.html-escape-tool {
    width: 100%;
    box-sizing: border-box;
}
.html-escape-tool .tool-desc {
    margin-bottom: 20px;
    padding: 12px 16px;
    background: #f8f9fa;
    border-left: 4px solid #3b82f6;
    border-radius: 4px;
    color: #666;
    font-size: 14px;
}
.html-escape-tool .input-area {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.html-escape-tool .form-group {
    display: flex;
    flex-direction: column;
}
.html-escape-tool .form-group label {
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
    color: #333;
}
.html-escape-tool .form-group textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 1px solid #d2d6dc;
    border-radius: 4px;
    font-size: 14px;
    outline: none;
    resize: vertical;
    line-height: 1.6;
    font-family: monospace; 
}
.html-escape-tool .form-group textarea:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
.html-escape-tool .action-area {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.html-escape-tool .action-area button {
    padding: 8px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: 0.2s;
}
.html-escape-tool .js-encode-btn { background: #3b82f6; color: #fff; }
.html-escape-tool .js-encode-btn:hover { background: #2563eb; }
.html-escape-tool .js-decode-btn { background: #10b981; color: #fff; }
.html-escape-tool .js-decode-btn:hover { background: #059669; }
.html-escape-tool .js-clear-btn { background: #6b7280; color: #fff; }
.html-escape-tool .js-clear-btn:hover { background: #4b5563; }

/* ========== 新增表格样式 ========== */
.html-escape-tool .reference-table {
    margin-top: 25px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    overflow: hidden;
}
.html-escape-tool .table-title {
    background-color: #f8f9fa;
    padding: 12px 16px;
    font-weight: 600;
    font-size: 15px;
    color: #333;
    border-bottom: 1px solid #e5e7eb;
}
.html-escape-tool .reference-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.html-escape-tool .reference-table th, 
.html-escape-tool .reference-table td {
    padding: 10px 16px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}
.html-escape-tool .reference-table th {
    background-color: #f9fafb;
    color: #6b7280;
    font-weight: 600;
}
.html-escape-tool .reference-table tr:last-child td {
    border-bottom: none;
}
.html-escape-tool .reference-table tr:hover {
    background-color: #f9fafb;
}
/* 实体名称和编号用等宽字体展示 */
.html-escape-tool .reference-table td:nth-child(2),
.html-escape-tool .reference-table td:nth-child(3) {
    font-family: monospace;
}