/* roulang page: index */
:root {
            --color-primary: #1d4ed8;
            --color-primary-hover: #1e40af;
            --bg-page: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --card-border: #e2e8f0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .custom-card-shadow {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .custom-card-shadow:hover {
            box-shadow: 0 12px 28px rgba(15, 98, 254, 0.12);
            transform: translateY(-3px);
        }
        .coupon-cutout {
            position: relative;
            background: radial-gradient(circle at left, transparent 10px, white 11px) left,
                        radial-gradient(circle at right, transparent 10px, white 11px) right;
            background-size: 51% 100%;
            background-repeat: no-repeat;
        }