:root {
            --rzm18-primary: #4285F4;
            --rzm18-red: #EA4335;
            --rzm18-yellow: #FBBC05;
            --rzm18-green: #34A853;
            --rzm18-text-dark: #202124;
            --rzm18-text-light: #5f6368;
            --rzm18-bg-white: #ffffff;
            --rzm18-bg-gray: #f8f9fa;
            --rzm18-radius: 20px;
            --rzm18-container: 1320px;
            --rzm18-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
            color: var(--rzm18-text-dark);
            background-color: var(--rzm18-bg-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局容器 */
        .rzm18-container {
            max-width: var(--rzm18-container);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏设计：浮岛式悬浮导航 */
        .rzm18-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 16px;
        }

        .rzm18-nav-wrapper {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 24px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            max-width: 1200px;
            margin: 0 auto;
        }

        .rzm18-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .rzm18-logo img {
            height: 32px;
            width: auto;
        }

        .rzm18-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .rzm18-nav-item a {
            text-decoration: none;
            color: var(--rzm18-text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 20px;
            transition: var(--rzm18-transition);
            display: block;
            white-space: nowrap;
        }

        .rzm18-nav-item a:hover {
            color: var(--rzm18-primary);
            background: rgba(66, 133, 244, 0.08);
        }

        .rzm18-nav-item a.rzm18-active {
            background: var(--rzm18-primary);
            color: #fff;
        }

        /* Hero Section: 动态非对称布局 */
        .rzm18-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 90% 10%, rgba(66, 133, 244, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(52, 168, 83, 0.05) 0%, transparent 40%);
        }

        .rzm18-hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .rzm18-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .rzm18-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -1px;
            color: var(--rzm18-text-dark);
        }

        .rzm18-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--rzm18-text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .rzm18-hero-visual {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .rzm18-hero-image-box {
            position: relative;
            border-radius: var(--rzm18-radius);
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0,0,0,0.12);
            transform: perspective(1000px) rotateY(-5deg);
            transition: var(--rzm18-transition);
        }

        .rzm18-hero-image-box:hover {
            transform: perspective(1000px) rotateY(0deg);
        }

        .rzm18-hero-image-box img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 核心特性区块 */
        .rzm18-section {
            padding: 96px 0;
        }

        .rzm18-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .rzm18-section-title h2 {
            font-size: clamp(2rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .rzm18-feature-card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .rzm18-feature-card {
            background: var(--rzm18-bg-gray);
            border-radius: var(--rzm18-radius);
            padding: 40px;
            transition: var(--rzm18-transition);
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .rzm18-feature-card:hover {
            background: #fff;
            box-shadow: 0 20px 40px rgba(0,0,0,0.06);
            border-color: rgba(66, 133, 244, 0.1);
            transform: translateY(-8px);
        }

        .rzm18-feature-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 12px;
        }

        /* 安全矩阵专用样式 */
        .rzm18-security-matrix {
            background: var(--rzm18-text-dark);
            color: #fff;
            border-radius: 32px;
            padding: 64px;
            margin: 40px 0;
        }

        .rzm18-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .rzm18-matrix-item {
            border-left: 2px solid var(--rzm18-primary);
            padding-left: 24px;
            min-width: 0;
        }

        .rzm18-matrix-layer {
            color: var(--rzm18-primary);
            font-weight: 700;
            font-size: 0.9rem;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .rzm18-matrix-desc {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 12px;
        }

        .rzm18-matrix-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(255,255,255,0.1);
            border-radius: 4px;
            font-size: 0.75rem;
        }

        /* 资讯区块 */
        .rzm18-news-section {
            background: #f1f3f4;
        }

        /* 页脚 */
        .rzm18-footer {
            padding: 80px 0 40px;
            border-top: 1px solid #eee;
        }

        .rzm18-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .rzm18-footer-brand h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--rzm18-text-dark);
        }

        .rzm18-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .rzm18-footer-column h4 {
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .rzm18-footer-column ul {
            list-style: none;
        }

        .rzm18-footer-column li {
            margin-bottom: 12px;
        }

        .rzm18-footer-column a {
            color: var(--rzm18-text-light);
            text-decoration: none;
            transition: var(--rzm18-transition);
        }

        .rzm18-footer-column a:hover {
            color: var(--rzm18-primary);
        }

        .rzm18-copyright {
            margin-top: 64px;
            padding-top: 24px;
            border-top: 1px solid #eee;
            text-align: center;
            color: var(--rzm18-text-light);
            font-size: 0.9rem;
        }

        /* 按钮样式 */
        .rzm18-btn {
            display: inline-block;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--rzm18-transition);
            cursor: pointer;
            border: none;
        }

        .rzm18-btn-primary {
            background: var(--rzm18-primary);
            color: #fff;
            box-shadow: 0 10px 20px rgba(66, 133, 244, 0.3);
        }

        .rzm18-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(66, 133, 244, 0.4);
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .rzm18-nav-menu {
                display: none; /* 简化演示，移动端可隐藏或改为汉堡菜单 */
            }
            .rzm18-hero-grid {
                flex-direction: column;
                text-align: center;
            }
            .rzm18-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .rzm18-hero-image-box {
                transform: none;
            }
        }

        @media (max-width: 768px) {
            .rzm18-section {
                padding: 64px 0;
            }
            .rzm18-security-matrix {
                padding: 32px;
            }
        }