/* 校园墙 前端样式(自包含, 无外部依赖, 响应式: <768 / 768-1024 / >1024)
   视觉方向: 蓝色系精致化 —— 更细腻的层次阴影、统一间距与圆角、交互反馈与动效。
   注意: 类名与既有页面/脚本保持完全兼容, 新增类仅做增量扩展。 */
:root {
  --primary: #2f6fed;
  --primary-dark: #2358c4;
  --primary-light: #eaf1ff;
  --primary-grad: linear-gradient(135deg, #4b86ff 0%, #2f6fed 55%, #2358c4 100%);
  --danger: #e5484d;
  --success: #2e9e5b;
  --warn: #d9822b;
  --bg: #f4f6fb;
  --bg-soft: #fafbfe;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --border: #e6e9f0;
  --border-strong: #d7dce7;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow-xs: 0 1px 2px rgba(16, 24, 40, .05);
  --shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 1px 2px rgba(16, 24, 40, .04);
  --shadow-md: 0 4px 14px rgba(16, 24, 40, .07), 0 2px 4px rgba(16, 24, 40, .04);
  --shadow-lg: 0 14px 32px rgba(16, 24, 40, .12);
  --ring: 0 0 0 3px rgba(47, 111, 237, .16);
  --ease: cubic-bezier(.4, 0, .2, 1);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  background-image: radial-gradient(1200px 380px at 50% -160px, #eaf1ff 0%, rgba(234, 241, 255, 0) 70%);
  background-repeat: no-repeat;
  color: var(--text); line-height: 1.65; font-size: 15px;
  display: flex; flex-direction: column; min-height: 100vh;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .15s var(--ease); }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
::selection { background: rgba(47, 111, 237, .18); }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* 布局 */
.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.layout { display: grid; grid-template-columns: 1fr 280px; gap: 20px; align-items: start; }
main { flex: 1 0 auto; padding: 22px 0 44px; }

/* 头部 */
header.site-header {
  background: rgba(255, 255, 255, .88);
  -webkit-backdrop-filter: saturate(1.6) blur(10px);
  backdrop-filter: saturate(1.6) blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.site-header .inner { display: flex; align-items: center; gap: 14px; height: 60px; }
.brand {
  font-size: 18px; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px; letter-spacing: .2px;
}
.brand:hover { text-decoration: none; color: var(--primary); }
.brand img { height: 28px; border-radius: 7px; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; flex-wrap: wrap; }
.nav a.navlink, .nav button.navlink {
  padding: 7px 12px; border-radius: 10px; color: var(--text); font-size: 14px;
  background: none; border: 0; cursor: pointer; font-family: inherit;
  transition: background .15s var(--ease), color .15s var(--ease), transform .15s var(--ease);
}
.nav a.navlink:hover, .nav button.navlink:hover { background: var(--primary-light); color: var(--primary-dark); text-decoration: none; }
.nav a.navlink:active, .nav button.navlink:active { transform: scale(.97); }
.nav a.active { color: var(--primary); font-weight: 600; background: var(--primary-light); }
.user-chip { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--muted); padding: 0 2px; }

/* 卡片与通用元素 */
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px; margin-bottom: 14px;
  transition: box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.card h2, .card h3 { margin: 0 0 12px; font-size: 16px; }
.card h3 { letter-spacing: .2px; }
.page-title { font-size: 21px; font-weight: 700; margin: 0 0 16px; letter-spacing: .3px; }
.muted { color: var(--muted); font-size: 13px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.spacer { flex: 1; }
.tag {
  display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: 12px;
  background: var(--bg); color: var(--muted); border: 1px solid var(--border); line-height: 1.6;
}
.tag.pending { color: var(--warn); border-color: #f0d4ae; background: #fdf6ec; }
.tag.approved { color: var(--success); border-color: #bfe3cb; background: #f0faf3; }
.tag.rejected { color: var(--danger); border-color: #f3c9ca; background: #fdf1f1; }
.tag.pinned { color: var(--primary); border-color: #c6d8fb; background: #f0f5ff; }
.tag.sensitive { color: var(--danger); border-color: #f3c9ca; background: #fdf1f1; }
/* 申诉标记: 作者对被拒投稿申诉后重新进入队列, 需要和普通待审/敏感词一眼区分 */
.tag.appeal { color: #8a5a00; border-color: #ecd39a; background: #fff8e6; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 15px; border-radius: 10px; border: 1px solid var(--border-strong); background: var(--card);
  color: var(--text); font-size: 14px; cursor: pointer; font-family: inherit;
  transition: background .15s var(--ease), border-color .15s var(--ease), box-shadow .15s var(--ease), transform .12s var(--ease);
  box-shadow: var(--shadow-xs);
}
.btn:hover { background: var(--bg-soft); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { box-shadow: var(--ring); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); box-shadow: 0 4px 12px rgba(47, 111, 237, .28); }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.danger:hover { background: #d13c41; border-color: #d13c41; box-shadow: 0 4px 12px rgba(229, 72, 77, .26); }
.btn.ghost { background: transparent; box-shadow: none; }
.btn.ghost:hover { background: var(--bg); }
.btn.sm { padding: 4px 10px; font-size: 13px; border-radius: 8px; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; box-shadow: none; }

/* 表单 */
label.field { display: block; margin-bottom: 13px; }
label.field span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
input[type=text], input[type=password], input[type=email], input[type=tel], input[type=number], input[type=search], select, textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border-strong); border-radius: 10px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease), background .15s var(--ease);
}
input:hover, textarea:hover, select:hover { border-color: #c3cad8; }
textarea { min-height: 110px; resize: vertical; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: var(--ring); }
.checkbox { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; cursor: pointer; }
.checkbox input { width: auto; accent-color: var(--primary); }

/* 投稿卡片 */
.post-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 16px; margin-bottom: 12px;
  transition: box-shadow .2s var(--ease), transform .2s var(--ease), border-color .2s var(--ease);
}
.post-card:hover { box-shadow: var(--shadow-md); border-color: var(--border-strong); transform: translateY(-1px); }
.post-head { display: flex; align-items: center; gap: 9px; margin-bottom: 8px; }
.avatar {
  width: 34px; height: 34px; border-radius: 50%; background: var(--primary-light);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; color: var(--primary-dark); overflow: hidden; flex: 0 0 auto;
  border: 1px solid #dbe6ff;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.post-body { white-space: pre-wrap; word-break: break-word; }
.post-images { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; margin-top: 10px; }
.post-images img {
  border-radius: 10px; cursor: zoom-in; object-fit: cover; width: 100%; height: 120px;
  transition: transform .25s var(--ease), filter .25s var(--ease);
}
.post-images img:hover { transform: scale(1.02); filter: brightness(.96); }
.post-actions { display: flex; gap: 16px; margin-top: 12px; font-size: 13px; color: var(--muted); align-items: center; }
.post-actions button { background: none; border: 0; color: inherit; cursor: pointer; font-size: 13px; font-family: inherit; padding: 0; transition: color .15s var(--ease); }
.post-actions button:hover, .post-actions a:hover { color: var(--primary); text-decoration: none; }
.post-actions button.liked { color: var(--primary); font-weight: 600; }

/* 评论区 */
.comment { padding: 11px 0; border-top: 1px dashed var(--border); }
.comment:first-child { border-top: 0; }
.comment .meta { font-size: 12px; color: var(--muted); }

/* 页脚 */
footer.site-footer { flex-shrink: 0; background: var(--card); border-top: 1px solid var(--border); padding: 20px 0; margin-top: auto; }
footer .fgroups { display: flex; flex-direction: column; gap: 8px; }
footer .fgroup { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; font-size: 13px; color: var(--muted); }
footer .fgroup .gname { color: var(--text); font-weight: 600; }
footer .fgroup a { color: var(--muted); }
footer .fgroup a:hover { color: var(--primary); }
footer .copyright { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); }

/* 提示与弹窗 */
#toast-wrap { position: fixed; top: 16px; left: 50%; transform: translateX(-50%); z-index: 9999; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast {
  background: #23272f; color: #fff; padding: 10px 17px; border-radius: 10px; font-size: 14px;
  box-shadow: var(--shadow-lg); max-width: 90vw; animation: toast-in .22s var(--ease);
}
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }
@keyframes toast-in { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }
.modal-mask {
  position: fixed; inset: 0; background: rgba(15, 20, 30, .48);
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center; z-index: 9998; padding: 16px;
  animation: mask-in .18s var(--ease);
}
.modal {
  background: #fff; border-radius: var(--radius-lg); padding: 20px; width: 100%; max-width: 520px;
  max-height: 86vh; overflow: auto; box-shadow: var(--shadow-lg); animation: modal-in .22s var(--ease);
}
.modal h3 { margin: 0 0 12px; font-size: 17px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
@keyframes mask-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes modal-in { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 6px 10px; font-size: 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

/* 表格 */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td { padding: 9px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
table.data th { color: var(--muted); font-weight: 600; white-space: nowrap; background: var(--bg-soft); position: sticky; top: 0; }
table.data tbody tr { transition: background .15s var(--ease); }
table.data tbody tr:hover { background: var(--bg-soft); }
table.data tbody tr:last-child td { border-bottom: 0; }

/* 统计 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); gap: 10px; }
.stat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 13px;
  box-shadow: var(--shadow-xs); position: relative; overflow: hidden;
  transition: box-shadow .2s var(--ease), transform .2s var(--ease);
}
.stat:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.stat::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--primary-grad); opacity: .85; }
.stat .num { font-size: 23px; font-weight: 700; letter-spacing: .4px; font-variant-numeric: tabular-nums; }
.stat .lbl { font-size: 12px; color: var(--muted); }

/* 侧栏 */
.side-block {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 15px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.side-block h3 { margin: 0 0 8px; font-size: 15px; }

.empty { text-align: center; color: var(--muted); padding: 30px 10px; font-size: 14px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.tabs button {
  padding: 6px 13px; border-radius: 999px; border: 1px solid var(--border); background: #fff;
  cursor: pointer; font-size: 14px; font-family: inherit; color: var(--text);
  transition: background .15s var(--ease), color .15s var(--ease), border-color .15s var(--ease);
}
.tabs button:hover { background: var(--primary-light); border-color: #c6d8fb; }
.tabs button.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 3px 10px rgba(47, 111, 237, .24); }
.sensitive-hint { background: #fdf1f1; border: 1px solid #f3c9ca; color: var(--danger); border-radius: 8px; padding: 8px 10px; font-size: 13px; margin-top: 8px; }
.thumb-list { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.thumb-list .thumb { position: relative; width: 84px; height: 84px; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
.thumb-list .thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb-list .thumb button { position: absolute; top: 2px; right: 2px; border: 0; background: rgba(0, 0, 0, .55); color: #fff; border-radius: 6px; cursor: pointer; font-size: 12px; padding: 1px 5px; }
.drag-item {
  display: flex; align-items: center; gap: 8px; padding: 9px; border: 1px solid var(--border);
  border-radius: 10px; background: #fff; margin-bottom: 6px; cursor: grab;
  transition: box-shadow .15s var(--ease), border-color .15s var(--ease);
}
.drag-item:hover { border-color: var(--border-strong); box-shadow: var(--shadow-xs); }
.drag-item.dragging { opacity: .5; }
.notice-bar {
  background: #fff8e6; border: 1px solid #f2ddaa; color: #8a6116; border-radius: 10px;
  padding: 10px 13px; font-size: 14px; margin-bottom: 12px;
}

/* 首页 hero(投稿入口) */
.hero-card {
  background: var(--primary-grad); color: #fff; border: 0; position: relative; overflow: hidden;
  border-radius: var(--radius-lg); padding: 22px; margin-bottom: 18px;
  box-shadow: 0 10px 26px rgba(47, 111, 237, .22);
}
.hero-card::after {
  content: ''; position: absolute; right: -60px; top: -70px; width: 210px; height: 210px;
  border-radius: 50%; background: rgba(255, 255, 255, .13);
}
.hero-card::before {
  content: ''; position: absolute; right: 60px; bottom: -90px; width: 160px; height: 160px;
  border-radius: 50%; background: rgba(255, 255, 255, .09);
}
.hero-card strong { color: #fff; font-size: 17px; }
.hero-card .muted { color: rgba(255, 255, 255, .85); }
.hero-card .btn {
  background: #fff; color: var(--primary-dark); border-color: transparent; font-weight: 600;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .12);
}
.hero-card .btn:hover { background: #f2f6ff; color: var(--primary-dark); }
.hero-card > * { position: relative; z-index: 1; }

/* 看板图表 */
.chart-card { margin-bottom: 14px; }
.chart-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.chart-canvas-wrap { position: relative; width: 100%; height: 220px; }
.chart-canvas-wrap canvas { width: 100%; height: 220px; display: block; }
.legend { display: flex; gap: 14px; align-items: center; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: middle; }
.legend .lg-posts i { background: var(--primary); }
.legend .lg-users i { background: #7c5cff; }
.chart-empty { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 13px; }

/* 通过率进度条 */
.rate-bar { height: 10px; background: #eef1f7; border-radius: 999px; overflow: hidden; margin: 8px 0 6px; }
.rate-bar > span { display: block; height: 100%; background: var(--primary-grad); border-radius: 999px; transition: width .5s var(--ease); }
.review-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.review-item { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; background: var(--bg-soft); }
.review-item .num { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }
.review-item .lbl { font-size: 12px; color: var(--muted); }

/* 数据恢复 */
.backup-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: 10px; background: #fff; margin-bottom: 8px; flex-wrap: wrap;
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.backup-item:hover { border-color: var(--border-strong); box-shadow: var(--shadow-xs); }
.backup-item .bk-name { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; word-break: break-all; }
.alert { border-radius: 10px; padding: 10px 13px; font-size: 13px; margin-top: 10px; border: 1px solid; }
.alert.ok { background: #f0faf3; border-color: #bfe3cb; color: #1d6b3d; }
.alert.warn { background: #fff8e6; border-color: #f2ddaa; color: #8a6116; }
.alert.err { background: #fdf1f1; border-color: #f3c9ca; color: #a32a2f; }

/* 骨架屏 */
.skeleton {
  background: linear-gradient(90deg, #eef1f7 25%, #e4e9f2 37%, #eef1f7 63%);
  background-size: 400% 100%; animation: shimmer 1.3s ease-in-out infinite;
  border-radius: 8px; color: transparent;
}
.skeleton-line { height: 12px; margin-bottom: 8px; }
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }

/* 响应式 */
.nav-toggle {
  display: none; align-items: center; justify-content: center;
  width: 38px; height: 34px; border: 1px solid #dfe4ee; border-radius: 9px;
  background: #fff; font-size: 15px; line-height: 1; cursor: pointer; color: #33405c;
}
@media (max-width: 767px) {
  .layout { grid-template-columns: 1fr; }
  .site-header .inner { height: auto; flex-wrap: wrap; padding: 9px 0; gap: 8px; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .nav { display: none; width: 100%; margin-left: 0; flex-wrap: wrap; gap: 6px; padding-bottom: 2px; }
  .nav.open { display: flex; }
  .nav a.navlink, .nav button.navlink { padding: 8px 12px; font-size: 14px; white-space: nowrap; }
  .post-images { grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); }
  .post-images img { height: 96px; }
  .kv { grid-template-columns: 92px 1fr; }
  footer .fgroup { flex-direction: column; align-items: flex-start; gap: 4px; }
  .stat .num { font-size: 20px; }
  main { padding: 14px 0 30px; }
  .hero-card { padding: 18px; }
  .chart-canvas-wrap, .chart-canvas-wrap canvas { height: 180px; }
}
@media (min-width: 768px) and (max-width: 1024px) {
  .layout { grid-template-columns: 1fr 240px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ---------------- 应急模式: 顶部公告条 + 背景虚化 ---------------- */
/* 层级说明:
   .emg-banner 固定在最上层(z-index 10000)且不参与虚化 —— 公告必须第一眼可见、清晰可读;
   body.emg-blur 只把 header/main/footer 虚化并禁用指针事件, 形成"先看公告"的强制层级。
   用户点「查看内容」即解除虚化(见 app.js injectEmergencyBanner), 不阻断访问。 */
.emg-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 10000;
  display: flex; gap: 12px; align-items: flex-start; justify-content: center;
  padding: 12px 16px;
  background: linear-gradient(90deg, #b3261e, #e0483c);
  color: #fff; font-size: 14px; line-height: 1.65;
  box-shadow: 0 6px 20px rgba(179, 38, 30, .38);
}
.emg-banner .emg-main { flex: 1 1 auto; max-width: 900px; display: flex; gap: 10px; align-items: flex-start; }
.emg-banner .emg-badge {
  flex: none; font-weight: 700; font-size: 12px; line-height: 20px;
  padding: 1px 10px; border-radius: 999px; background: rgba(255, 255, 255, .24);
}
.emg-banner .emg-text { white-space: normal; word-break: break-word; max-height: 5.4em; overflow: auto; }
.emg-banner .emg-more {
  flex: none; padding: 6px 12px; border: 0; border-radius: 8px; cursor: pointer;
  background: #fff; color: #b3261e; font-size: 13px; font-weight: 600;
}
.emg-banner .emg-more:hover { background: #ffe6e3; }

body.emg-blur > header,
body.emg-blur > main,
body.emg-blur > footer {
  filter: blur(3px);
  pointer-events: none;
  user-select: none;
}

@media (max-width: 767px) {
  .emg-banner { flex-wrap: wrap; padding: 10px 12px; font-size: 13px; }
  .emg-banner .emg-main { flex-direction: column; gap: 4px; }
  .emg-banner .emg-text { max-height: 4.2em; }
  .emg-banner .emg-more { margin-left: auto; }
}