/* 桌面端只隐藏新增的手机导航入口，其余覆盖严格限制在窄屏断点内。 */
.workspace-mobile-bar, .auth-mobile-close { display: none; }

@media (max-width: 991.98px) {
    /* 保持文字可读；输入框使用 16px，避免 iOS 聚焦时自动放大页面。 */
    html { font-size: 100%; }
    body { overflow-wrap: anywhere; }
    .form-control, .form-select, .input-group-auth input { font-size: 16px; min-width: 0; }
    input[type="file"] { max-width: 100%; }
    .row > *, .card, .card-body, .modal-body { min-width: 0; }
    .btn, .form-control, .form-select { min-height: 44px; }
    .btn { white-space: normal; }
    .btn-close { flex-shrink: 0; }
    .auth-mobile-close {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        top: 4px;
        right: 4px;
        width: 44px;
        height: 44px;
        border: 0;
        border-radius: 12px;
        background: rgba(0, 0, 0, 0.2);
        color: #fff;
        z-index: 1;
    }
    .table-responsive, .table-editable-container, .dp-preview-table-wrap {
        max-width: 100%;
        overflow-x: auto;
        overscroll-behavior-x: contain;
        -webkit-overflow-scrolling: touch;
    }
    /* 数据列保持原结构，只在表格内滚动，不通过裁剪整页掩盖溢出。 */
    .table-responsive table, .table-editable-container table { overflow-wrap: normal; }
    .modal-dialog { max-width: calc(100% - 24px); margin: 12px auto; }
    .modal-content { max-height: calc(100dvh - 24px); }
    .modal-body { overflow-y: auto; }
    .modal-header, .modal-footer { flex-shrink: 0; gap: 8px; }
    .offcanvas { max-width: 100%; }

    /* 全站导航展开后单独滚动，横屏和软键盘下仍能访问末尾入口。 */
    .navbar-toggler {
        min-width: 44px;
        min-height: 44px;
        color: var(--text-primary);
        border-color: var(--border-color);
    }
    .navbar-toggler-icon {
        background-image: none;
        width: 22px;
        height: 16px;
        border-top: 2px solid currentColor;
        border-bottom: 2px solid currentColor;
        position: relative;
    }
    .navbar-toggler-icon::after {
        content: '';
        position: absolute;
        left: 0;
        right: 0;
        top: 5px;
        border-top: 2px solid currentColor;
    }
    #navbarNav { max-height: calc(100dvh - 72px); overflow-y: auto; }
    #navbarNav .nav-link, #navbarNav .dropdown-item { min-height: 44px; padding: 10px 12px; }
    #navbarNav .navbar-nav.ms-auto { gap: 8px; padding-bottom: 8px; }
    #navbarNav .dropdown-menu { max-width: 100%; }
    #navbarNav .dropdown-item { white-space: normal; }

    /* 手机和平板采用文档纵向滚动，浏览器地址栏变化不再截断工作区。 */
    .analysis-container, .data-processing-container {
        flex-direction: column !important;
        height: auto;
        min-height: calc(100dvh - var(--statau-navbar-offset));
        overflow: visible;
    }
    .analysis-container .content-area, .dp-content {
        flex: 1 0 auto;
        width: 100%;
        min-width: 0;
        height: auto;
        overflow: visible;
    }
    .workspace-mobile-bar {
        display: block;
        position: sticky;
        top: var(--statau-navbar-offset);
        z-index: 40;
        padding: 8px 12px;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
    }
    .workspace-menu-toggle {
        display: flex;
        align-items: center;
        gap: 8px;
        width: 100%;
        min-height: 44px;
        padding: 8px 12px;
        border: 1px solid var(--border-color);
        border-radius: 12px;
        background: var(--bg-elevated);
        color: var(--text-primary);
        text-align: left;
        font-size: 0.9rem;
    }
    .workspace-menu-toggle > span:first-of-type { flex-shrink: 0; }
    .workspace-current-selection {
        margin-left: auto;
        min-width: 0;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
        color: var(--accent-primary);
        font-size: 0.8rem;
    }
    .workspace-menu-toggle[aria-expanded="true"] > .bi-chevron-down { transform: rotate(180deg); }
    #sidebar.workspace-navigation, .dp-sidebar.workspace-navigation {
        display: none;
        width: 100%;
        height: auto;
        max-height: 55dvh;
        overflow-y: auto;
        overscroll-behavior-y: contain;
        padding: 8px 0;
        border-right: 0;
        border-bottom: 1px solid var(--border-color);
    }
    #sidebar.is-mobile-open, .dp-sidebar.is-mobile-open { display: block; }
    .workspace-navigation .nav-link-sidebar, .workspace-navigation .dp-nav-link {
        width: 100%;
        min-height: 44px;
        padding: 12px 16px;
        border-radius: 0;
        border-width: 0 0 0 2px;
        text-align: left;
    }
    .workspace-navigation .sidebar-header, .dp-sidebar-group-title { font-size: 0.8rem; padding: 12px 16px 6px; }
    .workspace-navigation i { flex-shrink: 0; }
    .analysis-main { padding: 12px 12px 32px; }
    .analysis-topbar { position: static; grid-template-columns: minmax(0, 1fr); padding: 8px 12px; }
    .analysis-tabs-list { min-width: 0; }
    .analysis-tab-chip { flex-shrink: 0; min-height: 44px; }
    .analysis-tabs-actions { justify-content: flex-end; flex-wrap: wrap; }
    .analysis-tab-tool { min-width: 44px; min-height: 44px; }
    .analysis-tab-close { width: 32px; height: 32px; }
    #upload-card .card-body, #upload-card .card-body > .d-flex { flex-wrap: wrap; gap: 10px; min-width: 0; }
    #upload-card .card-body > .d-flex { width: 100%; }
    #fileInput { width: 100% !important; flex: 1 1 220px; }
    #file-status { overflow-wrap: anywhere; }
    .analysis-module .card-header { flex-wrap: wrap; gap: 10px; }
    .analysis-module .card-header > .d-flex { flex-wrap: wrap; min-width: 0; }
    .analysis-module .card-header h6 { font-size: 1rem; line-height: 1.5; }
    .analysis-module .card-body { padding: 16px; }
    .analysis-module [id$="-table-output"], .analysis-module [id$="-chart-output"] { min-width: 0; max-width: 100%; overflow-x: auto; }
    .analysis-module img { max-width: 100%; height: auto; }
    .analysis-module .d-flex.gap-2, #regression-standard-run-buttons { flex-wrap: wrap; }
    .analysis-boot-loader, .dp-boot-loader { position: fixed; top: var(--statau-navbar-offset); }
    .analysis-frame-loader { position: fixed; inset: var(--statau-navbar-offset) 12px 12px; }

    .dp-topbar { position: static; flex-direction: column; padding: 12px; }
    .dp-state-summary { flex-wrap: wrap; }
    .dp-topbar-actions { flex-wrap: wrap; }
    .dp-workspace { flex: none; overflow: visible; padding: 12px; }
    .dp-footerbar {
        position: static;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 12px calc(76px + env(safe-area-inset-bottom, 0px));
    }
    .dp-footer-left, .dp-footer-right { width: 100%; justify-content: flex-start; }
    .dp-card-actions, .dp-module-heading { flex-wrap: wrap; }
    .dp-source-card .dp-card-actions .btn { height: auto; min-height: 44px; }
    .dp-file-input-control { min-height: 44px; }
    .dp-column-peek-zone {
        top: auto;
        bottom: calc(12px + env(safe-area-inset-bottom, 0px));
        right: 12px;
        width: 176px;
        height: 48px;
        transform: none;
        z-index: 43;
    }
    .dp-column-peek { right: 0; transform: none; min-height: 44px; }
    .dp-meta-overlay { z-index: 41; }
    .dp-meta-drawer { z-index: 42; bottom: calc(72px + env(safe-area-inset-bottom, 0px)); }
    /* 隐藏抽屉也必须退出键盘导航；打开时延续既有事件。 */
    .dp-meta-drawer:not(.is-open) { visibility: hidden; }

    .legal-page { padding: 28px 0 48px !important; }
    .legal-card { padding: 24px 18px !important; }
    .legal-layout { grid-template-columns: minmax(0, 1fr) !important; }
    .legal-layout > aside { position: static !important; }
    .legal-layout article [id] { scroll-margin-top: calc(var(--statau-navbar-offset) + 16px); }

    /* 后台网格的默认最小宽度会被统计图和宽表撑开，滚动限制在各面板内。 */
    .admin-workspace, .finance-workspace, .errors-workspace, .detail-workspace {
        grid-template-columns: minmax(0, 1fr);
        min-width: 0;
    }
    :is(.admin-workspace, .finance-workspace, .errors-workspace, .detail-workspace) :is(section, article, div) {
        min-width: 0;
    }
    :is(.admin-workspace, .finance-workspace, .errors-workspace, .detail-workspace) .chart-canvas {
        max-width: 100%;
        overflow-x: auto;
    }
    .table-shell { max-width: 100%; overflow-x: auto; }
}

@media (max-width: 575.98px) {
    .auth-modal-dialog { max-width: calc(100% - 24px); }
    .auth-modal-content { max-height: calc(100dvh - 24px); }
    .auth-form-container { padding: 20px 16px; }
    .auth-code-row { flex-direction: column; }
    .auth-code-row > div, .auth-code-row > .btn { width: 100%; min-width: 0; }
    .modal-body .input-group { flex-wrap: wrap; }
    .db-stats { flex-wrap: wrap; gap: 20px; }
    .db-content-header { flex-wrap: wrap; gap: 12px; }
    .list-view .db-var-card { flex-direction: column; align-items: stretch; gap: 12px; }
    .list-view .db-var-card-head, .list-view .db-var-meta { min-width: 0; justify-content: flex-start; }
    .db-pagination { flex-wrap: wrap; }
    .hero-section { min-height: auto; }
    .dp-state-metrics { width: 100%; }
    .dp-metric-chip { flex: 1; min-width: 0; }
    .finance-workspace .toolbar-grid, .detail-workspace .metric-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 389.98px) {
    /* 保留验证码 300px 原始坐标，缩小外边距而不缩放拖动距离。 */
    .slider-captcha-modal-overlay { padding: 4px; }
    .slider-captcha-modal-card { padding: 12px 4px; }
}