/* ================================================
   导航系统 — 小清新 · 简洁现代风格
   ================================================ */

:root {
  --bg: #f8f9fc;
  --bg-card: #ffffff;
  --primary: #4f8ef7;
  --primary-hover: #3a77e0;
  --primary-light: rgba(79, 142, 247, 0.08);
  --accent: #4f8ef7;     /* accent = primary */
  --accent-dim: #4f8ef7;
  --success: #22c55e;
  --success-light: rgba(34, 197, 94, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.1);
  --ink: #1f2937;
  --ink-2: #4b5563;
  --ink-3: #9ca3af;
  --border: #e5e7eb;
  --border-light: #f3f4f6;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --max: 1120px;
  --font: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 15px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* 顶栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04);
}
.topbar-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-icon {
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.8rem;
  flex-shrink: 0;
  line-height: 1;
}
.brand-logo {
  height: 28px;
  width: auto;
  border-radius: 6px;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  font-size: 0.88rem;
}
.nav-links a {
  color: var(--ink-2);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: background 0.15s, color 0.15s;
  font-weight: 500;
}
.nav-links a:hover { background: var(--primary-light); color: var(--primary); }
.nav-links a.active { background: var(--primary-light); color: var(--primary); }
.nav-links .nav-admin a { color: var(--warning); }
.nav-links .nav-admin a:hover { background: var(--warning-light); color: var(--warning); }

/* 容器 */
.shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 20px 64px;
}
.admin-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 20px 64px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 40px 0 32px;
}
.hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
  color: var(--ink);
}
.hero-lead {
  font-size: 1rem;
  color: var(--ink-2);
  margin-bottom: 24px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* 搜索框 */
.search-wrap {
  max-width: 560px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.search-tabs {
  display: flex;
  border-bottom: 1.5px solid var(--border-light);
  background: var(--bg);
}
.search-tabs button,
.search-tabs a {
  flex: 1;
  text-align: center;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--ink-3);
  padding: 10px 14px;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.search-tabs button.is-on,
.search-tabs button:hover,
.search-tabs a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.search-bar {
  display: flex;
  gap: 0;
  padding: 8px 8px 8px;
}
.search-bar input[type="search"] {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 14px;
  font: inherit;
  font-size: 0.95rem;
  outline: none;
  color: var(--ink);
  min-width: 0;
}
.search-bar input::placeholder { color: var(--ink-3); }
.search-bar input:focus { background: var(--primary-light); border-radius: var(--radius); }

/* 分类Tab */
.cat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 20px;
  padding: 0;
  list-style: none;
}
.cat-tabs a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.15s;
}
.cat-tabs a:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.cat-tabs a.is-active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* 布局 */
.layout-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 24px;
  align-items: start;
}
@media (max-width: 860px) {
  .layout-2 { grid-template-columns: 1fr; }
}

/* 卡片 */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
}
.card-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
}
.card-title::before {
  content: '';
  width: 4px;
  height: 16px;
  background: var(--primary);
  border-radius: 2px;
}
.card h2, .card h3 { font-size: 1.05rem; font-weight: 700; margin: 0 0 12px; }

/* 网站网格 */
.site-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.site-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  text-decoration: none;
  color: inherit;
  transition: all 0.15s;
}
.site-card:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.site-ico {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-light);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1rem;
  color: var(--primary);
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid rgba(79,142,247,0.15);
}
.site-ico img { width: 100%; height: 100%; object-fit: cover; }
.site-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.site-card p { font-size: 0.78rem; color: var(--ink-3); margin: 0; }

/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-orange { background: var(--warning-light); color: var(--warning); }

/* 帖子列表 */
.post-list { }
.post-list article {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
  transition: background 0.15s;
  margin: 0 -8px;
  padding-left: 8px;
  padding-right: 8px;
  border-radius: var(--radius);
}
.post-list article:last-child { border-bottom: none; }
.post-list article:hover {
  background: var(--surface);
}
.post-list .post-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.post-list .post-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--border-light);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  overflow: hidden;
}
.post-list .post-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.post-list .post-info { flex: 1; min-width: 0; }
.post-list h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-list h3 a { color: var(--ink); text-decoration: none; }
.post-list h3 a:hover { color: var(--primary); }
.post-list .post-meta {
  font-size: 0.78rem;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.post-list .post-meta span { display: flex; align-items: center; gap: 3px; }
.post-list .post-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.post-tag {
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--border-light);
  color: var(--ink-2);
  font-size: 0.75rem;
  text-decoration: none;
}
.post-tag:hover { background: var(--primary-light); color: var(--primary); }

/* 帖子网格 */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.post-grid article { margin: 0; padding: 0; border: none; background: none; }
.post-grid article:hover { background: none; }
.post-grid .post-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all 0.2s;
  text-decoration: none;
  height: 100%;
  box-sizing: border-box;
}
.post-grid .post-item:hover {
  border-color: var(--primary-light);
  box-shadow: 0 2px 12px rgba(79, 142, 247, 0.08);
  transform: translateY(-1px);
}
.post-grid .post-thumb {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}
.post-grid .post-info { flex: 1; min-width: 0; }
.post-grid h3 {
  font-size: 0.9rem !important;
  margin-bottom: 6px !important;
  -webkit-line-clamp: 2 !important;
}
.post-grid .post-meta { font-size: 0.72rem !important; gap: 8px !important; }

/* 帖子列表（新样式） */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.2s;
}
.post-card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 2px 12px rgba(79, 142, 247, 0.1);
  transform: translateY(-1px);
}
.post-card-link {
  display: flex;
  gap: 16px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
}
.post-card-left {
  flex-shrink: 0;
}
.post-card-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
}
.post-card-body {
  flex: 1;
  min-width: 0;
}
.post-card-title {
  font-size: 1rem !important;
  font-weight: 600 !important;
  color: var(--ink);
  margin-bottom: 6px !important;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card:hover .post-card-title {
  color: var(--primary);
}
.post-card-excerpt {
  font-size: 0.85rem;
  color: var(--ink-2);
  margin-bottom: 8px !important;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--ink-3);
  flex-wrap: wrap;
}
.post-card-tags {
  display: flex;
  gap: 6px;
}
.post-card-tag {
  background: var(--border-light);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  color: var(--ink-2);
}
.post-card:hover .post-card-tag {
  background: var(--primary-light);
  color: var(--primary);
}

/* 侧栏 */
.sidebar .card + .card { margin-top: 16px; }

/* 排行榜 */
.rank-list { list-style: none; margin: 0; padding: 0; }
.rank-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.875rem;
  transition: background 0.15s;
}
.rank-list li:last-child { border-bottom: none; }
.rank-list li:hover { background: var(--surface); margin: 0 -12px; padding-left: 12px; padding-right: 12px; border-radius: var(--radius); }
.rank-list .rank-num {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--border-light);
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink-3);
  flex-shrink: 0;
}
.rank-list .rank-1 .rank-num {
  background: linear-gradient(135deg, #ffd700, #ffb800);
  color: #7a5a00;
  box-shadow: 0 2px 8px rgba(255, 184, 0, 0.3);
}
.rank-list .rank-2 .rank-num {
  background: linear-gradient(135deg, #c0c0c0, #a8a8a8);
  color: #5a5a5a;
  box-shadow: 0 2px 6px rgba(168, 168, 168, 0.3);
}
.rank-list .rank-3 .rank-num {
  background: linear-gradient(135deg, #cd7f32, #b8722e);
  color: #fff;
  box-shadow: 0 2px 6px rgba(184, 114, 46, 0.3);
}
.rank-list .rank-name {
  flex: 1;
  font-weight: 500;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.rank-list .rank-name:hover { color: var(--primary); }
.rank-list .rank-count {
  color: var(--ink-3);
  font-size: 0.78rem;
  background: var(--border-light);
  padding: 2px 8px;
  border-radius: 10px;
  flex-shrink: 0;
}

/* 公告 */
.announce {
  padding: 12px 16px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #fef9ee, #fef3e2);
  border: 1px solid #f5e6c8;
  margin-bottom: 20px;
  font-size: 0.875rem;
  color: #92400e;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.announce::before {
  content: '📢';
  flex-shrink: 0;
}

/* Banner */
.banner-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.banner-strip a {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform 0.15s, box-shadow 0.15s;
}
.banner-strip a:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.banner-strip img { width: 100%; height: 80px; object-fit: cover; display: block; }

/* 统计数字 */
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border-light);
}
.stat-row:last-child { border-bottom: none; }
.stat-row-label { color: var(--ink-2); }
.stat-row-val { font-weight: 700; color: var(--ink); }

/* 数字卡片（大号） */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin: 20px 0;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.stat-card-label { font-size: 0.8rem; color: var(--ink-3); font-weight: 500; margin-bottom: 6px; }
.stat-card-num { font-size: 1.8rem; font-weight: 800; color: var(--ink); letter-spacing: -0.02em; line-height: 1; }
.stat-card-sub { font-size: 0.75rem; color: var(--ink-3); margin-top: 4px; }
.stat-card.blue { border-top: 3px solid var(--primary); }
.stat-card.blue .stat-card-num { color: var(--primary); }
.stat-card.green { border-top: 3px solid var(--success); }
.stat-card.green .stat-card-num { color: var(--success); }
.stat-card.orange { border-top: 3px solid var(--warning); }
.stat-card.orange .stat-card-num { color: var(--warning); }
.stat-card.red { border-top: 3px solid var(--danger); }
.stat-card.red .stat-card-num { color: var(--danger); }

/* 仪表盘图表区 */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 20px 0;
}
.dash-chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.dash-chart-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.dash-chart-title span { font-weight: 400; color: var(--ink-3); font-size: 0.8rem; }

/* 简单柱状图 */
.bar-chart { display: flex; flex-direction: column; gap: 10px; }
.bar-item { display: flex; align-items: center; gap: 10px; font-size: 0.8rem; }
.bar-label { width: 60px; color: var(--ink-2); flex-shrink: 0; text-align: right; }
.bar-track { flex: 1; height: 8px; background: var(--border-light); border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 4px; background: var(--primary); transition: width 0.3s; }
.bar-fill.orange { background: var(--warning); }
.bar-fill.green { background: var(--success); }
.bar-fill.red { background: var(--danger); }
.bar-val { width: 36px; color: var(--ink-3); font-size: 0.75rem; text-align: right; }

/* 进度环 */
.donut-wrap { display: flex; align-items: center; gap: 20px; }
.donut-svg { width: 100px; height: 100px; flex-shrink: 0; }
.donut-legend { display: flex; flex-direction: column; gap: 6px; font-size: 0.8rem; }
.donut-legend-item { display: flex; align-items: center; gap: 6px; color: var(--ink-2); }
.donut-dot { width: 8px; height: 8px; border-radius: 50%; }

/* 表单 */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
}
.form-grid .span-2 { grid-column: span 2; }
.form-grid .span-3 { grid-column: span 3; }

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink);
}
.form-grid input,
.form-grid select,
.form-grid textarea {
  font: inherit;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  background: var(--bg);
  font-size: 0.9rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  color: var(--ink);
}
.form-grid input:focus,
.form-grid select:focus,
.form-grid textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
  background: var(--bg-card);
}
.form-grid textarea { min-height: 120px; resize: vertical; }

.check-row {
  flex-direction: row !important;
  align-items: center;
  gap: 10px !important;
  font-weight: 400 !important;
  font-size: 0.9rem !important;
}
.check-row input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--primary); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  color: var(--ink);
  transition: all 0.15s;
  line-height: 1;
  box-shadow: var(--shadow-sm);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }

/* 图片上传组件 */
.img-upload {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.img-upload-preview {
  position: relative;
  width: 100%;
  min-height: 120px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  overflow: hidden;
}
.img-upload-preview:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}
.img-upload-preview.has-image {
  border-style: solid;
  border-color: var(--border);
}
.img-upload-preview img {
  max-width: 100%;
  max-height: 300px;
  object-fit: contain;
  display: block;
}
.img-upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--ink-3);
  padding: 24px;
  text-align: center;
}
.img-upload-placeholder-icon {
  font-size: 2rem;
  opacity: 0.5;
}
.img-upload-placeholder-text {
  font-size: 0.85rem;
}
.img-upload-placeholder-hint {
  font-size: 0.75rem;
  color: var(--ink-3);
}
.img-upload-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}
.img-upload-actions .btn {
  flex: 1;
}
.img-upload-url-input {
  margin-top: 4px;
}
.img-upload-loading {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--primary);
  font-size: 0.85rem;
}
.img-upload-loading::after {
  content: '';
  width: 24px;
  height: 24px;
  border: 2px solid var(--primary-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: img-upload-spin 0.6s linear infinite;
}
@keyframes img-upload-spin {
  to { transform: rotate(360deg); }
}
.img-upload-error {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--danger-light);
  color: var(--danger);
  font-size: 0.75rem;
  padding: 6px 12px;
}

/* 拖拽状态 */
.img-upload-preview.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: scale(1.01);
}

/* 多图上传 */
.img-upload-multi {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
}
.img-upload-multi-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}
.img-upload-multi-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-upload-multi-add {
  aspect-ratio: 1;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  color: var(--ink-3);
  font-size: 0.75rem;
  transition: all 0.2s;
}
.img-upload-multi-add:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.img-upload-multi-remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
}
.img-upload-multi-item:hover .img-upload-multi-remove {
  opacity: 1;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(79,142,247,0.25);
}
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; transform: translateY(-1px); }
.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; border-color: #16a34a; color: #fff; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; border-color: #dc2626; color: #fff; }
.btn-ghost { background: transparent; border-color: transparent; box-shadow: none; }
.btn-ghost:hover { background: var(--border-light); transform: none; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }
.btn-select {
  padding: 8px 16px;
  min-width: 64px;
  text-align: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  color: var(--ink);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-select:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-select.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(79,142,247,0.25);
}

/* 提示框 */
@keyframes flash-in {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.flash {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: opacity 0.5s ease-out;
}
.flash-error { background: var(--danger-light); color: var(--danger); border-color: rgba(239,68,68,0.2); }
.flash-ok { background: var(--success-light); color: var(--success); border-color: rgba(34,197,94,0.2); }
.flash-warn { background: var(--warning-light); color: var(--warning); border-color: rgba(245,158,11,0.2); }
.flash-info { background: var(--primary-light); color: var(--primary); border-color: rgba(79,142,247,0.2); }

/* 表格 */
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.admin-table th, .admin-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border-light); }
.admin-table th { font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3); background: var(--bg); }
.admin-table tr:hover td { background: var(--bg); }
.admin-table .actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* 状态标签 */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.status-pending { background: var(--warning-light); color: var(--warning); }
.status-approved { background: var(--success-light); color: var(--success); }
.status-rejected { background: var(--danger-light); color: var(--danger); }
.status-published { background: var(--success-light); color: var(--success); }
.status-draft { background: var(--border-light); color: var(--ink-3); }
.status-open { background: var(--warning-light); color: var(--warning); }
.status-resolved { background: var(--success-light); color: var(--success); }
.status-new { background: var(--primary-light); color: var(--primary); }
.status-active { background: var(--success-light); color: var(--success); }

/* 标签页切换 */
.tab-bar {
  display: flex;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: 20px;
  gap: 0;
}
.tab-btn {
  padding: 10px 18px;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--ink-3);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--primary); }
.tab-btn.is-active { color: var(--primary); border-bottom-color: var(--primary); }

/* 图标选择器 */
.icon-picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
  gap: 8px;
  max-height: 240px;
  overflow-y: auto;
  padding: 4px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}
.icon-picker-item {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  background: var(--bg-card);
  cursor: pointer;
  transition: all 0.15s;
  font-size: 1.3rem;
  color: var(--ink-2);
}
.icon-picker-item:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }
.icon-picker-item.selected { border-color: var(--primary); background: var(--primary); color: #fff; }

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--ink-3);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: 12px; opacity: 0.5; }
.empty-state p { font-size: 0.9rem; }

/* 分页 */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 24px;
}
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--ink-2);
  transition: all 0.15s;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 管理后台导航 */
.admin-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.admin-nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
  transition: all 0.15s;
}
.admin-nav a:hover { background: var(--primary-light); color: var(--primary); }
.admin-nav a.active { background: var(--primary); color: #fff; }

/* 安装页 */
.page-install {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  background: var(--bg);
}
.install-wrap { width: min(560px, 100%); }
.install-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}
.install-head { text-align: center; margin-bottom: 28px; }
.install-kicker { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--primary); margin-bottom: 8px; }
.install-title { font-size: 1.6rem; font-weight: 800; color: var(--ink); margin-bottom: 6px; letter-spacing: -0.02em; }
.install-sub { color: var(--ink-3); font-size: 0.9rem; }

.check-list { list-style: none; margin: 0 0 18px; }
.check-list li { padding: 8px 0; border-bottom: 1px solid var(--border-light); font-size: 0.875rem; display: flex; align-items: center; gap: 8px; }
.check-list li::before { font-size: 1rem; flex-shrink: 0; }
.check-list li.ok::before { content: '✅'; }
.check-list li.bad::before { content: '❌'; }
.check-list li.warn::before { content: '⚠️'; }

/* 底部 */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 20px;
  text-align: center;
  font-size: 0.825rem;
  color: var(--ink-3);
  margin-top: 40px;
}

/* 搜索框（帖子页等通用） */
.search-bar-wrap {
  position: relative;
}
.search-input-group {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow-sm);
}
.search-input-group:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.search-icon {
  padding: 0 12px;
  font-size: 1rem;
  color: var(--ink-3);
  flex-shrink: 0;
}
.search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 10px 12px 10px 0;
  font: inherit;
  font-size: 0.9rem;
  outline: none;
  color: var(--ink);
  min-width: 200px;
}
.search-input::placeholder { color: var(--ink-3); }
.search-clear {
  padding: 0 12px;
  color: var(--ink-3);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.15s;
}
.search-clear:hover { color: var(--danger); }

/* 辅助 */
.muted { color: var(--ink-3); font-size: 0.875rem; }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }

/* 响应式 */
@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2, .form-grid .span-3 { grid-column: span 1; }
  .topbar-inner { padding: 0 14px; }
  .shell { padding: 16px 14px 48px; }
  .admin-wrap { padding: 16px 14px 48px; }
  .site-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
  .admin-nav { gap: 4px; }
  .admin-nav a { padding: 6px 10px; font-size: 0.8rem; }
}

/* 页面标题区 */
.page-head {
  margin-bottom: 24px;
}
.page-head h1 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.page-head p {
  font-size: 0.875rem;
  color: var(--ink-3);
  margin-top: 4px;
}