/* roulang page: index */
:root {
            --primary: #FF5500;
            --primary-dark: #0F172A;
            --text-main: #334155;
            --text-light: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            line-height: 1.75;
        }
        .hero-video-bg {
            background-image: linear-gradient(rgba(15, 23, 42, 0.78), rgba(15, 23, 42, 0.88)), url('/assets/images/92afba7ce21d92d5.jpg');
            background-size: cover;
            background-position: center;
        }
        .section-alt {
            background-color: #F8FAFC;
        }
        .dark-surface {
            background-color: #0F172A;
        }
        .card-shadow {
            border: 1px solid rgba(226, 232, 240, 0.9);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
            border-color: #CBD5E1;
        }
        .btn-brand {
            background-color: #FF5500;
            color: #FFFFFF;
            transition: all 0.25s ease;
        }
        .btn-brand:hover {
            background-color: #E04B00;
            transform: translateY(-2px);
            box-shadow: 0 8px 16px -4px rgba(255, 85, 0, 0.35);
        }
        .cta-pulse {
            animation: pulse-border 2.2s infinite;
        }
        @keyframes pulse-border {
            0% { box-shadow: 0 0 0 0 rgba(255, 85, 0, 0.6); }
            70% { box-shadow: 0 0 0 14px rgba(255, 85, 0, 0); }
            100% { box-shadow: 0 0 0 0 rgba(255, 85, 0, 0); }
        }