.page-guides-advanced {
  padding-block: var(--space-4) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-guides-advanced img {
  max-width: 100%;
  height: auto;
}

@media (min-width: 768px) {
  .page-guides-advanced {
    padding-block: var(--space-6) var(--section-y);
  }
}

/* ---------- 面包屑留白 ---------- */
.page-guides-advanced .breadcrumb {
  margin-bottom: var(--space-6);
}

/* ---------- 首屏 ---------- */
.page-guides-advanced .ga-hero {
  border-left: var(--border-thick) solid var(--color-primary);
  padding-left: var(--space-4);
}

.page-guides-advanced .ga-hero h1 {
  margin: var(--space-3) 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-guides-advanced .ga-lede {
  margin: 0;
  max-width: 58ch;
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

@media (min-width: 768px) {
  .page-guides-advanced .ga-hero {
    padding-left: var(--space-6);
  }

  .page-guides-advanced .ga-hero h1 {
    font-size: var(--text-3xl);
  }
}

/* ---------- 首屏关键数字条 ---------- */
.page-guides-advanced .ga-keyline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--border-thin);
  margin-top: var(--space-6);
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-guides-advanced .ga-keycell {
  padding: var(--space-3);
  background: var(--color-surface-alt);
}

.page-guides-advanced .ga-keycell:nth-child(3) {
  grid-column: 1 / -1;
}

.page-guides-advanced .ga-keycell b {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-accent);
}

.page-guides-advanced .ga-keycell span {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

@media (min-width: 640px) {
  .page-guides-advanced .ga-keyline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-guides-advanced .ga-keycell:nth-child(3) {
    grid-column: auto;
  }
}

/* ---------- 主体两栏：正文 + 右侧刻度栏 ---------- */
.page-guides-advanced .ga-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  margin-top: var(--section-y);
  align-items: start;
}

.page-guides-advanced .ga-main {
  min-width: 0;
}

@media (min-width: 992px) {
  .page-guides-advanced .ga-layout {
    grid-template-columns: minmax(0, 1fr) 252px;
    gap: var(--space-6);
  }

  .page-guides-advanced .ga-rail {
    position: sticky;
    top: var(--space-6);
  }
}

/* ---------- 小节框体 ---------- */
.page-guides-advanced .ga-block {
  margin-top: var(--section-y);
  padding-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-guides-advanced .ga-block:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-guides-advanced .ga-num {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}

.page-guides-advanced .ga-block-title {
  margin: 0 0 var(--space-3);
  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);
  color: var(--color-ink);
}

@media (min-width: 768px) {
  .page-guides-advanced .ga-block-title {
    font-size: var(--text-2xl);
  }
}

.page-guides-advanced .ga-text {
  max-width: var(--measure);
  color: var(--color-ink);
}

.page-guides-advanced .ga-text p {
  margin: 0 0 var(--space-3);
}

.page-guides-advanced .ga-text p:last-child {
  margin-bottom: 0;
}

.page-guides-advanced .ga-inline-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-guides-advanced .ga-inline-link:hover {
  color: var(--color-primary);
}

.page-guides-advanced .ga-inline-link:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 条目列表 ---------- */
.page-guides-advanced .ga-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-guides-advanced .ga-list li {
  padding: var(--space-3) var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-alt) 76%, transparent);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-guides-advanced .ga-list li:hover {
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary-soft) 55%, var(--color-surface-alt));
}

.page-guides-advanced .ga-list--compact li {
  padding: var(--space-3);
}

.page-guides-advanced .ga-item-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-guides-advanced .ga-item-note {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 口径一节的两栏 ---------- */
.page-guides-advanced .ga-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}

@media (min-width: 768px) {
  .page-guides-advanced .ga-split {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: var(--space-6);
    align-items: start;
  }
}

/* ---------- 图片 ---------- */
.page-guides-advanced .ga-figure {
  margin: var(--space-4) 0 0;
}

.page-guides-advanced .ga-figure img {
  display: block;
  width: 100%;
  object-fit: cover;
  border: var(--border-thin) solid var(--color-line);
  border-radius: 0;
  background: var(--color-surface-alt);
}

.page-guides-advanced .ga-figure--square img {
  aspect-ratio: 1 / 1;
}

.page-guides-advanced .ga-figure--wide img {
  aspect-ratio: 7 / 4;
}

.page-guides-advanced .ga-split .ga-figure {
  margin-top: 0;
}

.page-guides-advanced .ga-figcap {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* ---------- 内联 SVG 时间轴 ---------- */
.page-guides-advanced .ga-tlfig {
  margin: var(--space-4) 0 0;
  padding: var(--space-4) var(--space-3) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-alt) 70%, transparent);
}

.page-guides-advanced .ga-tlchart {
  display: block;
  width: 100%;
  height: auto;
}

.page-guides-advanced .ga-tl-axis,
.page-guides-advanced .ga-tl-tickline {
  stroke: var(--color-line);
  stroke-width: 1;
}

.page-guides-advanced .ga-tl-grid {
  stroke: var(--color-line);
  stroke-width: 1;
  stroke-dasharray: 3 6;
  opacity: 0.7;
}

.page-guides-advanced .ga-tl-curve {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 2.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-guides-advanced .ga-tl-stem {
  stroke: var(--color-primary);
  stroke-width: 1;
  stroke-dasharray: 2 4;
  opacity: 0.85;
}

.page-guides-advanced .ga-tl-dot {
  fill: var(--color-primary);
  stroke: var(--color-surface);
  stroke-width: 1.5;
}

.page-guides-advanced .ga-tl-tick {
  fill: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 13px;
  text-anchor: middle;
}

.page-guides-advanced .ga-tl-nodelabel {
  fill: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  text-anchor: middle;
}

.page-guides-advanced .ga-tlfig .ga-figcap {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

/* ---------- 三种交叉读法 ---------- */
.page-guides-advanced .ga-cases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-4);
}

@media (min-width: 720px) {
  .page-guides-advanced .ga-cases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-guides-advanced .ga-case:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-guides-advanced .ga-cases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-guides-advanced .ga-case:first-child {
    grid-column: auto;
  }
}

.page-guides-advanced .ga-case {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-surface-alt) 82%, transparent);
  transition: border-color 0.18s ease;
}

.page-guides-advanced .ga-case:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-1);
}

.page-guides-advanced .ga-case-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-guides-advanced .ga-case h3 {
  margin: 0;
}

.page-guides-advanced .ga-case-body {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-guides-advanced .ga-case-caveat {
  margin: auto 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--color-ink-muted);
}

/* ---------- 反色面板：容易读错的几处 ---------- */
.page-guides-advanced .ga-panel-contrast {
  padding: var(--space-6) var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--color-contrast-ink);
}

.page-guides-advanced .ga-panel-contrast .ga-num {
  color: var(--color-contrast-accent);
}

.page-guides-advanced .ga-panel-contrast .ga-block-title {
  color: var(--color-contrast-ink);
}

.page-guides-advanced .ga-contrast-lede {
  margin: 0;
  max-width: 56ch;
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
}

.page-guides-advanced .ga-pitlist {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  counter-reset: ga-pit;
}

.page-guides-advanced .ga-pitlist li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-line) 26%, transparent);
}

@media (min-width: 700px) {
  .page-guides-advanced .ga-pitlist li {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: var(--space-4);
    align-items: baseline;
  }
}

.page-guides-advanced .ga-pit-wrong {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.45;
  color: var(--color-contrast-ink);
}

.page-guides-advanced .ga-pit-wrong::before {
  content: "×";
  margin-right: var(--space-1);
  font-family: var(--font-mono);
  color: #b23a1d;
}

.page-guides-advanced .ga-pit-right {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-guides-advanced .ga-pit-right::before {
  content: "√";
  margin-right: var(--space-1);
  font-family: var(--font-mono);
  color: var(--color-contrast-accent);
}

@media (min-width: 768px) {
  .page-guides-advanced .ga-panel-contrast {
    padding: var(--space-8) var(--space-6);
  }
}

/* ---------- 出口 ---------- */
.page-guides-advanced .ga-exits {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* ---------- 右侧刻度栏 ---------- */
.page-guides-advanced .ga-rail-label {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-guides-advanced .ga-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-guides-advanced .ga-rail-link {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  border-left: var(--border-thin) solid var(--color-line);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-guides-advanced .ga-rail-link::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -4px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.page-guides-advanced .ga-rail-link:hover,
.page-guides-advanced .ga-rail-link:focus-visible {
  border-left-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary-soft) 50%, transparent);
}

.page-guides-advanced .ga-rail-link:hover::before,
.page-guides-advanced .ga-rail-link:focus-visible::before {
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-1);
}

.page-guides-advanced .ga-rail-link:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-guides-advanced .ga-rail-t {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-guides-advanced .ga-rail-n {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-soft);
}

@media (max-width: 991px) {
  .page-guides-advanced .ga-rail {
    padding: var(--space-4);
    border: var(--border-thin) solid var(--color-line);
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--color-surface-alt) 70%, transparent);
  }
}