.collapsible-section{background:var(--cs-bg,#fff);border:none;border-radius:0;margin-bottom:0}.collapsible-header{background:var(--cs-header-bg,#f5f7fa);cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none;color:var(--cs-header-color,#303133);border-bottom:1px solid var(--cs-border-color,#ebeef5);align-items:center;gap:6px;padding:8px 12px;font-size:13px;font-weight:600;transition:background .15s;display:flex}.collapsible-header:hover{background:var(--cs-header-hover-bg,#ecf5ff)}.collapsible-arrow{color:var(--cs-arrow-color,#909399);flex-shrink:0;font-size:12px;transition:transform .25s}.collapsible-arrow.is-expanded{transform:rotate(0)}.collapsible-arrow:not(.is-expanded){transform:rotate(-90deg)}.collapsible-title{flex:1}.collapsible-body{padding:10px 12px 4px}.collapsible-body .el-form-item{margin-bottom:10px}