:root {
  --green: #1f7a3d;
  --green-dark: #145428;
  --green-light: #eaf6ef;
  --red: #c0392b;
  --amber: #b9770e;
  --text: #1f2d24;
  --muted: #66766c;
  --border: #dce7df;
  --card-bg: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(160deg, #eef6f0 0%, #f8fbf9 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* 锁定屏 */
.lock-screen {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, #145428, #1f7a3d 55%, #3a9d63);
  padding: 20px;
}
.lock-card {
  background: #fff; border-radius: 18px; padding: 32px 28px; width: 100%; max-width: 400px;
  text-align: center; box-shadow: 0 20px 60px rgba(0,0,0,.22);
}
.lock-card .brand { color: var(--green); font-weight: 800; letter-spacing: 2px; }
.lock-card h1 { margin: 10px 0 6px; font-size: 24px; }
.lock-card p { color: var(--muted); margin: 0 0 20px; }
.lock-card input {
  width: 100%; padding: 13px 14px; font-size: 18px; text-align: center;
  border: 1px solid var(--border); border-radius: 10px; margin-bottom: 12px;
}
.lock-card input:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px var(--green-light); }

/* 顶部 */
.topbar { background: #fff; border-bottom: 1px solid var(--border); padding: 16px 20px; }
.topbar .brand { color: var(--green); font-weight: 800; letter-spacing: 2px; }
.topbar h1 { display: inline-block; margin: 0 0 0 10px; font-size: 22px; }
.topbar .sub { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }

.container { max-width: 860px; margin: 0 auto; padding: 20px 16px 60px; }

.card {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 14px;
  padding: 18px; margin-bottom: 16px; box-shadow: 0 6px 18px rgba(20,84,40,.05);
}
.card-title { font-size: 17px; font-weight: 800; color: var(--green-dark); margin-bottom: 14px; }

.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.field { display: flex; flex-direction: column; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input, .field select {
  padding: 11px 12px; font-size: 16px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; color: var(--text);
}
.field input:focus, .field select:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px var(--green-light); }
.readonly {
  padding: 11px 12px; font-size: 16px; min-height: 45px; background: #f6f9f7;
  border: 1px solid var(--border); border-radius: 8px; display: flex; align-items: center;
}
.readonly.strong { font-weight: 800; }
.readonly.red { color: var(--red); }

.warning {
  margin-top: 12px; padding: 12px 14px; border-radius: 10px;
  background: #fdf3e7; border: 1px solid #f1d3b0; color: var(--amber); font-weight: 600;
}

/* 结果 */
.result-card { border-color: #cfe4d6; }
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.result-item {
  background: #f6f9f7; border: 1px solid var(--border); border-radius: 10px; padding: 14px;
}
.result-item .label { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.result-item .value { font-size: 22px; font-weight: 800; }
.result-item .value.green { color: var(--green); }
.result-item .value.red { color: var(--red); }
.result-item .value.range { font-size: 16px; }
.result-item .note { font-size: 12px; color: var(--muted); margin-top: 6px; }
.badge {
  display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 7px; border-radius: 20px;
  background: #eef4f0; color: var(--muted); vertical-align: middle;
}
.badge.exact { background: var(--green-light); color: var(--green-dark); }
.badge.estimate { background: #fdf3e7; color: var(--amber); }

.loading { padding: 20px; text-align: center; color: var(--muted); }

/* 打折估价 */
.discount-panel {
  margin-top: 16px; padding: 14px; border-radius: 12px;
  background: var(--green-light); border: 1px dashed var(--green);
}
.discount-title { font-size: 15px; font-weight: 800; color: var(--green-dark); margin-bottom: 10px; }
.discount-sub { font-size: 12px; font-weight: 500; color: var(--muted); margin-left: 6px; }
.discount-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.discount-btn {
  border: 1px solid var(--green); background: #fff; color: var(--green-dark);
  padding: 10px 16px; border-radius: 999px; font-weight: 800; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
}
.discount-btn:hover { background: #dcefe4; }
.discount-btn.active { background: var(--green); color: #fff; }
.discount-btn.warn { border-color: var(--amber); color: var(--amber); }
.discount-btn.warn.active { background: var(--amber); border-color: var(--amber); color: #fff; }
.discount-btn .tag {
  font-size: 11px; font-weight: 700; padding: 2px 7px; border-radius: 999px;
  background: #fdf3e7; color: var(--amber);
}
.discount-btn.warn.active .tag { background: #fff; color: var(--amber); }
.discount-note { margin-top: 10px; font-size: 12px; color: var(--muted); line-height: 1.5; }
.orig { margin-top: 4px; font-size: 13px; color: var(--muted); text-decoration: line-through; }
.badge.discount { background: var(--green); color: #fff; margin-left: 8px; }

/* 按钮 */
.actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
button {
  border: none; border-radius: 10px; padding: 12px 18px; font-size: 16px; font-weight: 700; cursor: pointer;
}
button.primary { background: var(--green); color: #fff; }
button.primary:hover { background: var(--green-dark); }
button.ghost { background: #fff; color: var(--green); border: 1px solid var(--green); }
button.ghost:hover { background: var(--green-light); }
.copy-tip { margin-top: 10px; color: var(--green-dark); font-weight: 600; }

.error-text { color: var(--red); min-height: 20px; margin-top: 10px; }
.footer { max-width: 860px; margin: 0 auto; padding: 0 16px 30px; color: var(--muted); font-size: 12px; text-align: center; }

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .result-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .topbar h1 { font-size: 19px; }
  .result-item .value { font-size: 18px; }
  .field { min-width: 0; overflow: hidden; }
  .field input, .field select {
    width: 100%; max-width: 100%; font-size: 14px;
    padding: 10px 8px; box-sizing: border-box;
  }
  .field label { font-size: 12px; }
  .readonly { font-size: 14px; padding: 10px 8px; min-height: 40px; }
  .card { padding: 14px; }
  .container { padding: 12px 10px 40px; }
  .discount-btn { padding: 10px 12px; font-size: 14px; }
  .discount-btn .tag { font-size: 10px; padding: 1px 5px; }
  .actions { gap: 8px; }
  .actions button { flex: 1; padding: 11px 8px; font-size: 14px; }
  .card-title { font-size: 15px; }
  .result-item { padding: 10px; }
  .result-item .label { font-size: 12px; }
  .topbar { padding: 12px 14px; }
}