/* roulang page: index */
:root {
            --primary: #0F1E36;
            --primary-dark: #0B132B;
            --accent: #00D696;
            --accent-glow: rgba(0, 214, 150, 0.35);
            --bg-light: #F8FAFC;
            --text-dark: #0F172A;
            --text-gray: #334155;
            --text-muted: #64748B;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        /* 标题行高紧凑 */
        h1, h2, h3, h4, h5, h6 {
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        /* 交互微光效 */
        .glow-accent {
            box-shadow: 0 0 25px var(--accent-glow);
        }

        .hero-mesh {
            background-image: radial-gradient(rgba(0, 214, 150, 0.12) 1px, transparent 1px), radial-gradient(rgba(15, 30, 54, 0.08) 1px, transparent 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }

        .dark-mesh {
            background-color: #060B14;
            background-image: radial-gradient(rgba(0, 214, 150, 0.15) 1px, transparent 1px);
            background-size: 28px 28px;
        }

        /* 隐藏滚动条 */
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        /* FAQ 手风琴动画 */
        .faq-content {
            transition: max-height 0.3s ease-out, opacity 0.25s ease-out;
        }