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

        #yk-portal-v2 .yk-legacy-tool {
            /* font-family removed as it should be in main CSS or page */
             background-color: #f8f9fa; /* Light background for content area */
        }

        /* 主色调来源于logo，假设是蓝色系 */
        #yk-portal-v2 .yk-legacy-tool {
            --primary-color: #2563EB; /* 主要蓝色 - 根据实际logo颜色调整 */
            --secondary-color: #1E40AF; /* 深蓝色 - 根据实际logo颜色调整 */
            --accent-color: #3B82F6; /* 亮蓝色 - 根据实际logo颜色调整 */
            --nav-bg-color: rgba(13, 25, 49, 0.85); /* 深蓝背景 - 根据实际logo颜色调整 */
        }

        #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 {
            display: flex;
            align-items: center;
            padding: 0;
        }

        #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-item {
            position: relative;
            margin: 0 5px;
        }

        #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);
        }

        /* Highlight "批量工具" in nav */
        #yk-portal-v2 .yk-legacy-tool .nav-item .nav-link[href="program_list.html"]:before {
             transform: translateX(-50%) scale(1);
        }
        #yk-portal-v2 .yk-legacy-tool .nav-item .nav-link[href="program_list.html"] {
             color: var(--accent-color) !important;
             text-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
        }
        /* End Highlight */


        #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);
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler {
            border: none;
            outline: none;
            padding: 0;
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon {
            background-image: none;
            position: relative;
            width: 24px;
            height: 17px;
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:before,#yk-portal-v2 .yk-legacy-tool 
        .navbar-dark .navbar-toggler-icon:after,#yk-portal-v2 .yk-legacy-tool 
        .navbar-dark .navbar-toggler-icon span {
            width: 100%;
            height: 2px;
            background-color: #fff;
            border-radius: 3px;
            position: absolute;
            left: 0;
            transition: all .3s ease;
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:before,#yk-portal-v2 .yk-legacy-tool 
        .navbar-dark .navbar-toggler-icon:after {
            content: '';
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:before {
            top: 0;
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon span {
            top: 50%;
            transform: translateY(-50%);
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler-icon:after {
            bottom: 0;
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon:before {
            transform: translateY(7px) rotate(45deg);
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon:after {
            transform: translateY(-7px) rotate(-45deg);
        }

        #yk-portal-v2 .yk-legacy-tool .navbar-dark .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon span {
            opacity: 0;
        }

        /* Page Specific Styles */
        #yk-portal-v2 .yk-legacy-tool .page-header {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 80px 0 40px; /* Increased padding */
            text-align: center;
            margin-top: 60px; /* Adjust based on navbar height */
            position: relative;
            overflow: hidden;
        }

        #yk-portal-v2 .yk-legacy-tool .page-header h1 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 15px;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }

        #yk-portal-v2 .yk-legacy-tool .page-header p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 30px; /* Added bottom margin */
            opacity: 0.9;
        }

         /* Animated background elements for header */
        #yk-portal-v2 .yk-legacy-tool .header-bg-elements {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
        }
        #yk-portal-v2 .yk-legacy-tool .header-bg-elements .circle {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            animation: yk2fe2036c4b2a5116-float 15s infinite ease-in-out alternate;
        }
        #yk-portal-v2 .yk-legacy-tool .header-bg-elements .circle:nth-child(1) { width: 150px; height: 150px; top: 10%; left: 5%; animation-duration: 18s; }
        #yk-portal-v2 .yk-legacy-tool .header-bg-elements .circle:nth-child(2) { width: 80px; height: 80px; top: 60%; left: 80%; animation-duration: 12s; }
        #yk-portal-v2 .yk-legacy-tool .header-bg-elements .circle:nth-child(3) { width: 50px; height: 50px; top: 30%; left: 40%; animation-duration: 20s; }
        #yk-portal-v2 .yk-legacy-tool .header-bg-elements .circle:nth-child(4) { width: 100px; height: 100px; top: 75%; left: 15%; animation-duration: 16s; }

        @keyframes yk2fe2036c4b2a5116-float {
            0% { transform: translateY(0px) rotate(0deg); }
            100% { transform: translateY(-20px) rotate(15deg); }
        }


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

        #yk-portal-v2 .yk-legacy-tool .content-section h2 {
            font-size: 2.2rem;
            font-weight: 600;
            color: var(--secondary-color);
            margin-bottom: 40px;
            text-align: center;
            position: relative;
            padding-bottom: 15px;
        }
        #yk-portal-v2 .yk-legacy-tool .content-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }

         #yk-portal-v2 .yk-legacy-tool .content-section h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 20px;
            margin-top: 30px;
         }

        #yk-portal-v2 .yk-legacy-tool .software-image {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
            margin-bottom: 40px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        #yk-portal-v2 .yk-legacy-tool .software-image:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
        }

        #yk-portal-v2 .yk-legacy-tool .feature-list li,#yk-portal-v2 .yk-legacy-tool  .usage-guide li,#yk-portal-v2 .yk-legacy-tool  .scenario-list li {
            margin-bottom: 15px;
            padding-left: 25px;
            position: relative;
            font-size: 1.05rem;
            line-height: 1.7;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-list i,#yk-portal-v2 .yk-legacy-tool  .usage-guide i,#yk-portal-v2 .yk-legacy-tool  .scenario-list i {
            position: absolute;
            left: 0;
            top: 6px;
            color: var(--accent-color);
            font-size: 1rem;
        }

        #yk-portal-v2 .yk-legacy-tool .download-section {
            background-color: #e9ecef;
            padding: 40px 0;
            text-align: center;
        }

        #yk-portal-v2 .yk-legacy-tool .download-btn {
            background-color: var(--primary-color);
            color: white;
            padding: 15px 40px;
            font-size: 1.2rem;
            font-weight: 600;
            border-radius: 50px;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s ease;
            display: inline-block;
            box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
            text-decoration: none; /* Ensure it looks like a button */
        }

        #yk-portal-v2 .yk-legacy-tool .download-btn:hover {
            background-color: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(30, 64, 175, 0.4);
        }
        #yk-portal-v2 .yk-legacy-tool .download-btn i {
            margin-right: 10px;
        }

        @media (max-width: 991px) {
            #yk-portal-v2 .yk-legacy-tool .navbar-collapse {
                background-color: rgba(13, 25, 49, 0.98);
                padding: 20px;
                border-radius: 10px;
                margin-top: 15px;
                box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            }
            #yk-portal-v2 .yk-legacy-tool .navbar-nav .nav-item {
                margin: 5px 0;
            }
            #yk-portal-v2 .yk-legacy-tool .navbar-brand img {
                height: 36px;
            }
            #yk-portal-v2 .yk-legacy-tool .brand-text {
                font-size: 1.3rem;
            }
            #yk-portal-v2 .yk-legacy-tool .page-header h1 { font-size: 2.4rem; }
            #yk-portal-v2 .yk-legacy-tool .page-header p { font-size: 1.1rem; }
            #yk-portal-v2 .yk-legacy-tool .content-section h2 { font-size: 2rem; }
        }

        @media (max-width: 767px) {
             #yk-portal-v2 .yk-legacy-tool .page-header { padding: 60px 0 30px; }
             #yk-portal-v2 .yk-legacy-tool .content-section { padding: 40px 0; }
        }

        @media (max-width: 575px) {
            #yk-portal-v2 .yk-legacy-tool .navbar-brand img {
                height: 32px;
            }
            #yk-portal-v2 .yk-legacy-tool .brand-text {
                font-size: 1.2rem;
            }
            #yk-portal-v2 .yk-legacy-tool .page-header h1 { font-size: 2rem; }
            #yk-portal-v2 .yk-legacy-tool .page-header p { font-size: 1rem; padding: 0 15px;}
            #yk-portal-v2 .yk-legacy-tool .content-section h2 { font-size: 1.8rem; }
            #yk-portal-v2 .yk-legacy-tool .download-btn { padding: 12px 30px; font-size: 1.1rem; }
        }