:root {
  color-scheme: light;
  --ink: #18243a;
  --muted: #57657a;
  --line: #dce3ed;
  --paper: #ffffff;
  --canvas: #f3f6fa;
  --blue: #2457d6;
  --blue-soft: #eaf0ff;
  --cyan: #46b6c8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 92% 2%, rgba(70, 182, 200, 0.18), transparent 23rem),
    linear-gradient(180deg, #f8faff 0%, var(--canvas) 100%);
  font-family: Inter, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
}

a {
  color: var(--blue);
}

.shell {
  width: min(70rem, calc(100% - 2rem));
  margin: 0 auto;
}

header {
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(220, 227, 237, 0.9);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-link {
  font-weight: 650;
  text-decoration: none;
}

main {
  padding: clamp(3.5rem, 8vw, 7rem) 0 5rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 1rem;
  color: var(--blue);
  font-size: 0.875rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--cyan);
  content: "";
}

h1 {
  max-width: 16ch;
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.055em;
}

.lead {
  max-width: 44rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}

.card,
.policy {
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.93);
  box-shadow: 0 1.25rem 4rem rgba(31, 52, 92, 0.08);
}

.card {
  min-height: 14rem;
  padding: clamp(1.35rem, 3vw, 2rem);
}

.card-number {
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

h2 {
  margin: 0.45rem 0 0.65rem;
  font-size: 1.35rem;
  line-height: 1.3;
}

.card p,
.policy p,
.policy li {
  color: var(--muted);
}

.notice {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-left: 0.25rem solid var(--blue);
  border-radius: 0.25rem 0.8rem 0.8rem 0.25rem;
  background: var(--blue-soft);
}

.actions {
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  padding: 0.65rem 1rem;
  border-radius: 0.75rem;
  background: var(--blue);
  color: #fff;
  font-weight: 720;
  text-decoration: none;
}

.policy {
  max-width: 52rem;
  padding: clamp(1.4rem, 4vw, 3rem);
}

.policy h1 {
  max-width: none;
  font-size: clamp(2.2rem, 6vw, 4rem);
}

.policy h2 {
  margin-top: 2rem;
}

.meta {
  margin: 0.7rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

@media (max-width: 42rem) {
  .grid {
    grid-template-columns: 1fr;
  }

  .footer-row {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}