body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: #f6f7fb;
  color: #1f2937;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: #111827;
  color: white;
}
.topbar a { color: white; text-decoration: none; margin-right: 16px; }
.container { max-width: 1180px; margin: 24px auto; padding: 0 20px; }
.card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 18px;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.messages { background: #fff7ed; border: 1px solid #fed7aa; padding: 12px; border-radius: 8px; margin-bottom: 18px; }
.inline-form { display: inline-flex; gap: 12px; align-items: center; }
label { display: block; margin: 8px 0; }
input, textarea, button {
  font: inherit;
  border-radius: 6px;
  border: 1px solid #d1d5db;
  padding: 8px 10px;
}
input { min-width: 320px; }
button {
  background: #2563eb;
  color: white;
  border: none;
  cursor: pointer;
  margin: 6px 4px 6px 0;
}
button:hover { background: #1d4ed8; }
table { width: 100%; border-collapse: collapse; background: white; }
th, td { border: 1px solid #e5e7eb; padding: 9px; text-align: left; }
th { background: #f3f4f6; }
.field-row { border-bottom: 1px solid #e5e7eb; padding: 12px 0; }
pre, textarea {
  width: 100%;
  white-space: pre-wrap;
  word-break: break-word;
  background: #f9fafb;
  box-sizing: border-box;
}
textarea { min-height: 220px; }
.platform-box { border: 1px solid #e5e7eb; border-radius: 8px; padding: 12px; margin: 12px 0; }