:root {
  --ink: #17313d;
  --soft: #4e6570;
  --paper: #f3f7f5;
  --surface: #ffffff;
  --line: #dce7e3;
  --navy: #153543;
  --mint: #c8f0df;
  --sun: #f8cc57;
  --font: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
}

a {
  color: #1d69a3;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 12px max(20px, calc((100vw - 1080px) / 2));
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: block;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--navy);
}

.brand-mark::before {
  content: "";
  position: absolute;
  top: 15px;
  left: 4px;
  width: 26px;
  height: 8px;
  border: 1px solid #fff;
  border-radius: 50%;
  transform: rotate(-18deg);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 12px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #ff9d7d;
}

nav {
  display: flex;
  gap: 22px;
  font-size: 13px;
}

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

nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 78px 20px 68px;
}

.eyebrow,
.section-label {
  color: #55717d;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.hero h1,
.policy-heading h1 {
  max-width: 820px;
  margin: 10px 0 18px;
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.hero p {
  max-width: 680px;
  color: var(--soft);
  font-size: 16px;
}

.primary-link {
  display: inline-flex;
  margin-top: 22px;
  padding: 10px 15px;
  border-radius: 8px;
  color: #fff;
  background: var(--navy);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.content-band,
.contact-band {
  display: grid;
  grid-template-columns: minmax(220px, 0.6fr) minmax(0, 1.4fr);
  gap: 50px;
  padding: 40px max(20px, calc((100vw - 1080px) / 2));
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.content-band:nth-of-type(3) {
  background: #edf8f3;
}

h2 {
  margin: 4px 0 0;
  font-size: 24px;
  line-height: 1.4;
}

.content-copy p,
.faq p,
.contact-band p {
  margin: 0;
  color: var(--soft);
}

.text-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  font-weight: 700;
}

.faq {
  border-top: 1px solid var(--line);
}

details {
  border-bottom: 1px solid var(--line);
}

summary {
  padding: 16px 0;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

details p {
  padding: 0 0 16px;
  font-size: 13px;
}

.contact-band {
  background: #fff9e8;
}

.contact-band p + p {
  margin-top: 7px;
}

.policy {
  max-width: 880px;
  margin: 0 auto;
  padding: 56px 20px 80px;
}

.policy-heading {
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.policy-heading h1 {
  font-size: clamp(30px, 4vw, 46px);
}

.policy-heading p {
  margin: 4px 0;
  color: var(--soft);
  font-size: 12px;
}

.policy section {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.policy section h2 {
  margin-bottom: 12px;
  font-size: 20px;
}

.policy p,
.policy li {
  color: var(--soft);
  font-size: 14px;
}

.policy ul {
  padding-left: 22px;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 22px max(20px, calc((100vw - 1080px) / 2));
  color: #71858b;
  background: var(--navy);
  font-size: 10px;
}

footer a {
  color: #dceae5;
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  nav {
    gap: 16px;
  }

  .hero {
    padding-top: 48px;
    padding-bottom: 44px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .content-band,
  .contact-band {
    grid-template-columns: 1fr;
    gap: 14px;
    padding-top: 30px;
    padding-bottom: 30px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }
}