* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background: #f0f4f8;
  color: #1a1a2e;
  line-height: 1.6;
}
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.auth-card {
  background: #fff;
  padding: 2.75rem 2.5rem 2rem;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.18);
  width: 100%;
  max-width: 420px;
}
.auth-card h1 { font-size: 1.6rem; text-align: center; margin-bottom: 0.35rem; font-weight: 700; letter-spacing: 0.02em; }
.subtitle { text-align: center; color: #888; margin-bottom: 2rem; font-size: 0.95rem; }
.auth-form { display: flex; flex-direction: column; gap: 1.25rem; }
.auth-field { display: flex; flex-direction: column; gap: 0.5rem; }
.auth-label { font-size: 0.9rem; font-weight: 600; color: #444; }
.auth-form input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.auth-form input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102,126,234,0.15);
}
.auth-form input::placeholder { color: #bbb; }
.auth-submit {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.8rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  letter-spacing: 0.05em;
}
.auth-error { text-align: center; min-height: 1.35rem; }
.hint { text-align: center; color: #aaa; font-size: 0.82rem; margin-top: 1.25rem; line-height: 1.5; }
.auth-footer { text-align: center; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid #f0f0f0; }
.auth-panel { max-width: 420px; margin: 3rem auto !important; padding: 2.5rem !important; }
.auth-panel h2 { text-align: center; border-left: none; padding-left: 0; margin-bottom: 1.75rem; font-size: 1.3rem; }
.admin-link { color: #667eea; font-size: 0.9rem; text-decoration: none; }
.admin-link:hover { text-decoration: underline; }
.topbar {
  background: #1a1a2e;
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand { font-size: 1.2rem; font-weight: bold; }
.user-info { display: flex; gap: 1rem; align-items: center; }
.container { max-width: 960px; margin: 2rem auto; padding: 0 1rem; }
.panel {
  background: #fff;
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.panel h2 { margin-bottom: 1rem; font-size: 1.1rem; border-left: 4px solid #667eea; padding-left: 0.75rem; }
.announcement {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 8px;
  padding: 1rem;
  white-space: pre-wrap;
}
.form-grid { display: grid; gap: 1rem; }
.form-grid label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.9rem; font-weight: 500; }
.form-grid input, .form-grid select, .form-grid textarea {
  padding: 0.6rem 0.75rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 0.95rem;
}
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 2px rgba(102,126,234,0.2);
}
.time-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.btn {
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: opacity 0.2s;
}
.btn:hover { opacity: 0.85; }
.btn.primary { background: #667eea; color: #fff; }
.btn.danger { background: #e53935; color: #fff; }
.btn.small { padding: 0.4rem 0.8rem; font-size: 0.85rem; background: rgba(255,255,255,0.15); color: #fff; }
.btn.full { width: 100%; margin-top: 0.5rem; }
.error { color: #e53935; margin-top: 0.75rem; font-size: 0.9rem; }
.success { color: #43a047; margin-top: 0.75rem; font-size: 0.9rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { padding: 0.6rem 0.75rem; text-align: left; border-bottom: 1px solid #eee; }
th { background: #f8f9fa; font-weight: 600; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: linear-gradient(135deg, #667eea, #764ba2); color: #fff; padding: 1.25rem; border-radius: 10px; text-align: center; }
.stat-card .num { font-size: 2rem; font-weight: bold; }
.stat-card .label { font-size: 0.85rem; opacity: 0.9; }
.tabs { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.tab-btn { padding: 0.5rem 1rem; border: 1px solid #ddd; background: #fff; border-radius: 6px; cursor: pointer; }
.tab-btn.active { background: #667eea; color: #fff; border-color: #667eea; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.toolbar { display: flex; gap: 0.75rem; margin-bottom: 1rem; flex-wrap: wrap; align-items: center; }
.inline-form { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: end; }
.inline-form label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.85rem; }
.inline-form input, .inline-form select { padding: 0.4rem 0.6rem; border: 1px solid #ddd; border-radius: 4px; }
.badge { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 4px; font-size: 0.8rem; }
.badge.ok { background: #e8f5e9; color: #2e7d32; }
.badge.ban { background: #ffebee; color: #c62828; }
.checkbox-col { width: 40px; }