-horizontal {
      display: flex;
      flex-direction: column;
      gap: 24px;
      width: max-content;
      animation: scrollNormal 28s linear infinite;
    }
    .hot-row {
      display: flex;
      flex-direction: column;
      flex-wrap: wrap;
      gap: 24px;
      height: 500px;
    }
    .hot-card {
      width: 200px;
      background: #ffffff;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 8px 20px rgba(0,0,0,0.08);
      flex-shrink: 0;
      transition: transform 0.2s;
    }
    .hot-card:hover { transform: translateY(-4px); }
    .hot-img-wrapper {
      position: relative;
    }
    .hot-img-wrapper img {
      width: 100%;
      height: 160px;
      object-fit: cover;
      display: block;
    }
    .badge-tag {
      position: absolute;
      top: 5px;
      right: 5px;
      background: var(--primary-red);
      color: white;
      padding: 4px 10px;
      border-radius: 30px;
      font-size: 11px;
      font-weight: 600;
      z-index: 2;
    }
    .hot-card h5 {
      padding: 14px 14px 6px;
      font-size: 15px;
      font-weight: 700;
    }
    .hot-card p {
      padding: 0 14px 14px;
      color: #5a6874;
      font-size: 12px;
    }
    @keyframes scrollNormal {
      0% { transform: translateX(0); }
      100% { transform: translateX(-50%); }
    }
    .hot-scroll-area:hover .scroll-track-horizontal {
      animation-play-state: paused;
    }
    
    .mobile-product-grid {
      display: none;
      grid-template-columns: repeat(2, 1fr);
      gap: 8px;
      padding: 8px;
    }
    .prod-mobile {
      background: white;
      border-radius: 12px;
      overflow: hidden;
      text-align: center;
      box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    }
    .prod-mobile img {
      width: 100%;
      height: 120px;
      object-fit: cover;
    }
    
    
    /* OEM 资质区域 - 固定宽度200px，隐藏滚动条，按钮滑动 */
    .oem-section { margin: 60px 0; position: relative; }
    .oem-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }
    .oem-controls {
      display: flex;
      gap: 12px;
    }
    .oem-btn {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: white;
      border: 1px solid var(--border-light);
      cursor: pointer;
      transition: 0.2s;
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .oem-btn:hover {
      background: var(--primary-red);
      color: white;
      border-color: var(--primary-red);
    }
    .factory-slider {
      overflow-x: auto;
      scroll-behavior: smooth;
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    .factory-slider::-webkit-scrollbar {
      display: none;
    }
    .factory-grid {
      display: flex;
      gap: 20px;
      width: max-content;
      padding: 4px 0;
    }
    .factory-card {
      cursor: pointer;
      border-radius: 20px;
      overflow: hidden;
      transition: 0.2s;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
      width: 200px;
      flex-shrink: 0;
    }
    .factory-img-wrapper {
      position: relative;
      aspect-ratio: 3 / 4;
    }
    .factory-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .img-label {
      position: absolute;
      bottom: 8px;
      left: 8px;
      background: rgba(227, 27, 35, 0.85);
      color: white;
      padding: 4px 10px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
    }
    .factory-title {
      text-align: center;
      font-weight: 600;
      margin-top: 8px;
      font-size: 13px;
    }
    
    /* About section */
    .about-wrapper {
      display: flex;
      gap: 40px;
      background: #f8fafd;
      border-radius: 32px;
      padding: 24px;
      margin: 50px 0;
    }
    .about-left { flex: 1; }
    .about-left p { margin-bottom: 12px; line-height: 1.5; }
    .more-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary-red);
      font-weight: 600;
      text-decoration: none;
      margin-top: 8px;
    }
    .cert-gallery {
      display: flex;
      gap: 20px;
      margin: 22px 0 0;
      flex-wrap: wrap;
    }
    .cert-item {
      width: calc(25% - 15px);
      position: relative;
      cursor: pointer;
      border-radius: 16px;
      overflow: hidden;
      transition: 0.2s;
    }
    .cert-item img {
      width: 100%;
      aspect-ratio: 3 / 3;
      object-fit: cover;
      display: block;
    }
    .cert-caption {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
      color: white;
      padding: 12px 8px;
      font-size: 13px;
      font-weight: 600;
      text-align: center;
    }
    .about-right {
      flex: 1.3;
      background: #1e1e2f;
      border-radius: 28px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      min-height: 240px;
      position: relative;
      background-size: cover;
      background-position: center;
    }
    .video-placeholder {
      color: white;
      text-align: center;
      background: rgba(0,0,0,0.4);
      padding: 20px;
      border-radius: 60px;
    }
    
    /* Global Projects 一行4个 */
    .cases-four {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin: 15px;
    }
    .case-card {
      background: #fff;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 8px 18px rgba(0,0,0,0.05);
    }
    .case-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .case-card h4 {
      padding: 16px 16px 4px;
      font-size: 18px;
    }
    .case-card p {
      padding: 0 16px 8px;
      color: #5a6874;
      font-size: 13px;
    }
    .case-detail-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin: 0 16px 16px;
      color: var(--primary-red);
      font-weight: 600;
      font-size: 13px;
      text-decoration: none;
    }
    
    /* 右侧竖向浮动社交媒体（可拖动） */
    .vertical-social {
      position: fixed;
      right: 20px;
      bottom: 80px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      padding: 12px 10px;
      border-radius: 40px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      z-index: 99;
      cursor: grab;
      user-select: none;
      transition: none;
    }
    .vertical-social:active {
      cursor: grabbing;
    }
    .vertical-social a {
      color: #2c3e50;
      font-size: 22px;
      transition: 0.2s;
      pointer-events: auto;
    }
    .vertical-social a:hover { color: var(--primary-red); transform: scale(1.1); }
    
    footer {
      background: #0f172a;
      color: #e2e8f0;
      padding: 48px 0 24px;
      margin-top: 50px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1.5fr 1.5fr 2fr;
      gap: 40px;
    }
    .footer-col H4 { margin-bottom:20px}
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 10px; cursor: default; }
    .footer-col .social-icons {
      display: flex;
      gap: 16px;
      margin-top: 12px;
    }
    .footer-col .social-icons a {
      color: #cbd5e1;
      font-size: 20px;
      transition: 0.2s;
    }
    .footer-col .social-icons a:hover {
      color: var(--primary-red);
    }
    
    .footer-col p{
        /*text-transform: lowercase;*/
        margin-bottom: 10px;
        color:#4a5568;
    }
    
    .modal-img {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.85);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      visibility: hidden;
      cursor: pointer;
    }
    .modal-img img {
      max-width: 90%;
      max-height: 90%;
      border-radius: 24px;
    }
    h2{
        color:var(--primary-red); margin:10px;
    }
    .page{
        text-align:center; margin:20px; padding-bottom:10px;
    }
    .page a{
         padding:0px 8px;
    }
    .active{background:var(--red-light)}
    
    
    
    /* product 一行4个 */
    .product-four {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin: 15px;
    }
    
    /* 产品详情区域 - 两列布局 */
    .product-detail-row { display: flex; gap: 40px; margin-bottom: 48px; flex-wrap: wrap; }
    .product-gallery { flex: 1; min-width: 280px; }
    .product-info { flex: 1; min-width: 280px; }
    
    /* 主图区域 - 鼠标放大效果 */
    .main-image-container {
      position: relative;
      width: 100%;
      aspect-ratio: 1 / 1;
      background: #f8f9fc;
      border-radius: 24px;
      overflow: hidden;
      margin-bottom: 20px;
      cursor: crosshair;
      border: 1px solid var(--border-light);
    }
    .main-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
      transform-origin: 0 0;
    }
    .main-image-container.zoomed .main-image {
      transform: scale(2);
      cursor: zoom-out;
    }
    .zoom-lens {
      position: absolute;
      width: 100px;
      height: 100px;
      background: rgba(227, 27, 35, 0.3);
      border: 2px solid var(--primary-red);
      border-radius: 50%;
      pointer-events: none;
      display: none;
      z-index: 10;
    }
    
    /* 多角度图片横向滚动 */
    .thumbnail-section { position: relative; margin-top: 16px; }
    .thumbnail-title { font-size: 14px; font-weight: 600; margin-bottom: 12px; color: #4a5568; }
    .thumbnail-scroll-container {
      position: relative;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .thumbnail-scroll-btn {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: white;
      border: 1px solid var(--border-light);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.2s;
      flex-shrink: 0;
      z-index: 5;
    }
    .thumbnail-scroll-btn:hover { background: var(--primary-red); color: white; border-color: var(--primary-red); }
    .thumbnail-track {
      display: flex;
      gap: 12px;
      overflow-x: auto;
      scroll-behavior: smooth;
      scrollbar-width: none;
      flex: 1;
    }
    .thumbnail-track::-webkit-scrollbar { display: none; }
    .thumbnail-item {
      width: 80px;
      height: 80px;
      flex-shrink: 0;
      border-radius: 16px;
      overflow: hidden;
      cursor: pointer;
      border: 2px solid transparent;
      transition: all 0.2s;
    }
    .thumbnail-item.active { border-color: var(--primary-red); box-shadow: 0 4px 12px rgba(227,27,35,0.3); }
    .thumbnail-item img { width: 100%; height: 100%; object-fit: cover; }
    
    /* 产品信息 */
    .product-title { font-size: 32px; font-weight: 700; color: #1e1e2f; margin-bottom: 12px; }
    .product-subtitle { font-size: 18px; color: var(--primary-red); font-weight: 500; margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border-light); }
    .product-specs { margin-bottom: 24px; }
    .spec-item { display: flex; padding: 12px 0; border-bottom: 1px dashed var(--border-light); }
    .spec-label { width: 100px; font-weight: 600; color: #4a5568; }
    .spec-value { flex: 1; color: #1e1e2f; }
    .product-description { background: var(--gray-bg); padding: 20px; border-radius: 20px; margin-bottom: 24px; line-height: 1.6; color: #4a5568; }
    .action-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
    .btn-primary { background: var(--primary-red); color: white; border: none; padding: 14px 32px; border-radius: 40px; font-weight: 600; cursor: pointer; transition: 0.2s; }
    .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
    .btn-outline { background: transparent; border: 2px solid var(--primary-red); color: var(--primary-red); padding: 14px 32px; border-radius: 40px; font-weight: 600; cursor: pointer; transition: 0.2s; }
    .btn-outline:hover { background: var(--red-light); transform: translateY(-2px); }
    
    /* 产品详情选项卡 */
    .product-details-tab { margin-top: 40px; padding-top: 32px; border-top: 2px solid var(--border-light); }
    .product-details-tab img { width:100%; }
    
    .tab-header { display: flex; gap: 32px; border-bottom: 2px solid var(--border-light); margin-bottom: 24px; }
    .tab-btn { background: none; border: none; padding: 12px 0; font-size: 16px; font-weight: 600; cursor: pointer; color: #6c757d; transition: 0.2s; position: relative; }
    .tab-btn.active { color: var(--primary-red); }
    .tab-btn.active::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 100%; height: 2px; background: var(--primary-red); }
    .tab-content { display: none; padding: 20px 0; line-height: 1.8; color: #4a5568; }
    .tab-content.active { display: block; }
    .spec-table { width: 100%; border-collapse: collapse; }
    .spec-table tr { border-bottom: 1px solid var(--border-light); }
    .spec-table td { padding: 12px 8px; }
    .spec-table td:first-child { width: 160px; font-weight: 600; color: #1e1e2f; }
    
    /* 其他样式 */
    .vertical-social { position: fixed; right: 20px; bottom: 80px; display: flex; flex-direction: column; gap: 12px; background: rgba(255,255,255,0.95); backdrop-filter: blur(8px); padding: 12px 10px; border-radius: 40px; box-shadow: 0 4px 15px rgba(0,0,0,0.1); z-index: 99; cursor: grab; }
    .vertical-social a { color: #2c3e50; font-size: 22px; transition: 0.2s; }
    .vertical-social a:hover { color: var(--primary-red); }
    footer { background: #0f172a; color: #e2e8f0; padding: 48px 0 24px; margin-top: 50px; }
    .footer-grid { display: grid; grid-template-columns: 2fr 1.5fr 1.5fr 2fr; gap: 40px; }
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 10px; cursor: pointer; }
    .modal-img { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.85); display: flex; align-items: center; justify-content: center; z-index: 1000; visibility: hidden; cursor: pointer; }
    .modal-img img { max-width: 90%; max-height: 90%; border-radius: 24px; }
    .mobile-menu-btn { font-size: 28px; cursor: pointer; display: none; }
    
    @media (max-width: 1024px) {
      .container { padding: 0 24px; }
      .two-cols { flex-direction: column; }
      .left-cat { position: static; width: 100%; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .product-detail-row { flex-direction: column; }
    }
    @media (max-width: 768px) {
      /*.logo-text h1{font-size:16px}*/
      .nav-links { display: none; flex-direction: column; position: absolute; background: white; width: 100%; left: 0; padding: 16px; z-index: 250; box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
      .nav-links.show { display: flex; }
      .nav-links > li { flex: auto; text-align: left; padding: 10px 0; }
      .mega-full, .simple-dropdown { display: none; }
      .mega-parent.active .mega-full, .has-dropdown.active .simple-dropdown { display: block; position: static; background: transparent; box-shadow: none; padding-left: 20px; }
      .mobile-menu-btn { display: block !important; }
      .search-lang-row .lang-list { display: none; }
      .mobile-lang-toggle { display: block; }
      .social-links-row { display: none; }
      .vertical-social { right: 8px; bottom: 60px; }
      .about-wrapper{margin:0px;background:none;padding:10px}
      /*.right-content { padding: 20px; }*/
      .product-title { font-size: 24px; }
      .hot-card{width:auto}
      .oem-section{margin:30px 0px}
    }
    
    /* ========== RESPONSIVE ========== */
    @media (max-width: 1024px) {
      .container { padding: 0 24px; }
      .two-cols { flex-direction: column; }
      .cases-four { grid-template-columns: repeat(2,1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .about-wrapper { flex-direction: column; }
      .cert-item { width: calc(50% - 10px); }
    }
    @media (max-width: 768px) {
      .logo-img {max-height：40px;max-width：40px;}    
      .container { padding: 0 12px; }
      .two-cols { gap: 5px; margin: 20px 0; }
      .left-cat { display: none; }
      .right-content { width: 100%; }
      .floating-submenu { display: none !important; }
      .carousel-slides-lg { position: static !important; }
      .slide-lg { position: static !important; display: none; }
      .slide-lg.active { display: block; }
      .carousel-large { margin: 5px; min-height: auto; }
      .carousel-arrow-lg { display: none; }
      .hot-scroll-area { display: none; }
      .product-four {grid-template-columns: repeat(2, 1fr);gap: 16px; margin: 15px;
    }
      .mobile-product-grid { 
        display: grid !important; 
        grid-template-columns: repeat(2, 1fr); 
        gap: 8px; 
        padding: 8px;
      }
      .prod-mobile {
        background: white;
        border-radius: 12px;
        overflow: hidden;
        text-align: center;
        box-shadow: 0 2px 6px rgba(0,0,0,0.05);
      }
      .prod-mobile img { width: 100%; height: 120px; object-fit: cover; }
      .prod-mobile h5 { padding: 8px 4px; font-size: 12px; }
      .right-header { width: auto; }
      .search-lang-row { justify-content: flex-end; width: 100%; gap: 8px; }
      .search-box { display: none; }
      .lang-list { display: none; }
      .mobile-lang-toggle { display: block; }
      .social-links-row { display: none; }
      .
      /* 移动端二级菜单改为点击展开，不显示图片，高度自适应 */
      .mega-full {
        position: static;
        width: 100%;
        box-shadow: none;
        padding: 0;
        margin-top: 5px;
        border-top: none;
        background: transparent;
        display: none;
      }
      .mega-parent.active .mega-full {
        display: block;
      }
      .mega-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 0 0 0 20px;
        overflow: visible;
      }
      .mega-col {
        display: flex;
        align-items: center;
        gap: 10px;
        min-width: auto;
        width: 100%;
      }
      .mega-col img {
        display: none; /* 移动端不显示图片 */
      }
      .mega-col p {
        margin: 0;
        font-size: 14px;
        font-weight: 500;
      }
      .simple-dropdown {
        position: static;
        box-shadow: none;
        padding-left: 20px;
        margin-top: 5px;
        background: transparent;
        display: none;
      }
      .has-dropdown.active .simple-dropdown {
        display: block;
      }
      .case-card{ grid-template-columns: repeat(1,1fr);  }
      .cases-four { grid-template-columns: repeat(1,1fr); gap: 16px; }
      .factory-card { width: 160px; }
      .cert-item { width: calc(50% - 10px); }
      .vertical-social { right: 8px; bottom: 60px; padding: 8px 6px; gap: 8px; }
      .vertical-social a { font-size: 18px; }
      .oem-btn { width: 32px; height: 32px; font-size: 14px; }
      .oem-controls { gap: 6px; }
      .footer-grid { gap: 24px; }
      .footer-col .social-icons { gap: 12px; }
    }