/* 简洁版样式 */
:root {
  --bg: #ffffff;
  --text: #1f2937;
  --surface: #f8fafc;
  --border: #e5e7eb;
  --primary: #0ea5e9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f14;
    --text: #e5e7eb;
    --surface: #0f172a;
    --border: #1f2937;
    --primary: #38bdf8;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans";
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.page-title {
  margin: 0 0 16px;
  font-size: 24px;
  font-weight: 700;
}

.content-box {
  min-height: 360px; /* 空白内容区高度，可调整 */
  padding: 16px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  background: var(--surface);
  white-space: pre-line;
  overflow-wrap: break-word;
}

.site-footer {
  border-top: 1px solid var(--border);
}
.site-footer small { color: #9ca3af; }

@media (max-width: 640px) {
  .container { padding: 20px 12px 32px; }
  .page-title { font-size: 20px; }
  .content-box { min-height: 280px; }
}