body {
  font-family: "Microsoft YaHei", sans-serif;
  max-width: 600px;
  margin: 20px auto;
  padding: 20px;
  background: #fafafa;
}

h2 {
  color: #333;
}

input, button {
  padding: 10px;
  margin: 8px 0;
  width: 100%;
  border: 1px solid #ddd;
  border-radius: 4px;
}

button {
  background: #4CAF50;
  color: white;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}

th, td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: center;
}

.status-unpaid { color: gray; }
.status-customer-paid { color: orange; }
.status-confirmed { color: green; }