:root {
  color-scheme: light;
  --ink: #10243f;
  --muted: #54657a;
  --line: #dbe6ef;
  --paper: #ffffff;
  --wash: #f4f9fc;
  --accent: #087f8c;
  --accent-strong: #05616a;
  --deep: #0b2942;
  --shadow: 0 18px 50px rgba(15, 42, 66, 0.1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 90% 4%, rgba(8, 127, 140, 0.13), transparent 28rem),
    linear-gradient(180deg, #f8fcfe 0, #fff 24rem);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a { color: var(--accent-strong); text-underline-offset: 0.2em; }

a:hover { color: var(--accent); }

.shell { width: min(1080px, calc(100% - 2rem)); margin: 0 auto; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  color: var(--deep);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.mark {
  display: grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 0.65rem;
  color: #fff;
  background: linear-gradient(145deg, var(--deep), var(--accent));
  box-shadow: 0 7px 20px rgba(8, 127, 140, 0.24);
}

.nav { display: flex; gap: 1.3rem; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 650; }
.nav a[aria-current="page"], .nav a:hover { color: var(--deep); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: 3.5rem;
  align-items: center;
  padding: 5.8rem 0 4.8rem;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: var(--accent-strong);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1, h2, h3 { color: var(--deep); line-height: 1.25; }
h1 { max-width: 14ch; margin: 0; font-size: clamp(2.5rem, 6vw, 5rem); letter-spacing: -0.045em; }
h2 { margin: 0 0 1.2rem; font-size: clamp(1.8rem, 3vw, 2.55rem); letter-spacing: -0.025em; }
h3 { margin: 0 0 0.55rem; font-size: 1.1rem; }

.lede { max-width: 44rem; margin: 1.4rem 0 0; color: var(--muted); font-size: 1.12rem; }

.trust-card {
  padding: 1.6rem;
  border: 1px solid rgba(8, 127, 140, 0.22);
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}

.trust-card strong { display: block; margin-bottom: 0.8rem; color: var(--deep); font-size: 1.15rem; }
.trust-card ul { margin: 0; padding-left: 1.25rem; color: var(--muted); }
.trust-card li + li { margin-top: 0.45rem; }

.section { padding: 4.2rem 0; border-top: 1px solid var(--line); }
.section-copy { max-width: 48rem; color: var(--muted); }

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

.card {
  padding: 1.45rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--paper);
}

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

.policy {
  width: min(850px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 4.7rem 0 5.5rem;
}

.policy h1 { max-width: none; font-size: clamp(2.4rem, 5vw, 4.2rem); }
.policy h2 { margin-top: 3rem; font-size: 1.55rem; }
.policy p, .policy li { color: var(--muted); }
.policy li + li { margin-top: 0.55rem; }

.meta {
  display: inline-block;
  margin: 1rem 0 2rem;
  padding: 0.35rem 0.72rem;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--muted);
  background: var(--wash);
  font-size: 0.9rem;
}

.notice {
  margin: 2rem 0;
  padding: 1.25rem 1.35rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 0.8rem 0.8rem 0;
  background: var(--wash);
  color: var(--muted);
}

.footer {
  padding: 2.2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-row { display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }

@media (max-width: 760px) {
  .site-header { align-items: flex-start; padding: 1rem 0; }
  .nav { justify-content: flex-end; gap: 0.8rem; font-size: 0.92rem; }
  .hero { grid-template-columns: 1fr; gap: 2rem; padding: 3.8rem 0; }
  .grid { grid-template-columns: 1fr; }
  .section { padding: 3.2rem 0; }
}

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