:root {
  --primary: #1a73e8;
  --primary-hover: #1557b0;
  --bg: #f4f6fa;
  --sidebar: #1f2937;
  --sidebar-hover: #374151;
  --border: #e5e7eb;
  --text: #1f2937;
  --text-soft: #6b7280;
  --success: #52c41a;
  --warn: #fa8c16;
  --danger: #ff4d4f;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); background: var(--bg); }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: 14px; }

/* ============== 登录页 ============== */
.login-body {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1a73e8 0%, #6366f1 100%);
}
.login-card {
  background: #fff; border-radius: 16px; padding: 40px 36px;
  width: 400px; box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}
.login-title { font-size: 22px; font-weight: 700; text-align: center; margin-bottom: 4px; }
.login-sub { color: var(--text-soft); text-align: center; margin-bottom: 24px; }
.login-card label { display: block; margin-bottom: 16px; color: var(--text-soft); font-size: 13px; }
.login-card label input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px;
  margin-top: 6px; font-size: 14px; outline: none; transition: border-color 0.2s;
}
.login-card label input:focus { border-color: var(--primary); }
.login-btn {
  width: 100%; padding: 12px; background: var(--primary); color: #fff; border: none;
  border-radius: 8px; font-size: 16px; font-weight: 600; margin-top: 8px;
}
.login-btn:hover { background: var(--primary-hover); }
.login-tip { color: var(--danger); font-size: 13px; min-height: 20px; margin-top: 8px; text-align: center; }
.login-accounts { margin-top: 16px; font-size: 12px; color: var(--text-soft); line-height: 1.7; background: #f9fafb; padding: 10px 12px; border-radius: 6px; }

/* ============== 管理台布局 ============== */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; background: var(--sidebar); color: #cbd5e1; flex-shrink: 0;
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
}
.logo { padding: 22px 20px; font-size: 18px; font-weight: 700; color: #fff; border-bottom: 1px solid #374151; }
.sidebar nav { padding: 12px 0; flex: 1; }
.nav-item { display: block; padding: 12px 20px; color: #cbd5e1; font-size: 14px; transition: all 0.15s; }
.nav-item:hover { background: var(--sidebar-hover); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; border-left: 3px solid #fff; padding-left: 17px; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid #374151; }
.user-info { margin-bottom: 10px; font-size: 13px; line-height: 1.7; }
.ui-name { color: #fff; font-weight: 600; display: block; }
.ui-role { color: #94a3b8; font-size: 12px; }
.logout-btn { width: 100%; padding: 8px; background: transparent; border: 1px solid #475569; color: #cbd5e1; border-radius: 6px; font-size: 13px; }
.logout-btn:hover { background: #ef4444; border-color: #ef4444; color: #fff; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar { height: 56px; background: #fff; border-bottom: 1px solid var(--border); display: flex; align-items: center; padding: 0 24px; }
.crumb { font-size: 14px; color: var(--text-soft); }
.content { padding: 24px; flex: 1; }

/* ============== 组件 ============== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { background: #fff; border-radius: 12px; padding: 20px; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.stat-label { color: var(--text-soft); font-size: 13px; }
.stat-value { font-size: 26px; font-weight: 700; margin-top: 8px; color: var(--text); }

.panel { background: #fff; border-radius: 12px; box-shadow: 0 1px 3px rgba(0,0,0,0.05); margin-bottom: 20px; }
.panel-header { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 600; display: flex; align-items: center; justify-content: space-between; }
.panel-body { padding: 16px 20px; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.toolbar input, .toolbar select { padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; outline: none; }
.btn { padding: 8px 16px; border-radius: 6px; font-size: 14px; border: 1px solid transparent; display: inline-block; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: #eff6ff; }
.btn-danger { background: #fff; color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

.status-select {
  padding: 4px 8px;
  font-size: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  outline: none;
  cursor: pointer;
}
.status-select:hover { border-color: var(--primary); }

.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 12px 10px; border-bottom: 1px solid var(--border); text-align: left; }
.table th { background: #f9fafb; color: var(--text-soft); font-weight: 600; }
.table tr:hover td { background: #fafbfc; }
.table .actions { display: flex; gap: 8px; flex-wrap: wrap; }

.tag { display: inline-block; padding: 2px 10px; border-radius: 10px; font-size: 12px; }
.tag-blue { background: #eff6ff; color: #1d4ed8; }
.tag-green { background: #ecfdf5; color: #047857; }
.tag-orange { background: #fff7ed; color: #c2410c; }
.tag-red { background: #fef2f2; color: #b91c1c; }
.tag-gray { background: #f3f4f6; color: #4b5563; }

/* ============== 表单 ============== */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px 24px; }
.form-group { display: flex; flex-direction: column; }
.form-group label { color: var(--text-soft); font-size: 13px; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  padding: 9px 12px; border: 1px solid var(--border); border-radius: 6px; outline: none; background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 90px; }
.form-section { margin-bottom: 24px; }
.form-section-title { font-weight: 600; margin-bottom: 14px; padding-left: 10px; border-left: 3px solid var(--primary); }

.image-uploader {
  border: 2px dashed #cbd5e1; border-radius: 8px; padding: 20px; min-height: 160px;
  display: flex; flex-wrap: wrap; gap: 10px; align-content: flex-start;
}
.image-uploader:hover { border-color: var(--primary); }
.upload-label {
  width: 100px; height: 100px; border: 1px dashed var(--border); border-radius: 6px;
  display: flex; align-items: center; justify-content: center; font-size: 28px; color: var(--text-soft); cursor: pointer;
}
.upload-label:hover { background: #f9fafb; }
.image-item { position: relative; width: 100px; height: 100px; border-radius: 6px; overflow: hidden; }
.image-item img { width: 100%; height: 100%; object-fit: cover; }
.image-item .rm { position: absolute; top: 2px; right: 2px; background: rgba(0,0,0,0.5); color: #fff; border-radius: 50%; width: 22px; height: 22px; display: flex; align-items: center; justify-content: center; font-size: 14px; cursor: pointer; }

.checkbox-group { display: flex; flex-wrap: wrap; gap: 10px 16px; }
.checkbox-group label { display: inline-flex; align-items: center; gap: 4px; color: var(--text); }
.tags-editor { min-height: 40px; padding: 8px; border: 1px solid var(--border); border-radius: 6px; }
.tag-chip { display: inline-flex; align-items: center; gap: 4px; background: #eef2ff; color: #4338ca; padding: 2px 8px; border-radius: 12px; margin: 2px 4px; font-size: 12px; }
.tag-chip span { cursor: pointer; }

.tags-wrap { display: flex; flex-direction: column; gap: 10px; }
.tags-display {
  min-height: 40px; padding: 8px; border: 1px solid var(--border); border-radius: 6px;
  background: #fff;
}
.tags-empty { color: var(--text-soft); font-size: 12px; padding: 4px 6px; }
.tags-input-row { display: flex; gap: 8px; }
.tag-input {
  flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 14px; outline: none; transition: border-color 0.2s;
}
.tag-input:focus { border-color: var(--primary); }
.btn-sm { padding: 6px 16px; font-size: 13px; }

.tabs { display: flex; gap: 2px; border-bottom: 2px solid var(--border); margin-bottom: 16px; }
.tab { padding: 10px 18px; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; color: var(--text-soft); font-size: 14px; }
.tab.active { border-color: var(--primary); color: var(--primary); font-weight: 600; }

.empty { padding: 60px 0; text-align: center; color: var(--text-soft); }

/* Modal */
.modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 99; display: none; align-items: center; justify-content: center; }
.modal-mask.show { display: flex; }
.modal { background: #fff; border-radius: 10px; width: 480px; max-width: 90vw; overflow: hidden; }
.modal-header { padding: 14px 18px; border-bottom: 1px solid var(--border); font-weight: 600; }
.modal-body { padding: 18px; max-height: 60vh; overflow: auto; }
.modal-footer { padding: 12px 18px; border-top: 1px solid var(--border); display: flex; gap: 10px; justify-content: flex-end; }

.pagination { margin-top: 16px; display: flex; justify-content: flex-end; align-items: center; gap: 8px; color: var(--text-soft); font-size: 13px; }

/* ============== 表单底部固定操作栏 ============== */
.form-actions-bar {
  position: fixed; bottom: 0; left: 220px; right: 0;
  background: #fff; border-top: 1px solid var(--border);
  padding: 14px 24px; display: flex; align-items: center;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.06); z-index: 50;
}