/* roulang page: index */
:root {
            --color-ink: #0F172A;
            --color-jade: #0D9488;
            --color-jade-hover: #059669;
            --color-amber: #D97706;
            --color-bg-light: #F8FAFC;
            --color-border: rgba(226, 232, 240, 0.9);
            --shadow-soft: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 4px 10px -2px rgba(15, 23, 42, 0.02);
            --shadow-elevated: 0 20px 35px -8px rgba(13, 148, 136, 0.12), 0 8px 16px -4px rgba(15, 23, 42, 0.04);
        }

        html {
            scroll-behavior: smooth;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background-color: var(--color-bg-light);
            color: #334155;
            line-height: 1.68;
            overflow-x: hidden;
        }

        .custom-card-shadow {
            box-shadow: var(--shadow-soft);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .custom-card-shadow:hover {
            box-shadow: var(--shadow-elevated);
            transform: translateY(-3px);
        }

        .glass-panel {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.7);
        }

        .dark-glass-panel {
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(51, 65, 85, 0.6);
        }

        .tabular-nums {
            font-variant-numeric: tabular-nums;
        }

        .hero-pattern {
            background-image: radial-gradient(rgba(13, 148, 136, 0.12) 1px, transparent 1px);
            background-size: 28px 28px;
        }

        .pulse-light {
            box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
            animation: pulse-ring 2s infinite cubic-bezier(0.66, 0, 0, 1);
        }

        @keyframes pulse-ring {
            to {
                box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
            }
        }