:root {
  --main: #1a56af;
  --main-deep: #1656b0;
  --bg: #f8fafc;
  --text: #333;
  --muted: #757575;
  --line: #e6e8eb;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--text);
  background: #fff;
}
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }

.topbar {
  height: 72px;
  background: var(--main);
  display: flex;
  align-items: center;
  padding: 0 48px;
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { display: flex; align-items: center; gap: 8px; color: #fff; flex-shrink: 0; }
.logo-ph {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid #fff;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .5px;
}
.brand-name { font-size: 18px; font-weight: 700; }
.nav { display: flex; align-items: center; gap: 8px; margin-left: 36px; flex: 1; }
.nav a {
  color: #fff;
  font-size: 16px;
  padding: 0 18px;
  line-height: 72px;
}
.nav a.active, .nav a:hover { background: #2269d1; }
.login-btn {
  background: #fff;
  color: var(--main);
  border: 0;
  height: 36px;
  padding: 0 22px;
  font-size: 16px;
  cursor: pointer;
}
.login-btn:hover { background: #eef4ff; }

.wrap { width: 1280px; margin: 0 auto; }
.section-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #fff;
  font-size: 32px;
  font-weight: 700;
}
.section-title i { display: block; height: 4px; }
.section-title .short { width: 8px; background: rgba(255,255,255,.5); }
.section-title .long { width: 46px; background: #fff; }

.site-footer {
  background: var(--main);
  color: #fff;
  min-height: 280px;
  display: flex;
  align-items: center;
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 48px 0;
  gap: 40px;
}
.footer-brand { display: flex; align-items: center; gap: 16px; font-size: 22px; font-weight: 700; }
.footer-brand .logo-ph { width: 64px; height: 64px; font-size: 18px; }
.footer-meta { font-size: 14px; line-height: 2; text-align: right; }
.footer-meta span { opacity: .95; }