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

    #yk-portal-v2 .yk-legacy-tool {
        --primary-color: #0ea5e9;
        --primary-dark: #0284c7;
        --secondary-color: #06b6d4;
        --accent-color: #22d3ee;
        --dark-color: #0f172a;
        --dark-secondary: #1e293b;
        --light-color: #f8fafc;
        --text-color: #475569;
        --text-light: #94a3b8;
        --card-bg: #ffffff;
        --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
        --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
        --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    }

    #yk-portal-v2 .yk-legacy-tool {
        font-family: 'Poppins', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
        color: var(--text-color);
        background-color: var(--light-color);
        line-height: 1.6;
    }

    /* Hero Banner */
    #yk-portal-v2 .yk-legacy-tool .hero-banner {
        background: var(--gradient-dark);
        position: relative;
        padding: 140px 0 100px;
        overflow: hidden;
    }

    #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,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2306b6d4' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        opacity: 0.5;
    }



    #yk-portal-v2 .yk-legacy-tool .hero-content {
        position: relative;
        z-index: 2;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(6, 182, 212, 0.15);
        border: 1px solid rgba(6, 182, 212, 0.3);
        color: var(--accent-color);
        padding: 8px 16px;
        border-radius: 50px;
        font-size: 0.875rem;
        font-weight: 500;
        margin-bottom: 24px;
        backdrop-filter: blur(10px);
    }

    #yk-portal-v2 .yk-legacy-tool .hero-badge i {
        font-size: 1rem;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-title {
        font-size: 3.5rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 20px;
        line-height: 1.2;
        letter-spacing: -0.02em;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-title span {
        background: var(--gradient-primary);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-description {
        font-size: 1.25rem;
        color: var(--text-light);
        max-width: 600px;
        margin-bottom: 32px;
        line-height: 1.8;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-stats {
        display: flex;
        gap: 48px;
        margin-top: 48px;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-stat {
        text-align: left;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-stat-value {
        font-size: 2.5rem;
        font-weight: 700;
        color: #fff;
        line-height: 1;
        margin-bottom: 8px;
    }

    #yk-portal-v2 .yk-legacy-tool .hero-stat-label {
        font-size: 0.875rem;
        color: var(--text-light);
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }


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

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

    #yk-portal-v2 .yk-legacy-tool .section-label {
        display: inline-block;
        background: rgba(14, 165, 233, 0.1);
        color: var(--primary-color);
        padding: 6px 16px;
        border-radius: 50px;
        font-size: 0.875rem;
        font-weight: 600;
        margin-bottom: 16px;
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }

    #yk-portal-v2 .yk-legacy-tool .section-title {
        font-size: 2.5rem;
        font-weight: 700;
        color: var(--dark-color);
        margin-bottom: 16px;
    }

    #yk-portal-v2 .yk-legacy-tool .section-subtitle {
        font-size: 1.125rem;
        color: var(--text-color);
        max-width: 600px;
        margin: 0 auto;
    }

    /* Screenshot Section */
    #yk-portal-v2 .yk-legacy-tool .screenshot-section {
        background: linear-gradient(180deg, var(--light-color) 0%, #e0f2fe 100%);
        padding: 80px 0;
    }

    #yk-portal-v2 .yk-legacy-tool .screenshot-wrapper {
        position: relative;
        max-width: 900px;
        margin: 0 auto;
    }

    #yk-portal-v2 .yk-legacy-tool .screenshot-frame {
        background: var(--dark-color);
        border-radius: 16px;
        padding: 12px;
        box-shadow: var(--shadow-xl), 0 0 60px rgba(14, 165, 233, 0.15);
    }

    #yk-portal-v2 .yk-legacy-tool .screenshot-header {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 12px;
        background: var(--dark-secondary);
        border-radius: 8px 8px 0 0;
        margin-bottom: 4px;
    }

    #yk-portal-v2 .yk-legacy-tool .screenshot-dot {
        width: 12px;
        height: 12px;
        border-radius: 50%;
    }

    #yk-portal-v2 .yk-legacy-tool .screenshot-dot.red { background: #ef4444; }
    #yk-portal-v2 .yk-legacy-tool .screenshot-dot.yellow { background: #eab308; }
    #yk-portal-v2 .yk-legacy-tool .screenshot-dot.green { background: #22c55e; }

    #yk-portal-v2 .yk-legacy-tool .screenshot-title {
        flex: 1;
        text-align: center;
        color: var(--text-light);
        font-size: 0.875rem;
    }

    #yk-portal-v2 .yk-legacy-tool .screenshot-img {
        width: 100%;
        border-radius: 0 0 8px 8px;
        display: block;
    }

    #yk-portal-v2 .yk-legacy-tool .screenshot-glow {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 80%;
        height: 80%;
        background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.2) 0%, transparent 70%);
        filter: blur(40px);
        z-index: -1;
    }

    /* Pain Points */
    #yk-portal-v2 .yk-legacy-tool .pain-section {
        background: #fff;
    }

    #yk-portal-v2 .yk-legacy-tool .pain-card {
        background: linear-gradient(135deg, #fef3c7 0%, #fef9c3 100%);
        border-left: 4px solid #f59e0b;
        border-radius: 12px;
        padding: 24px 28px;
        margin-bottom: 20px;
        transition: all 0.3s ease;
    }

    #yk-portal-v2 .yk-legacy-tool .pain-card:hover {
        transform: translateX(8px);
        box-shadow: var(--shadow-md);
    }

    #yk-portal-v2 .yk-legacy-tool .pain-card i {
        color: #f59e0b;
        margin-right: 12px;
    }

    #yk-portal-v2 .yk-legacy-tool .pain-card p {
        margin: 0;
        font-size: 1.05rem;
        color: #78350f;
    }

    #yk-portal-v2 .yk-legacy-tool .pain-card strong {
        color: #92400e;
    }

    /* Feature Cards */
    #yk-portal-v2 .yk-legacy-tool .feature-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    @media (max-width: 991px) {
        #yk-portal-v2 .yk-legacy-tool .feature-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    @media (max-width: 767px) {
        #yk-portal-v2 .yk-legacy-tool .feature-grid {
            grid-template-columns: 1fr;
        }
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card {
        background: #fff;
        border-radius: 16px;
        padding: 32px;
        box-shadow: var(--shadow-md);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border: 1px solid #e2e8f0;
        position: relative;
        overflow: hidden;
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: var(--gradient-primary);
        transform: scaleX(0);
        transition: transform 0.4s ease;
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-xl);
        border-color: var(--primary-color);
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card:hover::before {
        transform: scaleX(1);
    }

    #yk-portal-v2 .yk-legacy-tool .feature-icon {
        width: 64px;
        height: 64px;
        background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 20px;
        transition: all 0.3s ease;
    }

    #yk-portal-v2 .yk-legacy-tool .feature-icon i {
        font-size: 1.75rem;
        background: var(--gradient-primary);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card:hover .feature-icon {
        background: var(--gradient-primary);
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card:hover .feature-icon i {
        -webkit-text-fill-color: #fff;
        color: #fff;
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card h3 {
        font-size: 1.25rem;
        font-weight: 600;
        color: var(--dark-color);
        margin-bottom: 12px;
    }

    #yk-portal-v2 .yk-legacy-tool .feature-card p {
        color: var(--text-color);
        font-size: 0.95rem;
        line-height: 1.7;
        margin: 0;
    }


    /* Scenarios Section */
    #yk-portal-v2 .yk-legacy-tool .scenarios-section {
        background: linear-gradient(180deg, #f0f9ff 0%, #fff 100%);
    }

    #yk-portal-v2 .yk-legacy-tool .scenario-card {
        display: flex;
        align-items: flex-start;
        gap: 20px;
        background: #fff;
        border-radius: 16px;
        padding: 28px;
        margin-bottom: 20px;
        box-shadow: var(--shadow-sm);
        border: 1px solid #e2e8f0;
        transition: all 0.3s ease;
    }

    #yk-portal-v2 .yk-legacy-tool .scenario-card:hover {
        box-shadow: var(--shadow-lg);
        border-color: var(--primary-color);
    }

    #yk-portal-v2 .yk-legacy-tool .scenario-icon {
        width: 56px;
        height: 56px;
        min-width: 56px;
        background: var(--gradient-primary);
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.5rem;
    }

    #yk-portal-v2 .yk-legacy-tool .scenario-content h4 {
        font-size: 1.125rem;
        font-weight: 600;
        color: var(--dark-color);
        margin-bottom: 8px;
    }

    #yk-portal-v2 .yk-legacy-tool .scenario-content p {
        color: var(--text-color);
        margin: 0;
        font-size: 0.95rem;
        line-height: 1.7;
    }

    /* FAQ Section */
    #yk-portal-v2 .yk-legacy-tool .faq-section {
        background: #fff;
    }

    #yk-portal-v2 .yk-legacy-tool .faq-item {
        background: var(--light-color);
        border-radius: 12px;
        margin-bottom: 16px;
        overflow: hidden;
        border: 1px solid #e2e8f0;
        transition: all 0.3s ease;
    }

    #yk-portal-v2 .yk-legacy-tool .faq-item:hover {
        border-color: var(--primary-color);
    }

    #yk-portal-v2 .yk-legacy-tool .faq-question {
        width: 100%;
        padding: 20px 24px;
        background: transparent;
        border: none;
        text-align: left;
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--dark-color);
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: all 0.3s ease;
    }

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

    #yk-portal-v2 .yk-legacy-tool .faq-question i {
        font-size: 1rem;
        color: var(--primary-color);
        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 {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    #yk-portal-v2 .yk-legacy-tool .faq-answer-inner {
        padding: 0 24px 20px;
        color: var(--text-color);
        line-height: 1.8;
    }

    #yk-portal-v2 .yk-legacy-tool .faq-answer-inner code {
        background: rgba(14, 165, 233, 0.1);
        color: var(--primary-color);
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 0.9em;
    }

    /* Download Section */
    #yk-portal-v2 .yk-legacy-tool .download-section {
        background: var(--gradient-dark);
        position: relative;
        overflow: hidden;
    }

    #yk-portal-v2 .yk-legacy-tool .download-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%2306b6d4' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    }

    #yk-portal-v2 .yk-legacy-tool .download-content {
        position: relative;
        z-index: 2;
        text-align: center;
    }

    #yk-portal-v2 .yk-legacy-tool .download-title {
        font-size: 2.5rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
    }

    #yk-portal-v2 .yk-legacy-tool .download-subtitle {
        font-size: 1.125rem;
        color: var(--text-light);
        margin-bottom: 32px;
    }

    #yk-portal-v2 .yk-legacy-tool .download-btn {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        background: var(--gradient-primary);
        color: #fff;
        padding: 18px 40px;
        border-radius: 12px;
        font-size: 1.125rem;
        font-weight: 600;
        text-decoration: none;
        transition: all 0.3s ease;
        box-shadow: 0 8px 30px rgba(14, 165, 233, 0.4);
    }

    #yk-portal-v2 .yk-legacy-tool .download-btn:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 40px rgba(14, 165, 233, 0.5);
        color: #fff;
    }

    #yk-portal-v2 .yk-legacy-tool .download-btn i {
        font-size: 1.25rem;
    }

    #yk-portal-v2 .yk-legacy-tool .download-info {
        margin-top: 24px;
        display: flex;
        justify-content: center;
        gap: 32px;
        flex-wrap: wrap;
    }

    #yk-portal-v2 .yk-legacy-tool .download-info-item {
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text-light);
        font-size: 0.9rem;
    }

    #yk-portal-v2 .yk-legacy-tool .download-info-item i {
        color: var(--accent-color);
    }

    /* Responsive */
    @media (max-width: 991px) {
        #yk-portal-v2 .yk-legacy-tool .hero-title {
            font-size: 2.5rem;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-stats {
            gap: 32px;
        }
        #yk-portal-v2 .yk-legacy-tool .section-title {
            font-size: 2rem;
        }
    }

    @media (max-width: 767px) {
        #yk-portal-v2 .yk-legacy-tool .hero-banner {
            padding: 120px 0 80px;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-title {
            font-size: 2rem;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-description {
            font-size: 1rem;
        }
        #yk-portal-v2 .yk-legacy-tool .hero-stats {
            flex-direction: column;
            gap: 24px;
        }
        #yk-portal-v2 .yk-legacy-tool .download-title {
            font-size: 1.75rem;
        }
    }