/* roulang page: index */
:root {
            --primary: #0F52BA;
            --primary-dark: #1E40AF;
            --secondary: #0D9488;
            --bg-light: #F8FAFC;
            --surface: #FFFFFF;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius-base: 12px;
            --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            --shadow-hover: 0 20px 25px -5px rgba(15, 82, 186, 0.12), 0 8px 10px -6px rgba(15, 82, 186, 0.08);
        }
        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .bento-hero {
            background-image: linear-gradient(135deg, rgba(255,255,255,0.92) 0%, rgba(240,247,255,0.85) 100%), url('/assets/images/2dd213e5984d48be.webp');
            background-size: cover;
            background-position: center;
        }
        .dark-tech-block {
            background-color: #0b132b;
            background-image: radial-gradient(circle at 20% 20%, rgba(15, 82, 186, 0.25) 0%, transparent 50%), radial-gradient(circle at 80% 80%, rgba(13, 148, 136, 0.2) 0%, transparent 50%);
        }