* {
            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: #f8f9fa;
        }

        /* 导航栏样式 */
        .gcs5s-navbar-wrapper {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            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;
        }

        .gcs5s-logo-img {
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            padding: 5px;
        }

        .gcs5s-logo-text {
            color: white;
            font-size: 18px;
            font-weight: 600;
        }

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

        .gcs5s-nav-link {
            color: white;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 5px 10px;
            border-radius: 4px;
        }

        .gcs5s-nav-link:hover {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

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

        .gcs5s-hero-section::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            top: -100px;
            right: -100px;
        }

        .gcs5s-hero-section::after {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            bottom: -50px;
            left: -50px;
        }

        .gcs5s-hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .gcs5s-hero-title {
            font-size: 48px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .gcs5s-hero-subtitle {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.95;
            line-height: 1.8;
        }

        .gcs5s-hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .gcs5s-btn-primary {
            background-color: #ff6b6b;
            color: white;
            padding: 15px 40px;
            border: none;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
            text-decoration: none;
            display: inline-block;
        }

        .gcs5s-btn-primary:hover {
            background-color: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
        }

        .gcs5s-btn-secondary {
            background-color: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 15px 40px;
            border: 2px solid white;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .gcs5s-btn-secondary:hover {
            background-color: white;
            color: #667eea;
            transform: translateY(-2px);
        }

        /* 主内容区 */
        .gcs5s-main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 20px;
        }

        .gcs5s-section-title {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 40px;
            color: #333;
            text-align: center;
            position: relative;
            padding-bottom: 20px;
        }

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

        /* 功能特性网格 */
        .gcs5s-features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }

        .gcs5s-feature-card {
            background: white;
            padding: 40px 30px;
            border-radius: 12px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            text-align: center;
        }

        .gcs5s-feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
        }

        .gcs5s-feature-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin: 0 auto 20px;
            color: white;
        }

        .gcs5s-feature-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #333;
        }

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

        /* 更新日志部分 */
        .gcs5s-changelog-section {
            background: white;
            padding: 60px;
            border-radius: 12px;
            margin-bottom: 60px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .gcs5s-changelog-list {
            list-style: none;
        }

        .gcs5s-changelog-item {
            padding: 20px 0;
            border-bottom: 1px solid #e5e7eb;
            display: flex;
            gap: 20px;
        }

        .gcs5s-changelog-item:last-child {
            border-bottom: none;
        }

        .gcs5s-changelog-badge {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            white-space: nowrap;
            height: fit-content;
        }

        .gcs5s-changelog-content h4 {
            font-size: 16px;
            color: #333;
            margin-bottom: 8px;
        }

        .gcs5s-changelog-content p {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* 版本对比表 */
        .gcs5s-comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 60px;
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

        .gcs5s-comparison-table th {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 20px;
            text-align: left;
            font-weight: 600;
            font-size: 14px;
        }

        .gcs5s-comparison-table td {
            padding: 18px 20px;
            border-bottom: 1px solid #e5e7eb;
            font-size: 14px;
        }

        .gcs5s-comparison-table tr:last-child td {
            border-bottom: none;
        }

        .gcs5s-comparison-table tr:nth-child(even) {
            background-color: #f8f9fa;
        }

        .gcs5s-checkmark {
            color: #10b981;
            font-weight: 600;
        }

        .gcs5s-xmark {
            color: #ef4444;
            font-weight: 600;
        }

        /* CTA区域 */
        .gcs5s-cta-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 80px 40px;
            text-align: center;
            border-radius: 12px;
            margin-bottom: 60px;
        }

        .gcs5s-cta-title {
            font-size: 42px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .gcs5s-cta-desc {
            font-size: 18px;
            margin-bottom: 40px;
            opacity: 0.95;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .gcs5s-cta-button {
            background-color: #ff6b6b;
            color: white;
            padding: 18px 50px;
            border: none;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
            display: inline-block;
        }

        .gcs5s-cta-button:hover {
            background-color: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 107, 0.6);
        }

        /* 系统要求部分 */
        .gcs5s-requirements-section {
            background: white;
            padding: 60px;
            border-radius: 12px;
            margin-bottom: 60px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
        }

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

        .gcs5s-requirement-item {
            padding: 20px;
            background: #f8f9fa;
            border-left: 4px solid #667eea;
            border-radius: 8px;
        }

        .gcs5s-requirement-item h4 {
            font-size: 16px;
            color: #333;
            margin-bottom: 10px;
        }

        .gcs5s-requirement-item p {
            font-size: 14px;
            color: #666;
            line-height: 1.6;
        }

        /* 页脚 */
        .gcs5s-footer-wrapper {
            background-color: #2d3748;
            color: white;
            padding: 60px 20px 20px;
            margin-top: 80px;
        }

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

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

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

        .gcs5s-footer-column ul {
            list-style: none;
        }

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

        .gcs5s-footer-column a {
            color: #cbd5e0;
            text-decoration: none;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .gcs5s-footer-column a:hover {
            color: white;
            padding-left: 5px;
        }

        .gcs5s-footer-divider {
            border-top: 1px solid #4a5568;
            padding-top: 20px;
            text-align: center;
            color: #a0aec0;
            font-size: 14px;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .gcs5s-hero-title {
                font-size: 32px;
            }

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

            .gcs5s-hero-buttons {
                flex-direction: column;
                align-items: center;
            }

            .gcs5s-btn-primary, .gcs5s-btn-secondary {
                width: 100%;
                max-width: 300px;
            }

            .gcs5s-nav-menu {
                gap: 15px;
            }

            .gcs5s-nav-link {
                font-size: 13px;
            }

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

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

            .gcs5s-changelog-section {
                padding: 40px 20px;
            }

            .gcs5s-requirements-section {
                padding: 40px 20px;
            }

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

            .gcs5s-comparison-table {
                font-size: 12px;
            }

            .gcs5s-comparison-table th,
            .gcs5s-comparison-table td {
                padding: 12px 10px;
            }

            .gcs5s-cta-section {
                padding: 50px 20px;
            }

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

        @media (max-width: 480px) {
            .gcs5s-navbar-container {
                height: auto;
                padding: 15px 20px;
                flex-direction: column;
                gap: 15px;
            }

            .gcs5s-nav-menu {
                flex-direction: column;
                gap: 10px;
                width: 100%;
            }

            .gcs5s-nav-link {
                display: block;
                padding: 10px;
                text-align: center;
            }

            .gcs5s-hero-section {
                padding: 50px 20px;
            }

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

            .gcs5s-hero-subtitle {
                font-size: 14px;
                margin-bottom: 30px;
            }

            .gcs5s-main-container {
                padding: 40px 20px;
            }

            .gcs5s-changelog-item {
                flex-direction: column;
                gap: 10px;
            }
        }