/* ── FAQ Page ── */

        /* Hero */
        .faq-page-hero {
            padding: 52px 0 40px;
            text-align: center;
            background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 100%);
            border-bottom: 1px solid var(--border-color);
        }

        .faq-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 5px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
        }

        .faq-page-hero h1 {
            font-size: clamp(1.65rem, 3vw, 2.4rem);
            font-weight: 600;
            letter-spacing: -0.03em;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .faq-page-hero > .container > p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        /* Search box */
        .faq-search-wrap {
            position: relative;
            max-width: 480px;
            margin: 0 auto;
        }

        .faq-search-wrap i {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: #94a3b8;
            font-size: 0.9rem;
            pointer-events: none;
        }

        .faq-search-input {
            width: 100%;
            padding: 12px 16px 12px 42px;
            font-size: 0.9rem;
            font-family: var(--font-sans);
            color: var(--text-main);
            background: white;
            border: 1.5px solid var(--border-color);
            border-radius: 12px;
            outline: none;
            box-shadow: var(--shadow-soft);
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .faq-search-input::placeholder { color: #94a3b8; }

        .faq-search-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79,70,229,0.12);
        }

        .faq-search-clear {
            display: none;
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: #e2e8f0;
            border: none;
            cursor: pointer;
            font-size: 0.65rem;
            color: #64748b;
            align-items: center;
            justify-content: center;
            transition: background 0.15s;
        }

        .faq-search-clear:hover { background: #cbd5e1; }
        .faq-search-clear.visible { display: flex; }

        /* Stats bar */
        .faq-stats {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 24px;
            padding: 10px 0 2px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .faq-stat {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .faq-stat strong {
            color: var(--primary);
            font-weight: 600;
        }

        /* Body */
        .faq-page-body {
            padding: 36px 0 80px;
        }

        /* Category filter */
        .faq-categories {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .faq-cat-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-muted);
            background: var(--bg-surface);
            border: 1.5px solid var(--border-color);
            border-radius: 999px;
            cursor: pointer;
            font-family: var(--font-sans);
            transition: all 0.18s;
            white-space: nowrap;
        }

        .faq-cat-btn .cat-count {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 18px;
            height: 18px;
            padding: 0 5px;
            border-radius: 99px;
            font-size: 0.65rem;
            font-weight: 600;
            background: var(--bg-neutral);
            color: var(--text-muted);
            transition: background 0.18s, color 0.18s;
        }

        .faq-cat-btn:hover {
            color: var(--primary);
            border-color: #c7d2fe;
            background: var(--primary-light);
        }

        .faq-cat-btn.is-active {
            color: white;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 2px 8px rgba(79,70,229,0.28);
        }

        .faq-cat-btn.is-active .cat-count {
            background: rgba(255,255,255,0.25);
            color: white;
        }

        /* Two-column layout */
        .faq-layout {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 36px;
            align-items: start;
        }

        /* Left category list (sticky, desktop) */
        .faq-sidebar {
            position: sticky;
            top: 92px;
        }

        .faq-sidebar-title {
            font-size: 0.68rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: #94a3b8;
            margin-bottom: 10px;
            padding-left: 10px;
        }

        .faq-sidebar-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .faq-sidebar-item button {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            width: 100%;
            padding: 8px 10px;
            font-size: 0.825rem;
            font-weight: 500;
            color: #64748b;
            text-align: left;
            background: none;
            border: none;
            border-radius: 8px;
            border-left: 2px solid transparent;
            cursor: pointer;
            font-family: var(--font-sans);
            transition: color 0.2s, background 0.2s, border-color 0.2s;
        }

        .faq-sidebar-item button .side-left {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .faq-sidebar-item button i {
            width: 14px;
            font-size: 0.72rem;
            color: #94a3b8;
            flex-shrink: 0;
            transition: color 0.2s;
        }

        .faq-sidebar-item button .side-count {
            font-size: 0.7rem;
            font-weight: 600;
            color: #94a3b8;
            background: var(--bg-neutral);
            padding: 1px 7px;
            border-radius: 99px;
            transition: background 0.18s, color 0.18s;
        }

        .faq-sidebar-item button:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .faq-sidebar-item button:hover i { color: var(--primary); }

        .faq-sidebar-item.is-active button {
            color: var(--primary);
            background: var(--primary-light);
            border-left-color: var(--primary);
            font-weight: 600;
        }

        .faq-sidebar-item.is-active button i { color: var(--primary); }

        .faq-sidebar-item.is-active button .side-count {
            background: #c7d2fe;
            color: var(--primary);
        }

        /* FAQ question list */
        .faq-content { min-width: 0; }

        .faq-section-group {
            margin-bottom: 40px;
        }

        .faq-section-group[data-cat].hidden { display: none; }

        .faq-group-header {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-color);
        }

        .faq-group-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.82rem;
            flex-shrink: 0;
        }

        .faq-group-icon.cat-install  { background: #ede9fe; color: #7c3aed; }
        .faq-group-icon.cat-sub      { background: #dbeafe; color: #1d4ed8; }
        .faq-group-icon.cat-connect  { background: #dcfce7; color: #15803d; }
        .faq-group-icon.cat-rules    { background: #fef9c3; color: #a16207; }
        .faq-group-icon.cat-platform { background: #ffe4e6; color: #be123c; }
        .faq-group-icon.cat-privacy  { background: #f0fdf4; color: #166534; }

        .faq-group-header h2 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            letter-spacing: -0.01em;
        }

        .faq-group-header .faq-group-count {
            font-size: 0.72rem;
            color: var(--text-muted);
            font-weight: 500;
            margin-left: auto;
        }

        /* FAQ accordion items */
        .faq-items {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .faq-item:hover { border-color: #c7d2fe; }

        .faq-item.hidden { display: none; }

        .faq-item.search-highlight { border-color: #818cf8; }

        .faq-q-btn {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            width: 100%;
            padding: 15px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-main);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            font-family: var(--font-sans);
            line-height: 1.5;
        }

        .faq-q-btn .faq-q-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 6px;
            background: var(--bg-neutral);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.65rem;
            color: var(--text-muted);
            transition: background 0.2s, color 0.2s, transform 0.25s;
        }

        .faq-item.is-open .faq-q-btn .faq-q-icon {
            background: var(--primary-light);
            color: var(--primary);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-answer-body {
            padding: 0 18px 16px;
            font-size: 0.875rem;
            line-height: 1.8;
            color: #475569;
        }

        .faq-answer-body code {
            font-family: var(--font-mono);
            font-size: 0.82em;
            padding: 2px 6px;
            background: var(--bg-neutral);
            border-radius: 4px;
            color: var(--primary);
        }

        .faq-answer-body a { color: var(--primary); text-decoration: none; }
        .faq-answer-body a:hover { text-decoration: underline; }

        .faq-answer-body ul {
            margin: 8px 0 4px 16px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .faq-answer-body .answer-tip {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            margin-top: 10px;
            padding: 10px 14px;
            background: #fefce8;
            border: 1px solid #fef08a;
            border-radius: 8px;
            font-size: 0.8rem;
            color: #713f12;
        }

        .faq-answer-body .answer-tip i { color: #ca8a04; flex-shrink: 0; margin-top: 1px; }

        .faq-answer-body .answer-warn {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            margin-top: 10px;
            padding: 10px 14px;
            background: #fff1f2;
            border: 1px solid #fecdd3;
            border-radius: 8px;
            font-size: 0.8rem;
            color: #881337;
        }

        .faq-answer-body .answer-warn i { color: #e11d48; flex-shrink: 0; margin-top: 1px; }

        /* No results */
        .faq-no-results {
            display: none;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            padding: 60px 20px;
            text-align: center;
            color: var(--text-muted);
        }

        .faq-no-results.visible { display: flex; }
        .faq-no-results i { font-size: 2.5rem; opacity: 0.25; }
        .faq-no-results p { font-size: 0.9rem; }
        .faq-no-results a { color: var(--primary); text-decoration: none; }

        /* Bottom CTA */
        .faq-bottom-cta {
            margin-top: 48px;
            padding: 28px 32px;
            background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .faq-bottom-cta h3 {
            font-size: 1rem;
            font-weight: 600;
            color: white;
            margin-bottom: 4px;
        }

        .faq-bottom-cta p {
            font-size: 0.82rem;
            color: rgba(255,255,255,0.75);
        }

        .faq-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            background: white;
            border-radius: 10px;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .faq-cta-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(0,0,0,0.18);
        }

        /* ── Responsive ── */
        @media (max-width: 860px) {
            .faq-layout { grid-template-columns: 1fr; }
            .faq-sidebar { display: none; }

            .faq-bottom-cta {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                padding: 24px 20px;
            }
        }

        @media (max-width: 560px) {
            .faq-page-hero { padding: 36px 0 28px; }
            .faq-page-hero h1 { font-size: 1.65rem; }
            .faq-page-hero > .container > p { font-size: 0.85rem; }

            /* Category tabs: horizontal scroll on mobile */
            .faq-categories {
                flex-wrap: nowrap;
                overflow-x: auto;
                gap: 6px;
                padding-bottom: 4px;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
            }
            .faq-categories::-webkit-scrollbar { display: none; }
            .faq-cat-btn { flex-shrink: 0; }

            .faq-stats { gap: 12px; }

            .faq-q-btn { font-size: 0.88rem; padding: 14px 14px; }
            .faq-answer-body { font-size: 0.85rem; }

            .faq-search-wrap { max-width: 100%; }
        }

        @media (max-width: 400px) {
            .faq-page-hero h1 { font-size: 1.4rem; }
        }