:root {
            --sjb5-primary: #FF5500;
            --sjb5-primary-light: #FF8844;
            --sjb5-secondary: #222222;
            --sjb5-bg-light: #F9FAFB;
            --sjb5-text-main: #1D1D1F;
            --sjb5-text-muted: #6E6E73;
            --sjb5-white: #FFFFFF;
            --sjb5-gradient: linear-gradient(135deg, #FF5500 0%, #FF2200 100%);
            --sjb5-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --sjb5-radius: 20px;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        /* Layout Helpers */
        .sjb5-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .sjb5-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .sjb5-grid {
            display: grid;
            gap: 24px;
        }

        /* Typography */
        h1, h2, h3 {
            line-height: 1.2;
            word-break: keep-all;
            white-space: normal;
        }

        .sjb5-fluid-h1 {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            margin-bottom: 24px;
        }

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

        .sjb5-fluid-p {
            font-size: clamp(1rem, 1vw + 0.5rem, 1.25rem);
            line-height: 1.8;
            max-width: 800px;
            word-break: break-word;
        }

        /* Navigation */
        .sjb5-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

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

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

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

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

        .sjb5-menu-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--sjb5-text-main);
            opacity: 0.8;
        }

        .sjb5-menu-link:hover {
            color: var(--sjb5-primary);
            opacity: 1;
        }

        /* Hero Section - Unique Asymmetrical Layout */
        .sjb5-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at 90% 10%, rgba(255, 85, 0, 0.05) 0%, transparent 40%);
            position: relative;
        }

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

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

        .sjb5-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 85, 0, 0.1);
            color: var(--sjb5-primary);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .sjb5-hero-visual {
            flex: 1.2;
            min-width: 300px;
            position: relative;
            display: flex;
            justify-content: flex-end;
        }

        .sjb5-floating-card {
            background: var(--sjb5-white);
            padding: 32px;
            border-radius: var(--sjb5-radius);
            box-shadow: var(--sjb5-shadow);
            max-width: 450px;
            transform: rotate(2deg);
            transition: transform 0.5s ease;
            border: 1px solid rgba(255, 85, 0, 0.1);
        }

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

        /* Section Styling */
        .sjb5-section {
            padding: 96px 0;
        }

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

        /* Skin Category Grid */
        .sjb5-category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .sjb5-category-card {
            background: var(--sjb5-white);
            border-radius: var(--sjb5-radius);
            padding: 40px;
            transition: all 0.4s ease;
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
            min-width: 0;
        }

        .sjb5-category-card:hover {
            border-color: var(--sjb5-primary);
            box-shadow: var(--sjb5-shadow);
            transform: translateY(-8px);
        }

        .sjb5-category-tag {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--sjb5-primary);
            font-weight: 700;
            margin-bottom: 12px;
            display: block;
        }

        /* AI Tools Section */
        .sjb5-ai-section {
            background: var(--sjb5-secondary);
            color: var(--sjb5-white);
            border-radius: 40px;
            margin: 48px 24px;
            padding: 80px 48px;
        }

        .sjb5-ai-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 48px;
            margin-top: 48px;
        }

        .sjb5-ai-item {
            padding: 32px;
            border-left: 2px solid var(--sjb5-primary);
            background: rgba(255,255,255,0.03);
            min-width: 0;
        }

        .sjb5-ai-tool-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--sjb5-primary-light);
        }

        .sjb5-ai-scenario {
            font-size: 14px;
            opacity: 0.6;
            margin-bottom: 16px;
        }

        /* Buttons */
        .sjb5-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 32px;
            border-radius: 12px;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .sjb5-btn-primary {
            background: var(--sjb5-gradient);
            color: var(--sjb5-white);
            box-shadow: 0 10px 20px rgba(255, 85, 0, 0.2);
        }

        .sjb5-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px rgba(255, 85, 0, 0.3);
        }

        /* Footer */
        .sjb5-footer {
            background: #FFFFFF;
            padding: 80px 0 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .sjb5-footer-top {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 64px;
        }

        .sjb5-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .sjb5-brand-name {
            font-size: 24px;
            font-weight: 800;
            color: var(--sjb5-primary);
            margin-bottom: 16px;
        }

        .sjb5-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
            flex: 2;
        }

        .sjb5-link-group h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

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

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

        .sjb5-link-group a {
            color: var(--sjb5-text-muted);
            font-size: 14px;
        }

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

        .sjb5-footer-bottom {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
            color: var(--sjb5-text-muted);
            font-size: 13px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .sjb5-hero-visual {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .sjb5-hero {
                padding: 120px 0 64px;
                text-align: center;
            }
            .sjb5-hero-content {
                flex-direction: column;
            }
            .sjb5-hero-visual {
                display: none; /* Hide complex visuals on small mobile for speed */
            }
            .sjb5-ai-section {
                margin: 24px 12px;
                padding: 48px 24px;
            }
            .sjb5-menu {
                display: none; /* Mobile menu would typically be a hamburger */
            }
            .sjb5-footer-links {
                gap: 32px;
            }
        }