/* ============================================= */
        /* ===== متغیرهای اختصاصی صفحه کاتالوگ ===== */
        /* ============================================= */
        :root {
            --catlg-primary: #2563eb;
            --catlg-primary-dark: #1d4ed8;
            --catlg-secondary: #f59e0b;
            --catlg-dark: #1e293b;
            --catlg-darker: #0f172a;
            --catlg-text: #334155;
            --catlg-text-light: #64748b;
            --catlg-border: #e2e8f0;
            --catlg-bg-page: #f1f5f9;
            --catlg-bg-card: #ffffff;
            --catlg-radius: 14px;
            --catlg-radius-sm: 10px;
            --catlg-shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
            --catlg-shadow-card-hover: 0 8px 30px rgba(37,99,235,0.12), 0 2px 8px rgba(0,0,0,0.06);
            --catlg-shadow-download: 0 4px 14px rgba(37,99,235,0.3);
            --catlg-transition-fast: 0.2s ease;
            --catlg-transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --catlg-transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --catlg-font: 'Vazirmatn', sans-serif;
        }

        /* ============================================= */
        /* ===== ریست محدود صفحه کاتالوگ ===== */
        /* ============================================= */
        .catlg-page-root *,
        .catlg-page-root *::before,
        .catlg-page-root *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        .catlg-page-root {
            font-family: var(--catlg-font);
            color: var(--catlg-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .catlg-page-root a {
            text-decoration: none;
            color: inherit;
        }

        .catlg-page-root ul {
            list-style: none;
        }

        /* ============================================= */
        /* ===== بنر بالای صفحه ===== */
        /* ============================================= */
        .catlg-top-banner {
            position: relative;
            width: 100%;
            min-height: 280px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--catlg-dark) 0%, var(--catlg-primary-dark) 50%, var(--catlg-primary) 100%);
            overflow: hidden;
        }

        .catlg-top-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse 600px 400px at 20% 50%, rgba(245,158,11,0.12) 0%, transparent 70%),
                radial-gradient(ellipse 500px 350px at 80% 30%, rgba(255,255,255,0.06) 0%, transparent 60%);
            pointer-events: none;
        }

        .catlg-top-banner::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--catlg-bg-page);
            clip-path: ellipse(55% 100% at 50% 100%);
            z-index: 2;
        }

        .catlg-banner-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 60px 20px;
            max-width: 700px;
        }

        .catlg-banner-title {
            font-size: 2.6rem;
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }

        .catlg-banner-subtitle {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.75);
            font-weight: 400;
            line-height: 1.8;
        }

        /* ============================================= */
        /* ===== محتوای اصلی ===== */
        /* ============================================= */
        .catlg-main-content {
            background-color: var(--catlg-bg-page);
            padding: 50px 0 80px;
            min-height: 50vh;
        }

        .catlg-content-wrapper {
            max-width: 960px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ============================================= */
        /* ===== بخش معرفی ===== */
        /* ============================================= */
        .catlg-intro-block {
            text-align: center;
            margin-bottom: 50px;
        }

        .catlg-intro-heading {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--catlg-dark);
            margin-bottom: 12px;
        }

        .catlg-intro-text {
            font-size: 1rem;
            color: var(--catlg-text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.9;
        }

        /* ============================================= */
        /* ===== لیست کاتالوگ‌ها ===== */
        /* ============================================= */
        .catlg-list-container {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        /* --- کارت تک کاتالوگ --- */
        .catlg-single-item {
            background-color: var(--catlg-bg-card);
            border-radius: var(--catlg-radius);
            box-shadow: var(--catlg-shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: row;
            align-items: stretch;
            border: 1px solid var(--catlg-border);
            transition:
                box-shadow var(--catlg-transition-normal),
                transform var(--catlg-transition-normal),
                border-color var(--catlg-transition-fast);
        }

        .catlg-single-item:hover {
            box-shadow: var(--catlg-shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--catlg-primary);
        }

        /* --- نوار کناری رنگی --- */
        .catlg-item-accent-bar {
            width: 6px;
            flex-shrink: 0;
            background: linear-gradient(180deg, var(--catlg-primary) 0%, var(--catlg-secondary) 100%);
            transition: width var(--catlg-transition-normal);
        }

        .catlg-single-item:hover .catlg-item-accent-bar {
            width: 8px;
        }

        /* --- محتوای متنی --- */
        .catlg-item-body {
            flex: 1;
            padding: 28px 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 10px;
            min-width: 0;
        }

        .catlg-item-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--catlg-dark);
            line-height: 1.5;
            transition: color var(--catlg-transition-fast);
        }

        .catlg-single-item:hover .catlg-item-title {
            color: var(--catlg-primary);
        }

        .catlg-item-desc {
            font-size: 0.92rem;
            color: var(--catlg-text-light);
            line-height: 1.8;
        }

        /* --- بخش دکمه دانلود --- */
        .catlg-item-action {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            padding: 20px 28px;
        }

        .catlg-download-anchor {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background-color: var(--catlg-primary);
            color: #ffffff;
            font-family: var(--catlg-font);
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: 50px;
            border: 2px solid var(--catlg-primary);
            white-space: nowrap;
            cursor: pointer;
            transition:
                background-color var(--catlg-transition-fast),
                color var(--catlg-transition-fast),
                box-shadow var(--catlg-transition-normal),
                transform var(--catlg-transition-fast);
        }

        .catlg-download-anchor:hover {
            background-color: var(--catlg-dark);
            border-color: var(--catlg-dark);
            color: #ffffff;
            box-shadow: var(--catlg-shadow-download);
            transform: translateY(-2px);
        }

        .catlg-download-anchor:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37,99,235,0.2);
        }

        .catlg-download-label {
            display: inline;
        }

        /* فلش دانلود - بدون استفاده از فونت‌آیسون */
        .catlg-download-arrow {
            display: inline-block;
            width: 16px;
            height: 16px;
            border-bottom: 2.5px solid currentColor;
            border-inline-end: 2.5px solid currentColor;
            transform: rotate(-45deg);
            transition: transform var(--catlg-transition-fast);
        }

        .catlg-download-anchor:hover .catlg-download-arrow {
            transform: rotate(-45deg) translate(2px, 2px);
        }

        /* ============================================= */
        /* ===== شماره‌گذاری آیتم‌ها ===== */
        /* ============================================= */
        .catlg-item-number {
            position: absolute;
            top: 16px;
            inset-inline-start: 16px;
            font-size: 0.75rem;
            font-weight: 700;
            color: rgba(37,99,235,0.15);
            pointer-events: none;
            user-select: none;
        }

        .catlg-single-item {
            position: relative;
        }

        /* ============================================= */
        /* ===== حالت خالی ===== */
        /* ============================================= */
        .catlg-empty-state {
            text-align: center;
            padding: 80px 20px;
        }

        .catlg-empty-heading {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--catlg-dark);
            margin-bottom: 10px;
        }

        .catlg-empty-text {
            font-size: 1rem;
            color: var(--catlg-text-light);
        }

        /* ============================================= */
        /* ===== انیمیشن ورود ===== */
        /* ============================================= */
        .catlg-single-item {
            opacity: 0;
            transform: translateY(24px);
            animation: catlgFadeSlideUp 0.5s ease forwards;
        }

        .catlg-single-item:nth-child(1) { animation-delay: 0.05s; }
        .catlg-single-item:nth-child(2) { animation-delay: 0.12s; }
        .catlg-single-item:nth-child(3) { animation-delay: 0.19s; }
        .catlg-single-item:nth-child(4) { animation-delay: 0.26s; }
        .catlg-single-item:nth-child(5) { animation-delay: 0.33s; }
        .catlg-single-item:nth-child(6) { animation-delay: 0.40s; }
        .catlg-single-item:nth-child(7) { animation-delay: 0.47s; }
        .catlg-single-item:nth-child(8) { animation-delay: 0.54s; }
        .catlg-single-item:nth-child(9) { animation-delay: 0.61s; }
        .catlg-single-item:nth-child(10) { animation-delay: 0.68s; }

        @keyframes catlgFadeSlideUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ============================================= */
        /* ===== ریسپانسیو - تبلت ===== */
        /* ============================================= */
        @media (max-width: 768px) {
            .catlg-top-banner {
                min-height: 220px;
            }

            .catlg-banner-title {
                font-size: 2rem;
            }

            .catlg-banner-subtitle {
                font-size: 1rem;
            }

            .catlg-main-content {
                padding: 35px 0 60px;
            }

            .catlg-item-body {
                padding: 22px 20px;
            }

            .catlg-item-action {
                padding: 16px 20px;
            }

            .catlg-download-anchor {
                padding: 10px 22px;
                font-size: 0.85rem;
            }

            .catlg-intro-heading {
                font-size: 1.2rem;
            }
        }

        /* ============================================= */
        /* ===== ریسپانسیو - موبایل ===== */
        /* ============================================= */
        @media (max-width: 576px) {
            .catlg-top-banner {
                min-height: 190px;
            }

            .catlg-banner-inner {
                padding: 40px 16px;
            }

            .catlg-banner-title {
                font-size: 1.6rem;
            }

            .catlg-banner-subtitle {
                font-size: 0.9rem;
            }

            .catlg-main-content {
                padding: 28px 0 50px;
            }

            .catlg-content-wrapper {
                padding: 0 14px;
            }

            /* تغییر لایه‌بندی به ستونی */
            .catlg-single-item {
                flex-direction: column;
                gap: 0;
            }

            .catlg-item-accent-bar {
                width: 100%;
                height: 5px;
                background: linear-gradient(90deg, var(--catlg-primary) 0%, var(--catlg-secondary) 100%);
            }

            .catlg-single-item:hover .catlg-item-accent-bar {
                width: 100%;
                height: 6px;
            }

            .catlg-item-body {
                padding: 18px 16px 8px;
                gap: 6px;
            }

            .catlg-item-title {
                font-size: 1.05rem;
            }

            .catlg-item-desc {
                font-size: 0.85rem;
                line-height: 1.7;
            }

            .catlg-item-action {
                padding: 8px 16px 18px;
                justify-content: flex-start;
            }

            .catlg-download-anchor {
                padding: 10px 24px;
                font-size: 0.85rem;
            }

            .catlg-intro-block {
                margin-bottom: 35px;
            }

            .catlg-intro-heading {
                font-size: 1.1rem;
            }

            .catlg-intro-text {
                font-size: 0.9rem;
            }

            .catlg-list-container {
                gap: 16px;
            }

            .catlg-item-number {
                top: 10px;
                inset-inline-start: 12px;
                font-size: 0.65rem;
            }
        }

        /* ============================================= */
        /* ===== ریسپانسیو - موبایل بسیار کوچک ===== */
        /* ============================================= */
        @media (max-width: 380px) {
            .catlg-banner-title {
                font-size: 1.35rem;
            }

            .catlg-item-body {
                padding: 14px 12px 6px;
            }

            .catlg-item-action {
                padding: 6px 12px 14px;
            }

            .catlg-download-anchor {
                padding: 9px 20px;
                font-size: 0.8rem;
            }
        }

        /* ============================================= */
        /* ===== پشتیبانی از حالت LTR ===== */
        /* ============================================= */
        [dir="ltr"] .catlg-download-arrow {
            transform: rotate(45deg);
        }

        [dir="ltr"] .catlg-download-anchor:hover .catlg-download-arrow {
            transform: rotate(45deg) translate(2px, 2px);
        }

        /* ============================================= */
        /* ===== حالت کاهش حرکت ===== */
        /* ============================================= */
        @media (prefers-reduced-motion: reduce) {
            .catlg-single-item {
                opacity: 1;
                transform: none;
                animation: none;
            }

            .catlg-single-item:hover {
                transform: none;
            }

            .catlg-download-anchor:hover {
                transform: none;
            }

            .catlg-item-accent-bar {
                transition: none;
            }

            .catlg-download-arrow {
                transition: none;
            }
        }