:root {
  --red: #d7000f;
  --red-dark: #b4000c;
  --ink: #262626;
  --muted: #8c8c8c;
  --border: #e5e5e5;
  --bg: #f5f6f8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

header {
  background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 100%);
  color: #fff;
  padding: 28px 20px;
}

.brand {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  flex: none;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 1px;
}

.brand h1 { margin: 0; font-size: 22px; }
.sub { margin: 2px 0 0; font-size: 13px; opacity: 0.9; }

main {
  max-width: 920px;
  margin: 24px auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.card h2 {
  margin: 0 0 14px;
  font-size: 16px;
  color: var(--red);
}

.hidden { display: none !important; }

/* 表单行 */
.form-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.date-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
}

input[type="date"] {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}

.status {
  font-size: 13px;
  color: var(--muted);
}

/* 拖拽上传区 */
.drop-zone {
  border: 2px dashed #d9d9d9;
  border-radius: 12px;
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  background: #fafafa;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--red);
  background: #fff5f5;
}

.drop-zone.small { padding: 16px; margin-top: 10px; }

.drop-icon { font-size: 28px; }
.drop-main { margin: 6px 0; font-size: 14px; }
.drop-main b { color: var(--red); }

.hint {
  font-size: 12px;
  color: var(--muted);
  margin: 4px 0 0;
}

.file-name {
  margin: 8px 0 0;
  font-size: 13px;
  color: #389e0d;
  font-weight: 600;
}

.base-details {
  margin-top: 14px;
  font-size: 13px;
}

.base-details summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 600;
  padding: 4px 0;
}

.link-btn {
  background: none;
  border: none;
  color: var(--red);
  cursor: pointer;
  font-size: 13px;
  padding: 4px 0;
  text-decoration: underline;
}

/* 数据核对表 */
.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th, td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
  white-space: nowrap;
}

th { background: #fafafa; font-weight: 600; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.total td { background: #fff7f7; font-weight: 700; }

/* 按钮 */
button.primary {
  background: var(--red);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}

button.primary:hover:not(:disabled) { background: var(--red-dark); }
button.primary:disabled { background: #d9d9d9; cursor: not-allowed; }

#generateBtn { margin-top: 12px; }

button:not(.primary):not(.link-btn) {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 22px;
  font-size: 15px;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s;
}

button:not(.primary):not(.link-btn):hover { border-color: var(--red); color: var(--red); }

/* 报告输出 */
.base-info {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}

.warning {
  background: #fffbe6;
  border: 1px solid #ffe58f;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  color: #874d00;
  margin-bottom: 12px;
}

#reportPre {
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-size: 14px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: inherit;
  max-height: 480px;
  overflow-y: auto;
  margin: 0 0 14px;
}

.actions { display: flex; gap: 12px; }

footer {
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  padding: 16px 20px 28px;
}

@media (max-width: 600px) {
  .actions { flex-direction: column; }
  .actions button { width: 100%; }
}