.blz-tutorials-panel { background: transparent; padding: 0; color: #e2e8f0; min-height: 400px; }
        .blz-tutorials-panel h2 {
            color: #fff; font-size: 24px; font-weight: 700; margin: 0 0 8px 0;
            display: flex; align-items: center; gap: 12px;
            background: linear-gradient(90deg, #22d3ee, #a855f7, #22d3ee);
            background-size: 200% auto;
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
            animation: gradientShift 4s ease infinite;
        }
        @keyframes gradientShift { 0%,100% { background-position: 0% center; } 50% { background-position: 100% center; } }
        .blz-tutorials-panel h3 { color: #fff; font-size: 18px; font-weight: 600; margin: 35px 0 20px 0; display: flex; align-items: center; gap: 10px; }
        .tutorials-subtitle { color: #64748b; margin-bottom: 25px; font-size: 13px; line-height: 1.5; }
        .no-tutorials { text-align: center; padding: 80px 20px; color: #475569; background: rgba(15, 23, 42, 0.4); border-radius: 16px; border: 1px dashed rgba(71, 85, 105, 0.3); }
        .tutorials-header-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 8px; flex-wrap: wrap; }
        .tutorials-header-row h2 { margin: 0 !important; }
        .btn-activate-key-open {
            display: inline-flex; align-items: center; gap: 10px; padding: 12px 22px;
            background: linear-gradient(135deg, rgba(168, 85, 247, 0.15) 0%, rgba(34, 211, 238, 0.15) 100%);
            border: 1px solid rgba(168, 85, 247, 0.3); border-radius: 12px;
            color: #e2e8f0; font-size: 14px; font-weight: 600; cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); position: relative; overflow: hidden;
        }
        .btn-activate-key-open::before {
            content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(168, 85, 247, 0.2), transparent);
            transition: left 0.5s ease;
        }
        .btn-activate-key-open:hover {
            border-color: rgba(168, 85, 247, 0.6);
            background: linear-gradient(135deg, rgba(168, 85, 247, 0.25) 0%, rgba(34, 211, 238, 0.25) 100%);
            transform: translateY(-2px); box-shadow: 0 8px 25px rgba(168, 85, 247, 0.25);
        }
        .btn-activate-key-open:hover::before { left: 100%; }
        .btn-key-icon { font-size: 18px; animation: keyShake 2s ease-in-out infinite; }
        @keyframes keyShake { 0%,100% { transform: rotate(0deg); } 25% { transform: rotate(-10deg); } 50% { transform: rotate(10deg); } 75% { transform: rotate(-5deg); } }
        .key-modal-overlay {
            position: fixed; top: 0 !important; left: 0 !important; right: 0 !important; bottom: 0 !important;
            width: 100% !important; height: 100% !important;
            background: rgba(2, 6, 23, 0.85); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
            display: flex; align-items: center; justify-content: center; z-index: 999999 !important;
            opacity: 0; visibility: hidden; transition: all 0.3s ease;
            margin: 0 !important; padding: 0 !important;
        }
        .key-modal-overlay.active { opacity: 1; visibility: visible; }
        .key-modal-container {
            position: fixed !important; top: 50% !important; left: 50% !important;
            transform: translate(-50%, -50%) scale(0.95);
            background: rgba(15, 23, 42, 0.98); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(168, 85, 247, 0.3); border-radius: 20px; padding: 32px;
            width: 90%; max-width: 480px;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5), 0 0 60px rgba(168, 85, 247, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.05);
            margin: 0 !important;
        }
        .key-modal-overlay.active .key-modal-container { transform: translate(-50%, -50%) scale(1); }
        .key-modal-container::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
            background: linear-gradient(90deg, #a855f7, #22d3ee, #a855f7);
            background-size: 200% auto; border-radius: 20px 20px 0 0;
            animation: gradientShift 3s ease infinite;
        }
        .key-modal-close {
            position: absolute; top: 16px; right: 16px; width: 36px; height: 36px;
            display: flex; align-items: center; justify-content: center;
            background: rgba(239, 68, 68, 0.15); border: 1px solid rgba(239, 68, 68, 0.3);
            border-radius: 10px; color: #f87171; font-size: 24px;
            cursor: pointer; transition: all 0.3s ease; line-height: 1;
        }
        .key-modal-close:hover { background: rgba(239, 68, 68, 0.3); border-color: rgba(239, 68, 68, 0.6); transform: rotate(90deg); }
        .key-modal-header { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
        .key-modal-title-group { display: flex; flex-direction: column; gap: 4px; }
        .key-notice {
            display: flex; align-items: flex-start; gap: 12px;
            background: rgba(251, 191, 36, 0.1); border: 1px solid rgba(251, 191, 36, 0.3);
            border-radius: 12px; padding: 14px 16px; margin-bottom: 20px;
        }
        .notice-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
        .notice-text { font-size: 13px; color: #fbbf24; line-height: 1.5; }
        .notice-text strong { color: #fcd34d; }
        .key-icon {
            width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(168, 85, 247, 0.2));
            border-radius: 10px; font-size: 20px;
        }
        .key-title { font-size: 16px; font-weight: 600; color: #e2e8f0; }
        .activate-key-form { display: flex; gap: 12px; margin-bottom: 12px; }
        .activate-key-form input {
            flex: 1; padding: 14px 18px;
            background: rgba(2, 6, 23, 0.8); border: 1px solid rgba(71, 85, 105, 0.3); border-radius: 10px;
            color: #fff; font-size: 14px;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            text-transform: uppercase; letter-spacing: 2px;
            outline: none; transition: all 0.3s ease;
        }
        .activate-key-form input:focus { border-color: #22d3ee; box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1); }
        .activate-key-form input::placeholder { color: #475569; text-transform: none; letter-spacing: normal; font-family: inherit; }
        .activate-key-form button {
            padding: 14px 28px;
            background: linear-gradient(135deg, #22d3ee 0%, #06b6d4 100%);
            border: none; border-radius: 10px;
            color: #0a0e1a; font-size: 14px; font-weight: 700;
            cursor: pointer; transition: all 0.3s ease; white-space: nowrap;
            position: relative; overflow: hidden;
        }
        .activate-key-form button::before {
            content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s ease;
        }
        .activate-key-form button:hover::before { left: 100%; }
        .activate-key-form button:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(34, 211, 238, 0.35); }
        .activate-key-form button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
        .key-feedback { padding: 14px 18px; border-radius: 10px; font-size: 14px; margin-bottom: 12px; font-weight: 500; }
        .key-feedback.success { background: rgba(34, 197, 94, 0.15); border: 1px solid rgba(34, 197, 94, 0.3); color: #4ade80; }
        .key-feedback.error { background: rgba(239, 68, 68, 0.15); border: 1px solid rgba(239, 68, 68, 0.3); color: #f87171; }
        .key-hint { font-size: 12px; color: #475569; margin: 16px 0 0 0; text-align: center; }
        .tutorials-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
        .tutorial-category-card {
            background: rgba(15, 23, 42, 0.5); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
            border: 1px solid rgba(71, 85, 105, 0.2); border-radius: 14px;
            overflow: hidden; transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); position: relative;
        }
        .tutorial-category-card::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(135deg, rgba(168, 85, 247, 0.05) 0%, rgba(34, 211, 238, 0.05) 100%);
            opacity: 0; transition: opacity 0.4s ease; pointer-events: none;
        }
        .tutorial-category-card:hover { border-color: rgba(168, 85, 247, 0.4); box-shadow: 0 12px 40px rgba(168, 85, 247, 0.15); transform: translateY(-4px); }
        .tutorial-category-card:hover::before { opacity: 1; }
        .category-header { display: flex; align-items: center; gap: 14px; padding: 18px 20px; background: transparent; cursor: pointer; position: relative; z-index: 1; }
        .category-icon {
            width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(139, 92, 246, 0.1));
            border-radius: 12px; font-size: 22px; border: 1px solid rgba(168, 85, 247, 0.2);
        }
        .category-name { flex: 1; font-size: 15px; font-weight: 600; color: #f1f5f9; letter-spacing: 0.3px; }
        .product-count {
            background: linear-gradient(135deg, #a855f7 0%, #8b5cf6 100%);
            color: #fff; padding: 6px 14px; border-radius: 20px;
            font-size: 12px; font-weight: 700; min-width: 32px; text-align: center;
            box-shadow: 0 4px 15px rgba(168, 85, 247, 0.3);
        }
        .category-products-dropdown {
            max-height: 0; overflow: hidden;
            transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            background: rgba(2, 6, 23, 0.5);
            border-top: 1px solid rgba(71, 85, 105, 0.15);
        }
        .tutorial-category-card:hover .category-products-dropdown { max-height: 400px; }
        .product-item { display: flex; align-items: center; gap: 14px; padding: 14px 20px; transition: all 0.2s ease; border-bottom: 1px solid rgba(71, 85, 105, 0.1); }
        .product-item:last-child { border-bottom: none; }
        .product-item:hover { background: rgba(168, 85, 247, 0.08); }
        .product-item.locked { opacity: 0.5; }
        .product-item.locked:hover { opacity: 0.65; }
        .product-image { width: 48px; height: 48px; border-radius: 10px; overflow: hidden; flex-shrink: 0; border: 2px solid rgba(71, 85, 105, 0.2); }
        .product-image img { width: 100%; height: 100%; object-fit: cover; }
        .product-info { flex: 1; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
        .product-name { font-size: 14px; font-weight: 600; color: #e2e8f0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .topic-count { font-size: 12px; color: #64748b; display: flex; align-items: center; gap: 4px; }
        .topic-count::before { content: '📄'; font-size: 10px; }
        .product-action { flex-shrink: 0; }
        .btn-view-tutorial {
            display: inline-flex; align-items: center; gap: 6px; padding: 8px 18px;
            background: linear-gradient(135deg, #a855f7 0%, #7c3aed 100%);
            color: #ffffff; font-size: 12px; font-weight: 700;
            border-radius: 8px; text-decoration: none; transition: all 0.3s ease;
            text-transform: uppercase; letter-spacing: 0.5px;
        }
        .btn-view-tutorial:hover { transform: scale(1.05); box-shadow: 0 6px 20px rgba(168, 85, 247, 0.4); color: #ffffff; }
        .lock-icon { font-size: 20px; opacity: 0.4; }
        .quick-access-section { margin-top: 40px; padding-top: 32px; border-top: 1px solid rgba(71, 85, 105, 0.2); }
        .quick-access-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
        .quick-access-card {
            display: flex; align-items: center; gap: 14px; padding: 14px 18px;
            background: rgba(34, 211, 238, 0.05); border: 1px solid rgba(34, 211, 238, 0.15);
            border-radius: 12px; text-decoration: none;
            transition: all 0.3s ease; position: relative; overflow: hidden;
        }
        .quick-access-card::before {
            content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 100%;
            background: linear-gradient(180deg, #22d3ee, #06b6d4);
            opacity: 0; transition: opacity 0.3s ease;
        }
        .quick-access-card:hover { border-color: rgba(34, 211, 238, 0.4); box-shadow: 0 8px 30px rgba(34, 211, 238, 0.15); transform: translateX(4px); background: rgba(34, 211, 238, 0.08); }
        .quick-access-card:hover::before { opacity: 1; }
        .qa-image { width: 44px; height: 44px; border-radius: 10px; overflow: hidden; flex-shrink: 0; border: 2px solid rgba(34, 211, 238, 0.2); }
        .qa-image img { width: 100%; height: 100%; object-fit: cover; }
        .qa-info { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
        .qa-name { font-size: 14px; font-weight: 600; color: #f1f5f9; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .qa-topics { font-size: 12px; color: #22d3ee; font-weight: 500; }
        @media (max-width: 900px) { .tutorials-grid { grid-template-columns: 1fr; } }
        @media (max-width: 768px) {
            .blz-tutorials-panel { padding: 0; }
            .blz-tutorials-panel h2 { font-size: 20px; }
            .tutorials-header-row { flex-direction: column; align-items: flex-start; gap: 16px; }
            .btn-activate-key-open { width: 100%; justify-content: center; padding: 14px 20px; }
            .key-modal-container { padding: 24px; width: calc(100% - 32px); max-width: calc(100% - 32px); }
            .key-modal-header { flex-direction: column; text-align: center; }
            .key-modal-title-group { align-items: center; }
            .key-notice { flex-direction: column; text-align: center; gap: 8px; }
            .activate-key-form { flex-direction: column; }
            .activate-key-form input, .activate-key-form button { width: 100%; }
            .category-header { padding: 16px; }
            .category-icon { width: 38px; height: 38px; font-size: 18px; }
            .quick-access-grid { grid-template-columns: 1fr; }
            .category-products-dropdown { max-height: none; }
        }
        .blz-tutorials-panel :focus-visible, .key-modal-overlay :focus-visible { outline: 3px solid #22d3ee; outline-offset: 3px; }
        @media (prefers-reduced-motion: reduce) {
            .blz-tutorials-panel *, .key-modal-overlay * { animation: none !important; transition-duration: .01ms !important; }
        }