/* roulang page: index */
:root {
            --primary: #F95721;
            --primary-hover: #E04410;
            --text-main: #1E2229;
            --text-muted: #5E6470;
            --bg-page: #FFFFFF;
            --bg-subtle: #FAFAFA;
            --bg-dark: #0F141C;
            --border-color: #EAECEF;
            --radius-box: 16px;
            --shadow-soft: 0 4px 20px -2px rgba(15, 20, 28, 0.06);
            --shadow-hover: 0 12px 30px -4px rgba(249, 87, 33, 0.12);
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-page);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        .heading-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            background-color: #FFF0EB;
            color: #F95721;
        }

        .card-surface {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-box);
            box-shadow: var(--shadow-soft);
            transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .card-surface:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(249, 87, 33, 0.3);
        }

        .details-summary::-webkit-details-marker {
            display: none;
        }

        .details-summary {
            list-style: none;
        }

        details[open] summary svg {
            transform: rotate(180deg);
        }