/* roulang page: index */
:root {
            --fp-primary: #0B3B24;
            --fp-primary-dark: #072617;
            --fp-primary-light: #135837;
            --fp-accent: #10B981;
            --fp-accent-bright: #00C853;
            --fp-accent-subtle: #DCFCE7;
            --fp-accent-dark: #15803D;
            --fp-dark: #0F172A;
            --fp-slate: #1E293B;
            --fp-text: #334155;
            --fp-muted: #64748B;
            --fp-border: #E2E8F0;
            --fp-bg-light: #F8FAFC;
            --fp-bg-white: #FFFFFF;
            --fp-radius: 12px;
            --fp-radius-lg: 16px;
            --fp-radius-sm: 8px;
            --fp-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --fp-shadow-hover: 0 14px 28px -4px rgba(11, 59, 36, 0.12);
            --fp-transition: all 0.25s ease-in-out;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--fp-text);
            background-color: var(--fp-bg-light);
            line-height: 1.75;
            padding-top: 76px;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--fp-dark);
            font-weight: 700;
            line-height: 1.35;
        }

        a {
            color: var(--fp-primary);
            text-decoration: none;
            transition: var(--fp-transition);
        }
        a:hover {
            color: var(--fp-accent-dark);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            height: 76px;
        }
        .navbar-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--fp-primary) !important;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .navbar-brand i {
            font-size: 1.5rem;
            color: var(--fp-accent);
        }
        .nav-link {
            font-weight: 600;
            color: var(--fp-slate) !important;
            padding: 0.5rem 1rem !important;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--fp-accent-dark) !important;
        }

        .btn-custom-primary {
            background-color: var(--fp-primary);
            color: #ffffff;
            font-weight: 600;
            border-radius: var(--fp-radius-sm);
            padding: 0.65rem 1.4rem;
            border: 1px solid var(--fp-primary);
            transition: var(--fp-transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-custom-primary:hover {
            background-color: var(--fp-accent-dark);
            border-color: var(--fp-accent-dark);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(16, 185, 129, 0.25);
        }
        .btn-custom-outline {
            background-color: transparent;
            color: var(--fp-primary);
            font-weight: 600;
            border-radius: var(--fp-radius-sm);
            padding: 0.65rem 1.4rem;
            border: 1.5px solid var(--fp-primary);
            transition: var(--fp-transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-custom-outline:hover {
            background-color: var(--fp-primary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .badge-fp {
            background-color: var(--fp-accent-subtle);
            color: var(--fp-accent-dark);
            font-weight: 600;
            font-size: 0.8rem;
            padding: 0.35rem 0.75rem;
            border-radius: 4px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .badge-fp-dark {
            background-color: rgba(255, 255, 255, 0.15);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.8rem;
            padding: 0.35rem 0.75rem;
            border-radius: 4px;
        }

        .fp-section {
            padding: 5rem 0;
            border-bottom: 1px solid var(--fp-border);
        }
        .fp-section-dark {
            background-color: var(--fp-dark);
            color: #E2E8F0;
            border-bottom: 1px solid #1E293B;
        }
        .fp-section-dark h2, .fp-section-dark h3, .fp-section-dark h4 {
            color: #ffffff;
        }
        .fp-section-dark p {
            color: #94A3B8;
        }

        .section-header {
            margin-bottom: 3rem;
        }
        .section-header .section-subtitle {
            color: var(--fp-accent-dark);
            font-weight: 700;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 0.5rem;
        }
        .fp-section-dark .section-header .section-subtitle {
            color: var(--fp-accent);
        }
        .section-header h2 {
            font-size: 2.1rem;
            margin-bottom: 1rem;
        }
        .section-header p {
            max-width: 780px;
            margin: 0 auto;
            color: var(--fp-muted);
            font-size: 1.05rem;
        }

        .fp-card {
            background: var(--fp-bg-white);
            border-radius: var(--fp-radius);
            border: 1px solid var(--fp-border);
            padding: 2rem;
            box-shadow: var(--fp-shadow);
            transition: var(--fp-transition);
            height: 100%;
        }
        .fp-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--fp-shadow-hover);
            border-color: rgba(16, 185, 129, 0.3);
        }

        /* Hero */
        .hero-banner {
            background: linear-gradient(135deg, #072617 0%, #0B3B24 60%, #135837 100%);
            color: #ffffff;
            padding: 5rem 0 4.5rem;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .hero-banner::after {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.15) 0%, transparent 50%);
            pointer-events: none;
        }
        .hero-h1 {
            color: #ffffff;
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.25rem;
        }
        .hero-lead {
            color: #D1FAE5;
            font-size: 1.15rem;
            margin-bottom: 2rem;
            line-height: 1.8;
        }
        .hero-board-card {
            background: rgba(15, 23, 42, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(16px);
            border-radius: var(--fp-radius-lg);
            padding: 1.75rem;
            color: #ffffff;
        }

        /* Nav Tabs Custom */
        .nav-pills-fp .nav-link {
            background: #ffffff;
            color: var(--fp-slate) !important;
            border: 1px solid var(--fp-border);
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            border-radius: 8px;
            font-weight: 600;
            padding: 0.6rem 1.2rem !important;
        }
        .nav-pills-fp .nav-link.active {
            background: var(--fp-primary) !important;
            color: #ffffff !important;
            border-color: var(--fp-primary);
        }

        /* Timeline */
        .timeline-step {
            position: relative;
            padding-left: 2.5rem;
            margin-bottom: 2rem;
        }
        .timeline-step::before {
            content: '';
            position: absolute;
            left: 0.75rem;
            top: 2rem;
            bottom: -2rem;
            width: 2px;
            background-color: var(--fp-border);
        }
        .timeline-step:last-child::before {
            display: none;
        }
        .timeline-step-icon {
            position: absolute;
            left: 0;
            top: 0.25rem;
            width: 1.6rem;
            height: 1.6rem;
            border-radius: 50%;
            background-color: var(--fp-primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
        }

        /* FAQ Accordion */
        .accordion-item {
            border: 1px solid var(--fp-border);
            border-radius: var(--fp-radius) !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .accordion-button {
            font-weight: 700;
            color: var(--fp-dark);
            background-color: #ffffff;
            padding: 1.25rem;
        }
        .accordion-button:not(.collapsed) {
            color: var(--fp-primary);
            background-color: var(--fp-accent-subtle);
            box-shadow: none;
        }
        .accordion-body {
            color: var(--fp-text);
            line-height: 1.8;
            padding: 1.25rem;
            background-color: #ffffff;
        }

        /* Footer */
        .site-footer {
            background-color: var(--fp-dark);
            color: #94A3B8;
            padding: 4.5rem 0 2rem;
            border-top: 1px solid #1E293B;
            font-size: 0.95rem;
        }
        .site-footer h5 {
            color: #ffffff;
            font-size: 1.1rem;
            margin-bottom: 1.25rem;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 0.75rem;
        }
        .site-footer a {
            color: #94A3B8;
        }
        .site-footer a:hover {
            color: var(--fp-accent);
        }
        .footer-bottom {
            margin-top: 3.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #1E293B;
            font-size: 0.85rem;
        }

        @media (max-width: 991.98px) {
            .hero-h1 { font-size: 2rem; }
            .section-header h2 { font-size: 1.75rem; }
            .fp-section { padding: 3.5rem 0; }
        }