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

        /* Header Styles (from header.php, adjusted) */
        #yk-portal-v2 .yk-legacy-tool {
           padding-top: 60px; /* Adjust based on fixed navbar height */
           font-family: 'Poppins', 'Nunito', sans-serif; /* Example font stack */
        }

        #yk-portal-v2 .yk-legacy-tool {
            --primary-color: #2563EB;
            --secondary-color: #1E40AF;
            --accent-color: #3B82F6;
            --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 {
            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);
        }

        /* Make '批量工具' link active */
        #yk-portal-v2 .yk-legacy-tool .nav-item.active .nav-link {
             color: rgba(255, 255, 255, 0.9) !important; /* Reset default active color */
             text-shadow: none; /* Reset default active text shadow */
        }
         #yk-portal-v2 .yk-legacy-tool .nav-item.active .nav-link:before {
             transform: translateX(-50%) scale(0); /* Hide dot for default active */
         }


        #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);
        }

         /* Specific style for the currently active page link */
        #yk-portal-v2 .yk-legacy-tool .nav-item a[href="program_list.html"] { /* Target the parent list page 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 a[href="program_list.html"]:before {
            transform: translateX(-50%) scale(1) !important;
         }


        #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;
        }

        @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 {
               padding-top: 70px; /* Adjust for smaller navbar */
            }
        }

        @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 {
               padding-top: 65px; /* Adjust for smallest navbar */
            }
        }

        /* Page Specific Styles */
        #yk-portal-v2 .yk-legacy-tool .page-header {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.8), rgba(29, 78, 216, 0.9)), none center center no-repeat; /* Add a relevant background image if available */
            background-size: cover;
            padding: 5rem 0;
            color: white;
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
            overflow: hidden;
        }
        #yk-portal-v2 .yk-legacy-tool .page-header h1 {
            font-weight: 700;
            font-size: 3rem;
            margin-bottom: 0.5rem;
            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;
            opacity: 0.9;
        }

         /* Subtle pattern overlay for header */
        #yk-portal-v2 .yk-legacy-tool .page-header::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at top left, rgba(255,255,255,0.05) 0%, transparent 30%),
                        radial-gradient(circle at bottom right, rgba(255,255,255,0.05) 0%, transparent 30%);
            opacity: 0.5;
            pointer-events: none; /* Ensure it doesn't block interactions */
        }


        #yk-portal-v2 .yk-legacy-tool .content-section {
            padding: 3rem 0;
        }
        #yk-portal-v2 .yk-legacy-tool .content-section h2 {
            font-weight: 600;
            color: var(--secondary-color);
            margin-bottom: 2rem;
            text-align: center;
            position: relative;
            padding-bottom: 10px;
        }
        #yk-portal-v2 .yk-legacy-tool .content-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-box,#yk-portal-v2 .yk-legacy-tool  .scenario-box,#yk-portal-v2 .yk-legacy-tool  .guide-step {
            background: #fff;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            margin-bottom: 2rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-align: left; /* Align text left for readability */
            height: 100%; /* Ensure equal height for boxes in a row */
        }
        #yk-portal-v2 .yk-legacy-tool .feature-box:hover,#yk-portal-v2 .yk-legacy-tool  .scenario-box:hover,#yk-portal-v2 .yk-legacy-tool  .guide-step:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
        }
        #yk-portal-v2 .yk-legacy-tool .feature-box h5,#yk-portal-v2 .yk-legacy-tool  .scenario-box h5,#yk-portal-v2 .yk-legacy-tool  .guide-step h5 {
             font-weight: 600;
             color: var(--secondary-color);
             margin-bottom: 1rem; /* Add space below heading */
             display: flex;
             align-items: center;
         }
        #yk-portal-v2 .yk-legacy-tool .feature-box h5 i,#yk-portal-v2 .yk-legacy-tool  .scenario-box h5 i,#yk-portal-v2 .yk-legacy-tool  .guide-step h5 i {
             margin-right: 0.75rem;
             color: var(--primary-color);
             width: 25px; /* Fixed width for alignment */
         }


        #yk-portal-v2 .yk-legacy-tool .software-screenshot img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            display: block;
            margin: 2rem auto; /* Center screenshot */
             border: 1px solid #ddd; /* Subtle border */
        }

        #yk-portal-v2 .yk-legacy-tool .usage-guide ol {
            list-style: none;
            padding-left: 0;
            counter-reset: guide-counter;
        }
        #yk-portal-v2 .yk-legacy-tool .usage-guide li {
            counter-increment: guide-counter;
            margin-bottom: 1.5rem;
            padding-left: 2.5rem;
            position: relative;
            font-size: 1.1rem;
        }
        #yk-portal-v2 .yk-legacy-tool .usage-guide li::before {
            content: counter(guide-counter);
            position: absolute;
            left: 0;
            top: 0;
            width: 30px;
            height: 30px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            font-weight: bold;
            text-align: center;
            line-height: 30px;
            font-size: 0.9rem;
        }

        #yk-portal-v2 .yk-legacy-tool .download-section {
            background-color: #f8f9fa;
            padding: 3rem 0;
            text-align: center;
            border-top: 1px solid #e9ecef;
            border-bottom: 1px solid #e9ecef;
        }

         #yk-portal-v2 .yk-legacy-tool .download-section h2 {
             margin-bottom: 1.5rem;
         }

        #yk-portal-v2 .yk-legacy-tool .download-section p {
             margin-bottom: 1.5rem;
             color: #6c757d;
         }

        #yk-portal-v2 .yk-legacy-tool .btn-download {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
        }
        #yk-portal-v2 .yk-legacy-tool .btn-download:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(29, 78, 216, 0.4);
        }
        #yk-portal-v2 .yk-legacy-tool .btn-download i {
            margin-right: 8px;
        }

         /* Responsive Adjustments */
         @media (max-width: 767px) {
             #yk-portal-v2 .yk-legacy-tool .page-header h1 {
                 font-size: 2.5rem;
             }
             #yk-portal-v2 .yk-legacy-tool .page-header p {
                 font-size: 1rem;
             }
             #yk-portal-v2 .yk-legacy-tool .feature-box,#yk-portal-v2 .yk-legacy-tool  .scenario-box,#yk-portal-v2 .yk-legacy-tool  .guide-step {
                 padding: 1.5rem;
                 text-align: center; /* Center align on smaller screens */
             }
              #yk-portal-v2 .yk-legacy-tool .feature-box h5,#yk-portal-v2 .yk-legacy-tool  .scenario-box h5,#yk-portal-v2 .yk-legacy-tool  .guide-step h5 {
                  justify-content: center; /* Center heading elements */
              }
              #yk-portal-v2 .yk-legacy-tool .usage-guide li {
                 padding-left: 0;
                 text-align: center;
             }
              #yk-portal-v2 .yk-legacy-tool .usage-guide li::before {
                  position: static; /* Remove absolute positioning */
                  display: block;
                  margin: 0 auto 0.5rem auto; /* Center the number */
              }

         }