feat: 图标策略升级 + 引擎显隐就地切换 + 前后台一致性；界面美化

按反馈逐条处理：

① 界面美化
- 前台重做：品牌区（logo + 站名 + 副标题）、胶囊式引擎切换、圆角卡片与
  悬停浮起、聚焦光晕、合集标签页淡入动画；版心改为 shell 变量
  （--pad-x = max(gutter, (100% - wrap)/2)），与顶栏左右边缘严格对齐。
- 后台：表格窄屏可横向滚动、状态胶囊、自定义徽章、图标预览框。

② 自动更新图标质量差 + 允许自定义图标
- 抓取改为阶梯择优：manifest 512/192 → apple-touch-icon → <link rel=icon>
  （按 sizes 降序，SVG 视为最高清）→ 第三方聚合服务（favicon.yandex.net
  实测 100% 可用；icon.horse 可达时最高 256px）→ 站点自身 /favicon.ico。
- 逐个候选实测像素，达到 120px 即停；候选上限 8 个 + 10s 总预算，避免超时。
- 用 GD 只缩不放，统一存成 128×128 PNG；识别并丢弃第三方服务的
  「灰底字母」占位块。
- 新增 sites.icon_custom 列（带幂等迁移）：可上传图标或填图标地址；
  一旦自定义，「全部更新」只刷新名称、跳过图标。

③ 后台引擎「可见/不可见」不好用
- 小图标换成内联 SVG（原来用 emoji，跨字体显示成方块）。
- 切换改为 AJAX 原地生效 + 状态胶囊同步，不再点一下就跳页；
  所有切换/移动表单都带 p 参数，无 JS 时也能正确回到当前页。
- 修掉一个隐蔽的成因：本站此前完全不发 Cache-Control/Expires/ETag，
  浏览器只能自行猜测缓存策略，导致「改完刷新还是旧的」。现在所有动态页
  统一发 no-store/no-cache。

④ deploy/ 与 data/ 误入版本库
- 两目录整目录忽略，部署脚本移出仓库（存 _tooling/），已 git rm --cached。
  （历史提交里仍含这些文件，如需彻底抹除需 git filter-repo，待确认。）

附带修复（线上实测驱动）
- 服务器侧页面缓存：宝塔「网站加速」Apache(mod_lua) 版是一层基于 memcached
  的 30 秒整页缓存，且**读不到 FastCGI 返回的 Cache-Control**，所以 no-store
  挡不住它；唯一信号是请求 cookie X_CACHE=1。已在根 .htaccess 用
  RequestHeader 在请求侧注入该标记（实测任何访客均 X-Cache: MISS），
  PHP 侧另发一颗 cookie 作为 Nginx 环境的兜底（BYPASS_PAGE_CACHE 开关）。
- 静态资源改为「长缓存 + 版本号」：asset()/icon_src() 拼 mtime+size，
  assets/.htaccess 与根 .htaccess 给出 max-age=31536000 immutable。
- 修 absolutize() 未还原 JSON 转义 \/ 导致部分图标 URL 抓不下来的问题。
- 修部署脚本 md5sum 在 Git Bash 下输出 "hash *path" 导致 38 项假「缺失文件」。

assets/css/admin.css

@@ -1,7 +1,12 @@
 /* 简航 SimpleNav —— 后台样式 */
+:root {
+  --wrap: 1140px;
+  --gutter: 16px;
+  --pad-x: max(var(--gutter), calc((100% - var(--wrap)) / 2));
+}
 body.admin { background: #eef0f3; color: #333; font-size: 14px; }
 .topbar {
-  display: flex; align-items: center; gap: 16px; padding: 0 20px; height: 56px;
+  display: flex; align-items: center; gap: 16px; padding: 0 var(--pad-x); height: 56px;
   background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,.06); position: sticky; top: 0; z-index: 50;
 }
 .topbar .brand { font-size: 17px; font-weight: 700; }
@@ -12,7 +17,7 @@ body.admin { background: #eef0f3; color: #333; font-size: 14px; }
 .topnav a:hover { background: #f2f4f7; }
 .topnav a.active { background: #2F6BF7; color: #fff; }
 .topright { display: flex; align-items: center; gap: 10px; color: #666; }
-.wrap { max-width: 1140px; margin: 20px auto 60px; padding: 0 16px; }
+.wrap { padding: 0 var(--pad-x); margin: 20px 0 60px; }
 
 .card { background: #fff; border-radius: 12px; padding: 18px; margin-bottom: 18px; box-shadow: 0 2px 10px rgba(0,0,0,.04); }
 .card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
@@ -43,6 +48,8 @@ body.admin { background: #eef0f3; color: #333; font-size: 14px; }
 .alert.err { background: #fdecec; color: #c0392b; }
 
 .tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
+/* 窄屏下表格自己横向滚动，绝不撑破页面 */
+.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
 .tbl th, .tbl td { padding: 9px 8px; text-align: left; border-bottom: 1px solid #f0f1f3; vertical-align: middle; }
 .tbl th { color: #888; font-weight: 500; }
 .tbl tr:hover td { background: #fafbfc; }
@@ -52,11 +59,68 @@ body.admin { background: #eef0f3; color: #333; font-size: 14px; }
 .mini { width: 26px; height: 26px; border-radius: 6px; object-fit: contain; background: #f4f5f7; }
 .mini.letter { display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 13px; }
 .inline { display: inline; }
-.ico-btn { border: none; background: #f2f4f7; width: 28px; height: 28px; border-radius: 6px; cursor: pointer; color: #555; margin: 0 1px; }
+.ico-btn {
+  display: inline-flex; align-items: center; justify-content: center;
+  border: none; background: #f2f4f7; width: 28px; height: 28px; border-radius: 6px;
+  cursor: pointer; color: #555; margin: 0 1px; padding: 0; transition: background .15s, color .15s;
+}
 .ico-btn:hover { background: #e6e9ee; }
+.ico-btn:disabled { opacity: .5; cursor: default; }
 .ico-btn.danger { color: #c0392b; }
+.ico-btn.danger:hover { background: #fdecec; }
 .ok-dot { color: #1a7f45; font-size: 12px; }
 
+/* 显示 / 隐藏 切换按钮：绿=显示中，灰=已隐藏 */
+.ico-btn.toggle { color: #9aa3af; }
+.ico-btn.toggle:hover { background: #e6e9ee; color: #555; }
+.ico-btn.toggle.on { color: #1a7f45; background: #e8f6ee; }
+.ico-btn.toggle.on:hover { background: #d6efe1; }
+.ico-btn.toggle svg { display: block; }
+
+/* 状态胶囊 */
+.state {
+  display: inline-block; min-width: 52px; padding: 2px 8px; border-radius: 10px;
+  font-size: 12px; line-height: 18px; text-align: center; vertical-align: middle;
+}
+.state.on { background: #e8f6ee; color: #1a7f45; }
+.state.off { background: #f1f3f5; color: #98a2b3; }
+
+/* 「自定义图标」标记 */
+.badge {
+  display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 8px;
+  background: #eef3ff; color: #2F6BF7; font-size: 11px; line-height: 16px; vertical-align: middle;
+}
+
+/* 图数字段 */
+.icon-field {
+  display: flex; gap: 16px; align-items: flex-start; padding: 12px;
+  border: 1px dashed #d9dde3; border-radius: 10px; background: #fafbfc;
+}
+.icon-field-preview { flex: 0 0 72px; }
+.icon-preview {
+  display: flex; align-items: center; justify-content: center; width: 72px; height: 72px;
+  border-radius: 14px; background: #fff; border: 1px solid #e6e9ee; overflow: hidden;
+}
+.icon-preview img { width: 100%; height: 100%; object-fit: contain; background: #fff; }
+.icon-preview .ph { color: #bbb; font-size: 12px; }
+.icon-field-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
+.icon-field-title { font-size: 13px; color: #555; font-weight: 600; }
+.icon-field-body input[type=text] {
+  height: 38px; padding: 0 10px; border: 1px solid #d9dde3; border-radius: 8px; font-size: 14px; width: 100%;
+}
+.icon-field-body input[type=text]:focus { outline: none; border-color: #2F6BF7; }
+.icon-row2 { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
+.icon-row2 .chk { display: inline-flex; flex-direction: row; align-items: center; gap: 6px; font-size: 13px; color: #555; }
+.icon-row2 input[type=file] {
+  font-size: 13px; color: #666; background: #fff; border: 1px solid #d9dde3;
+  border-radius: 8px; padding: 6px 8px; max-width: 300px;
+}
+.icon-field .hint { line-height: 1.75; margin: 0; }
+.icon-field .hint b { color: #2F6BF7; }
+
+/* 已隐藏的行稍作弱化 */
+.tbl tr.row-off td:first-child, .tbl tr.row-off td:nth-child(2) { color: #98a2b3; }
+
 /* 登录页 */
 .login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
 .login-card { width: 340px; background: #fff; border-radius: 14px; padding: 30px 26px; box-shadow: 0 10px 30px rgba(0,0,0,.08); text-align: center; }
@@ -69,6 +133,10 @@ body.admin { background: #eef0f3; color: #333; font-size: 14px; }
 
 @media (max-width: 720px) {
   .grid-form { grid-template-columns: 1fr; }
-  .topbar { flex-wrap: wrap; height: auto; padding: 10px 14px; }
+  .topbar { flex-wrap: wrap; height: auto; padding: 10px var(--pad-x); }
+  .tbl { min-width: 620px; }
   .tbl .ell { max-width: 120px; }
+  .icon-field { flex-direction: column; }
+  .icon-field-preview { flex: 0 0 auto; }
+  .icon-row2 input[type=file] { max-width: 100%; }
 }

assets/css/style.css

@@ -1,116 +1,192 @@
-/* 简航 SimpleNav —— 样式（复刻 n.yangyq.net 的灰底白卡片风格，去 Bootstrap 依赖） */
-:root { --primary: #2F6BF7; }
+/* 简航 SimpleNav —— 前台样式
+   在 n.yangyq.net「浅灰底 + 白卡片」基础上做了现代化处理：
+   圆角更大、阴影分层、悬停微动效、顶部品牌区与胶囊式搜索引擎切换。 */
+:root {
+  --primary: #2F6BF7;
+  --primary-dark: #2456cc;
+  --primary-soft: #eef3ff;
+  --bg-1: #f4f6fa;
+  --bg-2: #e8ecf4;
+  --card: #ffffff;
+  --text: #22262b;
+  --muted: #7b8794;
+  --line: #eaedf3;
+  --radius-lg: 18px;
+  --radius: 12px;
+  /* 版心：只推一次 —— 顶栏与正文共用同一个左右内边距，两边算出来严格相等 */
+  --wrap: 1140px;
+  --gutter: 16px;
+  --pad-x: max(var(--gutter), calc((100% - var(--wrap)) / 2));
+  --shadow-sm: 0 1px 2px rgba(23, 43, 77, .05), 0 4px 12px rgba(23, 43, 77, .05);
+  --shadow: 0 2px 4px rgba(23, 43, 77, .04), 0 10px 30px rgba(23, 43, 77, .08);
+}
 * { box-sizing: border-box; }
+html { -webkit-text-size-adjust: 100%; }
 body {
   margin: 0;
+  min-height: 100vh;
   font-size: 14px;
   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
-  background: #d8d9da;
-  color: #333;
+  color: var(--text);
+  background: linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 100%) fixed;
   overflow-x: hidden;
+  -webkit-font-smoothing: antialiased;
 }
 a { text-decoration: none; color: inherit; }
-.container { max-width: 1140px; margin: 50px auto 40px; padding: 0 15px; }
+.container { padding: 0 var(--pad-x); margin: 0 0 40px; }
+
+/* ---------- 顶部品牌区 ---------- */
+.hero { text-align: center; padding: 52px 0 22px; }
+.hero .logo {
+  display: block; width: 60px; height: 60px; margin: 0 auto 14px; border-radius: 18px;
+  box-shadow: 0 8px 22px rgba(47, 107, 247, .28);
+}
+.hero h1 { margin: 0; font-size: 25px; font-weight: 600; letter-spacing: .5px; }
+.hero p { margin: 7px 0 0; font-size: 13px; color: var(--muted); }
 
 /* ---------- 搜索 ---------- */
-.s-search { position: relative; z-index: 2000; margin-bottom: 10px; }
-.search-type { margin-bottom: 0; }
+.s-search { position: relative; z-index: 2000; max-width: 760px; margin: 0 auto 6px; }
+.search-type { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 14px; }
 .s-engine {
-  display: inline-block; padding: 6px 14px; margin: 0 2px 0 0;
-  background: rgba(255,255,255,.45); border-radius: 5px 5px 0 0; cursor: pointer;
-  font-size: 14px; line-height: 20px; transition: background .2s;
+  display: inline-block; padding: 6px 16px; border-radius: 999px; cursor: pointer;
+  background: rgba(255, 255, 255, .72); border: 1px solid rgba(255, 255, 255, .9);
+  font-size: 14px; line-height: 20px; color: #4a5568;
+  transition: transform .18s, box-shadow .18s, background .18s, color .18s;
+  user-select: none;
 }
 .s-engine span { color: var(--ec, #555); }
-.s-engine:hover { background: rgba(255,255,255,.75); }
-.s-engine.active { background: #fff; }
+.s-engine:hover { background: #fff; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
+.s-engine.active {
+  background: var(--ec, var(--primary)); border-color: var(--ec, var(--primary));
+  box-shadow: 0 6px 16px rgba(47, 107, 247, .26);
+}
+.s-engine.active span { color: #fff; }
+
 #search-form { position: relative; }
 #search-text {
-  width: 100%; height: 50px; line-height: 50px; text-indent: 14px; font-size: 16px;
-  border: none; border-radius: 5px; background: #fff; outline: 0;
-  box-shadow: 0 0.5rem 0.625rem rgba(212,212,212,.3); transition: box-shadow .3s;
+  width: 100%; height: 56px; line-height: 56px; text-indent: 22px; padding-right: 64px;
+  font-size: 16px; border: 2px solid transparent; border-radius: 28px; background: #fff;
+  color: var(--text); outline: 0; box-shadow: var(--shadow);
+  transition: border-color .2s, box-shadow .25s;
+}
+#search-text::placeholder { color: #a9b3c0; }
+#search-text:focus {
+  border-color: var(--primary);
+  box-shadow: 0 0 0 5px rgba(47, 107, 247, .12), var(--shadow);
 }
-#search-text:focus { box-shadow: 0 0 24px 0 rgba(50,50,50,.08); }
 #search button.submit {
-  position: absolute; top: 7px; right: 7px; width: 60px; height: 36px;
-  background: none; border: 0; border-radius: 3px; cursor: pointer; outline: none;
-}
-#search button.submit::after {
-  content: ""; display: block; width: 16px; height: 16px; margin: 0 auto;
-  border: 2px solid #c9c9c9; border-radius: 50%; position: relative;
-}
-#search button.submit::before {
-  content: ""; position: absolute; right: 20px; bottom: 9px; width: 7px; height: 2px;
-  background: #c9c9c9; transform: rotate(45deg);
+  position: absolute; top: 8px; right: 8px; width: 40px; height: 40px;
+  display: flex; align-items: center; justify-content: center;
+  border: 0; border-radius: 50%; background: var(--primary); color: #fff;
+  cursor: pointer; outline: none; transition: background .2s, transform .2s;
 }
+#search button.submit:hover { background: var(--primary-dark); transform: scale(1.05); }
+#search button.submit:active { transform: scale(.96); }
+
 #word {
-  position: absolute; list-style: none; top: 55px; left: 0; width: 100%; margin: 0;
-  background: #fff; border-radius: 5px; z-index: 20000; padding: 10px;
-  box-shadow: 0 0 10px #bbb; display: none;
+  position: absolute; list-style: none; top: 64px; left: 0; width: 100%; margin: 0;
+  background: #fff; border-radius: 16px; z-index: 20000; padding: 8px;
+  box-shadow: 0 16px 44px rgba(23, 43, 77, .16); display: none;
+  max-height: 336px; overflow-y: auto;
 }
-#word li { height: 35px; padding: 0 8px; line-height: 35px; cursor: pointer; font-size: 16px; border-radius: 5px; }
-#word li:hover { background: #eee; }
+#word li {
+  padding: 0 14px; height: 38px; line-height: 38px; cursor: pointer;
+  font-size: 15px; border-radius: 10px; color: #3d4753;
+  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
+}
+#word li:hover { background: var(--primary-soft); color: var(--primary); }
 
 /* ---------- 板块卡片 ---------- */
 .mylist {
-  list-style: none; margin: 16px 0; padding: 12px 20px;
-  background: #fff; border-radius: 15px; box-shadow: 0 0.5rem 0.625rem rgba(212,212,212,.3);
-  display: flex; flex-wrap: wrap;
+  list-style: none; margin: 18px 0; padding: 16px 20px 14px;
+  background: var(--card); border-radius: var(--radius-lg); box-shadow: var(--shadow);
+  display: flex; flex-wrap: wrap; transition: box-shadow .25s;
 }
+.mylist:hover { box-shadow: 0 4px 8px rgba(23, 43, 77, .05), 0 14px 38px rgba(23, 43, 77, .1); }
 .mylist > li.title {
-  width: 100%; margin: 0 0 10px; padding: 0 0 8px 10px; height: auto;
-  font-size: 16px; font-weight: 600; line-height: 24px;
-  border-bottom: 1px solid #eee; position: relative;
+  width: 100%; margin: 0 0 12px; padding: 0 0 10px 14px; height: auto;
+  font-size: 16px; font-weight: 600; line-height: 22px; color: #1f2733;
+  border-bottom: 1px solid var(--line); position: relative;
 }
 .mylist > li.title::before {
-  content: ""; position: absolute; left: 0; top: 3px; width: 4px; height: 18px;
-  background: var(--primary); border-radius: 2px;
+  content: ""; position: absolute; left: 0; top: 3px; width: 4px; height: 17px;
+  background: linear-gradient(180deg, var(--primary), #6f9bff);
+  border-radius: 2px;
 }
 .mylist > li.site { margin: 2px; }
 .mylist li.site a {
-  display: flex; flex-direction: column; align-items: center; width: 100px; padding: 10px 4px;
-  border-radius: 10px; transition: background .2s;
+  display: flex; flex-direction: column; align-items: center; width: 104px;
+  padding: 12px 6px 10px; border-radius: 14px;
+  transition: background .2s, transform .2s;
 }
-.mylist li.site a:hover { background: #f0f1f2; }
-.mylist li.site .icon { width: 45px; height: 45px; border-radius: 10px; background: #fff; object-fit: contain; }
+.mylist li.site a:hover { background: linear-gradient(180deg, #f7f9ff, var(--primary-soft)); transform: translateY(-3px); }
+.mylist li.site .icon {
+  width: 46px; height: 46px; border-radius: 12px; background: #fff;
+  object-fit: contain; box-shadow: 0 2px 8px rgba(23, 43, 77, .09);
+  transition: transform .2s;
+}
+.mylist li.site a:hover .icon { transform: scale(1.07); }
 .mylist li.site .ico-letter {
-  width: 45px; height: 45px; border-radius: 10px; color: #fff; font-size: 20px; font-weight: 600;
+  width: 46px; height: 46px; border-radius: 12px; color: #fff; font-size: 20px; font-weight: 600;
   display: flex; align-items: center; justify-content: center;
+  box-shadow: 0 2px 8px rgba(23, 43, 77, .14); transition: transform .2s;
 }
+.mylist li.site a:hover .ico-letter { transform: scale(1.07); }
 .mylist li.site .name {
-  width: 100%; margin-top: 6px; text-align: center; font-size: 13px; color: #555;
+  width: 100%; margin-top: 8px; text-align: center; font-size: 13px; color: #5b6673;
   white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
+  transition: color .2s;
 }
+.mylist li.site a:hover .name { color: var(--primary); }
 
 /* ---------- 合集标签页 ---------- */
-.collections { margin: 16px 0; }
+.collections { margin: 24px 0 0; }
 .collections-title {
-  font-size: 16px; font-weight: 600; padding: 0 0 8px 10px; margin: 0 0 10px;
-  position: relative;
+  font-size: 16px; font-weight: 600; color: #1f2733;
+  padding: 0 0 10px 14px; margin: 0 0 14px; position: relative;
 }
 .collections-title::before {
-  content: ""; position: absolute; left: 0; top: 3px; width: 4px; height: 18px;
-  background: var(--primary); border-radius: 2px;
+  content: ""; position: absolute; left: 0; top: 3px; width: 4px; height: 17px;
+  background: linear-gradient(180deg, var(--primary), #6f9bff); border-radius: 2px;
 }
-.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
+.tabs { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 14px; }
 .tabs .tab {
-  border: none; background: rgba(255,255,255,.65); color: #444; cursor: pointer;
-  padding: 7px 16px; border-radius: 18px; font-size: 14px; transition: all .2s;
+  border: 1px solid rgba(255, 255, 255, .9); background: rgba(255, 255, 255, .72);
+  color: #4a5568; cursor: pointer; padding: 8px 18px; border-radius: 999px;
+  font-size: 14px; transition: all .18s;
+}
+.tabs .tab:hover { background: #fff; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
+.tabs .tab.active {
+  background: var(--primary); border-color: var(--primary); color: #fff;
+  box-shadow: 0 6px 16px rgba(47, 107, 247, .26);
 }
-.tabs .tab:hover { background: #fff; }
-.tabs .tab.active { background: var(--primary); color: #fff; }
 .tab-panel { display: none; }
-.tab-panel.active { display: flex; }
+.tab-panel.active { display: flex; animation: fadeUp .28s ease both; }
+@keyframes fadeUp {
+  from { opacity: 0; transform: translateY(8px); }
+  to   { opacity: 1; transform: none; }
+}
 
 /* ---------- 页脚 ---------- */
-.foot { text-align: center; color: #8a8a8a; font-size: 12px; margin: 24px 0 0; }
-.foot a { color: #8a8a8a; }
+.foot {
+  text-align: center; color: #97a1ae; font-size: 12px; margin: 30px 0 0;
+  padding-top: 18px; border-top: 1px solid rgba(23, 43, 77, .06);
+}
+.foot a { color: #97a1ae; transition: color .2s; }
 .foot a:hover { color: var(--primary); }
 
 /* ---------- 响应式 ---------- */
 @media (max-width: 767px) {
-  .container { margin-top: 24px; }
-  .mylist { border-radius: 10px; padding: 10px 12px; }
-  .mylist li.site a { width: 25%; }
-  .mylist li.site .icon, .mylist li.site .ico-letter { width: 40px; height: 40px; }
+  .hero { padding: 28px 0 16px; }
+  .hero .logo { width: 52px; height: 52px; border-radius: 15px; }
+  .hero h1 { font-size: 21px; }
+  .s-search { margin-bottom: 2px; }
+  .search-type { gap: 6px; margin-bottom: 10px; }
+  .s-engine { padding: 5px 13px; font-size: 13px; }
+  #search-text { height: 50px; line-height: 50px; font-size: 15px; text-indent: 18px; }
+  #word { top: 58px; }
+  .mylist { border-radius: 14px; padding: 12px 12px 10px; }
+  .mylist li.site a { width: 25%; padding: 10px 2px 8px; }
+  .mylist li.site .icon, .mylist li.site .ico-letter { width: 42px; height: 42px; }
   .mylist li.site .name { font-size: 12px; }
 }