/* Original tool presentation, scoped to this detail page. */

        #yk-portal-v2 .yk-legacy-tool {
            font-family: 'Nunito', 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #f8f9fa;
            color: #343a40;
            line-height: 1.6;
        }

        #yk-portal-v2 .yk-legacy-tool {
            --primary-color: #2563EB;
            --secondary-color: #1E40AF;
            --accent-color: #3B82F6;
            --text-dark: #212529;
            --text-light: #f8f9fa;
            --text-muted: #6c757d;
            --section-bg-light: #ffffff;
            --section-bg-darker: #eef2f7;
            --border-color: #dee2e6;
        }

        /* Hero Banner Section */
        #yk-portal-v2 .yk-legacy-tool .hero-banner {
            padding: 120px 0 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
            margin-top: 60px;
        }

        #yk-portal-v2 .yk-legacy-tool .hero-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.05)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,165.3C1248,171,1344,149,1392,138.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
            background-size: cover;
            opacity: 0.3;
        }

        #yk-portal-v2 .yk-legacy-tool .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        #yk-portal-v2 .yk-legacy-tool .hero-banner .hero-content { align-items: center !important; text-align: center !important; }

        #yk-portal-v2 .yk-legacy-tool .hero-banner h1 {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
            text-align: center;
            width: 100%;
        }

        #yk-portal-v2 .yk-legacy-tool .hero-banner .subtitle {
            font-size: 1.3rem;
            opacity: 0.95;
            max-width: 750px;
            margin: 0 auto;
            font-weight: 300;
        }

        #yk-portal-v2 .yk-legacy-tool .tool-screenshot {
            margin-top: 30px;
            border-radius: 12px;
            box-shadow: 0 10px 35px rgba(0,0,0,0.35);
            border: 1px solid rgba(255,255,255,0.12);
            max-width: 960px;
            width: 100%;
        }

        /* Section Styles */
        #yk-portal-v2 .yk-legacy-tool .section-padding {
            padding: 80px 0;
        }

        #yk-portal-v2 .yk-legacy-tool .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        #yk-portal-v2 .yk-legacy-tool .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }

        #yk-portal-v2 .yk-legacy-tool .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
            border-radius: 2px;
        }

        #yk-portal-v2 .yk-legacy-tool .section-title p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 20px auto 0;
        }

        /* Pain Points Section */
        #yk-portal-v2 .yk-legacy-tool .pain-points {
            background: var(--section-bg-light);
        }

        #yk-portal-v2 .yk-legacy-tool .pain-point-card {
            background: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            margin-bottom: 20px;
            transition: all 0.3s ease;
            border-left: 4px solid #dc3545;
        }

        #yk-portal-v2 .yk-legacy-tool .pain-point-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.12);
        }

        #yk-portal-v2 .yk-legacy-tool .pain-point-card .icon {
            font-size: 2.5rem;
            color: #dc3545;
            margin-bottom: 15px;
        }

        #yk-portal-v2 .yk-legacy-tool .pain-point-card h4 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        #yk-portal-v2 .yk-legacy-tool .pain-point-card p {
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* Features Section */
        #yk-portal-v2 .yk-legacy-tool .features-section {
            background: var(--section-bg-darker);
        }

        #yk-portal-v2 .yk-legacy-tool .feature-card {
            background: #fff;
            padding: 35px 25px;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            margin-bottom: 30px;
            transition: all 0.3s ease;
            text-align: center;
            height: 100%;
        }
        
        #yk-portal-v2 .yk-legacy-tool .features-section .row {
            row-gap: 20px;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 40px rgba(37,99,235,0.15);
        }

        #yk-portal-v2 .yk-legacy-tool .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: white;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-card h4 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 15px;
            color: var(--text-dark);
        }

        #yk-portal-v2 .yk-legacy-tool .feature-card p {
            color: var(--text-muted);
            margin-bottom: 10px;
            line-height: 1.7;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-benefit {
            background: #e6f4ff;
            padding: 10px 15px;
            border-radius: 6px;
            margin-top: 15px;
            font-size: 0.95rem;
            color: var(--primary-color);
            font-weight: 600;
        }

        /* Application Scenarios */
        #yk-portal-v2 .yk-legacy-tool .scenarios-section {
            background: var(--section-bg-light);
        }

        #yk-portal-v2 .yk-legacy-tool .scenario-card {
            background: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            margin-bottom: 25px;
            transition: all 0.3s ease;
        }

        #yk-portal-v2 .yk-legacy-tool .scenario-card:hover {
            box-shadow: 0 8px 30px rgba(0,0,0,0.12);
        }

        #yk-portal-v2 .yk-legacy-tool .scenario-header {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }

        #yk-portal-v2 .yk-legacy-tool .scenario-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #667eea, #764ba2);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            font-size: 1.5rem;
            color: white;
        }

        #yk-portal-v2 .yk-legacy-tool .scenario-card h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 0;
            color: var(--text-dark);
        }

        #yk-portal-v2 .yk-legacy-tool .scenario-card .use-case {
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* Usage Steps Section */
        #yk-portal-v2 .yk-legacy-tool .usage-section {
            background: var(--section-bg-darker);
        }

        #yk-portal-v2 .yk-legacy-tool .step-card {
            background: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            margin-bottom: 25px;
            display: flex;
            transition: all 0.3s ease;
        }

        #yk-portal-v2 .yk-legacy-tool .step-card:hover {
            transform: translateX(10px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.12);
        }

        #yk-portal-v2 .yk-legacy-tool .step-number {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            color: white;
            flex-shrink: 0;
            margin-right: 20px;
        }

        #yk-portal-v2 .yk-legacy-tool .step-content h5 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        #yk-portal-v2 .yk-legacy-tool .step-content p {
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* FAQ Section */
        #yk-portal-v2 .yk-legacy-tool .faq-section {
            background: var(--section-bg-light);
        }

        #yk-portal-v2 .yk-legacy-tool .faq-item {
            background: #fff;
            border-radius: 8px;
            margin-bottom: 15px;
            box-shadow: 0 3px 15px rgba(0,0,0,0.06);
            overflow: hidden;
        }

        #yk-portal-v2 .yk-legacy-tool .faq-question {
            padding: 20px 25px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-dark);
            transition: all 0.3s ease;
            font-size: 1.05rem;
        }

        #yk-portal-v2 .yk-legacy-tool .faq-question:hover {
            background: #f8f9fa;
            color: var(--primary-color);
        }

        #yk-portal-v2 .yk-legacy-tool .faq-question.active {
            background: var(--primary-color);
            color: white;
        }

        #yk-portal-v2 .yk-legacy-tool .faq-question i {
            transition: transform 0.3s ease;
        }

        #yk-portal-v2 .yk-legacy-tool .faq-question.active i {
            transform: rotate(180deg);
        }

        #yk-portal-v2 .yk-legacy-tool .faq-answer {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: var(--text-muted);
            line-height: 1.7;
        }

        #yk-portal-v2 .yk-legacy-tool .faq-answer.show {
            padding: 20px 25px;
            max-height: 500px;
        }

        /* Download Section */
        #yk-portal-v2 .yk-legacy-tool .download-section {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            padding: 80px 0;
            color: white;
        }

        #yk-portal-v2 .yk-legacy-tool .download-section h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        #yk-portal-v2 .yk-legacy-tool .download-section p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        #yk-portal-v2 .yk-legacy-tool .download-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 40px;
            background: white;
            color: var(--primary-color);
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 5px 20px rgba(0,0,0,0.2);
        }

        #yk-portal-v2 .yk-legacy-tool .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.3);
            color: var(--primary-color);
            text-decoration: none;
        }

        #yk-portal-v2 .yk-legacy-tool .system-requirements {
            margin-top: 20px;
            font-size: 1rem;
            opacity: 0.9;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            #yk-portal-v2 .yk-legacy-tool .hero-banner {
                padding: 80px 0 60px;
            }

            #yk-portal-v2 .yk-legacy-tool .hero-banner h1 {
                font-size: 2rem;
            }

            #yk-portal-v2 .yk-legacy-tool .hero-banner .subtitle {
                font-size: 1.1rem;
            }

            #yk-portal-v2 .yk-legacy-tool .section-title h2 {
                font-size: 2rem;
            }

            #yk-portal-v2 .yk-legacy-tool .section-padding {
                padding: 60px 0;
            }

            #yk-portal-v2 .yk-legacy-tool .step-card {
                flex-direction: column;
                text-align: center;
            }

            #yk-portal-v2 .yk-legacy-tool .step-number {
                margin: 0 auto 15px;
            }
        }