.container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 24px;
        }

        /* Header */
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            margin-bottom: 40px;
            border-bottom: 2px solid var(--border-color);
        }

        .logo-section {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .logo {
            height: 32px;
            width: auto;
        }

        .logo-divider {
            width: 1px;
            height: 24px;
            background: var(--border-color);
        }

        .logo-subtitle {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
        }

        .logo-subtitle:hover {
            color: var(--transcend-blue);
        }

        .nav-link {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.15s ease;
        }

        .nav-link:hover {
            color: var(--transcend-blue);
        }

        .nav-link.active {
            color: var(--transcend-blue);
            font-weight: 600;
        }

        /* Tooltip System */
        .term {
            position: relative;
            display: inline-block;
            border-bottom: 2px dotted var(--transcend-blue);
            color: var(--transcend-blue);
            cursor: help;
            font-weight: 600;
        }

        .term .tooltip {
            visibility: hidden;
            width: 260px;
            background-color: #1a202c;
            color: #fff;
            text-align: left;
            border-radius: 6px;
            padding: 12px 14px;
            position: absolute;
            z-index: 100;
            bottom: 125%;
            left: 50%;
            margin-left: -130px;
            opacity: 0;
            transition: opacity 0.2s ease;
            font-size: 0.8rem;
            font-weight: normal;
            line-height: 1.5;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
        }

        .term .tooltip::after {
            content: "";
            position: absolute;
            top: 100%;
            left: 50%;
            margin-left: -6px;
            border-width: 6px;
            border-style: solid;
            border-color: #1a202c transparent transparent transparent;
        }

        .term:hover .tooltip {
            visibility: visible;
            opacity: 1;
        }

        .tooltip strong {
            color: #60a5fa;
            display: block;
            margin-bottom: 4px;
        }

        /* Confidential Banner */
        .confidential-banner {
            background: #1e3a8a;
            border-radius: 6px;
            padding: 10px 16px;
            max-width: 900px;
            margin: 50px auto 24px auto;
            text-align: center;
            font-size: 0.75rem;
            font-weight: 600;
            color: #ffffff;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* Guide Header */
        .guide-header {
            max-width: 900px;
            margin: 0 auto 48px auto;
            text-align: center;
        }

        .guide-header h1 {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .guide-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto 16px;
            line-height: 1.6;
        }

        .guide-meta {
            display: flex;
            justify-content: center;
            gap: 8px;
        }

        .guide-tag {
            font-size: 0.75rem;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 12px;
            background: var(--transcend-light);
            color: var(--transcend-blue);
        }

        .guide-tag.marketing {
            background: #e8f4e8;
            color: #2d5a2d;
        }

        /* Guide Content */
        .guide-content {
            max-width: 900px;
            margin: 0 auto;
        }

        /* Section */
        .section {
            margin-bottom: 48px;
        }

        .section h2 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-color);
        }

        .section h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 24px 0 12px;
        }

        .section p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .section ul {
            margin: 12px 0;
            padding-left: 20px;
        }

        .section li {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        /* Key Insight Box */
        .insight-box {
            background: #fffbeb;
            border-left: 4px solid var(--warning-amber);
            padding: 16px 20px;
            border-radius: 0 6px 6px 0;
            margin: 16px 0;
        }

        .insight-box h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .insight-box p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Formula Box */
        .formula-box {
            background: #f8fafc;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 20px;
            margin: 16px 0;
            text-align: center;
        }

        .formula-box .formula {
            font-family: 'SF Mono', Monaco, 'Courier New', monospace;
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .formula-box .formula-explanation {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* ==================== FLOWCHART IMAGE ==================== */
        .flowchart-container {
            background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 20px;
            margin: 16px auto;
            text-align: center;
            max-width: 650px;
        }

        .flowchart-image {
            max-width: 100%;
            height: auto;
            border-radius: 6px;
        }

        .flowchart-caption {
            margin-top: 16px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-style: italic;
        }

        /* Nuance Box */
        .nuance-box {
            background: #f0f9ff;
            border-left: 4px solid var(--transcend-blue);
            padding: 16px 20px;
            border-radius: 0 6px 6px 0;
            margin-top: 12px;
            font-size: 0.85rem;
            color: #1e4278;
            line-height: 1.6;
        }

        /* Warning Box */
        .warning-box {
            background: #fff0f0;
            border-left: 4px solid #dc2626;
            padding: 16px 20px;
            border-radius: 0 6px 6px 0;
            margin: 16px 0;
            font-size: 0.9rem;
            color: #8b2d2d;
            line-height: 1.6;
        }

        .warning-box h4 {
            font-weight: 600;
            margin-bottom: 8px;
            color: #991b1b;
        }

        /* Success Box */
        .success-box {
            background: #e8f4e8;
            border-left: 4px solid #27ae60;
            padding: 16px 20px;
            border-radius: 0 6px 6px 0;
            margin: 16px 0;
        }

        .success-box h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #2d5a2d;
            margin-bottom: 8px;
        }

        .success-box p, .success-box li {
            font-size: 0.9rem;
            color: #2d5a2d;
            line-height: 1.6;
        }

        /* Platform Cards */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin: 16px 0;
        }

        .platform-card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 20px;
        }

        .platform-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .platform-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Summary Table */
        .summary-table {
            width: 100%;
            border-collapse: collapse;
            margin: 12px 0;
            font-size: 0.9rem;
        }

        .summary-table th {
            background: var(--transcend-blue);
            color: white;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }

        .summary-table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-color);
        }

        .summary-table tr:nth-child(even) {
            background: #f9fafb;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .header {
                flex-direction: column;
                gap: 16px;
            }

            .diagnostic-grid,
            .platform-grid {
                grid-template-columns: 1fr;
            }
        }

body {
    overflow-x: hidden;
}

.executive-summary,
.access-summary,
.source-freshness {
    border-bottom: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    margin: 24px 0;
    padding: 20px 0;
}

.executive-summary h2 {
    border-bottom: none;
    margin-top: 0;
    padding-bottom: 0;
}

.access-summary,
.roas-route-groups {
    display: grid;
    gap: 16px;
}

.access-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.roas-route-groups {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin: 24px 0;
}

.roas-route-groups a {
    border-top: 3px solid var(--transcend-blue);
    color: var(--text-primary);
    padding-top: 12px;
    text-decoration: none;
}

.roas-route-groups strong,
.roas-route-groups span,
.access-label,
.source-label {
    display: block;
}

.roas-route-groups strong {
    margin-bottom: 6px;
}

.roas-route-groups span,
.access-summary span:last-child,
.source-freshness p,
.auth-copy-muted,
.comments-empty-help,
.footer-note {
    color: var(--text-secondary);
}

.access-label,
.source-label {
    color: var(--transcend-blue);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.auth-copy {
    margin: 20px 0;
}

.comments-empty-help {
    font-size: 12px;
    margin-top: 8px;
}

.footer-note {
    margin-top: 8px;
}

.inline-list {
    margin: 8px 0;
    padding-left: 20px;
}

.summary-table {
    table-layout: fixed;
}

.summary-table th,
.summary-table td {
    overflow-wrap: anywhere;
    vertical-align: top;
}

@media (max-width: 1024px) {
    .roas-route-groups {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .guide-header {
        text-align: left;
    }

    .guide-header h1 {
        font-size: 1.6rem;
    }

    .access-summary,
    .roas-route-groups,
    .diagnostic-grid,
    .platform-grid {
        grid-template-columns: 1fr;
    }

    .term .tooltip {
        left: 0;
        margin-left: 0;
        width: min(260px, calc(100vw - 64px));
    }
}