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

        html {
            scroll-behavior: smooth;
        }

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

        /* ===== 导航栏 ===== */
        .gcs5s-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            background: #fff;
            border-bottom: 1px solid #e8e8e8;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 40px;
            z-index: 1000;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }

        .gcs5s-logo img {
            height: 40px;
            width: auto;
        }

        .gcs5s-navlinks {
            display: flex;
            gap: 35px;
            align-items: center;
        }

        .gcs5s-navlinks a {
            text-decoration: none;
            color: #666;
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .gcs5s-navlinks a:hover,
        .gcs5s-navlinks a.active {
            color: #0084ff;
        }

        .gcs5s-navlinks a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            right: 0;
            height: 3px;
            background: #0084ff;
            border-radius: 2px;
        }

        .gcs5s-dlbtn {
            background: linear-gradient(135deg, #0084ff 0%, #0066cc 100%);
            color: white;
            padding: 10px 20px;
            border-radius: 20px;
            text-decoration: none;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .gcs5s-dlbtn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(0, 132, 255, 0.3);
        }

        /* ===== 页面顶部区域 ===== */
        .gcs5s-pageheader {
            margin-top: 70px;
            padding: 60px 40px;
            background: linear-gradient(135deg, #f5f7ff 0%, #f0f4ff 100%);
            border-bottom: 1px solid #e8e8e8;
        }

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

        .gcs5s-breadcrumb {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
            font-size: 14px;
        }

        .gcs5s-breadcrumb a {
            color: #0084ff;
            text-decoration: none;
        }

        .gcs5s-breadcrumb a:hover {
            text-decoration: underline;
        }

        .gcs5s-breadcrumb span {
            color: #999;
        }

        .gcs5s-pagetitle {
            font-size: 42px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 12px;
        }

        .gcs5s-pagesubtitle {
            font-size: 16px;
            color: #666;
            max-width: 600px;
        }

        /* ===== 功能分类导航 ===== */
        .gcs5s-featurenav {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px;
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .gcs5s-navbtn {
            padding: 12px 24px;
            border: 2px solid #e8e8e8;
            background: white;
            border-radius: 25px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            color: #666;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .gcs5s-navbtn:hover,
        .gcs5s-navbtn.active {
            border-color: #0084ff;
            color: #0084ff;
            background: #f0f8ff;
        }

        /* ===== 核心功能网格 ===== */
        .gcs5s-featuregrid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 40px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
        }

        .gcs5s-featurecard {
            background: white;
            border: 1px solid #e8e8e8;
            border-radius: 12px;
            padding: 40px 30px;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .gcs5s-featurecard:hover {
            border-color: #0084ff;
            box-shadow: 0 12px 32px rgba(0, 132, 255, 0.12);
            transform: translateY(-4px);
        }

        .gcs5s-featureicon {
            font-size: 48px;
            margin-bottom: 16px;
        }

        .gcs5s-featurename {
            font-size: 20px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 12px;
        }

        .gcs5s-featuredesc {
            font-size: 15px;
            color: #666;
            line-height: 1.8;
        }

        /* ===== 功能对比表格 ===== */
        .gcs5s-comparesection {
            max-width: 1200px;
            margin: 60px auto 0;
            padding: 60px 40px;
            border-top: 1px solid #e8e8e8;
        }

        .gcs5s-comparetitle {
            font-size: 32px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 40px;
            text-align: center;
        }

        .gcs5s-comparetable {
            width: 100%;
            border-collapse: collapse;
            background: white;
            border: 1px solid #e8e8e8;
            border-radius: 8px;
            overflow: hidden;
        }

        .gcs5s-comparetable th {
            background: #f5f7ff;
            padding: 20px;
            text-align: left;
            font-weight: 700;
            color: #1a1a1a;
            border-bottom: 2px solid #e8e8e8;
        }

        .gcs5s-comparetable td {
            padding: 18px 20px;
            border-bottom: 1px solid #e8e8e8;
        }

        .gcs5s-comparetable tbody tr:last-child td {
            border-bottom: none;
        }

        .gcs5s-comparetable tbody tr:hover {
            background: #f9f9f9;
        }

        .gcs5s-checkmark {
            color: #28a745;
            font-weight: 700;
        }

        .gcs5s-xmark {
            color: #dc3545;
            font-weight: 700;
        }

        /* ===== 技术优势部分 ===== */
        .gcs5s-techsection {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 40px;
            border-top: 1px solid #e8e8e8;
        }

        .gcs5s-sectiontitle {
            font-size: 32px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 10px;
            text-align: center;
        }

        .gcs5s-sectiondesc {
            text-align: center;
            color: #666;
            margin-bottom: 40px;
            font-size: 15px;
        }

        .gcs5s-techgrid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .gcs5s-techitem {
            background: linear-gradient(135deg, #f5f7ff 0%, #f0f4ff 100%);
            border: 1px solid #e8e8e8;
            border-radius: 12px;
            padding: 30px;
            transition: all 0.3s ease;
        }

        .gcs5s-techitem:hover {
            border-color: #0084ff;
            box-shadow: 0 12px 32px rgba(0, 132, 255, 0.12);
        }

        .gcs5s-techtitle {
            font-size: 18px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 12px;
        }

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

        /* ===== 应用场景部分 ===== */
        .gcs5s-scenariosection {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 40px;
            border-top: 1px solid #e8e8e8;
        }

        .gcs5s-scenariogrid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .gcs5s-scenariocard {
            background: white;
            border: 2px solid #f0f0f0;
            border-radius: 12px;
            padding: 30px;
            transition: all 0.3s ease;
        }

        .gcs5s-scenariocard:hover {
            border-color: #0084ff;
            box-shadow: 0 12px 32px rgba(0, 132, 255, 0.12);
            transform: translateY(-4px);
        }

        .gcs5s-scenarioicon {
            font-size: 40px;
            margin-bottom: 16px;
        }

        .gcs5s-scenariotitle {
            font-size: 18px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 12px;
        }

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

        /* ===== 功能详情部分 ===== */
        .gcs5s-detailsection {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 40px;
            border-top: 1px solid #e8e8e8;
        }

        .gcs5s-detailitem {
            margin-bottom: 50px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .gcs5s-detailitem:nth-child(even) {
            direction: rtl;
        }

        .gcs5s-detailitem:nth-child(even) > * {
            direction: ltr;
        }

        .gcs5s-detailcontent h3 {
            font-size: 24px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 16px;
        }

        .gcs5s-detailcontent p {
            font-size: 15px;
            color: #666;
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .gcs5s-detailcontent ul {
            list-style: none;
            margin-top: 16px;
        }

        .gcs5s-detailcontent li {
            font-size: 15px;
            color: #666;
            padding-left: 24px;
            position: relative;
            margin-bottom: 10px;
        }

        .gcs5s-detailcontent li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: #0084ff;
            font-weight: 700;
        }

        .gcs5s-detailimage {
            background: #f5f7ff;
            border-radius: 12px;
            overflow: hidden;
            min-height: 300px;
        }

        .gcs5s-detailimage img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .gcs5s-detailitem,
            .gcs5s-detailitem:nth-child(even) {
                grid-template-columns: 1fr;
                gap: 25px;
                direction: ltr;
            }

            .gcs5s-detailitem:nth-child(even) > * {
                direction: ltr;
            }

            .gcs5s-navbar {
                padding: 0 20px;
            }

            .gcs5s-pageheader {
                padding: 40px 20px;
            }

            .gcs5s-pagetitle {
                font-size: 28px;
            }

            .gcs5s-featuregrid {
                padding: 40px 20px;
                grid-template-columns: 1fr;
            }

            .gcs5s-comparetable {
                font-size: 14px;
            }

            .gcs5s-comparetable th,
            .gcs5s-comparetable td {
                padding: 12px;
            }

            .gcs5s-featurenav {
                padding: 20px;
                gap: 10px;
            }

            .gcs5s-navbtn {
                padding: 10px 16px;
                font-size: 13px;
            }
        }

        /* ===== 页脚 ===== */
        .gcs5s-footer {
            background: #1a1a1a;
            color: #999;
            padding: 50px 40px 30px;
            margin-top: 60px;
            border-top: 1px solid #333;
        }

        .gcs5s-footercontent {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .gcs5s-footersection h4 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 14px;
            font-weight: 700;
        }

        .gcs5s-footersection ul {
            list-style: none;
        }

        .gcs5s-footersection li {
            margin-bottom: 10px;
        }

        .gcs5s-footersection a {
            color: #999;
            text-decoration: none;
            font-size: 13px;
            transition: color 0.3s ease;
        }

        .gcs5s-footersection a:hover {
            color: #0084ff;
        }

        .gcs5s-footerbrand {
            padding-top: 20px;
            border-top: 1px solid #333;
            text-align: center;
            font-size: 13px;
            color: #666;
        }

        .gcs5s-footerbrand p {
            margin-bottom: 10px;
        }

        .gcs5s-brandname {
            font-size: 16px;
            color: #fff;
            font-weight: 600;
        }

        /* ===== 动画效果 ===== */
        @keyframes slideInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .gcs5s-featurecard,
        .gcs5s-techitem,
        .gcs5s-scenariocard {
            animation: slideInUp 0.6s ease-out forwards;
        }

        .gcs5s-featurecard:nth-child(1) { animation-delay: 0.1s; }
        .gcs5s-featurecard:nth-child(2) { animation-delay: 0.2s; }
        .gcs5s-featurecard:nth-child(3) { animation-delay: 0.3s; }
        .gcs5s-featurecard:nth-child(4) { animation-delay: 0.4s; }
        .gcs5s-featurecard:nth-child(5) { animation-delay: 0.5s; }
        .gcs5s-featurecard:nth-child(6) { animation-delay: 0.6s; }

        /* ===== 统计数据部分 ===== */
        .gcs5s-statssection {
            max-width: 1200px;
            margin: 0 auto;
            padding: 60px 40px;
            border-top: 1px solid #e8e8e8;
        }

        .gcs5s-statsgrid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .gcs5s-statitem {
            background: linear-gradient(135deg, #0084ff 0%, #0066cc 100%);
            color: white;
            padding: 30px;
            border-radius: 12px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .gcs5s-statitem:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 132, 255, 0.3);
        }

        .gcs5s-statnum {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .gcs5s-statunit {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .gcs5s-statlabel {
            font-size: 14px;
            opacity: 0.9;
        }