:root {
            --my-blue: #0A68FF; --my-yellow: #FFC900; --my-dark: #1D2129; --my-text: #4E5969; --my-light-gray: #F7F8FA; --my-border-color: #E5E6EB;
            --bs-body-font-family: var(--font-family-body);
            --bs-primary: var(--my-blue); --bs-primary-rgb: 10, 104, 255; --bs-warning: var(--my-yellow);
            --bs-body-color: var(--my-text); --bs-body-bg: #FFFFFF; --bs-link-hover-decoration: none;
            --fengrui-primary-blue: #0A2540;
            --fengrui-accent-yellow: #FFB800;
        }
        body { font-weight: 400; scroll-behavior: smooth; }
        a, .btn, .nav-link, .navbar-brand { transition: all 0.3s ease; }
        .navbar { padding: 1rem; transition: background-color 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease; }
        .navbar-transparent { background-color: transparent; }
        .navbar-scrolled { background-color: rgba(255, 255, 255, 0.85); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); padding-top: 0.5rem; padding-bottom: 0.5rem; }
        .navbar .navbar-nav .nav-link { color: #ffffff !important; }
        .navbar-scrolled .navbar-nav .nav-link { color: var(--my-dark) !important; }
        .navbar-scrolled .navbar-nav .nav-link:hover { color: var(--my-blue) !important; }
        .navbar-scrolled #brand-logo-text { color: var(--my-dark) !important; }
        .navbar-brand img { 
    transition: filter 0.4s ease; 
    width: 240px !important; 
    height: 45px !important; 
    object-fit: contain; 
}
        /* .navbar-scrolled .navbar-brand img { filter: invert(1) brightness(0.5) sepia(1) hue-rotate(190deg) saturate(5); } */
/* 移除LOGO滤镜效果，保持原始颜色 */
        .navbar .nav-link { font-size: 1rem; font-weight: 500; padding: 0.5rem 1rem !important; position: relative; }
        .navbar .nav-link::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background-color: var(--my-blue); transition: width 0.3s ease; }
        .navbar .nav-link:hover::after, .navbar .nav-link.active::after { width: 50%; }
        .navbar .nav-link.active { color: var(--my-yellow) !important; font-weight: 700; }
        .navbar-scrolled .nav-link.active { color: var(--my-yellow) !important; }
        .navbar-toggler { border: none !important; }
        .navbar-toggler:focus { box-shadow: none !important; }
        .navbar-toggler .bi-list { font-size: 2rem; color: #fff; transition: color 0.4s ease; }
        .navbar-scrolled .navbar-toggler .bi-list { color: var(--my-dark); }
        
        .dropdown { position: relative; }
        
        /* 下拉菜单样式 */
        .dropdown-menu { 
            background-color: rgba(255, 255, 255, 0.95); 
            backdrop-filter: blur(10px); 
            border: 1px solid var(--my-border-color); 
            border-radius: 8px; 
            box-shadow: 0 8px 25px rgba(0,0,0,0.15); 
            margin-top: 0; display: none; position: absolute;
            top: 100%; left: 0; z-index: 1000; min-width: 200px;
        }
        .dropdown:hover .dropdown-menu { display: block; }
        .dropdown-menu:hover { display: block; }
        .dropdown::before {
            content: ''; position: absolute; top: 100%; left: 0; right: 0;
            height: 10px; background: transparent; z-index: 999;
        }
        .dropdown:hover::before { display: block; }
        .dropdown-item { 
            color: var(--my-dark); font-weight: 500; padding: 0.75rem 1.5rem; 
            transition: all 0.3s ease; display: block; width: 100%; clear: both;
            text-align: inherit; white-space: nowrap; background-color: transparent; border: 0;
        }
        .dropdown-item:hover, .dropdown-item:focus { 
            background-color: var(--my-light-gray); color: var(--my-blue); text-decoration: none;
        }
        .dropdown-toggle::after { display: none; }
        
        .mobile-bottom-nav { 
            background-color: #fff; 
            padding: 0.75rem 1rem; 
            border-top: 1px solid var(--my-border-color); 
            box-shadow: 0 -4px 12px rgba(0,0,0,0.05); 
            z-index: 1050; 
        }
        .mobile-bottom-nav .btn { font-weight: 700; border-radius: 50px; padding: 0.75rem 1.25rem; }
        .mobile-bottom-nav .btn-warning { background-color: var(--my-yellow); color: var(--my-dark); border: none; }
        
        #first-screen-wrapper { height: 92svh; display: flex; flex-direction: column; background-color: #0d2c54; }
        @media (min-width: 992px) { #first-screen-wrapper { height: 100vh; } }
        #heroCarousel { flex-grow: 1; height: 0; position: relative; }
        #heroCarousel, .carousel-inner, .carousel-item { height: 100%; }
        #heroCarousel .carousel-item img, #heroCarousel .carousel-item video { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; filter: brightness(0.7); }
        #heroCarousel .carousel-caption { position: absolute; bottom: 15%; left: 10%; right: auto; text-align: left; width: 80%; max-width: 700px; padding: 2rem; background: rgba(0, 0, 0, 0.2); border-radius: 8px; backdrop-filter: blur(5px); }
        #heroCarousel .carousel-caption h5 { font-size: clamp(1.8rem, 5vw, 3rem); font-weight: 700; }
        #heroCarousel .carousel-caption p { font-size: clamp(1rem, 2vw, 1.2rem); font-weight: 300; margin-top: 1rem; }
        .carousel-indicators { bottom: 20px; }
        .carousel-indicators [data-bs-target] { width: 30px; height: 4px; border-radius: 2px; background-color: rgba(255, 255, 255, 0.5); opacity: 1; border: 0; margin: 0 5px; }
        .carousel-indicators .active { background-color: var(--my-blue); }
        .carousel-control-prev-icon, .carousel-control-next-icon { width: 3rem; height: 3rem; background-size: 60% 60%; background-color: rgba(255, 255, 255, 0.1); border-radius: 50%; }
        #slogan-banner { background-color: #0d2c54; padding: 1rem 0; flex-shrink: 0; }
        .slogan-text { font-family: 'Ma Shan Zheng', cursive; color: #fff; font-size: clamp(2rem, 4vw + 1rem, 3.5rem); font-weight: normal; letter-spacing: 0.15em; text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3); }
        
        @media (max-width: 991.98px) {
            .navbar-brand-centered { position: absolute; left: 50%; transform: translateX(-50%); }
            .navbar .nav-link.active::after, .navbar .nav-link:hover::after { width: 0; }
            #heroCarousel .carousel-item { min-height: auto; }
            
            .offcanvas { 
                background-color: #FFFFFF; 
                /* 【已修改】调整抽屉宽度，使其变窄 */
                --bs-offcanvas-width: clamp(260px, 75vw, 260px); 
                --bs-offcanvas-transition: transform .4s ease-in-out; 
            }

            .offcanvas-header { border-bottom: 1px solid var(--my-border-color); padding: 1rem 1.5rem; }
            .offcanvas-title { color: var(--my-dark); font-weight: 500; font-size: 1.1rem; }
            .offcanvas-header .btn-close { background-image: var(--bs-btn-close-bg); }
            
            .offcanvas-body { 
                padding: 0 !important; 
                display: flex; 
                flex-direction: column; 
                overflow: hidden;
                padding-bottom: 3rem !important;
            }

            .offcanvas .navbar-nav { padding: 2rem 1.5rem; flex-grow: 1; overflow-y: auto; -ms-overflow-style: none; scrollbar-width: none; }
            .offcanvas .navbar-nav::-webkit-scrollbar { display: none; }
            .offcanvas-footer-info { margin-top: auto; padding: 1.5rem; border-top: 1px solid var(--my-border-color); flex-shrink: 0; text-align: center; }
            .offcanvas .nav-item { margin-bottom: 2rem; }
            .offcanvas .nav-link { color: var(--my-dark) !important; font-size: 1.5rem; font-weight: 500; padding: 0.5rem 0 !important; position: relative; display: inline-block; width: auto; }
            .offcanvas .nav-link::after { content: ''; position: absolute; bottom: -8px; left: 0; transform: none; width: 0; height: 2px; background-color: var(--my-blue); transition: width 0.3s ease; }
            .offcanvas .nav-link:hover::after, .offcanvas .nav-link.active::after { width: 40px; }
            .offcanvas .nav-link.active { color: var(--my-yellow) !important; font-weight: 700; }
            
            /* 移动端子菜单样式 */
            .offcanvas .submenu { 
                list-style: none; padding-left: 0; margin-top: 1rem; margin-bottom: 1rem; 
                max-height: 0; overflow: hidden; transition: max-height 0.3s ease-out;
            }
            .offcanvas .submenu.show { max-height: 300px; transition: max-height 0.3s ease-in; }
            .offcanvas .submenu li { margin-bottom: 1rem; }
            .offcanvas .submenu-link { 
                font-size: 1.2rem !important; color: var(--my-text) !important; 
                font-weight: 400 !important; padding-left: 1.5rem !important; position: relative; 
            }
            .offcanvas .submenu-link::before { 
                content: '•'; position: absolute; left: 0.5rem; color: var(--my-blue); font-weight: bold; 
            }
            .offcanvas .submenu-link:hover, .offcanvas .submenu-link.active { color: var(--my-blue) !important; }
            .offcanvas .nav-link .bi-chevron-down {
                font-size: 1.3rem; margin-left: 0.5rem; color: var(--my-blue);
                opacity: 0.8; transition: transform 0.3s ease;
            }
            .offcanvas .mobile-dropdown-toggle.active .bi-chevron-down { transform: rotate(180deg); }
            .offcanvas .mobile-dropdown-toggle { cursor: pointer; }
            
            .offcanvas-footer-info .contact-item { display: flex; align-items: center; justify-content: center; gap: 0.75rem; font-size: 0.9rem; color: var(--my-text); margin-bottom: 0.8rem; }
            .offcanvas-footer-info .company-name { 
                color: var(--fengrui-primary-blue); font-weight: 400; border-top: 1px solid var(--my-border-color); 
                margin-top: 0.75rem; padding-top: 0.3rem; font-size: 0.85rem; text-align: center; letter-spacing: 0.3px;
                background: linear-gradient(135deg, var(--fengrui-primary-blue), var(--my-blue));
                -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
            }
            .offcanvas-footer-info .contact-item.address-item { align-items: flex-start; }
            #back-to-top-btn { bottom: 100px; } 
        }
        main { font-family: 'Inter', sans-serif; color: #6c757d; }
        main h1, main h2, main h3, main h4, main h5, main h6 { font-family: 'Orbitron', sans-serif; color: #343a40; }
        main .section-title h2 { font-size: 2.5rem; position: relative; display: inline-block; padding-bottom: 15px; }
        main .section-title h2::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 80px; height: 4px; background-color: var(--fengrui-accent-yellow); border-radius: 2px; }
        main .section-title p { max-width: 600px; margin: 15px auto 0; }
        main .btn-custom { padding: 12px 30px; font-family: 'Inter', sans-serif; font-weight: 700; font-size: 1rem; border-radius: 50px; text-transform: uppercase; letter-spacing: 1px; transition: all 0.3s ease; }
        main .btn-primary-custom { background-color: var(--fengrui-accent-yellow); color: var(--fengrui-primary-blue); border: 2px solid var(--fengrui-accent-yellow); }
        main .btn-primary-custom:hover { background-color: transparent; color: var(--fengrui-accent-yellow); border-color: var(--fengrui-accent-yellow); transform: translateY(-3px); }
        main .feature-box { text-align: center; padding: 30px; background: #fff; border-radius: 15px; box-shadow: 0 5px 25px rgba(10, 37, 64, 0.08); transition: transform 0.3s ease, box-shadow 0.3s ease; margin-bottom: 30px; min-height: 250px; }
        main .feature-box:hover { transform: translateY(-10px); box-shadow: 0 15px 35px rgba(10, 37, 64, 0.12); }
        main .feature-box .icon { font-size: 3rem; color: var(--fengrui-accent-yellow); }
        main .feature-box h4 { font-size: 1.4rem; }
        main #products, main #contact { background-color: #f8f9fa; }
        main .contact-form .form-control { border-radius: 8px; border: 1px solid #ced4da; padding: 12px 15px; transition: border-color 0.3s, box-shadow 0.3s; }
        main .contact-form .form-control:focus { border-color: var(--fengrui-accent-yellow); box-shadow: 0 0 0 0.25rem rgba(255, 184, 0, 0.25); }
        main .contact-info-icon { font-size: 1.5rem; color: var(--fengrui-accent-yellow); width: 30px; }
        .text-brand-red { color: #c02327; }
        .filter-nav-large { gap: 10px; }
        .filter-btn { border: 1px solid #ddd; background-color: #fff; color: #333; padding: 8px 20px; text-decoration: none; border-radius: 4px; transition: all 0.2s ease-in-out; white-space: nowrap; }
        .filter-btn:hover { background-color: #f8f9fa; border-color: #bbb; color: #333; }
        .filter-btn.active, .product-filter .dropdown-item.active, .product-filter .dropdown-item:active { background-color: #c02327; border-color: #c02327; color: #fff !important; }
        .product-item { text-align: center; transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out; border-radius: 4px; padding-bottom: 1rem; }
        .product-item:hover { transform: scale(1.05); box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); z-index: 10; background-color: #fff; }
        .product-item .product-image-container { position: relative; display: block; overflow: hidden; border-radius: 4px; background-color: #f8f9fa; }
        .product-item .product-image-container img { width: 100%; height: auto; display: block; transition: transform 0.3s ease; }
        .product-item .product-info { padding-top: 0.3rem; margin-top: 1rem; border-top: 1px solid var(--fengrui-accent-yellow); }
        .product-item .product-info .product-code { font-weight: 500; margin-bottom: 0.25rem; color: #c02327; }
        .product-item .product-info .product-desc { color: #333; font-size: 0.9rem; }
        #product-tooltip { position: fixed; display: none; padding: 8px 12px; background-color: rgba(0, 0, 0, 0.8); color: #fff; border-radius: 4px; font-size: 0.9rem; z-index: 9999; pointer-events: none; white-space: nowrap; }
        .new-footer { background-color: var(--fengrui-primary-blue); color: rgba(255, 255, 255, 0.7); padding: 3rem 0; font-size: 0.9rem; }
        .new-footer h3, .new-footer h4 { color: #fff; font-family: 'Noto Sans SC', sans-serif; font-weight: 500; }
        .new-footer a { color: rgba(255, 255, 255, 0.7); text-decoration: none; transition: color 0.3s ease; }
        .new-footer a:hover { color: var(--my-yellow); }
        .new-footer .list-unstyled li { margin-bottom: 0.5rem; }
        .new-footer .small { color: rgba(255, 255, 255, 0.7); }
        .new-footer hr { border-color: rgba(255, 255, 255, 0.15); }
        #back-to-top-btn { position: fixed; bottom: 25px; right: 25px; width: 50px; height: 50px; background-color: var(--fengrui-accent-yellow); color: var(--fengrui-primary-blue); border: none; border-radius: 50%; font-size: 1.5rem; display: none; align-items: center; justify-content: center; cursor: pointer; z-index: 1080; opacity: 0; visibility: hidden; transform: translateY(20px); transition: all 0.3s ease; box-shadow: 0 4px 10px rgba(0,0,0,0.2); }
        #back-to-top-btn.show { display: flex; opacity: 1; visibility: visible; transform: translateY(0); }
        #back-to-top-btn:hover { background-color: var(--fengrui-primary-blue); color: var(--fengrui-accent-yellow); }
        @media (max-width: 991.98px) { #back-to-top-btn { bottom: 100px; } }

        /* 微信二维码弹窗样式 */
        #wechatModal .modal-content {
          background: rgba(255, 255, 255, 0.7); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
          border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 24px;
          box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15); overflow: hidden;
        }
        #wechatModal .modal-header {
          border-bottom: none; padding: 1.5rem 1.5rem 0; display: flex; flex-direction: column;
          align-items: center; position: relative;
        }
        #wechatModal .wechat-icon { font-size: 2.5rem; color: #07c160; margin-bottom: 0.75rem; }
        #wechatModal .modal-title { font-size: 1.1rem; font-weight: 600; color: var(--fengrui-primary-blue); text-align: center; width: 100%; margin: 0; }
        #wechatModal .btn-close {
          position: absolute; top: 1rem; right: 1rem; background-color: rgba(0, 0, 0, 0.2);
          border-radius: 50%; width: 36px; height: 36px; opacity: 0.9;
          transition: all 0.3s ease; filter: invert(1) grayscale(100%) brightness(200%);
        }
        #wechatModal .btn-close:hover { background-color: rgba(0, 0, 0, 0.35); opacity: 1; transform: rotate(90deg); }
        #wechatModal .modal-body { padding: 1rem 2rem 2.5rem; text-align: center; }
        #wechatModal .qr-container {
          position: relative; display: inline-block; padding: 8px; border-radius: 20px;
          margin-bottom: 1.5rem; background: linear-gradient(145deg, rgba(255,255,255,0.6), rgba(255,255,255,0.2));
          box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        #wechatModal .qr-container::before {
          content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
          border-radius: 20px; border: 2px solid transparent;
          background: conic-gradient(from 180deg at 50% 50%, #07c160, var(--my-blue), #07c160) border-box;
          -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
          -webkit-mask-composite: destination-out; mask-composite: exclude;
          animation: spin 3s linear infinite;
        }
        @keyframes spin { to { transform: rotate(1turn); } }
        #wechatModal .qr-placeholder {
          width: 180px; height: 180px; border-radius: 14px;
          overflow: hidden; position: relative; cursor: pointer; background-color: white; 
        }
        #wechatModal .qr-placeholder::after {
          content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
          background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
          transition: left 0.6s ease;
        }
        #wechatModal .qr-placeholder:hover::after { left: 100%; }
        #wechatModal .qr-code-img { width: 100%; height: 100%; object-fit: contain; border-radius: 12px; }
        #wechatModal .scan-instruction { font-size: 0.95rem; color: #2c3e50; margin-bottom: 0.25rem; font-weight: 500; }
        #wechatModal .contact-info { font-size: 1rem; font-weight: 600; color: #07c160; margin: 0; letter-spacing: 1px; user-select: all; }
        #wechatModal.fade .modal-dialog {
          transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease-out;
          transform: translateY(-40px) scale(0.95); opacity: 0;
        }
        #wechatModal.show .modal-dialog { transform: translateY(0) scale(1); opacity: 1; }
        @media (max-width: 480px) {
          #wechatModal .modal-dialog { margin: 1rem; max-width: calc(100vw - 2rem); }
          #wechatModal .modal-body { padding: 0.75rem 1rem 1.5rem; }
          #wechatModal .qr-placeholder { width: 150px; height: 150px; }
        }