/* 积磊·社群：工作台与资料库只读阅读器。
   视觉目标：更接近 SunGet 知识库的工具体验，而不是营销页或后台管理页。 */

/* ------------------------------------------------------------- 社群工作台 */
.community { padding-bottom: 56px; }
.community__bar { border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .9); backdrop-filter: blur(16px); position: sticky; top: 68px; z-index: 40; }
.community__bar-inner { display: flex; align-items: center; gap: 20px; height: 56px; }
.community__title { display: inline-flex; align-items: center; gap: 9px; font-size: 15px; }
.community__tabs { display: flex; gap: 4px; margin-inline-start: 12px; overflow-x: auto; }
.community__tabs a { padding: 7px 13px; border-radius: 999px; color: var(--muted); font-size: 14px; white-space: nowrap; }
.community__tabs a:hover { background: var(--bg-soft); color: var(--ink); }
.community__tabs a.is-active { background: var(--ink); color: #fff; }
.community__bar-user { margin-inline-start: auto; }
.community__layout { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 32px; align-items: start; padding-top: 28px; }
.community-side { position: sticky; top: 148px; display: grid; gap: 20px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); }
.community-side__user { display: flex; align-items: center; gap: 12px; }
.community-side__user strong { display: block; font-size: 15px; }
.community-side__user span.muted { font-size: 12.5px; }
.community-avatar {
  flex: 0 0 auto; width: 44px; height: 44px; display: grid; place-items: center; overflow: hidden;
  border-radius: 50%; background: linear-gradient(135deg, #FF7A3D, var(--brand-strong)); color: #fff;
  font-size: 17px; font-weight: 640;
}
.community-avatar img { width: 100%; height: 100%; object-fit: cover; }
.community-avatar--sm { width: 30px; height: 30px; font-size: 13px; }
.community-side__nav { display: grid; gap: 3px; }
.community-side__nav a { padding: 10px 12px; border-radius: var(--radius-sm); color: var(--muted); font-size: 14px; }
.community-side__nav a:hover { background: var(--bg-soft); color: var(--ink); }
.community-side__nav a.is-active { background: var(--bg-soft); color: var(--ink); font-weight: 620; }
.community-side__foot { display: grid; gap: 12px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13.5px; }
.community-main { min-width: 0; }
.community-panel { display: grid; gap: 20px; }
.community-panel__head { margin-bottom: 4px; }
.community-panel__head h1 { font-size: clamp(24px, 3vw, 34px); margin: 0; }
.community-empty {
  display: grid; justify-items: start; gap: 14px; padding: clamp(28px, 4vw, 52px);
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-warm);
}
.community-empty__art { width: 96px; height: 96px; }
.community-empty__art svg { width: 100%; height: 100%; fill: none; stroke: var(--brand); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; opacity: .8; }
.community-empty h2 { margin: 0; font-size: 22px; }
.community-empty p { margin: 0; max-width: 520px; color: var(--muted); font-size: 14.5px; }

/* ------------------------------------------------------------- 登录注册 */
.community-landing { padding-block: clamp(40px, 5vw, 76px) clamp(56px, 6vw, 96px); background: linear-gradient(180deg, var(--bg-warm), var(--bg) 70%); }
.community-landing__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 68px); align-items: start; }
.community-landing__copy { max-width: 620px; }
.community-landing h1 { margin: 0 0 20px; font-size: clamp(32px, 4.6vw, 54px); }
.community-landing__points { list-style: none; margin: 32px 0 0; padding: 0; display: grid; gap: 14px; }
.community-landing__points li { display: grid; gap: 3px; padding-left: 16px; border-left: 2px solid var(--brand); }
.community-landing__points strong { font-size: 15.5px; }
.community-landing__points span { color: var(--muted); font-size: 14px; }
.community-landing__note { margin-top: 30px; font-size: 13px; max-width: 560px; }
.community-landing__panel { padding: clamp(24px, 3vw, 36px); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--bg); box-shadow: var(--shadow-soft); }
.community-auth__tabs { display: flex; gap: 4px; margin-bottom: 24px; padding: 4px; border-radius: 999px; background: var(--bg-soft); }
.community-auth__tabs button { flex: 1; padding: 9px 0; border: 0; border-radius: 999px; background: none; color: var(--muted); font-size: 14px; cursor: pointer; }
.community-auth__tabs button.is-active { background: #fff; color: var(--ink); font-weight: 640; box-shadow: 0 2px 8px rgba(24, 22, 34, .08); }
.community-auth__form { display: grid; gap: 16px; }
.community-auth__form[hidden] { display: none; }
.field { display: grid; gap: 7px; font-size: 13.5px; }
.field > span { color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%; min-height: 44px; padding: 10px 13px; border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); background: var(--bg); color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid color-mix(in srgb, var(--brand) 40%, transparent); outline-offset: 1px; border-color: var(--brand); }
.community-auth__hint { margin: 0; color: var(--muted-soft); font-size: 12.5px; }
.community-auth__error { margin: 0; padding: 11px 14px; border-radius: var(--radius-sm); background: #FDEDEA; color: #A2281A; font-size: 13.5px; }
.community-auth__error[hidden] { display: none; }

/* ----------------------------------------------------------------- 资料库 */
/* 不要把 overflow 设成 hidden：那会让内侧 sticky 顶栏失去吸附，整页滚到页脚时顶栏被带走。 */
.library { display: flex; flex-direction: column; height: calc(100vh - 68px); background: var(--bg-soft); }
.library__topbar { position: sticky; top: 68px; z-index: 40; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .92); backdrop-filter: blur(16px); }
.library__topbar-inner { width: min(1480px, calc(100% - 32px)); margin-inline: auto; display: flex; align-items: center; gap: 18px; height: 58px; }
.library__brand { display: inline-flex; align-items: center; gap: 9px; font-size: 15px; }
.library__search { position: relative; flex: 1 1 260px; max-width: 420px; margin-inline: auto; }
.library__search input { width: 100%; min-height: 38px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--bg-soft); color: var(--ink); font-size: 13.5px; }
.library__search input:focus { outline: none; border-color: var(--brand); background: #fff; }
.library__results { position: absolute; top: calc(100% + 6px); left: 0; right: 0; z-index: 30; max-height: 340px; overflow-y: auto; padding: 6px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; box-shadow: var(--shadow); }
.library__results[hidden] { display: none; }
.library__results button { display: block; width: 100%; padding: 9px 11px; border: 0; border-radius: 10px; background: none; text-align: left; cursor: pointer; font-size: 13.5px; }
.library__results button:hover { background: var(--bg-soft); }
.library__results small { display: block; margin-top: 2px; color: var(--muted-soft); font-size: 11.5px; }
.library__results p { margin: 8px 10px; color: var(--muted); font-size: 13px; }
.library__account { display: flex; align-items: center; gap: 10px; margin-inline-start: auto; }
.library__account-name { font-size: 13.5px; white-space: nowrap; }
.library__tree-toggle { display: none; padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; background: none; font-size: 13px; cursor: pointer; }
.library__body { flex: 1; min-height: 0; width: min(1480px, calc(100% - 32px)); margin-inline: auto; display: flex; align-items: stretch; }
.library__tree { flex: 0 0 auto; width: 268px; min-width: 200px; max-width: 520px; padding: 16px 10px 28px 0; overflow-y: auto; }
/* 拖拽分隔条：整个 6px 热区都可用，悬停/聚焦/拖动时高亮这条分割线本身。 */
.library__resizer { flex: 0 0 6px; position: relative; border: 0; padding: 0; border-left: 1px solid var(--line); background: none; cursor: col-resize; touch-action: none; }
.library__resizer::before { content: ''; position: absolute; inset: 10px 1px; border-radius: 999px; background: transparent; transition: background .16s; }
.library__resizer:hover::before, .library__resizer:focus-visible::before, .library__resizer.is-dragging::before { background: var(--brand); opacity: .55; }
.library__resizer:focus-visible { outline: none; }
body.library-resizing { cursor: col-resize; user-select: none; }
.library__tree-loading { padding: 10px 12px; color: var(--muted); font-size: 13px; }
.library__tree-empty { padding: 14px 12px; color: var(--muted); font-size: 13px; }
.library-tree__group { display: grid; }
.library-tree__node { display: flex; align-items: center; gap: 7px; width: 100%; padding: 6px 10px; border: 0; border-radius: 8px; background: none; text-align: left; cursor: pointer; font-size: 13.5px; color: var(--ink-soft); }
.library-tree__node:hover { background: rgba(29, 29, 31, .05); }
.library-tree__node.is-active { background: var(--brand-soft); color: var(--brand-strong); font-weight: 620; }
.library-tree__node .library-tree__caret { flex: 0 0 auto; width: 12px; color: var(--muted-soft); font-size: 10px; transition: transform .18s; }
.library-tree__node .library-tree__caret.is-open { transform: rotate(90deg); }
.library-tree__icon { flex: 0 0 auto; width: 16px; height: 16px; }
.library-tree__icon svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.library-tree__name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.library-tree__children { display: grid; padding-left: 14px; }
.library-tree__children[hidden] { display: none; }

/* flex: 1 必写：否则阅读区宽度会退化成「由内容决定」，.sunmind/.canvas 只剩几百像素。 */
.library__reader { flex: 1 1 auto; display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); border-right: 1px solid var(--line); }
.library__tabs { display: flex; gap: 2px; padding: 8px 10px 0; overflow-x: auto; border-bottom: 1px solid var(--line); min-height: 44px; }
.library__tabs:empty { display: none; }
.library-tab { display: inline-flex; align-items: center; gap: 8px; padding: 8px 10px 8px 13px; border: 1px solid transparent; border-bottom: 0; border-radius: 10px 10px 0 0; background: none; color: var(--muted); font-size: 13px; cursor: pointer; white-space: nowrap; }
.library-tab:hover { background: var(--bg-soft); }
.library-tab.is-active { background: var(--bg); border-color: var(--line); color: var(--ink); font-weight: 620; }
.library-tab__close { border: 0; background: none; color: var(--muted-soft); font-size: 15px; line-height: 1; cursor: pointer; padding: 0 2px; }
.library-tab__close:hover { color: var(--brand-strong); }
.library__toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 10px 16px; border-bottom: 1px solid var(--line); min-height: 48px; font-size: 13px; }
.library__toolbar:empty { display: none; }
.library__crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; color: var(--muted); font-size: 12.5px; min-width: 0; }
.library__crumbs button { border: 0; background: none; padding: 0; color: inherit; cursor: pointer; font-size: inherit; }
.library__crumbs button:hover { color: var(--brand-strong); }
.library__tools { display: flex; align-items: center; gap: 8px; margin-inline-start: auto; }
/* 阅读区自己滚动：长 Markdown 只滚动正文，顶栏、工具条与状态栏保持不动。 */
.library__content { flex: 1; min-height: 0; overflow-y: auto; padding: 24px clamp(16px, 3vw, 36px) 40px; }
.library__statusbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 9px 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.library__welcome { max-width: 620px; }
.library__welcome h1 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; }
.library__welcome code { padding: 2px 6px; border-radius: 6px; background: var(--bg-soft); font-family: var(--font-mono); font-size: .9em; }
.library__backdrop { position: fixed; inset: 0; z-index: 45; display: none; background: rgba(20, 18, 26, .4); }
body.library-tree-open .library__backdrop { display: block; }
.library-message { display: grid; gap: 10px; max-width: 620px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-warm); }
.library-message h2 { margin: 0; font-size: 19px; }
.library-message p { margin: 0; color: var(--muted); font-size: 14px; }
.library-fileinfo { display: grid; gap: 12px; max-width: 720px; }
.library-fileinfo dl { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 8px 16px; margin: 0; font-size: 13.5px; }
.library-fileinfo dt { color: var(--muted); }
.library-fileinfo dd { margin: 0; overflow-wrap: anywhere; }
.library-preview { max-width: 100%; }
.library-preview img { max-width: 100%; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.library-preview video { width: 100%; max-height: 70vh; border-radius: var(--radius-sm); background: #000; }
.library-preview iframe { width: 100%; height: min(78vh, 900px); border: 1px solid var(--line); border-radius: var(--radius-sm); }

/* 文本 / Markdown 阅读 */
.library-text { margin: 0; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-soft); font-family: var(--font-mono); font-size: 13px; line-height: 1.75; white-space: pre-wrap; overflow-wrap: anywhere; }
.library-markdown { max-width: 820px; font-size: 15.5px; line-height: 1.8; }
.library-markdown h1 { font-size: 30px; margin: 0 0 18px; }
.library-markdown h2 { font-size: 24px; margin: 38px 0 14px; }
.library-markdown h3 { font-size: 20px; margin: 30px 0 12px; }
.library-markdown h4, .library-markdown h5, .library-markdown h6 { font-size: 17px; margin: 24px 0 10px; }
.library-markdown ul, .library-markdown ol { padding-left: 24px; display: grid; gap: 6px; }
.library-markdown li.md-task { list-style: none; margin-left: -22px; display: flex; align-items: baseline; gap: 8px; }
.library-markdown blockquote { margin: 0 0 18px; padding: 6px 20px; border-left: 3px solid var(--brand); color: var(--muted); }
.library-markdown img { max-width: 100%; margin: 14px 0; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.library-markdown hr { margin: 30px 0; border: 0; border-top: 1px solid var(--line); }
.library-markdown code { padding: 2px 6px; border-radius: 6px; background: var(--bg-soft); font-family: var(--font-mono); font-size: .9em; }
.library-markdown mark { background: #FFF3C4; padding: 0 3px; border-radius: 3px; }
.md-table-wrap { margin: 0 0 20px; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); }
.md-table-wrap table { width: 100%; border-collapse: collapse; font-size: 14px; }
.md-table-wrap th, .md-table-wrap td { padding: 10px 14px; border-bottom: 1px solid var(--line); text-align: left; }
.md-table-wrap thead th { background: var(--bg-soft); font-weight: 640; }
.md-code { margin: 0 0 20px; border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; background: #1D1D1F; }
.md-code__head { display: flex; align-items: center; justify-content: space-between; padding: 8px 14px; border-bottom: 1px solid rgba(255, 255, 255, .1); color: rgba(255, 255, 255, .6); font-size: 11.5px; }
.md-code__copy { border: 1px solid rgba(255, 255, 255, .2); border-radius: 999px; background: none; color: rgba(255, 255, 255, .8); padding: 3px 11px; font-size: 11.5px; cursor: pointer; }
.md-code__copy:hover { background: rgba(255, 255, 255, .12); }
.md-code pre { margin: 0; padding: 16px; overflow-x: auto; }
.md-code code { background: none; color: #F5F5F7; padding: 0; font-size: 12.8px; line-height: 1.7; }
.md-missing { display: inline-block; padding: 3px 9px; border-radius: 6px; background: #FFF3E6; color: #8A5B00; font-size: 13px; }

/* ---------------------------------------------------- Canvas / Sunvas 视图 */
.graph-viewer { position: relative; border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; background: var(--bg-soft); }
/* 铺满阅读区可见高度（顶栏/标签/工具条/状态栏/内边距合计约 340px），
   避免白板与导图还要用户在阅读区里再滚一次。 */
.graph-viewer__stage { width: 100%; height: max(380px, calc(100vh - 340px)); cursor: grab; touch-action: none; }
.graph-viewer__stage.is-panning { cursor: grabbing; }
.graph-viewer__stage svg { display: block; width: 100%; height: 100%; }
.graph-node { cursor: default; }
.graph-node__box { fill: #fff; stroke: var(--line-strong); stroke-width: 1; }
.graph-node__title { font-size: 13px; font-weight: 640; fill: var(--ink); }
.graph-node__text { font-size: 12px; fill: var(--muted); }
.graph-node__label { font-size: 12px; fill: var(--muted); }
.graph-node.is-unsupported .graph-node__box { stroke-dasharray: 5 4; stroke: var(--muted-soft); fill: #F7F7F9; }
.graph-node.is-selected .graph-node__box { stroke: var(--brand); stroke-width: 2; }
.graph-edge { fill: none; stroke: rgba(29, 29, 31, .38); stroke-width: 1.6; }
.graph-edge__label { font-size: 11px; fill: var(--muted); }
.graph-viewer__hint { position: absolute; left: 12px; bottom: 10px; padding: 5px 11px; border-radius: 999px; background: rgba(255, 255, 255, .9); border: 1px solid var(--line); color: var(--muted); font-size: 11.5px; }
.graph-viewer__zoom { position: absolute; right: 12px; top: 12px; display: flex; gap: 6px; }
.graph-viewer__zoom button { width: 30px; height: 30px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255, 255, 255, .94); cursor: pointer; font-size: 15px; line-height: 1; }
.graph-viewer__zoom button:hover { border-color: var(--brand); color: var(--brand-strong); }
.graph-viewer__copy { position: absolute; left: 12px; top: 12px; display: flex; gap: 6px; }
.graph-viewer__copy button { padding: 5px 11px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255, 255, 255, .94); font-size: 11.5px; cursor: pointer; }
.graph-viewer__copy button:hover { border-color: var(--brand); color: var(--brand-strong); }
.graph-viewer__notice { padding: 10px 14px; border-bottom: 1px solid var(--line); background: #FFF7E6; color: #8A5B00; font-size: 12.5px; }

/* ------------------------------------------------- 思维导图（上游引擎 iframe） */
/* 高度必须由宿主容器给定：上游引擎按容器尺寸初始化画布与自适应。 */
.mind-frame { display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; background: var(--bg-soft); }
.mind-frame__notice { padding: 8px 14px; border-bottom: 1px solid var(--line); background: #FFFDF5; color: var(--muted); font-size: 12px; line-height: 1.6; }
.mind-frame__notice.is-edited { background: #FFF3E6; color: #8A5B00; }
.mind-frame__stage { position: relative; height: max(380px, calc(100vh - 340px)); background: #fff; }
.mind-frame__iframe { display: block; width: 100%; height: 100%; border: 0; }

/* --------------------------------------------------------------- Toast */
.community-toast {
  position: fixed; left: 50%; bottom: 32px; z-index: 200; transform: translate(-50%, 12px);
  padding: 12px 22px; border-radius: 999px; background: rgba(29, 29, 31, .94); color: #fff;
  font-size: 14px; box-shadow: var(--shadow); opacity: 0; transition: opacity .22s, transform .22s;
}
.community-toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
.community-toast[hidden] { display: none; }

/* ------------------------------------------------------------- 响应式 */
@media (max-width: 1024px) {
  .community-landing__grid { grid-template-columns: 1fr; }
  .community__bar { top: 68px; }
  .community__layout { grid-template-columns: 1fr; }
  .community-side { position: static; }
  .community-side__nav { grid-auto-flow: column; grid-auto-columns: 1fr; }
  .community-side__nav a { text-align: center; }
}
@media (max-width: 900px) {
  .library__tree-toggle { display: inline-block; }
  /* 抽屉模式下不再有可拖的分隔条，由抽屉自己决定宽度。 */
  .library__resizer { display: none; }
  .library__tree {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 50; width: min(320px, 86vw);
    min-width: 0; max-width: none; padding: 18px 12px; background: #fff; border-right: 1px solid var(--line);
    transform: translateX(-102%); transition: transform .24s cubic-bezier(.16, 1, .3, 1); overflow-y: auto;
  }
  body.library-tree-open .library__tree { transform: none; }
  .library__reader { border-right: 0; }
  .library__content { padding: 18px 14px 32px; }
  .library__account-name { display: none; }
  .graph-viewer__stage { height: min(60vh, 560px); }
  .mind-frame__stage { height: min(62vh, 600px); }
}
@media (max-width: 620px) {
  .community__tabs { margin-inline-start: 0; }
  .library__brand strong { display: none; }
  .library__content { padding: 14px 12px 28px; }
  .library__toolbar { padding: 10px 12px; }
  .library-fileinfo dl { grid-template-columns: 1fr; gap: 4px 0; }
  .library-fileinfo dt { margin-top: 6px; }
}