/* roulang page: index */
:root {
            --primary: #10B981;
            --primary-dark: #0D9488;
            --secondary: #6366F1;
            --dark: #0F172A;
            --surface: #F8FAFC;
            --text-main: #334155;
            --text-title: #0F172A;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
        }

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

        .hero-banner-bg {
            background-image: linear-gradient(rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.92)), url('/assets/images/d4b72c2a00693d3d.webp');
            background-size: cover;
            background-position: center;
        }

        .card-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            transition: all 0.25s ease-out;
        }

        .card-shadow:hover {
            box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.1);
            transform: translateY(-4px);
        }

        .btn-focus {
            min-height: 44px;
            min-width: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
        }

        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }

        .sticky-cta-bar {
            transform: translateY(100%);
            transition: transform 0.3s ease-in-out;
        }
        .sticky-cta-bar.show {
            transform: translateY(0);
        }