:root {
  --bg-top: #7ec8f5;
  --bg-mid: #3a9fd8;
  --bg-deep: #1a6fa8;
  --surface: #ffffff;
  --text: #12344a;
  --muted: #4a6b7c;
  --accent: #0d7abf;
  --card: rgba(255, 255, 255, 0.94);
  --shadow: 0 18px 40px rgba(18, 80, 120, 0.18);
  --radius: 20px;
  --max: 720px;
  font-family: "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 42%, var(--bg-deep) 100%);
  background-attachment: fixed;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 18px 48px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand:hover {
  text-decoration: none;
  opacity: 0.92;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 1.2rem;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.42);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.chip:hover {
  background: rgba(255, 255, 255, 0.4);
  text-decoration: none;
}

.chip.active {
  background: #fff;
  color: var(--accent);
}

.hero {
  color: #fff;
  margin-bottom: 22px;
}

.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  font-weight: 900;
  letter-spacing: 0.02em;
}

.hero p {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  opacity: 0.95;
  max-width: 36em;
  line-height: 1.55;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px 22px 30px;
}

.card h1 {
  margin: 0 0 8px;
  font-size: 1.65rem;
  font-weight: 900;
}

.meta {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 22px;
}

.card h2 {
  margin: 1.5em 0 0.55em;
  font-size: 1.15rem;
  font-weight: 800;
}

.card h3 {
  margin: 1.15em 0 0.4em;
  font-size: 1.02rem;
  font-weight: 700;
}

.card p,
.card li {
  line-height: 1.7;
  color: var(--text);
}

.card ul {
  padding-left: 1.2em;
  margin: 0.4em 0 0.8em;
}

.card strong {
  font-weight: 800;
}

.links {
  display: grid;
  gap: 12px;
  margin-top: 8px;
}

.link-card {
  display: block;
  padding: 16px 18px;
  border-radius: 16px;
  background: linear-gradient(135deg, #eef8ff, #f7fbff);
  border: 1px solid #d5ebf8;
  color: var(--text);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(26, 111, 168, 0.12);
  text-decoration: none;
}

.link-card strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--accent);
}

.link-card span {
  color: var(--muted);
  font-size: 0.92rem;
}

.contact {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid #dbeaf3;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer {
  margin-top: 22px;
  text-align: center;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.88rem;
  font-weight: 600;
}

.footer a {
  color: #fff;
  text-decoration: underline;
}