:root {
  --onl-cyan: #0891B2;
  --onl-deep: #164E63;
  --onl-mist: #ECFEFF;
  --onl-ink: #083344;
  --onl-ice: #67E8F9;
  --onl-paper: #f4fdff;
  --onl-line: #b6e8ef;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  color: var(--onl-ink);
  background: var(--onl-mist);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

img,
svg {
  display: block;
}

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

a:hover {
  text-decoration: underline;
}

.onl-wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.onl-bar {
  background: var(--onl-ink);
  color: #ecfeff;
}

.onl-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 20px;
}

.onl-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #ecfeff;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.onl-brand svg {
  width: 28px;
  height: 28px;
}

.onl-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  justify-content: flex-end;
}

.onl-nav a {
  color: #a5f3fc;
  font-size: 14px;
}

.onl-hero {
  padding: 48px 0 28px;
}

.onl-hero-frame {
  background:
    linear-gradient(135deg, rgba(8, 145, 178, 0.12), transparent 42%),
    linear-gradient(180deg, #083344 0%, #164e63 100%);
  color: #ecfeff;
  border-radius: 6px;
  padding: 36px 40px 32px;
  box-shadow: 0 18px 0 #67e8f9;
}

.onl-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.3;
  max-width: 18em;
}

.onl-hero p {
  margin: 0;
  max-width: 42em;
  color: #cffafe;
}

.onl-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 36px 0 8px;
}

.onl-media-card {
  background: var(--onl-paper);
  border: 1px solid var(--onl-line);
  min-height: 248px;
  padding: 22px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.onl-media-card svg {
  width: 72px;
  height: 72px;
}

.onl-media-card h3 {
  margin: 0;
  font-size: 18px;
  color: var(--onl-deep);
}

.onl-media-card p {
  margin: 0;
  font-size: 15px;
}

.onl-sec {
  padding: 36px 0;
}

.onl-sec h2 {
  margin: 0 0 16px;
  color: var(--onl-deep);
  font-size: 26px;
  line-height: 1.35;
}

.onl-sec p {
  margin: 0 0 14px;
}

.onl-drop {
  margin: 20px 0;
  border: 3px dashed var(--onl-cyan);
  background:
    repeating-linear-gradient(
      45deg,
      #ecfeff,
      #ecfeff 10px,
      #d9f8fc 10px,
      #d9f8fc 20px
    );
  min-height: 168px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
}

.onl-drop strong {
  display: block;
  font-size: 20px;
  color: var(--onl-deep);
  margin-bottom: 8px;
}

.onl-drop span {
  color: #155e75;
}

.onl-steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  counter-reset: onlstep;
}

.onl-steps li {
  background: #fff;
  border-top: 6px solid var(--onl-ice);
  padding: 16px 14px 14px;
  min-height: 160px;
  counter-increment: onlstep;
}

.onl-steps li::before {
  content: counter(onlstep);
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--onl-cyan);
  line-height: 1;
  margin-bottom: 8px;
}

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

.onl-steps p {
  margin: 0;
  font-size: 14px;
}

.onl-table-wrap {
  overflow-x: auto;
  margin-top: 16px;
  border: 1px solid var(--onl-line);
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--onl-line);
  vertical-align: top;
}

th {
  background: var(--onl-deep);
  color: #ecfeff;
  font-weight: 600;
}

tr:nth-child(even) td {
  background: #f0fdff;
}

.onl-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.onl-panel {
  background: #fff;
  border-left: 6px solid var(--onl-cyan);
  padding: 16px 18px;
}

.onl-faq details {
  background: #fff;
  border: 1px solid var(--onl-line);
  margin-bottom: 10px;
  padding: 12px 16px;
}

.onl-faq summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--onl-deep);
}

.onl-faq details p {
  margin: 10px 0 0;
}

.onl-foot {
  background: var(--onl-ink);
  color: #a5f3fc;
  padding: 36px 0 28px;
  margin-top: 24px;
}

.onl-foot p {
  margin: 0 0 10px;
}

.onl-foot small {
  display: block;
  color: #67e8f9;
}

@media (max-width: 900px) {
  .onl-bar-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }

  .onl-nav {
    justify-content: flex-start;
  }

  .onl-showcase,
  .onl-steps,
  .onl-split {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .onl-hero-frame {
    padding: 24px 18px;
    box-shadow: 0 12px 0 #67e8f9;
  }

  .onl-showcase,
  .onl-steps,
  .onl-split {
    grid-template-columns: 1fr;
  }
}