:root {
            --sjb5-primary: #FF6600;
            --sjb5-primary-dark: #E65C00;
            --sjb5-secondary: #2B2E33;
            --sjb5-accent: #00C2FF;
            --sjb5-bg-light: #F8F9FA;
            --sjb5-text-main: #1A1A1B;
            --sjb5-text-muted: #666C75;
            --sjb5-white: #FFFFFF;
            --sjb5-glass: rgba(255, 255, 255, 0.85);
            --sjb5-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --sjb5-border-radius: 16px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            color: var(--sjb5-text-main);
            background-color: var(--sjb5-bg-light);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏 */
        .sjb5-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--sjb5-glass);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .sjb5-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 16px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .sjb5-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .sjb5-logo img {
            height: 36px;
            width: auto;
            display: block;
        }

        .sjb5-nav-menu {
            display: flex;
            list-style: none;
            gap: 24px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .sjb5-nav-link {
            text-decoration: none;
            color: var(--sjb5-text-main);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

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

        /* Hero 区块 - 独特非对称布局 */
        .sjb5-hero {
            padding: 160px 32px 96px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 102, 0, 0.05) 0%, transparent 50%),
                        linear-gradient(135deg, #ffffff 0%, #f3f4f6 100%);
            min-height: 80vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .sjb5-hero-inner {
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 48px;
        }

        .sjb5-hero-content {
            flex: 1;
            min-width: 320px;
            z-index: 2;
        }

        .sjb5-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 102, 0, 0.1);
            color: var(--sjb5-primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            margin-bottom: 24px;
        }

        .sjb5-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(to right, #1a1a1b, #FF6600);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            word-break: break-word;
        }

        .sjb5-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.5rem, 1.35rem);
            color: var(--sjb5-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
            word-break: break-word;
        }

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

        /* 模拟输入法界面的装饰元素 */
        .sjb5-input-mockup {
            width: 100%;
            max-width: 500px;
            background: var(--sjb5-white);
            border-radius: 20px;
            padding: 24px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.12);
            border: 1px solid rgba(0,0,0,0.03);
            transform: perspective(1000px) rotateY(-15deg) rotateX(10deg);
            transition: transform 0.5s ease;
        }

        .sjb5-input-mockup:hover {
            transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
        }

        /* AI灵感中心区块 */
        .sjb5-section {
            padding: 96px 32px;
            max-width: 1400px;
            margin: 0 auto;
        }

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

        .sjb5-section-title {
            font-size: clamp(2rem, 3vw, 2.8rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .sjb5-grid-tools {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .sjb5-tool-card {
            background: var(--sjb5-white);
            padding: 40px;
            border-radius: var(--sjb5-border-radius);
            box-shadow: var(--sjb5-shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
            border-bottom: 4px solid transparent;
        }

        .sjb5-tool-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
            border-bottom-color: var(--sjb5-primary);
        }

        .sjb5-tool-icon {
            width: 64px;
            height: 64px;
            background: var(--sjb5-bg-light);
            border-radius: 12px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--sjb5-primary);
        }

        .sjb5-tool-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .sjb5-tool-scenario {
            color: var(--sjb5-primary);
            font-weight: 600;
            font-size: 14px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .sjb5-tool-action {
            color: var(--sjb5-text-muted);
            font-size: 16px;
        }

        /* 视觉语义层区块 */
        .sjb5-visual-section {
            background: var(--sjb5-secondary);
            color: var(--sjb5-white);
            padding: 96px 32px;
            border-radius: 40px;
            margin: 0 32px 96px;
        }

        .sjb5-visual-content {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

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

        .sjb5-visual-grid {
            flex: 1.5;
            min-width: 320px;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
        }

        .sjb5-skin-tag {
            background: rgba(255,255,255,0.1);
            padding: 24px;
            border-radius: 16px;
            text-align: center;
            transition: background 0.3s ease;
            border: 1px solid rgba(255,255,255,0.05);
        }

        .sjb5-skin-tag:hover {
            background: var(--sjb5-primary);
        }

        /* 最新资讯区块 */
        .sjb5-dynamic-section {
            background: #fff;
            border-radius: 24px;
            margin-bottom: 96px;
        }

        /* 按钮样式 */
        .sjb5-btn {
            display: inline-block;
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            text-align: center;
        }

        .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: scale(1.05);
        }

        /* 页脚 */
        .sjb5-footer {
            background: #111;
            color: #888;
            padding: 80px 32px 40px;
        }

        .sjb5-footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            border-bottom: 1px solid #222;
            padding-bottom: 48px;
            margin-bottom: 40px;
        }

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

        .sjb5-footer-links-title {
            color: var(--sjb5-white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 24px;
        }

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

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

        .sjb5-footer-link {
            color: #888;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

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

        .sjb5-copyright {
            text-align: center;
            font-size: 13px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .sjb5-nav-container {
                padding: 12px 16px;
            }
            .sjb5-nav-menu {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .sjb5-hero {
                padding: 120px 16px 64px;
                text-align: center;
            }
            .sjb5-hero-inner {
                flex-direction: column;
            }
            .sjb5-hero-subtitle {
                margin: 0 auto 40px;
            }
            .sjb5-input-mockup {
                transform: none;
            }
            .sjb5-visual-section {
                margin: 0 16px 64px;
                padding: 64px 24px;
            }
        }