:root {
  --bg: #f4f7f9;
  --card: #ffffff;
  --line: #d9e1ea;
  --text: #18212f;
  --muted: #667085;
  --primary: #176b87;
  --success: #2f7d5b;
  --danger: #c8553d;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 "Microsoft YaHei", Arial, sans-serif;
}
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 8px 30px rgba(24, 33, 47, 0.06);
}
h1, h2 { margin-top: 0; }
.muted { color: var(--muted); }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.form-grid h2, .form-grid .full, .form-grid button { grid-column: 1 / -1; }
label { display: grid; gap: 6px; font-weight: 700; }
input {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  resize: vertical;
  font: inherit;
}
select {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
}
.primary-button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  color: #fff;
  background: var(--primary);
  cursor: pointer;
}
.alert {
  margin: 14px 0;
  padding: 12px 14px;
  border-radius: 8px;
}
.alert.success { background: #eaf6ef; color: var(--success); }
.alert.error { background: #fff0ec; color: var(--danger); }
.alert.info { background: #e7f3f6; color: var(--primary); }
.ghost-button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--text);
  background: #fff;
  cursor: pointer;
}
.danger-button {
  color: var(--danger);
  border-color: #efc0b4;
}
.link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}
.site-header {
  background: #122836;
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.site-logo {
  color: #fff;
  text-decoration: none;
  font-size: 20px;
  font-weight: 700;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.site-nav a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
}
.front-main {
  padding-top: 24px;
}
.hero-card {
  margin-bottom: 18px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}
.front-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.list-grid {
  display: grid;
  gap: 12px;
}
.mini-card {
  display: grid;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}
.search-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px;
  gap: 12px;
}
.requirements { margin: 20px 0 24px; }
.requirement {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 10px;
}
.requirement.ok strong { color: var(--success); }
.requirement.fail strong { color: var(--danger); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.stat-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  background: #fff;
}
.stat-card span { color: var(--muted); display: block; }
.stat-card strong { font-size: 28px; }
.single-column {
  grid-template-columns: 1fr;
}
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.login-card {
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
}
.admin-shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  min-height: 100vh;
}
.admin-sidebar {
  padding: 24px 18px;
  color: #fff;
  background: #122836;
}
.admin-sidebar h2 {
  margin-bottom: 24px;
}
.admin-nav {
  display: grid;
  gap: 8px;
}
.admin-nav a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 8px;
}
.admin-nav a:hover {
  background: rgba(255, 255, 255, 0.12);
}
.admin-main {
  padding: 24px;
}
.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}
.admin-grid {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 16px;
}
.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}
th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
th {
  background: #f7fafb;
  color: var(--muted);
}
.inline-form {
  display: flex;
  align-items: center;
  gap: 8px;
}
.action-group,
.action-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.info-list {
  display: grid;
  gap: 10px;
}
.top-gap {
  margin-top: 12px;
}
.log-list {
  display: grid;
  gap: 12px;
}
.log-item {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.compact-form {
  min-width: 220px;
}
@media (max-width: 720px) {
  .form-grid, .stats-grid { grid-template-columns: 1fr; }
  .site-header-inner,
  .front-grid,
  .search-bar,
  .detail-grid {
    grid-template-columns: 1fr;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-header-inner {
    display: grid;
  }
  .admin-shell,
  .admin-grid {
    grid-template-columns: 1fr;
  }
  .admin-header {
    flex-direction: column;
    align-items: flex-start;
  }
}