.page-standards {
  --pn-glass: color-mix(in srgb, var(--color-surface-deep) 62%, transparent);
  --pn-rail: 92px;
}

/* ---------- 首屏 ---------- */
.page-standards .pn-hero {
  position: relative;
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
  border-bottom: var(--border-thin) solid var(--color-line);
  background:
    radial-gradient(110% 80% at 88% -12%, color-mix(in srgb, var(--color-primary) 36%, transparent) 0%, transparent 60%),
    radial-gradient(70% 55% at 4% 4%, color-mix(in srgb, var(--color-accent) 10%, transparent) 0%, transparent 55%);
  overflow: hidden;
}

.page-standards .pn-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-ink) 6%, transparent) 0 1px,
    transparent 1px 6px
  );
  opacity: 0.5;
}

.page-standards .pn-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-standards .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-standards .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
}

.page-standards .breadcrumb a:hover,
.page-standards .breadcrumb a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-standards .pn-hero-grid {
  display: grid;
  gap: var(--space-6);
  align-items: end;
}

.page-standards .pn-hero-copy .display {
  margin: var(--space-3) 0 var(--space-4);
  max-width: 17ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: color-mix(in srgb, var(--color-ink) 78%, var(--color-primary-ink));
}

.page-standards .pn-hero-copy .lede {
  margin: 0;
  max-width: 52ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-standards .pn-hero-figure {
  position: relative;
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-alt);
}

.page-standards .pn-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-standards .pn-hero-figure .figure-cap {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  margin: 0;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
  background: var(--overlay-scrim);
}

.page-standards .pn-stats {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--border-thin);
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-standards .pn-stat {
  min-width: 0;
  padding: var(--space-3) var(--space-3) var(--space-4);
  background: var(--color-surface-alt);
}

.page-standards .pn-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.page-standards .pn-stat:first-child .pn-stat-num {
  color: var(--color-accent);
}

.page-standards .pn-stat-label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-standards .pn-stat-note {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-standards .pn-band {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: var(--space-1) 0 var(--space-4);
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-standards .pn-band-item {
  flex: 0 0 auto;
  min-width: 128px;
  padding: var(--space-2) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--pn-glass);
  backdrop-filter: blur(8px);
  transform: translateY(var(--pn-shift, 0px));
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-standards .pn-band-item:nth-child(2) { --pn-shift: 16px; }
.page-standards .pn-band-item:nth-child(3) { --pn-shift: 32px; }
.page-standards .pn-band-item:nth-child(4) { --pn-shift: 16px; }
.page-standards .pn-band-item:nth-child(5) { --pn-shift: 6px; }

.page-standards .pn-band-item:hover {
  border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
  transform: translateY(calc(var(--pn-shift, 0px) - 4px));
}

.page-standards .pn-band-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-standards .pn-band-name {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  white-space: nowrap;
}

/* ---------- 通用文字 ---------- */
.page-standards .pn-h2 {
  margin: 0 0 var(--space-3);
  max-width: 26ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-xl), 3.2vw, var(--text-2xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: color-mix(in srgb, var(--color-ink) 80%, var(--color-primary-ink));
}

.page-standards .pn-body {
  margin: 0 0 var(--space-3);
  max-width: 68ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-standards .pn-body:last-child {
  margin-bottom: 0;
}

.page-standards .pn-body a,
.page-standards .pn-stage-body a,
.page-standards .pn-step-desc a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.page-standards .pn-body a:hover,
.page-standards .pn-stage-body a:hover,
.page-standards .pn-step-desc a:hover,
.page-standards .pn-body a:focus-visible,
.page-standards .pn-stage-body a:focus-visible,
.page-standards .pn-step-desc a:focus-visible {
  border-bottom-color: var(--color-accent);
}

/* ---------- 筛选 ---------- */
.page-standards .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: var(--space-4) 0 var(--space-6);
}

.page-standards .filter-btn {
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.3;
  color: var(--color-ink-soft);
  background: color-mix(in srgb, var(--color-surface-deep) 55%, transparent);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.page-standards .filter-btn:hover {
  color: var(--color-ink);
  border-color: color-mix(in srgb, var(--color-accent) 50%, transparent);
}

.page-standards .filter-btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-standards .filter-btn[aria-pressed="true"] {
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-color: var(--color-accent);
  font-weight: var(--weight-heading);
}

.page-standards .filter-empty {
  margin: var(--space-4) 0 0;
  padding: var(--space-4);
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-standards .filter-empty[hidden] {
  display: none;
}

/* ---------- 阶段条目 ---------- */
.page-standards .pn-stages {
  display: grid;
}

.page-standards .pn-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3) var(--space-4);
  padding: var(--space-6) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-stage:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-stage[hidden] {
  display: none;
}

.page-standards .pn-stage::before {
  content: "";
  position: absolute;
  top: calc(var(--space-6) * -0.5);
  left: 0;
  width: var(--space-6);
  height: var(--border-thin);
  background: var(--color-accent);
}

.page-standards .pn-stage-rail {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.page-standards .pn-stage-num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-accent);
}

.page-standards .pn-stage-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: color-mix(in srgb, var(--color-ink) 80%, var(--color-primary-ink));
}

.page-standards .pn-stage-desc {
  margin: 0 0 var(--space-3);
  max-width: 64ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-standards .pn-stage-desc:last-child {
  margin-bottom: 0;
}

.page-standards .pn-facts {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2) var(--space-4);
}

.page-standards .pn-facts li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-fact-key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-standards .pn-fact-val {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink);
}

.page-standards .pn-stage-figure {
  position: relative;
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-alt);
}

.page-standards .pn-stage-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-standards .pn-stage-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    transparent 42%,
    color-mix(in srgb, var(--color-primary) 30%, transparent) 100%
  );
}

/* ---------- 标签 ---------- */
.page-standards .tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: calc(var(--space-1) * 0.5) var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  white-space: nowrap;
  color: var(--color-ink-soft);
  background: color-mix(in srgb, var(--color-surface-deep) 50%, transparent);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
}

.page-standards .tag--primary {
  color: var(--color-ink);
  border-color: color-mix(in srgb, var(--color-primary) 55%, transparent);
  background: var(--color-primary-soft);
}

.page-standards .tag--accent {
  color: var(--color-accent-ink);
  border-color: var(--color-accent);
  background: var(--color-accent);
}

.page-standards .pn-tagrow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

/* ---------- 抽签帮助专段 ---------- */
.page-standards .pn-draw {
  display: grid;
  gap: var(--space-6);
}

.page-standards .pn-draw-note {
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-standards .pn-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-step:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-step-num {
  grid-row: span 2;
  padding-top: 0.25em;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-standards .pn-step-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-standards .pn-step-desc {
  margin: 0;
  max-width: 60ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 概率专段 ---------- */
.page-standards .pn-odds {
  display: grid;
  gap: var(--space-6);
}

.page-standards .pn-odds-panel {
  padding: var(--space-4);
}

.page-standards .pn-odds-panel .panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-odds-panel .panel-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-standards .pn-prob {
  margin-top: var(--space-3);
}

.page-standards .pn-prob-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.page-standards .pn-prob-team {
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-standards .pn-prob-value {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink-soft);
  transition: color 0.2s ease;
}

.page-standards .pn-prob:hover .pn-prob-value {
  color: var(--color-accent);
}

.page-standards .bar {
  position: relative;
  height: var(--space-1);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-ink) 12%, transparent);
  overflow: hidden;
}

.page-standards .bar-fill {
  display: block;
  height: 100%;
  width: var(--bar-value, 0%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 0.6s ease;
}

.page-standards .pn-odds-panel .metric-note {
  margin: var(--space-4) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-standards .pn-replay {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-standards .pn-replay-lead {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-standards .pn-odds-more {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
}

/* ---------- 下一步 ---------- */
.page-standards .pn-next-box {
  position: relative;
  overflow: hidden;
  padding: var(--space-6) var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-standards .pn-next-box::after {
  content: "";
  position: absolute;
  top: calc(var(--space-6) * -1);
  right: calc(var(--space-6) * -1);
  width: 240px;
  height: 240px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--color-primary) 32%, transparent) 0%,
    transparent 70%
  );
}

.page-standards .pn-next-box > * {
  position: relative;
  z-index: 1;
}

.page-standards .pn-next-box .eyebrow {
  color: var(--color-contrast-accent);
}

.page-standards .pn-next-title {
  margin: var(--space-2) 0 var(--space-3);
  max-width: 26ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-xl), 3.2vw, var(--text-2xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-standards .pn-next-desc {
  margin: 0;
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, var(--color-contrast-surface));
}

.page-standards .pn-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-standards .pn-next-box .btn--ghost {
  color: var(--color-contrast-ink);
  background: transparent;
  border-color: var(--color-contrast-line);
}

.page-standards .pn-next-box .btn--ghost:hover,
.page-standards .pn-next-box .btn--ghost:focus-visible {
  border-color: var(--color-contrast-ink);
}

.page-standards .pn-next-note {
  margin: var(--space-4) 0 0;
  max-width: 64ch;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-standards .pn-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-standards .pn-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-standards .pn-next-box {
    padding: var(--space-8);
  }
}

@media (min-width: 900px) {
  .page-standards .pn-hero {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
  }

  .page-standards .pn-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6) var(--space-8);
  }

  .page-standards .pn-stage {
    grid-template-columns: var(--pn-rail) minmax(0, 1fr);
  }

  .page-standards .pn-stage--media {
    grid-template-columns: var(--pn-rail) minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
  }

  .page-standards .pn-stage:nth-child(2) {
    padding-left: var(--space-6);
  }

  .page-standards .pn-stage:nth-child(4) {
    padding-left: var(--space-3);
  }

  .page-standards .pn-stage-rail {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-standards .pn-draw {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-standards .pn-draw-head {
    position: sticky;
    top: var(--space-6);
  }

  .page-standards .pn-odds {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-standards .pn-odds-panel {
    padding: var(--space-6);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-standards .pn-band-item,
  .page-standards .filter-btn,
  .page-standards .bar-fill,
  .page-standards .pn-prob-value {
    transition: none;
  }

  .page-standards .pn-band-item,
  .page-standards .pn-band-item:hover {
    transform: none;
  }
}

.page-standards {
  --bar-value: 1rem;
}