/* ========== 全局基础 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #4e6ef2;
  --primary-dark: #3b5bdb;
  --danger: #e03131;
  --success: #2f9e44;
  --text: #333;
  --text-light: #868e96;
  --border: #e9ecef;
  --bg: #f1f3f5;
  --sidebar-bg: #1e293b;
  --sidebar-hover: #334155;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
}

a { text-decoration: none; color: var(--primary); }
a:hover { opacity: 0.85; }

/* ========== 登录页 ========== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #4e6ef2 100%);
  padding: 20px;
}

.login-card {
  width: 400px;
  max-width: 100%;
  background: #fff;
  border-radius: 16px;
  padding: 40px 36px 32px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.login-logo {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), #845ef7);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 30px;
  font-weight: 700;
}

.login-card h1 {
  text-align: center;
  font-size: 22px;
  margin-bottom: 4px;
  color: #212529;
}

.login-sub {
  text-align: center;
  color: var(--text-light);
  font-size: 13px;
  margin-bottom: 28px;
}

.login-alert {
  background: #fff5f5;
  border: 1px solid #ffc9c9;
  color: #c92a2a;
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  text-align: center;
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: #495057;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #ced4da;
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
  color: #212529;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(78, 110, 242, 0.15);
}

textarea.form-control { resize: vertical; min-height: 90px; }

.btn {
  display: inline-block;
  padding: 9px 18px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s, transform 0.05s;
  line-height: 1.4;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
}
.btn-primary:hover { opacity: 0.92; }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { opacity: 0.88; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover { background: #f1f3f5; }

.btn-block { width: 100%; padding: 12px; font-size: 15px; }

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

.sidebar {
  width: 220px;
  background: var(--sidebar-bg);
  color: #cbd5e1;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  padding: 20px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 16px;
  font-weight: 600;
}

.sidebar-brand .logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), #845ef7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #fff;
}

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

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: #cbd5e1;
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: all 0.15s;
}

.sidebar-nav a:hover { background: var(--sidebar-hover); color: #fff; }

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

.sidebar-nav .ico { width: 18px; text-align: center; font-size: 15px; }

.sidebar-foot { padding: 16px 20px; border-top: 1px solid rgba(255, 255, 255, 0.08); }
.sidebar-foot a { color: #f1f3f5; font-size: 13px; }

.main { flex: 1; margin-left: 220px; display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  background: #fff;
  height: 58px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-title { font-size: 16px; font-weight: 600; color: #212529; }

.topbar-right { display: flex; align-items: center; gap: 14px; }
.topbar-user { color: #495057; font-size: 13px; }
.topbar-user b { color: #212529; }

.content { flex: 1; padding: 24px; }

.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 20px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.card-head h3 { font-size: 16px; color: #212529; }

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

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

.table th {
  background: #f8f9fa;
  color: #495057;
  font-weight: 600;
  text-align: left;
  padding: 11px 12px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

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

.table tbody tr:hover { background: #f8f9fa; }

.table .thumb {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}

.table .empty-tip { text-align: center; color: var(--text-light); padding: 36px 0; }

/* 徽标 */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 12px;
  background: #e7f5ff;
  color: #1971c2;
}

/* 操作按钮组 */
.op-group a, .op-group form { display: inline-block; margin-right: 4px; vertical-align: middle; }
.op-link {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-block;
}
.op-link.edit { background: #e7f5ff; color: #1971c2; }
.op-link.del { background: #fff5f5; color: var(--danger); }
.op-link:hover { opacity: 0.85; }

/* ========== 分页 ========== */
.pagination {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.pagination a, .pagination .current, .pagination .disabled {
  min-width: 32px;
  height: 32px;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: #495057;
  font-size: 13px;
}

.pagination a:hover { border-color: var(--primary); color: var(--primary); }

.pagination .current {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}

.pagination .disabled { color: #ced4da; background: #f8f9fa; cursor: not-allowed; }
.pagination .page-dots { color: var(--text-light); }
.pagination .page-info { color: var(--text-light); font-size: 13px; margin-left: 8px; }

/* ========== 提示条 ========== */
.alert {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
}
.alert-error { background: #fff5f5; border: 1px solid #ffc9c9; color: #c92a2a; }
.alert-success { background: #ebfbee; border: 1px solid #b2f2bb; color: #2b8a3e; }

/* ========== 空状态 ========== */
.empty { text-align: center; padding: 40px 0; color: var(--text-light); }

/* ========== 表单页（独立页） ========== */
.form-page {
  min-height: 100vh;
  background: var(--bg);
  padding: 32px 20px;
  display: flex;
  justify-content: center;
}

.form-card {
  width: 640px;
  max-width: 100%;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px 30px;
}

.form-card .card-head { margin-bottom: 22px; }

.preview-box { margin-bottom: 14px; }
.preview-box img {
  max-width: 200px;
  max-height: 200px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}
.preview-tip { color: var(--text-light); font-size: 12px; margin-top: 6px; }

.form-actions { display: flex; gap: 10px; margin-top: 24px; }

.upload-tip { font-size: 12px; color: var(--text-light); margin-top: 6px; }

/* ========== 上传进度条 ========== */
.progress-wrap { margin: 14px 0 4px; display: none; }
.progress-bar {
  height: 8px;
  background: #e9ecef;
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--primary), #845ef7);
  border-radius: 4px;
  transition: width 0.2s ease;
}
.progress-text {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
  text-align: right;
}