/* ============================================================
   responsive.css —— 响应式适配（断点 1024 / 768 / 480）
   桌面：240px 侧边栏 + 主区
   平板(768-1024)：图标折叠侧边栏
   手机(<768)：底部 Tab 栏，聊天全屏吸底
   ============================================================ */

/* ≥1024 默认（已在 layout.css 定义完整侧边栏），此处仅做微调 */
@media (min-width: 1024px) {
  .sidebar { width: var(--sidebar-w); flex-basis: var(--sidebar-w); }
  .nav-item .ni-label { display: inline; }
}

/* ---- 768 ~ 1024：折叠为图标侧边栏 ---- */
@media (max-width: 1024px) {
  :root { --sidebar-w: var(--sidebar-w-mini); }
  .sidebar { width: var(--sidebar-w-mini); flex-basis: var(--sidebar-w-mini); }
  .sidebar-brand .txt, .sidebar-role, .nav-item .ni-label { display: none; }
  .sidebar-brand { justify-content: center; padding: 18px 0; }
  .nav-item { justify-content: center; padding: 12px 0; }
  .nav-item .ni-ico { font-size: 20px; }
  .sidebar-foot { display: none; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

/* ---- <768：侧边栏变底部 Tab 栏，聊天全屏 ---- */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .hamburger { display: inline-flex; }
  .tabbar { display: flex; }
  .main { padding-bottom: calc(58px + env(safe-area-inset-bottom)); }
  .content { padding: 14px; }
  .topbar { padding: 0 14px; height: 54px; }
  .topbar .tb-title { font-size: 15px; }
  /* 移动端侧边栏以抽屉形式出现 */
  .sidebar.mobile-open {
    display: flex; position: fixed; left: 0; top: 0; bottom: 0; z-index: 50;
    width: 240px; flex-basis: 240px; box-shadow: var(--shadow-lg);
  }
  .sidebar.mobile-open .sidebar-brand .txt,
  .sidebar.mobile-open .sidebar-role,
  .sidebar.mobile-open .nav-item .ni-label { display: inline; }
  .sidebar.mobile-open .sidebar-brand { justify-content: flex-start; padding: 18px; }
  .sidebar.mobile-open .nav-item { justify-content: flex-start; padding: 11px 12px; }
  .sidebar.mobile-open .nav-item .ni-ico { font-size: 16px; }
  .sidebar.mobile-open .sidebar-foot { display: block; }

  /* 网格转单列 */
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .portal-grid { flex-direction: column; }
  .portal-card { width: 100%; max-width: 360px; min-height: auto; }
  .portal-head { padding: 36px 20px 4px; }
  .portal-head h1 { font-size: 24px; }

  /* 表格转横向滚动 */
  .table-wrap { overflow-x: auto; }
  table.tbl { min-width: 640px; }

  /* 模态框接近全屏 */
  .modal { max-width: 96vw; max-height: 92vh; }
  .drawer { width: 100%; max-width: 100vw; }

  /* 聊天页：顶栏精简，输入吸底 */
  .chat-head { padding: 10px 12px; gap: 8px; }
  .chat-foot { padding: 8px 10px calc(8px + env(safe-area-inset-bottom)); }
  .msg { max-width: 90%; }
  .score-pill { font-size: 13px; padding: 4px 10px; }
}

/* ---- <480：更紧凑 ---- */
@media (max-width: 480px) {
  body { font-size: 14px; }
  .topbar .tb-sub { display: none; }
  .content { padding: 10px; }
  .card { padding: 14px; }
  .portal-head p { font-size: 13px; }
  .case-grid { grid-template-columns: 1fr; }
  .report .r-key { flex-basis: 92px; }
}