/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-light: #3B82F6;
            --secondary: #0D9488;
            --dark-navy: #0F172A;
            --bg-light: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, sans-serif;
        }
        body {
            background-color: #FFFFFF;
            color: #334155;
            overflow-x: hidden;
        }
        .hero-slant {
            clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-slant {
                clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
            }
        }
        .text-gradient {
            background: linear-gradient(135deg, #1E40AF 0%, #0D9488 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .faq-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease;
        }