/* 全局重置 + 必应SEO基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  scroll-behavior: smooth; /* 平滑滚动，SEO/体验双优 */
}

/* 页面基础样式 */
body {
  line-height: 1.6;
  color: #333;
  background-color: #fff;
  padding-top: 70px; /* 适配固定导航栏高度 */
}

/* ====================== 固定长款导航栏（核心要求） ====================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%; /* 全屏长款 */
  height: 70px;
  background: #ffffff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
}

/* 导航Logo */
.navbar .logo {
  font-size: 24px;
  font-weight: bold;
  color: #0668E1; /* WPS品牌蓝 */
  text-decoration: none;
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-menu a {
  text-decoration: none;
  color: #333;
  font-size: 16px;
  font-weight: 500;
  transition: color 0.3s;
}

/* 导航高亮（滚动定位标识） */
.nav-menu a.active,
.nav-menu a:hover {
  color: #0668E1;
  border-bottom: 2px solid #0668E1;
  padding-bottom: 5px;
}

/* 下载按钮高亮 */
.download-btn {
  background: #0668E1;
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 4px;
  border: none !important;
}
.download-btn:hover {
  background: #0556bb;
}

/* ====================== 主页区块样式 ====================== */
.section {
  min-height: 100vh;
  padding: 80px 5%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.section h2 {
  font-size: 36px;
  color: #0668E1;
  margin-bottom: 30px;
  text-align: center;
}
.section p {
  font-size: 18px;
  max-width: 1000px;
  margin: 0 auto 20px;
  text-align: center;
}

/* 首页首屏 */
#home {
  background: #f5f7fa;
  text-align: center;
}
#home h1 {
  font-size: 48px;
  color: #333;
  margin-bottom: 20px;
}

/* ====================== 通用页面样式 ====================== */
.page-container {
  min-height: calc(100vh - 120px);
  padding: 50px 5%;
  max-width: 1200px;
  margin: 0 auto;
}
.page-container h1 {
  font-size: 42px;
  color: #0668E1;
  margin-bottom: 30px;
  text-align: center;
}
.page-container .content {
  font-size: 18px;
  line-height: 1.8;
}

/* 下载按钮 */
.download-main-btn {
  display: inline-block;
  background: #0668E1;
  color: #fff;
  padding: 15px 40px;
  font-size: 20px;
  border-radius: 6px;
  text-decoration: none;
  margin: 30px auto;
  transition: background 0.3s;
}
.download-main-btn:hover {
  background: #0556bb;
}

/* 底部 */
footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 20px 0;
  margin-top: 50px;
}