:root {
  /* 约定颜色 */
  --navy: #14395e;
  --blue: #2f6fb5;
  --pale-blue: #e8f0fa;
  --page: #f6f8fb;
  --border: #d8e0ea;
  /* 派生颜色 */
  --text: #213247;
  --muted: #6f8195;
  --white: #ffffff;
  --danger: #a83c3c;
  --mask: rgba(20, 57, 94, 0.45);
  --radius: 10px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
  line-height: 1.75;
  overflow-wrap: break-word;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header { background: var(--navy); color: var(--white); }
.header-inner, .nav {
  max-width: 1000px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  gap: 22px;
}
.brand {
  color: var(--white);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 22px;
  font-weight: 700;
  margin-right: auto;
}
.site-nav { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; }
.nav a, .site-nav a { color: var(--pale-blue); font-size: 14px; }
.container { max-width: 1000px; margin: 0 auto; padding: 34px 24px 56px; }
h1, h2 { color: var(--navy); font-family: Georgia, "Times New Roman", serif; line-height: 1.25; }
h1 { font-size: 34px; margin: 0 0 12px; }
h2 { font-size: 22px; margin: 32px 0 14px; }
.lead { color: var(--muted); margin-top: 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin: 26px 0; }
.stat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.stat strong { display: block; color: var(--navy); font-family: Georgia, "Times New Roman", serif; font-size: 28px; }
.stat span { color: var(--muted); font-size: 13px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.panel h2 { margin-top: 0; }
.card, .entry {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.entry + .entry, .card + .card { margin-top: 12px; }
.card h3, .entry h3 { margin: 0 0 6px; color: var(--navy); font-size: 17px; }
.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius);
  background: var(--pale-blue);
  color: var(--navy);
  font-size: 12px;
  line-height: 1.6;
}
.hint { color: var(--muted); font-size: 13px; }
.empty { color: var(--muted); text-align: center; padding: 22px 12px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
label { display: grid; gap: 5px; color: var(--muted); font-size: 13px; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
}
textarea { min-height: 116px; resize: vertical; }
button {
  border: 0;
  border-radius: var(--radius);
  background: var(--blue);
  color: var(--white);
  padding: 10px 16px;
  cursor: pointer;
  font: inherit;
}
button:hover { filter: brightness(0.94); }
button.primary { background: var(--blue); color: var(--white); }
button.secondary { background: var(--pale-blue); color: var(--navy); }
button.danger { background: var(--danger); color: var(--white); }
button.small { padding: 6px 10px; font-size: 13px; }
.actions { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.toolbar { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) auto; gap: 10px; align-items: end; }
table, table.data { width: 100%; border-collapse: collapse; background: var(--white); }
th, td { border-bottom: 1px solid var(--border); padding: 10px 12px; text-align: left; vertical-align: top; }
th { color: var(--navy); background: var(--pale-blue); font-weight: 700; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.message { color: var(--blue); min-height: 28px; }
.error { color: var(--danger); }
.chart-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
figure.chart, .chart-card {
  margin: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
figure.chart img, .chart-card img { width: 100%; max-width: 100%; height: auto; display: block; }
figure.chart figcaption, .chart-card p { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  padding: 18px 24px;
}
.footer-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
}
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  max-width: calc(100% - 32px);
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius);
  padding: 10px 18px;
  z-index: 50;
}
.modal-mask {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--mask);
  z-index: 60;
}
.modal {
  width: 100%;
  max-width: 520px;
  max-height: 84vh;
  overflow: auto;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.toast[hidden], .modal-mask[hidden] { display: none; }
[hidden] { display: none !important; }
@media (max-width: 760px) {
  .nav, .header-inner { flex-wrap: wrap; gap: 12px; }
  .brand { flex-basis: 100%; }
  .site-nav { margin-left: 0; }
  h1 { font-size: 28px; }
}
@media (max-width: 640px) {
  .container { padding: 24px 14px 44px; }
  .nav, .header-inner { padding: 14px 14px; }
  .site-footer { padding: 16px 14px; }
  .stats-grid, .grid, .chart-grid, .form-grid, .toolbar { grid-template-columns: minmax(0, 1fr); }
  .stat, .panel, .card, .entry, figure.chart, .chart-card { padding: 16px; }
  h1 { font-size: 24px; }
  h2 { font-size: 19px; }
  .toast { bottom: 16px; }
}