/* ============================================================
   防伪系统 · 后台管理样式 · 响应式美化版
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:       #4f46e5;
  --primary-light: #ede9fe;
  --primary-dark:  #3730a3;
  --success:       #10b981;
  --warning:       #f59e0b;
  --danger:        #ef4444;
  --info:          #3b82f6;
  --bg:            #f8f9fc;
  --sidebar-w:     240px;
  --sidebar-bg:    #1e1b4b;
  --sidebar-hover: #2d2a6e;
  --sidebar-cl:    #a5b4fc;
  --sidebar-ac:    #818cf8;
  --text:          #1e293b;
  --text-muted:    #94a3b8;
  --border:        #e2e8f0;
  --card-bg:       #ffffff;
  --radius-sm:     6px;
  --radius:        10px;
  --radius-lg:     14px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow:        0 4px 16px rgba(0,0,0,.07);
  --shadow-lg:     0 8px 32px rgba(0,0,0,.12);
  --transition:    .2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Segoe UI', sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* ── 滚动条美化 ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ============================================================
   登录页
   ============================================================ */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4f46e5 100%);
}
.login-box {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  width: 400px;
  max-width: 92vw;
  box-shadow: var(--shadow-lg);
}
.login-logo {
  text-align: center;
  margin-bottom: 32px;
}
.login-logo h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -.3px;
}
.login-sub {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 4px;
}

/* ============================================================
   整体布局
   ============================================================ */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ── 遮罩层（移动端） ────────────────────────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 99;
}
.sidebar-overlay.show { display: block; }

/* ── 侧边栏 ──────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  transition: transform var(--transition);
}
.sidebar-logo {
  padding: 22px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 32px; height: 32px;
  background: var(--primary);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}
.logo-text {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.2px;
}
.sidebar-nav { flex: 1; padding: 10px 0; }
.nav-group-label {
  font-size: 10px;
  color: rgba(255,255,255,.3);
  padding: 14px 20px 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--sidebar-cl);
  text-decoration: none;
  transition: all var(--transition);
  font-size: 13.5px;
  border-left: 3px solid transparent;
  margin: 1px 0;
}
.nav-item .icon { font-size: 15px; width: 20px; text-align: center; flex-shrink: 0; }
.nav-item:hover { color: #fff; background: var(--sidebar-hover); }
.nav-item.active {
  color: #fff;
  background: rgba(129,140,248,.15);
  border-left-color: var(--sidebar-ac);
}
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,.07);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.sidebar-footer span { color: var(--sidebar-cl); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.btn-logout {
  color: #f87171;
  font-size: 12px;
  cursor: pointer;
  background: none;
  border: none;
  white-space: nowrap;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.btn-logout:hover { background: rgba(248,113,113,.15); }

/* ── 主内容区 ────────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
}

/* ── 顶栏 ────────────────────────────────────────────────── */
.topbar {
  background: var(--card-bg);
  padding: 0 24px;
  height: 58px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 20px;
  line-height: 1;
  transition: background var(--transition);
}
.menu-toggle:hover { background: var(--bg); }
.page-title { font-size: 15px; font-weight: 600; color: var(--text); }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.topbar-user {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.topbar-avatar {
  width: 30px; height: 30px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--primary); font-weight: 600;
}

.content-body { padding: 20px 24px; flex: 1; }

/* ============================================================
   卡片
   ============================================================ */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  overflow: hidden;
}
.card-header {
  padding: 14px 18px;
  font-weight: 600;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  background: #fafbff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-body { padding: 18px; }

/* ============================================================
   表格
   ============================================================ */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 600px;
}
.table th, .table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}
.table th {
  background: #f8f9fc;
  font-weight: 600;
  color: #64748b;
  white-space: nowrap;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .3px;
}
.table-sm th, .table-sm td { padding: 8px 12px; }
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: #fafbff; }
.table .empty { text-align: center; color: var(--text-muted); padding: 40px; font-size: 13px; }
.thumb { width: 44px; height: 44px; object-fit: cover; border-radius: var(--radius-sm); }
.no-img {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  background: var(--bg); border-radius: var(--radius-sm);
  font-size: 10px; color: var(--text-muted);
  border: 1px dashed var(--border);
}

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); box-shadow: 0 4px 12px rgba(79,70,229,.3); }
.btn-default { background: #fff; color: #475569; border-color: var(--border); }
.btn-default:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { background: #059669; }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-warning:hover { background: #d97706; }
.btn-danger  { background: var(--danger);  color: #fff; border-color: var(--danger); }
.btn-danger:hover  { background: #dc2626; }
.btn-sm  { padding: 5px 11px; font-size: 12px; }
.btn-xs  { padding: 3px 8px;  font-size: 11px; }
.btn-block { width: 100%; }
.action-btns { display: flex; gap: 4px; flex-wrap: wrap; }

/* ============================================================
   表单
   ============================================================ */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 13px;
  color: #475569;
}
.form-group label.required::after { content: ' *'; color: var(--danger); }
.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  transition: border var(--transition), box-shadow var(--transition);
  outline: none;
  background: #fff;
  color: var(--text);
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.1);
}
.form-control::placeholder { color: #cbd5e1; }
select.form-control { height: 38px; cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 90px; line-height: 1.6; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 150px; }
.col-2 { flex: 0 0 calc(16.66% - 8px) !important; min-width: 100px !important; }
.col-4 { flex: 0 0 calc(33.33% - 8px) !important; }
.col-6 { flex: 0 0 calc(50%    - 8px) !important; }
.form-actions { display: flex; gap: 10px; padding-top: 4px; flex-wrap: wrap; }
.form-page .card { margin-bottom: 16px; }
.extra-row { display: flex; gap: 8px; margin-bottom: 8px; align-items: center; }
.text-muted { color: var(--text-muted); font-size: 12px; }
.radio-group label { cursor: pointer; display: inline-flex; align-items: center; gap: 5px; }

/* ============================================================
   工具栏 / 筛选
   ============================================================ */
.toolbar {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.filter-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  flex: 1;
}
.filter-form .form-control { width: auto; min-width: 110px; height: 36px; padding: 6px 10px; }
.batch-bar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ============================================================
   统计卡片
   ============================================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 18px 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-card.highlight { border-top-color: var(--primary); }
.stat-card.warn      { border-top-color: var(--warning); }
.stat-card.danger    { border-top-color: var(--danger);  }
.stat-card.success   { border-top-color: var(--success); }
.stat-icon { font-size: 22px; margin-bottom: 8px; }
.stat-num  { font-size: 26px; font-weight: 700; color: var(--text); letter-spacing: -.5px; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 3px; }

/* ============================================================
   徽标
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2px;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger  { background: #fee2e2; color: #991b1b; }
.badge-default { background: #f1f5f9; color: #475569; }
.badge-info    { background: #dbeafe; color: #1e40af; }

/* ============================================================
   提示 / 告警
   ============================================================ */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 13px;
  border-left: 4px solid;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.alert-success { background: #f0fdf4; border-color: var(--success); color: #166534; }
.alert-danger  { background: #fef2f2; border-color: var(--danger);  color: #991b1b; }
.alert-warning { background: #fffbeb; border-color: var(--warning); color: #92400e; }
.alert-info    { background: #eff6ff; border-color: var(--info);    color: #1e40af; }

/* ============================================================
   分页
   ============================================================ */
.pagination { display: flex; align-items: center; gap: 6px; margin-top: 16px; flex-wrap: wrap; }
.pagination-list { display: flex; gap: 4px; list-style: none; flex-wrap: wrap; }
.pagination-list li a,
.pagination-list li span {
  display: flex; align-items: center; justify-content: center;
  min-width: 32px; height: 32px; padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  transition: all var(--transition);
}
.pagination-list li.active a { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination-list li a:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.pagination-info { font-size: 12px; color: var(--text-muted); }

/* ============================================================
   双列布局
   ============================================================ */
.row-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ============================================================
   媒体网格
   ============================================================ */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.media-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.media-item:hover { box-shadow: var(--shadow); }
.media-item img { width: 100%; height: 120px; object-fit: cover; display: block; }
.media-video-thumb {
  height: 120px;
  background: #1e1b4b;
  color: #a5b4fc;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  font-size: 28px;
}
.media-info { padding: 10px; }
.media-name { font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-bottom: 3px; }
.media-size { font-size: 11px; color: var(--text-muted); margin-bottom: 8px; }
.media-actions { display: flex; gap: 4px; flex-wrap: wrap; }

/* ============================================================
   弹窗
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(15,23,42,.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 999;
  backdrop-filter: blur(2px);
}
.modal-box {
  background: #fff;
  border-radius: var(--radius-lg);
  width: 440px; max-width: 95vw;
  box-shadow: var(--shadow-lg);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity:0; transform:scale(.96) translateY(8px); } to { opacity:1; transform:none; } }
.modal-header {
  padding: 18px 20px 14px;
  font-weight: 600;
  font-size: 15px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-muted); line-height: 1; padding: 2px; border-radius: 4px; }
.modal-close:hover { background: var(--bg); }
.modal-body { padding: 20px; }
.modal-footer { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }

/* ============================================================
   进度条
   ============================================================ */
.progress-bar { background: #e2e8f0; border-radius: 4px; height: 6px; overflow: hidden; margin-bottom: 6px; }
#progressFill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--sidebar-ac)); border-radius: 4px; transition: width .3s; }

/* ============================================================
   图片预览
   ============================================================ */
.img-preview { margin-bottom: 10px; }
.img-preview img, .img-preview-list img {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.img-preview-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }

/* ============================================================
   表格信息样式
   ============================================================ */
.table-info th { width: 120px; color: #64748b; background: #f8f9fc; font-weight: 500; }

/* ============================================================
   代码块
   ============================================================ */
code {
  background: #f1f5f9;
  padding: 2px 7px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  color: var(--primary);
}

/* ============================================================
   响应式 · 平板
   ============================================================ */
@media (max-width: 1024px) {
  .row-2col { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .col-2 { flex: 0 0 calc(33.33% - 8px) !important; }
}

/* ============================================================
   响应式 · 手机端
   ============================================================ */
@media (max-width: 768px) {
  :root { --sidebar-w: 240px; }

  /* 侧边栏默认隐藏，滑出 */
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }

  /* 主内容占满 */
  .main-content { margin-left: 0; }

  /* 显示汉堡按钮 */
  .menu-toggle { display: flex; }

  /* 顶栏 */
  .topbar { padding: 0 14px; }
  .content-body { padding: 14px; }

  /* 表格横向滚动 */
  .card { overflow-x: auto; }
  .table { min-width: 500px; }

  /* 筛选栏竖排 */
  .filter-form { flex-direction: column; align-items: stretch; }
  .filter-form .form-control { width: 100%; min-width: unset; }
  .toolbar { flex-direction: column; align-items: stretch; }

  /* 表单列全宽 */
  .form-row { flex-direction: column; gap: 0; }
  .form-row .form-group,
  .col-2, .col-4, .col-6 { flex: 1 1 100% !important; min-width: unset !important; }

  /* 统计卡片 */
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-num { font-size: 22px; }

  /* 媒体网格 */
  .media-grid { grid-template-columns: repeat(2, 1fr); }

  /* 操作按钮 */
  .action-btns { gap: 3px; }
  .btn-sm { padding: 4px 8px; font-size: 11px; }

  /* 分页 */
  .pagination { justify-content: center; }

  /* 弹窗 */
  .modal-box { width: 95vw; }
}

@media (max-width: 400px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .media-grid { grid-template-columns: 1fr 1fr; }
  .login-box { padding: 28px 20px; }
}