:root {
            --sjb5-primary: #ff6600;
            --sjb5-primary-dark: #e55c00;
            --sjb5-secondary: #222222;
            --sjb5-text: #333333;
            --sjb5-bg-light: #f8f9fa;
            --sjb5-white: #ffffff;
            --sjb5-gray: #666666;
            --sjb5-accent: #ffede0;
            --sjb5-max-width: 1400px;
        }

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

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

        /* 布局基础 */
        .sjb5-container {
            max-width: var(--sjb5-max-width);
            margin: 0 auto;
            padding: 0 48px;
            width: 100%;
        }

        @media (max-width: 768px) {
            .sjb5-container {
                padding: 0 24px;
            }
        }

        /* 导航栏 */
        .sjb5-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);
            transition: all 0.3s ease;
        }

        .sjb5-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

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

        .sjb5-logo img {
            height: 40px;
            width: auto;
        }

        .sjb5-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            min-width: 0;
        }

        .sjb5-nav a {
            text-decoration: none;
            color: var(--sjb5-secondary);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s;
            word-break: keep-all;
        }

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

        /* Hero 区块 - 独特对角线分割布局 */
        .sjb5-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #fff 50%, var(--sjb5-accent) 50%);
            position: relative;
            overflow: hidden;
        }

        .sjb5-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            min-width: 0;
        }

        .sjb5-hero-text {
            flex: 1;
            min-width: 320px;
            padding-right: 48px;
            word-break: break-word;
        }

        .sjb5-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--sjb5-secondary);
        }

        .sjb5-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.5rem, 1.4rem);
            color: var(--sjb5-gray);
            margin-bottom: 48px;
            max-width: 600px;
        }

        .sjb5-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
            position: relative;
        }

        .sjb5-hero-card {
            background: var(--sjb5-white);
            padding: 40px;
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(255, 102, 0, 0.1);
            transform: rotate(2deg);
            transition: transform 0.4s ease;
            max-width: 500px;
            width: 100%;
        }

        .sjb5-hero-card:hover {
            transform: rotate(0deg) translateY(-10px);
        }

        /* 功能卡片通用样式 */
        .sjb5-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .sjb5-section-title h2 {
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .sjb5-section-title p {
            color: var(--sjb5-gray);
            font-size: 1.1rem;
        }

        /* AI灵感中心 - 层叠式卡片 */
        .sjb5-ai-section {
            padding: 96px 0;
            background-color: var(--sjb5-white);
        }

        .sjb5-ai-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
        }

        .sjb5-ai-card {
            background: var(--sjb5-bg-light);
            border-radius: 20px;
            padding: 40px;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .sjb5-ai-card:hover {
            background: var(--sjb5-white);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
            transform: translateY(-5px);
        }

        .sjb5-ai-card-tag {
            display: inline-block;
            background: var(--sjb5-accent);
            color: var(--sjb5-primary);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            align-self: flex-start;
        }

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

        .sjb5-ai-card p {
            color: var(--sjb5-gray);
            margin-bottom: 24px;
            word-break: break-word;
        }

        .sjb5-ai-action {
            margin-top: auto;
            color: var(--sjb5-primary);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* 视觉语义层 - 横向溢出滚动视觉 */
        .sjb5-visual-section {
            padding: 96px 0;
            background-color: var(--sjb5-secondary);
            color: var(--sjb5-white);
            overflow: hidden;
        }

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

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

        .sjb5-visual-text h2 {
            font-size: 36px;
            margin-bottom: 24px;
            color: var(--sjb5-primary);
        }

        .sjb5-visual-list {
            list-style: none;
            margin-top: 32px;
        }

        .sjb5-visual-item {
            padding: 16px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .sjb5-visual-item:last-child {
            border-bottom: none;
        }

        .sjb5-visual-gallery {
            flex: 1.5;
            min-width: 320px;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .sjb5-gallery-item {
            background: rgba(255,255,255,0.05);
            height: 200px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            text-align: center;
            padding: 20px;
            border: 1px solid rgba(255,255,255,0.1);
            transition: background 0.3s;
        }

        .sjb5-gallery-item:hover {
            background: rgba(255,255,255,0.1);
        }

        /* 动态内容区 - 文章/评测 */
        .sjb5-articles {
            padding: 96px 0;
            background-color: var(--sjb5-bg-light);
        }

        .sjb5-article-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .sjb5-article-item {
            background: var(--sjb5-white);
            padding: 32px;
            border-radius: 16px;
            border: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s;
        }

        .sjb5-article-item:hover {
            border-color: var(--sjb5-primary);
        }

        .sjb5-article-meta {
            font-size: 14px;
            color: var(--sjb5-gray);
            margin-bottom: 12px;
        }

        .sjb5-article-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            display: block;
            color: var(--sjb5-secondary);
            text-decoration: none;
        }

        /* 按钮 */
        .sjb5-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
            font-size: 16px;
        }

        .sjb5-btn-primary {
            background: var(--sjb5-primary);
            color: var(--sjb5-white);
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.2);
        }

        .sjb5-btn-primary:hover {
            background: var(--sjb5-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(255, 102, 0, 0.3);
        }

        /* 页脚 */
        .sjb5-footer {
            background-color: #111;
            color: #ccc;
            padding: 80px 0 40px;
        }

        .sjb5-footer-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 64px;
        }

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

        .sjb5-footer-brand-name {
            font-size: 24px;
            font-weight: 700;
            color: var(--sjb5-white);
            margin-bottom: 20px;
        }

        .sjb5-footer-links {
            flex: 3;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 32px;
            min-width: 320px;
        }

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

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

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

        .sjb5-footer-group ul li a {
            color: #888;
            text-decoration: none;
            transition: color 0.3s;
        }

        .sjb5-footer-group ul li a:hover {
            color: var(--sjb5-primary);
        }

        .sjb5-footer-bottom {
            border-top: 1px solid #222;
            padding-top: 32px;
            text-align: center;
            font-size: 14px;
            color: #666;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .sjb5-hero-text {
                padding-right: 0;
                margin-bottom: 64px;
                text-align: center;
            }
            .sjb5-hero-subtitle {
                margin: 0 auto 48px;
            }
            .sjb5-hero-content {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .sjb5-nav {
                display: none; /* 简化移动端，实际应有汉堡菜单 */
            }
            .sjb5-header {
                height: 70px;
            }
            .sjb5-nav-wrapper {
                height: 70px;
            }
            .sjb5-hero {
                padding-top: 120px;
            }
            .sjb5-ai-grid {
                grid-template-columns: 1fr;
            }
            .sjb5-visual-gallery {
                grid-template-columns: 1fr;
            }
        }