/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-dark: #0f172a;
            --accent: #0d9488;
            --bg-light: #f8fafc;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --card-hover-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
        }
        body {
            color: var(--text-main);
            background-color: #ffffff;
            overflow-x: hidden;
        }
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        .soft-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 0.75rem;
            box-shadow: var(--card-shadow);
            transition: all 0.25s ease;
        }
        .soft-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--card-hover-shadow);
        }
        .btn-brand {
            background-color: var(--primary);
            color: #ffffff;
            transition: all 0.2s ease;
        }
        .btn-brand:hover {
            background-color: #1d4ed8;
            transform: translateY(-1px);
        }
        .btn-accent {
            background-color: var(--accent);
            color: #ffffff;
            transition: all 0.2s ease;
        }
        .btn-accent:hover {
            background-color: #0f766e;
            transform: translateY(-1px);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
        }
        .accordion-item.active .accordion-content {
            max-height: 1000px;
            transition: max-height 0.3s ease-in-out;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }
        .hero-slide {
            display: none;
            opacity: 0;
            transition: opacity 0.5s ease-in-out;
        }
        .hero-slide.active {
            display: block;
            opacity: 1;
        }