/* roulang page: index */
:root {
            --primary: #7C3AED;
            --primary-dark: #6D28D9;
            --accent-cyan: #06B6D4;
            --accent-pink: #EC4899;
            --bg-canvas: #0B0F19;
            --bg-surface: #111827;
            --text-main: #F9FAFB;
            --text-body: #E5E7EB;
            --text-muted: #9CA3AF;
            --border-glow: rgba(255, 255, 255, 0.1);
            --radius-box: 1.25rem;
        }

        body {
            background-color: var(--bg-canvas);
            color: var(--text-body);
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.75;
            overflow-x: hidden;
        }

        /* 顶部倾斜切角背景 */
        .hero-slant {
            clip-path: polygon(0 0, 100% 0, 100% calc(100% - 5vw), 0 100%);
        }

        .glass-card {
            background: rgba(17, 24, 39, 0.72);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(14px);
            border-radius: var(--radius-box);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .glass-card:hover {
            transform: translateY(-5px);
            border-color: rgba(6, 182, 212, 0.4);
            box-shadow: 0 12px 30px -10px rgba(124, 58, 237, 0.35);
        }

        .btn-neon {
            background: linear-gradient(135deg, #7C3AED 0%, #06B6D4 100%);
            box-shadow: 0 0 20px rgba(124, 58, 237, 0.45);
            transition: all 0.25s ease;
        }

        .btn-neon:hover {
            transform: scale(1.02);
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.65);
        }

        /* 隐藏原生滚动条但保留功能 */
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }

        .accordion-active .accordion-content {
            max-height: 240px;
        }

        .accordion-active .accordion-icon {
            transform: rotate(180deg);
            color: #06B6D4;
        }