body {
  font-family: 'Georgia', 'Times New Roman', Times, serif;
  background: #2c3e50;
  color: #222;
  margin: 0;
  padding: 0;
}
nav {
  background: #2c3e50;
  padding: 0.35em 0 0 0;
  margin: 0 auto;
  max-width: 1000px;
  width: calc(100% - 1.6em);
  box-sizing: border-box;
  position: relative;
  z-index: 3;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(44,62,80,0.08);
}
nav a {
  color: #fff;
  text-decoration: none;
  margin: 0;
  font-weight: bold;
  font-size: 1.05em;
  display: block;
  flex: 1 1 0;
  text-align: center;
  padding: 0.7em 1.2em 0.9em 1.2em;
  border-radius: 8px 8px 0 0;
  transition: all 0.3s ease;
  background: #34495e;
  box-shadow: inset 0 -2px 4px rgba(0, 0, 0, 0.2);
  border: 1px solid #2c3e50;
  border-bottom: none;
  position: relative;
  z-index: 1;
}
nav a .nav-cn,
nav a .nav-en {
  display: block;
  line-height: 1.15;
}
nav a .nav-cn {
  font-size: 0.94em;
  margin-bottom: 0.1em;
}
nav a .nav-en {
  font-size: 0.84em;
  font-weight: 600;
  opacity: 0.95;
}
nav a:nth-of-type(odd) {
  background: linear-gradient(180deg, #2a3d52 0%, #243349 100%);
}
nav a:nth-of-type(even) {
  background: linear-gradient(180deg, #40637f 0%, #365470 100%);
}
nav a:hover {
  background: linear-gradient(180deg, #1a5ca4 0%, #154a8a 100%) !important;
  box-shadow: 0 -2px 8px rgba(26, 92, 164, 0.3), inset 0 -2px 4px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}
nav a[aria-current="page"],
nav a[aria-current="page"]:hover {
  background: linear-gradient(180deg, #f3f7fc 0%, #ffffff 60%, #f3f7fc 100%) !important;
  color: #2c3e50;
  box-shadow: 0 -1px 6px rgba(255,255,255,0.25), inset 0 -1px 2px rgba(0, 0, 0, 0.05);
  border-color: #d5e0ec;
  border-bottom: 1px solid #f3f7fc;
  margin-bottom: -1px;
  transform: none;
  z-index: 2;
}
nav a:active {
  transform: translateY(0);
}
.container {
  max-width: 1000px;
  width: calc(100% - 1.6em);
  box-sizing: border-box;
  margin: -1px auto 0 auto;
  background: linear-gradient(180deg, #f3f7fc 0%, #ffffff 22%, #edf3fa 100%);
  padding: 2em 2.5em;
  border-radius: 0 0 14px 14px;
  border-top: none;
  border-left: 1px solid rgba(255,255,255,0.18);
  border-right: 1px solid rgba(255,255,255,0.18);
  border-bottom: 1px solid rgba(255,255,255,0.22);
  box-shadow: 0 12px 26px rgba(0,0,0,0.32), 0 2px 8px rgba(44,62,80,0.14);
}
h1, h2, h3 {
  color: #2c3e50;
}
footer {
  text-align: center;
  color: #ccc;
  font-size: 0.95em;
  margin: 0 auto 0 auto;
  background: #2c3e50;
  padding: 1.5em 2.5em;
  max-width: 1000px;
  width: calc(100% - 1.6em);
  box-sizing: border-box;
  border-radius: 0 0 14px 14px;
}