:root {
  --page-bg: #f6f8fb;
  --brand: #409eff;
  --brand-soft: rgba(64, 158, 255, 0.1);
  --text: #303133;
  --muted: #7a8290;
  --line: #ebeef5;
  --panel: #fafbfc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page-bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

/* ---------- 页头 ---------- */
.page-header {
  margin-bottom: 28px;
}

.page-header h1 {
  margin: 0 0 10px;
  font-size: 24px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.subtitle code {
  background: var(--brand-soft);
  color: var(--brand);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
}

/* ---------- 卡片 ---------- */
.card {
  margin-bottom: 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.card:hover {
  border-color: #dfe5ee;
  box-shadow: 0 8px 28px rgba(31, 45, 61, 0.06);
}

.card .el-card__header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 15px;
  font-weight: 600;
}

/* ---------- 上传区 ---------- */
.upload-icon {
  color: var(--brand);
  line-height: 1;
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
}

.card .el-upload-dragger {
  padding: 34px 20px;
  border: 1px dashed #d4dbe6;
  border-radius: 10px;
  background: var(--panel);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.card .el-upload-dragger:hover,
.card .el-upload-dragger.is-dragover {
  border-color: var(--brand);
  background: var(--brand-soft);
}

.el-upload__text {
  color: var(--muted);
  font-size: 14px;
}

.el-upload__text em {
  color: var(--brand);
  font-style: normal;
}

.el-upload__tip {
  color: #9aa3b2;
  margin-top: 10px;
}

/* ---------- 操作区 ---------- */
.actions {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.actions .el-button {
  border-radius: 9px;
}

/* ---------- 提示 ---------- */
.alert {
  margin-top: 12px;
  border-radius: 10px;
}

.warning-list {
  margin: 6px 0 0;
  padding-left: 18px;
  line-height: 1.7;
}

/* ---------- 分组结果 ---------- */
.group-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid #f2f4f8;
}

.group-row:last-child {
  border-bottom: none;
}

.group-tag {
  flex: none;
}

.group-files {
  color: var(--muted);
  font-size: 13px;
  word-break: break-all;
}

/* ---------- 结果明细 ---------- */
.sheet-block {
  margin-bottom: 18px;
}

.sheet-block:last-child {
  margin-bottom: 0;
}

.sheet-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 10px;
}

.file-block {
  padding: 12px 14px;
  background: var(--panel);
  border: 1px solid #f0f2f6;
  border-radius: 10px;
  margin-bottom: 10px;
}

.file-name {
  font-size: 13px;
  color: var(--text);
  margin-bottom: 8px;
}

.col-tag {
  margin: 0 6px 6px 0;
}