/* 必应SEO友好 · 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", Arial, sans-serif;
}
:root {
  --wps-blue: #409eff;
  --wps-dark: #303133;
  --wps-gray: #606266;
  --wps-light: #f5f7fa;
  --wps-white: #ffffff;
}
body {
  color: var(--wps-dark);
  background: var(--wps-light);
  line-height: 1.6;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
/* 导航栏 */
.header {
  background: var(--wps-white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 999;
}
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}
.logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--wps-blue);
  text-decoration: none;
}
.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
}
.nav-menu a {
  color: var(--wps-dark);
  text-decoration: none;
  font-size: 16px;
  transition: color 0.3s;
}
.nav-menu a:hover {
  color: var(--wps-blue);
}
/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--wps-blue);
  color: white;
  border-radius: 6px;
  text-decoration: none;
  font-size: 16px;
  transition: background 0.3s;
  border: none;
  cursor: pointer;
}
.btn:hover {
  background: #337ecc;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--wps-blue);
  color: var(--wps-blue);
}
/* 内容区块 */
.section {
  padding: 60px 0;
}
.section-title {
  text-align: center;
  margin-bottom: 40px;
}
.section-title h2 {
  font-size: 32px;
  margin-bottom: 10px;
}
.section-title p {
  color: var(--wps-gray);
  font-size: 18px;
}
/* 卡片布局 */
.card-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 30px;
}
.card {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 3px 15px rgba(0,0,0,0.05);
  transition: transform 0.3s;
}
.card:hover {
  transform: translateY(-5px);
}
.card h3 {
  font-size: 20px;
  margin-bottom: 15px;
  color: var(--wps-blue);
}
.card p {
  color: var(--wps-gray);
}
/* 底部 */
.footer {
  background: var(--wps-dark);
  color: white;
  padding: 50px 0 20px;
  margin-top: 50px;
}
.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}
.footer-col h4 {
  font-size: 18px;
  margin-bottom: 20px;
  color: var(--wps-blue);
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col a {
  color: #ccc;
  text-decoration: none;
}
.footer-col a:hover {
  color: white;
}
.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #444;
  color: #999;
}
/* 响应式 */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .section-title h2 {
    font-size: 26px;
  }
}