/* roulang page: index */
:root {
            --primary: #1E40AF;
            --accent: #0284C7;
            --success: #0D9488;
            --danger: #E11D48;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        .coupon-mask {
            background: radial-gradient(circle at left, transparent 10px, #ffffff 11px) left,
                        radial-gradient(circle at right, transparent 10px, #ffffff 11px) right;
            background-size: 51% 100%;
            background-repeat: no-repeat;
        }
        .code-pill {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }