:root {
  --blue: #1677ff;
  --blue-dark: #0958d9;
  --blue-light: #e6f4ff;
  --bg: #f5f8ff;
  --border: #e8eef7;
  --text: #1f2a44;
  --muted: #8a96ad;
  --danger: #ff4d4f;
  --green: #52c41a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}
.hidden { display: none !important; }

/* ---------- 登录页 ---------- */
.login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1677ff 0%, #4096ff 100%);
}
.login-card {
  width: 340px;
  background: #fff;
  border-radius: 16px;
  padding: 36px 28px;
  box-shadow: 0 12px 40px rgba(0,0,0,.18);
  text-align: center;
}
.login-logo { font-size: 46px; }
.login-card h1 { font-size: 22px; margin-top: 8px; }
.login-sub { color: var(--muted); margin: 4px 0 22px; }
#login-form { display: flex; flex-direction: column; gap: 12px; }
#login-form input {
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 14px;
  font-size: 14px;
  outline: none;
}
#login-form input:focus { border-color: var(--blue); }
#login-btn {
  height: 44px;
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  margin-top: 4px;
}
#login-btn:hover { background: var(--blue-dark); }
.login-error { color: var(--danger); min-height: 18px; font-size: 13px; }
.login-tip { color: var(--muted); font-size: 12px; margin-top: 14px; }

/* ---------- 主框架 ---------- */
.topbar {
  height: 56px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
}
.topbar-title { font-size: 16px; font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.admin-badge { color: var(--muted); font-size: 13px; }
.btn-logout {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 6px;
  padding: 6px 14px;
  cursor: pointer;
}
.btn-logout:hover { border-color: var(--blue); color: var(--blue); }

.tabs {
  display: flex;
  gap: 6px;
  padding: 12px 22px 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.tab {
  border: none;
  background: transparent;
  padding: 10px 18px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}
.tab.active { color: var(--blue); border-bottom-color: var(--blue); font-weight: 600; }

.content { padding: 22px; max-width: 980px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }
.panel h2 { font-size: 18px; margin-bottom: 6px; }
.panel-desc { color: var(--muted); margin-bottom: 18px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

/* ---------- 表单 ---------- */
.form-grid {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-grid label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.form-grid label.full { grid-column: 1 / -1; }
.form-grid input, .form-grid textarea, .form-grid select {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--text);
  outline: none;
  font-family: inherit;
}
.form-grid input:focus, .form-grid textarea:focus, .form-grid select:focus { border-color: var(--blue); }
.form-actions { display: flex; align-items: center; gap: 12px; }
.form-msg { color: var(--green); font-size: 13px; }

/* ---------- 按钮 ---------- */
.btn-primary {
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 20px;
  font-size: 14px;
  cursor: pointer;
}
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 14px;
  cursor: pointer;
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

/* ---------- 表格 ---------- */
.table-wrap { background: #fff; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.data-table th { background: var(--blue-light); color: var(--blue-dark); font-weight: 600; }
.data-table tr:last-child td { border-bottom: none; }
.tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue-dark);
  border-radius: 4px;
  padding: 2px 8px;
  margin: 2px 4px 2px 0;
  font-size: 12px;
}
.row-actions button {
  border: none;
  background: transparent;
  color: var(--blue);
  cursor: pointer;
  margin-right: 10px;
  font-size: 13px;
}
.row-actions .del { color: var(--danger); }
.empty-tip { padding: 24px; text-align: center; color: var(--muted); }

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal-card {
  width: 460px;
  max-width: 92vw;
  background: #fff;
  border-radius: 14px;
  padding: 24px;
}
.modal-card h3 { margin-bottom: 16px; }