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(width<=860px){.app-layout{--app-sider-width:0px;--app-content-x:16px}.app-sider{width:212px!important;min-width:212px!important}.app-content{padding:16px;overflow-x:auto}.stats-grid,.activity-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-header,.dashboard-header-actions{flex-direction:column;align-items:stretch}.dashboard-header-actions{justify-content:flex-start}.dashboard-header-actions .arco-radio-group,.dashboard-header-actions .arco-btn{width:100%}.dashboard-summary-grid,.dashboard-main-grid,.dashboard-bottom-grid,.dashboard-signal-grid{grid-template-columns:1fr}.dashboard-trend-row{grid-template-columns:44px minmax(0,1fr)}.dashboard-trend-meta{grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-todo-item{grid-template-columns:4px 52px minmax(0,1fr) auto}.invoice-stats-grid,.invoice-category-grid,.dashboard-cards,.two-column-layout{grid-template-columns:1fr}.ai-chat-toolbar{flex-direction:column}.ai-chat-layout{grid-template-columns:1fr}.ai-chat-history{max-height:180px}.ai-chat-composer{left:var(--app-content-x)}.chat-message{max-width:100%}.modal-form-grid,.menu-transfer{grid-template-columns:1fr}.landing-hero{grid-template-columns:1fr;min-height:auto;padding:44px 0}.landing-hero-copy h1{font-size:48px}.landing-promo-grid,.publish-promo-grid{grid-template-columns:1fr}.landing-section{padding:48px 0}}