/* roulang page: index */
:root {
            --color-primary: #00D084;
            --color-dark: #0B0F19;
            --color-accent: #FF5722;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #1F2937;
            background-color: #FFFFFF;
            line-height: 1.75;
        }
        .text-tight {
            letter-spacing: -0.02em;
        }
        .card-hover {
            transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease;
        }
        .card-hover:hover {
            transform: translateY(-2px);
            border-color: #00D084;
            box-shadow: 0 10px 25px -5px rgba(0, 208, 132, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
        }
        .btn-gradient {
            background-color: #00D084;
            color: #0B0F19;
            font-weight: 600;
            transition: all 0.2s ease;
        }
        .btn-gradient:hover {
            background-color: #10B981;
            box-shadow: 0 4px 14px rgba(0, 208, 132, 0.39);
            transform: translateY(-1px);
        }
        details > summary::-webkit-details-marker {
            display: none;
        }