/* roulang page: index */
:root {
            --primary: #1E40AF;
            --accent: #0284C7;
            --bg-page: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --card-border: #E2E8F0;
        }
        body {
            background-color: var(--bg-page);
            color: #334155;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            scroll-behavior: smooth;
        }
        .hero-mesh {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.78) 100%), url('/assets/images/f22e58a26da6e17b.webp');
            background-size: cover;
            background-position: center;
        }
        .coupon-notch {
            position: relative;
            background: #ffffff;
            border-radius: 16px;
            box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06);
            border: 1px solid #e2e8f0;
        }
        .coupon-notch::before, .coupon-notch::after {
            content: '';
            position: absolute;
            top: 50%;
            width: 20px;
            height: 20px;
            background: var(--bg-page);
            border-radius: 50%;
            transform: translateY(-50%);
        }
        .coupon-notch::before { left: -10px; border-right: 1px solid #e2e8f0; }
        .coupon-notch::after { right: -10px; border-left: 1px solid #e2e8f0; }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 30px -10px rgba(2, 132, 199, 0.15);
            border-color: #93c5fd;
        }
        .tech-tag {
            display: inline-flex;
            align-items: center;
            padding: 2px 10px;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            background-color: #eff6ff;
            color: #1d4ed8;
            border: 1px solid #bfdbfe;
        }