.page-reports-method {
  --pm-label-w: calc(var(--space-8) + var(--space-2));
  --pm-rail: 4px;
  --pm-glass: color-mix(in srgb, var(--color-surface) 78%, transparent);
  --pm-glass-line: color-mix(in srgb, var(--color-primary) 22%, transparent);
  display: block;
}

/* ---------- 页首：窄栏导语 + 度量图像 ---------- */

.page-reports-method .method-lead {
  padding-bottom: var(--space-8);
}

.page-reports-method .method-lead .breadcrumb {
  margin-bottom: var(--space-6);
}

.page-reports-method .method-lead__grid {
  align-items: start;
  row-gap: var(--space-6);
}

.page-reports-method .method-lead h1 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 22ch;
}

.page-reports-method .method-lead__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-reports-method .method-lead__note {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-reports-method .method-lead__note strong {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

.page-reports-method .method-index {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-1);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-reports-method .method-index .chip {
  text-decoration: none;
  font-size: var(--text-xs);
}

/* ---------- 媒体面板 ---------- */

.page-reports-method .method-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--pm-glass-line);
  background: var(--color-contrast-surface);
  box-shadow: var(--shadow-2);
}

.page-reports-method .method-media--lead {
  aspect-ratio: 2 / 1;
}

.page-reports-method .method-media--wide {
  aspect-ratio: 16 / 9;
}

.page-reports-method .method-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-reports-method .method-media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.page-reports-method .method-media__body {
  position: absolute;
  inset: auto 0 0 0;
  margin: 0;
  padding: var(--space-3) var(--space-3) var(--space-4);
  max-width: 56ch;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
}

/* ---------- 彩色底与玻璃条目 ---------- */

.page-reports-method .method-body {
  position: relative;
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  background:
    radial-gradient(120% 58% at 10% 0%,
      color-mix(in srgb, var(--color-primary) 14%, transparent) 0%,
      transparent 62%),
    radial-gradient(88% 46% at 92% 18%,
      color-mix(in srgb, var(--color-accent) 12%, transparent) 0%,
      transparent 60%),
    radial-gradient(90% 40% at 40% 100%,
      color-mix(in srgb, var(--color-primary-soft) 70%, transparent) 0%,
      transparent 70%),
    var(--color-surface);
}

.page-reports-method .method-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-reports-method .method-group__num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-reports-method .method-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-reports-method .method-group__note {
  margin-left: auto;
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-reports-method .method-list {
  display: grid;
  gap: var(--space-3);
}

.page-reports-method .method-entry {
  position: relative;
  scroll-margin-top: var(--space-8);
  padding: var(--space-4) var(--space-3) var(--space-4) var(--space-4);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--pm-glass-line);
  background: var(--pm-glass);
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(10px);
}

.page-reports-method .method-entry::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-4);
  bottom: var(--space-4);
  width: 0;
  background: var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: width 280ms ease;
}

.page-reports-method .method-entry.is-inview::before {
  width: var(--pm-rail);
}

.page-reports-method .method-entry__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-reports-method .method-entry__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-primary);
  flex: none;
}

.page-reports-method .method-entry__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-reports-method .method-entry__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: 0;
  padding: 0;
  row-gap: var(--space-1);
}

.page-reports-method .method-term {
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-top: var(--space-2);
}

.page-reports-method .method-desc {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  overflow-wrap: break-word;
}

.page-reports-method .method-misread {
  margin-top: var(--space-3);
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 28%, transparent);
  background: var(--color-highlight);
  overflow: hidden;
}

.page-reports-method .method-misread summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  list-style: none;
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-reports-method .method-misread summary::-webkit-details-marker {
  display: none;
}

.page-reports-method .method-misread summary::after {
  content: "展开";
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-reports-method .method-misread[open] summary::after {
  content: "收起";
}

.page-reports-method .method-misread summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: -2px;
}

.page-reports-method .method-misread p {
  margin: 0;
  padding: 0 var(--space-3) var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-reports-method .method-break {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

/* ---------- 适用条件 ---------- */

.page-reports-method .method-limits__grid {
  align-items: start;
  row-gap: var(--space-6);
}

.page-reports-method .method-limits h2 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  max-width: 16ch;
}

.page-reports-method .method-limits__lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-reports-method .method-limits__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: limits;
}

.page-reports-method .method-limits__list li {
  counter-increment: limits;
  position: relative;
  padding: var(--space-3) 0 var(--space-3) var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-reports-method .method-limits__list li:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-reports-method .method-limits__list li::before {
  content: counter(limits, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-reports-method .method-limits__list strong {
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

/* ---------- 相邻入口 ---------- */

.page-reports-method .method-next__grid {
  align-items: start;
  row-gap: var(--space-6);
}

.page-reports-method .method-next__figure {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--pm-glass-line);
  box-shadow: var(--shadow-1);
}

.page-reports-method .method-next h2 {
  margin: var(--space-2) 0 var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  max-width: 20ch;
}

.page-reports-method .method-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-reports-method .method-next__links li {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-reports-method .method-next__links a {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  text-decoration: none;
  color: var(--color-ink);
  transition: color 200ms ease, transform 200ms ease;
}

.page-reports-method .method-next__links a:hover {
  color: var(--color-primary);
  transform: translateX(var(--space-1));
}

.page-reports-method .method-next__links a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-reports-method .method-next__link-text {
  display: block;
  min-width: 0;
}

.page-reports-method .method-next__link-title {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-reports-method .method-next__link-desc {
  display: block;
  margin-top: var(--space-1);
  max-width: 48ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-reports-method .method-next__arrow {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-accent);
}

/* ---------- 固定返回入口 ---------- */

.page-reports-method .method-float {
  position: fixed;
  right: var(--space-3);
  bottom: calc(var(--space-8) + var(--space-3) + env(safe-area-inset-bottom, 0px));
  z-index: 6;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-contrast-accent) 42%, transparent);
  background: color-mix(in srgb, var(--color-contrast-surface) 88%, transparent);
  color: var(--color-contrast-ink);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-decoration: none;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-2);
  transition: transform 200ms ease;
}

.page-reports-method .method-float:hover {
  transform: translateY(-2px);
}

.page-reports-method .method-float:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: 2px;
}

/* ---------- 中等宽度 ---------- */

@media (min-width: 768px) {
  .page-reports-method .method-entry {
    padding: var(--space-6) var(--space-4) var(--space-6) var(--space-6);
  }

  .page-reports-method .method-entry__grid {
    grid-template-columns: var(--pm-label-w) minmax(0, 1fr);
    column-gap: var(--space-4);
    row-gap: var(--space-3);
  }

  .page-reports-method .method-term {
    margin-top: 0;
    padding-top: 0.2em;
    text-align: left;
  }

  .page-reports-method .method-media--wide {
    aspect-ratio: 21 / 9;
  }
}

/* ---------- 宽屏 ---------- */

@media (min-width: 1024px) {
  .page-reports-method .method-lead {
    padding-top: var(--space-8);
  }

  .page-reports-method .method-body {
    background:
      radial-gradient(120% 58% at 8% 0%,
        color-mix(in srgb, var(--color-primary) 16%, transparent) 0%,
        transparent 60%),
      radial-gradient(80% 46% at 94% 14%,
        color-mix(in srgb, var(--color-accent) 14%, transparent) 0%,
        transparent 58%),
      radial-gradient(80% 40% at 42% 100%,
        color-mix(in srgb, var(--color-primary-soft) 72%, transparent) 0%,
        transparent 72%),
      var(--color-surface);
  }

  .page-reports-method .method-next__grid {
    row-gap: var(--space-8);
  }

  .page-reports-method .method-float {
    right: var(--space-6);
    bottom: var(--space-6);
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-reports-method .method-entry::before {
    transition: none;
  }

  .page-reports-method .method-next__links a {
    transition: none;
  }

  .page-reports-method .method-next__links a:hover {
    transform: none;
  }

  .page-reports-method .method-float {
    transition: none;
  }
}