body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f6f8fb;
}

/* 页面标题 */
.page-header {
  text-align: center;
  margin: 60px 0 40px;
}

.page-title {
  font-size: 36px;
  font-weight: 700;
  color: #222;
}

.page-subtitle {
  margin-top: 10px;
  font-size: 15px;
  color: #777;
}

/* 大区域容器 */
.tools-wrapper {
  max-width: 1200px;
  margin: 0 auto 80px;
  padding: 0 20px;
}

/* 卡片网格 */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

/* 工具卡片 */
.tool-card {
  background: #fff;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 22px rgba(0,0,0,0.08);
}

.tool-title {
  margin: 0;
  font-size: 18px;
  color: #333;
}

.tool-desc {
  font-size: 14px;
  color: #666;
  margin: 10px 0;
  line-height: 1.5;
}

.tool-tags {
  margin-bottom: 14px;
}

.tool-tags span {
  display: inline-block;
  background: #eef2ff;
  color: #4a6cf7;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 14px;
  margin-right: 6px;
  margin-bottom: 6px;
}

.tool-btn {
  margin-top: auto;
  align-self: flex-end;
  padding: 8px 14px;
  background: #4a6cf7;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
}

/* ===== 移动端（安卓）优化：一行一个 ===== */
@media (max-width: 768px) {

  /* 标题别占太多屏 */
  .page-header {
    margin: 24px 0 16px;
  }

  .page-title {
    font-size: 24px;
  }

  .page-subtitle {
    font-size: 13px;
    padding: 0 12px;
  }

  /* 主区域边距缩小 */
  .tools-wrapper {
    padding: 0 14px;
  }

  /* ✅ 一行只有一个 */
  .tools-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  /* 卡片做“大号按钮” */
  .tool-card {
    padding: 22px;
    border-radius: 18px;
  }

  .tool-title {
    font-size: 19px;
  }

  .tool-desc {
    font-size: 14px;
    line-height: 1.7;
    margin: 12px 0;
  }

  .tool-tags span {
    font-size: 13px;
    padding: 6px 12px;
  }

  /* 按钮：全宽 + 高 */
  .tool-btn {
    margin-top: 16px;
    align-self: stretch;
    text-align: center;
    font-size: 16px;
    padding: 14px 0;
    border-radius: 12px;
  }
}