:root {
            --rc1gu-primary: #D42323;
            --rc1gu-primary-hover: #B01B1B;
            --rc1gu-accent: #2D5CFE;
            --rc1gu-text-main: #1D1D1F;
            --rc1gu-text-muted: #6E6E73;
            --rc1gu-bg-light: #F5F5F7;
            --rc1gu-white: #FFFFFF;
            --rc1gu-glass: rgba(255, 255, 255, 0.8);
            --rc1gu-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --rc1gu-container-width: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--rc1gu-text-main);
            background-color: var(--rc1gu-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
            word-break: break-word;
        }

        /* 布局基础 */
        .rc1gu-container {
            max-width: var(--rc1gu-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .rc1gu-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .rc1gu-flex > * {
            min-width: 0;
        }

        /* 导航栏 */
        .rc1gu-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--rc1gu-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            height: 64px;
            transition: all 0.3s ease;
        }

        .rc1gu-nav-container {
            height: 100%;
            justify-content: space-between;
            align-items: center;
        }

        .rc1gu-logo {
            height: 32px;
            display: flex;
            align-items: center;
        }

        .rc1gu-logo img {
            height: 100%;
            width: auto;
        }

        .rc1gu-nav-menu {
            gap: 24px;
            align-items: center;
        }

        .rc1gu-nav-item {
            text-decoration: none;
            color: var(--rc1gu-text-main);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .rc1gu-nav-item:hover {
            color: var(--rc1gu-primary);
        }

        .rc1gu-nav-item.active {
            color: var(--rc1gu-primary);
        }

        .rc1gu-nav-item.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--rc1gu-primary);
            border-radius: 2px;
        }

        /* Hero 区 - 独特卡片式转换中心 */
        .rc1gu-hero {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 90% 10%, rgba(212, 35, 35, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(45, 92, 254, 0.05) 0%, transparent 40%);
            text-align: center;
        }

        .rc1gu-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            color: var(--rc1gu-text-main);
        }

        .rc1gu-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--rc1gu-text-muted);
            max-width: 700px;
            margin: 0 auto 48px;
        }

        /* 核心转换组件 - 视觉焦点 */
        .rc1gu-convert-hub {
            background: var(--rc1gu-white);
            border-radius: 32px;
            padding: 40px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.08);
            border: 1px solid rgba(0,0,0,0.03);
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }

        .rc1gu-drop-zone {
            border: 2px dashed #E5E5E7;
            border-radius: 20px;
            padding: 64px 24px;
            transition: all 0.3s ease;
            cursor: pointer;
            background: var(--rc1gu-bg-light);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .rc1gu-drop-zone:hover {
            border-color: var(--rc1gu-primary);
            background: rgba(212, 35, 35, 0.02);
            transform: scale(1.01);
        }

        .rc1gu-drop-icon {
            width: 64px;
            height: 64px;
            background: var(--rc1gu-primary);
            border-radius: 18px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            box-shadow: 0 8px 20px rgba(212, 35, 35, 0.3);
        }

        .rc1gu-btn-main {
            background: var(--rc1gu-primary);
            color: white;
            padding: 16px 48px;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            margin-top: 24px;
        }

        .rc1gu-btn-main:hover {
            background: var(--rc1gu-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(212, 35, 35, 0.2);
        }

        /* 核心优势 Section */
        .rc1gu-section {
            padding: 96px 0;
        }

        .rc1gu-section-header {
            margin-bottom: 64px;
            text-align: center;
        }

        .rc1gu-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(212, 35, 35, 0.1);
            color: var(--rc1gu-primary);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        /* 行业解决方案 - 交替布局 */
        .rc1gu-solution-row {
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

        .rc1gu-solution-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .rc1gu-solution-content {
            flex: 1;
            min-width: 300px;
        }

        .rc1gu-solution-visual {
            flex: 1;
            min-width: 300px;
            background: var(--rc1gu-bg-light);
            border-radius: 24px;
            height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--rc1gu-shadow);
        }

        .rc1gu-solution-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .rc1gu-solution-text {
            color: var(--rc1gu-text-muted);
            margin-bottom: 24px;
            font-size: 17px;
        }

        .rc1gu-advantage-box {
            padding: 20px;
            background: var(--rc1gu-bg-light);
            border-left: 4px solid var(--rc1gu-accent);
            border-radius: 0 12px 12px 0;
            font-weight: 500;
        }

        /* 安全装甲 - 黑色科技感 Grid */
        .rc1gu-armor-section {
            background: #000;
            color: #fff;
            border-radius: 48px;
            padding: 80px 40px;
            margin: 40px 0;
        }

        .rc1gu-grid-armor {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .rc1gu-armor-card {
            padding: 32px;
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 24px;
            transition: all 0.3s ease;
        }

        .rc1gu-armor-card:hover {
            background: rgba(255,255,255,0.05);
            border-color: var(--rc1gu-primary);
        }

        .rc1gu-armor-card h3 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--rc1gu-primary);
        }

        .rc1gu-armor-card p {
            font-size: 15px;
            color: #A1A1A6;
            margin-bottom: 12px;
        }

        .rc1gu-armor-detail {
            font-size: 13px;
            padding: 8px 12px;
            background: rgba(255,255,255,0.08);
            border-radius: 8px;
            display: inline-block;
        }

        /* 页脚 */
        .rc1gu-footer {
            background: var(--rc1gu-bg-light);
            padding: 80px 0 40px;
            margin-top: 80px;
        }

        .rc1gu-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .rc1gu-footer-brand h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--rc1gu-primary);
            margin-bottom: 16px;
        }

        .rc1gu-footer-links h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .rc1gu-footer-links ul {
            list-style: none;
        }

        .rc1gu-footer-links li {
            margin-bottom: 12px;
        }

        .rc1gu-footer-links a {
            text-decoration: none;
            color: var(--rc1gu-text-muted);
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .rc1gu-footer-links a:hover {
            color: var(--rc1gu-primary);
        }

        .rc1gu-copyright {
            padding-top: 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 13px;
            color: var(--rc1gu-text-muted);
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .rc1gu-nav-menu {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }

            .rc1gu-hero {
                padding: 100px 0 60px;
            }

            .rc1gu-convert-hub {
                padding: 24px;
                border-radius: 24px;
            }

            .rc1gu-solution-row, .rc1gu-solution-row:nth-child(even) {
                flex-direction: column;
                gap: 32px;
            }

            .rc1gu-solution-visual {
                height: 240px;
            }

            .rc1gu-section {
                padding: 64px 0;
            }
        }

        /* 纯CSS装饰 - 代替缺失的图片 */
        .rc1gu-visual-pdf {
            width: 120px;
            height: 160px;
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .rc1gu-visual-pdf::before {
            content: 'PDF';
            background: #E52E2D;
            color: #fff;
            padding: 4px 8px;
            font-size: 12px;
            font-weight: bold;
            position: absolute;
            top: 20px;
            left: -10px;
            border-radius: 4px;
        }

        .rc1gu-arrow-flow {
            margin: 0 20px;
            width: 40px;
            height: 2px;
            background: var(--rc1gu-primary);
            position: relative;
        }

        .rc1gu-arrow-flow::after {
            content: '';
            position: absolute;
            right: 0;
            top: -4px;
            border-left: 8px solid var(--rc1gu-primary);
            border-top: 5px solid transparent;
            border-bottom: 5px solid transparent;
        }

        .rc1gu-visual-word {
            width: 120px;
            height: 160px;
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .rc1gu-visual-word::before {
            content: 'DOCX';
            background: #2B579A;
            color: #fff;
            padding: 4px 8px;
            font-size: 12px;
            font-weight: bold;
            position: absolute;
            top: 20px;
            right: -10px;
            border-radius: 4px;
        }