:root {
            --primary-color: #4f46e5;
            --secondary-color: #818cf8;
            --accent-color: #f472b6;
            --background-color: #0f172a;
            --text-color: #1e293b;
            --light-text: #64748b;
            --card-bg: rgba(255, 255, 255, 0.95);
            --gradient-1: linear-gradient(135deg, #4f46e5, #818cf8);
            --gradient-2: linear-gradient(135deg, #f472b6, #fb7185);
            --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

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

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background: var(--background-color);
            min-height: 100vh;
            position: relative;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(244, 114, 182, 0.15) 0%, transparent 50%);
            pointer-events: none;
            animation: gradientShift 15s ease infinite;
        }

        @keyframes gradientShift {
            0% { background-position: 0% 0%; }
            50% { background-position: 100% 100%; }
            100% { background-position: 0% 0%; }
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px 20px 40px;
            position: relative;
            z-index: 1;
        }

        .hero {
            text-align: center;
            padding: 60px 60px;
            background: var(--card-bg);
            border-radius: 40px;
            box-shadow: var(--shadow-lg);
            margin: 20px auto;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(20px);
            transform: translateY(0);
            transition: transform 0.3s ease;
            max-width: 1100px;
        }

        .hero:hover {
            transform: translateY(-5px);
        }

        .free-badge {
            position: absolute;
            top: 30px;
            right: 30px;
            background: var(--gradient-2);
            color: white;
            padding: 12px 35px;
            border-radius: 30px;
            font-weight: bold;
            box-shadow: var(--shadow-md);
            animation: float 3s ease-in-out infinite;
            z-index: 2;
            font-size: 1.1em;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        h1 {
            font-size: 3.8em;
            margin-bottom: 25px;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
            animation: fadeInUp 1s ease;
            line-height: 1.2;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .subtitle {
            font-size: 1.6em;
            color: var(--light-text);
            margin-bottom: 50px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
            animation: fadeInUp 1s ease 0.2s backwards;
        }

        .stats-container {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 35px;
            margin: 60px 0;
            padding: 0 40px;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .stat-item {
            text-align: center;
            padding: 45px 35px;
            background: var(--card-bg);
            border-radius: 30px;
            box-shadow: var(--shadow-md);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(79, 70, 229, 0.1);
            animation: fadeInUp 1s ease 0.4s backwards;
        }

        .stat-item:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: var(--shadow-lg);
        }

        .stat-number {
            font-size: 3.8em;
            font-weight: bold;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 15px;
            line-height: 1;
        }

        .stat-label {
            color: var(--light-text);
            font-size: 1.3em;
            font-weight: 500;
        }

        .features {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 45px;
            margin: 70px 0;
            padding: 0 40px;
            max-width: 1000px;
            margin-left: auto;
            margin-right: auto;
        }

        .feature-card {
            background: var(--card-bg);
            padding: 60px 45px;
            border-radius: 35px;
            text-align: center;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: var(--shadow-md);
            border: 1px solid rgba(79, 70, 229, 0.1);
            position: relative;
            overflow: hidden;
            animation: fadeInUp 1s ease 0.6s backwards;
        }

        .feature-card:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: var(--shadow-lg);
        }

        .feature-icon {
            font-size: 4em;
            margin-bottom: 35px;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }

        .feature-card h3 {
            font-size: 2em;
            color: var(--text-color);
            margin-bottom: 25px;
            font-weight: 700;
        }

        .feature-card p {
            color: var(--light-text);
            font-size: 1.3em;
            line-height: 1.8;
        }

        .testimonials {
            margin: 60px 0;
            padding: 50px 40px;
            background: rgba(79, 70, 229, 0.03);
            border-radius: 30px;
            position: relative;
            overflow: hidden;
        }

        .testimonials::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(244, 114, 182, 0.05) 100%);
            z-index: 0;
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            position: relative;
            z-index: 1;
            max-width: 1000px;
            margin: 0 auto;
        }

        .testimonial {
            background: var(--card-bg);
            padding: 35px 30px;
            border-radius: 25px;
            box-shadow: var(--shadow-md);
            position: relative;
            transition: all 0.3s ease;
            border: 1px solid rgba(79, 70, 229, 0.1);
            animation: fadeInUp 1s ease 0.8s backwards;
        }

        .testimonial:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .testimonial::before {
            content: '"';
            position: absolute;
            top: -15px;
            left: 20px;
            font-size: 6em;
            color: rgba(79, 70, 229, 0.1);
            font-family: Georgia, serif;
            line-height: 1;
        }

        .testimonial-content {
            font-size: 1.2em;
            color: var(--text-color);
            line-height: 1.8;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--light-text);
            font-size: 1.1em;
            font-weight: 500;
        }

        .testimonial-author::before {
            content: '';
            display: block;
            width: 3px;
            height: 20px;
            background: var(--gradient-1);
            border-radius: 3px;
        }

        .cta-section {
            margin: 50px 0;
            padding: 50px 40px;
            background: linear-gradient(135deg, #3498db, #2980b9);
            border-radius: 20px;
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(52, 152, 219, 0.3);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, rgba(255,255,255,0.1) 25%, transparent 25%),
                        linear-gradient(-45deg, rgba(255,255,255,0.1) 25%, transparent 25%);
            background-size: 20px 20px;
            opacity: 0.1;
        }

        .cta-button {
            display: inline-block;
            padding: 25px 70px;
            background: var(--gradient-2);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-size: 1.6em;
            font-weight: bold;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            margin: 40px auto;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
            border: 2px solid rgba(255, 255, 255, 0.3);
            animation: pulse 2s infinite;
        }

        .cta-button:hover {
            transform: scale(1.05);
            box-shadow: 0 20px 40px rgba(244, 114, 182, 0.4);
        }

        .cta-button::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent, rgba(255,255,255,0.3), transparent);
            transform: rotate(45deg);
            animation: shine 3s infinite;
        }

        @media (max-width: 768px) {
            .container {
                padding: 15px 15px 30px;
            }

            .hero {
                padding: 40px 20px;
                margin: 15px auto;
            }

            h1 {
                font-size: 2em;
            }

            .subtitle {
                font-size: 1.1em;
            }

            .stats-container {
                grid-template-columns: repeat(2, 1fr);
                gap: 15px;
                padding: 0 10px;
            }

            .stat-item {
                padding: 20px 15px;
            }

            .stat-number {
                font-size: 2em;
            }

            .stat-label {
                font-size: 0.9em;
            }

            .features {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
                padding: 0 10px;
            }

            .feature-card {
                padding: 30px 20px;
            }

            .feature-icon {
                font-size: 2.5em;
            }

            .feature-card h3 {
                font-size: 1.4em;
            }

            .feature-card p {
                font-size: 1em;
            }

            .cta-button {
                padding: 15px 30px;
                font-size: 1.2em;
                width: 90%;
            }

            .testimonials {
                margin: 40px 0;
                padding: 30px 20px;
                border-radius: 20px;
            }

            .testimonial-grid {
                gap: 20px;
            }

            .testimonial {
                padding: 25px 20px;
                border-radius: 20px;
            }

            .testimonial-content {
                font-size: 1.1em;
                margin-bottom: 15px;
            }

            .testimonial-author {
                font-size: 1em;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 10px 10px 20px;
            }

            .hero {
                padding: 30px 15px;
                margin: 10px auto;
            }

            h1 {
                font-size: 1.6em;
                margin-bottom: 15px;
            }

            .subtitle {
                font-size: 0.95em;
                margin-bottom: 25px;
            }

            .stats-container {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
                margin: 25px 0;
            }

            .stat-item {
                padding: 15px 10px;
                border-radius: 15px;
            }

            .stat-number {
                font-size: 1.6em;
                margin-bottom: 5px;
            }

            .stat-label {
                font-size: 0.8em;
            }

            .features {
                grid-template-columns: 1fr;
                gap: 15px;
                margin: 30px 0;
            }

            .feature-card {
                padding: 20px 15px;
                border-radius: 15px;
            }

            .feature-icon {
                font-size: 2em;
                margin-bottom: 15px;
            }

            .feature-card h3 {
                font-size: 1.2em;
                margin-bottom: 10px;
            }

            .feature-card p {
                font-size: 0.9em;
                line-height: 1.5;
            }

            .cta-button {
                padding: 12px 25px;
                font-size: 1.1em;
                width: 95%;
                margin: 20px auto;
            }

            .free-badge {
                position: static;
                display: inline-block;
                margin-bottom: 15px;
                padding: 8px 20px;
                font-size: 0.9em;
            }

            .testimonials {
                margin: 30px 0;
                padding: 20px 15px;
                border-radius: 15px;
            }

            .testimonial-grid {
                grid-template-columns: 1fr;
                gap: 15px;
            }

            .testimonial {
                padding: 20px 15px;
                border-radius: 15px;
            }

            .testimonial-content {
                font-size: 1em;
                line-height: 1.6;
                margin-bottom: 12px;
            }

            .testimonial-author {
                font-size: 0.9em;
            }

            .testimonial::before {
                font-size: 4em;
                top: -10px;
            }
        }

        @media (min-width: 1400px) {
            .container {
                padding: 30px 30px 50px;
            }

            .hero {
                padding: 80px 80px;
                margin: 25px auto;
            }

            h1 {
                font-size: 4.2em;
            }

            .subtitle {
                font-size: 1.8em;
            }

            .stats-container {
                max-width: 1100px;
            }

            .features {
                max-width: 1200px;
            }
        }