/* 微信开放平台服务商官网 原创样式 无模板查重 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
}
body {
  background: #f5f7fa;
  color: #333;
  line-height: 1.6;
}
.container {
  width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
/* 导航栏 */
.header {
  background: #2c3e50;
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 99;
}
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  color: #fff;
  font-size: 22px;
  font-weight: bold;
}
.nav-menu a {
  color: #fff;
  margin-left: 30px;
  text-decoration: none;
  font-size: 16px;
}
.nav-menu a:hover {
  color: #3498db;
}
/*  banner */
.banner {
  background: #3498db;
  color: #fff;
  text-align: center;
  padding: 60px 0;
  margin-bottom: 40px;
}
.banner h1 {
  font-size: 32px;
  margin-bottom: 10px;
}
.banner p {
  font-size: 18px;
}
/* 内容区块 */
.section {
  background: #fff;
  padding: 40px;
  border-radius: 8px;
  margin-bottom: 30px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.section h2 {
  color: #2c3e50;
  font-size: 24px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #3498db;
  display: inline-block;
}
.section p {
  font-size: 16px;
  margin-bottom: 15px;
  color: #555;
}
/* 服务/案例卡片 */
.card-box {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
}
.card {
  flex: 1;
  min-width: 280px;
  background: #f8f9fa;
  padding: 25px;
  border-radius: 8px;
  border-left: 4px solid #3498db;
}
.card h3 {
  color: #2c3e50;
  margin-bottom: 10px;
}
/* 流程步骤 */
.step-box {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
  text-align: center;
}
.step {
  width: 22%;
}
.step .num {
  width: 40px;
  height: 40px;
  background: #3498db;
  color: #fff;
  border-radius: 50%;
  line-height: 40px;
  margin: 0 auto 10px;
  font-weight: bold;
}
/* 底部 */
.footer {
  background: #2c3e50;
  color: #fff;
  text-align: center;
  padding: 30px 0;
  margin-top: 50px;
}
.footer p {
  margin-bottom: 5px;
  font-size: 14px;
}
/* 响应式 */
@media (max-width: 768px) {
  .container { width: 100%; }
  .nav { flex-direction: column; gap:15px; }
  .nav-menu a { margin:0 10px; }
  .step-box { flex-direction: column; gap:20px; }
  .step { width: 100%; }
}