* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f5f6f8;
  color: #333;
  font-size: 15px;
  line-height: 1.6;
  padding: 16px;
}
.card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
h1 { font-size: 20px; margin-bottom: 8px; }
h2 { font-size: 16px; margin: 16px 0 8px; }
.tip {
  background: #fff7e6;
  border-left: 3px solid #faad14;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  color: #8c6d1f;
  margin-bottom: 16px;
}
.danger {
  background: #fff1f0;
  border-left: 3px solid #ff4d4f;
  color: #a8071a;
}
label { display: block; margin: 14px 0 6px; font-weight: 500; }
.required::after { content: " *"; color: #ff4d4f; }
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d9d9d9;
  border-radius: 8px;
  font-size: 15px;
  outline: none;
  background: #fff;
}
input:focus, select:focus, textarea:focus { border-color: #1677ff; }
textarea { min-height: 120px; resize: vertical; }
button {
  width: 100%;
  padding: 12px;
  background: #1677ff;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  margin-top: 20px;
  cursor: pointer;
}
button:disabled { background: #b0c4e8; }
button.secondary { background: #fff; color: #1677ff; border: 1px solid #1677ff; }
.code-box {
  background: #f0f5ff;
  border: 1px dashed #1677ff;
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  margin: 16px 0;
}
.code-box .code {
  font-size: 28px;
  font-weight: bold;
  letter-spacing: 2px;
  color: #1677ff;
  font-family: monospace;
}
.status {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 13px;
}
.status-0 { background: #fff7e6; color: #d46b08; }
.status-1 { background: #e6f4ff; color: #0958d9; }
.status-2 { background: #f6ffed; color: #389e0d; }
.log-item {
  border-left: 2px solid #e8e8e8;
  padding: 0 0 12px 14px;
  position: relative;
}
.log-item::before {
  content: "";
  position: absolute;
  left: -5px; top: 6px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #1677ff;
}
.log-time { font-size: 12px; color: #999; }
.hidden { display: none; }
.center { text-align: center; }