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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        /* 导航栏 */
        .fbcw-navbar {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

        .fbcw-logo {
            font-size: 24px;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .fbcw-logo img {
            height: 40px;
            width: 40px;
            background: white;
            border-radius: 5px;
            padding: 5px;
        }

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

        .fbcw-nav-link {
            color: white;
            font-size: 14px;
            font-weight: 500;
            transition: opacity 0.3s ease;
            cursor: pointer;
        }

        .fbcw-nav-link:hover {
            opacity: 0.8;
            text-decoration: underline;
        }

        /* 主横幅 */
        .fbcw-banner {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 60px 0;
            text-align: center;
        }

        .fbcw-banner-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 30px;
        }

        .fbcw-banner-title {
            font-size: 48px;
            font-weight: bold;
            line-height: 1.2;
            max-width: 800px;
        }

        .fbcw-banner-subtitle {
            font-size: 20px;
            opacity: 0.95;
            max-width: 700px;
        }

        .fbcw-banner-badges {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .fbcw-badge {
            background: rgba(255, 255, 255, 0.2);
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 13px;
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

        /* 下载区域 */
        .fbcw-download-section {
            background: white;
            padding: 50px 0;
        }

        .fbcw-download-title {
            font-size: 32px;
            font-weight: bold;
            margin-bottom: 40px;
            text-align: center;
            color: #333;
        }

        .fbcw-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }

        .fbcw-download-card {
            background: white;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .fbcw-download-card:hover {
            border-color: #667eea;
            box-shadow: 0 8px 20px rgba(102, 126, 234, 0.15);
            transform: translateY(-5px);
        }

        .fbcw-platform-icon {
            font-size: 48px;
            margin-bottom: 15px;
            color: #667eea;
        }

        .fbcw-platform-name {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 10px;
            color: #333;
        }

        .fbcw-version-info {
            font-size: 12px;
            color: #999;
            margin-bottom: 15px;
        }

        .fbcw-file-size {
            font-size: 13px;
            color: #666;
            margin-bottom: 20px;
        }

        .fbcw-download-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 5px;
            font-size: 14px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 100%;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
        }

        .fbcw-download-btn:hover {
            transform: scale(1.02);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
        }

        .fbcw-download-btn:active {
            transform: scale(0.98);
        }

        /* 要求区域 */
        .fbcw-requirements-section {
            background: #f5f5f5;
            padding: 50px 0;
        }

        .fbcw-requirements-title {
            font-size: 28px;
            font-weight: bold;
            margin-bottom: 30px;
            text-align: center;
            color: #333;
        }

        .fbcw-requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .fbcw-requirement-item {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .fbcw-requirement-label {
            font-size: 14px;
            font-weight: bold;
            color: #667eea;
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .fbcw-requirement-text {
            font-size: 15px;
            color: #666;
            line-height: 1.8;
        }

        /* 功能特性 */
        .fbcw-features-section {
            background: white;
            padding: 50px 0;
        }

        .fbcw-features-title {
            font-size: 28px;
            font-weight: bold;
            margin-bottom: 30px;
            text-align: center;
            color: #333;
        }

        .fbcw-features-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .fbcw-feature-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .fbcw-feature-check {
            color: #667eea;
            font-weight: bold;
            font-size: 18px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .fbcw-feature-text {
            color: #666;
            font-size: 14px;
            line-height: 1.6;
        }

        /* CTA区域 */
        .fbcw-cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 60px 0;
            text-align: center;
        }

        .fbcw-cta-title {
            font-size: 32px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .fbcw-cta-text {
            font-size: 16px;
            margin-bottom: 30px;
            opacity: 0.95;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .fbcw-cta-btn {
            background: white;
            color: #667eea;
            border: none;
            padding: 15px 40px;
            border-radius: 5px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .fbcw-cta-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        /* 页脚 */
        .fbcw-footer {
            background: #2c3e50;
            color: white;
            padding: 40px 0 20px;
            font-size: 14px;
        }

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

        .fbcw-footer-section {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .fbcw-footer-title {
            font-weight: bold;
            font-size: 16px;
            margin-bottom: 15px;
            color: #667eea;
        }

        .fbcw-footer-link {
            color: #bbb;
            transition: color 0.3s ease;
            cursor: pointer;
        }

        .fbcw-footer-link:hover {
            color: #667eea;
        }

        .fbcw-footer-bottom {
            border-top: 1px solid #444;
            padding-top: 20px;
            text-align: center;
            color: #999;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .fbcw-nav-menu {
                gap: 15px;
                font-size: 12px;
            }

            .fbcw-banner-title {
                font-size: 32px;
            }

            .fbcw-banner-subtitle {
                font-size: 16px;
            }

            .fbcw-download-title {
                font-size: 24px;
            }

            .fbcw-requirements-title {
                font-size: 22px;
            }

            .fbcw-features-title {
                font-size: 22px;
            }

            .fbcw-cta-title {
                font-size: 24px;
            }

            .fbcw-navbar-content {
                flex-direction: column;
                gap: 15px;
            }

            .fbcw-nav-menu {
                flex-direction: column;
                gap: 10px;
                width: 100%;
                text-align: center;
            }

            .fbcw-banner {
                padding: 40px 0;
            }

            .fbcw-download-grid {
                grid-template-columns: 1fr;
            }

            .fbcw-requirements-grid {
                grid-template-columns: 1fr;
            }

            .fbcw-features-list {
                grid-template-columns: 1fr;
            }
        }

        /* 安全认证徽章 */
        .fbcw-security-badge {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin: 30px 0;
            flex-wrap: wrap;
        }

        .fbcw-badge-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: #666;
        }

        .fbcw-badge-icon {
            font-size: 24px;
            color: #667eea;
        }

        /* H1标签样式 */
        h1 {
            font-size: 36px;
            font-weight: bold;
            color: #333;
            margin-bottom: 15px;
        }

        h2 {
            font-size: 24px;
            font-weight: bold;
            color: #333;
            margin-bottom: 20px;
        }

        p {
            margin-bottom: 15px;
            color: #666;
            line-height: 1.8;
        }