/* 全局重置 + 谷歌SEO适配样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
}
/* 钉钉官方主色调：蓝紫渐变 */
:root {
  --primary: #2A5DE2;
  --secondary: #7B61FF;
  --light: #F5F7FF;
  --dark: #1D2129;
  --gray: #6E7681;
}
body {
  color: var(--dark);
  background: #fff;
  line-height: 1.6;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}
/* 导航栏 */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  background: white;
  z-index: 999;
}
.logo {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo img {
  height: 36px;
}
.nav-menu {
  display: flex;
  gap: 30px;
}
.nav-menu a {
  font-weight: 500;
  color: var(--dark);
  transition: 0.3s;
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--primary);
}
/* 按钮样式 */
.btn {
  padding: 10px 22px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: 0.3s;
}
.btn-primary {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: white;
}
.btn-primary:hover {
  opacity: 0.9;
}
/* 首页banner */
.banner {
  padding: 80px 0;
  background: linear-gradient(135deg, #E8EEFF 0%, #F3EFFF 100%);
  text-align: center;
}
.banner h1 {
  font-size: 42px;
  margin-bottom: 16px;
  color: var(--dark);
}
.banner p {
  font-size: 18px;
  color: var(--gray);
  max-width: 700px;
  margin: 0 auto 30px;
}
.banner-img {
  max-width: 700px;
  width: 100%;
  margin-top: 20px;
}
/* 文章卡片 */
.card-wrap {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin: 40px 0;
}
.card {
  border: 1px solid #eee;
  border-radius: 10px;
  overflow: hidden;
  transition: 0.3s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.card-body {
  padding: 18px;
}
.card-title {
  font-size: 17px;
  font-weight: bold;
  margin-bottom: 8px;
}
.card-text {
  color: var(--gray);
  font-size: 14px;
}
/* 内容页 */
.content-page {
  padding: 50px 0;
}
.content-title {
  font-size: 30px;
  margin-bottom: 20px;
}
.content-img {
  width: 100%;
  max-height: 450px;
  object-fit: cover;
  border-radius: 10px;
  margin: 20px 0;
}
.content-desc {
  font-size: 16px;
  line-height: 1.8;
  color: #333;
}
/* 下载页 */
.download-box {
  text-align: center;
  padding: 50px 0;
}
.download-img {
  max-width: 500px;
  width: 100%;
  margin: 20px 0;
}
.version-list {
  margin: 30px 0;
  text-align: left;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.version-item {
  padding: 12px 16px;
  background: var(--light);
  border-radius: 6px;
  margin-bottom: 10px;
}
/* 404页面 */
.page-404 {
  text-align: center;
  padding: 100px 0;
}
.page-404 h1 {
  font-size: 80px;
  color: var(--primary);
}
.page-404 p {
  font-size: 20px;
  margin: 20px 0;
}
/* 底部 */
.footer {
  background: var(--dark);
  color: white;
  padding: 40px 0;
  margin-top: 60px;
  text-align: center;
}