/* ============ 物津社区 基础样式 ============ */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --danger: #dc2626;
  --ok: #16a34a;
  --warn: #d97706;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, .08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
code { background: #f3f4f6; padding: 1px 6px; border-radius: 4px; font-size: .9em; }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.main { flex: 1; padding-top: 20px; padding-bottom: 40px; }
.muted { color: var(--muted); font-size: .9em; }
.center { text-align: center; }

/* ---------- 页头 ---------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.header-inner { display: flex; align-items: center; gap: 18px; height: 60px; }
.logo { font-size: 20px; font-weight: 800; color: var(--text); white-space: nowrap; }
.logo:hover { color: var(--primary); }
.nav { display: flex; gap: 4px; flex: 1; overflow-x: auto; }
.nav a {
  color: var(--text);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 14px;
  white-space: nowrap;
}
.nav a:hover { background: var(--primary-light); color: var(--primary-dark); }
.nav a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 8px; }

.user-menu { position: relative; }
.user-menu .dropdown {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
  min-width: 140px;
  padding: 6px;
  z-index: 200;
}
.user-menu:hover .dropdown { display: block; }
.user-menu .dropdown a {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}
.user-menu .dropdown a:hover { background: var(--primary-light); color: var(--primary-dark); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: #fff;
  color: var(--text);
  transition: all .15s;
  white-space: nowrap;
  font-family: inherit;
}
.btn:hover { opacity: .92; color: inherit; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-ghost { background: #fff; border-color: var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn-block { width: 100%; }
.link-danger {
  background: none;
  border: none;
  color: var(--danger);
  font-size: 13px;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
}
.link-danger:hover { text-decoration: underline; }

/* ---------- 提示条 ---------- */
.flash {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  border: 1px solid;
}
.flash-success { background: #f0fdf4; border-color: #bbf7d0; color: #15803d; }
.flash-warning { background: #fffbeb; border-color: #fde68a; color: #b45309; }
.flash-danger { background: #fef2f2; border-color: #fecaca; color: #b91c1c; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  border-radius: 16px;
  color: #fff;
  padding: 46px 24px;
  text-align: center;
  margin-bottom: 28px;
}
.hero h1 { font-size: 30px; margin-bottom: 8px; }
.hero-sub { opacity: .9; margin-bottom: 22px; }
.hero-search { display: flex; gap: 10px; max-width: 520px; margin: 0 auto; }
.hero-search input {
  flex: 1;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
}

/* ---------- 区块 ---------- */
.section { margin-bottom: 32px; }
.section-title { font-size: 18px; margin-bottom: 14px; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.section-head .section-title { margin-bottom: 0; }
.more { font-size: 13px; }

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.page-head h1 { font-size: 22px; }

/* ---------- 分类卡片 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.cat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  transition: all .15s;
}
.cat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, .12);
  border-color: var(--primary);
}
.cat-icon { display: block; font-size: 34px; margin-bottom: 8px; }
.cat-name { display: block; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.cat-count { font-size: 12px; color: var(--muted); }

/* ---------- 信息卡片 ---------- */
.post-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.post-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all .15s;
}
.post-card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0, 0, 0, .1); }
.post-cover {
  aspect-ratio: 16/10;
  background: #eef2f7;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.post-cover img { width: 100%; height: 100%; object-fit: cover; }
.no-cover { font-size: 42px; }
.post-body { padding: 12px 14px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.post-body h3 { font-size: 15px; color: var(--text); line-height: 1.4; }
.post-card:hover h3 { color: var(--primary); }
.post-desc { font-size: 13px; color: var(--muted); flex: 1; }
.post-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.tag {
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
}
.price { color: var(--danger); font-weight: 700; font-size: 14px; }
.price.big { font-size: 20px; }
.time { color: var(--muted); }
.empty {
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  color: var(--muted);
}

/* ---------- 两栏 ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.two-col > div { min-width: 0; }

/* ---------- 板块 / 帖子列表 ---------- */
.board-list { display: flex; flex-direction: column; gap: 12px; }
.board-list.big { margin-bottom: 10px; }
.board-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.board-row:hover { border-color: var(--primary); }
.board-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.board-info strong { color: var(--text); font-size: 16px; }
.board-info span { color: var(--muted); font-size: 13px; }
.board-count { color: var(--muted); font-size: 13px; white-space: nowrap; }
.hot-list, .thread-list, .reply-list { list-style: none; }
.hot-list li, .thread-list li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.thread-title { color: var(--text); font-weight: 600; font-size: 15px; }
.thread-title:hover { color: var(--primary); }
.hot-list a { color: var(--text); }
.hot-list a:hover { color: var(--primary); }

/* ---------- 分类页签 ---------- */
.cat-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.cat-tab {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 13px;
}
.cat-tab:hover { border-color: var(--primary); color: var(--primary); }
.cat-tab.active { background: var(--primary); border-color: var(--primary); color: #fff; }

.inline-search { display: flex; gap: 8px; }
.inline-search input {
  width: 240px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
}

/* ---------- 分页 ---------- */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }
.pagination .page {
  min-width: 34px;
  padding: 6px 10px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 14px;
}
.pagination .page:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------- 表单 / 卡片 ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.form { display: flex; flex-direction: column; gap: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row { display: flex; flex-direction: column; gap: 6px; }
.form-label { font-size: 14px; font-weight: 600; }
.form-label b { color: var(--danger); }
.form input[type="text"],
.form input[type="password"],
.form input[type="number"],
.form select,
.form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}
.form-actions { display: flex; gap: 10px; }

.upload-box { border: 1px dashed var(--border); border-radius: 10px; padding: 14px; background: #fafbfc; }
.upload-box input[type="file"] { font-size: 13px; }
.preview-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.preview-grid img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.voice-preview { margin-top: 10px; }
.voice-preview audio { width: 100%; }

/* ---------- 面包屑 / 详情 ---------- */
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.detail-grid { display: grid; grid-template-columns: 1fr 320px; gap: 20px; align-items: start; }
.detail-main { min-width: 0; }
.detail-head { margin: 16px 0 10px; }
.detail-head h1 { font-size: 22px; margin-bottom: 8px; }
.gallery { position: relative; border-radius: var(--radius); overflow: hidden; background: #000; }
.gallery-track { display: flex; }
.gallery-track img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: contain;
  background: #111;
  display: none;
}
.gallery-track img.active { display: block; }
.gallery-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, .45);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  font-size: 18px;
  cursor: pointer;
}
.gallery-btn.prev { left: 10px; }
.gallery-btn.next { right: 10px; }
.gallery-dots { position: absolute; bottom: 10px; left: 0; right: 0; display: flex; gap: 6px; justify-content: center; }
.gallery-dots span { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, .5); cursor: pointer; }
.gallery-dots span.active { background: #fff; }

.voice-block { background: var(--primary-light); border-radius: 10px; padding: 14px; margin: 14px 0; }
.voice-block h4 { font-size: 14px; margin-bottom: 8px; color: var(--primary-dark); }
.voice-block audio { width: 100%; }

.detail-facts { display: flex; gap: 14px; flex-wrap: wrap; margin: 14px 0; }
.detail-facts div { background: #f3f4f6; border-radius: 8px; padding: 6px 12px; font-size: 13px; }
.detail-facts dt { color: var(--muted); display: inline; }
.detail-facts dd { display: inline; font-weight: 600; margin-left: 4px; }
.detail-content { white-space: pre-wrap; word-break: break-word; margin: 8px 0 16px; font-size: 15px; }
.owner-actions { border-top: 1px solid var(--border); padding-top: 14px; }

.detail-side { display: flex; flex-direction: column; gap: 14px; }
.contact-card h4 { margin-bottom: 6px; }
.contact-nick { font-size: 16px; font-weight: 700; }
.contact-line { color: var(--text); background: #f3f4f6; border-radius: 8px; padding: 8px 12px; margin: 10px 0 14px; word-break: break-all; }

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 100%; max-height: 90vh; border-radius: 8px; }

/* ---------- 认证 ---------- */
.auth-wrap { display: flex; justify-content: center; padding: 30px 0; }
.auth-card { width: 100%; max-width: 400px; }
.auth-card h1 { text-align: center; margin-bottom: 6px; }
.auth-card .muted { text-align: center; margin-top: 12px; }

/* ---------- 论坛详情 ---------- */
.thread-main { margin-bottom: 24px; }
.thread-head { border-bottom: 1px solid var(--border); padding-bottom: 12px; margin-bottom: 14px; }
.thread-head h1 { font-size: 20px; margin-bottom: 8px; }
.reply { padding: 16px 18px; margin-bottom: 12px; }
.reply-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.reply-head strong { font-size: 14px; }
.reply-head form { margin-left: auto; }
.reply-content { font-size: 14px; white-space: pre-wrap; word-break: break-word; }

/* ---------- 管理后台 ---------- */
.admin-nav { display: flex; gap: 8px; }
.admin-nav a {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 13px;
}
.admin-nav a.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.stat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 28px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}
.stat-card span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.stat-card strong { font-size: 26px; color: var(--primary); }
.table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; font-size: 14px; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table th { background: #f9fafb; font-size: 13px; color: var(--muted); font-weight: 600; }
.table tr:last-child td { border-bottom: none; }
.table form { display: inline; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 24px 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
.site-footer p + p { margin-top: 4px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .post-grid { grid-template-columns: repeat(3, 1fr); }
  .cat-grid { grid-template-columns: repeat(3, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  .nav { display: none; }
  .post-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 24px; }
  .header-inner { gap: 10px; }
  .header-actions .btn-ghost { display: none; }
}