/* roulang page: index */
:root {
            --primary: #0F172A;
            --accent: #0EA5E9;
            --highlight: #10B981;
            --surface: #1E293B;
            --canvas: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #334155;
            background-color: var(--canvas);
        }
        .text-glow {
            text-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
        }
        .coupon-cutout-left {
            position: relative;
        }
        .coupon-cutout-left::before {
            content: '';
            position: absolute;
            top: 50%;
            left: -12px;
            transform: translateY(-50%);
            width: 24px;
            height: 24px;
            background-color: #0F172A;
            border-radius: 50%;
        }
        .coupon-cutout-right {
            position: relative;
        }
        .coupon-cutout-right::after {
            content: '';
            position: absolute;
            top: 50%;
            right: -12px;
            transform: translateY(-50%);
            width: 24px;
            height: 24px;
            background-color: #0F172A;
            border-radius: 50%;
        }