/* roulang page: index */
:root {
            --brand-primary: #0F766E;
            --brand-teal: #0D9488;
            --brand-accent: #0284C7;
            --brand-warn: #D97706;
            --bg-clean: #F8FAFC;
            --bg-subtle: #F1F5F9;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --shadow-soft: 0 4px 20px -2px rgba(15, 118, 110, 0.08);
            --shadow-hover: 0 12px 30px -4px rgba(15, 118, 110, 0.16);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-clean);
            color: var(--text-body);
            line-height: 1.8;
            letter-spacing: 0.015em;
        }

        .heading-tight {
            letter-spacing: -0.02em;
            color: var(--text-heading);
        }

        .hero-glow {
            background: radial-gradient(circle at 75% 20%, rgba(204, 251, 241, 0.5) 0%, rgba(240, 253, 250, 0.2) 50%, transparent 80%);
        }

        .card-custom {
            background-color: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: 1rem;
            box-shadow: var(--shadow-soft);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: #CCFBF1;
        }

        .dark-card-custom {
            background: rgba(30, 41, 59, 0.85);
            border: 1px solid rgba(13, 148, 136, 0.25);
            backdrop-filter: blur(12px);
            border-radius: 1rem;
            transition: all 0.3s ease;
        }

        .dark-card-custom:hover {
            border-color: #14B8A6;
            box-shadow: 0 10px 30px rgba(20, 184, 166, 0.15);
            transform: translateY(-3px);
        }

        .btn-primary-gradient {
            background: linear-gradient(135deg, #0F766E 0%, #0D9488 100%);
            box-shadow: 0 4px 14px rgba(15, 118, 110, 0.25);
            transition: all 0.25s ease;
        }

        .btn-primary-gradient:hover {
            background: linear-gradient(135deg, #115E59 0%, #0F766E 100%);
            box-shadow: 0 6px 20px rgba(15, 118, 110, 0.35);
            transform: translateY(-1px);
        }

        .status-dot-pulse {
            position: relative;
        }

        .status-dot-pulse::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border-radius: 9999px;
            background-color: inherit;
            animation: pulse-ring 2s cubic-bezier(0.24, 0, 0.38, 1) infinite;
        }

        @keyframes pulse-ring {
            0% { transform: scale(0.95); opacity: 0.8; }
            50% { transform: scale(1.8); opacity: 0; }
            100% { transform: scale(0.95); opacity: 0; }
        }