:root {
  --ink: #1e2f41;
  --ink-soft: #2f4154;
  --muted: #5f6f7f;
  --brand: #1f5f93;
  --brand-dark: #16466c;
  --line: #d6e0ea;
  --line-strong: #bdd0e0;
  --panel: #ffffff;
  --panel-soft: #f6f9fc;
  --wash: linear-gradient(156deg, #edf3f8 0%, #ffffff 50%);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Lato", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--wash);
  line-height: 1.8;
}

.page-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 44px 28px 92px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.topbar a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 700;
}

.topbar a:hover { text-decoration: underline; }

.page-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 20px 48px rgba(16, 41, 66, 0.11);
}

.hero {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: flex-end;
  padding: 42px;
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(125deg, rgba(7, 27, 45, 0.9), rgba(31, 95, 147, 0.34));
}

.hero h1,
.hero p {
  position: relative;
  color: #fff;
  margin: 0;
  max-width: 840px;
}

.hero h1 {
  font-family: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(1.7rem, 3.4vw, 2.9rem);
  margin-bottom: 10px;
  line-height: 1.13;
  letter-spacing: -0.02em;
}

.hero p {
  opacity: 0.96;
  font-size: clamp(1rem, 1.7vw, 1.16rem);
}

.content {
  padding: 40px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 34px;
  align-items: start;
}

.article-main {
  display: grid;
  gap: 24px;
  max-width: 860px;
}

.article-rail {
  display: grid;
  gap: 18px;
}

.rail-card {
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
}

.rail-card.sticky {
  position: sticky;
  top: 16px;
}

.rail-card h2,
.rail-card h3 {
  margin: 0 0 12px;
  font-family: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand-dark);
}

.section-nav {
  display: grid;
  gap: 6px;
}

.section-nav a,
.local-nav a {
  display: block;
  padding: 9px 10px;
  border-radius: 7px;
  color: var(--brand);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.93rem;
}

.section-nav a.is-active {
  background: #dceaf6;
  color: var(--brand-dark);
}

.section-nav a:hover,
.local-nav a:hover {
  background: #e8f0f7;
}

.content-section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 30px 30px 24px;
}

.content-section.is-intro {
  border-color: var(--line-strong);
  background: linear-gradient(180deg, #f8fbfe 0%, #ffffff 100%);
  padding: 34px 32px 28px;
}

.content-section h2 {
  margin: 0 0 18px;
  font-family: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  color: var(--brand-dark);
  font-size: clamp(1.08rem, 2.1vw, 1.38rem);
  line-height: 1.3;
  padding-left: 12px;
  border-left: 3px solid #78a8cf;
}

.content-section p {
  margin: 0 0 22px;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 72ch;
}

.content-section.is-intro p {
  font-size: 1.1rem;
  color: #263a50;
}

.content-section.is-intro p + p {
  margin-top: 22px;
}

.content-section > ul,
.content-section > .bullet-list,
.content-section > .table-wrap,
.content-section > .faq-item,
.content-section > .jump-grid,
.content-section > .image-placeholder {
  max-width: 72ch;
}

.content-section > *:last-child {
  margin-bottom: 0;
}

.content-section b {
  color: #183f60;
}

.section-lead {
  font-size: 1.08rem;
  color: #21374d;
}

.jump-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.jump-link {
  display: block;
  border: 1px solid var(--line-strong);
  background: #f4f9fe;
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--brand-dark);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
}

.jump-link:hover {
  background: #eaf3fb;
}

.jump-link.is-static {
  color: #4f6071;
  background: #f7f9fb;
  border-style: dashed;
}

.content ul,
.content .bullet-list {
  margin: 2px 0 16px 24px;
}

.content li {
  margin-bottom: 10px;
  color: var(--ink-soft);
}

.step-title {
  margin-top: 20px;
  margin-bottom: 14px;
  border-left: 3px solid #6fa4ce;
  padding-left: 12px;
  font-family: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  color: var(--brand-dark);
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfdff;
  padding: 15px;
  margin: 12px 0;
}

.faq-question {
  margin: 0;
  font-family: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  font-size: 0.97rem;
  color: var(--brand-dark);
}

.faq-answer {
  margin-top: 10px;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 18px 0 24px;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.content table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  margin: 0;
  font-size: 0.95rem;
  background: #fff;
}

.content td,
.content th {
  border: 1px solid #d2dde7;
  padding: 12px;
  vertical-align: top;
}

.content tr:nth-child(even) {
  background: #fafcff;
}

.image-placeholder {
  border: 2px dashed #90b8d6;
  background: #eef6fd;
  color: #285f8d;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
  padding: 16px;
  margin: 20px 0;
  border-radius: 8px;
}

.local-nav {
  display: grid;
  gap: 6px;
}

.local-nav h2 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  color: var(--brand-dark);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: "Montserrat", "Helvetica Neue", Arial, sans-serif;
}

.reveal-up {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .article-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content {
    padding: 30px;
  }

  .article-main {
    max-width: none;
  }

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

  .rail-card.sticky {
    position: static;
  }
}

@media (max-width: 780px) {
  .page-shell {
    padding: 22px 14px 54px;
  }

  .content {
    padding: 24px 20px;
  }

  .hero {
    min-height: 220px;
    padding: 24px;
  }

  .article-rail {
    grid-template-columns: 1fr;
  }

  .content-section {
    padding: 24px 20px;
  }

  .content-section p {
    font-size: 1rem;
    margin-bottom: 18px;
    max-width: none;
  }

  .content-section.is-intro p {
    font-size: 1.03rem;
  }

  .content-section.is-intro {
    padding: 26px 22px;
  }

  .content-section.is-intro p + p {
    margin-top: 16px;
  }

  .content-section > ul,
  .content-section > .bullet-list,
  .content-section > .table-wrap,
  .content-section > .faq-item,
  .content-section > .jump-grid,
  .content-section > .image-placeholder {
    max-width: none;
  }

  .jump-link {
    font-size: 0.92rem;
  }
}