/* ============================================================
   上网入口 - 全局样式
   前台导航页 + 登录/注册 + 后台管理，单一样式表
   ============================================================ */

:root {
  /* --primary 由后台「外观设置」注入，其余衍生色基于它自动计算 */
  --primary: #2563eb;
  --primary-dark: color-mix(in srgb, var(--primary) 78%, #000);
  --primary-light: color-mix(in srgb, var(--primary) 12%, #fff);
  --bg: #f3f5f9;
  --card: #ffffff;
  --border: #e5e9f0;
  --text: #1f2937;
  --muted: #6b7280;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(17, 24, 39, .06);
  --shadow-lg: 0 10px 25px rgba(17, 24, 39, .1);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 14px;
}

/* 后台「外观设置」注入的背景模式 */
body.bg-default { background: var(--bg); }
body.bg-image {
  background-image: var(--bg-img-url);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
body.bg-image::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--bg-mask, rgba(255, 255, 255, .35));
}

/* 非默认背景模式下，顶部/底部跟随背景：
   纯色 = 与页面同色；渐变/图片 = 半透明白 + 毛玻璃 */
body.bg-color .site-header,
body.bg-color .site-footer {
  background: var(--bg-custom, #f3f5f9);
  border-color: rgba(0, 0, 0, .08);
}
body.bg-gradient .site-header,
body.bg-gradient .site-footer,
body.bg-image .site-header,
body.bg-image .site-footer {
  background: rgba(255, 255, 255, .32);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-color: rgba(0, 0, 0, .08);
}

a { color: var(--primary); text-decoration: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 14px;
  padding-bottom: 14px;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}

.logo-icon { font-size: 22px; }

.search-form {
  display: flex;
  flex: 1;
  min-width: 220px;
  max-width: 460px;
}

.search-form input {
  flex: 1;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 8px 0 0 8px;
  font-size: 14px;
  background: #fff;
}

.search-form input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

.search-form button {
  padding: 9px 18px;
  border: 1px solid var(--primary);
  border-radius: 0 8px 8px 0;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}

.search-form button:hover { background: var(--primary-dark); }

.user-nav {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
  white-space: nowrap;
}

.user-nav a { color: var(--muted); font-size: 14px; }
.user-nav a:hover { color: var(--primary); }

.user-name {
  color: var(--text);
  font-weight: 600;
}

/* ---------------- 前台内容 ---------------- */
main { min-height: calc(100vh - 160px); padding-top: 24px; padding-bottom: 48px; }

.category-block { margin-bottom: 36px; }

.category-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.category-title::before {
  content: "";
  width: 4px;
  height: 18px;
  border-radius: 2px;
  background: var(--primary);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 12px;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  background: rgba(255, 255, 255, var(--card-alpha, 1));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: #c7d7f7;
}

.link-icon {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 20px;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  overflow: hidden;
}

.link-icon img { width: 100%; height: 100%; object-fit: cover; }

/* 链接图标图片（图片地址图标）：列表内小图标；卡片内由 .link-icon 撑满 */
.link-icon-img {
  width: 22px;
  height: 22px;
  object-fit: cover;
  vertical-align: middle;
  border-radius: 6px;
}
.link-icon .link-icon-img { width: 100%; height: 100%; border-radius: 0; }

/* 图标底色轮换 */
.hue-0 { background: #eff4ff; color: #2563eb; }
.hue-1 { background: #ecfdf5; color: #059669; }
.hue-2 { background: #fffbeb; color: #d97706; }
.hue-3 { background: #fef2f2; color: #dc2626; }
.hue-4 { background: #f0fdfa; color: #0d9488; }
.hue-5 { background: #fdf2f8; color: #db2777; }
.hue-6 { background: #f5f3ff; color: #7c3aed; }
.hue-7 { background: #f8fafc; color: #475569; }

.link-body { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.link-title {
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.link-desc {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.link-arrow {
  color: #cbd5e1;
  font-size: 14px;
  opacity: 0;
  transition: opacity .15s ease;
}

.link-card:hover .link-arrow { opacity: 1; color: var(--primary); }

/* ---------------- 搜索页 ---------------- */
.page-title { font-size: 20px; font-weight: 700; margin-bottom: 18px; }

.result-count { color: var(--muted); margin-bottom: 14px; }

.result-list { display: flex; flex-direction: column; gap: 10px; }

.result-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, var(--card-alpha, 1));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  box-shadow: var(--shadow);
  transition: box-shadow .15s ease, border-color .15s ease;
}

.result-item:hover { box-shadow: var(--shadow-lg); border-color: #c7d7f7; }

.result-item .link-desc em { font-style: normal; color: var(--primary); font-size: 12px; }

/* ---------------- 空状态 ---------------- */
.empty-state { text-align: center; padding: 80px 20px; color: var(--muted); }

.empty-icon { font-size: 48px; margin-bottom: 14px; }

.empty-state p { margin-bottom: 6px; }

.empty-tip { font-size: 13px; color: #9ca3af; }

/* ---------------- 登录 / 注册 ---------------- */
.auth-page { display: flex; justify-content: center; padding: 40px 20px 60px; }

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  box-shadow: var(--shadow);
}

.auth-title { font-size: 20px; font-weight: 700; margin-bottom: 20px; text-align: center; }

.auth-alt { text-align: center; margin-top: 16px; font-size: 13px; color: var(--muted); }

/* ---------------- 表单通用 ---------------- */
.form-group { margin-bottom: 16px; }

.form-group label, .form-col label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }

.form-hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

.input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .12); }

.input-sm { width: auto; padding: 6px 10px; font-size: 13px; }
.input-num { width: 70px; }
.input-pwd { width: 110px; }

select.input { appearance: auto; }

.form-inline { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.checkbox-label { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-outline { background: #fff; border-color: #d1d5db; color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-ghost { background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--primary); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }

.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
.btn-block { width: 100%; }

/* ---------------- 提示消息 ---------------- */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 18px;
  font-size: 13px;
  border: 1px solid;
}

.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.alert-error   { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }

/* ---------------- 后台布局 ---------------- */
.admin-body { background: var(--bg); }

.admin-layout { display: flex; min-height: 100vh; }

.admin-sidebar {
  flex: 0 0 220px;
  width: 220px;
  background: #111827;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.admin-brand {
  padding: 20px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid #1f2937;
}

.admin-nav { flex: 1; padding: 12px 0; }

.admin-nav a {
  display: block;
  padding: 10px 20px;
  color: #cbd5e1;
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: background .15s ease, color .15s ease;
}

.admin-nav a:hover { background: #1f2937; color: #fff; }
.admin-nav a.active { background: #1f2937; color: #fff; border-left-color: var(--primary); }

.admin-user { padding: 14px 20px; font-size: 12px; color: #6b7280; border-top: 1px solid #1f2937; }

.admin-main { flex: 1; min-width: 0; padding: 28px 32px 48px; }

.admin-container { max-width: 1100px; margin: 0 auto; }

/* ---------------- 统计卡片 ---------------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.stat-num { font-size: 26px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* ---------------- 面板 ---------------- */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.panel-title { font-size: 16px; font-weight: 700; margin-bottom: 14px; }

/* ---------------- 表格 ---------------- */
.table-scroll { overflow-x: auto; }

.table { width: 100%; border-collapse: collapse; background: #fff; font-size: 13px; }

.table th {
  text-align: left;
  padding: 10px 12px;
  background: #f9fafb;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  white-space: nowrap;
}

.table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.table tr:last-child td { border-bottom: 0; }

.table tr:hover td { background: #fafbfd; }

.cell-muted { color: var(--muted); }
.cell-title { font-weight: 600; }
.cell-sub { font-size: 12px; color: var(--muted); font-weight: 400; }
.cell-url { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cell-actions { white-space: nowrap; }

.cell-actions form { display: inline-flex; margin-right: 4px; }

/* ---------------- 文件管理 ---------------- */
.file-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--border);
  background: #fff;
  display: block;
}

.file-icon {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.file-name { font-weight: 600; word-break: break-all; }

/* ---------------- 徽章 ---------------- */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: #f3f4f6;
  color: #4b5563;
  white-space: nowrap;
}

.badge-on { background: #dcfce7; color: #166534; }
.badge-off { background: #fee2e2; color: #991b1b; }
.badge-admin { background: #dbeafe; color: #1d4ed8; }

/* ---------------- 柱状图 ---------------- */
.bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 170px;
  padding-top: 10px;
}

.bar-chart-30 { height: 200px; gap: 3px; }

.bar-item {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  height: 100%;
}

.bar {
  width: 100%;
  max-width: 40px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--primary) 55%, #fff), var(--primary));
  border-radius: 4px 4px 0 0;
  min-height: 2px;
  transition: opacity .15s ease;
}

.bar-item:hover .bar { opacity: .85; }

.bar-value { font-size: 11px; color: var(--muted); }

.bar-label { font-size: 11px; color: var(--muted); white-space: nowrap; }
.bar-label-blank { visibility: hidden; }

/* ---------------- 分类分布条 ---------------- */
.cat-stat-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.cat-stat-name { flex: 0 0 120px; font-size: 13px; font-weight: 500; }

.cat-stat-track { flex: 1; background: #f1f5f9; border-radius: 999px; height: 10px; overflow: hidden; }

.cat-stat-bar { height: 100%; background: linear-gradient(90deg, color-mix(in srgb, var(--primary) 65%, #fff), var(--primary)); border-radius: 999px; }

.cat-stat-count { flex: 0 0 auto; font-size: 12px; color: var(--muted); }

/* ---------------- 分页 ---------------- */
.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font-size: 13px;
}

.page-btn:hover { border-color: var(--primary); color: var(--primary); }

.page-info { font-size: 13px; color: var(--muted); }

/* ---------------- 页脚 ---------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  background: #fff;
}

/* ---------------- 首页副标题 ---------------- */
.site-hero { text-align: center; padding: 18px 0 26px; }

.site-tagline { font-size: 15px; color: var(--muted); }

/* ---------------- 表单网格（后台新增/编辑） ---------------- */
.form-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 14px; }
.form-row-bottom { align-items: center; justify-content: space-between; margin-bottom: 0; }
.form-col { flex: 1 1 240px; min-width: 0; }
.form-col-wide { flex: 2 1 480px; }
.form-col label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-actions { display: flex; gap: 10px; align-items: center; }
.filter-bar { margin-bottom: 14px; }

/* ---------------- 外观设置：主题色色板 ---------------- */
.swatch-group { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

.swatch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 6px 10px;
  border: 2px solid transparent;
  border-radius: 10px;
  transition: border-color .15s ease, background .15s ease;
}

.swatch:hover { border-color: #cbd5e1; }
.swatch.active { border-color: var(--primary); background: var(--primary-light); }
/* 点击选中即时高亮（纯 CSS，不依赖 JS；:has 在 2026 年主流浏览器均已支持） */
.swatch:has(input:checked) { border-color: var(--primary); background: var(--primary-light); }
.swatch:has(input:checked) .swatch-dot { box-shadow: 0 0 0 2px var(--primary); }
.swatch input { display: none; }

.swatch-dot {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(0, 0, 0, .12);
}

.swatch-dot.custom { overflow: hidden; position: relative; }
.swatch-dot.custom input[type="color"] {
  position: absolute;
  inset: -6px;
  width: 40px;
  height: 40px;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.swatch-label { font-size: 13px; color: var(--text); }

/* ---------------- 外观设置：背景 ---------------- */
.bg-mode-row { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 14px; }

.radio-label { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }

.bg-fields { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; margin-top: 6px; }
.bg-fields label { font-size: 13px; font-weight: 600; }
.bg-fields input[type="color"] {
  width: 48px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px;
  background: #fff;
  cursor: pointer;
}

.overlay-field { display: flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; }
.overlay-field input[type="range"] { width: 180px; }

/* ---------------- 外观设置：实时预览 ---------------- */
.bg-preview {
  height: 170px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #f3f5f9;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  transition: background .2s ease;
}

.bg-preview-card {
  background: rgba(255, 255, 255, .92);
  border-radius: 12px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow);
}

.bg-preview-logo { font-weight: 700; font-size: 15px; }

.bg-preview-chip {
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  transition: background .2s ease;
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 768px) {
  .header-inner { gap: 12px; }
  .search-form { order: 3; flex-basis: 100%; max-width: none; }
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; height: auto; position: static; }
  .admin-nav { display: flex; overflow-x: auto; padding: 0; }
  .admin-nav a { border-left: 0; border-bottom: 3px solid transparent; white-space: nowrap; }
  .admin-nav a.active { border-bottom-color: var(--primary); }
  .admin-main { padding: 20px 16px 40px; }
  .cat-stat-name { flex-basis: 80px; }
  .input-sm { width: auto; }
}