:root {
  --ice: #0E7490;
  --ice-2: #155E75;
  --mist: #ECFEFF;
  --panel: #FFFFFF;
  --ink: #164E63;
  --muted: #3F6B78;
  --line: #A5F3FC;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--mist);
  color: var(--ink);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  font-size: 16px;
}

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

a:hover {
  text-decoration: underline;
}

.top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--ice);
  color: #fff;
}

.brand,
.nav {
  padding: 16px 28px;
}

.brand {
  font-weight: 700;
  border-right: 1px solid rgba(255, 255, 255, 0.25);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: center;
}

.nav a {
  color: #fff;
  font-size: 13px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 220px;
}

.hero .pane {
  padding: 36px 28px;
}

.hero .pane:first-child {
  background: var(--ice-2);
  color: #ECFEFF;
}

.hero h1 {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.3;
}

.hero p {
  margin: 0 0 12px;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--line);
}

.split .pane {
  padding: 28px;
  background: var(--panel);
}

.split .pane:first-child {
  border-right: 1px solid var(--line);
  background: #F0FDFF;
}

.split.flip .pane:first-child {
  background: var(--panel);
}

.split.flip .pane:last-child {
  background: #F0FDFF;
}

.split h2 {
  margin: 0 0 12px;
  font-size: 21px;
  color: var(--ice);
}

.split p {
  margin: 0 0 12px;
  color: var(--muted);
}

.visual {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.svg-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
}

.svg-card svg {
  display: block;
  margin-bottom: 8px;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.steps li {
  list-style: none;
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 10px;
  align-items: start;
  font-size: 14px;
}

.steps b {
  color: var(--ice);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  border: 1px solid var(--line);
  padding: 8px;
  text-align: left;
}

th {
  background: #CFFAFE;
  color: var(--ice-2);
}

.faq {
  padding: 28px;
  background: #fff;
}

.faq h2 {
  color: var(--ice);
  margin: 0 0 16px;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.faq article {
  padding: 14px 18px 14px 0;
  border-top: 1px solid var(--line);
}

.faq h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.faq p {
  margin: 0 0 8px;
  color: var(--muted);
}

.foot {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  background: var(--ice);
  color: #ECFEFF;
  font-size: 13px;
}

.foot p {
  margin: 0;
  padding: 18px 22px;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.foot p:last-child {
  border-right: 0;
}

@media (max-width: 860px) {
  .top,
  .hero,
  .split,
  .faq-grid,
  .foot {
    grid-template-columns: 1fr;
  }

  .brand {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  }

  .split .pane:first-child,
  .foot p {
    border-right: 0;
  }
}