/* roulang page: index */
:root {
            --primary: #0F172A;
            --accent: #00D285;
            --accent-hover: #00B874;
            --blue: #2563EB;
            --night: #0B0F19;
            --text-main: #334155;
            --text-dark: #0F172A;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            overflow-x: hidden;
        }

        /* 统一平滑阴影与工业质感边框 */
        .card-industrial {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: 1rem;
            box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-industrial:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
            border-color: rgba(0, 210, 133, 0.4);
        }

        .card-industrial-dark {
            background: #151D2F;
            border: 1px solid #1E293B;
            border-radius: 1rem;
            transition: all 0.3s ease;
        }
        .card-industrial-dark:hover {
            border-color: #00D285;
            box-shadow: 0 10px 25px -5px rgba(0, 210, 133, 0.15);
        }

        /* 手风琴原生微动效 */
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }

        /* 移动端吸底栏渐显 */
        #mobile-bottom-bar {
            transform: translateY(100%);
            transition: transform 0.3s ease-in-out;
        }
        #mobile-bottom-bar.show {
            transform: translateY(0);
        }