/* roulang page: index */
:root {
            --primary: #10B981;
            --secondary: #F97316;
            --bg-dark: #0F172A;
            --card-dark: #1E293B;
            --text-main: #0F172A;
            --text-muted: #64748B;
        }
        html { scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; }
        .gradient-text-lime {
            background: linear-gradient(135deg, #10B981 0%, #059669 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .gradient-text-orange {
            background: linear-gradient(135deg, #F97316 0%, #EA580C 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        details > summary { list-style: none; }
        details > summary::-webkit-details-marker { display: none; }
        details[open] summary svg { transform: rotate(180deg); }