/* roulang page: index */
:root {
            --primary: #0F4C81;
            --primary-dark: #0B1120;
            --accent: #0D9488;
            --accent-warm: #D97706;
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-light: #E2E8F0;
            --bg-light: #F8FAFC;
        }

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

        body {
            background-color: #F8FAFC;
            color: var(--text-main);
            overflow-x: hidden;
        }

        .hero-banner-bg {
            background-image: linear-gradient(135deg, rgba(11, 17, 32, 0.94) 0%, rgba(15, 76, 129, 0.88) 100%), url('/assets/images/ab1fe3ba1eb261fe.png');
            background-size: cover;
            background-position: center;
        }

        .feature-card {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(15, 76, 129, 0.1), 0 8px 10px -6px rgba(15, 76, 129, 0.1);
        }

        .dark-section-bg {
            background-image: linear-gradient(180deg, #0B1120 0%, #0F172A 100%), url('/assets/images/591e527dbd75ca2c.webp');
            background-size: cover;
            background-blend-mode: overlay;
        }

        .btn-glow {
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px 0 rgba(13, 148, 136, 0.39);
        }

        .btn-glow:hover {
            box-shadow: 0 6px 20px rgba(13, 148, 136, 0.55);
            transform: translateY(-1px);
        }

        .btn-glow:active {
            transform: translateY(1px);
        }