:root {
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.03);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.12);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 8px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', 'Roboto', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            font-size: 16px;
            overflow-x: hidden;
        }
        .container { max-width: 1240px; margin: 0 auto; padding: 0 28px; width: 100%; }
        .container-narrow { max-width: 900px; margin: 0 auto; padding: 0 28px; width: 100%; }
        a { color: #333; text-decoration: none; }
        header {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border);
        }
        .header-inner { display: flex; justify-content: space-between; align-items: center; padding: 14px 0; }
        .logo {
            font-size: 1.45rem; font-weight: 800; color: #0f172a; text-decoration: none;
            display: flex; align-items: center; gap: 9px; letter-spacing: -0.3px;
        }
        .logo-img {
            width: 90px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
            margin: 0 10px; box-shadow: 0 3px 10px rgba(0,0,0,0.1); overflow: hidden;
        }
        .logo-img img { max-width: 100%; max-height: 100%; vertical-align: middle; }
        .nav-menu { display: flex; list-style: none; gap: 10px; align-items: center; }
        .nav-menu > li { position: relative; }
        .nav-menu a {
            text-decoration: none; color: #475569; font-weight: 500; font-size: 0.925rem;
            transition: color var(--transition); display: block; padding: 10px 16px; border-radius: 8px; white-space: nowrap;
        }
        .nav-menu a:hover { color: var(--primary); background: #f8fafc; }
        .nav-cta {
            background: var(--primary) !important; color: #fff !important; padding: 10px 22px !important;
            border-radius: 25px !important; font-weight: 600 !important; font-size: 0.9rem !important;
            transition: all var(--transition) !important; box-shadow: 0 2px 10px rgba(37,99,235,0.25); margin-left: 8px;
        }
        .nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); }
        .arrow-icon { font-size: 1.2rem; margin-left: 6px; display: inline-block; transition: transform 0.2s; cursor: pointer; }
        .dropdown.open > .arrow-icon { transform: rotate(180deg); }
        .dropdown-menu {
            position: absolute; top: 100%; left: 0; background: #fff; border-radius: 12px;
            box-shadow: var(--shadow-lg); border: 1px solid var(--border-light); min-width: 260px;
            padding: 8px 0; opacity: 0; visibility: hidden; transform: translateY(8px);
            transition: all 0.2s; list-style: none; z-index: 200;
        }
        .dropdown-menu li a { padding: 10px 20px; font-size: 0.9rem; color: #334155; font-weight: 500; display: block; }
        .dropdown-menu li a:hover { background: #f1f5f9; color: var(--primary); }
        .hamburger { display: none; flex-direction: column; cursor: pointer; gap: 6px; background: none; border: none; padding: 8px; z-index: 110; }
        .hamburger span { width: 26px; height: 2.5px; background: #0f172a; border-radius: 3px; transition: all 0.3s; transform-origin: center; }
        .hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
        .hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
        .hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

        .breadcrumb { background: var(--surface); border-bottom: 1px solid var(--border-light); padding: 14px 0; font-size: 0.9rem; color: #64748b; }
        .breadcrumb a { color: var(--primary); text-decoration: none; }
        .breadcrumb span { margin: 0 6px; }
        .bg-wh { background: #ffffff; }

        .page-hero {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url(/static/images/trademark-hero.jpg) no-repeat center center/cover;
            color: #fff;
            padding: 100px 0 110px;
            text-align: center;
            position: relative;
            min-height: 425px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-hero h1 { font-size: 2rem; font-weight: 800; margin-bottom: 14px; }
        .page-hero p { font-size: 1.1rem; color: #cbd5e1; max-width: 750px; margin: 0 auto 24px; }
        .btn { display: inline-flex; align-items: center; gap: 6px; padding: 14px 30px; border-radius: 30px; font-weight: 600; text-decoration: none; transition: all var(--transition); font-size: 0.98rem; cursor: pointer; border: none; }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 22px rgba(37,99,235,0.35); }
        .btn-primary:hover { background: #1d4ed8; transform: translateY(-2px); }

        .content-section { padding: 70px 0; }
        .content-section h2 {
            font-size: 1.7rem; font-weight: 700; margin-bottom: 24px; color: #0f172a;
            border-left: 4px solid var(--primary); padding-left: 18px;
        }
        .content-section p, .content-section li { color: var(--text-secondary); font-size: 1rem; margin-bottom: 16px; }
        .content-section ul, .content-section ol { margin-left: 24px; margin-bottom: 20px; }
        .content-section ul li, .content-section ol li { margin-bottom: 8px; }
        .highlight-box {
            background: #eff6ff; border-left: 4px solid var(--primary); padding: 20px 24px;
            border-radius: var(--radius-sm); margin: 28px 0;
        }
        .two-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 20px; }
        .two-columns h3 { font-size:1.2rem; margin-bottom:12px; }
        @media (max-width: 768px) { .two-columns { grid-template-columns: 1fr; } }

        .faq-list { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
        .faq-item { background: #fff; border-radius: var(--radius-sm); border: 1px solid var(--border-light); overflow: hidden; transition: all var(--transition); box-shadow: var(--shadow-sm); }
        .faq-item summary { padding: 18px 24px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; color: #0f172a; }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after { content: '+'; font-size: 1.3rem; color: #94a3b8; }
        .faq-item[open] summary::after { content: '−'; }
        .faq-answer { padding: 0 24px 18px; color: #475569; font-size: 0.93rem; line-height: 1.7; }

        .news-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; margin-top: 20px; }
        .news-card {
            background: #fff; border-radius: var(--radius); overflow: hidden;
            border: 1px solid var(--border-light); box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .news-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
        .news-card .news-image {
            width: 100%;
            height: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .news-card .news-image img {
            width: 100%;
            height: 100%;
            object-fit: contain;
            object-position: center;
            display: block;
        }
        .news-card .news-body { padding: 10px; }
        .news-card .news-date { font-size: 0.8rem; color: #94a3b8; margin-bottom: 6px; }
        .news-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
        .news-card p { color: #475569; font-size: 0.92rem; margin-bottom: 14px; }

        .cta-banner {
            background: linear-gradient(135deg, #2563eb, #1e40af); color: #fff; text-align: center;
            padding: 60px 28px; border-radius: 20px; margin: 60px 0;
        }
        .cta-banner h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .cta-banner p { margin-bottom: 24px; opacity: 0.9; font-size: 1.05rem; }
        .btn-white { background: #fff; color: #2563eb; font-weight: 700; }

        .section-title { text-align: center; margin-bottom: 50px; }
        .section-title h2 { font-size: 2.2rem; font-weight: 800; color: #0f172a; margin-bottom: 12px; letter-spacing: -0.4px; }
        .section-title p { color: #64748b; font-size: 1.08rem; max-width: 620px; margin: 0 auto; }
        .contact-form-section { background: #ffffff; padding: 80px 0; }
        .contact-container {
            display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
            background: var(--surface); border-radius: var(--radius);
            box-shadow: var(--shadow-lg); overflow: hidden;
            border: 1px solid var(--border-light);
        }
        .contact-info { background: linear-gradient(145deg, #f8fafc 0%, #ffffff 100%); padding: 44px 36px; }
        .contact-info h3 { font-size: 1.8rem; font-weight: 700; margin-bottom: 18px; }
        .contact-info p { color: #475569; margin-bottom: 30px; }
        .contact-details { list-style: none; margin-top: 28px; }
        .contact-details li {
            display: flex; align-items: center; gap: 14px;
            margin-bottom: 15px; font-size: 0.96rem;
        }
        .contact-details li i {
            width: 36px; height: 36px; background: #eff6ff;
            display: inline-flex; align-items: center; justify-content: center;
            border-radius: 50%; color: var(--primary); font-size: 1.1rem;
            flex-shrink: 0;
        }
        .contact-form { padding: 44px 36px; background: #fff; }
        .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .form-group { margin-bottom: 20px; }
        .contact-form input,
        .contact-form textarea {
            width: 100%; padding: 14px 18px;
            border: 1px solid var(--border); border-radius: var(--radius-xs);
            font-size: 0.95rem; font-family: inherit; transition: all 0.2s;
        }
        .contact-form input:focus,
        .contact-form textarea:focus {
            outline: none; border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        .message-btn { text-align: center; display: flex; gap: 16px; justify-content: center; }
        .verification-row { display: flex; flex-wrap: nowrap; gap: 16px; align-items: center; margin-bottom: 20px; }
        .verification-row .form-group:first-child { flex: 7; margin-bottom: 0; }
        .verification-row .form-group:last-child { flex: 3; margin-bottom: 0; min-width: 0; }
        .verification-code-img {
            cursor: pointer; width: 100%; max-width: 120px;
            height: auto; max-height: 48px; object-fit: contain;
            border-radius: 6px; border: 1px solid #e2e8f0;
        }
        .btn-outline-secondary {
            background: #f1f5f9;
            color: #334155;
            border: 1px solid #e2e8f0;
        }
        .btn-outline-secondary:hover { background: #e6edf5; transform: translateY(-1px); }

        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all 0.3s ease;
            box-shadow: var(--shadow-lg);
            z-index: 999;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl);
        }

        @media (max-width: 520px) {
            .verification-code-img { max-width: 100%; }
            .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; font-size: 1rem; }
        }
        footer { background: #0b1120; color: #cbd5e1; padding: 56px 0 28px; margin-top: 60px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        footer h4 { color: #f1f5f9; margin-bottom: 18px; font-weight: 700; font-size: 0.95rem; /* text-transform: uppercase; */ }
        footer ul { list-style: none; } footer ul li { margin-bottom: 9px; }
        footer a { color: #94a3b8; text-decoration: none; transition: color var(--transition); font-size: 0.9rem; }
        footer a:hover { color: #fff; }
        .footer-bottom { border-top: 1px solid #1e293b; padding-top: 20px; text-align: center; font-size: 0.85rem; color: #64748b; }

        @media (max-width: 1100px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
                position: absolute; top: 100%; left: 0; right: 0;
                background: #fff; box-shadow: var(--shadow-xl);
                flex-direction: column; padding: 20px 24px 28px;
                max-height: 80vh; overflow-y: auto;
                border-bottom: 1px solid var(--border);
                border-radius: 0 0 16px 16px;
            }
            .nav-menu.show { display: flex; }
            .nav-menu > li { width: 100%; border-bottom: 1px solid #f1f5f9; }
            .nav-menu a {
                padding: 14px 8px; font-size: 1rem; font-weight: 600;
                color: #0f172a; white-space: normal;
                display: flex; justify-content: space-between; align-items: center;
            }
            .nav-menu .arrow-icon {
                margin-left: auto; font-size: 1.5rem; padding: 4px 8px;
                background: #f1f5f9; border-radius: 6px; transition: all 0.25s;
            }
            .dropdown.open > .arrow-icon { background: #e0e7ff; color: var(--primary); }
            .dropdown-menu {
                position: static; box-shadow: none; opacity: 1; visibility: visible;
                max-height: 0; overflow: hidden; transition: max-height 0.35s;
                padding: 0 0 0 20px; background: #f8fafc; border-radius: 8px;
            }
            .dropdown.open > .dropdown-menu { max-height: 400px; padding: 8px 0 8px 20px; }
            .dropdown-menu li a { padding: 12px 18px; font-size: 0.95rem; }
            .hamburger { display: flex; }
            .page-hero h1 { font-size: 1.8rem; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .contact-container { grid-template-columns: 1fr; }
            .contact-info, .contact-form { padding: 32px 24px; }
            .form-row:not(.verification-row) { grid-template-columns: 1fr; gap: 0; }
            .verification-row { gap: 12px; }
        }
        @media (min-width: 1025px) {
            .nav-menu a { font-size: 0.85rem; padding: 8px 14px; }
            .nav-cta { padding: 8px 18px !important; font-size: 0.85rem !important; }
            .dropdown:hover > .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
        }
        @media (max-width: 768px) {
            .container, .container-narrow { padding: 10px; }
            .footer-grid { grid-template-columns: 1fr; }
            .page-hero { padding: 50px 0 60px; }
            .page-hero h1 { font-size: 1.8rem; }
            .content-section h2 { font-size: 1.5rem; }
            .back-to-top { bottom: 16px; right: 16px; width: 42px; height: 42px; }
        }