.guide-hero {
  position: relative;
  padding-top: clamp(72px, 10vw, 128px);
  padding-bottom: clamp(56px, 8vw, 92px);
  overflow: clip;
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(var(--color-line), var(--color-line)) top left / 100% 1px no-repeat,
    radial-gradient(circle at 82% 22%, var(--color-glow), transparent 34%),
    var(--color-canvas);
}

.guide-hero::before,
.guide-hero::after {
  position: absolute;
  z-index: 0;
  border: 1px solid var(--color-line);
  content: "";
  pointer-events: none;
}

.guide-hero::before {
  top: 54px;
  right: max(var(--gutter), calc((100vw - var(--page-max)) / 2));
  width: min(28vw, 340px);
  height: min(28vw, 340px);
  border-radius: var(--radius-pill);
}

.guide-hero::after {
  top: 104px;
  right: calc(max(var(--gutter), (100vw - var(--page-max)) / 2) + 48px);
  width: min(20vw, 244px);
  height: min(20vw, 244px);
  border-color: var(--color-accent);
  border-radius: var(--radius-pill);
  opacity: 0.22;
}

.guide-hero .reading-wrap {
  position: relative;
  z-index: 1;
}

.guide-hero .badge {
  margin-bottom: 28px;
}

.guide-hero .eyebrow {
  margin-bottom: 12px;
}

.guide-hero h1 {
  max-width: 780px;
  margin-bottom: 24px;
}

.guide-hero-lead {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.78;
}

.guide-hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.guide-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 900px;
  margin: 42px 0 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.guide-facts div {
  min-width: 0;
  padding: 20px 18px;
  border-right: 1px solid var(--color-line);
}

.guide-facts div:first-child {
  padding-left: 0;
}

.guide-facts div:last-child {
  border-right: 0;
}

.guide-facts dt {
  margin-bottom: 6px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.guide-facts dd {
  margin: 0;
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.45;
}

.guide-relationship {
  max-width: 840px;
  margin-top: 30px;
  color: var(--color-muted);
  line-height: 1.85;
}

.guide-relationship a,
.deepdoc-article p a {
  color: var(--color-accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 0.2em;
}

.deepdoc-layout {
  display: grid;
  grid-template-columns: 208px minmax(0, var(--reading-max));
  justify-content: center;
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
  padding-top: clamp(48px, 7vw, 82px);
  padding-bottom: var(--section-space);
}

.deepdoc-toc {
  top: 18px;
  display: grid;
  align-content: start;
  gap: 4px;
  padding: 10px;
  overflow: visible;
}

.deepdoc-toc a {
  width: 100%;
  min-height: 42px;
  justify-content: flex-start;
  padding-inline: 13px;
}

.deepdoc-article {
  width: 100%;
  max-width: var(--reading-max);
  margin-inline: auto;
}

.guide-chapter {
  padding-top: 18px;
  padding-bottom: clamp(62px, 8vw, 94px);
  border-bottom: 1px solid var(--color-line);
}

.guide-chapter:first-child {
  padding-top: 0;
}

.guide-chapter:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.chapter-head {
  position: relative;
  margin-bottom: 34px;
  padding: 25px 28px 26px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.chapter-head::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 74px;
  height: 100%;
  border-left: 1px solid var(--color-line);
  background:
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 13px,
      var(--color-line) 13px,
      var(--color-line) 14px
    );
  content: "";
  opacity: 0.72;
}

.chapter-index {
  display: block;
  margin-bottom: 10px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.09em;
}

.chapter-head h2 {
  position: relative;
  z-index: 1;
  max-width: calc(100% - 70px);
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 44px);
}

.deepdoc-article h3 {
  margin-top: 38px;
  margin-bottom: 14px;
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
  font-size: clamp(21px, 2.2vw, 26px);
}

.deepdoc-article p {
  margin-bottom: 20px;
  color: var(--color-muted);
  font-size: 17px;
  line-height: 1.95;
}

.deepdoc-article .callout {
  margin: 30px 0;
  line-height: 1.8;
}

.deepdoc-article .table-scroll {
  margin: 30px 0 36px;
}

.deepdoc-article .compare-table {
  min-width: 760px;
}

.deepdoc-article .compare-table td {
  color: var(--color-muted);
  line-height: 1.65;
}

.deepdoc-article .compare-table td:first-child {
  color: var(--color-ink);
  font-weight: 750;
}

.decision-record {
  margin: 34px 0;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  box-shadow: var(--shadow-panel);
}

.decision-record h3 {
  margin-top: 0;
  padding-left: 0;
  border-left: 0;
}

.decision-record dl {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--color-line);
}

.decision-record dl div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
}

.decision-record dl div:last-child {
  border-bottom: 0;
}

.decision-record dt {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.decision-record dd {
  margin: 0;
  color: var(--color-muted);
}

@media (max-width: 980px) {
  .guide-hero::before,
  .guide-hero::after {
    display: none;
  }

  .deepdoc-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .deepdoc-toc {
    top: 8px;
    display: flex;
    width: 100%;
    gap: 5px;
    padding: 6px;
    overflow-x: auto;
  }

  .deepdoc-toc a {
    width: auto;
    flex: 0 0 auto;
  }
}

@media (max-width: 768px) {
  .guide-hero {
    padding-top: 58px;
    padding-bottom: 58px;
  }

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

  .guide-facts div {
    border-bottom: 1px solid var(--color-line);
  }

  .guide-facts div:nth-child(2) {
    border-right: 0;
  }

  .guide-facts div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .guide-facts div:nth-child(3) {
    padding-left: 0;
  }

  .chapter-head {
    padding: 22px;
  }

  .chapter-head::after {
    width: 48px;
  }

  .chapter-head h2 {
    max-width: calc(100% - 40px);
  }

  .deepdoc-article p {
    font-size: 16px;
    line-height: 1.9;
  }
}

@media (max-width: 640px) {
  .guide-hero-links {
    align-items: stretch;
    flex-direction: column;
  }

  .guide-hero-links .btn {
    width: 100%;
  }

  .deepdoc-layout {
    padding-top: 36px;
  }

  .guide-chapter {
    padding-bottom: 64px;
  }

  .chapter-head {
    padding: 20px;
  }

  .chapter-head::after {
    display: none;
  }

  .chapter-head h2 {
    max-width: 100%;
  }

  .deepdoc-article h3 {
    margin-top: 32px;
    padding-left: 12px;
  }

  .decision-record dl div {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

@media (max-width: 420px) {
  .guide-facts {
    grid-template-columns: 1fr;
  }

  .guide-facts div,
  .guide-facts div:nth-child(2),
  .guide-facts div:nth-child(3) {
    padding-left: 0;
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .guide-facts div:last-child {
    border-bottom: 0;
  }
}