:root {
            --primary-color: #00c6ff;
            --secondary-color: #0072ff;
            --accent-color: #00d2ff;
            --text-main: #1a1a1a;
            --text-secondary: #555555;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --border-color: #e0e0e0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --radius: 8px;
            --container-width: 1200px;
            --header-height: 70px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* Header */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow-sm);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo img {
            height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 24px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
        }

        .nav-link:hover {
            color: var(--secondary-color);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            transition: width 0.3s ease;
        }

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

        .mobile-toggle {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }

        /* Hero Section */
        .hero {
            padding-top: calc(var(--header-height) + 60px);
            padding-bottom: 80px;
            background: linear-gradient(135deg, #f0f9ff 0%, #e6f7ff 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(0,198,255,0.1) 0%, rgba(255,255,255,0) 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        h1 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #1a1a1a 0%, #4a4a4a 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
        }

        .hero-subtitle {
            font-size: 1.125rem;
            color: var(--text-secondary);
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            box-shadow: 0 4px 12px rgba(0, 114, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 114, 255, 0.4);
        }

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

        .btn-outline:hover {
            background: var(--secondary-color);
            color: white;
        }

        /* Sections General */
        section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            margin: 12px auto 0;
            border-radius: 2px;
        }

        .section-desc {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Features Grid */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid transparent;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 198, 255, 0.2);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, rgba(0,198,255,0.1), rgba(0,114,255,0.1));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--secondary-color);
            font-size: 24px;
        }

        .card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }

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

        /* Comparison Table */
        .comparison-table-wrapper {
            overflow-x: auto;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 20px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }

        th, td {
            padding: 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background: #f8f9fa;
            font-weight: 600;
            color: var(--text-main);
        }

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

        .score-badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
        }

        .score-high {
            background: rgba(0, 255, 136, 0.1);
            color: #00b36e;
        }

        /* Process Steps */
        .steps-container {
            display: flex;
            justify-content: space-between;
            position: relative;
            flex-wrap: wrap;
            gap: 20px;
        }

        .step-item {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            padding: 20px;
        }

        .step-number {
            width: 40px;
            height: 40px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-weight: bold;
            position: relative;
            z-index: 2;
        }

        .step-line {
            position: absolute;
            top: 20px;
            left: 50%;
            width: 100%;
            height: 2px;
            background: var(--border-color);
            z-index: 1;
            display: none;
        }

        @media (min-width: 768px) {
            .step-line { display: block; }
        }

        /* Case Studies */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 24px;
        }

        .case-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            aspect-ratio: 16/9;
            background: #eee;
        }

        .case-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .case-card:hover img {
            transform: scale(1.05);
        }

        .case-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
            padding: 24px;
            color: white;
        }

        /* Reviews */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .review-card {
            background: var(--bg-white);
            padding: 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--primary-color);
        }

        .review-author {
            display: flex;
            align-items: center;
            margin-top: 16px;
        }

        .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #ddd;
            margin-right: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: #666;
        }

        .author-info h4 {
            font-size: 14px;
            margin-bottom: 4px;
        }

        .author-info span {
            font-size: 12px;
            color: #888;
        }

        /* FAQ */
        .faq-item {
            background: var(--bg-white);
            margin-bottom: 16px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            transition: background 0.3s;
        }

        .faq-question:hover {
            background: #fafafa;
        }

        .faq-answer {
            padding: 0 20px 20px;
            color: var(--text-secondary);
            display: none;
            border-top: 1px solid transparent;
            margin-top: 0;
        }

        .faq-item.active .faq-answer {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        .faq-item.active .faq-question {
            color: var(--secondary-color);
        }

        .faq-toggle {
            transition: transform 0.3s;
        }

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

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-5px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Contact Form */
        .form-container {
            background: var(--bg-white);
            padding: 40px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            max-width: 800px;
            margin: 0 auto;
        }

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

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

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 15px;
            transition: border-color 0.3s;
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(0, 114, 255, 0.1);
        }

        .form-textarea {
            resize: vertical;
            min-height: 120px;
        }

        /* Footer */
        footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 60px 0 20px;
            margin-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 16px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #999;
            font-size: 14px;
        }

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

        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            font-size: 13px;
            color: #666;
        }

        /* Floating Elements */
        .floating-customer-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }

        .cs-btn {
            width: 56px;
            height: 56px;
            background: #07c160;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            box-shadow: 0 4px 12px rgba(7, 193, 96, 0.4);
            cursor: pointer;
            transition: transform 0.3s;
        }

        .cs-btn:hover {
            transform: scale(1.1);
        }

        .cs-qr {
            width: 120px;
            background: white;
            padding: 8px;
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s;
            position: absolute;
            bottom: 70px;
            right: 0;
        }

        .floating-customer-service:hover .cs-qr {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .cs-qr img {
            width: 100%;
            border-radius: 4px;
        }

        /* Utilities */
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 16px; }
        .mt-2 { margin-top: 16px; }
        
        /* Responsive */
        @media (max-width: 768px) {
            h1 { font-size: 1.8rem; }
            .nav-menu {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow-md);
                gap: 16px;
            }
            .nav-menu.active { display: flex; }
            .mobile-toggle { display: block; }
            .hero { padding-top: calc(var(--header-height) + 40px); }
            .steps-container { flex-direction: column; }
            .step-line { display: none; }
            .footer-grid { grid-template-columns: 1fr; }
        }