body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  margin: 0;
  background: #f5f7fb;
  color: #222;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px 40px;
}

h1 {
  margin-bottom: 10px;
}

.card {
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06);
  margin: 20px 0;
}

.muted {
  color: #666;
}

.error {
  color: #d93025;
}

.success {
  color: #1a7f37;
}

.button {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 16px;
  border: none;
  background: #3b82f6;
  color: #fff;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
}

.button.ghost {
  background: #eef2ff;
  color: #1d4ed8;
}

.hidden {
  display: none;
}

.link-box {
  display: flex;
  gap: 8px;
}

.link-box input {
  flex: 1;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 6px;
}

.actions {
  display: flex;
  gap: 10px;
}

.question {
  min-height: 120px;
  padding: 12px;
  border: 1px dashed #ccc;
  border-radius: 8px;
  background: #fafafa;
}

.answer-box {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

input {
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 6px;
  width: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

th,
td {
  border-bottom: 1px solid #eee;
  padding: 8px;
  text-align: left;
}

.hint {
  font-weight: 600;
  color: #111827;
}

.site-footer {
  text-align: center;
  padding: 24px 16px 40px;
  color: #555;
  font-size: 14px;
}

.site-footer p {
  margin: 6px 0;
}

.gongan {
  width: 16px;
  height: 16px;
  vertical-align: text-bottom;
  margin: 0 4px;
}