body {
            font-family: 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            color: #333;
        }
        h2 {
            text-align: center;
            color: #8B0000;
            margin-bottom: 0px;
            font-size: bold;
        }
        .sub3 {
            color: #8B0000;
            text-align: center;
            padding-bottom: 5px;
            margin-top: 5px;
            font-size: 1.25em;
        }
        h3 {
            color: #8B0000;
            border-bottom: 1px solid #8B0000;
            padding-bottom: 3px;
            margin-top: 15px;
        }
        h4 {
            color: #8B0000;
            border-bottom: 1px solid #8B0000;
            padding-bottom: 3px;
            margin-top: 8px;
        }
        .highlight {
            font-weight: bold;
            color: #000000;
        }
        .highlight2 {
            /*font-weight: 600;*/
            color: #0000FF;
        }
        .emphasis {
            font-style: italic;
            color: #8B0000;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            padding: 10px 0 0;
        }
        table, th, td {
            border: 0px solid #ddd;
        }
        th, td {
            padding: 5px;
            vertical-align: top;
            text-align: left;
        }
        th {
          background-color: #f2e6e6;
          color: #b30000;
        }
        tr:nth-child(even) {
          background-color: #f9f9f9;
        }
        .note {
          margin-top: 20px;
          font-size: 14px;
          color: #555;
        }
        
        .plaintext {
            font-family: monospace;
            /*white-space: pre-line;*/
            background-color: #FCEEEE;
            padding: 0px;
            border-radius: 5px;
            overflow-x: auto;
        }
        .promise {
            background-color: #f9f9f9;
            padding: 15px;
            border-left: 4px solid #8B0000;
            margin: 20px 0;
        }
        .declaration {
            text-align: right;
            font-size: 0.9em;
            color: #666;
            border-bottom: 1px dashed #ccc;
            /*padding-top: 10px;*/
            margin-bottom: 30px;
        }
        .logo {
            height: 25px !important;
        }
        .nav-buttons {
            text-align: center;
            /*margin: 5px 5px;*/
            font-size: 0.8em;
        }
        .nav-button {
            display: inline-block;
            padding: 5px 10px;
            margin: 5px 5px;
            background-color: #8B0000;
            color: white;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            transition: background-color 0.3s;
        }
        .nav-button:hover {
            background-color: #A52A2A;
        }
        .nav-button.disabled {
            pointer-events: none; /* Prevent clicks */
            background-color: #ccc; /* Grey background */
            color: #777; /* Dim text color */
            cursor: not-allowed; /* Show disabled cursor */
        }
        .nextPage {
            page-break-before: always;
        }
        .txt-sm {
            font-size: 0.88em;
        }
        .txt-lg {
            font-size: 1.25em;
        }
        ul.txt-sm {
            padding-left: 0;
            margin-left: 0;
            list-style-position: inside;
        }
        li {
            text-align: left;
        }
        ul.txt-sm li {
            margin-bottom: -3px; /* Adjust the value as needed */
        }

        .blink {
          animation: blink-animation 1s steps(2, start) infinite;
          color: yellow;
          font-weight: bold;
        }
        @keyframes blink-animation {
          50% {
            opacity: 0;
          }
        }

        blockquote {
            border-left: 4px solid #8B0000;
            padding-left: 15px;
            margin-left: 0;
            color: #555;
        }
        .tree {
            font-family: monospace;
            white-space: pre;
            line-height: 1.4;
            margin: 5px 0;
        }
        .technique {
            background-color: #f9f9f9;
            padding: 3px;
            border-radius: 5px;
            margin: 5px 0;
        }
        .technique-title {
            font-weight: bold;
            margin-bottom: 2px;
        }
        .example {
            margin-left: 20px;
            color: #666;
        }
        .benefits {
            background-color: #f5f5f5;
            padding: 15px;
            border-radius: 5px;
            margin: 20px 0;
        }
        .benefits ol {
            padding-left: 20px;
        }
        .schedule {
            background-color: #f9f9f9;
            padding: 5px;
            border-left: 4px solid #8B0000;
            margin: 5px 0;
        }
        .instructor {
            background-color: #f5f5f5;
            padding: 15px;
            border-radius: 5px;
            margin: 20px 0;
        }
        .strike { text-decoration: line-through !important; }

        .poster-header {
            background-color: #8B0000;
            color: white;
            padding: 20px;
            text-align: center;
            border-radius: 10px 10px 0 0;
            margin-bottom: 20px;
        }
        .poster-footer {
            background-color: #8B0000;
            color: white;
            padding: 10px;
            text-align: center;
            border-radius: 0 0 10px 10px;
            /*margin-bottom: 20px;*/
        }
        .highlight-box {
            background-color: #FFFAF0;
            border-left: 5px solid #8B0000;
            padding: 15px;
            margin: 10px 0;
        }
        .technique-item {
            background-color: #FFF;
            border-radius: 8px;
            padding: 10px;
            margin-bottom: 5px;
            box-shadow: 0 3px 5px rgba(0,0,0,0.1);
        }
        .benefit-badge {
            display: inline-block;
            background-color: #8B0000;
            color: white;
            padding: 5px 10px;
            border-radius: 15px;
            margin-right: 10px;
            font-size: 0.9em;
        }
        .redTxt{ color: #8B0000 !important; }

        @media print {
            .plaintext {
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
                background-color: #FCEEEE !important;
            }
            .poster-header {
                background-color: #8B0000;
                color: white;
                padding: 20px;
                text-align: center;
                border-radius: 10px 10px 0 0;
                margin-bottom: 10px;
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
                background-color: #8B0000 !important;
            }
            .poster-footer {
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
                background-color: #8B0000;
                color: white;
                padding: 10px;
                text-align: center;
                border-radius: 0 0 10px 10px;
            }
            .benefit-badge {
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
                display: inline-block;
                background-color: #8B0000;
                color: white;
                padding: 5px 10px;
                border-radius: 15px;
                margin-right: 10px;
                font-size: 0.9em;
            }
            .highlight-box {
                -webkit-print-color-adjust: exact;
                print-color-adjust: exact;
                background-color: #FFFAF0;
                border-left: 5px solid #8B0000;
                padding: 15px;
                margin: 10px 0;
            }

            .row {
                display: flex; /* Ensure the row uses flexbox for printing */
                flex-wrap: wrap; /* Allow columns to wrap if needed */
            }

            .col-lg-2,.col-lg-4,.col-lg-6, 
            .col-md-2,.col-md-4,.col-md-6, /* Include all column sizes used in your HTML */
            .col-sm-12,
            .col-md-5 { /* Ensure specific columns take up the desired print width */
                flex: 0 0 50%; /* Force them to take 50% width */
                max-width: 50%; /* Set max width */
                /* You might need to adjust padding/margins for print */
                padding-left: 15px; /* Example: Re-add Bootstrap's default padding */
                padding-right: 15px;
            }
        }


        @media (max-width: 960px) and (orientation: portrait) {
            h2 {
                font-size: 1.25em;
            }
            .sub3 {
                font-size: 0.81em;
            }
        }