/* roulang page: index */
:root {
            --primary: #0E7490;
            --primary-hover: #0891B2;
            --accent: #F97316;
            --slate-900: #0F172A;
            --slate-800: #1E293B;
            --slate-700: #334155;
            --slate-500: #64748B;
            --slate-100: #F1F5F9;
            --slate-50: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--slate-50);
            color: var(--slate-700);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        .hero-slant {
            clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-slant {
                clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
            }
        }
        .section-separator {
            border-bottom: 1px solid #E2E8F0;
        }
        .transition-soft {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
        }