/* roulang page: index */
:root {
            --primary: #0D3B4C;
            --primary-dark: #06151E;
            --accent: #10B981;
            --bg-paper: #F8FAFC;
            --text-dark: #0F172A;
            --text-body: #334155;
            --border-light: #E2E8F0;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans", sans-serif;
            color: var(--text-body);
            background-color: var(--bg-paper);
            line-height: 1.75;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 { color: var(--text-dark); line-height: 1.35; font-weight: 700; }
        a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
        img { max-width: 100%; height: auto; display: block; }
        
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .btn-emerald {
            background-color: #10B981;
            color: #ffffff;
            font-weight: 600;
            padding: 0.85rem 1.85rem;
            border-radius: 0.5rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.35);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-emerald:hover {
            background-color: #059669;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px 0 rgba(16, 185, 129, 0.45);
        }
        .btn-dark {
            background-color: #0D3B4C;
            color: #ffffff;
            font-weight: 600;
            padding: 0.85rem 1.85rem;
            border-radius: 0.5rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        .btn-dark:hover {
            background-color: #06151E;
            transform: translateY(-2px);
        }

        .card-shadow {
            background: #ffffff;
            border: 1px solid #E2E8F0;
            border-radius: 0.75rem;
            box-shadow: 0 10px 30px -5px rgba(13, 59, 76, 0.06);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 35px -10px rgba(13, 59, 76, 0.12);
            border-color: #CBD5E1;
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.35rem 0.95rem;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 600;
        }

        .gradient-mesh {
            background: linear-gradient(135deg, rgba(6, 21, 30, 0.92) 0%, rgba(13, 59, 76, 0.88) 100%);
        }