:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  color: #22334d;
  background: #edf4fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 5%, rgba(90, 170, 255, .22), transparent 34%),
    linear-gradient(155deg, #f8fbff 0%, #e9f3fc 50%, #dfeefa 100%);
}

.wrap {
  width: min(920px, calc(100% - 28px));
  margin: 0 auto;
  padding: 36px 0;
}

.card {
  padding: 34px clamp(22px, 5vw, 62px);
  border: 1px solid #d8e5f2;
  border-radius: 24px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 18px 50px rgba(49, 89, 132, .14);
}

h1 {
  margin: 0 0 18px;
  color: #173e72;
  font-size: clamp(30px, 5vw, 44px);
  letter-spacing: .05em;
}

.nav {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.nav a {
  padding: 9px 16px;
  border-radius: 999px;
  color: #315f91;
  background: #edf5fd;
  text-decoration: none;
}

.nav a.active {
  color: #fff;
  background: #2676c9;
}

.meta {
  padding: 13px 16px;
  border-left: 4px solid #4aa3e8;
  border-radius: 8px;
  color: #53677e;
  background: #f3f8fd;
  line-height: 1.8;
}

.notice {
  margin: 24px 0;
  padding: 18px;
  border: 1px solid #f1d7a3;
  border-radius: 14px;
  color: #634a20;
  background: #fff9ec;
}

.lead { font-size: 17px; }

h2 {
  margin: 30px 0 10px;
  color: #22598f;
  font-size: 20px;
}

p {
  margin: 10px 0;
  line-height: 1.9;
  text-align: justify;
}

.mail { color: #176dc0; }

.footer {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid #e5edf5;
  color: #7a8998;
  text-align: center;
}

@media (max-width: 560px) {
  .wrap { width: min(100% - 16px, 920px); padding: 12px 0; }
  .card { padding: 24px 18px; border-radius: 16px; }
  .nav { flex-wrap: wrap; }
  .meta { font-size: 14px; }
}