diff --git a/app/(main)/post/[id]/page.tsx b/app/(main)/post/[id]/page.tsx
index cf4bdaa..251041d 100644
--- a/app/(main)/post/[id]/page.tsx
+++ b/app/(main)/post/[id]/page.tsx
@@ -1,27 +1,24 @@
-import { ArrowLeft, Heart, MessageCircle, Pin, Star } from "lucide-react"
+import { ArrowLeft, MessageCircle, Pin, Star } from "lucide-react"
 import Image from "next/image"
 import Link from "next/link"
 import { notFound } from "next/navigation"
 import { PostComments } from "@/components/post-comments"
+import { PostLikeButton } from "@/components/post-like-button"
 import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
 import { Badge } from "@/components/ui/badge"
 import { Card, CardContent, CardHeader } from "@/components/ui/card"
 import { Separator } from "@/components/ui/separator"
+import { getOrderById, getPlayerById, getPostById, listCommentsByPost } from "@/lib/api"
 import { roleLabels } from "@/lib/constants"
-import { mockComments, mockOrders, mockPlayers, mockPosts } from "@/lib/mock"
 
 export default async function PostDetailPage({ params }: { params: Promise<{ id: string }> }) {
   const { id } = await params
-  const post = mockPosts.find((p) => p.id === id)
+  const post = getPostById(id)
   if (!post) notFound()
 
-  const comments = mockComments.filter((c) => c.postId === id)
-  const linkedOrder = post.linkedOrderId
-    ? mockOrders.find((o) => o.id === post.linkedOrderId)
-    : null
-  const linkedPlayer = linkedOrder
-    ? mockPlayers.find((player) => player.id === linkedOrder.playerId)
-    : null
+  const comments = listCommentsByPost(id)
+  const linkedOrder = post.linkedOrderId ? getOrderById(post.linkedOrderId) : null
+  const linkedPlayer = linkedOrder ? getPlayerById(linkedOrder.playerId) : null
 
   return (
     <div className="container mx-auto py-8 px-4 max-w-2xl">
@@ -94,13 +91,7 @@ export default async function PostDetailPage({ params }: { params: Promise<{ id:
           )}
 
           <div className="flex items-center gap-4 text-sm text-muted-foreground pt-2">
-            <button
-              type="button"
-              className="flex items-center gap-1 hover:text-foreground transition-colors"
-            >
-              <Heart className={`h-4 w-4 ${post.liked ? "fill-red-500 text-red-500" : ""}`} />
-              {post.likeCount}
-            </button>
+            <PostLikeButton initialLiked={post.liked} initialCount={post.likeCount} />
             <span className="flex items-center gap-1">
               <MessageCircle className="h-4 w-4" />
               {post.commentCount}
diff --git a/app/(main)/post/new/page.tsx b/app/(main)/post/new/page.tsx
index 468f59f..7322b6a 100644
--- a/app/(main)/post/new/page.tsx
+++ b/app/(main)/post/new/page.tsx
@@ -20,10 +20,10 @@ import {
   SelectValue,
 } from "@/components/ui/select"
 import { Textarea } from "@/components/ui/textarea"
-import { mockPosts } from "@/lib/mock"
 import { useRequireAuth } from "@/lib/use-require-auth"
 import { useAuthStore } from "@/store/auth"
 import { useOrderStore } from "@/store/orders"
+import { usePostStore } from "@/store/posts"
 
 const postSchema = z.object({
   title: z.string().min(2, "标题至少2个字符").max(50, "标题最多50个字符"),
@@ -37,7 +37,10 @@ export default function NewPostPage() {
   const { isAuthenticated, requireAuth } = useRequireAuth()
   const currentRole = useAuthStore((state) => state.currentRole)
   const userId = useAuthStore((state) => state.user?.id)
+  const user = useAuthStore((state) => state.user)
   const orders = useOrderStore((state) => state.orders)
+  const posts = usePostStore((state) => state.posts)
+  const createPost = usePostStore((state) => state.createPost)
   const [postType, setPostType] = useState("normal")
   const [selectedTags, setSelectedTags] = useState<string[]>([])
   const [imageCount, setImageCount] = useState(0)
@@ -48,7 +51,7 @@ export default function NewPostPage() {
     register,
     handleSubmit,
     formState: { errors, isSubmitting },
-  } = useForm({
+  } = useForm<z.infer<typeof postSchema>>({
     resolver: standardSchemaResolver(postSchema),
   })
 
@@ -68,14 +71,28 @@ export default function NewPostPage() {
     (order) => order.status === "completed" && order.consumerId === userId,
   )
 
-  const onSubmit = async () => {
+  const onSubmit = async (data: z.infer<typeof postSchema>) => {
     if (!isAuthenticated) {
       requireAuth(() => undefined)
       return
     }
 
-    await new Promise((r) => setTimeout(r, 500))
-    router.push("/community")
+    requireAuth(() => {
+      if (!user) return
+
+      createPost({
+        author: user,
+        authorRole: currentRole,
+        title: data.title,
+        content: data.content,
+        images: Array.from({ length: imageCount }).map(() => "/posts/p1-1.jpg"),
+        tags: selectedTags,
+        linkedOrderId: postType === "show_order" ? selectedOrderId : undefined,
+        quotedPostId: postType === "quote" ? selectedQuotePostId : undefined,
+      })
+
+      router.push("/community")
+    })
   }
 
   return (
@@ -134,7 +151,7 @@ export default function NewPostPage() {
                     <SelectValue placeholder="选择要引用的帖子" />
                   </SelectTrigger>
                   <SelectContent>
-                    {mockPosts.map((post) => (
+                    {posts.map((post) => (
                       <SelectItem key={post.id} value={post.id}>
                         {post.title}
                       </SelectItem>
@@ -145,7 +162,7 @@ export default function NewPostPage() {
                   <p className="font-medium text-foreground">预览：</p>
                   {selectedQuotePostId ? (
                     (() => {
-                      const post = mockPosts.find((p) => p.id === selectedQuotePostId)
+                      const post = posts.find((p) => p.id === selectedQuotePostId)
                       if (!post) return <p className="mt-1">未找到帖子</p>
                       return (
                         <div className="mt-2 rounded border bg-background p-3">
diff --git a/components/post-comments.tsx b/components/post-comments.tsx
index 29c64e3..e579d16 100644
--- a/components/post-comments.tsx
+++ b/components/post-comments.tsx
@@ -83,6 +83,23 @@ export function PostComments({ initialComments, postId }: PostCommentsProps) {
                 <button
                   type="button"
                   className="flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground mt-1 transition-colors"
+                  onClick={() =>
+                    requireAuth(() => {
+                      setComments((prev) =>
+                        prev.map((item) => {
+                          if (item.id !== comment.id) return item
+                          const nextLiked = !item.liked
+                          return {
+                            ...item,
+                            liked: nextLiked,
+                            likeCount: nextLiked
+                              ? item.likeCount + 1
+                              : Math.max(0, item.likeCount - 1),
+                          }
+                        }),
+                      )
+                    })
+                  }
                 >
                   <Heart
                     className={`h-3 w-3 ${comment.liked ? "fill-red-500 text-red-500" : ""}`}
diff --git a/components/post-like-button.tsx b/components/post-like-button.tsx
new file mode 100644
index 0000000..2d7a4d4
--- /dev/null
+++ b/components/post-like-button.tsx
@@ -0,0 +1,35 @@
+"use client"
+
+import { Heart } from "lucide-react"
+import { useState } from "react"
+import { useRequireAuth } from "@/lib/use-require-auth"
+
+interface PostLikeButtonProps {
+  initialLiked: boolean
+  initialCount: number
+}
+
+export function PostLikeButton({ initialLiked, initialCount }: PostLikeButtonProps) {
+  const { requireAuth } = useRequireAuth()
+  const [liked, setLiked] = useState(initialLiked)
+  const [count, setCount] = useState(initialCount)
+
+  return (
+    <button
+      type="button"
+      className="flex items-center gap-1 hover:text-foreground transition-colors"
+      onClick={() =>
+        requireAuth(() => {
+          setLiked((prevLiked) => {
+            const nextLiked = !prevLiked
+            setCount((prevCount) => (nextLiked ? prevCount + 1 : Math.max(0, prevCount - 1)))
+            return nextLiked
+          })
+        })
+      }
+    >
+      <Heart className={`h-4 w-4 ${liked ? "fill-red-500 text-red-500" : ""}`} />
+      {count}
+    </button>
+  )
+}
diff --git a/lib/api/posts.ts b/lib/api/posts.ts
index 3a8154a..7319158 100644
--- a/lib/api/posts.ts
+++ b/lib/api/posts.ts
@@ -1,13 +1,13 @@
-import { mockPosts } from "@/lib/mock"
+import { usePostStore } from "@/store/posts"
 
 export function listPosts() {
-  return mockPosts
+  return usePostStore.getState().posts
 }
 
 export function getPostById(postId: string) {
-  return mockPosts.find((post) => post.id === postId)
+  return usePostStore.getState().posts.find((post) => post.id === postId)
 }
 
 export function listPostsByAuthor(userId: string) {
-  return mockPosts.filter((post) => post.author.id === userId)
+  return usePostStore.getState().posts.filter((post) => post.author.id === userId)
 }
diff --git a/store/posts.ts b/store/posts.ts
new file mode 100644
index 0000000..c1357a1
--- /dev/null
+++ b/store/posts.ts
@@ -0,0 +1,48 @@
+import { create } from "zustand"
+import { generateId } from "@/lib/id"
+import { mockPosts } from "@/lib/mock"
+import type { Post, User, UserRole } from "@/lib/types"
+
+interface CreatePostInput {
+  author: User
+  authorRole: UserRole
+  title: string
+  content: string
+  images: string[]
+  tags: string[]
+  linkedOrderId?: string
+  quotedPostId?: string
+}
+
+interface PostState {
+  posts: Post[]
+  createPost: (input: CreatePostInput) => Post
+}
+
+export const usePostStore = create<PostState>((set) => ({
+  posts: mockPosts,
+  createPost: (input) => {
+    const post: Post = {
+      id: generateId("post"),
+      author: input.author,
+      authorRole: input.authorRole,
+      title: input.title.trim(),
+      content: input.content.trim(),
+      images: input.images,
+      tags: input.tags,
+      linkedOrderId: input.linkedOrderId,
+      quotedPostId: input.quotedPostId,
+      likeCount: 0,
+      commentCount: 0,
+      liked: false,
+      pinned: false,
+      createdAt: new Date().toISOString(),
+    }
+
+    set((state) => ({
+      posts: [post, ...state.posts],
+    }))
+
+    return post
+  },
+}))