/* roulang page: index */
:root {
            --primary: #0EA5E9;
            --secondary: #10B981;
            --dark: #0B0F17;
            --light-bg: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: #F8FAFC;
            color: #1E293B;
            line-height: 1.75;
        }
        .hero-pattern {
            background-image: linear-gradient(135deg, rgba(11, 15, 23, 0.92) 0%, rgba(15, 23, 42, 0.85) 100%), url('/assets/images/beae15a048dfda1f.webp');
            background-size: cover;
            background-position: center;
        }
        .coupon-notch {
            position: relative;
        }
        .coupon-notch::before, .coupon-notch::after {
            content: '';
            position: absolute;
            top: 50%;
            width: 20px;
            height: 20px;
            background-color: #F8FAFC;
            border-radius: 50%;
            transform: translateY(-50%);
            z-index: 10;
        }
        .coupon-notch::before { left: -10px; }
        .coupon-notch::after { right: -10px; }
        .dark-coupon-notch::before, .dark-coupon-notch::after {
            background-color: #0B0F17;
        }