:root {
            --rzm18-primary: #4285F4;
            --rzm18-success: #34A853;
            --rzm18-warning: #FBBC05;
            --rzm18-danger: #EA4335;
            --rzm18-text-main: #202124;
            --rzm18-text-sub: #5f6368;
            --rzm18-bg-light: #f8f9fa;
            --rzm18-white: #ffffff;
            --rzm18-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --rzm18-radius: 16px;
            --rzm18-container-width: 1300px;
        }

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

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            color: var(--rzm18-text-main);
            background-color: var(--rzm18-white);
            line-height: 1.6;
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 导航栏设计 */
        .rzm18-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 0 24px;
        }

        .rzm18-nav-container {
            max-width: var(--rzm18-container-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            flex-wrap: wrap;
        }

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

        .rzm18-logo img {
            height: 36px;
            width: auto;
        }

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

        .rzm18-nav-link {
            text-decoration: none;
            color: var(--rzm18-text-sub);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .rzm18-nav-link:hover {
            background: var(--rzm18-bg-light);
            color: var(--rzm18-primary);
        }

        .rzm18-nav-link.rzm18-active {
            color: var(--rzm18-primary);
            background: rgba(66, 133, 244, 0.1);
        }

        /* Hero 区域：独特的搜索驱动布局 */
        .rzm18-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at 10% 20%, rgba(66, 133, 244, 0.05) 0%, rgba(255, 255, 255, 1) 90%);
            text-align: center;
        }

        .rzm18-hero-inner {
            max-width: 900px;
            margin: 0 auto;
        }

        .rzm18-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--rzm18-text-main);
            word-break: break-word;
        }

        .rzm18-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: var(--rzm18-text-sub);
            max-width: 700px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        .rzm18-search-box {
            background: var(--rzm18-white);
            border: 1px solid #dfe1e5;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            border-radius: 28px;
            padding: 12px 24px;
            display: flex;
            align-items: center;
            max-width: 600px;
            margin: 0 auto;
            transition: box-shadow 0.3s;
        }

        .rzm18-search-box:hover, .rzm18-search-box:focus-within {
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }

        .rzm18-search-input {
            flex: 1;
            border: none;
            outline: none;
            padding: 8px;
            font-size: 1.1rem;
            color: var(--rzm18-text-main);
            min-width: 0;
        }

        /* 插件分类网格 */
        .rzm18-section {
            padding: 80px 24px;
            max-width: var(--rzm18-container-width);
            margin: 0 auto;
        }

        .rzm18-section-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .rzm18-section-title {
            font-size: 2rem;
            font-weight: 700;
            min-width: 0;
        }

        .rzm18-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
        }

        .rzm18-card {
            background: var(--rzm18-white);
            border: 1px solid #f0f0f0;
            border-radius: var(--rzm18-radius);
            padding: 24px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            cursor: pointer;
            min-width: 0;
        }

        .rzm18-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--rzm18-shadow);
            border-color: transparent;
        }

        .rzm18-card-icon {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: var(--rzm18-bg-light);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
        }

        .rzm18-card-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .rzm18-card-desc {
            color: var(--rzm18-text-sub);
            font-size: 0.95rem;
            margin-bottom: 20px;
            flex-grow: 1;
            word-break: break-word;
        }

        .rzm18-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--rzm18-primary);
            border-radius: 12px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* 安全矩阵区块 - 科技感布局 */
        .rzm18-security-matrix-wrapper {
            background: #202124;
            color: var(--rzm18-white);
            padding: 96px 24px;
            margin-top: 48px;
            border-radius: 40px;
        }

        .rzm18-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

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

        .rzm18-matrix-layer {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--rzm18-primary);
            margin-bottom: 12px;
            display: block;
        }

        .rzm18-matrix-title {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .rzm18-matrix-desc {
            color: #bdc1c6;
            font-size: 1rem;
            margin-bottom: 16px;
            word-break: break-word;
        }

        .rzm18-matrix-meta {
            font-size: 0.85rem;
            color: var(--rzm18-success);
            background: rgba(52, 168, 83, 0.15);
            padding: 4px 8px;
            border-radius: 4px;
        }

        /* 核心优势区块 - 交替布局 */
        .rzm18-feature-row {
            display: flex;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
            flex-wrap: wrap;
        }

        .rzm18-feature-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .rzm18-feature-content {
            flex: 1;
            min-width: 320px;
        }

        .rzm18-feature-visual {
            flex: 1;
            min-width: 320px;
            height: 400px;
            background: var(--rzm18-bg-light);
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            position: relative;
        }

        .rzm18-visual-box {
            width: 80%;
            height: 60%;
            background: var(--rzm18-white);
            border-radius: 12px;
            box-shadow: var(--rzm18-shadow);
            padding: 24px;
        }

        /* 动态内容区块 */
        .rzm18-dynamic-section {
            border-top: 1px solid #eee;
        }

        /* 页脚 */
        .rzm18-footer {
            background: var(--rzm18-bg-light);
            padding: 80px 24px 40px;
            margin-top: 80px;
        }

        .rzm18-footer-content {
            max-width: var(--rzm18-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 48px;
            flex-wrap: wrap;
        }

        .rzm18-footer-brand h2 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--rzm18-text-main);
        }

        .rzm18-footer-brand p {
            color: var(--rzm18-text-sub);
            max-width: 300px;
        }

        .rzm18-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1rem;
        }

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

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

        .rzm18-footer-links a {
            text-decoration: none;
            color: var(--rzm18-text-sub);
            transition: color 0.3s;
        }

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

        .rzm18-copyright {
            max-width: var(--rzm18-container-width);
            margin: 40px auto 0;
            padding-top: 24px;
            border-top: 1px solid #ddd;
            text-align: center;
            color: var(--rzm18-text-sub);
            font-size: 0.9rem;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .rzm18-footer-content {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .rzm18-nav-menu {
                display: none; /* 简化演示，手机端通常有汉堡菜单 */
            }
            .rzm18-hero {
                padding: 120px 24px 60px;
            }
            .rzm18-feature-row {
                gap: 32px;
            }
            .rzm18-footer-content {
                grid-template-columns: 1fr;
            }
            .rzm18-feature-visual {
                height: 280px;
            }
        }

        /* 按钮样式 */
        .rzm18-btn {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }

        .rzm18-btn-primary {
            background: var(--rzm18-primary);
            color: var(--rzm18-white);
        }

        .rzm18-btn-primary:hover {
            background: #3367d6;
            transform: scale(1.05);
        }