diff --git a/application/admin/view/index/login.html b/application/admin/view/index/login.html
index 9e700f2..9da0e94 100755
--- a/application/admin/view/index/login.html
+++ b/application/admin/view/index/login.html
@@ -2,7 +2,7 @@
 <html lang="zh-cn">
 <head>
     {include file="common/meta" /}
-    <title>田间小仓 · 同城分类信息平台 — 后台登录</title>
+    <title>山间小仓 · 同城分类信息平台 — 后台登录</title>
     <style type="text/css">
         :root {
             --brand: #0e7c66;
@@ -69,14 +69,13 @@
 
         .brand-top { display: flex; align-items: center; gap: 14px; }
 
+        /* 品牌 LOGO：圆形徽标 / 圆外透明（assets/img/brand-logo.png） */
         .brand-mark {
+            display: block;
             width: 52px; height: 52px;
-            border-radius: 15px;
-            display: flex; align-items: center; justify-content: center;
-            background: linear-gradient(140deg, #ffffff 0%, #e9fff8 100%);
+            border-radius: 50%;
             box-shadow: 0 12px 26px -10px rgba(0, 0, 0, .5);
         }
-        .brand-mark svg { width: 30px; height: 30px; display: block; }
 
         .brand-word { line-height: 1.15; }
         .brand-word b { display: block; font-size: 22px; font-weight: 700; letter-spacing: 3px; }
@@ -278,13 +277,11 @@
                 margin-bottom: 24px;
             }
             .mobile-brand .mk {
+                display: block;
                 width: 46px; height: 46px;
-                border-radius: 13px;
-                display: flex; align-items: center; justify-content: center;
-                background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
-                box-shadow: 0 10px 20px -10px rgba(14, 124, 102, .9);
+                border-radius: 50%;
+                box-shadow: 0 10px 20px -10px rgba(14, 124, 102, .55);
             }
-            .mobile-brand .mk svg { width: 26px; height: 26px; }
             .mobile-brand b { font-size: 19px; letter-spacing: 2px; color: var(--ink); }
             .mobile-brand span { display: block; font-size: 11px; letter-spacing: 2px; color: var(--muted); margin-top: 3px; }
         }
@@ -309,22 +306,16 @@
     <aside class="brand-panel">
         <div class="brand-inner">
             <div class="brand-top">
-                <div class="brand-mark">
-                    <svg viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
-                        <path d="M5.5 13.6 16 5.8l10.5 7.8" stroke="#0e7c66" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
-                        <path d="M8.2 13v12.4h15.6V13" stroke="#0e7c66" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
-                        <path d="M13.4 25.4v-6.6h5.2v6.6" stroke="#0e7c66" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
-                    </svg>
-                </div>
+                <img class="brand-mark" src="__CDN__/assets/img/brand-logo.png" alt="山间小仓" width="52" height="52">
                 <div class="brand-word">
-                    <b>田间小仓</b>
-                    <span>TIANJIAN XIAOCANG</span>
+                    <b>山间小仓</b>
+                    <span>SHANJIAN XIAOCANG</span>
                 </div>
             </div>
 
             <div class="brand-hero">
                 <h1>同城分类<em>信息平台</em></h1>
-                <p>一城一站，让同城的每一份需求与供给更快相遇。分类信息发布、同城商家服务、社区生活互助，尽在田间小仓。</p>
+                <p>一城一站，让同城的每一份需求与供给更快相遇。分类信息发布、同城商家服务、社区生活互助，尽在山间小仓。</p>
                 <ul class="brand-points">
                     <li>
                         <span class="ic"><svg viewBox="0 0 24 24" fill="none"><path d="M8 6h11M8 12h11M8 18h11M4 6h.01M4 12h.01M4 18h.01" stroke="#ffffff" stroke-width="1.9" stroke-linecap="round"/></svg></span>
@@ -341,7 +332,7 @@
                 </ul>
             </div>
 
-            <div class="brand-foot">© {:date('Y')} 田间小仓同城分类信息平台 · 保留所有权利</div>
+            <div class="brand-foot">© {:date('Y')} 山间小仓同城分类信息平台 · 保留所有权利</div>
         </div>
     </aside>
 
@@ -349,21 +340,15 @@
     <main class="form-panel">
         <div class="login-card">
             <div class="mobile-brand">
-                <span class="mk">
-                    <svg viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
-                        <path d="M5.5 13.6 16 5.8l10.5 7.8" stroke="#ffffff" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
-                        <path d="M8.2 13v12.4h15.6V13" stroke="#ffffff" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
-                        <path d="M13.4 25.4v-6.6h5.2v6.6" stroke="#ffffff" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/>
-                    </svg>
-                </span>
+                <img class="mk" src="__CDN__/assets/img/brand-logo.png" alt="山间小仓" width="46" height="46">
                 <span>
-                    <b>田间小仓</b>
+                    <b>山间小仓</b>
                     <span>同城分类信息平台</span>
                 </span>
             </div>
 
             <h2 class="form-title">欢迎回来</h2>
-            <p class="form-sub">登录「田间小仓同城分类信息平台」后台管理系统</p>
+            <p class="form-sub">登录「山间小仓同城分类信息平台」后台管理系统</p>
 
             <form action="" method="post" id="login-form">
                 <!--@AdminLoginFormBegin-->
@@ -405,7 +390,7 @@
                 <!--@AdminLoginFormEnd-->
             </form>
 
-            <div class="form-foot">© {:date('Y')} 田间小仓同城分类信息平台</div>
+            <div class="form-foot">© {:date('Y')} 山间小仓同城分类信息平台</div>
         </div>
     </main>
 </div>
diff --git a/public/assets/img/brand-logo.png b/public/assets/img/brand-logo.png
new file mode 100644
index 0000000..d2e17cf
Binary files /dev/null and b/public/assets/img/brand-logo.png differ
diff --git a/tools/gen-brand-logo.mjs b/tools/gen-brand-logo.mjs
new file mode 100644
index 0000000..cfa12b9
--- /dev/null
+++ b/tools/gen-brand-logo.mjs
@@ -0,0 +1,375 @@
+#!/usr/bin/env node
+/**
+ * 品牌 LOGO 生成器（后台登录页用）
+ * ------------------------------------------------------------
+ * 输入：一张「圆形徽标 + 品牌文字」的方形品牌图（豆包 AI 生成的那种）
+ * 输出：public/assets/img/brand-logo.png —— 只保留顶部圆形徽标，
+ *       圆外像素置为完全透明（边缘按 alpha 平滑过渡），供登录页品牌位使用。
+ *
+ * 算法（为什么这样做）：
+ *   1) 先取左上角小块均值作为「背景参考色」（源图是米白底、不是纯白，不能用 rgb>=250 判白），
+ *      再逐行扫描「与背景色距 > 阈值」的内容像素，取**第一条连续内容行带** —— 它就是最上方的
+ *      圆形徽标，因此徽标下方的品牌文字（含旧站名）与右下角的 AI 水印天然被排除；
+ *   2) 以该行带的包围盒求出圆心 / 半径，按圆生成 alpha 蒙版（1px 抗锯齿）；
+ *   3) 用「按 alpha 预乘的面积平均」重采样到目标尺寸，得到无底噪的透明 PNG。
+ *
+ * 用法：
+ *   node tools/gen-brand-logo.mjs [源图] [--preview 输出图]
+ *     [源图]          默认 ~/Desktop/山间小仓.png（源图不入库，只提交生成结果）
+ *     --preview 路径   额外输出一张「深绿底 / 白底 × 52px / 140px」的合成校验图
+ *
+ * 说明：脚本零依赖（仅 node 内置模块），PNG 编解码为 8bit / RGB / RGBA。
+ */
+import fs from 'node:fs'
+import os from 'node:os'
+import path from 'node:path'
+import url from 'node:url'
+import zlib from 'node:zlib'
+
+const ROOT = path.resolve(path.dirname(url.fileURLToPath(import.meta.url)), '..')
+
+/* ------------------------------------------------------------------ *
+ * 最小 PNG 编解码（8bit：灰度 / 真彩 / 带 alpha）
+ * ------------------------------------------------------------------ */
+const SIG = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])
+
+let CRC_TABLE = null
+function crcTable() {
+  if (CRC_TABLE) return CRC_TABLE
+  CRC_TABLE = new Int32Array(256)
+  for (let n = 0; n < 256; n++) {
+    let c = n
+    for (let k = 0; k < 8; k++) c = c & 1 ? 0xedb88320 ^ (c >>> 1) : c >>> 1
+    CRC_TABLE[n] = c
+  }
+  return CRC_TABLE
+}
+
+function crc32(buf) {
+  const t = crcTable()
+  let c = 0xffffffff
+  for (let i = 0; i < buf.length; i++) c = t[(c ^ buf[i]) & 0xff] ^ (c >>> 8)
+  return (c ^ 0xffffffff) >>> 0
+}
+
+function chunk(type, data) {
+  const len = Buffer.alloc(4)
+  len.writeUInt32BE(data.length, 0)
+  const typeBuf = Buffer.from(type, 'ascii')
+  const crc = Buffer.alloc(4)
+  crc.writeUInt32BE(crc32(Buffer.concat([typeBuf, data])), 0)
+  return Buffer.concat([len, typeBuf, data, crc])
+}
+
+/** 解码 PNG -> { width, height, rgba } */
+function decodePng(buf) {
+  if (!buf.slice(0, 8).equals(SIG)) throw new Error('不是有效的 PNG')
+  let off = 8
+  let width = 0
+  let height = 0
+  let colorType = 0
+  let bitDepth = 0
+  const idat = []
+  while (off < buf.length) {
+    const len = buf.readUInt32BE(off)
+    const type = buf.toString('ascii', off + 4, off + 8)
+    const data = buf.slice(off + 8, off + 8 + len)
+    if (type === 'IHDR') {
+      width = data.readUInt32BE(0)
+      height = data.readUInt32BE(4)
+      bitDepth = data[8]
+      colorType = data[9]
+    } else if (type === 'IDAT') idat.push(data)
+    else if (type === 'IEND') break
+    off += 12 + len
+  }
+  if (bitDepth !== 8) throw new Error('仅支持 8bit PNG')
+  const ch = colorType === 6 ? 4 : colorType === 2 ? 3 : colorType === 4 ? 2 : 1
+  const raw = zlib.inflateSync(Buffer.concat(idat))
+  const stride = width * ch
+  const rgba = Buffer.alloc(width * height * 4)
+  let prev = Buffer.alloc(stride)
+  for (let y = 0; y < height; y++) {
+    const ft = raw[y * (stride + 1)]
+    const line = Buffer.from(raw.slice(y * (stride + 1) + 1, y * (stride + 1) + 1 + stride))
+    for (let i = 0; i < stride; i++) {
+      const a = i >= ch ? line[i - ch] : 0
+      const b = prev[i]
+      const c = i >= ch ? prev[i - ch] : 0
+      if (ft === 1) line[i] = (line[i] + a) & 255
+      else if (ft === 2) line[i] = (line[i] + b) & 255
+      else if (ft === 3) line[i] = (line[i] + ((a + b) >> 1)) & 255
+      else if (ft === 4) {
+        const p = a + b - c
+        const pa = Math.abs(p - a)
+        const pb = Math.abs(p - b)
+        const pc = Math.abs(p - c)
+        line[i] = (line[i] + (pa <= pb && pa <= pc ? a : pb <= pc ? b : c)) & 255
+      }
+    }
+    for (let x = 0; x < width; x++) {
+      const si = x * ch
+      const di = (y * width + x) * 4
+      if (ch === 4) {
+        rgba[di] = line[si]; rgba[di + 1] = line[si + 1]; rgba[di + 2] = line[si + 2]; rgba[di + 3] = line[si + 3]
+      } else if (ch === 3) {
+        rgba[di] = line[si]; rgba[di + 1] = line[si + 1]; rgba[di + 2] = line[si + 2]; rgba[di + 3] = 255
+      } else {
+        rgba[di] = rgba[di + 1] = rgba[di + 2] = line[si]; rgba[di + 3] = ch === 2 ? line[si + 1] : 255
+      }
+    }
+    prev = line
+  }
+  return { width, height, rgba }
+}
+
+/** 编码 RGBA -> PNG（filter 0） */
+function encodePng({ width, height, rgba }) {
+  const stride = width * 4
+  const raw = Buffer.alloc((stride + 1) * height)
+  for (let y = 0; y < height; y++) {
+    raw[y * (stride + 1)] = 0
+    rgba.copy(raw, y * (stride + 1) + 1, y * stride, y * stride + stride)
+  }
+  const ihdr = Buffer.alloc(13)
+  ihdr.writeUInt32BE(width, 0)
+  ihdr.writeUInt32BE(height, 4)
+  ihdr[8] = 8
+  ihdr[9] = 6
+  return Buffer.concat([
+    SIG,
+    chunk('IHDR', ihdr),
+    chunk('IDAT', zlib.deflateSync(raw, { level: 9 })),
+    chunk('IEND', Buffer.alloc(0)),
+  ])
+}
+
+/**
+ * 任意尺寸重采样（按 alpha 预乘的面积平均）
+ * 比整数倍降采样更通用：可以一次到位输出 256 / 140 / 52 等任意边长。
+ */
+function resize(img, w, h) {
+  const out = Buffer.alloc(w * h * 4)
+  const sx = img.width / w
+  const sy = img.height / h
+  for (let y = 0; y < h; y++) {
+    const y0 = Math.floor(y * sy)
+    const y1 = Math.max(y0 + 1, Math.min(img.height, Math.ceil((y + 1) * sy)))
+    for (let x = 0; x < w; x++) {
+      const x0 = Math.floor(x * sx)
+      const x1 = Math.max(x0 + 1, Math.min(img.width, Math.ceil((x + 1) * sx)))
+      let r = 0
+      let g = 0
+      let b = 0
+      let a = 0
+      let n = 0
+      for (let yy = y0; yy < y1; yy++) {
+        for (let xx = x0; xx < x1; xx++) {
+          const d = (yy * img.width + xx) * 4
+          const al = img.rgba[d + 3]
+          r += img.rgba[d] * al
+          g += img.rgba[d + 1] * al
+          b += img.rgba[d + 2] * al
+          a += al
+          n++
+        }
+      }
+      const o = (y * w + x) * 4
+      if (a === 0) {
+        out[o] = out[o + 1] = out[o + 2] = out[o + 3] = 0
+        continue
+      }
+      out[o] = Math.round(r / a)
+      out[o + 1] = Math.round(g / a)
+      out[o + 2] = Math.round(b / a)
+      out[o + 3] = Math.round(a / n)
+    }
+  }
+  return { width: w, height: h, rgba: out }
+}
+
+/* ------------------------------------------------------------------ *
+ * 主流程
+ * ------------------------------------------------------------------ */
+const argv = process.argv.slice(2)
+const previewIdx = argv.indexOf('--preview')
+const previewPath = previewIdx >= 0 ? argv[previewIdx + 1] : ''
+const srcArg = argv.find((a) => !a.startsWith('--') && a !== previewPath)
+const SRC = srcArg ? path.resolve(srcArg) : path.join(os.homedir(), 'Desktop', '山间小仓.png')
+const OUT = path.join(ROOT, 'public', 'assets', 'img', 'brand-logo.png')
+const SIZE = 256 // 产物边长（登录页最大显示 140px，256 足够 2x 高清）
+const MARGIN = 10 // 圆形徽标与画布边缘的留白（源图分辨率下）
+
+if (!fs.existsSync(SRC)) {
+  console.error(`❌ 源图不存在：${SRC}`)
+  process.exit(1)
+}
+
+const src = decodePng(fs.readFileSync(SRC))
+const W = src.width
+const H = src.height
+const rgba = src.rgba
+
+/** 背景参考色：取左上角小块均值（源图四周是米白底，水印在右下角，不会污染这里） */
+const bgRgb = (() => {
+  let r = 0
+  let g = 0
+  let b = 0
+  let n = 0
+  for (let y = 2; y < 8; y++) {
+    for (let x = 2; x < 8; x++) {
+      const d = (y * W + x) * 4
+      r += rgba[d]
+      g += rgba[d + 1]
+      b += rgba[d + 2]
+      n++
+    }
+  }
+  return [r / n, g / n, b / n]
+})()
+
+/**
+ * 该像素是否「有内容」
+ * 注意：源图不是纯白底而是米白底（如 250,246,234），
+ * 因此不能用 rgb>=250 判定白底，必须与背景参考色比较色距。
+ */
+const BG_TOL = 18
+function isInk(x, y) {
+  const d = (y * W + x) * 4
+  const dr = rgba[d] - bgRgb[0]
+  const dg = rgba[d + 1] - bgRgb[1]
+  const db = rgba[d + 2] - bgRgb[2]
+  return Math.sqrt(dr * dr + dg * dg + db * db) > BG_TOL
+}
+
+// 1) 逐行找连续非白行带：第一条即顶部圆形徽标（天然排除下方文字与右下角水印）
+const GAP = 8
+const bands = []
+let cur = null
+let whiteRun = 0
+for (let y = 0; y < H; y++) {
+  let ink = false
+  for (let x = 0; x < W; x++) {
+    if (isInk(x, y)) { ink = true; break }
+  }
+  if (ink) {
+    if (cur === null) cur = { y0: y, y1: y }
+    else cur.y1 = y
+    whiteRun = 0
+  } else if (cur !== null) {
+    whiteRun++
+    if (whiteRun >= GAP) { bands.push(cur); cur = null; whiteRun = 0 }
+  }
+}
+if (cur) bands.push(cur)
+if (!bands.length) {
+  console.error('❌ 源图中未找到任何内容')
+  process.exit(1)
+}
+
+const band = bands[0]
+let minX = W
+let maxX = -1
+for (let y = band.y0; y <= band.y1; y++) {
+  for (let x = 0; x < W; x++) {
+    if (isInk(x, y)) {
+      if (x < minX) minX = x
+      if (x > maxX) maxX = x
+    }
+  }
+}
+if (maxX < 0) {
+  console.error('❌ 第一条内容行带为空')
+  process.exit(1)
+}
+
+const cx = (minX + maxX + 1) / 2
+const cy = (band.y0 + band.y1 + 1) / 2
+const R = Math.max(maxX - minX + 1, band.y1 - band.y0 + 1) / 2
+const S = Math.ceil(R * 2) + MARGIN * 2
+
+// 2) 按圆生成 alpha 蒙版（圆外全透明，边缘 1px 渐变）
+const disc = { width: S, height: S, rgba: Buffer.alloc(S * S * 4) }
+for (let y = 0; y < S; y++) {
+  for (let x = 0; x < S; x++) {
+    const dx = x + 0.5 - S / 2
+    const dy = y + 0.5 - S / 2
+    let a = R - Math.sqrt(dx * dx + dy * dy) + 0.5
+    if (a <= 0) continue
+    if (a > 1) a = 1
+    const sx = Math.round(cx - S / 2 + x)
+    const sy = Math.round(cy - S / 2 + y)
+    if (sx < 0 || sy < 0 || sx >= W || sy >= H) continue
+    const si = (sy * W + sx) * 4
+    const o = (y * S + x) * 4
+    disc.rgba[o] = rgba[si]
+    disc.rgba[o + 1] = rgba[si + 1]
+    disc.rgba[o + 2] = rgba[si + 2]
+    disc.rgba[o + 3] = Math.round(a * 255)
+  }
+}
+
+// 3) 重采样到目标尺寸并落盘
+const out = resize(disc, SIZE, SIZE)
+fs.mkdirSync(path.dirname(OUT), { recursive: true })
+fs.writeFileSync(OUT, encodePng(out))
+
+let clear = 0
+for (let i = 0; i < SIZE * SIZE; i++) if (out.rgba[i * 4 + 3] < 10) clear++
+const ratio = clear / (SIZE * SIZE)
+const cornerOk = out.rgba[3] === 0 && out.rgba[(SIZE - 1) * 4 + 3] === 0
+const centerOk = out.rgba[((SIZE / 2) * SIZE + SIZE / 2) * 4 + 3] > 200
+
+console.log(`源图    ：${SRC}（${W}×${H}）`)
+console.log(`背景参考色：rgb(${bgRgb.map((v) => Math.round(v)).join(', ')})`)
+console.log(`内容行带：共 ${bands.length} 条 [${bands.map((b) => `y=${b.y0}~${b.y1}`).join(' / ')}]，取第 1 条 x=${minX}~${maxX}`)
+console.log(`圆心/半径：(${cx.toFixed(1)}, ${cy.toFixed(1)}) / R=${R.toFixed(1)}`)
+console.log(`产物    ：${path.relative(ROOT, OUT)}（${SIZE}×${SIZE}，${(fs.statSync(OUT).size / 1024).toFixed(1)} KB）`)
+console.log(`自检    ：圆外透明占比 ${(ratio * 100).toFixed(1)}% · 四角透明 ${cornerOk ? '✅' : '❌'} · 中心不透明 ${centerOk ? '✅' : '❌'}`)
+
+// 4) 可选：合成校验图（深绿底 / 白底 × 52px / 140px），人工确认缩到 52px 依然清晰
+if (previewPath) {
+  const PW = 760
+  const PH = 440
+  const canvas = { width: PW, height: PH, rgba: Buffer.alloc(PW * PH * 4) }
+  const hex2rgb = (hex) => [
+    parseInt(hex.slice(1, 3), 16),
+    parseInt(hex.slice(3, 5), 16),
+    parseInt(hex.slice(5, 7), 16),
+  ]
+  const fillRect = (x0, y0, w, h, hex) => {
+    const [r, g, b] = hex2rgb(hex)
+    for (let y = y0; y < y0 + h; y++) {
+      for (let x = x0; x < x0 + w; x++) {
+        const o = (y * PW + x) * 4
+        canvas.rgba[o] = r
+        canvas.rgba[o + 1] = g
+        canvas.rgba[o + 2] = b
+        canvas.rgba[o + 3] = 255
+      }
+    }
+  }
+  /** source-over 合成（把带透明通道的 LOGO 叠到背景上） */
+  const over = (img, ox, oy) => {
+    for (let y = 0; y < img.height; y++) {
+      for (let x = 0; x < img.width; x++) {
+        const si = (y * img.width + x) * 4
+        const a = img.rgba[si + 3] / 255
+        if (a === 0) continue
+        const o = ((oy + y) * PW + ox + x) * 4
+        canvas.rgba[o] = Math.round(img.rgba[si] * a + canvas.rgba[o] * (1 - a))
+        canvas.rgba[o + 1] = Math.round(img.rgba[si + 1] * a + canvas.rgba[o + 1] * (1 - a))
+        canvas.rgba[o + 2] = Math.round(img.rgba[si + 2] * a + canvas.rgba[o + 2] * (1 - a))
+        canvas.rgba[o + 3] = 255
+      }
+    }
+  }
+  fillRect(0, 0, PW / 2, PH, '#0a5f4d') // 左：登录页品牌栏底色
+  fillRect(PW / 2, 0, PW / 2, PH, '#ffffff') // 右：白色卡片底色
+  over(resize(out, 52, 52), 90, 90)
+  over(resize(out, 140, 140), 46, 190)
+  over(resize(out, 52, 52), PW / 2 + 90, 90)
+  over(resize(out, 140, 140), PW / 2 + 46, 190)
+  fs.writeFileSync(previewPath, encodePng(canvas))
+  console.log(`校验图  ：${previewPath}（深绿底/白底 × 52px/140px）`)
+}