/* roulang page: index */
:root {
            --primary-blue: #1d4ed8;
            --primary-dark: #0f172a;
            --accent-orange: #ea580c;
            --surface-bg: #f8fafc;
            --card-border: #e2e8f0;
            --text-main: #1e293b;
            --text-muted: #64748b;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--surface-bg);
            color: var(--text-main);
            overflow-x: hidden;
        }

        .skew-hero-bg {
            clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
        }

        @media (max-width: 768px) {
            .skew-hero-bg {
                clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
            }
        }

        .card-elevated {
            background: #ffffff;
            border: 1px solid var(--card-border);
            box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
            transition: all 0.25s ease-in-out;
        }

        .card-elevated:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
            border-color: #cbd5e1;
        }

        .gradient-border-highlight {
            border: 2px solid #2563eb;
            position: relative;
        }

        .custom-scroll-bar::-webkit-scrollbar {
            height: 6px;
        }
        .custom-scroll-bar::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        .custom-scroll-bar::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 4px;
        }