:root {
  --blue: #1565a8;
  --ice: #f3f8fc;
  --ink: #10283d;
  --white: #ffffff;
  --line: #d5e4f0;
  --muted: #4a6578;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--ice);
  line-height: 1.75;
  font-size: 16px;
}

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

a:hover {
  text-decoration: underline;
}

img, svg {
  max-width: 100%;
  vertical-align: middle;
}

.site-header {
  background: var(--white);
  border-bottom: 4px solid var(--blue);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 20px 10px;
  text-align: center;
}

.brand {
  display: inline-block;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin: 0 0 8px;
}

.brand a {
  color: inherit;
  text-decoration: none;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  padding-bottom: 6px;
}

.nav a {
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
  text-decoration: none;
}

.nav a:hover,
.nav a.active {
  color: var(--blue);
  border-bottom-color: var(--blue);
  text-decoration: none;
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.hero {
  text-align: center;
  padding: 8px 0 18px;
}

.hero-svg {
  display: block;
  margin: 0 auto 18px;
  width: min(100%, 420px);
  height: auto;
}

h1 {
  margin: 0 auto 14px;
  max-width: 18em;
  font-size: 40px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
  text-align: center;
}

.lead {
  max-width: 40em;
  margin: 0 auto 22px;
  color: var(--muted);
  font-size: 17px;
  text-align: center;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 18px 0 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 148px;
  padding: 11px 22px;
  border-radius: 999px;
  background: var(--blue);
  color: var(--white) !important;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none !important;
  border: 2px solid var(--blue);
  transition: background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  background: var(--white);
  color: var(--blue) !important;
}

.btn-ghost {
  background: var(--white);
  color: var(--blue) !important;
}

.btn-ghost:hover {
  background: var(--blue);
  color: var(--white) !important;
}

.tri-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 8px 0 28px;
  border: 1px solid var(--line);
  background: var(--white);
  overflow: hidden;
}

.tri-item {
  padding: 18px 14px;
  text-align: center;
  border-right: 1px solid var(--line);
}

.tri-item:last-child {
  border-right: none;
}

.tri-item strong {
  display: block;
  font-size: 18px;
  color: var(--blue);
  margin-bottom: 6px;
}

.tri-item span {
  display: block;
  font-size: 14px;
  color: var(--muted);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0 0 36px;
}

.step {
  background: var(--white);
  border-top: 3px solid var(--blue);
  padding: 18px 16px 16px;
  text-align: center;
}

.step .num {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.step p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.section {
  margin: 0 0 34px;
  background: var(--white);
  padding: 26px 28px 22px;
  border-left: 4px solid var(--blue);
}

.section h2 {
  margin: 0 0 14px;
  font-size: 24px;
  color: var(--ink);
  text-align: center;
}

.section p {
  margin: 0 0 14px;
  color: var(--ink);
  text-align: justify;
}

.section p:last-child {
  margin-bottom: 0;
}

.news-wrap {
  margin: 0 0 36px;
}

.news-wrap h2 {
  text-align: center;
  font-size: 24px;
  margin: 0 0 16px;
}

.news-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.news-card {
  flex: 1 1 calc(50% - 14px);
  min-width: 280px;
  background: var(--white);
  padding: 16px 18px;
  border-bottom: 3px solid var(--blue);
}

.news-card time {
  display: block;
  font-size: 13px;
  color: var(--blue);
  margin-bottom: 6px;
  font-weight: 600;
}

.news-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.45;
}

.news-card p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.faq-wrap {
  margin: 0 0 28px;
}

.faq-wrap h2 {
  text-align: center;
  font-size: 24px;
  margin: 0 0 16px;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.faq-item {
  background: var(--white);
  padding: 16px 18px;
  border-top: 2px solid var(--line);
}

.faq-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--blue);
  line-height: 1.4;
}

.faq-item p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.note {
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  margin: 8px 0 24px;
}

.site-footer {
  background: var(--white);
  border-top: 4px solid var(--blue);
  padding: 22px 20px 28px;
  text-align: center;
}

.site-footer p {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--muted);
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

@media (max-width: 760px) {
  h1 {
    font-size: 28px;
  }

  .tri-strip {
    grid-template-columns: 1fr;
  }

  .tri-item {
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .tri-item:last-child {
    border-bottom: none;
  }

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

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

  .section {
    padding: 20px 16px;
  }

  .nav {
    gap: 16px;
  }
}