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

        /* 页面专属样式 */
        #yk-portal-v2 .yk-legacy-tool {
            --primary-color: #4f46e5;
            --secondary-color: #3730a3;
            --accent-color: #3B82F6;
            --light-gray-color: #f8f9fa;
            --dark-gray-color: #343a40;
            --nav-bg-color: rgba(13, 25, 49, 0.85);
        }

        #yk-portal-v2 .yk-legacy-tool .navbar {
            background-color: var(--nav-bg-color);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            padding: 10px 0;
            transition: all 0.4s ease;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        #yk-portal-v2 .yk-legacy-tool .navbar-scrolled {
            padding: 8px 0;
            background-color: rgba(13, 25, 49, 0.95);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
        }
        
        #yk-portal-v2 .yk-legacy-tool .navbar-brand img {
            height: 40px;
            transition: all 0.3s ease;
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-scrolled .navbar-brand img {
            height: 36px;
        }

        #yk-portal-v2 .yk-legacy-tool .brand-text {
            color: rgba(255, 255, 255, 0.95); 
            font-weight: 700; 
            font-size: 1.5rem;
            margin-left: 10px;
            transition: all 0.3s ease;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        
        #yk-portal-v2 .yk-legacy-tool .navbar-scrolled .brand-text {
            font-size: 1.3rem;
        }

        #yk-portal-v2 .yk-legacy-tool .nav-link {
            font-weight: 600;
            position: relative;
            padding: 10px 0 !important;
            margin: 0 15px;
            text-transform: uppercase;
            font-size: 14px;
            letter-spacing: 1px;
            transition: all 0.3s ease;
            color: rgba(255, 255, 255, 0.9) !important;
        }
        
        #yk-portal-v2 .yk-legacy-tool .nav-link:before {
            content: "";
            position: absolute;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            bottom: 0;
            left: 50%;
            background-color: var(--accent-color);
            transform: translateX(-50%) scale(0);
            transition: transform 0.3s ease;
        }
        
        #yk-portal-v2 .yk-legacy-tool .nav-link:hover:before,#yk-portal-v2 .yk-legacy-tool 
        .nav-item.active .nav-link:before {
            transform: translateX(-50%) scale(1);
        }
        
        #yk-portal-v2 .yk-legacy-tool .nav-item.active .nav-link {
            color: var(--accent-color) !important;
            text-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
        }
        
        #yk-portal-v2 .yk-legacy-tool .nav-item:hover .nav-link {
            color: #fff !important;
            transform: translateY(-3px);
            text-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
        }

        /* Banner样式 */
        #yk-portal-v2 .yk-legacy-tool .hero-banner {
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            color: white;
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin-top: 60px; /* 为fixed-top navbar留出空间 */
        }

        #yk-portal-v2 .yk-legacy-tool .hero-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 60%);
            animation: yk9e9112c975d3bccf-pulse 8s infinite ease-in-out;
        }

        @keyframes yk9e9112c975d3bccf-pulse {
            0%, 100% { transform: scale(1); opacity: 0.1; }
            50% { transform: scale(1.1); opacity: 0.15; }
        }

        #yk-portal-v2 .yk-legacy-tool .hero-banner .display-4 {
            font-weight: 700;
            text-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        #yk-portal-v2 .yk-legacy-tool .hero-banner .lead {
            font-size: 1.5rem;
            font-weight: 300;
            max-width: 800px;
            margin: 20px auto 0;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        
        #yk-portal-v2 .yk-legacy-tool > .navbar {
            background-color: rgba(13, 25, 49, 0.85);
        }

        /* 通用区块样式 */
        #yk-portal-v2 .yk-legacy-tool .section {
            padding: 80px 0;
        }
        #yk-portal-v2 .yk-legacy-tool .section-title {
            text-align: center;
            margin-bottom: 60px;
            font-weight: 700;
            color: var(--dark-gray-color);
            position: relative;
        }
        #yk-portal-v2 .yk-legacy-tool .section-title::after {
            content: '';
            width: 80px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
        }

        /* 功能介绍卡片 */
        #yk-portal-v2 .yk-legacy-tool .feature-card {
            background: #fff;
            border-radius: 15px;
            padding: 40px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            height: 100%;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(79, 70, 229, 0.15);
        }

        #yk-portal-v2 .yk-legacy-tool .feature-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            display: inline-block;
            line-height: 1;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-card h5 {
            font-weight: 600;
            margin-bottom: 15px;
            color: var(--dark-gray-color);
        }

        /* FAQ样式 */
        #yk-portal-v2 .yk-legacy-tool .faq-item {
            background-color: #ffffff;
            margin-bottom: 15px;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            overflow: hidden;
            border: 1px solid #eee;
        }
        #yk-portal-v2 .yk-legacy-tool .faq-question {
            padding: 20px 30px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--dark-gray-color);
        }
        #yk-portal-v2 .yk-legacy-tool .faq-question::after {
            content: '\f078'; /* Font Awesome Angle Down */
            font-family: 'Font Awesome 5 Free';
            font-weight: 900;
            transition: transform 0.3s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .faq-answer {
            padding: 0 30px 20px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.4s ease-in-out;
            color: #6c757d;
        }
        #yk-portal-v2 .yk-legacy-tool .faq-item.active .faq-answer {
            max-height: 300px; /* Adjust as needed */
        }
        #yk-portal-v2 .yk-legacy-tool .faq-item.active .faq-question::after {
            transform: rotate(180deg);
        }
        
        /* 下载按钮 */
        #yk-portal-v2 .yk-legacy-tool .download-btn {
            font-size: 1.2rem;
            padding: 15px 40px;
            border-radius: 50px;
            font-weight: 600;
            background: linear-gradient(90deg, #2563EB, #3B82F6);
            border: none;
            box-shadow: 0 5px 20px rgba(59, 130, 246, 0.4);
            transition: all 0.3s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6);
        }
        
        #yk-portal-v2 .yk-legacy-tool .bg-light {
            background-color: var(--light-gray-color) !important;
        }