:root {
  --service-bg: #f3f5f7;
  --service-text: #4D545B;
  --service-muted: #4D545B;
  --service-line: #d6dbe2;
  --service-topbar: #2f353a;
  --service-blue: #0099cc;
  --service-blue-soft: #1db1e8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--service-bg);
  color: var(--service-text);
}

.service-topbar {
  min-height: 60px;
  background: var(--service-topbar);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 18px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.service-logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.service-logo-link img {
  width: 142px;
  height: auto;
  display: block;
}

.service-back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px 0 16px;
  border-radius: 10px;
  border: 0;
  background: #0099cc;
  color: #ffffff;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.22);
  transition: background 150ms ease, box-shadow 150ms ease;
}

.service-back-btn:hover {
  background: #0ba6db;
  box-shadow: 0 14px 26px rgba(0, 0, 0, 0.3);
}

.service-shell {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 36px 24px 56px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 44px;
}

.service-nav-title {
  margin: 0 0 14px;
  font-size: 1.95rem;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.service-nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-nav-list li + li {
  margin-top: 10px;
}

.service-nav-list a {
  color: var(--service-text);
  text-decoration: none;
  font-size: 1.05rem;
  line-height: 1.35;
}

.service-nav-list a:hover {
  color: var(--service-text);
  text-decoration: underline;
}

.service-nav-list a.is-active {
  color: var(--service-text);
  opacity: 0.74;
  cursor: default;
  pointer-events: none;
}

.service-content h1 {
  margin: 0;
  font-size: clamp(2rem, 3.5vw, 2.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.service-title-strong {
  font-weight: 800;
}

.service-lead {
  margin: 12px 0 0;
  color: var(--service-muted);
  line-height: 1.5;
  max-width: 78ch;
}

.service-section-list {
  margin-top: 22px;
}

.service-section {
  border-top: 1px solid var(--service-line);
  padding: 16px 0 18px;
}

.service-section:last-child {
  border-bottom: 1px solid var(--service-line);
}

.service-section h2 {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1.15;
}

.service-section h3 {
  margin: 14px 0 0;
  font-size: 1.2rem;
  line-height: 1.2;
}

.service-section p {
  margin: 8px 0 0;
  color: var(--service-text);
  line-height: 1.55;
}

.service-section ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--service-text);
  line-height: 1.55;
}

.service-section li + li {
  margin-top: 4px;
}

.service-faq-row {
  border-top: 1px solid var(--service-line);
  padding: 12px 0;
}

.service-faq-row:last-child {
  border-bottom: 1px solid var(--service-line);
}

.service-faq-row h2 {
  margin: 0;
  font-size: 1.45rem;
  font-weight: 800;
}

.service-faq-row p {
  margin: 8px 0 0;
}

.service-link {
  color: var(--service-text);
  text-decoration: underline;
}

.service-signature {
  margin: 10px 0 0;
  font-family: "Times New Roman", Georgia, serif;
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.2;
}

.service-support-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-support-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  color: var(--service-text);
  text-decoration: none;
  font-weight: 600;
}

.service-support-link:hover {
  text-decoration: underline;
}

.service-support-icon {
  height: 18px;
  width: auto;
  display: block;
  flex: 0 0 auto;
}

@media (max-width: 920px) {
  .service-shell {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 24px 16px 42px;
  }

  .service-nav-title {
    font-size: 1.5rem;
  }

  .service-nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .service-nav-list li + li {
    margin-top: 0;
  }

  .service-nav-list a {
    font-size: 0.96rem;
  }
}