/* roulang page: index */
:root {
            --brand-blue: #1D4ED8;
            --brand-blue-hover: #1e40af;
            --brand-cyan: #06B6D4;
            --dark-navy: #0F172A;
            --slate-800: #1E293B;
            --slate-700: #334155;
            --slate-600: #475569;
            --slate-500: #64748B;
            --slate-100: #F1F5F9;
            --slate-50: #F8FAFC;
            --line-border: #E2E8F0;
            --shadow-subtle: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
            --shadow-float: 0 20px 25px -5px rgba(15, 23, 42, 0.09), 0 12px 14px -6px rgba(15, 23, 42, 0.05);
            --radius-card: 16px;
            --radius-btn: 8px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--slate-800);
            background-color: #FFFFFF;
            line-height: 1.65;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--dark-navy);
            font-weight: 700;
            line-height: 1.3;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* Top Announcement Bar */
        .top-notification {
            background-color: #EFF6FF;
            color: var(--brand-blue);
            font-size: 0.875rem;
            border-bottom: 1px solid #DBEAFE;
            padding: 8px 0;
            font-weight: 500;
        }

        /* Header / SaaS Command Bar */
        .header-navbar {
            background: #FFFFFF;
            border-bottom: 1px solid var(--line-border);
            position: sticky;
            top: 0;
            z-index: 1020;
            box-shadow: 0 1px 3px 0 rgba(15, 23, 42, 0.04);
        }

        .navbar-brand-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--dark-navy);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .navbar-brand-text span {
            color: var(--brand-blue);
        }

        .nav-link {
            font-weight: 500;
            color: var(--slate-600) !important;
            padding: 0.5rem 0.85rem !important;
            border-radius: 6px;
            transition: all 0.2s ease;
        }

        .nav-link:hover {
            color: var(--brand-blue) !important;
            background-color: var(--slate-50);
        }

        .cmd-search-box {
            background-color: var(--slate-50);
            border: 1px solid var(--line-border);
            border-radius: 8px;
            padding: 6px 12px;
            font-size: 0.8125rem;
            color: var(--slate-500);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            user-select: none;
        }

        .cmd-kbd {
            background-color: #FFFFFF;
            border: 1px solid #CBD5E1;
            border-radius: 4px;
            padding: 2px 5px;
            font-size: 0.7rem;
            font-family: monospace;
            color: var(--slate-700);
            box-shadow: 0 1px 1px rgba(0,0,0,0.05);
        }

        /* Hero: Gold/Dark Club Badge Style */
        .hero-banner-club {
            position: relative;
            background: linear-gradient(135deg, #090E17 0%, #151F32 60%, #101927 100%);
            color: #FFFFFF;
            padding: 70px 0 60px;
            overflow: hidden;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .hero-bg-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('/assets/images/5f442edccf049d8a.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }

        .gold-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 9999px;
            background: rgba(245, 158, 11, 0.12);
            border: 1px solid rgba(245, 158, 11, 0.35);
            color: #FCD34D;
            font-size: 0.8125rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .hero-title {
            color: #FFFFFF;
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
        }

        .hero-desc {
            color: #94A3B8;
            font-size: 1.05rem;
            line-height: 1.7;
            max-width: 680px;
        }

        .hero-tier-card {
            background: linear-gradient(180deg, rgba(30, 41, 59, 0.7) 0%, rgba(15, 23, 42, 0.85) 100%);
            border: 1px solid rgba(245, 158, 11, 0.25);
            border-radius: 16px;
            padding: 24px;
            backdrop-filter: blur(12px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.35);
        }

        /* Generic Section Styling */
        .section-padding {
            padding: 96px 0;
        }

        .section-alt {
            background-color: var(--slate-50);
        }

        .section-header {
            max-width: 760px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--brand-blue);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--dark-navy);
            margin-bottom: 16px;
        }

        .section-subtitle {
            color: var(--slate-500);
            font-size: 1rem;
            line-height: 1.65;
            margin: 0;
        }

        /* Card System */
        .custom-card {
            background: #FFFFFF;
            border: 1px solid var(--line-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-subtle);
            padding: 32px 28px;
            height: 100%;
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .custom-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-float);
            border-color: #CBD5E1;
        }

        .icon-box {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .icon-blue {
            background-color: #EFF6FF;
            color: var(--brand-blue);
        }

        .icon-cyan {
            background-color: #ECFEFF;
            color: var(--brand-cyan);
        }

        .icon-navy {
            background-color: #0F172A;
            color: #38BDF8;
        }

        /* Buttons */
        .btn-brand-primary {
            background-color: var(--brand-blue);
            color: #FFFFFF;
            border: 1px solid var(--brand-blue);
            font-weight: 600;
            border-radius: 8px;
            padding: 10px 22px;
            transition: all 0.2s ease;
        }

        .btn-brand-primary:hover {
            background-color: var(--brand-blue-hover);
            color: #FFFFFF;
            border-color: var(--brand-blue-hover);
        }

        .btn-brand-outline {
            background-color: transparent;
            color: var(--slate-700);
            border: 1px solid var(--line-border);
            font-weight: 600;
            border-radius: 8px;
            padding: 10px 22px;
            transition: all 0.2s ease;
        }

        .btn-brand-outline:hover {
            background-color: var(--slate-50);
            border-color: #CBD5E1;
            color: var(--dark-navy);
        }

        .btn-gold {
            background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
            color: #FFFFFF;
            font-weight: 700;
            border: none;
            border-radius: 8px;
            padding: 10px 22px;
            box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
        }

        .btn-gold:hover {
            background: linear-gradient(135deg, #D97706 0%, #B45309 100%);
            color: #FFFFFF;
        }

        /* Architecture Dark Section */
        .section-dark-navy {
            background-color: var(--dark-navy);
            color: #FFFFFF;
            padding: 100px 0;
            position: relative;
        }

        .section-dark-navy h2 {
            color: #FFFFFF;
        }

        .code-snippet-box {
            background: #090E17;
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 12px;
            padding: 24px;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 0.85rem;
            color: #38BDF8;
            line-height: 1.6;
        }

        /* Metric Stream */
        .metric-block {
            text-align: left;
            padding: 20px 0;
            border-right: 1px solid var(--line-border);
        }

        .metric-number {
            font-size: 2.75rem;
            font-weight: 800;
            color: var(--brand-blue);
            line-height: 1;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 0.9375rem;
            color: var(--slate-500);
            margin: 0;
        }

        /* Table */
        .spec-table-box {
            background: #FFFFFF;
            border: 1px solid var(--line-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }

        .table-custom {
            width: 100%;
            margin-bottom: 0;
        }

        .table-custom th {
            background-color: var(--slate-50);
            color: var(--dark-navy);
            font-weight: 700;
            padding: 16px 20px;
            border-bottom: 1px solid var(--line-border);
        }

        .table-custom td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--line-border);
            color: var(--slate-600);
            font-size: 0.9375rem;
            vertical-align: middle;
        }

        .table-custom tr:last-child td {
            border-bottom: none;
        }

        /* Steps */
        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--brand-blue);
            color: #FFFFFF;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            margin-bottom: 16px;
        }

        /* Accordion */
        .accordion-item {
            border: 1px solid var(--line-border);
            border-radius: 12px !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: none;
        }

        .accordion-button {
            font-weight: 600;
            color: var(--dark-navy);
            background-color: #FFFFFF;
            padding: 18px 22px;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            color: var(--brand-blue);
            background-color: #F8FAFC;
        }

        .accordion-body {
            padding: 18px 22px;
            color: var(--slate-600);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* Partner Logos */
        .partner-logo-box {
            background: #FFFFFF;
            border: 1px solid var(--line-border);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            font-weight: 600;
            color: var(--slate-600);
            box-shadow: var(--shadow-subtle);
        }

        /* Footer */
        .footer-main {
            background-color: #0B111E;
            color: #94A3B8;
            padding: 72px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.9375rem;
        }

        .footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-brand span {
            color: #38BDF8;
        }

        .footer-title {
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #94A3B8;
            transition: color 0.2s;
        }

        .footer-links a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            margin-top: 56px;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.8125rem;
            color: #64748B;
        }

        /* Media Queries */
        @media (max-width: 991px) {
            .section-padding {
                padding: 64px 0;
            }
            .hero-title {
                font-size: 2rem;
            }
            .metric-block {
                border-right: none;
                border-bottom: 1px solid var(--line-border);
                padding: 16px 0;
            }
        }