    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "Microsoft Yahei", "PingFang SC", "Arial", sans-serif; /* Ôö¼ÓArialÊÊÅäGoogle×ÖÌåäÖÈ¾ */
            color: #333;
            line-height: 1.6;
            scroll-behavior: smooth; 
        }

        .navbar {
            background-color: #fff;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            padding: 1rem 0;
            transition: all 0.3s ease; 
            z-index: 9999;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            color: #2c3e50 !important;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-img {
            height: 60px;
            width: auto;
            object-fit: contain;
        }
        .navbar-brand span {
            color: #e74c3c;
        }
        .nav-link {
            color: #333 !important;
            font-weight: 500;
            margin: 0 0.8rem;
            position: relative;
            transition: all 0.3s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #e74c3c;
            transition: width 0.3s ease;
        }
        .nav-link:hover {
            color: #e74c3c !important;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .lang-switch {
            margin-left: 1rem;
            padding: 0.5rem 1rem;
            background-color: #0d6efd;
            color: #fff !important;
            border-radius: 6px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        .lang-switch:hover {
            background-color: #0a58ca;
            color: #fff !important;
        }
        .lang-switch::after {
            display: none; 
        }
        @media (max-width: 768px) {
            .lang-switch {
                margin-left: 0;
                margin-top: 1rem;
                display: inline-block;
                width: fit-content;
            }
        }

        .hero {
            background: linear-gradient(rgba(0,0,0,0.2), rgba(0,0,0,0.2));
            background-size: cover;
            height: 80vh;
            min-height: 500px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            text-align: center;
            padding: 0 1rem;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(13, 110, 253, 0.7) 0%, rgba(10, 88, 202, 0.7) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero h1 {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
            margin-bottom: 1rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .hero p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            margin-bottom: 2rem;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero .btn {
            padding: 0.8rem 2rem;
            font-size: 1.1rem;
            background-color: #e74c3c;
            border: none;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
        }
        .hero .btn:hover {
            background-color: #c0392b;
            transform: translateY(-3px);
            box-shadow: 0 6px 18px rgba(0,0,0,0.25);
        }

        .company-intro {
            padding: 4rem 0;
            background: #fff;
        }
        .company-intro .content {
            max-width: 1000px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.8;
            color: #333;
            text-align: justify;
            padding: 0 1rem;
        }
        .company-intro h2 {
            text-align: center;
            margin-bottom: 2rem;
            font-weight: 700;
            color: #2c3e50;
            position: relative;
        }
        .company-intro h2::after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background-color: #e74c3c;
            margin: 10px auto 0;
        }

        .strength {
            padding: 4rem 0;
            background-color: #f8f9fa;
        }
        .strength h2 {
            text-align: center;
            margin-bottom: 3rem;
            font-weight: 700;
            color: #2c3e50;
            position: relative;
        }
        .strength h2::after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background-color: #e74c3c;
            margin: 10px auto 0;
        }
        .strength-item {
            background-color: #fff;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            margin-bottom: 2rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .strength-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.12);
        }
        .strength-item h4 {
            color: #e74c3c;
            margin-bottom: 1.5rem;
            font-weight: 600;
            display: flex;
            align-items: center;
        }
        .strength-item h4 i {
            margin-right: 0.8rem;
            font-size: 1.5rem;
        }
        .strength-item ul {
            padding-left: 1.5rem;
        }
        .strength-item li {
            margin-bottom: 0.8rem;
            line-height: 1.7;
        }

        .quality-assurance {
            padding: 5rem 0;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }
        .quality-assurance h2 {
            text-align: center;
            margin-bottom: 3rem;
            font-weight: 700;
            color: #2c3e50;
            position: relative;
        }
        .quality-assurance h2::after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background-color: #e74c3c;
            margin: 10px auto 0;
        }
        .quality-card {
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.08);
            padding: 2.5rem 2rem;
            margin-bottom: 2rem;
            transition: all 0.4s ease;
            border-left: 5px solid #0d6efd;
        }
        .quality-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.12);
            border-left-color: #e74c3c;
        }
        .quality-card h4 {
            color: #2c3e50;
            font-weight: 700;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
        }
        .quality-card h4 i {
            font-size: 1.8rem;
            color: #0d6efd;
            margin-right: 1rem;
        }
        .quality-card p {
            line-height: 1.8;
            color: #555;
            margin-bottom: 1rem;
        }
        .quality-card ul {
            padding-left: 1.8rem;
        }
        .quality-card li {
            margin-bottom: 0.8rem;
            color: #666;
        }
        .certification-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2rem;
            margin-top: 3rem;
            padding: 2rem 0;
        }
        .cert-badge {
            text-align: center;
            max-width: 150px;

        }
        .cert-badge img {
            height: 80px;
            width: auto;
            margin-bottom: 1rem;
            filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
        }
        .cert-badge p {
            font-weight: 500;
            color: #2c3e50;
            font-size: 0.95rem;
        }

        .products {
            padding: 5rem 0;
        }
        .products h2 {
            text-align: center;
            margin-bottom: 3rem;
            font-weight: 700;
            color: #2c3e50;
            position: relative;
        }
        .products h2::after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background-color: #e74c3c;
            margin: 10px auto 0;
        }
        .product-card {
            border: none;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            border-radius: 8px;
            overflow: hidden;
            margin-bottom: 2rem;
            transition: all 0.3s ease;
            height: 100%; 
            display: flex;
            flex-direction: column;
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.12);
        }
        .product-card img {
            height: 200px;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        .product-card:hover img {
            transform: scale(1.05);
        }
        .product-card .card-body {
            padding: 1.5rem;
            flex: 1; 
            display: flex;
            flex-direction: column;
        }
        .product-card h5 {
            font-weight: 600;
            margin-bottom: 1rem;
            color: #2c3e50;
        }
        .product-card .card-text {
            flex: 1; 
            margin-bottom: 1rem;
        }
        .product-card .btn {
            align-self: flex-start; 
        }

        .support {
            padding: 4rem 0;
            background-color: #f8f9fa;
        }
        .support h2 {
            text-align: center;
            margin-bottom: 2rem;
            font-weight: 700;
            color: #2c3e50;
            position: relative;
        }
        .support h2::after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background-color: #e74c3c;
            margin: 10px auto 0;
        }
        .support-desc {
            background-color: #fff;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            max-width: 1000px;
            margin: 0 auto;
            line-height: 1.8;
            font-size: 1.05rem;
            padding: 2rem 1.5rem;
        }

        #contact {
            padding: 5rem 0;
            background-color: #f9fafb;
        }
        #contact h2, #contact h3 {
            position: relative;
        }
        #contact h2::after, #contact h3::after {
            content: '';
            display: block;
            width: 60px;
            height: 2px;
            background-color: #0d6efd;
            margin: 10px auto 0;
        }
        #contact h3::after {
            margin: 10px 0 0;
        }
        .form-control:focus {
            border-color: #0d6efd;
            box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
        }

        footer {
            background-color: #2c3e50;
            color: #fff;
            padding: 3rem 0 1rem;
        }
        .footer-logo {
            height: 80px; 
            width: auto;
            margin-bottom: 15px;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            margin-right: 1rem;
            transition: color 0.3s;
            display: inline-block; 
            padding: 0.2rem 0;
        }
        .footer-links a:hover {
            color: #e74c3c;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        .trust-badge { 
            display:inline-block; 
            margin:0 10px; 
            font-size:0.9rem; 
            color:#fff; 
        }
        .trust-badge i { 
            color:#e74c3c; 
            margin-right:5px; 
        }
        .footer-lang-link {
            color: #fff !important;
            background-color: #e74c3c;
            padding: 0.3rem 0.8rem;
            border-radius: 4px;
            margin-top: 1rem;
            display: inline-block;
        }
        .footer-lang-link:hover {
            background-color: #c0392b;
            color: #fff !important;
        }

        @media (max-width: 768px) {
            .navbar-nav {
                text-align: center;
                margin-top: 1rem;
            }
            .nav-link {
                margin: 0.5rem 0;
            }
            .logo-img {
                height: 40px;
            }
            .hero {
                height: 70vh;
            }
            .strength-item {
                padding: 1.5rem;
            }
            .trust-badge { 
                display:block; 
                margin:10px 0; 
            }
            .product-card img {
                height: 160px; 
            }
            #contact {
                padding: 3rem 0;
            }
            #contact .col-lg-6 {
                padding: 0 1rem;
            }
            footer .col-md-6 {
                margin-bottom: 2rem;
            }
            .quality-card {
                padding: 1.5rem 1rem;
            }
            .certification-badges {
                gap: 1rem;
            }
            .cert-badge img {
                height: 60px;
            }
        }

        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 45px;
            height: 45px;
            background-color: #e74c3c;
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: all 0.3s ease;
            opacity: 0;
            visibility: hidden;
            z-index: 999;
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #c0392b;
            transform: translateY(-3px);
        }
  .trust-badge {
    display: inline-block;
    margin-right: 15px;
    padding: 5px 10px;
    background-color: #999999;
    border-radius: 4px;
  }
  .btn-container {
    margin-top: 30px !important; 
    margin-bottom: 0;
  }
  .en-link {
    margin-top: 15px;
  }

    </style>