/* roulang page: index */
:root {
            --brand-main: #0d7a5f;
            --brand-dark: #0a6c54;
            --brand-accent: #f97316;
            --text-main: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --bg-canvas: #f8fafc;
            --bg-card: #ffffff;
            --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-float: 0 12px 32px -4px rgba(13, 122, 95, 0.12);
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-body);
            background-color: var(--bg-canvas);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        .hero-bg {
            background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 253, 244, 0.92) 100%), url('/assets/images/50d8f6b5a1048745.jpg');
            background-size: cover;
            background-position: center;
        }
        .dark-case-bg {
            background-image: radial-gradient(circle at 80% 20%, rgba(13, 122, 95, 0.25) 0%, transparent 50%), linear-gradient(180deg, #0f172a 0%, #090d16 100%), url('/assets/images/d7f95bc64f900597.jpg');
            background-size: cover;
            background-blend-mode: overlay;
        }
        .card-shadow {
            box-shadow: var(--shadow-subtle);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-float);
        }