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

        html, body {
            width: 100%;
            height: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
        }

        /* 导航栏样式 */
        .gcs5s-navbar-wrapper {
            position: sticky;
            top: 0;
            width: 100%;
            background: linear-gradient(135deg, #ffffff 0%, #f9f9f9 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            z-index: 1000;
        }

        .gcs5s-navbar-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .gcs5s-logo-section {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: #333;
        }

        .gcs5s-logo-img {
            width: 40px;
            height: 40px;
            object-fit: contain;
        }

        .gcs5s-logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #1976d2;
            letter-spacing: 1px;
        }

        .gcs5s-nav-menu {
            display: flex;
            gap: 30px;
            list-style: none;
        }

        .gcs5s-nav-link {
            text-decoration: none;
            color: #555;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease, border-bottom 0.3s ease;
            padding-bottom: 5px;
            border-bottom: 2px solid transparent;
        }

        .gcs5s-nav-link:hover,
        .gcs5s-nav-link.active {
            color: #1976d2;
            border-bottom-color: #1976d2;
        }

        /* 顶部轮播/Hero区域 */
        .gcs5s-hero-section {
            width: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .gcs5s-hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .gcs5s-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        .gcs5s-hero-subtitle {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.95;
            font-weight: 300;
        }

        .gcs5s-hero-cta {
            display: inline-block;
            padding: 15px 50px;
            background-color: #ff6b6b;
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
        }

        .gcs5s-hero-cta:hover {
            background-color: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
        }

        .gcs5s-hero-bg-decoration {
            position: absolute;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            top: -100px;
            right: -100px;
            z-index: 1;
        }

        /* 特性区域 */
        .gcs5s-features-section {
            max-width: 1200px;
            margin: 80px auto;
            padding: 0 20px;
        }

        .gcs5s-section-title {
            text-align: center;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 50px;
            color: #333;
            position: relative;
            padding-bottom: 20px;
        }

        .gcs5s-section-title::after {
            content: '';
            position: absolute;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }

        .gcs5s-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 40px;
        }

        .gcs5s-feature-card {
            background: white;
            padding: 40px 30px;
            border-radius: 8px;
            text-align: center;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
            transition: all 0.3s ease;
            border-top: 4px solid #667eea;
        }

        .gcs5s-feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }

        .gcs5s-feature-icon {
            font-size: 48px;
            margin-bottom: 20px;
            display: inline-block;
        }

        .gcs5s-feature-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }

        .gcs5s-feature-desc {
            font-size: 14px;
            color: #666;
            line-height: 1.8;
        }

        /* 下载区域 */
        .gcs5s-download-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 60px 20px;
            margin: 80px 0;
        }

        .gcs5s-download-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .gcs5s-download-title {
            text-align: center;
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 50px;
        }

        .gcs5s-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }

        .gcs5s-download-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 40px 30px;
            border-radius: 8px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.3s ease;
        }

        .gcs5s-download-card:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-5px);
        }

        .gcs5s-download-os {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .gcs5s-download-version {
            font-size: 13px;
            opacity: 0.85;
            margin-bottom: 25px;
        }

        .gcs5s-download-btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: #ff6b6b;
            color: white;
            text-decoration: none;
            border-radius: 25px;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .gcs5s-download-btn:hover {
            background-color: #ff5252;
            transform: scale(1.05);
        }

        /* 关于区域 */
        .gcs5s-about-section {
            max-width: 1200px;
            margin: 80px auto;
            padding: 0 20px;
        }

        .gcs5s-about-content {
            background: white;
            padding: 60px 40px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
            line-height: 1.9;
        }

        .gcs5s-about-heading {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 30px;
            color: #333;
        }

        .gcs5s-about-text {
            font-size: 16px;
            color: #666;
            margin-bottom: 20px;
            text-align: justify;
        }

        .gcs5s-about-highlights {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 40px;
            padding-top: 40px;
            border-top: 1px solid #e0e0e0;
        }

        .gcs5s-highlight-item {
            padding: 20px;
            background: #f5f5f5;
            border-radius: 6px;
            text-align: center;
        }

        .gcs5s-highlight-number {
            font-size: 32px;
            font-weight: 700;
            color: #667eea;
            margin-bottom: 10px;
        }

        .gcs5s-highlight-text {
            font-size: 14px;
            color: #666;
        }

        /* CTA区域 */
        .gcs5s-cta-section {
            background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .gcs5s-cta-content {
            max-width: 700px;
            margin: 0 auto;
        }

        .gcs5s-cta-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .gcs5s-cta-desc {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.95;
        }

        .gcs5s-cta-button {
            display: inline-block;
            padding: 16px 60px;
            background-color: white;
            color: #f5576c;
            text-decoration: none;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 700;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .gcs5s-cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }

        /* 页脚 */
        .gcs5s-footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 60px 20px 30px;
            margin-top: 80px;
        }

        .gcs5s-footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .gcs5s-footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .gcs5s-footer-section h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            color: white;
        }

        .gcs5s-footer-links {
            list-style: none;
        }

        .gcs5s-footer-links li {
            margin-bottom: 12px;
        }

        .gcs5s-footer-link {
            color: #bdc3c7;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .gcs5s-footer-link:hover {
            color: #1976d2;
        }

        .gcs5s-footer-divider {
            border-top: 1px solid #34495e;
            padding-top: 30px;
        }

        .gcs5s-footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: #95a5a6;
        }

        .gcs5s-footer-copyright {
            text-align: center;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .gcs5s-navbar-container {
                height: auto;
                flex-direction: column;
                padding: 15px 20px;
                gap: 20px;
            }

            .gcs5s-nav-menu {
                flex-direction: column;
                gap: 15px;
                text-align: center;
            }

            .gcs5s-hero-title {
                font-size: 32px;
            }

            .gcs5s-hero-subtitle {
                font-size: 16px;
            }

            .gcs5s-section-title {
                font-size: 24px;
            }

            .gcs5s-features-grid {
                grid-template-columns: 1fr;
            }

            .gcs5s-download-grid {
                grid-template-columns: 1fr;
            }

            .gcs5s-about-content {
                padding: 30px 20px;
            }

            .gcs5s-cta-title {
                font-size: 28px;
            }

            .gcs5s-footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .gcs5s-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            .gcs5s-nav-menu {
                gap: 10px;
            }

            .gcs5s-hero-title {
                font-size: 24px;
            }

            .gcs5s-hero-cta {
                padding: 12px 30px;
                font-size: 14px;
            }

            .gcs5s-feature-card {
                padding: 25px 20px;
            }

            .gcs5s-download-title {
                font-size: 24px;
            }
        }