/* ========== 简约论坛 · 默认浅色主题 ========== */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --card-2: #f7f8fc;
  --border: #e6e9f2;
  --primary: #667eea;
  --primary-dark: #5568d3;
  --primary-light: #eef1ff;
  --accent: #667eea;
  --text: #2d3748;
  --text-bright: #1a202c;
  --muted: #8a94a6;
  --danger: #e53e3e;
  --warning: #d69e2e;
  --success: #38a169;
  --font: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 14px;
  min-height: 100vh;
}
::selection { background: var(--primary-light); color: var(--primary-dark); }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); text-decoration: underline; }
img { max-width: 100%; }

/* ========== 顶部导航 ========== */
.navbar {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar .brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar .brand:hover { text-decoration: none; color: #fff; }
.navbar .brand .logo {
  width: 30px; height: 30px;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 700;
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  color: rgba(255, 255, 255, 0.85);
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 14px;
  white-space: nowrap;
  transition: all .15s;
}
.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.18);
  text-decoration: none;
}
.nav-links a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.25);
  font-weight: 600;
}
.nav-user { display: flex; align-items: center; gap: 12px; }
.nav-user .avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; border: 2px solid rgba(255,255,255,0.5); }
.nav-user .coins {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.nav-user .nick { font-size: 13px; font-weight: 600; color: #fff; }

/* 风格切换器 */
.theme-switch {
  background: rgba(255,255,255,0.18);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
}
.theme-switch:hover { background: rgba(255,255,255,0.28); }
.theme-switch option { color: var(--text); background: var(--card); }

/* ========== 容器 ========== */
.container { max-width: 1000px; margin: 22px auto; padding: 0 16px; }
.wide { max-width: 1200px; }

/* ========== 卡片 ========== */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  padding: 20px;
  margin-bottom: 16px;
}
.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}
.btn:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border: none; }
.btn-primary:hover { color: #fff; opacity: 0.92; box-shadow: 0 4px 12px rgba(102, 126, 234, 0.35); }
.btn-danger { background: #fff; color: var(--danger); border-color: #fed7d7; }
.btn-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-success { background: #fff; color: var(--success); border-color: #c6f6d5; }
.btn-success:hover { background: var(--success); color: #fff; border-color: var(--success); }
.btn-warning { background: #fff; color: var(--warning); border-color: #feebc8; }
.btn-warning:hover { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-sm { padding: 5px 11px; font-size: 12px; }
.btn-block { display: block; width: 100%; text-align: center; }

/* ========== 表单 ========== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 13px; color: var(--text); }
.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  transition: border .15s, box-shadow .15s;
  background: #fff;
  color: var(--text);
}
.form-control::placeholder { color: #c0c6d4; }
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}
textarea.form-control { resize: vertical; min-height: 120px; }

/* ========== 提示消息 ========== */
.flash { padding: 11px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; border: 1px solid; }
.flash.success { background: #f0fff4; color: var(--success); border-color: #c6f6d5; }
.flash.error { background: #fff5f5; color: var(--danger); border-color: #fed7d7; }
.flash.warning { background: #fffff0; color: var(--warning); border-color: #feebc8; }

/* ========== 分类标签 ========== */
.cat-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.cat-tab {
  padding: 5px 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--muted);
}
.cat-tab:hover { text-decoration: none; border-color: var(--primary); color: var(--primary); }
.cat-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.badge { background: var(--primary-light); color: var(--primary-dark); padding: 2px 9px; border-radius: 10px; font-size: 12px; font-weight: 600; }
.badge-top { background: #fff0f0; color: var(--danger); }
.badge-essence { background: #fff8e6; color: var(--warning); }
.post-item .title-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ========== 帖子列表 ========== */
.post-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  transition: box-shadow .15s, border-color .15s;
}
.post-item:hover { border-color: #c7d0f0; box-shadow: 0 6px 18px rgba(102, 126, 234, 0.08); }
.post-item .avatar { width: 42px; height: 42px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.post-item .main { flex: 1; min-width: 0; }
.post-item .title { font-size: 15px; font-weight: 600; color: var(--text-bright); }
.post-item .title:hover { color: var(--primary); text-decoration: none; }
.post-item .meta { font-size: 12px; color: var(--muted); margin-top: 5px; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.post-item .meta .author-link { color: var(--muted); }
.post-item .meta .author-link:hover { color: var(--primary); }
.post-item .stats { display: flex; gap: 16px; font-size: 11px; color: var(--muted); flex-shrink: 0; }
.post-item .stats b { color: var(--primary); font-size: 15px; display: block; }

/* ========== 帖子详情 ========== */
.post-detail .post-header { margin-bottom: 14px; }
.post-detail h1 { font-size: 22px; margin-bottom: 8px; color: var(--text-bright); }
.post-detail .post-meta { color: var(--muted); font-size: 12px; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.post-detail .author { display: flex; align-items: center; gap: 10px; }
.post-detail .author .avatar { width: 32px; height: 32px; border-radius: 50%; }
.post-body { font-size: 14.5px; line-height: 1.9; padding: 16px 0; color: var(--text); }
.post-img { max-width: 100%; max-height: 560px; width: auto; height: auto; border-radius: 8px; margin: 10px 0; display: block; cursor: zoom-in; object-fit: contain; }
.post-video { max-width: 100%; max-height: 480px; border-radius: 8px; margin: 10px 0; display: block; background: #000; }
.file-link { display: inline-flex; align-items: center; gap: 6px; margin: 6px 0; padding: 5px 12px;
  background: var(--card-2); border: 1px solid var(--border); border-radius: 6px;
  color: var(--primary); text-decoration: none; font-size: 13px; transition: border-color .15s; }
.file-link:hover { border-color: var(--primary); text-decoration: none; }
.file-link .file-ico { font-style: normal; }
.post-signature { margin-top: 18px; padding-top: 12px; border-top: 1px dashed var(--border); color: var(--muted); font-size: 12px; font-style: italic; }

/* ========== 评论 ========== */
.comment-item { display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.comment-item:last-child { border-bottom: none; }
.comment-item .avatar { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.comment-item .body { flex: 1; min-width: 0; }
.comment-item .head { display: flex; align-items: center; gap: 10px; font-size: 12px; margin-bottom: 5px; flex-wrap: wrap; }
.comment-item .head .name { font-weight: 600; color: var(--primary); }
.comment-item .head .time { color: var(--muted); }
.comment-item .content { font-size: 14px; word-break: break-word; color: var(--text); }
.comment-item .del { color: var(--danger); font-size: 12px; }

/* ========== 编辑器工具栏 ========== */
.editor-toolbar {
  display: flex; gap: 6px; margin-bottom: 0; padding: 8px;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  align-items: center; flex-wrap: wrap;
}
.editor-toolbar button {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  padding: 5px 10px; font-size: 12px; cursor: pointer; color: var(--text); font-family: inherit;
}
.editor-toolbar button:hover { border-color: var(--primary); color: var(--primary); }
.editor-toolbar .upload-btn { position: relative; overflow: hidden; }
.editor-toolbar .upload-btn input { position: absolute; left: -9999px; }
#content { border-radius: 0 0 8px 8px; }
.emoji-panel {
  display: none; background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  padding: 10px; margin-top: 6px; max-height: 180px; overflow-y: auto; flex-wrap: wrap; gap: 4px;
}
.emoji-panel.show { display: flex; }
.emoji-panel span { font-size: 20px; cursor: pointer; padding: 4px; border-radius: 4px; line-height: 1; }
.emoji-panel span:hover { background: var(--primary-light); }

/* ========== 分页 ========== */
.pagination { display: flex; gap: 6px; justify-content: center; margin: 24px 0; flex-wrap: wrap; }
.pagination a, .pagination span {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--card); font-size: 13px; color: var(--text);
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ========== 个人中心 ========== */
.profile-head { display: flex; gap: 20px; align-items: center; }
.profile-head .avatar { width: 78px; height: 78px; border-radius: 50%; object-fit: cover; border: 3px solid var(--primary-light); }
.profile-head .info h2 { font-size: 21px; color: var(--text-bright); }
.profile-head .info .sig { color: var(--muted); font-size: 12px; margin-top: 4px; }
.stats-row { display: flex; gap: 24px; margin-top: 16px; flex-wrap: wrap; }
.stat { text-align: center; }
.stat .num { font-size: 22px; font-weight: 700; color: var(--primary); }
.stat .lbl { font-size: 12px; color: var(--muted); }
.space-tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.comment-snippet { margin-top: 8px; padding: 8px 12px; background: var(--card-2); border-left: 3px solid var(--primary); border-radius: 6px; font-size: 13px; color: var(--text); line-height: 1.6; }
.comment-snippet .who { color: var(--primary); font-weight: 600; margin-right: 4px; }
.checkin-box {
  background: linear-gradient(135deg, #fff7e6, #fff);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

/* ========== 后台 ========== */
.admin-layout { display: flex; min-height: calc(100vh - 56px); }
.admin-sidebar {
  width: 220px;
  background: #2d3748;
  color: #cbd5e0;
  padding: 20px 0;
  flex-shrink: 0;
}
.admin-sidebar a {
  display: block;
  padding: 11px 22px;
  color: #cbd5e0;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.admin-sidebar a:hover, .admin-sidebar a.active {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
  border-left-color: var(--primary);
}
.admin-sidebar .side-title { padding: 0 22px; font-size: 11px; color: #718096; margin: 14px 0 6px; text-transform: uppercase; letter-spacing: 1px; }
.admin-main { flex: 1; padding: 24px; }
.admin-main h1 { font-size: 20px; margin-bottom: 18px; color: var(--text-bright); }

/* ========== 表格 ========== */
.table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
.table th, .table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.table th { background: var(--card-2); font-weight: 600; color: var(--text); }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: #fafbff; }
.table .avatar-sm { width: 28px; height: 28px; border-radius: 50%; vertical-align: middle; margin-right: 6px; }

/* ========== 仪表盘卡片 ========== */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.dash-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.dash-card .num { font-size: 30px; font-weight: 700; color: var(--primary); }
.dash-card .lbl { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* ========== 空状态 ========== */
.empty { text-align: center; padding: 50px 20px; color: var(--muted); }
.empty .icon { font-size: 44px; margin-bottom: 10px; }

/* ========== 页脚 ========== */
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 30px 0; }

/* ========== 等级徽章 ========== */
.level-badge { display: inline-block; padding: 2px 8px; border-radius: 10px; color: #fff; font-size: 10px; font-weight: 700; line-height: 1.6; vertical-align: middle; }

/* ========== 导航未读角标 / Logo ========== */
.nav-badge { display: inline-block; min-width: 18px; height: 18px; line-height: 18px; padding: 0 5px; margin-left: 4px; background: var(--danger); color: #fff; border-radius: 9px; font-size: 10px; font-weight: 700; text-align: center; vertical-align: middle; }
.logo-img { height: 30px; width: auto; border-radius: 6px; margin-right: 8px; vertical-align: middle; }

/* ========== 点赞按钮 ========== */
.like-btn { display: inline-flex; align-items: center; gap: 4px; padding: 4px 11px; border: 1px solid var(--border); background: var(--card); border-radius: 20px; cursor: pointer; font-size: 12px; color: var(--muted); transition: .15s; font-family: inherit; }
.like-btn:hover { border-color: var(--primary); color: var(--primary); }
.like-btn.liked { background: #fff0f0; border-color: #fed7d7; color: var(--danger); }
.like-btn.cmt.liked { background: #f0f9ff; border-color: #bee3f8; color: #3182ce; }
.like-btn .like-icon { font-size: 13px; }
.like-btn:disabled { opacity: .5; cursor: not-allowed; }

/* ========== 评论区扩展 ========== */
.link-btn { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 12px; padding: 0; font-family: inherit; }
.link-btn:hover { color: var(--primary); }
.link-btn.danger:hover { color: var(--danger); }
.reply-to { color: var(--muted); font-size: 12px; }
.reply-to a { color: var(--primary); text-decoration: none; }
.comment-item .name { font-weight: 600; color: var(--primary); text-decoration: none; }
.comment-item .name:hover { color: var(--primary-dark); }

/* ========== 消息列表 ========== */
.msg-item { display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--border); align-items: flex-start; }
.msg-item:last-child { border-bottom: none; }
.msg-item .avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.msg-item .body { flex: 1; min-width: 0; }
.msg-item .line1 { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.msg-item .icon { font-size: 14px; }
.msg-item .name { font-weight: 600; color: var(--primary); text-decoration: none; }
.msg-item .name:hover { color: var(--primary-dark); }
.msg-item .action { color: var(--muted); font-size: 13px; }
.msg-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--danger); display: inline-block; }
.msg-item .ctx { color: var(--muted); font-size: 12px; margin-top: 4px; }
.msg-item .time { color: var(--muted); font-size: 11px; margin-top: 4px; }
.msg-item.unread { background: #fafbff; }

/* ========== 响应式 ========== */
@media (max-width: 720px) {
  .navbar { padding: 0 10px; gap: 6px; }
  .nav-links { gap: 2px; flex-shrink: 0; }
  .nav-links a { padding: 6px 8px; font-size: 13px; }
  .nav-user { gap: 8px; }
  .nav-user .nick { display: none; }
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; display: flex; flex-wrap: wrap; padding: 8px; }
  .admin-sidebar a { padding: 8px 12px; border-left: none; border-bottom: 3px solid transparent; }
  .admin-sidebar a:hover, .admin-sidebar a.active { border-left: none; border-bottom-color: var(--primary); }
  .admin-sidebar .side-title { display: none; }
  .post-item { flex-direction: column; align-items: flex-start; }
  .post-item .stats { width: 100%; justify-content: flex-start; }
}

/* ========== 图片灯箱 ========== */
.lb-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.92); z-index: 9999;
  display: none; align-items: center; justify-content: center; }
.lb-stage { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.lb-view { max-width: none; max-height: none; user-select: none; -webkit-user-drag: none;
  transform-origin: center center; box-shadow: 0 8px 40px rgba(0,0,0,.6); border-radius: 4px; }
.lb-close, .lb-prev, .lb-next { position: absolute; z-index: 10000; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25); color: #fff; border-radius: 50%; width: 40px; height: 40px;
  font-size: 22px; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background .15s; font-family: inherit; }
.lb-close:hover, .lb-prev:hover, .lb-next:hover { background: rgba(255,255,255,.3); }
.lb-close { top: 16px; right: 16px; }
.lb-prev { left: 16px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 16px; top: 50%; transform: translateY(-50%); }
.lb-counter { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 10000;
  color: rgba(255,255,255,.85); font-size: 13px; background: rgba(0,0,0,.4); padding: 4px 12px; border-radius: 12px; }

/* ========== 所见即所得编辑器 ========== */
.editor-content { min-height: 180px; max-height: 520px; overflow-y: auto; padding: 12px;
  background: var(--card); border: 1px solid var(--border); border-radius: 0 0 8px 8px;
  font-size: 14.5px; line-height: 1.9; color: var(--text); outline: none; word-break: break-word; }
.editor-content.is-empty::before { content: attr(data-placeholder); color: var(--muted); pointer-events: none; }
.editor-content img { max-width: 100%; max-height: 560px; height: auto; cursor: pointer; object-fit: contain; }
.editor-content img.selected { outline: 2px solid var(--primary); outline-offset: 2px; }
.editor-content video { max-width: 100%; }
.img-size-bar { position: fixed; display: none; background: var(--card); border: 1px solid var(--border);
  border-radius: 6px; padding: 3px; box-shadow: 0 2px 8px rgba(0,0,0,.15); z-index: 100; gap: 2px; }
.img-size-bar.show { display: flex; }
.img-size-bar button { background: var(--card-2); border: 1px solid var(--border); border-radius: 4px;
  padding: 3px 8px; font-size: 12px; cursor: pointer; color: var(--text); font-family: inherit; }
.img-size-bar button:hover { border-color: var(--primary); color: var(--primary); }
.img-size-bar .del { color: var(--danger); }
.img-handle { position: fixed; width: 10px; height: 10px; background: var(--primary);
  border: 1px solid #fff; border-radius: 2px; z-index: 101; display: none; }
.img-handle.show { display: block; }

/* ========== 跑马灯公告 ========== */
.notice-bar { overflow: hidden; white-space: nowrap; background: var(--primary); color: #fff;
  font-size: 13px; padding: 8px 0; position: relative; }
.notice-track { display: inline-block; will-change: transform; }
.notice-text { display: inline-block; }