:root {
  --primary: #1f4e79;
  --primary-dark: #16385a;
  --accent: #2e86de;
  --bg: #f4f6f9;
  --card: #ffffff;
  --line: #dfe3e8;
  --text: #263238;
  --muted: #6b7a8a;
  --ok: #1e8449;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 26px 20px;
  text-align: center;
}

header h1 { margin: 0 0 6px; font-size: 26px; letter-spacing: 2px; }
header p { margin: 0; font-size: 14px; opacity: .85; }

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 18px;
  box-shadow: 0 1px 4px rgba(31, 78, 121, .06);
}

.card h2 {
  margin: 0 0 14px;
  font-size: 18px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card h3 {
  margin: 22px 0 10px;
  font-size: 15px;
  color: var(--primary);
  border-left: 4px solid var(--accent);
  padding-left: 8px;
}

.step {
  display: inline-flex;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex: none;
}

.drop-zone {
  border: 2px dashed #b6c4d4;
  border-radius: 10px;
  padding: 34px 16px;
  text-align: center;
  cursor: pointer;
  background: #fafcff;
  transition: border-color .15s, background .15s;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: #eef5fc;
}

.dz-icon { font-size: 30px; color: var(--accent); }
.dz-main { margin: 8px 0 4px; font-size: 15px; }
.dz-hint { margin: 0; font-size: 12px; color: var(--muted); }

.file-info {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #eef8ef;
  color: var(--ok);
  font-size: 14px;
}

.error {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #fdecea;
  color: #b71c1c;
  font-size: 14px;
}

.hidden { display: none !important; }

.notice {
  background: #eef5fc;
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--primary);
}

.mapping-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.mapping-grid label {
  font-size: 13px;
  color: var(--muted);
  display: block;
}

.mapping-grid select {
  width: 100%;
  margin-top: 4px;
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table.data {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
  white-space: nowrap;
}

table.data th {
  background: var(--primary);
  color: #fff;
  padding: 8px 10px;
  font-weight: 600;
  position: sticky;
  top: 0;
}

table.data td {
  padding: 6px 10px;
  border-top: 1px solid var(--line);
  text-align: center;
}

table.data tr:nth-child(even) td { background: #f7f9fb; }
table.data td.left { text-align: left; }

.settings {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 16px;
}

.settings label {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.settings input, .settings select {
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  min-width: 130px;
}

button {
  padding: 9px 18px;
  border: none;
  border-radius: 7px;
  font-size: 14px;
  cursor: pointer;
}

button.primary {
  background: var(--primary);
  color: #fff;
}

button.primary:hover { background: var(--primary-dark); }

button.secondary {
  background: #eef2f6;
  color: var(--primary);
  border: 1px solid var(--line);
}

button.secondary:hover { background: #e2e9f1; }

button:disabled { opacity: .55; cursor: not-allowed; }

#runBtn { font-size: 16px; padding: 11px 30px; }

.progress-wrap {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.progress-bar {
  flex: 1;
  height: 10px;
  border-radius: 5px;
  background: #e6ecf2;
  overflow: hidden;
}

#progressFill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), #4aa3e8);
  transition: width .15s;
}

#progressText { font-size: 13px; color: var(--muted); white-space: nowrap; }

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 6px;
}

.summary .item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
  background: #fbfcfe;
}

.summary .item .num { font-size: 22px; font-weight: 700; color: var(--primary); }
.summary .item .lbl { font-size: 12px; color: var(--muted); margin-top: 2px; }
.summary .item.ok .num { color: var(--ok); }

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 4px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 10px;
}

.filter-bar label { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.filter-bar select, .filter-bar input {
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
}

#bandTables .band-block { margin-bottom: 14px; }
#bandTables .band-block h4 { margin: 8px 0 6px; font-size: 14px; color: var(--primary); }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 16px;
}