:root {
            --w87eju-primary: #ff6600;
            --w87eju-primary-hover: #e55c00;
            --w87eju-secondary: #2b2e34;
            --w87eju-text: #333333;
            --w87eju-text-light: #666666;
            --w87eju-bg: #ffffff;
            --w87eju-bg-alt: #f8f9fb;
            --w87eju-accent: #eef2f7;
            --w87eju-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --w87eju-radius: 16px;
            --w87eju-max-width: 1300px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--w87eju-text);
            background-color: var(--w87eju-bg);
            line-height: 1.6;
            word-break: break-word;
            overflow-x: hidden;
        }

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

        .w87eju-fluid-h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; }
        .w87eju-fluid-h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 700; }
        .w87eju-fluid-p { font-size: clamp(1rem, 1vw + 0.5rem, 1.2rem); color: var(--w87eju-text-light); }

        /* Navigation */
        .w87eju-nav-wrapper {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .w87eju-nav-container {
            max-width: var(--w87eju-max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .w87eju-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .w87eju-logo img {
            height: 40px;
            display: block;
        }

        .w87eju-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .w87eju-menu li {
            min-width: 0;
        }

        .w87eju-menu a {
            text-decoration: none;
            color: var(--w87eju-text);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        .w87eju-menu a:hover {
            color: var(--w87eju-primary);
        }

        .w87eju-menu a.active {
            color: var(--w87eju-primary);
        }

        .w87eju-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--w87eju-primary);
            border-radius: 2px;
        }

        /* Hero Section - Unique Center-Stacked Layout */
        .w87eju-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at 80% 20%, #fff5f0 0%, #ffffff 50%);
            text-align: center;
            min-height: 70vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .w87eju-hero-badge {
            display: inline-block;
            background: rgba(255, 102, 0, 0.1);
            color: var(--w87eju-primary);
            padding: 8px 24px;
            border-radius: 50px;
            font-weight: 600;
            margin-bottom: 24px;
            font-size: 0.9rem;
        }

        .w87eju-hero h1 {
            max-width: 900px;
            margin: 0 auto 24px;
            color: var(--w87eju-secondary);
        }

        .w87eju-hero p {
            max-width: 700px;
            margin: 0 auto 48px;
        }

        .w87eju-search-box {
            width: 100%;
            max-width: 650px;
            background: #fff;
            padding: 8px;
            border-radius: 50px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.06);
            display: flex;
            align-items: center;
            border: 2px solid transparent;
            transition: border-color 0.3s ease;
        }

        .w87eju-search-box:focus-within {
            border-color: var(--w87eju-primary);
        }

        .w87eju-search-box input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            outline: none;
            font-size: 1.1rem;
            min-width: 0;
        }

        .w87eju-search-btn {
            background: var(--w87eju-primary);
            color: #fff;
            border: none;
            padding: 12px 40px;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, background 0.2s ease;
        }

        .w87eju-search-btn:hover {
            background: var(--w87eju-primary-hover);
            transform: scale(1.05);
        }

        /* Productivity Matrix Section */
        .w87eju-section {
            padding: 96px 24px;
            max-width: var(--w87eju-max-width);
            margin: 0 auto;
        }

        .w87eju-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .w87eju-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            width: 100%;
        }

        .w87eju-card {
            background: var(--w87eju-bg-alt);
            padding: 48px;
            border-radius: var(--w87eju-radius);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
            min-width: 0;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .w87eju-card:hover {
            transform: translateY(-10px);
            background: #fff;
            box-shadow: var(--w87eju-shadow);
        }

        .w87eju-card-icon {
            width: 64px;
            height: 64px;
            background: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 32px;
            font-size: 2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }

        .w87eju-card h3 {
            margin-bottom: 16px;
            font-size: 1.5rem;
        }

        .w87eju-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 16px 0 24px;
        }

        .w87eju-tag {
            background: rgba(0,0,0,0.05);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.85rem;
            color: var(--w87eju-text-light);
        }

        .w87eju-card-usecase {
            margin-top: auto;
            padding-top: 24px;
            border-top: 1px dashed #ddd;
            font-size: 0.95rem;
            color: var(--w87eju-primary);
            font-weight: 500;
        }

        /* Category Grid Section */
        .w87eju-category-section {
            background-color: var(--w87eju-secondary);
            color: #fff;
            padding: 96px 24px;
            border-radius: 40px;
            margin: 0 24px;
        }

        .w87eju-category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 20px;
            max-width: var(--w87eju-max-width);
            margin: 48px auto 0;
        }

        .w87eju-category-item {
            background: rgba(255,255,255,0.05);
            padding: 24px;
            border-radius: 12px;
            text-align: center;
            transition: background 0.3s;
            cursor: pointer;
            text-decoration: none;
            color: #fff;
        }

        .w87eju-category-item:hover {
            background: rgba(255,255,255,0.15);
        }

        .w87eju-category-item span {
            display: block;
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .w87eju-category-item small {
            opacity: 0.6;
        }

        /* CTA Section */
        .w87eju-cta {
            padding: 96px 24px;
            text-align: center;
        }

        .w87eju-cta-content {
            max-width: 800px;
            margin: 0 auto;
            background: linear-gradient(135deg, #ff6600, #ff8533);
            padding: 64px;
            border-radius: 32px;
            color: #fff;
        }

        .w87eju-cta-content h2 {
            margin-bottom: 24px;
        }

        .w87eju-btn-white {
            background: #fff;
            color: var(--w87eju-primary);
            padding: 16px 48px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            display: inline-block;
            margin-top: 32px;
            transition: transform 0.3s ease;
        }

        .w87eju-btn-white:hover {
            transform: scale(1.05);
        }

        /* Footer */
        .w87eju-footer {
            background: var(--w87eju-bg-alt);
            padding: 80px 24px 40px;
            border-top: 1px solid #eee;
        }

        .w87eju-footer-grid {
            max-width: var(--w87eju-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .w87eju-footer-brand h4 {
            font-size: 1.5rem;
            color: var(--w87eju-primary);
            margin-bottom: 16px;
        }

        .w87eju-footer-links h5 {
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

        .w87eju-footer-links ul {
            list-style: none;
        }

        .w87eju-footer-links li {
            margin-bottom: 12px;
        }

        .w87eju-footer-links a {
            text-decoration: none;
            color: var(--w87eju-text-light);
            transition: color 0.3s;
        }

        .w87eju-footer-links a:hover {
            color: var(--w87eju-primary);
        }

        .w87eju-footer-bottom {
            max-width: var(--w87eju-max-width);
            margin: 0 auto;
            padding-top: 40px;
            border-top: 1px solid #ddd;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            font-size: 0.9rem;
            color: #999;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .w87eju-nav-container {
                height: auto;
                padding: 16px;
            }
            .w87eju-menu {
                margin-top: 16px;
                gap: 12px;
                justify-content: center;
            }
            .w87eju-hero {
                padding-top: 140px;
            }
            .w87eju-search-box {
                flex-direction: column;
                border-radius: 20px;
                padding: 16px;
            }
            .w87eju-search-btn {
                width: 100%;
                margin-top: 12px;
            }
            .w87eju-category-section {
                margin: 0 16px;
                padding: 64px 16px;
            }
        }
    


        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }