/* roulang page: index */
:root {
            --primary: #0F52BA;
            --primary-teal: #00A896;
            --accent-cyan: #00E5FF;
            --warning-amber: #FFB703;
            --color-heading: #0F172A;
            --color-body: #334155;
            --color-muted: #64748B;
            --bg-light: #F8FAFC;
            --bg-alt: #EDF2F7;
            --radius-card: 1.5rem;
            --shadow-float: 0 10px 30px -5px rgba(15, 82, 186, 0.08);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--color-body);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .hero-diagonal {
            clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
        }
        .hero-diagonal-overlay {
            background: linear-gradient(135deg, rgba(10, 17, 40, 0.94) 0%, rgba(15, 82, 186, 0.88) 55%, rgba(0, 168, 150, 0.82) 100%);
        }
        .card-custom {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-float);
            border: 1px solid rgba(226, 232, 240, 0.9);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: 0 20px 35px -8px rgba(15, 82, 186, 0.16);
            border-color: rgba(0, 168, 150, 0.4);
        }
        .nav-glass {
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
        }