/* roulang page: index */
:root {
            --bg-deep: #0B0E14;
            --bg-card: #141822;
            --text-main: #FFFFFF;
            --text-dim: #94A3B8;
            --accent-green: #00F298;
            --accent-blue: #00C4FF;
            --border-color: rgba(255, 255, 255, 0.08);
            --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; background: var(--bg-deep); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul { list-style: none; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

        /* Header */
        header { position: fixed; top: 0; width: 100%; z-index: 1000; backdrop-filter: blur(16px); background: rgba(11, 14, 20, 0.8); border-bottom: 1px solid var(--border-color); padding: 16px 0; }
        .nav-wrapper { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 20px; font-weight: 700; color: var(--accent-green); }
        .nav-items { display: flex; gap: 32px; font-size: 14px; font-weight: 500; }
        .btn-cta { background: var(--accent-green); color: #000; padding: 10px 24px; border-radius: 4px; font-weight: 600; cursor: pointer; }

        /* Hero */
        .hero { min-height: 80vh; display: flex; align-items: center; padding-top: 80px; background: linear-gradient(rgba(11,14,20,0.8), rgba(11,14,20,0.8)), url('/assets/images/backpic/back-1.jpg') center/cover; }
        .hero-content { max-width: 700px; }
        .hero h1 { font-size: 56px; margin-bottom: 24px; line-height: 1.2; }
        .hero p { font-size: 18px; color: var(--text-dim); margin-bottom: 32px; }

        /* Sections */
        section { padding: 80px 0; border-bottom: 1px solid var(--border-color); }
        .section-header { text-align: center; margin-bottom: 60px; }
        .section-header h2 { font-size: 38px; margin-bottom: 16px; }

        /* Bento Grid */
        .bento-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .bento-item { background: var(--bg-card); padding: 32px; border: 1px solid var(--border-color); border-radius: 6px; }
        .bento-item.large { grid-column: span 2; }

        /* Comparison Table */
        .comp-table { width: 100%; border-collapse: collapse; margin-top: 40px; }
        .comp-table th, .comp-table td { padding: 20px; border: 1px solid var(--border-color); text-align: left; }

        /* Footer */
        footer { background: #05070A; padding: 80px 0 40px; color: var(--text-dim); }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }

        /* Sticky CTA */
        .floating-cta { position: fixed; bottom: 0; width: 100%; background: var(--accent-green); color: #000; text-align: center; padding: 16px; font-weight: 700; z-index: 999; display: none; }
        
        @media (max-width: 768px) {
            .nav-items { display: none; }
            .bento-grid { grid-template-columns: 1fr; }
            .bento-item.large { grid-column: span 1; }
            .footer-grid { grid-template-columns: 1fr; }
        }