.manual-hero {
  position: relative;
  padding-top: clamp(64px, 8vw, 112px);
  padding-bottom: clamp(54px, 7vw, 92px);
  overflow-x: clip;
  background:
    linear-gradient(180deg, var(--color-bg-deep), var(--color-bg)),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.manual-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(var(--color-grid-line) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid-line) 1px, var(--color-transparent) 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, var(--color-transparent), var(--color-text), var(--color-transparent));
  opacity: 0.44;
}

.manual-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(42px, 7vw, 96px);
  align-items: center;
}

.manual-hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.manual-hero-copy h1 {
  max-width: 780px;
  margin-top: 18px;
}

.manual-hero-copy .lead {
  max-width: 660px;
}

.manual-links {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 30px;
}

.diagnostic-frame {
  position: relative;
  min-width: 0;
  min-height: 390px;
  padding: 66px 52px;
  overflow: hidden;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-panel);
}

.diagnostic-frame::before {
  position: absolute;
  inset: 20px;
  content: "";
  background:
    radial-gradient(circle at 18% 54%, var(--color-aurora-blue), var(--color-transparent) 27%),
    radial-gradient(circle at 48% 45%, var(--color-aurora-green), var(--color-transparent) 30%),
    radial-gradient(circle at 82% 53%, var(--color-aurora-orange), var(--color-transparent) 28%);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-lg);
  filter: blur(18px);
  opacity: 0.76;
}

.diagnostic-frame::after {
  position: absolute;
  inset: 20px;
  content: "";
  background:
    linear-gradient(180deg, var(--color-scene-shade), var(--color-scene-clear), var(--color-scene-shade)),
    repeating-linear-gradient(90deg, var(--color-transparent) 0 69px, var(--color-grid-line) 69px 70px);
  border: 1px solid var(--color-border-glass);
  border-radius: var(--radius-lg);
}

.diagnostic-bracket {
  position: absolute;
  z-index: 4;
  width: 64px;
  height: 64px;
  border-color: var(--color-text);
  border-style: solid;
}

.diagnostic-bracket-tl {
  top: 0;
  left: 0;
  border-width: 11px 0 0 11px;
  border-radius: var(--radius-lg) 0 0;
}

.diagnostic-bracket-tr {
  top: 0;
  right: 0;
  border-width: 11px 11px 0 0;
  border-radius: 0 var(--radius-lg) 0 0;
}

.diagnostic-bracket-bl {
  bottom: 0;
  left: 0;
  border-width: 0 0 11px 11px;
  border-radius: 0 0 0 var(--radius-lg);
}

.diagnostic-bracket-br {
  right: 0;
  bottom: 0;
  border-width: 0 11px 11px 0;
  border-radius: 0 0 var(--radius-lg);
}

.diagnostic-path {
  position: relative;
  z-index: 5;
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  margin-top: 44px;
}

.diagnostic-path span {
  display: inline-flex;
  min-width: 72px;
  min-height: 32px;
  padding: 0 10px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  background: var(--color-panel-glass-strong);
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 10px;
  white-space: nowrap;
}

.diagnostic-path i {
  position: relative;
  width: 34px;
  height: 1px;
  flex: 1 1 auto;
  background: var(--color-accent-line);
}

.diagnostic-path i::after {
  position: absolute;
  top: -3px;
  right: 0;
  width: 7px;
  height: 7px;
  content: "";
  background: var(--color-accent);
  border-radius: var(--radius-pill);
}

.diagnostic-terminal {
  position: relative;
  z-index: 5;
  display: grid;
  gap: 6px;
  max-width: 340px;
  margin: 62px auto 0;
  padding: 18px;
  text-align: left;
  background: var(--color-panel-glass-strong);
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.diagnostic-terminal span,
.diagnostic-terminal small {
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.07em;
}

.diagnostic-terminal strong {
  font-size: 17px;
}

.manual-facts {
  position: relative;
  margin-top: clamp(42px, 6vw, 72px);
}

.manual-index-section {
  position: relative;
  z-index: 12;
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
}

.manual-intro {
  background: var(--color-bg-deep);
}

.manual-intro-title {
  font-size: clamp(27px, 3vw, 40px);
}

.manual-intro a,
.chapter-body a {
  color: var(--color-accent-soft);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-line);
  text-underline-offset: 0.2em;
}

.manual-document {
  min-width: 0;
}

.manual-chapter {
  display: grid;
  grid-template-columns: minmax(190px, 0.34fr) minmax(0, 1fr);
  gap: clamp(44px, 8vw, 116px);
  align-items: start;
}

.chapter-rail {
  position: sticky;
  top: var(--toc-offset);
  min-width: 0;
  padding-top: 7px;
}

.chapter-rail::after {
  display: block;
  width: 58px;
  height: 1px;
  margin-top: 24px;
  content: "";
  background: linear-gradient(90deg, var(--color-accent), var(--color-transparent));
}

.chapter-rail strong {
  display: block;
  margin-bottom: 10px;
  color: var(--color-text);
  font-size: 17px;
}

.chapter-rail p {
  margin: 0;
  color: var(--color-text-dim);
  font-size: 13px;
}

.chapter-body {
  width: min(100%, 850px);
}

.chapter-body > h2 {
  margin-top: 0;
}

.chapter-body h3 {
  margin-top: 2em;
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
}

.chapter-body p {
  line-height: 1.9;
}

.diagnostic-table {
  min-width: 720px;
}

.comparison-band,
.support-decision {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0;
  overflow: hidden;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.comparison-band > div,
.support-decision > div {
  min-width: 0;
  padding: 22px;
  background: var(--color-panel);
}

.comparison-band strong,
.support-decision strong {
  display: block;
  margin-bottom: 8px;
}

.comparison-band p,
.support-decision p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

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

.ticket-template {
  margin: 30px 0;
  padding: 24px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.ticket-template pre {
  margin-bottom: 0;
}

@media (max-width: 1040px) {
  .manual-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .diagnostic-frame {
    min-height: 340px;
  }

  .manual-chapter {
    grid-template-columns: minmax(160px, 0.28fr) minmax(0, 1fr);
    gap: 50px;
  }
}

@media (max-width: 768px) {
  .manual-hero {
    padding-top: 54px;
  }

  .diagnostic-frame {
    min-height: 300px;
    padding: 50px 28px;
  }

  .diagnostic-path {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 22px;
  }

  .diagnostic-path span {
    min-width: 0;
  }

  .diagnostic-path i {
    display: none;
  }

  .diagnostic-terminal {
    margin-top: 34px;
  }

  .manual-chapter {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
  }

  .chapter-rail {
    position: static;
    padding: 0 0 22px;
    border-bottom: 1px solid var(--color-border);
  }

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

  .comparison-band {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  .manual-links {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .manual-links .button {
    width: 100%;
  }

  .diagnostic-frame {
    min-height: 286px;
    padding: 42px 18px;
  }

  .diagnostic-frame::before,
  .diagnostic-frame::after {
    inset: 14px;
  }

  .diagnostic-bracket {
    width: 48px;
    height: 48px;
  }

  .diagnostic-terminal {
    padding: 14px;
  }

  .support-decision {
    grid-template-columns: minmax(0, 1fr);
  }

  .ticket-template {
    padding: 16px;
  }
}