:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --primary: #003b7a;
  --primary-soft: #e8f1ff;
  --text: #1e293b;
  --muted: #5b6472;
  --border: #dbe3ef;
  --accent: #0f766e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 0 0, #ecf4ff 0, var(--bg) 45%);
  line-height: 1.65;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

header {
  background: linear-gradient(130deg, #032e5d 0, #0e467f 55%, #1b6eb3 100%);
  color: #fff;
  padding: 18px 0 64px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.4px;
}

nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

nav a {
  color: #e9f1ff;
  text-decoration: none;
  font-weight: 600;
}

.lang-switch {
  border: 1px solid #9cc2ee;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
}

.hero {
  margin-top: 42px;
  display: grid;
  gap: 14px;
  max-width: 760px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.2;
}

.hero p {
  margin: 0;
  color: #d9e8ff;
  font-size: 1.05rem;
}

main {
  margin-top: -30px;
  padding-bottom: 56px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px;
  box-shadow: 0 14px 36px rgba(22, 43, 74, 0.08);
  margin-top: 18px;
}

h2 {
  margin: 0 0 10px;
  font-size: 1.4rem;
  color: #0d2c55;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card {
  background: #f8fbff;
  border: 1px solid #deebfb;
  border-radius: 14px;
  padding: 16px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.04rem;
}

.card p,
ul {
  margin: 0;
  color: var(--muted);
}

ul {
  padding-left: 20px;
}

.contact-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
  padding: 18px 0 28px;
}

.policy-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.lang-tabs {
  display: inline-flex;
  border: 1px solid #c7d8f0;
  border-radius: 10px;
  overflow: hidden;
  background: #f3f8ff;
}

.lang-tabs a {
  text-decoration: none;
  color: #0d2c55;
  font-weight: 700;
  padding: 8px 14px;
  border-right: 1px solid #c7d8f0;
}

.lang-tabs a:last-child {
  border-right: none;
}

.policy-meta {
  color: var(--muted);
  margin: 8px 0 0;
}

.policy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.policy-block {
  background: #f8fbff;
  border: 1px solid #deebfb;
  border-radius: 12px;
  padding: 14px 16px;
}

.policy-block h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

.policy-block p {
  margin: 0;
}

.policy-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.policy-list li + li {
  margin-top: 6px;
}

.policy-zh {
  display: none;
}

#zh:target ~ .policy-wrap .panel-policy-en {
  display: none;
}

#zh:target ~ .policy-wrap .panel-policy-zh {
  display: block;
}

#en:target ~ .policy-wrap .panel-policy-en {
  display: block;
}

#en:target ~ .policy-wrap .panel-policy-zh {
  display: none;
}

.only-zh {
  display: none;
}

body.zh .only-en {
  display: none;
}

body.zh .only-zh {
  display: initial;
}

@media (max-width: 860px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .contact-row {
    grid-template-columns: 1fr;
  }

  .policy-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}