.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 16px 32px 0;

  @media (max-width: 1024px) {
    padding: 12px 16px 0;
  }

  // 窄屏保持四格一行，只是缩成一条紧凑的统计带
  @media (max-width: 768px) {
    gap: 6px;
    padding: 8px 12px 0;
  }
}

.card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 13px 15px;
  border-radius: 14px;
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-card);
  min-width: 0;

  @media (max-width: 768px) {
    gap: 1px;
    padding: 7px 8px;
    border-radius: 10px;
    box-shadow: none;
  }
}

.label {
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;

  @media (max-width: 768px) {
    font-size: 0.62rem;
  }
}

.valueRow {
  display: flex;
  align-items: baseline;
  gap: 5px;
  min-width: 0;
}

.value {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-highlight);

  @media (max-width: 768px) {
    font-size: 0.95rem;
  }
}

.download {
  color: var(--color-success);
}

.upload {
  color: var(--color-focus-blue);
}

.unit {
  font-size: 0.72rem;
  color: var(--color-text-secondary);

  @media (max-width: 768px) {
    font-size: 0.6rem;
  }
}

/* 空 hint 也占位，四张卡片高度才对齐 */
.hint {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  opacity: 0.8;
  min-height: 1em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;

  // 窄屏放不下，累计流量的上下行明细只在宽屏显示
  @media (max-width: 768px) {
    display: none;
  }
}