/* roulang page: index */
:root {
            --primary: #0F52BA;
            --primary-dark: #0A387E;
            --accent: #00A8E8;
            --mint: #10B981;
            --bg-base: #FFFFFF;
            --bg-muted: #F8FAFC;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        .hero-banner-bg {
            background: linear-gradient(135deg, rgba(11, 19, 43, 0.88) 0%, rgba(15, 82, 186, 0.8) 100%), url('/assets/images/5f5e750e6cd0a3d3.webp') center/cover no-repeat;
        }

        .dark-tech-section {
            background: linear-gradient(180deg, #0B132B 0%, #060b18 100%);
        }

        .custom-scrollbar::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        .custom-scrollbar::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 4px;
        }

        details > summary::-webkit-details-marker {
            display: none;
        }