* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", "Heiti SC", sans-serif; background: #fff; color: #000; }
img { border: 0; vertical-align: middle; }
a { color: #969494; text-decoration: none; }

.nav {
  position: fixed; top: 0; left: 0; width: 100%;
  background: #fff; z-index: 999;
  border-bottom: 1px solid #eee;
}
.nav-inner {
  max-width: 1920px; margin: 0 auto;
  height: 80px; padding: 10px 40px;
  display: flex; justify-content: space-between; align-items: center;
}
.logo { height: 32px; object-fit: contain; }
.nav-links { display: flex; gap: 50px; font-size: 20px; }
.nav-links { position: relative; }
.nav-links a {
  padding: 0 15px; line-height: 60px; transition: color 0.3s;
  display: inline-block; position: relative; z-index: 1;
}
.nav-links a:hover,
.nav-links a.active { color: #1677ff; font-weight: 700; }
.nav-indicator {
  position: absolute; bottom: 0; height: 3px;
  background: #1677ff; border-radius: 2px;
  transition: left 0.3s ease, width 0.3s ease;
}

#root { max-width: 1920px; margin: 0 auto; padding-top: 80px; }

section img { width: 100%; display: block; }

.text-section {
  padding: 100px 40px; text-align: center;
  background: #f8f8f8; min-height: 300px;
}
.section-title {
  font-size: 32px; font-weight: 700; color: #0f0f0f; margin-bottom: 15px;
}
.section-line {
  width: 53px; height: 4px; background: #2a6bf0;
  border-radius: 2px; margin: 0 auto 40px;
}
.section-content { font-size: 16px; color: #666; line-height: 1.8; max-width: 800px; margin: 0 auto; }

footer {
  background: #0056e6; color: #fff; text-align: center;
  padding: 30px 20px; font-size: 14px; line-height: 2;
}