.page-guides-basic {
  color: var(--color-ink);
  background: var(--color-surface);
  overflow-x: hidden;
}

/* ---------- 首屏区 ---------- */
.page-guides-basic .gb-head {
  position: relative;
  overflow: hidden;
  background: var(--color-surface);
  border-bottom: 1px dotted var(--color-line);
}

.page-guides-basic .gb-head__slab {
  position: absolute;
  inset: 0;
  background: linear-gradient(114deg, var(--color-primary-soft) 0%, var(--color-surface-alt) 46%, var(--color-surface) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 0 100%);
  pointer-events: none;
}

.page-guides-basic .gb-head__inner {
  position: relative;
  padding-block: var(--space-4) var(--space-8);
}

.page-guides-basic .gb-head .breadcrumbs {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-guides-basic .gb-head .breadcrumbs a {
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-head .breadcrumbs a:hover {
  color: var(--color-primary);
}

.page-guides-basic .gb-head__grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-guides-basic .section-label {
  color: var(--color-primary);
  letter-spacing: 0.12em;
}

.page-guides-basic .gb-head__title {
  margin-top: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  text-wrap: balance;
}

.page-guides-basic .gb-head__lede {
  max-width: var(--measure);
  margin-top: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-head__meta {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  margin: 0;
}

.page-guides-basic .gb-head__meta dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-guides-basic .gb-head__meta dd {
  margin: 3px 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* ---------- 通用排版 ---------- */
.page-guides-basic h2 {
  margin-top: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-guides-basic h3 {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-guides-basic p {
  line-height: var(--leading-body);
}

.page-guides-basic a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-primary);
}

.page-guides-basic a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-guides-basic .gb-scope,
.page-guides-basic .gb-routes,
.page-guides-basic .gb-fields,
.page-guides-basic .gb-next {
  padding-block: var(--section-y-lg);
  background: var(--color-surface);
}

.page-guides-basic .gb-entry,
.page-guides-basic .gb-recover {
  padding-block: var(--section-y);
  background: var(--color-surface-alt);
  border-block: 1px dotted var(--color-line);
}

.page-guides-basic .gb-routes {
  border-bottom: 1px dotted var(--color-line);
}

.page-guides-basic .media-frame__slot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

/* ---------- 01 适用范围 ---------- */
.page-guides-basic .gb-scope__body {
  max-width: var(--measure);
  margin-top: var(--space-4);
}

.page-guides-basic .gb-scope__body p + p {
  margin-top: var(--space-3);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-scope__body .quote {
  margin-block: var(--space-4);
}

.page-guides-basic .gb-scope__back {
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: 1px dotted var(--color-line);
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 02 入口与维度 ---------- */
.page-guides-basic .gb-entry__grid {
  display: grid;
  gap: var(--space-6);
}

.page-guides-basic .gb-entry__text > p {
  max-width: var(--measure);
  margin-top: var(--space-3);
}

.page-guides-basic .gb-entry__order {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: 1px dotted var(--color-line);
}

.page-guides-basic .gb-entry__order li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px dotted var(--color-line);
}

.page-guides-basic .gb-entry__num {
  color: var(--color-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  padding-top: 3px;
}

.page-guides-basic .gb-entry__cell {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-entry__cell strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-guides-basic .gb-entry__hint {
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--color-highlight);
  border-left: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-entry__hint .num {
  display: block;
  margin-bottom: 3px;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-guides-basic .gb-entry__figure {
  margin: 0;
}

/* ---------- 03 三种走法 ---------- */
.page-guides-basic .gb-routes__lede {
  max-width: var(--measure);
  margin-top: var(--space-3);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-walks {
  margin-top: var(--space-6);
  border-top: 1px solid var(--color-line);
}

.page-guides-basic .gb-walk {
  border-bottom: 1px dotted var(--color-line);
  transition: background-color 140ms ease;
}

.page-guides-basic .gb-walk[open] {
  background: var(--color-primary-soft);
}

.page-guides-basic .gb-walk__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-2);
  cursor: pointer;
  list-style: none;
}

.page-guides-basic .gb-walk__head::-webkit-details-marker {
  display: none;
}

.page-guides-basic .gb-walk__code {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  white-space: nowrap;
}

.page-guides-basic .gb-walk__name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-guides-basic .gb-walk__mark {
  position: relative;
  width: 18px;
  height: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  flex: none;
}

.page-guides-basic .gb-walk__mark::before,
.page-guides-basic .gb-walk__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--color-primary);
  transform: translate(-50%, -50%);
}

.page-guides-basic .gb-walk__mark::before {
  width: 8px;
  height: 1px;
}

.page-guides-basic .gb-walk__mark::after {
  width: 1px;
  height: 8px;
  transition: transform 160ms ease;
}

.page-guides-basic .gb-walk[open] .gb-walk__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-guides-basic .gb-walk__body {
  max-width: var(--measure);
  margin: 0 var(--space-2) var(--space-4) var(--space-2);
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-primary);
}

.page-guides-basic .gb-walk__facts {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-guides-basic .gb-walk__facts li {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-walk__facts .num {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  padding-top: 2px;
}

/* ---------- 04 字段与结果确认 ---------- */
.page-guides-basic .gb-fields__lede {
  max-width: var(--measure);
  margin-top: var(--space-3);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-order {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.page-guides-basic .gb-order__label {
  color: var(--color-primary);
  padding-right: var(--space-2);
  border-right: 1px dotted var(--color-line);
}

.page-guides-basic .gb-order__step {
  color: var(--color-ink);
}

.page-guides-basic .gb-order__sep {
  color: var(--color-ink-muted);
}

.page-guides-basic .gb-fields__figure {
  margin: var(--space-4) 0 var(--space-6);
}

.page-guides-basic .gb-fields__panel {
  padding: var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
}

.page-guides-basic .gb-fields__group + .gb-fields__group {
  margin-top: var(--space-6);
}

.page-guides-basic .gb-fields__group-label {
  margin: 0 0 var(--space-2);
  padding-bottom: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  border-bottom: 1px solid var(--color-contrast-line);
  color: var(--color-contrast-accent);
}

.page-guides-basic .gb-field {
  position: relative;
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2) var(--space-3) var(--space-3);
  border-bottom: 1px dotted var(--color-contrast-line);
  transition: background-color 140ms ease;
}

.page-guides-basic .gb-field::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background-color 140ms ease;
}

.page-guides-basic .gb-field:hover {
  background: color-mix(in srgb, var(--color-contrast-ink) 7%, transparent);
}

.page-guides-basic .gb-field:hover::before {
  background: var(--color-contrast-accent);
}

.page-guides-basic .gb-field__key {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-guides-basic .gb-field__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-guides-basic .gb-field__desc {
  margin-top: 3px;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-guides-basic .gb-field__grain {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
  opacity: 0.9;
}

.page-guides-basic .gb-check {
  margin-top: var(--space-6);
  padding: var(--space-4) 0 var(--space-4) var(--space-3);
  border-left: 2px solid var(--color-primary);
  border-top: 1px dotted var(--color-line);
}

.page-guides-basic .gb-check__title {
  margin-top: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
}

.page-guides-basic .gb-check__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-guides-basic .gb-check__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-check__list .num {
  color: var(--color-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  padding-top: 3px;
}

.page-guides-basic .gb-check__list strong {
  color: var(--color-ink);
  margin-right: 6px;
}

/* ---------- 05 退回路径 ---------- */
.page-guides-basic .gb-recover__grid {
  display: grid;
  gap: var(--space-6);
}

.page-guides-basic .gb-recover__figure {
  margin: 0;
}

.page-guides-basic .gb-recover__steps {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: 1px dotted var(--color-line);
}

.page-guides-basic .gb-recover__steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px dotted var(--color-line);
}

.page-guides-basic .gb-recover__steps .num {
  color: var(--color-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  padding-top: 3px;
}

.page-guides-basic .gb-recover__steps strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-guides-basic .gb-recover__steps p {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-recover__out {
  margin-top: var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 06 接着读 ---------- */
.page-guides-basic .gb-next__list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: 1px dotted var(--color-line);
}

.page-guides-basic .gb-next__list li {
  border-bottom: 1px dotted var(--color-line);
}

.page-guides-basic .gb-next__list a {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2) var(--space-3) var(--space-3);
  position: relative;
  color: var(--color-ink);
  border-bottom: none;
  transition: background-color 140ms ease;
}

.page-guides-basic .gb-next__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background-color 140ms ease;
}

.page-guides-basic .gb-next__list a:hover {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-guides-basic .gb-next__list a:hover::before {
  background: var(--color-primary);
}

.page-guides-basic .gb-next__code {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-guides-basic .gb-next__body {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-guides-basic .gb-next__body strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-guides-basic .gb-next .rule {
  margin-top: var(--space-6);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-guides-basic .gb-fields__panel {
    padding: var(--space-4);
  }

  .page-guides-basic .gb-field {
    grid-template-columns: 5.5rem minmax(0, 1fr) 9rem;
    align-items: start;
    gap: var(--space-3);
  }

  .page-guides-basic .gb-field__key {
    padding-top: 2px;
  }

  .page-guides-basic .gb-field__grain {
    text-align: right;
    padding-top: 2px;
  }

  .page-guides-basic .gb-next__list a {
    grid-template-columns: 9rem minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-3);
  }
}

@media (min-width: 900px) {
  .page-guides-basic .gb-head__inner {
    padding-block: var(--space-6) var(--space-8);
  }

  .page-guides-basic .gb-head__title {
    font-size: var(--text-4xl);
  }

  .page-guides-basic .gb-head__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: end;
    gap: var(--space-8);
  }

  .page-guides-basic .gb-head__meta {
    border-left: 1px dotted var(--color-line);
    padding-left: var(--space-4);
    padding-bottom: var(--space-1);
  }

  .page-guides-basic .gb-entry__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: var(--space-8);
  }

  .page-guides-basic .gb-entry__figure {
    margin-top: var(--space-4);
  }

  .page-guides-basic .gb-recover__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: var(--space-8);
  }

  .page-guides-basic .gb-check {
    padding-left: var(--space-4);
  }
}