/* roulang page: index */
:root {
            --primary: #0F766E;
            --primary-light: #0D9488;
            --dark: #0F172A;
            --slate-body: #334155;
            --slate-muted: #64748B;
            --bg-light: #F8FAFC;
        }
        body {
            color: var(--slate-body);
            background-color: #FFFFFF;
            line-height: 1.75;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            scroll-behavior: smooth;
        }
        .header-glow {
            box-shadow: 0 4px 20px -2px rgba(15, 118, 110, 0.08);
        }
        .card-hover {
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-hover: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);
        }
        .btn-gradient {
            background: linear-gradient(135deg, #0D9488 0%, #0F766E 100%);
            transition: all 0.2s ease;
        }
        .btn-gradient:hover {
            background: linear-gradient(135deg, #14B8A6 0%, #0D9488 100%);
            transform: translateY(-2px);
            box-shadow: 0 8px 16px -4px rgba(13, 148, 136, 0.35);
        }
        .btn-gradient:active {
            transform: translateY(0);
        }
        .badge-pulse {
            animation: pulse-glow 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
        }
        @keyframes pulse-glow {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.6; }
        }
        .phone-mockup-frame {
            box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.1);
        }