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

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

        .l7wf-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .l7wf-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .l7wf-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }

        .l7wf-logo img {
            height: 40px;
            width: auto;
        }

        .l7wf-nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }

        .l7wf-nav-link {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }

        .l7wf-nav-link:hover {
            color: #667eea;
        }

        .l7wf-nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 0;
            background: #667eea;
            transition: width 0.3s ease;
        }

        .l7wf-nav-link:hover::after {
            width: 100%;
        }

        .l7wf-main {
            background: white;
            margin: 0;
        }

        .l7wf-hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }

        .l7wf-hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .l7wf-hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

        .l7wf-download-section {
            background: white;
            padding: 60px 0;
        }

        .l7wf-download-card {
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
            padding: 50px;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
            border: 1px solid #f0f0f0;
        }

        .l7wf-download-icon {
            width: 120px;
            height: 120px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 25px;
            margin: 0 auto 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 60px;
            color: white;
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
        }

        .l7wf-download-title {
            font-size: 2.5rem;
            color: #333;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .l7wf-download-desc {
            font-size: 1.1rem;
            color: #666;
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .l7wf-download-btn {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            padding: 18px 50px;
            border: none;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
            margin-bottom: 30px;
        }

        .l7wf-download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(102, 126, 234, 0.6);
        }

        .l7wf-version-info {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 40px;
            padding: 30px;
            background: #f8f9ff;
            border-radius: 15px;
        }

        .l7wf-info-item {
            text-align: center;
        }

        .l7wf-info-label {
            font-weight: 600;
            color: #667eea;
            margin-bottom: 5px;
        }

        .l7wf-info-value {
            color: #333;
            font-size: 1.1rem;
        }

        .l7wf-features {
            background: #f8f9ff;
            padding: 80px 0;
        }

        .l7wf-section-title {
            text-align: center;
            font-size: 2.5rem;
            color: #333;
            margin-bottom: 50px;
            font-weight: 700;
        }

        .l7wf-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .l7wf-feature-card {
            background: white;
            padding: 40px 30px;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }

        .l7wf-feature-card:hover {
            transform: translateY(-10px);
        }

        .l7wf-feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 50%;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 35px;
            color: white;
        }

        .l7wf-feature-title {
            font-size: 1.4rem;
            color: #333;
            margin-bottom: 15px;
            font-weight: 600;
        }

        .l7wf-feature-desc {
            color: #666;
            line-height: 1.6;
        }

        .l7wf-cta {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
        }

        .l7wf-cta-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .l7wf-cta-desc {
            font-size: 1.2rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

        .l7wf-cta-btn {
            background: white;
            color: #667eea;
            padding: 18px 50px;
            border: none;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }

        .l7wf-cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
        }

        .l7wf-footer {
            background: #2c3e50;
            color: white;
            padding: 50px 0 30px;
        }

        .l7wf-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }

        .l7wf-footer-section h3 {
            margin-bottom: 20px;
            color: #667eea;
        }

        .l7wf-footer-section p,
        .l7wf-footer-section a {
            color: #bdc3c7;
            text-decoration: none;
            line-height: 1.8;
        }

        .l7wf-footer-section a:hover {
            color: white;
        }

        .l7wf-footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #34495e;
            color: #95a5a6;
        }

        @media (max-width: 768px) {
            .l7wf-nav-menu {
                display: none;
            }

            .l7wf-hero-title {
                font-size: 2.5rem;
            }

            .l7wf-download-card {
                padding: 30px 20px;
            }

            .l7wf-download-title {
                font-size: 2rem;
            }

            .l7wf-version-info {
                grid-template-columns: 1fr;
            }
        }