/* ============================================================
   开创AI智能校区 · 手机端适配层  v1  (2026-10-22 姜总令)
   原则：只在 <=980px 生效，电脑端一个像素都不改。
   ============================================================ */
@media screen and (max-width: 980px) {

  /* 1. 基础：禁横向溢出，允许惯性滚动 */
  html, body {
    width: 100% !important;
    max-width: 100% !important;
    overflow-x: hidden !important;
    -webkit-text-size-adjust: 100% !important;
  }
  * { box-sizing: border-box; }

  /* 2. 主内容区：解除侧栏留白，铺满屏幕 */
  .main, .content, .wrap, .container, .page, .page-wrap, .app-main, #main {
    margin-left: 0 !important;
    padding-left: 12px !important;
    padding-right: 12px !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    height: auto !important;
    min-height: 0 !important;
    overflow-x: hidden !important;
  }
  .content, .wrap, .container { padding: 12px !important; }

  /* 3. 侧栏/导航：改为抽屉，默认收起 */
  .sidebar, .sb, aside.sidebar, .app-sidebar, .side-nav, .left-nav,
  nav.sidebar, .nav-side, .menu-side, .side-menu {
    position: fixed !important;
    top: 0 !important; left: 0 !important;
    bottom: 0 !important;
    width: 78vw !important;
    max-width: 300px !important;
    z-index: 9998 !important;
    transform: translateX(-100%) !important;
    transition: transform .24s cubic-bezier(.4,0,.2,1) !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
  }
  .sidebar.mf-open, .sb.mf-open, aside.sidebar.mf-open, .app-sidebar.mf-open,
  .side-nav.mf-open, .left-nav.mf-open, nav.sidebar.mf-open, .nav-side.mf-open,
  .menu-side.mf-open, .side-menu.mf-open {
    transform: translateX(0) !important;
    box-shadow: 0 0 40px rgba(0,0,0,.45);
  }

  /* 4. 汉堡按钮 */
  #mfBurger {
    position: fixed !important;
    top: 10px !important; left: 10px !important;
    width: 44px !important; height: 44px !important;
    z-index: 10000 !important;
    display: flex !important;
    align-items: center; justify-content: center;
    background: rgba(15,20,35,.92) !important;
    border: 1px solid rgba(255,255,255,.18) !important;
    border-radius: 12px !important;
    color: #fff !important;
    font-size: 20px !important;
    line-height: 1 !important;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    box-shadow: 0 4px 14px rgba(0,0,0,.3);
  }
  #mfBurger.hide { display: none !important; }

  /* 5. 遮罩 */
  #mfMask {
    position: fixed !important; inset: 0 !important;
    background: rgba(0,0,0,.45) !important;
    z-index: 9997 !important;
    display: none;
  }
  #mfMask.show { display: block !important; }

  /* 6. 表格：横向滑动，不再撑破 */
  .table-wrap, .tbl-wrap, .table-container, .table-responsive, .table-scroll,
  div[class*="table-wrap"], div[class*="tbl-wrap"] {
    overflow-x: auto !important;
    overflow-y: visible !important;
    max-width: 100% !important;
    width: 100% !important;
    -webkit-overflow-scrolling: touch;
  }
  table {
    min-width: 680px !important;
    table-layout: auto !important;
    font-size: 12.5px !important;
  }
  th, td { padding: 8px 6px !important; font-size: 12.5px !important; }
  .no-minw, table.no-minw { min-width: 0 !important; }

  /* 7. iframe：不被压成窄条 */
  iframe {
    width: 100% !important;
    max-width: 100% !important;
    min-height: 72vh !important;
    border: 0 !important;
  }

  /* 8. 弹窗：不出屏 */
  .modal, .dialog, .popup, .modal-box, .modal-content, .confirm-box,
  div[class*="modal"] > div, .overlay > div {
    width: 94vw !important;
    max-width: 94vw !important;
    max-height: 88vh !important;
    overflow-y: auto !important;
    margin: 0 auto !important;
  }

  /* 9. 工具条/筛选/表单：横排改竖排 */
  .toolbar, .toolbar-left, .toolbar-right, .filter-bar, .filter-actions,
  .form-row, .fr, .page-header, .page-header-right, .breadcrumb {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 8px !important;
    width: 100% !important;
  }
  .toolbar-left, .toolbar-right { flex-wrap: wrap; }
  .fg, .filter-field { width: 100% !important; }

  /* 10. 输入框/按钮：手指好点 */
  input, select, textarea {
    font-size: 16px !important;  /* 防 iOS 自动放大 */
    width: 100% !important;
    max-width: 100% !important;
  }
  button, .btn { min-height: 42px; font-size: 14px !important; }
  .btn-sm, button.small { min-height: 34px; }

  /* 11. 统计卡片：两列，窄屏一列 */
  .kpi, .kpi-grid, .stat-grid, .cards, .card-grid, .g2, .g3, .g4 {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 10px !important;
  }
  .kpi > div, .kpi-grid > div, .stat-grid > div { min-width: 0 !important; }

  /* 12. 长文本不乱断 */
  h1, h2, h3 { word-break: keep-all; overflow-wrap: anywhere; }
  .nowrap, td, th { white-space: normal; }

  /* 13. 顶部留出汉堡按钮空间 */
  body { padding-top: 56px !important; }
  body.mf-nopad { padding-top: 0 !important; }
}

@media screen and (max-width: 560px) {
  .kpi, .kpi-grid, .stat-grid, .cards, .card-grid, .g2, .g3, .g4 {
    grid-template-columns: 1fr !important;
  }
  table { min-width: 620px !important; }
  .content, .wrap, .container { padding: 10px !important; }
}

/* 2026-10-22 追加：工作台 teacher.html 专用侧栏 .sa-sidebar（原名不在通用选择器里） */
@media screen and (max-width: 980px){
  .sa-sidebar{
    width:80vw !important; max-width:300px !important;
    height:100vh !important;
    position:fixed !important; top:0 !important; left:0 !important; bottom:0 !important;
    transform:translateX(-100%) !important;
    transition:transform .24s ease !important;
    z-index:9998 !important;
    overflow-y:auto !important;
  }
  .sa-sidebar.mf-open{ transform:translateX(0) !important; box-shadow:0 0 44px rgba(0,0,0,.55) !important; }
  .sa-nav{ padding:12px 10px !important; }
  .wrap{
    margin-left:0 !important; margin-right:0 !important;
    padding:0 10px !important; width:100% !important; max-width:100% !important;
  }
}