/* 基础变量与重置 */
        :root {
            --sjb5-primary: #ff6600;
            --sjb5-primary-dark: #e65c00;
            --sjb5-accent: #4a90e2;
            --sjb5-bg-light: #fdfdfd;
            --sjb5-bg-dark: #0f172a;
            --sjb5-text-main: #1e293b;
            --sjb5-text-muted: #64748b;
            --sjb5-radius: 16px;
            --sjb5-transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--sjb5-bg-light);
            color: var(--sjb5-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 布局容器 */
        .sjb5-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            width: 92vw;
        }

        /* 导航系统 - 悬浮胶囊设计 */
        .sjb5-header {
            position: fixed;
            top: 24px;
            left: 50%;
            transform: translateX(-50%);
            width: 92vw;
            max-width: 1200px;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            border-radius: 100px;
            border: 1px solid rgba(0,0,0,0.05);
            box-shadow: 0 4px 30px rgba(0,0,0,0.05);
            padding: 8px 16px;
        }

        .sjb5-nav-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }

        .sjb5-logo {
            min-width: 0;
            padding: 8px;
        }

        .sjb5-logo img {
            height: 32px;
            display: block;
        }

        .sjb5-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .sjb5-nav-menu li {
            min-width: 0;
        }

        .sjb5-nav-link {
            text-decoration: none;
            color: var(--sjb5-text-main);
            font-size: 14px;
            font-weight: 500;
            padding: 10px 16px;
            border-radius: 50px;
            transition: var(--sjb5-transition);
        }

        .sjb5-nav-link:hover {
            background: rgba(255, 102, 0, 0.1);
            color: var(--sjb5-primary);
        }

        /* Hero 区 - 非对称创意布局 */
        .sjb5-hero {
            padding-top: 180px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 102, 0, 0.05) 0%, transparent 40%);
            overflow: hidden;
        }

        .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(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            word-break: keep-all;
            background: linear-gradient(135deg, #1e293b 0%, #ff6600 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .sjb5-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--sjb5-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .sjb5-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .sjb5-btn-main {
            display: inline-flex;
            align-items: center;
            background: linear-gradient(135deg, var(--sjb5-primary) 0%, #ff8533 100%);
            color: white;
            padding: 18px 48px;
            border-radius: 100px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 10px 25px rgba(255, 102, 0, 0.3);
            transition: var(--sjb5-transition);
        }

        .sjb5-btn-main:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(255, 102, 0, 0.4);
        }

        /* 模块卡片 - Bento Box 风格 */
        .sjb5-section {
            padding: 96px 0;
        }

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

        .sjb5-section-title {
            font-size: clamp(2rem, 3vw, 2.5rem);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .sjb5-grid-bento {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
        }

        .sjb5-bento-card {
            background: #fff;
            border-radius: var(--sjb5-radius);
            padding: 40px;
            border: 1px solid rgba(0,0,0,0.04);
            transition: var(--sjb5-transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            overflow: hidden;
            position: relative;
        }

        .sjb5-bento-card:hover {
            border-color: rgba(255, 102, 0, 0.3);
            transform: scale(1.02);
            box-shadow: 0 20px 40px rgba(0,0,0,0.03);
        }

        .sjb5-card-1 { grid-column: span 7; min-height: 400px; }
        .sjb5-card-2 { grid-column: span 5; background: #fafafa; }
        .sjb5-card-3 { grid-column: span 5; }
        .sjb5-card-4 { grid-column: span 7; background: linear-gradient(135deg, #fff 0%, #fff5f0 100%); }

        .sjb5-module-name {
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--sjb5-primary);
            font-weight: 700;
            margin-bottom: 16px;
            display: block;
        }

        .sjb5-tool-item {
            margin-bottom: 24px;
            padding-left: 20px;
            border-left: 3px solid var(--sjb5-primary);
        }

        .sjb5-tool-name {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .sjb5-tool-scenario {
            font-size: 0.9rem;
            color: var(--sjb5-text-muted);
            margin-bottom: 4px;
        }

        /* 视觉语义层展示 */
        .sjb5-skin-showcase {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }

        .sjb5-skin-tag {
            background: #fff;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
            border: 1px solid rgba(0,0,0,0.02);
        }

        /* 统计区块 */
        .sjb5-stats-section {
            background: var(--sjb5-bg-dark);
            color: white;
            border-radius: 40px;
            margin: 48px 24px;
            padding: 80px 0;
            text-align: center;
        }

        .sjb5-stat-item {
            flex: 1;
            min-width: 240px;
            padding: 24px;
        }

        .sjb5-stat-number {
            font-size: clamp(3rem, 6vw, 5rem);
            font-weight: 800;
            color: var(--sjb5-primary);
            display: block;
        }

        /* 动态内容标记区块 */
        .sjb5-news-section {
            background: #fff;
        }

        .sjb5-news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .sjb5-news-card {
            padding: 24px;
            border-bottom: 1px solid #eee;
            transition: var(--sjb5-transition);
        }

        .sjb5-news-card:hover {
            background: #fdfdfd;
            padding-left: 32px;
        }

        /* 页脚 */
        .sjb5-footer {
            background: #f8fafc;
            padding: 80px 0 40px;
            border-top: 1px solid #edf2f7;
        }

        .sjb5-footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            margin-bottom: 64px;
        }

        .sjb5-footer-brand {
            flex: 2;
            min-width: 280px;
        }

        .sjb5-brand-name {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--sjb5-text-main);
            margin-bottom: 16px;
            display: block;
        }

        .sjb5-footer-links {
            flex: 1;
            min-width: 160px;
        }

        .sjb5-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1rem;
        }

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

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

        .sjb5-footer-links a {
            text-decoration: none;
            color: var(--sjb5-text-muted);
            font-size: 0.9rem;
            transition: var(--sjb5-transition);
        }

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

        .sjb5-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #e2e8f0;
            color: var(--sjb5-text-muted);
            font-size: 0.85rem;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .sjb5-card-1, .sjb5-card-2, .sjb5-card-3, .sjb5-card-4 {
                grid-column: span 12;
            }
        }

        @media (max-width: 768px) {
            .sjb5-header {
                top: 0;
                width: 100%;
                border-radius: 0;
                padding: 4px 8px;
            }
            .sjb5-nav-menu {
                display: none; /* 简化移动端，实际项目中可使用汉堡菜单 */
            }
            .sjb5-hero {
                padding-top: 120px;
                text-align: center;
            }
            .sjb5-btn-group {
                justify-content: center;
            }
            .sjb5-hero-content {
                flex-direction: column;
            }
        }