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

        /* Navbar styles copied from header.php */
        /* Removed :root definition to avoid conflict with external style.css */
        
        #yk-portal-v2 .yk-legacy-tool .navbar {
            /* Use variable from style.css or fallback */
            background-color: var(--nav-bg-color, rgba(13, 25, 49, 0.85)); 
            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;
            /* Assuming this specific color should be kept for scrolled state */
            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%;
            /* Use variable from style.css or fallback */
            background-color: var(--accent-color, #3B82F6); 
            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 {
            /* Use variable from style.css or fallback */
            color: var(--accent-color, #3B82F6) !important; 
            /* Text shadow might need adjustment based on actual accent color */
            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);
        }
        
        #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;
            }
        }
        
        @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;
            }
        }
    

        /* 页面特定样式 */
        #yk-portal-v2 .yk-legacy-tool {
            padding-top: 80px; /* 避免内容被固定导航栏遮挡 */
            background-color: #f8f9fa;
        }
        
        #yk-portal-v2 .yk-legacy-tool main.container {
            padding-left: 20px; /* 添加左内边距 */
            padding-right: 20px; /* 添加右内边距 */
        }
        
        #yk-portal-v2 .yk-legacy-tool .page-header {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.8), rgba(30, 64, 175, 0.9)), none no-repeat center center; /* 添加一个AI相关的背景图 */
            background-size: cover;
            color: #fff;
            padding: 60px 0;
            text-align: center;
            margin-bottom: 40px;
            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;
            opacity: 0.9;
        }
        /* 添加一些装饰性元素 */
        #yk-portal-v2 .yk-legacy-tool .page-header::before {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -50px;
            width: 150px;
            height: 150px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            filter: blur(20px);
            opacity: 0.5;
        }
        #yk-portal-v2 .yk-legacy-tool .page-header::after {
            content: '';
            position: absolute;
            top: -30px;
            right: -30px;
            width: 100px;
            height: 100px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            filter: blur(15px);
            opacity: 0.6;
        }

        #yk-portal-v2 .yk-legacy-tool .content-section {
            background-color: #fff;
            padding: 50px 30px; /* 增加左右内边距 */
            margin-bottom: 40px;
            border-radius: 10px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.05);
        }
        #yk-portal-v2 .yk-legacy-tool .content-section h2 {
            text-align: center;
            margin-bottom: 40px;
            font-weight: 700;
            /* Use variable from style.css or fallback */
            color: var(--primary-color, #2c3e50); 
            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: 60px;
            height: 4px;
            /* Use variable from style.css or fallback */
            background-color: var(--accent-color, #e74c3c); 
            border-radius: 2px;
        }

        #yk-portal-v2 .yk-legacy-tool .feature-item,#yk-portal-v2 .yk-legacy-tool  .usage-step,#yk-portal-v2 .yk-legacy-tool  .scenario-item {
            margin-bottom: 30px;
            display: flex;
            align-items: flex-start;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-icon,#yk-portal-v2 .yk-legacy-tool  .usage-number,#yk-portal-v2 .yk-legacy-tool  .scenario-icon {
            font-size: 1.8rem;
            /* Use variable from style.css or fallback */
            color: var(--primary-color, #2c3e50); 
            margin-right: 20px;
            flex-shrink: 0;
            width: 40px;
            height: 40px; /* 添加固定高度，与宽度相同确保是圆形 */
            text-align: center;
            margin-top: 5px;
            display: flex; /* 添加flex布局 */
            align-items: center; /* 垂直居中 */
            justify-content: center; /* 水平居中 */
            border-radius: 50%; /* 保持圆形 */
        }
        #yk-portal-v2 .yk-legacy-tool .usage-number {
            font-weight: 700;
            line-height: 1.2; /* 调整行高使数字垂直居中更好看 */
        }
        #yk-portal-v2 .yk-legacy-tool .feature-content h5,#yk-portal-v2 .yk-legacy-tool  .usage-content h5,#yk-portal-v2 .yk-legacy-tool  .scenario-content h5 {
            font-weight: 600;
            margin-bottom: 8px;
            color: #333;
        }
        #yk-portal-v2 .yk-legacy-tool .feature-content p,#yk-portal-v2 .yk-legacy-tool  .usage-content p,#yk-portal-v2 .yk-legacy-tool  .scenario-content p {
            color: #555;
            line-height: 1.7;
        }

        #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, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
         #yk-portal-v2 .yk-legacy-tool .software-screenshot img:hover {
            transform: scale(1.03);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }

        #yk-portal-v2 .yk-legacy-tool .download-section {
            text-align: center;
            padding: 40px 0;
        }
        #yk-portal-v2 .yk-legacy-tool .download-btn {
            display: inline-block;
            padding: 15px 40px;
            /* Use variables from style.css or fallback */
            background: linear-gradient(45deg, var(--primary-color, #2c3e50), var(--accent-color, #e74c3c)); 
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s ease;
            /* Adjusted shadow color for potential fallback accent color */
            box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4); 
        }
        #yk-portal-v2 .yk-legacy-tool .download-btn:hover {
            /* Use variables from style.css or fallback */
            background: linear-gradient(45deg, var(--accent-color, #e74c3c), var(--primary-color, #2c3e50)); 
            transform: translateY(-3px);
             /* Adjusted shadow color for potential fallback accent color */
            box-shadow: 0 8px 20px rgba(231, 76, 60, 0.5); 
            color: #fff;
        }
        #yk-portal-v2 .yk-legacy-tool .download-placeholder {
            background-color: #e9ecef;
            padding: 20px;
            border-radius: 8px;
            color: #6c757d;
            font-style: italic;
            margin-top: 20px;
        }
        /* 调整移动端标题大小 */
        @media (max-width: 768px) {
            #yk-portal-v2 .yk-legacy-tool .page-header h1 {
                font-size: 2.2rem;
            }
            #yk-portal-v2 .yk-legacy-tool .page-header p {
                font-size: 1rem;
            }
            #yk-portal-v2 .yk-legacy-tool .content-section h2 {
                 font-size: 1.8rem;
            }
        }