diff --git a/apps/web/src/PropTooltip.tsx b/apps/web/src/PropTooltip.tsx
index 36d84a6..537dd8d 100644
--- a/apps/web/src/PropTooltip.tsx
+++ b/apps/web/src/PropTooltip.tsx
@@ -1,19 +1,68 @@
-/** Floating property detail tip (card view hover). */
+import { useLayoutEffect, useRef, useState } from "react";
+
+/** Floating property detail tip (card view hover / pinned for present). */
 
 export function PropTooltip({
   label,
   value,
   x,
   y,
+  pinned,
+  hostW,
+  hostH,
+  onUnpin,
 }: {
   label: string;
   value: string;
   x: number;
   y: number;
+  pinned?: boolean;
+  hostW: number;
+  hostH: number;
+  onUnpin?: () => void;
 }) {
+  const ref = useRef<HTMLDivElement>(null);
+  const [pos, setPos] = useState({ x, y });
+
+  useLayoutEffect(() => {
+    const el = ref.current;
+    if (!el) {
+      setPos({ x, y });
+      return;
+    }
+    const pad = 10;
+    const tw = el.offsetWidth;
+    const th = el.offsetHeight;
+    const maxX = Math.max(pad, hostW - pad - tw);
+    const maxY = Math.max(pad, hostH - pad - th);
+    setPos({
+      x: Math.min(maxX, Math.max(pad, x)),
+      y: Math.min(maxY, Math.max(pad, y)),
+    });
+  }, [x, y, label, value, hostW, hostH, pinned]);
+
   return (
-    <div className="prop-tooltip" style={{ left: x, top: y }} role="tooltip">
-      <div className="prop-tooltip__label">{label}</div>
+    <div
+      ref={ref}
+      className={`prop-tooltip${pinned ? " prop-tooltip--pinned" : ""}`}
+      style={{ left: pos.x, top: pos.y }}
+      role="tooltip"
+      onContextMenu={(e) => {
+        if (!pinned) return;
+        e.preventDefault();
+        e.stopPropagation();
+        onUnpin?.();
+      }}
+      onPointerDown={(e) => {
+        if (pinned) e.stopPropagation();
+      }}
+    >
+      <div className="prop-tooltip__label">
+        {label}
+        {pinned ? (
+          <span className="prop-tooltip__pin">钉住 · 右键释放</span>
+        ) : null}
+      </div>
       <div className="prop-tooltip__value">{value}</div>
     </div>
   );
diff --git a/apps/web/src/TopologyCanvas.tsx b/apps/web/src/TopologyCanvas.tsx
index 9d1c45a..acaf3e1 100644
--- a/apps/web/src/TopologyCanvas.tsx
+++ b/apps/web/src/TopologyCanvas.tsx
@@ -144,7 +144,12 @@ export function TopologyCanvas() {
     value: string;
     x: number;
     y: number;
+    pinned: boolean;
+    nodeId: string;
+    fieldKey: string;
   } | null>(null);
+  const propTipRef = useRef(propTip);
+  propTipRef.current = propTip;
   const [linkPreview, setLinkPreview] = useState<{
     fromId: string;
     x: number;
@@ -283,7 +288,60 @@ export function TopologyCanvas() {
       }
       return null;
     },
-    [nodes, posOf, dens],
+    [nodes, posOf, boxOf],
+  );
+
+  /** Resolve card property under pointer (hover tip / pin for讲解). */
+  const hitCardField = useCallback(
+    (
+      clientX: number,
+      clientY: number,
+      world: { x: number; y: number },
+    ): {
+      nodeId: string;
+      field: CardChipHit;
+      tipX: number;
+      tipY: number;
+    } | null => {
+      if (!cardView || viewport.zoom < 0.35) return null;
+      const hit = hitTest(world.x, world.y);
+      if (!hit || propEditId === hit) return null;
+      const n = nodes.find((x) => x.id === hit);
+      const p = n ? posOf(hit) : null;
+      if (!n || !p) return null;
+      const { w: bw, h: bh } = boxOf(n);
+      const localX = world.x - (p.x - bw / 2);
+      const localY = world.y - (p.y - bh / 2);
+      const fields = cardFieldHits(n, dens, expandedCardId === n.id);
+      const field = fields.find(
+        (f) =>
+          localX >= f.x &&
+          localX <= f.x + f.w &&
+          localY >= f.y &&
+          localY <= f.y + f.h,
+      );
+      if (!field) return null;
+      const host = hostRef.current?.getBoundingClientRect();
+      const tipX = host
+        ? clientX - host.left + 14
+        : hostSize.w / 2 + viewport.x + world.x * viewport.zoom + 14;
+      const tipY = host
+        ? clientY - host.top + 14
+        : hostSize.h / 2 + viewport.y + world.y * viewport.zoom + 14;
+      return { nodeId: hit, field, tipX, tipY };
+    },
+    [
+      cardView,
+      viewport,
+      hitTest,
+      propEditId,
+      nodes,
+      posOf,
+      boxOf,
+      dens,
+      expandedCardId,
+      hostSize,
+    ],
   );
 
   const worldBounds = useMemo(() => {
@@ -1246,49 +1304,22 @@ export function TopologyCanvas() {
           }
         }
 
-        // Idle hover: property tip in card view, node hover otherwise
+        // Idle hover: property tip in card view (skip while a tip is pinned)
         if (dragRef.current.mode === "none" && !ghost) {
           const hit = hitTest(world.x, world.y);
           setHoverId(hit);
-          if (cardView && hit && viewport.zoom >= 0.35 && propEditId !== hit) {
-            const n = nodes.find((x) => x.id === hit);
-            const p = n ? posOf(hit) : null;
-            if (n && p) {
-              const { w: bw, h: bh } = boxOf(n);
-              const localX = world.x - (p.x - bw / 2);
-              const localY = world.y - (p.y - bh / 2);
-              const fields = cardFieldHits(
-                n,
-                dens,
-                expandedCardId === n.id,
-              );
-              const field = fields.find(
-                (f: CardChipHit) =>
-                  localX >= f.x &&
-                  localX <= f.x + f.w &&
-                  localY >= f.y &&
-                  localY <= f.y + f.h,
-              );
-              if (field) {
-                const host = hostRef.current?.getBoundingClientRect();
-                const tipX = host
-                  ? e.clientX - host.left + 14
-                  : hostSize.w / 2 + viewport.x + world.x * viewport.zoom + 14;
-                const tipY = host
-                  ? e.clientY - host.top + 14
-                  : hostSize.h / 2 + viewport.y + world.y * viewport.zoom + 14;
-                setPropTip({
-                  label: field.label,
-                  value: field.fullValue,
-                  x: tipX,
-                  y: tipY,
-                });
-              } else {
-                setPropTip(null);
-              }
-            } else {
-              setPropTip(null);
-            }
+          if (propTipRef.current?.pinned) return;
+          const found = hitCardField(e.clientX, e.clientY, world);
+          if (found) {
+            setPropTip({
+              label: found.field.label,
+              value: found.field.fullValue,
+              x: found.tipX,
+              y: found.tipY,
+              pinned: false,
+              nodeId: found.nodeId,
+              fieldKey: found.field.key,
+            });
           } else {
             setPropTip(null);
           }
@@ -1373,13 +1404,30 @@ export function TopologyCanvas() {
         } else if (mode === "node" && fromId && !moved) {
           setSelection([fromId]);
           if (cardView) {
-            setExpandedCardId((prev) => (prev === fromId ? null : fromId));
-            if (propEditId && propEditId !== fromId) setPropEditId(null);
+            const found = hitCardField(e.clientX, e.clientY, world);
+            if (found) {
+              // Click property → pin tip for present /讲解
+              setExpandedCardId(fromId);
+              if (propEditId && propEditId !== fromId) setPropEditId(null);
+              setPropTip({
+                label: found.field.label,
+                value: found.field.fullValue,
+                x: found.tipX,
+                y: found.tipY,
+                pinned: true,
+                nodeId: found.nodeId,
+                fieldKey: found.field.key,
+              });
+            } else {
+              setExpandedCardId((prev) => (prev === fromId ? null : fromId));
+              if (propEditId && propEditId !== fromId) setPropEditId(null);
+            }
           }
         } else if (mode === "pan" && !moved) {
           setExpandedCardId(null);
           setPropEditId(null);
-          setPropTip(null);
+          // Keep pinned tip for讲解; only hover tip clears on blank click
+          setPropTip((t) => (t?.pinned ? t : null));
         }
 
         dragRef.current.mode = "none";
@@ -1392,7 +1440,14 @@ export function TopologyCanvas() {
         setDropForbidden(false);
         setDragCursor(null);
       }}
-      onContextMenu={(e) => e.preventDefault()}
+      onContextMenu={(e) => {
+        e.preventDefault();
+        // Right-click releases a pinned property tip
+        if (propTipRef.current?.pinned) {
+          setPropTip(null);
+          return;
+        }
+      }}
       onDoubleClick={(e) => {
         if (locked) return;
         const world = toWorld(e.clientX, e.clientY);
@@ -1783,6 +1838,10 @@ export function TopologyCanvas() {
           value={propTip.value}
           x={propTip.x}
           y={propTip.y}
+          pinned={propTip.pinned}
+          hostW={hostSize.w}
+          hostH={hostSize.h}
+          onUnpin={() => setPropTip(null)}
         />
       ) : null}
 
diff --git a/apps/web/src/canvas-ui-text.ts b/apps/web/src/canvas-ui-text.ts
index 20f0492..9269c99 100644
--- a/apps/web/src/canvas-ui-text.ts
+++ b/apps/web/src/canvas-ui-text.ts
@@ -77,7 +77,7 @@ const zh: CanvasUi = {
   card: "卡片",
   topology: "拓扑",
   bubbleTitle: "气泡视图：精简标题",
-  cardTitle: "卡片视图：单击展开全文 · 悬停属性看详情 · 双击编辑",
+  cardTitle: "卡片：单击属性钉住浮层 · 右键释放 · 双击编辑",
   topologyTitle: "拓扑视图：路由器图标 + 链路",
   unpin: "解钉",
   unpinTitle: "取消钉住：让选中节点重新参与自动布局",
@@ -127,7 +127,7 @@ const en: CanvasUi = {
   card: "Card",
   topology: "Topology",
   bubbleTitle: "Bubble view: title only",
-  cardTitle: "Card view: click expand · hover props · double-click edit",
+  cardTitle: "Card: click prop to pin tip · right-click unpin · double-click edit",
   topologyTitle: "Topology view: router icons + links",
   unpin: "Unpin",
   unpinTitle: "Unpin selected node for auto layout",
diff --git a/apps/web/src/node-props/NodePropEditor.tsx b/apps/web/src/node-props/NodePropEditor.tsx
index 6fbce70..ea3866a 100644
--- a/apps/web/src/node-props/NodePropEditor.tsx
+++ b/apps/web/src/node-props/NodePropEditor.tsx
@@ -24,6 +24,15 @@ type ApplyOps = (ops: Op[], summary?: string) => void | Promise<void>;
 
 type KvRow = { id: string; key: string; value: string };
 
+const OVERLAY_EDITOR_W = 440;
+
+function autoResizeTextarea(el: HTMLTextAreaElement | null) {
+  if (!el) return;
+  el.style.height = "auto";
+  const next = Math.min(320, Math.max(el.scrollHeight, 96));
+  el.style.height = `${next}px`;
+}
+
 function rowsFromDescription(
   description: Record<string, unknown> | null | undefined,
 ): KvRow[] {
@@ -160,6 +169,12 @@ export function NodePropEditor({
           ? ({ "--ns-brand": accent } as CSSProperties)
           : undefined
       }
+      onPointerDown={(e) => {
+        if (variant === "overlay") e.stopPropagation();
+      }}
+      onWheel={(e) => {
+        if (variant === "overlay") e.stopPropagation();
+      }}
     >
       <div
         className="ns-editor__header"
@@ -394,18 +409,24 @@ function DescriptionListEditor({
               }}
               onBlur={() => onCommit(descriptionFromRows(rowsRef.current))}
             />
-            <input
+            <textarea
               className="ns-kv__val"
               value={row.value}
               placeholder="内容"
               aria-label="属性值"
+              rows={Math.min(10, Math.max(3, Math.ceil(row.value.length / 36)))}
               onChange={(e) => {
                 const value = e.target.value;
                 setRows((prev) =>
                   prev.map((r) => (r.id === row.id ? { ...r, value } : r)),
                 );
+                autoResizeTextarea(e.target);
               }}
+              onFocus={(e) => autoResizeTextarea(e.target)}
               onBlur={() => onCommit(descriptionFromRows(rowsRef.current))}
+              ref={(el) => {
+                if (el) autoResizeTextarea(el);
+              }}
             />
             <button
               type="button"
@@ -525,10 +546,22 @@ function FieldRow({
         {def.kind === "textarea" || def.kind === "links" ? (
           <textarea
             key={`${def.id}-${node.id}-${node.version}`}
+            className={
+              def.id === "note" || seed.length > 80 ? "ns-textarea--lg" : undefined
+            }
             defaultValue={seed}
-            rows={def.kind === "links" ? 3 : 2}
+            rows={
+              def.kind === "links"
+                ? Math.min(8, Math.max(3, seed.split("\n").length + 1))
+                : Math.min(12, Math.max(5, Math.ceil(seed.length / 40)))
+            }
             placeholder={def.kind === "links" ? "标题|url 每行一条" : ""}
+            onFocus={(e) => autoResizeTextarea(e.target)}
+            onInput={(e) => autoResizeTextarea(e.currentTarget)}
             onBlur={(e) => onCommit(e.target.value)}
+            ref={(el) => {
+              if (el) autoResizeTextarea(el);
+            }}
           />
         ) : def.kind === "datetime" ? (
           <input
@@ -575,9 +608,9 @@ export function NodePropOverlay({
   applyOps,
   screenX,
   screenY,
-  zoom,
+  zoom: _zoom,
   accent,
-  width,
+  width: _width,
   showStylePreset,
 }: {
   node: MindNode;
@@ -589,14 +622,16 @@ export function NodePropOverlay({
   width: number;
   showStylePreset?: boolean;
 }) {
+  // Keep editor at screen size (ignore canvas zoom / card width) so long text is editable.
+  const panelW = OVERLAY_EDITOR_W;
   return (
     <div
-      className="ns-overlay"
+      className="ns-overlay ns-overlay--roomy"
       style={{
         left: screenX,
         top: screenY,
-        width,
-        transform: `translate(-50%, -50%) scale(${zoom})`,
+        width: panelW,
+        transform: "translate(-50%, -50%)",
       }}
     >
       <NodePropEditor
diff --git a/apps/web/src/node-props/node-shell.css b/apps/web/src/node-props/node-shell.css
index b448257..fbb600b 100644
--- a/apps/web/src/node-props/node-shell.css
+++ b/apps/web/src/node-props/node-shell.css
@@ -18,7 +18,7 @@
   background: var(--ns-bg);
   border: 1px solid var(--ns-border);
   border-radius: 16px;
-  overflow: visible;
+  overflow: hidden;
   backdrop-filter: blur(18px) saturate(1.15);
   -webkit-backdrop-filter: blur(18px) saturate(1.15);
   box-shadow:
@@ -28,17 +28,21 @@
   font-family: var(--ns-font);
   font-size: 12.5px;
   line-height: 1.45;
-  min-width: 248px;
-  max-width: 320px;
+  min-width: 360px;
+  width: 100%;
+  max-width: 480px;
+  max-height: min(72vh, 640px);
 }
 
 .ns-editor--panel {
   box-shadow: none;
   max-width: none;
+  max-height: none;
   width: 100%;
   background: transparent;
   border: none;
   border-radius: 0;
+  overflow: visible;
   backdrop-filter: none;
   -webkit-backdrop-filter: none;
 }
@@ -97,6 +101,10 @@
   flex-direction: column;
   gap: 2px;
   padding: 8px 10px 10px;
+  overflow-x: hidden;
+  overflow-y: auto;
+  flex: 1 1 auto;
+  min-height: 0;
 }
 
 .ns-meta-chips {
@@ -169,9 +177,9 @@
 
 .ns-kv__row {
   display: grid;
-  grid-template-columns: minmax(64px, 0.34fr) 1fr auto;
+  grid-template-columns: minmax(72px, 0.28fr) 1fr auto;
   gap: 6px;
-  align-items: center;
+  align-items: start;
   padding: 2px 0;
   border-top: none;
 }
@@ -189,12 +197,20 @@
   background: var(--ns-input);
   color: var(--ns-text);
   font-family: inherit;
-  font-size: 12px;
+  font-size: 12.5px;
+  line-height: 1.45;
   border-radius: 8px;
-  padding: 6px 8px;
+  padding: 8px 10px;
   outline: none;
 }
 
+.ns-kv__val {
+  resize: vertical;
+  min-height: 72px;
+  max-height: 240px;
+  field-sizing: content;
+}
+
 .ns-kv__key {
   color: var(--ns-label);
   font-weight: 500;
@@ -214,6 +230,8 @@
   border-radius: 6px;
   cursor: pointer;
   opacity: 0.7;
+  margin-top: 6px;
+  align-self: start;
 }
 
 .ns-kv__del:hover {
@@ -345,14 +363,25 @@
   color: var(--ns-text);
   font-family: inherit;
   font-size: 12.5px;
+  line-height: 1.45;
   border-radius: 8px;
-  padding: 7px 10px;
+  padding: 8px 10px;
   outline: none;
   resize: vertical;
   transition: border-color 0.12s ease, background 0.12s ease;
   color-scheme: dark;
 }
 
+.ns-row__ctrl textarea {
+  min-height: 96px;
+  max-height: 320px;
+  field-sizing: content;
+}
+
+.ns-row__ctrl textarea.ns-textarea--lg {
+  min-height: 140px;
+}
+
 .ns-row__ctrl select option {
   color: #f4f5f7;
   background: #1b1e28;
@@ -518,8 +547,13 @@
   transform-origin: center center;
 }
 
+.ns-overlay--roomy {
+  /* Editor stays screen-readable; do not shrink with canvas zoom. */
+  width: min(480px, calc(100vw - 48px));
+}
+
 .ns-editor {
-  pointer-events: none;
+  pointer-events: auto;
 }
 
 .ns-editor--panel {
diff --git a/apps/web/src/styles.css b/apps/web/src/styles.css
index 5b8dc8f..3c50686 100644
--- a/apps/web/src/styles.css
+++ b/apps/web/src/styles.css
@@ -509,7 +509,7 @@ input {
 .prop-tooltip {
   position: absolute;
   z-index: 8;
-  max-width: 320px;
+  max-width: min(360px, calc(100% - 20px));
   min-width: 140px;
   padding: 10px 12px;
   border-radius: 12px;
@@ -528,12 +528,39 @@ input {
     "Noto Sans SC", system-ui, sans-serif;
 }
 
+.prop-tooltip--pinned {
+  pointer-events: auto;
+  z-index: 12;
+  border-color: color-mix(
+    in srgb,
+    var(--dsw-alias-brand-primary, #5e6ad2) 55%,
+    rgba(255, 255, 255, 0.2)
+  );
+  box-shadow:
+    0 1px 0 rgba(255, 255, 255, 0.06) inset,
+    0 0 0 1px color-mix(in srgb, var(--dsw-alias-brand-primary, #5e6ad2) 35%, transparent),
+    0 16px 44px rgba(0, 0, 0, 0.52);
+}
+
 .prop-tooltip__label {
   font-size: 11px;
   font-weight: 600;
   letter-spacing: 0.02em;
   color: var(--dsw-alias-label-secondary, #a5adb8);
   margin-bottom: 4px;
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 10px;
+}
+
+.prop-tooltip__pin {
+  font-size: 10px;
+  font-weight: 500;
+  letter-spacing: 0;
+  color: var(--dsw-alias-brand-primary, #5e6ad2);
+  white-space: nowrap;
+  opacity: 0.92;
 }
 
 .prop-tooltip__value {
@@ -543,6 +570,8 @@ input {
   color: var(--dsw-alias-label-primary, #f4f5f7);
   white-space: pre-wrap;
   word-break: break-word;
+  max-height: min(40vh, 280px);
+  overflow: auto;
 }
 
 .edit-overlay {