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

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

        /* 导航栏 */
        .ickfu-navbar-wrapper {
            background: linear-gradient(135deg, #0088cc 0%, #006ba3 100%);
            padding: 0;
            box-shadow: 0 2px 8px rgba(0, 136, 204, 0.15);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .ickfu-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .ickfu-navbar-logo {
            display: flex;
            align-items: center;
            font-size: 24px;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }

        .ickfu-navbar-logo img {
            height: 45px;
            margin-right: 12px;
            width: auto;
        }

        .ickfu-navbar-menu {
            display: flex;
            gap: 30px;
            list-style: none;
        }

        .ickfu-nav-link {
            color: white;
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 8px 0;
            border-bottom: 2px solid transparent;
        }

        .ickfu-nav-link:hover {
            border-bottom-color: white;
            opacity: 0.9;
        }

        /* 主容器 */
        .ickfu-main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 英雄区域 */
        .ickfu-hero-section {
            background: linear-gradient(135deg, #0088cc 0%, #006ba3 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
            margin-bottom: 60px;
        }

        .ickfu-hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .ickfu-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .ickfu-hero-subtitle {
            font-size: 20px;
            margin-bottom: 30px;
            opacity: 0.95;
            line-height: 1.5;
        }

        .ickfu-hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            margin-bottom: 20px;
        }

        /* CTA按钮组 */
        .ickfu-cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 40px;
        }

        .ickfu-btn-primary {
            background: white;
            color: #0088cc;
            padding: 16px 40px;
            font-size: 18px;
            font-weight: 600;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .ickfu-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        .ickfu-btn-secondary {
            background: transparent;
            color: white;
            padding: 16px 40px;
            font-size: 18px;
            font-weight: 600;
            border: 2px solid white;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .ickfu-btn-secondary:hover {
            background: white;
            color: #0088cc;
        }

        /* 下载信息区 */
        .ickfu-download-info {
            background: white;
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 60px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .ickfu-info-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 30px;
            color: #0088cc;
        }

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

        .ickfu-info-card {
            padding: 20px;
            background: #f5f7fa;
            border-radius: 8px;
            border-left: 4px solid #0088cc;
        }

        .ickfu-info-card-title {
            font-size: 16px;
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 10px;
        }

        .ickfu-info-card-content {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* 平台下载区 */
        .ickfu-platform-section {
            background: white;
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 60px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .ickfu-platform-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 30px;
            color: #333;
        }

        .ickfu-platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 25px;
        }

        .ickfu-platform-card {
            padding: 30px;
            background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
            border-radius: 8px;
            text-align: center;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .ickfu-platform-card:hover {
            border-color: #0088cc;
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 136, 204, 0.15);
        }

        .ickfu-platform-icon {
            font-size: 48px;
            margin-bottom: 15px;
        }

        .ickfu-platform-name {
            font-size: 18px;
            font-weight: 600;
            color: #333;
            margin-bottom: 10px;
        }

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

        .ickfu-platform-btn {
            background: #0088cc;
            color: white;
            padding: 12px 24px;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 14px;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .ickfu-platform-btn:hover {
            background: #006ba3;
            transform: scale(1.05);
        }

        /* 特性区 */
        .ickfu-features-section {
            background: white;
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 60px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .ickfu-features-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 30px;
            color: #333;
        }

        .ickfu-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }

        .ickfu-feature-item {
            padding: 25px;
            background: #f9f9f9;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .ickfu-feature-item:hover {
            background: #f0f4f8;
            transform: translateY(-3px);
        }

        .ickfu-feature-icon {
            font-size: 32px;
            margin-bottom: 12px;
        }

        .ickfu-feature-name {
            font-size: 18px;
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 10px;
        }

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

        /* 安全保证区 */
        .ickfu-security-section {
            background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 60px;
        }

        .ickfu-security-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 30px;
            color: #333;
            text-align: center;
        }

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

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

        .ickfu-security-item-title {
            font-size: 16px;
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 12px;
        }

        .ickfu-security-item-text {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* FAQ区 */
        .ickfu-faq-section {
            background: white;
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 60px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .ickfu-faq-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 30px;
            color: #333;
        }

        .ickfu-faq-item {
            margin-bottom: 20px;
            border-bottom: 1px solid #e8e8e8;
            padding-bottom: 20px;
        }

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

        .ickfu-faq-question {
            font-size: 16px;
            font-weight: 600;
            color: #0088cc;
            margin-bottom: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .ickfu-faq-question:hover {
            color: #006ba3;
        }

        .ickfu-faq-answer {
            font-size: 14px;
            color: #666;
            line-height: 1.8;
        }

        /* 页脚 */
        .ickfu-footer-wrapper {
            background: #2c3e50;
            color: #bdc3c7;
            padding: 50px 20px 30px;
            margin-top: 80px;
        }

        .ickfu-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

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

        .ickfu-footer-section-title {
            color: white;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .ickfu-footer-link {
            display: block;
            color: #bdc3c7;
            text-decoration: none;
            font-size: 14px;
            margin-bottom: 10px;
            transition: all 0.3s ease;
        }

        .ickfu-footer-link:hover {
            color: white;
            padding-left: 5px;
        }

        .ickfu-footer-divider {
            border-top: 1px solid #34495e;
            padding-top: 30px;
            text-align: center;
            font-size: 14px;
            color: #7f8c8d;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .ickfu-navbar-menu {
                gap: 15px;
            }

            .ickfu-nav-link {
                font-size: 13px;
            }

            .ickfu-hero-title {
                font-size: 32px;
            }

            .ickfu-hero-subtitle {
                font-size: 16px;
            }

            .ickfu-cta-buttons {
                flex-direction: column;
            }

            .ickfu-btn-primary,
            .ickfu-btn-secondary {
                width: 100%;
            }

            .ickfu-info-title,
            .ickfu-platform-title,
            .ickfu-features-title,
            .ickfu-faq-title,
            .ickfu-security-title {
                font-size: 24px;
            }

            .ickfu-download-info,
            .ickfu-platform-section,
            .ickfu-features-section,
            .ickfu-faq-section,
            .ickfu-security-section {
                padding: 25px;
            }
        }

        @media (max-width: 480px) {
            .ickfu-navbar-container {
                height: 60px;
            }

            .ickfu-navbar-logo {
                font-size: 18px;
            }

            .ickfu-navbar-logo img {
                height: 35px;
            }

            .ickfu-navbar-menu {
                gap: 10px;
            }

            .ickfu-nav-link {
                font-size: 12px;
            }

            .ickfu-hero-section {
                padding: 50px 20px;
            }

            .ickfu-hero-title {
                font-size: 24px;
            }

            .ickfu-hero-subtitle {
                font-size: 14px;
            }

            .ickfu-btn-primary,
            .ickfu-btn-secondary {
                padding: 12px 24px;
                font-size: 16px;
            }
        }