:root {
            --sjb5-primary: #ff6600;
            --sjb5-primary-light: #ff8533;
            --sjb5-secondary: #2b3a4a;
            --sjb5-accent: #3385ff;
            --sjb5-bg-light: #fdfdfd;
            --sjb5-bg-gray: #f4f7f9;
            --sjb5-text-main: #2c3e50;
            --sjb5-text-muted: #667c92;
            --sjb5-white: #ffffff;
            --sjb5-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --sjb5-radius: 16px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--sjb5-text-main);
            background-color: var(--sjb5-bg-light);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 布局容器 */
        .sjb5-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .sjb5-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .sjb5-nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            flex-wrap: wrap;
        }

        .sjb5-logo {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .sjb5-logo img {
            height: 32px;
            width: auto;
        }

        .sjb5-nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
            flex-wrap: wrap;
            min-width: 0;
        }

        .sjb5-nav-menu a {
            text-decoration: none;
            color: var(--sjb5-text-main);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
            white-space: nowrap;
        }

        .sjb5-nav-menu a:hover {
            color: var(--sjb5-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .sjb5-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 90% 10%, rgba(255,102,0,0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(51,133,255,0.05) 0%, transparent 40%);
            position: relative;
        }

        .sjb5-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .sjb5-hero-text {
            flex: 1;
            min-width: 320px;
        }

        .sjb5-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, var(--sjb5-secondary) 0%, var(--sjb5-primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: keep-all;
        }

        .sjb5-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--sjb5-text-muted);
            margin-bottom: 32px;
            max-width: 600px;
        }

        .sjb5-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255,102,0,0.1);
            color: var(--sjb5-primary);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        /* 核心优缺点对比区块 - 采用卡片错位设计 */
        .sjb5-analysis-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .sjb5-card {
            background: var(--sjb5-white);
            padding: 40px;
            border-radius: var(--sjb5-radius);
            box-shadow: var(--sjb5-shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-width: 0;
            border-top: 4px solid transparent;
        }

        .sjb5-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

        .sjb5-card-pro { border-top-color: #00c853; }
        .sjb5-card-con { border-top-color: #ff3d00; }

        .sjb5-card-tag {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 700;
            margin-bottom: 16px;
            display: block;
        }

        .sjb5-card-pro .sjb5-card-tag { color: #00c853; }
        .sjb5-card-con .sjb5-card-tag { color: #ff3d00; }

        .sjb5-card h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--sjb5-secondary);
        }

        .sjb5-card ul {
            list-style: none;
        }

        .sjb5-card ul li {
            margin-bottom: 12px;
            padding-left: 24px;
            position: relative;
            font-size: 15px;
        }

        .sjb5-card-pro ul li::before { content: "✓"; position: absolute; left: 0; color: #00c853; font-weight: bold; }
        .sjb5-card-con ul li::before { content: "!"; position: absolute; left: 0; color: #ff3d00; font-weight: bold; }

        /* 生产力扩展区块 */
        .sjb5-productivity-section {
            padding: 96px 0;
            background: var(--sjb5-bg-gray);
        }

        .sjb5-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .sjb5-section-title h2 {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .sjb5-module-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .sjb5-module-item {
            flex: 1;
            min-width: 320px;
            background: var(--sjb5-white);
            border-radius: var(--sjb5-radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .sjb5-module-header {
            padding: 24px;
            background: var(--sjb5-secondary);
            color: var(--sjb5-white);
        }

        .sjb5-tool-list {
            padding: 24px;
        }

        .sjb5-tool-card {
            padding: 16px;
            border: 1px solid #eee;
            border-radius: 12px;
            margin-bottom: 16px;
        }

        .sjb5-tool-name {
            font-weight: 700;
            color: var(--sjb5-primary);
            margin-bottom: 4px;
            display: block;
        }

        .sjb5-tool-scenario {
            font-size: 13px;
            color: var(--sjb5-text-muted);
            margin-bottom: 8px;
        }

        .sjb5-tool-action {
            font-size: 14px;
            color: var(--sjb5-text-main);
        }

        /* 视觉语义展示 */
        .sjb5-visual-layer {
            padding: 96px 0;
        }

        .sjb5-visual-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
        }

        .sjb5-visual-info {
            flex: 1;
            min-width: 300px;
        }

        .sjb5-skin-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }

        .sjb5-skin-tag {
            padding: 8px 20px;
            background: #f0f0f0;
            border-radius: 8px;
            font-size: 14px;
            color: var(--sjb5-secondary);
        }

        /* 资讯/动态区块 */
        .sjb5-news-section {
            padding: 80px 0;
            background: #fff;
            border-top: 1px solid #eee;
        }

        .sjb5-news-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .sjb5-news-item {
            flex: 1;
            min-width: 280px;
            padding: 24px;
            background: var(--sjb5-bg-gray);
            border-radius: 12px;
            text-decoration: none;
            color: inherit;
            transition: background 0.3s;
        }

        .sjb5-news-item:hover {
            background: #eaeff2;
        }

        .sjb5-news-date {
            font-size: 12px;
            color: var(--sjb5-text-muted);
            margin-bottom: 8px;
            display: block;
        }

        .sjb5-news-item h4 {
            font-size: 18px;
            margin-bottom: 12px;
        }

        /* 页脚 */
        .sjb5-footer {
            background: var(--sjb5-secondary);
            color: rgba(255,255,255,0.7);
            padding: 80px 0 40px;
        }

        .sjb5-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .sjb5-footer-brand h2 {
            color: var(--sjb5-white);
            font-size: 24px;
            margin-bottom: 16px;
        }

        .sjb5-footer-links h4 {
            color: var(--sjb5-white);
            margin-bottom: 24px;
            font-size: 16px;
        }

        .sjb5-footer-links ul {
            list-style: none;
        }

        .sjb5-footer-links ul li {
            margin-bottom: 12px;
        }

        .sjb5-footer-links a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s;
        }

        .sjb5-footer-links a:hover {
            color: var(--sjb5-primary);
        }

        .sjb5-footer-bottom {
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .sjb5-nav-wrapper {
                justify-content: center;
                height: auto;
                padding: 16px 0;
            }
            .sjb5-nav-menu {
                justify-content: center;
                margin-top: 16px;
            }
            .sjb5-hero {
                padding-top: 120px;
                text-align: center;
            }
            .sjb5-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* 动画增强 */
        .sjb5-btn {
            display: inline-flex;
            align-items: center;
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--sjb5-primary) 0%, var(--sjb5-primary-light) 100%);
            color: var(--sjb5-white);
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 8px 20px rgba(255,102,0,0.2);
        }

        .sjb5-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 24px rgba(255,102,0,0.3);
        }