:root {
            --primary: #4361ee;
            --primary-dark: #3a56d4;
            --secondary: #3f37c9;
            --accent: #4895ef;
            --light: #f8f9fa;
            --dark: #212529;
            --text: #333;
            --text-light: #6c757d;
            --success: #4cc9f0;
            --warning: #ff9e00;
            --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', 'Noto Sans SC', sans-serif;
        }

        body {
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
            background-color: #f8f9ff;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Styles */
        header {
            background-color: rgba(255, 255, 255, 0.96);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            font-weight: 700;
            font-size: 1.6rem;
            color: var(--primary);
            text-decoration: none;
        }

        .logo i {
            margin-right: 10px;
            font-size: 1.8rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .logo span {
            color: var(--secondary);
        }

        .nav-links {
            display: flex;
            list-style: none;
        }

        .nav-links li {
            margin: 0 15px;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 0;
            background: var(--primary);
            transition: var(--transition);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .auth-buttons {
            display: flex;
            gap: 15px;
        }

        .btn {
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 1rem;
            border: none;
        }

        .btn-sm {
            padding: 10px 20px;
            font-size: 0.9rem;
        }

        .btn-outline {
            border: 2px solid var(--primary);
            background: transparent;
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(67, 97, 238, 0.05);
            transform: translateY(-3px);
        }

        .btn-primary {
            background: var(--gradient);
            color: white;
            box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(67, 97, 238, 0.4);
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
        }

        .mobile-menu-btn {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--primary);
        }

        /* Hero Section */
        .hero {
            padding: 180px 0 100px;
            position: relative;
            overflow: hidden;
            background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPgogIDxkZWZzPgogICAgPHBhdHRlcm4gaWQ9InBhdHRlcm4iIHg9IjAiIHk9IjAiIHdpZHRoPSI4MCIgaGVpZ2h0PSI4MCIgcGF0dGVyblVuaXRzPSJ1c2VyU3BhY2VPblVzZSIgcGF0dGVyblRyYW5zZm9ybT0icm90YXRlKDQ1KSI+CiAgICAgIDxyZWN0IHg9IjAiIHk9IjAiIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCIgZmlsbD0icmdiYSg2NywgOTcsIDIzOCwgMC4wMikiLz4KICAgIDwvcGF0dGVybj4KICA8L2RlZnM+CiAgPHJlY3Qgd2lkdGg9IjEwMCUiIGhlaWdodD0iMTAwJSIgZmlsbD0idXJsKCNwYXR0ZXJuKSIvPgo8L3N2Zz4=') center/cover no-repeat;
        }

        .hero-content {
            display: flex;
            align-items: center;
            gap: 60px;
        }

        .hero-text {
            flex: 1;
            position: relative;
            z-index: 2;
        }

        .hero-image {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .hero h1 {
            font-size: 3.3rem;
            margin-bottom: 20px;
            line-height: 1.2;
            color: var(--dark);
        }

        .hero h1 .highlight {
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 700;
        }

        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 30px;
            max-width: 550px;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
        }

        .stat-item {
            display: flex;
            flex-direction: column;
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
        }

        .stat-text {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-top: 5px;
        }

        .hero-image img {
            max-width: 95%;
            border-radius: 25px;
            box-shadow: 0 30px 60px rgba(67, 97, 238, 0.15);
            transform: perspective(1000px) rotateY(-5deg);
            transition: var(--transition);
        }

        .hero-image img:hover {
            transform: perspective(1000px) rotateY(0);
        }

        /* Features */
        .features {
            padding: 100px 0 80px;
            background: white;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 40px;
        }

        .section-header h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
            color: var(--dark);
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            width: 70%;
            height: 4px;
            background: var(--gradient);
            bottom: -10px;
            left: 15%;
            border-radius: 10px;
        }

        .section-header p {
            color: var(--text-light);
            font-size: 1.1rem;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 35px;
        }

        .feature-card {
            background: var(--light);
            border-radius: 18px;
            padding: 35px 30px;
            text-align: center;
            transition: var(--transition);
            border: 1px solid rgba(67, 97, 238, 0.07);
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--gradient);
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(67, 97, 238, 0.12);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            border-radius: 20px;
            background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(63, 55, 201, 0.1));
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 0 auto 25px;
            font-size: 1.9rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.1);
            background: var(--gradient);
            color: white;
        }

        .feature-card h3 {
            margin: 15px 0 18px;
            font-size: 1.45rem;
            color: var(--dark);
        }

        .feature-card p {
            color: var(--text-light);
            font-size: 1.03rem;
        }

        /* Testimonials */
        .testimonials {
            padding: 100px 0;
            background: linear-gradient(135deg, rgba(67, 97, 238, 0.03), rgba(63, 55, 201, 0.03));
            position: relative;
            overflow: hidden;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .testimonial {
            background: white;
            border-radius: 20px;
            padding: 40px 35px;
            position: relative;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .testimonial:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
        }

        .testimonial:before {
            content: '\201C';
            position: absolute;
            top: 15px;
            right: 20px;
            font-size: 6rem;
            font-family: sans-serif;
            color: rgba(67, 97, 238, 0.05);
            line-height: 1;
        }

        .stars {
            color: #ffc107;
            font-size: 1.1rem;
            margin-bottom: 20px;
        }

        .testimonial p {
            font-size: 1.08rem;
            color: var(--text-light);
            line-height: 1.8;
            font-style: italic;
            position: relative;
            z-index: 2;
        }

        .client-info {
            display: flex;
            align-items: center;
            margin-top: 30px;
        }

        .client-image {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: var(--light);
            margin-right: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            font-weight: 600;
            position: relative;
            overflow: hidden;
            border: 2px solid rgba(67, 97, 238, 0.1);
        }

        .client-image::before {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(67, 97, 238, 0.05), rgba(63, 55, 201, 0.05));
        }

        .client-details h4 {
            font-size: 1.18rem;
            margin-bottom: 6px;
            color: var(--dark);
        }

        .client-details p {
            color: var(--primary);
            font-style: normal;
            font-size: 0.95rem;
        }

        /* Pricing */
        .pricing {
            padding: 100px 0;
            background: white;
            position: relative;
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 35px;
        }

        .pricing-card {
            background: white;
            border-radius: 25px;
            padding: 40px 35px;
            text-align: center;
            position: relative;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        /* .pricing-card.popular {
            border: 2px solid var(--primary);
            transform: scale(1.03);
            z-index: 2;
            box-shadow: 0 15px 50px rgba(67, 97, 238, 0.15);
        } */

        /* 套餐卡片选中效果 */
        .pricing-card.selected {
            border: 2px solid var(--primary); /* 使用不同的颜色区分选中状态 */
            transform: scale(1.03);
            z-index: 2;
            box-shadow: 0 15px 50px rgba(76, 201, 240, 0.2); /* 使用淡蓝色阴影 */
        }

        .pricing-card.selected .pricing-name {
            color: var(--primary);/* 标题颜色变化 */
        }

        .popular-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--gradient);
            color: white;
            padding: 6px 22px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
        }

        .pricing-header {
            margin-bottom: 30px;
            flex: 1;
        }

        .pricing-name {
            font-size: 1.5rem;
            color: var(--dark);
            margin-bottom: 10px;
            font-weight: 600;
        }

        .pricing-desc {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 15px;
        }

        .pricing-price {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--primary);
            margin: 20px 0;
        }

        .pricing-price span {
            font-size: 1rem;
            color: var(--text-light);
            font-weight: 400;
        }

        .pricing-features {
            margin: 25px 0 35px;
            text-align: left;
            flex: 1;
        }

        .pricing-features li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            list-style: none;
            display: flex;
            align-items: center;
            color: var(--dark);
        }

        .pricing-features li:last-child {
            border-bottom: none;
        }

        .pricing-features li i {
            margin-right: 12px;
            font-size: 1.1rem;
            color: var(--primary);
            background: rgba(67, 97, 238, 0.1);
            width: 26px;
            height: 26px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .pricing-features .popular i {
            color: white;
            background: var(--primary);
        }

        /* FAQ Section */
        .faq {
            padding: 100px 0;
            background: linear-gradient(135deg, rgba(67, 97, 238, 0.03), rgba(63, 55, 201, 0.03));
        }

        .faq-container {
            max-width: 850px;
            margin: 0 auto;
        }

        .faq-item {
            background: white;
            border-radius: 18px;
            margin-bottom: 25px;
            overflow: hidden;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }

        .faq-question {
            padding: 28px 35px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.15rem;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: rgba(67, 97, 238, 0.03);
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s ease;
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            color: var(--text-light);
            padding: 0 35px;
            transition: var(--transition);
            border-top: 1px solid rgba(0, 0, 0, 0.05);
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
            padding: 0 35px 30px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-link {
            text-align: center;
            margin-top: 50px;
        }

        .faq-link a {
            display: inline-flex;
            align-items: center;
            color: var(--primary);
            font-weight: 500;
            text-decoration: none;
            gap: 8px;
            font-size: 1.1rem;
            border-bottom: 2px solid transparent;
            padding-bottom: 4px;
            transition: var(--transition);
        }

        .faq-link a:hover {
            border-bottom-color: var(--primary);
        }

        /* CTA Section */

        /* Help Center Styles - New */
        .main-content {
            padding: 120px 0 60px;
            min-height: calc(100vh - 300px);
        }

        .help-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .help-header h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .help-header p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
        }

        .search-container {
            display: flex;
            max-width: 700px;
            margin: 0 auto 50px;
            border-radius: 50px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            border: 1px solid rgba(67, 97, 238, 0.1);
        }

        .search-input {
            flex: 1;
            padding: 15px 25px;
            border: none;
            outline: none;
            font-size: 1rem;
        }

        .search-button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            transition: var(--transition);
        }

        .search-button:hover {
            background: var(--primary-dark);
        }

        .faq-categories {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 40px;
        }

        .category-btn {
            padding: 10px 20px;
            background: white;
            border: 1px solid rgba(67, 97, 238, 0.2);
            border-radius: 30px;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .category-btn:hover, 
        .category-btn.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .faq-section {
            margin-bottom: 50px;
        }

        .faq-section h2 {
            display: flex;
            align-items: center;
            gap: 15px;
            font-size: 1.5rem;
            color: var(--dark);
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .faq-section h2 i {
            color: var(--primary);
        }

        .faq-item {
            background: white;
            border-radius: 10px;
            margin-bottom: 15px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .faq-question:hover {
            background: rgba(67, 97, 238, 0.05);
        }

        .faq-question span {
            font-weight: 500;
            color: var(--dark);
        }

        .faq-icon {
            color: var(--primary);
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }

        .faq-item.active .faq-answer {
            padding: 0 20px 20px;
            max-height: 1000px;
        }

        .faq-answer p {
            color: var(--text);
            margin-bottom: 15px;
        }

        .faq-answer ul, 
        .faq-answer ol {
            padding-left: 20px;
            margin-bottom: 15px;
        }

        .faq-answer li {
            margin-bottom: 8px;
            color: var(--text);
        }

        .contact-support {
            background: linear-gradient(135deg, rgba(67, 97, 238, 0.05), rgba(63, 55, 201, 0.05));
            padding: 40px;
            border-radius: 20px;
            margin-top: 60px;
            text-align: center;
        }

        .contact-support h2 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .contact-support p {
            color: var(--text-light);
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .contact-form {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }

        .form-group {
            text-align: left;
        }

        .form-group.full-width {
            grid-column: span 2;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: var(--dark);
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
            outline: none;
        }

        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }

        @media (max-width: 768px) {
            .main-content {
                padding: 100px 0 40px;
            }
    
            .help-header h1 {
                font-size: 2rem;
            }
    
            .search-container {
                flex-direction: column;
                border-radius: 10px;
            }
    
            .search-input {
                width: 100%;
                border-radius: 10px 10px 0 0;
            }
    
            .search-button {
                width: 100%;
                padding: 15px;
                border-radius: 0 0 10px 10px;
            }
    
            .faq-categories {
                overflow-x: auto;
                justify-content: flex-start;
                padding-bottom: 10px;
            }
    
            .category-btn {
                white-space: nowrap;
            }
    
            .contact-form {
                grid-template-columns: 1fr;
            }
    
            .form-group.full-width {
                grid-column: span 1;
            }
        }
        .cta {
            padding: 100px 0;
            background: var(--gradient);
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;base64,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');
            opacity: 0.2;
        }

        .cta h2 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }

        .cta p {
            max-width: 700px;
            margin: 0 auto 35px;
            font-size: 1.25rem;
            opacity: 0.9;
            position: relative;
            z-index: 2;
        }

        .cta .btn {
            background: white;
            color: var(--primary);
            padding: 18px 50px;
            font-size: 1.15rem;
            font-weight: 600;
            position: relative;
            z-index: 2;
            transition: var(--transition);
        }

        .cta .btn:hover {
            transform: scale(1.05);
        }

        /* Footer */
        footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 80px 0 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 45px;
            margin-bottom: 60px;
        }

        .footer-column h3 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.35rem;
            position: relative;
            padding-bottom: 12px;
        }

        .footer-column h3::after {
            content: '';
            position: absolute;
            width: 60px;
            height: 3px;
            bottom: 0;
            left: 0;
            background: var(--gradient);
            border-radius: 3px;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 15px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-links a i {
            font-size: 0.9rem;
            width: 18px;
            text-align: center;
        }

        .footer-links a:hover {
            color: white;
            transform: translateX(5px);
        }

        .app-download {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .app-btn {
            width: 165px;
            height: 55px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            color: white;
            font-size: 1rem;
            font-weight: 500;
            transition: var(--transition);
            padding: 0 15px;
        }

        .app-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
        }

        .app-btn-ios {
            background: #000;
        }

        .app-btn-android {
            background: #3cba54;
        }

        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 25px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: white;
            text-decoration: none;
            transition: var(--transition);
            font-size: 1.2rem;
        }

        .social-links a:hover {
            background: var(--primary);
            transform: translateY(-5px);
        }

        .copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .copyright a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: var(--transition);
        }

        .copyright a:hover {
            color: white;
            text-decoration: underline;
        }

        /* 套餐选择器样式 */
        .plan-selector {
            display: flex;
            border-radius: 50px;
            padding: 8px;
            background: #ffffff;
            border: 1px solid #e2e8f0;
            margin: 0 auto 40px;
            max-width: 500px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .plan-option {
            flex: 1;
            padding: 15px;
            text-align: center;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            border-radius: 50px;
            transition: all 0.3s ease;
        }
        
        .plan-option.active {
            background: #4361ee;
            color: white;
        }
        
        /* Legal Pages Styles */
        .legal-content {
            padding: 120px 0 60px;
            min-height: calc(100vh - 300px);
        }

        .legal-header {
            text-align: center;
            margin-bottom: 50px;
            padding-bottom: 30px;
            /* border-bottom: 1px solid rgba(0, 0, 0, 0.1); */
        }

        .legal-header h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .legal-header p {
            color: var(--text-light);
            font-size: 1rem;
        }

        .legal-section {
            margin-bottom: 40px;
            padding-bottom: 20px;
        }

        .legal-section h2 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .legal-section h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-top: 25px;
            margin-bottom: 15px;
        }

        .legal-section p {
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .legal-section ul,
        .legal-section ol {
            margin-bottom: 20px;
            padding-left: 20px;
        }

        .legal-section li {
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .legal-section strong {
            color: var(--dark);
            font-weight: 600;
        }

        .legal-section a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        .legal-section a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* Legal Pages Responsive Design */
        @media (max-width: 768px) {
            .legal-content {
                padding: 100px 0 40px;
            }

            .legal-header {
                margin-bottom: 30px;
                padding-bottom: 20px;
            }

            .legal-header h1 {
                font-size: 2rem;
            }

            .legal-section h2 {
                font-size: 1.5rem;
            }

            .legal-section {
                margin-bottom: 30px;
            }
        }

        /* Pricing Page Styles */
        .pricing-hero {
            padding: 40px 0 0px;
            text-align: center;
            background-color: var(--light);
        }

        .text-center {
            text-align: center;
        }

        /* Pricing Toggle */
        .pricing-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            /* margin: 30px 0; */
        }

        .toggle-label {
            font-size: 1rem;
            color: var(--text-light);
            margin: 0 10px;
            cursor: pointer;
            transition: var(--transition);
        }

        .toggle-label.active {
            color: var(--dark);
            font-weight: 500;
        }

        .save-badge {
            display: inline-block;
            background-color: var(--primary);
            color: white;
            font-size: 0.7rem;
            padding: 2px 8px;
            border-radius: 10px;
            margin-left: 5px;
            font-weight: 600;
        }

        /* Toggle Switch */
        .switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }

        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 18px;
            width: 18px;
            left: 3px;
            bottom: 3px;
            background-color: white;
            transition: .4s;
        }

        input:checked + .slider {
            background-color: var(--primary);
        }

        input:focus + .slider {
            box-shadow: 0 0 1px var(--primary);
        }

        input:checked + .slider:before {
            transform: translateX(26px);
        }

        .slider.round {
            border-radius: 24px;
        }

        .slider.round:before {
            border-radius: 50%;
        }

        /* Pricing Cards Section */
        .pricing-cards {
            padding: 60px 0;
        }

        /* Feature Comparison Table */
        .feature-comparison {
            padding: 60px 0;
            background-color: var(--light);
        }

        .comparison-table-wrapper {
            overflow-x: auto;
            margin-top: 40px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            border-spacing: 0;
            background-color: white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border-radius: 10px;
            overflow: hidden;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 15px 20px;
            text-align: left;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .comparison-table th {
            background-color: var(--primary);
            color: white;
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
        }

        .comparison-table th:first-child {
            width: 40%;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table .category-row {
            background-color: rgba(0, 0, 0, 0.02);
        }

        .comparison-table .category-row td {
            font-weight: 600;
            color: var(--dark);
            padding: 12px 20px;
            font-size: 1.1rem;
        }

        .comparison-table .fa-check {
            color: var(--success);
        }

        .comparison-table .fa-times {
            color: var(--text-light);
        }

        /* Enterprise Section */
        .enterprise-section {
            padding: 80px 0;
        }

        .enterprise-content {
            display: flex;
            align-items: center;
            gap: 40px;
        }

        .enterprise-text {
            flex: 1;
        }

        .enterprise-text h2 {
            margin-bottom: 20px;
            color: var(--dark);
        }

        .enterprise-text p {
            margin-bottom: 20px;
            color: var(--text);
        }

        .enterprise-text ul {
            margin-bottom: 30px;
            padding-left: 0;
            list-style: none;
        }

        .enterprise-text li {
            margin-bottom: 10px;
            color: var(--text);
            display: flex;
            align-items: center;
        }

        .enterprise-text .fa-check-circle {
            color: var(--success);
            margin-right: 10px;
            font-size: 1.2rem;
        }

        .enterprise-image {
            flex: 1;
            text-align: center;
        }

        .enterprise-image img {
            max-width: 100%;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        /* Pricing FAQ Section */
        .pricing-faq {
            padding: 60px 0;
            background-color: var(--light);
        }

        /* Guarantee Section */
        .guarantee-section {
            padding: 60px 0;
            text-align: center;
        }

        .guarantee-content {
            /* max-width: 700px; */
            margin: 0 auto;
            padding: 40px;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .guarantee-icon {
            /* font-size: 3rem; */
            color: var(--primary);
            margin-bottom: 20px;
        }

        .guarantee-content h2 {
            margin-bottom: 15px;
            color: var(--dark);
        }

        .guarantee-content p {
            color: var(--text);
        }

        /* Responsive Design for Pricing Page */
        @media (max-width: 992px) {
            .enterprise-content {
                flex-direction: column;
            }
    
            .enterprise-image {
                order: -1;
                margin-bottom: 30px;
            }
        }

        @media (max-width: 768px) {
            .pricing-hero {
                padding: 100px 0 30px;
            }
    
            .comparison-table th,
            .comparison-table td {
                padding: 10px 15px;
            }
    
            .comparison-table .category-row td {
                font-size: 1rem;
            }
    
            .guarantee-content {
                padding: 30px 20px;
            }
        }

        @media (max-width: 576px) {
            .pricing-toggle {
                flex-direction: column;
                gap: 10px;
            }
    
            .toggle-label {
                margin: 5px 0;
            }
        }

        /* Authentication Pages Styles */
        .auth-content {
            padding: 120px 0;
            min-height: calc(100vh - 300px);
            background-color: var(--light);
        }

        .auth-container {
            display: flex;
            max-width: 1000px;
            margin: 0 auto;
            background: white;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }

        .auth-form-container {
            flex: 1;
            padding: 40px;
        }

        .auth-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .auth-header h1 {
            font-size: 2rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .auth-header p {
            color: var(--text-light);
        }

        .auth-form {
            max-width: 400px;
            margin: 0 auto;
        }

        .form-group {
            /* margin-bottom: 20px; */
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: var(--dark);
            font-weight: 500;
        }

        .input-with-icon {
            position: relative;
        }

        .input-with-icon i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-light);
        }

        .input-with-icon .form-control {
            padding-left: 45px;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
        }

        .password-toggle {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
            padding: 0;
        }

        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .remember-me {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .remember-me input[type="checkbox"] {
            width: 16px;
            height: 16px;
        }

        .forgot-password {
            color: var(--primary);
            text-decoration: none;
            font-size: 0.9rem;
        }

        .forgot-password:hover {
            text-decoration: underline;
        }

        .btn-block {
            width: 100%;
        }

        .auth-divider {
            text-align: center;
            margin: 20px 0;
            position: relative;
        }

        .auth-divider::before,
        .auth-divider::after {
            content: '';
            position: absolute;
            top: 50%;
            width: calc(50% - 50px);
            height: 1px;
            background-color: rgba(0, 0, 0, 0.1);
        }

        .auth-divider::before {
            left: 0;
        }

        .auth-divider::after {
            right: 0;
        }

        .auth-divider span {
            background-color: white;
            padding: 0 15px;
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .social-auth {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-bottom: 20px;
        }

        .btn-social {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background-color: white;
            border: 1px solid rgba(0, 0, 0, 0.1);
            color: var(--text);
            padding: 12px;
            border-radius: 8px;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .btn-social:hover {
            background-color: var(--light);
        }

        .btn-google i {
            color: #DB4437;
        }

        .btn-facebook i {
            color: #4267B2;
        }

        .auth-footer {
            text-align: center;
            margin-top: 30px;
            color: var(--text-light);
        }

        .auth-footer a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }

        .auth-footer a:hover {
            text-decoration: underline;
        }

        .auth-image {
            flex: 1;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
        }

        .auth-image img {
            max-width: 100%;
            height: auto;
            margin-bottom: 40px;
        }

        .auth-testimonial {
            text-align: center;
            max-width: 400px;
        }

        .auth-testimonial p {
            font-size: 1.1rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
        }

        .testimonial-author img {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            margin: 0;
        }

        .testimonial-author h4 {
            margin: 0;
            font-size: 1rem;
        }

        .testimonial-author p {
            margin: 0;
            font-size: 0.9rem;
            opacity: 0.8;
        }

        /* Password Strength Meter */
        .password-strength {
            margin-top: 10px;
        }

        .strength-meter {
            height: 4px;
            background-color: #e6e6e6;
            border-radius: 2px;
            margin-bottom: 5px;
        }

        .strength-meter-fill {
            height: 100%;
            border-radius: 2px;
            transition: width 0.3s ease;
        }

        .strength-meter-fill[data-strength="0"] {
            width: 20%;
            background-color: #ff4d4d;
        }

        .strength-meter-fill[data-strength="1"] {
            width: 40%;
            background-color: #ffa64d;
        }

        .strength-meter-fill[data-strength="2"] {
            width: 60%;
            background-color: #ffcc00;
        }

        .strength-meter-fill[data-strength="3"] {
            width: 80%;
            background-color: #9fcc00;
        }

        .strength-meter-fill[data-strength="4"] {
            width: 100%;
            background-color: #33cc33;
        }

        .strength-text {
            font-size: 0.8rem;
            color: var(--text-light);
        }

        .checkbox-group {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .checkbox-group input[type="checkbox"] {
            margin-top: 3px;
        }

        .checkbox-group label {
            font-size: 0.9rem;
            color: var(--text);
            margin-bottom: 0;
        }

        .checkbox-group a {
            color: var(--primary);
            text-decoration: none;
        }

        .checkbox-group a:hover {
            text-decoration: underline;
        }

        /* Reset Password Success Message */
        .reset-success {
            text-align: center;
            padding: 20px;
        }

        .success-icon {
            font-size: 4rem;
            color: var(--success);
            margin-bottom: 20px;
        }

        .reset-success h2 {
            color: var(--dark);
            margin-bottom: 15px;
        }

        .reset-success p {
            color: var(--text);
            margin-bottom: 20px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .email-note {
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .email-note a {
            color: var(--primary);
            text-decoration: none;
        }

        .email-note a:hover {
            text-decoration: underline;
        }

        /* Upload Page Styles */
        .upload-content {
            padding: 120px 0;
            background-color: var(--light);
            min-height: calc(100vh - 300px);
        }

        .upload-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .upload-header h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .upload-header p {
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }

        .upload-container {
            max-width: 800px;
            margin: 0 auto;
            background-color: white;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            padding: 40px;
        }

        .upload-area {
            border: 2px dashed rgba(0, 0, 0, 0.1);
            border-radius: 10px;
            padding: 40px;
            text-align: center;
            transition: var(--transition);
            margin-bottom: 30px;
        }

        .upload-area.highlight {
            border-color: var(--primary);
            background-color: rgba(var(--primary-rgb), 0.05);
        }

        .upload-icon {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .upload-area h3 {
            font-size: 1.5rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .upload-area p {
            margin-bottom: 15px;
            color: var(--text-light);
        }

        .upload-info {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 20px;
        }

        .upload-list-container {
            margin-bottom: 30px;
        }

        .upload-list-container h3 {
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .upload-list {
            max-height: 300px;
            overflow-y: auto;
            border: 1px solid rgba(0, 0, 0, 0.1);
            border-radius: 10px;
            padding: 10px;
        }

        .upload-item {
            display: flex;
            align-items: center;
            padding: 15px;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .upload-item:last-child {
            border-bottom: none;
        }

        .file-info {
            display: flex;
            align-items: center;
            flex: 1;
            min-width: 0;
            margin-right: 15px;
        }

        .file-icon {
            font-size: 1.5rem;
            color: var(--primary);
            margin-right: 15px;
        }

        .file-details {
            min-width: 0;
        }

        .file-name {
            font-weight: 500;
            color: var(--dark);
            margin-bottom: 5px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 200px;
        }

        .file-size {
            font-size: 0.8rem;
            color: var(--text-light);
        }

        .file-progress {
            flex: 1;
            margin-right: 15px;
            display: flex;
            align-items: center;
        }

        .progress-bar {
            flex: 1;
            height: 6px;
            background-color: rgba(0, 0, 0, 0.05);
            border-radius: 3px;
            overflow: hidden;
            margin-right: 10px;
        }

        .progress-bar-fill {
            height: 100%;
            background-color: var(--primary);
            border-radius: 3px;
            transition: width 0.3s ease;
        }

        .progress-text {
            font-size: 0.8rem;
            color: var(--text-light);
            width: 40px;
            text-align: right;
        }

        .file-actions {
            display: flex;
        }

        .btn-icon {
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1rem;
            cursor: pointer;
            padding: 5px;
            transition: var(--transition);
        }

        .btn-icon:hover {
            color: var(--danger);
        }

        .upload-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 30px;
        }

        .upload-status {
            background-color: var(--light);
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            margin-bottom: 30px;
        }

        .status-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .status-text h3 {
            font-size: 1.5rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .status-text p {
            color: var(--text-light);
            margin-bottom: 20px;
        }

        .overall-progress {
            max-width: 400px;
            margin: 0 auto;
        }

        .progress-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--text);
        }

        .upload-complete {
            text-align: center;
            padding: 30px;
        }

        .complete-icon {
            font-size: 3rem;
            color: var(--success);
            margin-bottom: 20px;
        }

        .upload-complete h3 {
            font-size: 1.8rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .upload-complete p {
            color: var(--text-light);
            margin-bottom: 30px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .complete-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
        }

        /* Upload Page Responsive Design */
        @media (max-width: 768px) {
            .upload-container {
                padding: 20px;
            }
    
            .upload-area {
                padding: 20px;
            }
    
            .file-info {
                flex-direction: column;
                align-items: flex-start;
            }
    
            .file-icon {
                margin-bottom: 10px;
            }
    
            .upload-item {
                flex-direction: column;
                align-items: stretch;
            }
    
            .file-progress {
                margin: 15px 0;
            }
    
            .file-actions {
                justify-content: flex-end;
            }
    
            .complete-actions {
                flex-direction: column;
            }
        }

        @media (max-width: 576px) {
            .upload-header h1 {
                font-size: 2rem;
            }
    
            .upload-container {
                border-radius: 0;
                box-shadow: none;
            }
        }

        /* Security Page Styles */
        .security-content {
            padding: 120px 0;
            background-color: var(--light);
        }

        .security-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .security-header h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .security-header p {
            color: var(--text-light);
            font-size: 1.2rem;
        }

        .security-overview {
            margin-bottom: 60px;
        }

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

        .security-card {
            background-color: white;
            border-radius: 15px;
            padding: 30px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .security-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .security-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .security-card h3 {
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .security-card p {
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .security-sections {
            display: flex;
            flex-direction: column;
            gap: 50px;
        }

        .security-section {
            background-color: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
        }

        .security-section h2 {
            background-color: var(--primary);
            color: white;
            padding: 20px 30px;
            margin: 0;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
        }

        .security-section h2 i {
            margin-right: 15px;
        }

        .security-content-box {
            padding: 30px;
        }

        .security-content-box h3 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .security-list {
            list-style: none;
            padding: 0;
        }

        .security-list li {
            padding: 15px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            display: flex;
            align-items: flex-start;
        }

        .security-list li:last-child {
            border-bottom: none;
        }

        .security-list li strong {
            color: var(--dark);
            min-width: 180px;
            margin-right: 20px;
        }

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

        .compliance-item {
            text-align: center;
            padding: 20px;
            border-radius: 10px;
            background-color: var(--light);
        }

        .compliance-item img {
            height: 60px;
            margin-bottom: 15px;
        }

        .compliance-item h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .compliance-item p {
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .best-practices {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .practice-item {
            padding: 20px;
            border-radius: 10px;
            background-color: var(--light);
        }

        .practice-item h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
        }

        .practice-item h4 i {
            color: var(--primary);
            margin-right: 10px;
        }

        .practice-item p {
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .security-contacts {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .contact-item {
            text-align: center;
            padding: 30px;
            border-radius: 10px;
            background-color: var(--light);
        }

        .contact-item i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .contact-item h4 {
            font-size: 1.2rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .contact-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }

        /* Security Page Responsive Design */
        @media (max-width: 992px) {
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
    
            .compliance-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .best-practices {
                grid-template-columns: 1fr;
            }
    
            .security-contacts {
                grid-template-columns: 1fr;
            }
    
            .security-list li {
                flex-direction: column;
            }
    
            .security-list li strong {
                margin-bottom: 5px;
            }
        }

        @media (max-width: 576px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
    
            .compliance-grid {
                grid-template-columns: 1fr;
            }
    
            .security-section h2 {
                font-size: 1.3rem;
                padding: 15px 20px;
            }
    
            .security-content-box {
                padding: 20px;
            }
        }

        /* Authentication Pages Responsive Design */
        @media (max-width: 992px) {
            .auth-container {
                flex-direction: column;
                max-width: 600px;
            }
    
            .auth-image {
                padding: 60px 40px;
            }
        }

        @media (max-width: 576px) {
            .auth-content {
                padding: 40px 0;
            }
    
            .auth-container {
                border-radius: 0;
                box-shadow: none;
            }
    
            .auth-form-container {
                padding: 20px;
            }
    
            .auth-image {
                padding: 40px 20px;
            }
    
            .social-auth {
                grid-template-columns: 1fr;
            }
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }

            .hero-text p {
                margin: 0 auto 30px;
            }

            .hero-buttons {
                justify-content: center;
            }

            .hero-stats {
                justify-content: center;
            }
        }
        
        @media (max-width: 600px) {
            .plan-selector {
                max-width: 100%;
                flex-direction: column;
                border-radius: 16px;
            }
            
            .plan-option {
                border-radius: 12px;
                margin-bottom: 5px;
            }
            
            .plan-option:last-child {
                margin-bottom: 0;
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 20px 0;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
                z-index: 100;
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links li {
                margin: 10px 0;
                text-align: center;
            }

            .nav-links a::after {
                display: none;
            }

            .hero {
                padding: 160px 0 80px;
            }

            .hero h1 {
                font-size: 2.6rem;
            }

            .section-header h2 {
                font-size: 2.2rem;
            }

            .pricing-card.popular {
                transform: scale(1);
            }

            .app-download {
                flex-direction: column;
            }
        }

        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2.1rem;
            }

            .hero p {
                font-size: 1.05rem;
            }

            .hero-buttons .btn {
                padding: 12px 25px;
                width: 100%;
                max-width: 300px;
            }

            .hero-stats {
                flex-direction: column;
                gap: 20px;
                margin-top: 30px;
            }

            .testimonial {
                padding: 30px 25px;
            }

            .feature-card {
                padding: 30px 25px;
            }

            .section-header p {
                font-size: 1rem;
            }

            .cta h2 {
                font-size: 2.3rem;
            }

            .cta p {
                font-size: 1.1rem;
            }
        }
        
    /* 增强移动端导航栏样式 */
    @media (max-width: 768px) {
        /* 确保移动菜单按钮显示 */
        .mobile-menu-btn {
            display: block;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--primary);
            z-index: 1001;
        }
        
        /* 导航链接默认隐藏 */
        .nav-links {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: white;
            flex-direction: column;
            padding: 20px 0;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
            z-index: 1000;
            /* 添加动画效果 */
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        
        /* 当添加active类时显示导航链接 */
        .nav-links.active {
            display: flex;
            max-height: 300px; /* 足够容纳菜单项的高度 */
        }
        
        /* 导航链接项样式 */
        .nav-links li {
            margin: 10px 0;
            text-align: center;
            width: 100%;
        }
        
        .nav-links a {
            display: block;
            padding: 10px 20px;
            width: 100%;
            /* 添加悬停效果 */
            color: var(--dark);
        }
        
        .nav-links a::after {
            display: none; /* 在移动端隐藏下划线动画 */
        }
        
        .nav-links a:hover {
            background-color: rgba(67, 97, 238, 0.05); /* 添加背景色变化效果 */
        }
        
        /* 认证按钮在移动端隐藏 */
        .auth-buttons {
            display: none;
        }
        /* 手机端隐藏用户评价部分 */
        .testimonials {
            display: none;
        }
    }
    
    @media (min-width: 769px) {
        /* 大屏幕上隐藏移动菜单按钮 */
        .mobile-menu-btn {
            display: none;
        }
        
        /* 确保导航链接在大屏幕上显示 */
        .nav-links {
            display: flex;
        }
    }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* Add to your existing styles */
        .ad-container {
            margin: 40px auto;
            max-width: 1200px;
            padding: 0 20px;
            text-align: center;
        }

        .ad-container ins {
          margin: 0 auto;
        }

        /* Responsive adjustments */
        @media (max-width: 768px) {
            .ad-container {
                margin: 30px auto;
            }
        }

        

.demo-model  {
    font-size: 16px;
    background-color: #fff;
    width: 350px;
    position: fixed;
    z-index: 10;
    margin: 0;
    /*top: calc((100vh - 560px - 3.6rem)/2 + 3.6rem);*/
    box-sizing: border-box;
    overflow: hidden;
    background-repeat: no-repeat;
    background-size: 100%;
    box-shadow: 0 4px 25px #04283c2e;
    border-radius: 30px;
    padding: 5px;
    
    width:350px;
    height: calc(330px * 143.6 / 70.9);
    top: calc((100vh - 330px * 143.6 / 70.9 - 3.6rem) / 2 + 3.6rem);
    right: 0;
    margin-right: 77px
}

.model-content  {
    box-sizing: border-box;
    height: 100%;
    border-bottom-left-radius: 30px
}

.iframe  {
    height: 100%;
    width: 100%;
    border-radius: 30px;
    overflow: hidden;
}

@media screen and (min-width: 1200px) {
    .demo-model  {
        width:350px;
        height: calc(310px * 143.6 / 70.9);
        top: calc((100vh - 110px * 143.6 / 70.9 - 3.6rem) / 2 + 3.6rem);
        right: 0;
        margin-right: 0
    }
}

@media  (max-device-width: 1280px) {
    .demo-model  {
        height: calc(310px * 143.6 / 70.9);
        top: calc((100vh - 110px * 143.6 / 70.9 - 3.6rem) / 2 + 3.6rem);
        right: 0;
        margin-right: 0
    }
}

@media only screen and (max-device-width: 480px) {
    .demo-model ,.Helper  {
        display:none
    }
}

@media screen and (max-device-width: 969px) {
    .demo-model ,.Helper  {
        display: none
    }
}

@media screen and (min-width: 1366px) {
    .demo-model  {
        width:350px;
        height: calc(270px * 143.6 / 70.9);
        top: calc((100vh - 110px * 143.6 / 70.9 - 3.6rem) / 2 + 3.6rem);
        right: 0;
        margin-right: 5px
    }
}

@media screen and (min-width: 1500px) {
    .demo-model  {
        width:350px;
        height: calc(295px * 143.6 / 70.9);
        top: calc((100vh - 310px * 143.6 / 70.9 - 3.6rem) / 2 + 5.6rem);
        right: 0;
        margin-right: 66px
    }
}

@media screen and (min-width: 1920px) {
    .demo-model  {
        width:350px;
        height: calc(330px * 143.6 / 70.9);
        top: calc((100vh - 330px * 143.6 / 70.9 - 3.6rem) / 2 + 3.6rem);
        right: 0;
        margin-right: 77px
    }
}
/* Previous CSS styles remain the same... */

/* How It Works Section */
.how-it-works {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.03), rgba(63, 55, 201, 0.03));
    position: relative;
}

.steps {
    display: flex;
    justify-content: space-between;
    margin: 60px 0;
    position: relative;
}

.step {
    flex: 1;
    text-align: center;
    padding: 0 25px;
    position: relative;
    z-index: 2;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 70px;
    right: -50px;
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    z-index: 1;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0 auto 20px;
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.3);
}

.step-icon {
    width: 100px;
    height: 100px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary);
    margin: 0 auto 25px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.step:hover .step-icon {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.step h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.step p {
    color: var(--text-light);
    line-height: 1.7;
}

.cta-center {
    text-align: center;
    margin-top: 50px;
}

/* Help Center Styles */
.help-hero {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.05), rgba(63, 55, 201, 0.05));
    text-align: center;
}

.help-search {
    max-width: 700px;
    margin: 40px auto;
}

.search-box {
    display: flex;
    align-items: center;
    background: white;
    border-radius: 50px;
    padding: 8px 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(67, 97, 238, 0.1);
}

.search-box i {
    color: var(--primary);
    font-size: 1.2rem;
    margin-right: 15px;
}

.search-box input {
    flex: 1;
    border: none;
    outline: none;
    padding: 12px;
    font-size: 1.1rem;
    color: var(--dark);
}

.search-box .btn {
    margin-left: 10px;
}

/* Quick Links Section */
.quick-links {
    padding: 60px 0;
    background: white;
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.quick-link-card {
    background: white;
    border-radius: 20px;
    padding: 35px 30px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(67, 97, 238, 0.1);
    transition: var(--transition);
    text-decoration: none;
    color: var(--dark);
}

.quick-link-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(67, 97, 238, 0.1);
}

.quick-link-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.quick-link-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.quick-link-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Help Section */
.help-section {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.03), rgba(63, 55, 201, 0.03));
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.help-card {
    background: white;
    border-radius: 20px;
    padding: 35px;
    box-shadow: var(--shadow);
}

.help-card h3 {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    color: var(--dark);
    font-size: 1.3rem;
}

.help-card h3 i {
    color: var(--primary);
    font-size: 1.4rem;
}

.help-card ul {
    list-style: none;
}

.help-card ul li {
    margin-bottom: 15px;
}

.help-card ul li:last-child {
    margin-bottom: 0;
}

.help-card ul li a {
    color: var(--text);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    padding: 10px 15px;
    border-radius: 8px;
}

.help-card ul li a:hover {
    background: rgba(67, 97, 238, 0.05);
    color: var(--primary);
    transform: translateX(5px);
}

/* Contact Support Section */
.contact-support {
    /* padding: 80px 0; */
    background: white;
}

.support-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.support-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.support-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(67, 97, 238, 0.1);
    transition: var(--transition);
}

.support-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(67, 97, 238, 0.1);
}

.support-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 25px;
}

.support-card h3 {
    margin-bottom: 15px;
    color: var(--dark);
    font-size: 1.4rem;
}

.support-card p {
    color: var(--text-light);
    margin-bottom: 25px;
}

/* Responsive Design for Help Center */
@media (max-width: 768px) {
    .help-hero {
        padding: 140px 0 60px;
    }

    .search-box {
        flex-direction: column;
        padding: 15px;
        border-radius: 15px;
    }

    .search-box input {
        width: 100%;
        margin: 10px 0;
        text-align: center;
    }

    .search-box .btn {
        width: 100%;
        margin: 10px 0 0;
    }

    .quick-link-card,
    .help-card,
    .support-card {
        padding: 25px 20px;
    }
}

/* CTA Section - Enhanced */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiPgogIDxkZWZzPgogICAgPHBhdHRlcm4gaWQ9InBhdHRlcm4iIHg9IjAiIHk9IjAiIHdpZHRoPSI4MCIgaGVpZ2h0PSI4MCIgcGF0dGVyblVuaXRzPSJ1c2VyU3BhY2VPblVzZSIgcGF0dGVyblRyYW5zZm9ybT0icm90YXRlKDQ1KSI+CiAgICAgIDxyZWN0IHg9IjAiIHk9IjAiIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCIgZmlsbD0icmdiYSgyNTUsIDI1NSwgMjU1LCAwLjA1KSIvPgogICAgPC9wYXR0ZXJuPgogIDwvZGVmcz4KICA8cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSJ1cmwoI3BhdHRlcm4pIi8+Cjwvc3ZnPg==') center/cover no-repeat;
    opacity: 0.1;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 600;
    line-height: 1.3;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.cta-section .btn-outline {
    border-color: white;
    color: white;
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

.cta-section .btn-primary {
    background: white;
    color: var(--primary);
}

.cta-section .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-3px);
}

/* Enhanced Responsive Design for How It Works and CTA */
@media (max-width: 992px) {
    .steps {
        flex-direction: column;
        gap: 50px;
    }

    .step:not(:last-child)::after {
        display: none;
    }

    .step {
        padding: 0 50px;
    }

    .cta-section h2 {
        font-size: 2.3rem;
    }
}

@media (max-width: 768px) {
    .how-it-works {
        padding: 70px 0;
    }

    .step {
        padding: 0 30px;
    }

    .cta-section {
        padding: 70px 0;
    }

    .cta-section h2 {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
        max-width: 300px;
        margin: 0 auto;
    }
}

@media (max-width: 576px) {
    .step-icon {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    .cta-section h2 {
        font-size: 1.8rem;
    }

    .cta-section p {
        font-size: 1.1rem;
    }
}