/* 爱游戏会馆 — 共享样式 /assets/site.css — 双色海报：紫 #6322dd 与橄榄 #737915 两墨，其余为纸面与反相底 */
:root {
  --color-surface: #ffffff;
  --color-surface-alt: #f5f5f5;
  --color-surface-deep: #e7e7e8;
  --color-ink: #37333d;
  --color-ink-soft: #666071;
  --color-ink-muted: #7d7788;
  --color-line: #dbdadc;
  --color-primary: #6322dd;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #e9e0fa;
  --color-accent: #737915;
  --color-accent-ink: #ffffff;
  --color-highlight: #e6e7d5;
  --color-focus: #71770d;
  --color-contrast-surface: #120e1b;
  --color-contrast-ink: #e5e4e7;
  --color-contrast-line: #403d48;
  --color-contrast-accent: #cdd926;
  --overlay-scrim: linear-gradient(180deg, rgba(18, 14, 27, 0.35) 0%, rgba(18, 14, 27, 0.72) 55%, rgba(18, 14, 27, 0.92) 100%);
  --font-heading: "Source Han Sans SC", "Noto Sans SC", SimHei, "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 11.0px;
  --text-sm: 14.7px;
  --text-base: 17px;
  --text-lg: 22.7px;
  --text-xl: 30.2px;
  --text-2xl: 40.3px;
  --text-3xl: 53.7px;
  --text-4xl: 71.5px;
  --text-display: clamp(57px, 11.6vw, 149px);
  --text-figure: clamp(47px, 8.4vw, 107px);
  --weight-heading: 741;
  --weight-body: 400;
  --leading-body: 1.7;
  --leading-heading: 1.24;
  --tracking-heading: -0.014em;
  --radius-sm: 1px;
  --radius-md: 1px;
  --radius-lg: 1px;
  --radius-pill: 1px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1120px;
  --measure: 66ch;
  --gutter: 32px;
  --section-y: 99px;
  --section-y-lg: 139px;
}

/* ============ reset ============ */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 84px;
}
body {
  margin: 0;
  padding-top: 64px;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: inherit;
}
h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-base); }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-primary); text-decoration: none; transition: background-color 120ms linear, color 120ms linear; }
a:hover { color: var(--color-focus); }
strong, b { font-weight: var(--weight-heading); }
img, svg, video { max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
dl, dd, figure, blockquote { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; }
table { border-collapse: collapse; }
::selection { background-color: var(--color-primary); color: var(--color-primary-ink); }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
#main-content { display: block; scroll-margin-top: 84px; }
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* ============ 跳转链接 ============ */
.skip-link {
  position: fixed; top: 0; left: 0; z-index: 300;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-accent);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  transform: translateY(-130%);
  transition: transform 120ms linear;
}
.skip-link:focus { transform: translateY(0); color: var(--color-contrast-accent); }

/* ============ 头部：左侧纵向轨道 ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  z-index: 200;
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  height: 100%;
  padding: 0 var(--space-3);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary-ink);
  text-decoration: none;
}
.brand:hover { color: var(--color-primary-ink); }
.brand__mark {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  flex: 0 0 auto;
  background-color: var(--color-primary-ink);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1;
  border-radius: var(--radius-sm);
}
.brand__text { display: block; }
.brand__name {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.14;
  letter-spacing: var(--tracking-heading);
}
.brand__tag {
  display: block;
  margin-top: 2px;
  font-size: var(--text-xs);
  letter-spacing: .06em;
  color: color-mix(in srgb, var(--color-primary-ink) 74%, var(--color-primary));
}
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 8px 10px;
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color 120ms linear, color 120ms linear;
}
.nav-toggle:hover { background-color: var(--color-primary-ink); color: var(--color-primary); }
.nav-toggle__bars { display: block; width: 20px; }
.nav-toggle__bars span { display: block; height: 2px; margin: 4px 0; background-color: currentColor; }
.nav-toggle__text { display: none; }
@media (min-width: 420px) { .nav-toggle__text { display: inline; } }

.site-nav {
  position: fixed;
  top: 64px; right: 0; bottom: 0;
  z-index: 2;
  width: min(340px, 88vw);
  padding: var(--space-4) var(--space-3) var(--space-8);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  overflow-y: auto;
  transform: translateX(102%);
  transition: transform 200ms ease-out;
}
.site-header[data-open] .site-nav { transform: translateX(0); }
.site-nav__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: .2em;
  color: var(--color-contrast-accent);
}
.nav-list { display: block; }
.nav-list__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 11px var(--space-2);
  color: inherit;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 120ms linear, color 120ms linear;
}
.nav-list__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: .08em;
  color: var(--color-contrast-accent);
}
.nav-list__link:hover { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
.nav-list__link:hover .nav-list__num { color: var(--color-contrast-surface); }
.nav-list__link[aria-current="page"] { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
.nav-list__link[aria-current="page"] .nav-list__num { color: var(--color-contrast-surface); }

.rail-legend { margin-top: var(--space-6); }
.rail-legend__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: .2em;
  color: var(--color-contrast-accent);
}
.rail-legend__list { display: grid; gap: 6px; margin-bottom: var(--space-3); }
.rail-legend__item { display: flex; align-items: center; gap: var(--space-1); font-size: var(--text-sm); }
.rail-legend__chip { display: inline-block; width: 14px; height: 14px; flex: 0 0 auto; }
.rail-legend__chip--sport { background-color: var(--color-primary-ink); }
.rail-legend__chip--cup { background-color: var(--color-contrast-accent); }
.rail-legend__chip--friendly { background-color: var(--color-primary-soft); }
.rail-legend__cta {
  display: inline-block;
  padding: 8px var(--space-2);
  background-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 120ms linear, color 120ms linear;
}
.rail-legend__cta:hover { background-color: var(--color-primary-ink); color: var(--color-primary); }

.nav-scrim {
  position: fixed;
  inset: 64px 0 0 0;
  z-index: 1;
  background-color: var(--color-contrast-surface);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms linear;
}
.site-header[data-open] .nav-scrim { opacity: .86; pointer-events: auto; }

@media (min-width: 1024px) {
  body { padding-top: 0; padding-left: 264px; }
  .site-header { right: auto; bottom: 0; width: 264px; height: auto; }
  .site-header__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: var(--space-6);
    height: 100%;
    padding: var(--space-6) var(--space-4) var(--space-4);
    overflow-y: auto;
  }
  .nav-toggle { display: none; }
  .nav-scrim { display: none; }
  .site-nav {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    background-color: transparent;
    color: inherit;
    overflow: visible;
    transform: none;
    transition: none;
  }
  .site-header[data-open] .site-nav { transform: none; }
  .site-nav__title { color: color-mix(in srgb, var(--color-primary-ink) 66%, var(--color-primary)); }
  .nav-list__link { padding: 12px var(--space-2); }
  .nav-list__num { color: color-mix(in srgb, var(--color-primary-ink) 70%, var(--color-primary)); }
  .nav-list__link:hover { background-color: var(--color-primary-ink); color: var(--color-primary); }
  .nav-list__link:hover .nav-list__num { color: var(--color-primary); }
  .nav-list__link[aria-current="page"] { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
  .nav-list__link[aria-current="page"] .nav-list__num { color: var(--color-contrast-surface); }
  .rail-legend { margin-top: auto; }
  .rail-legend__title { color: color-mix(in srgb, var(--color-primary-ink) 66%, var(--color-primary)); }
  .rail-legend__chip--friendly { background-color: color-mix(in srgb, var(--color-primary-ink) 52%, var(--color-primary)); }
  .rail-legend__cta { background-color: var(--color-primary-ink); color: var(--color-primary); }
  .rail-legend__cta:hover { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
}

/* ============ 页脚：反色区 ============ */
.site-footer {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y) 0 var(--space-6);
}
.site-footer__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
.site-footer__brand { margin-bottom: var(--space-6); }
.site-footer__name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: 1.1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}
.site-footer__tag {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}
.site-footer__grid { display: grid; gap: var(--space-4); }
.site-footer__col { min-width: 0; }
.site-footer__label {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: .2em;
  color: var(--color-contrast-accent);
}
.footer-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px var(--space-2); }
.footer-nav a,
.footer-legal a {
  display: block;
  padding: 7px var(--space-1);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 120ms linear, color 120ms linear;
}
.footer-nav a:hover,
.footer-legal a:hover { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
.footer-contact li {
  padding: 7px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-contrast-ink);
}
.footer-contact li:last-child { font-family: var(--font-body); color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent); }
.site-footer__note {
  max-width: var(--measure);
  margin: var(--space-6) 0 var(--space-3);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}
.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: .06em;
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}
.site-footer__meta-item { display: inline-block; }
@media (min-width: 720px) {
  .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr 1.4fr; align-items: start; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ============ 容器与网格 ============ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}
.container--wide { max-width: calc(var(--container) + 240px); }
.grid-7 { display: grid; gap: var(--gutter); grid-template-columns: minmax(0, 1fr); }
.grid-split { display: grid; gap: var(--gutter); grid-template-columns: minmax(0, 1fr); }
.col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7 { grid-column: 1 / -1; }
@media (min-width: 720px) {
  .grid-7 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7 { grid-column: 1 / -1; }
  .col-1, .col-2 { grid-column: span 1; }
}
@media (min-width: 1024px) {
  .grid-7 { grid-template-columns: repeat(7, minmax(0, 1fr)); }
  .grid-split { grid-template-columns: minmax(0, 5fr) minmax(0, 2fr); align-items: start; }
  .col-1 { grid-column: span 1; }
  .col-2 { grid-column: span 2; }
  .col-3 { grid-column: span 3; }
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
}

/* ============ 分区与色块反转 ============ */
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--tight { padding-block: var(--section-y); padding-block-start: var(--space-6); }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }
.section--primary { background-color: var(--color-primary); color: var(--color-primary-ink); }
.section--dark { background-color: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.section--primary a { color: var(--color-primary-ink); }
.section--primary a:hover { color: var(--color-contrast-accent); }
.section--dark a { color: var(--color-contrast-accent); }
.section--dark a:hover { color: var(--color-primary-ink); }
.section--alt .section-title,
.section--deep .section-title { color: var(--color-ink); }

/* ============ 标题与文本 ============ */
.section-head { display: grid; gap: var(--space-2); margin-bottom: var(--space-6); }
.eyebrow {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: .22em;
  color: var(--color-accent);
}
.section--primary .eyebrow,
.section--dark .eyebrow { color: var(--color-contrast-accent); }
.section-title { margin: 0; font-size: var(--text-2xl); }
.section-index {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-figure);
  line-height: .78;
  letter-spacing: -.04em;
  color: color-mix(in srgb, var(--color-primary) 24%, var(--color-surface));
}
.section--primary .section-index,
.section--dark .section-index { color: color-mix(in srgb, var(--color-primary-ink) 26%, transparent); }
.lead { max-width: var(--measure); font-size: var(--text-lg); line-height: 1.5; color: var(--color-ink-soft); }
.section--primary .lead,
.section--dark .lead { color: color-mix(in srgb, currentColor 78%, transparent); }
.meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: .1em;
  color: var(--color-ink-muted);
}
.section--primary .meta,
.section--dark .meta { color: color-mix(in srgb, currentColor 62%, transparent); }
.note { max-width: var(--measure); font-size: var(--text-sm); color: var(--color-ink-soft); }
.prose { max-width: var(--measure); }
.prose h2, .prose h3 { margin-top: var(--space-6); }
.prose ul { margin-bottom: var(--space-3); padding-left: 1.15em; list-style: square; }
.prose li { margin-bottom: var(--space-1); }
.section--primary .prose,
.section--dark .prose { max-width: var(--measure); }
@media (min-width: 1024px) {
  .section-title { font-size: var(--text-3xl); }
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 14px var(--space-3);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1;
  text-decoration: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 120ms linear, color 120ms linear;
}
.btn:hover { background-color: var(--color-contrast-surface); color: var(--color-contrast-accent); }
.btn--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--accent:hover { background-color: var(--color-contrast-surface); color: var(--color-contrast-accent); }
.btn--invert { background-color: var(--color-primary-ink); color: var(--color-primary); }
.btn--invert:hover { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
.btn--quiet { background-color: var(--color-surface-deep); color: var(--color-ink); }
.btn--quiet:hover { background-color: var(--color-primary); color: var(--color-primary-ink); }

/* ============ 标签与筛选 ============ */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  background-color: var(--color-surface-deep);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  line-height: 1.2;
  border-radius: var(--radius-pill);
  transition: background-color 120ms linear, color 120ms linear;
}
.chip--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.chip--alert { background-color: var(--color-primary); color: var(--color-primary-ink); }
.chip--muted { background-color: var(--color-surface-alt); color: var(--color-ink-soft); }
.chip--press { cursor: pointer; }
.chip--press:hover { background-color: var(--color-primary); color: var(--color-primary-ink); }
.chip[aria-pressed="true"],
.chip--current { background-color: var(--color-focus); color: var(--color-accent-ink); }
.section--primary .chip,
.section--dark .chip { background-color: color-mix(in srgb, var(--color-primary-ink) 14%, transparent); color: inherit; }
.section--primary .chip[aria-pressed="true"],
.section--dark .chip[aria-pressed="true"] { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-bottom: var(--space-4); }
.filter-status { font-size: var(--text-xs); letter-spacing: .1em; color: var(--color-ink-muted); }
.filter-item.is-hidden { display: none; }

/* ============ 数据对照 ============ */
.data-table { width: 100%; background-color: var(--color-surface-alt); font-size: var(--text-sm); }
.data-table caption {
  padding: 0 0 var(--space-2);
  text-align: left;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.data-table th, .data-table td { padding: 12px var(--space-2); text-align: left; vertical-align: top; }
.data-table thead th {
  background-color: var(--color-surface-deep);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: .12em;
  color: var(--color-ink-soft);
}
.data-table tbody tr:nth-child(even) { background-color: color-mix(in srgb, var(--color-surface-deep) 52%, var(--color-surface-alt)); }
.data-table .is-num { font-family: var(--font-mono); font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-4xl);
  line-height: .92;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}
.stat__value--xl { font-size: var(--text-figure); }
.stat__unit { margin-left: .25em; font-size: var(--text-lg); font-weight: 400; }
.stat__label { font-size: var(--text-xs); letter-spacing: .14em; color: var(--color-ink-muted); }
.section--primary .stat__label,
.section--dark .stat__label { color: color-mix(in srgb, currentColor 66%, transparent); }

.callout { padding: var(--space-3) var(--space-4); background-color: var(--color-highlight); color: var(--color-ink); }
.callout__label {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: .18em;
  color: var(--color-accent);
}
.callout--ink { background-color: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.callout--ink .callout__label { color: var(--color-contrast-accent); }

.panel { padding: var(--space-4); background-color: var(--color-surface-alt); }
.panel--deep { background-color: var(--color-surface-deep); }
.panel--ink { background-color: var(--color-contrast-surface); color: var(--color-contrast-ink); }
.panel__title { margin: 0 0 var(--space-2); font-size: var(--text-xl); }

/* ============ 图像容器 ============ */
.media-frame {
  position: relative;
  display: block;
  padding: var(--border-thin);
  background-color: var(--color-contrast-surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.media-frame__inner {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--color-surface-deep);
  aspect-ratio: 16 / 10;
}
.media-frame__inner > img,
.media-frame__inner > svg { display: block; width: 100%; height: 100%; object-fit: cover; }
.media-frame--square .media-frame__inner { aspect-ratio: 1 / 1; }
.media-frame--tall .media-frame__inner { aspect-ratio: 3 / 4; }
.media-frame--wide .media-frame__inner { aspect-ratio: 21 / 9; }
.media-frame__scrim { position: absolute; inset: 0; background-image: var(--overlay-scrim); }
.media-frame__body { position: absolute; inset: auto 0 0 0; padding: var(--space-3); color: var(--color-primary-ink); }
.media-frame__body h3,
.media-frame__body p { margin: 0 0 4px; }
.media-frame__caption { margin-top: var(--space-1); font-size: var(--text-xs); color: var(--color-ink-muted); }
.section--dark .media-frame__caption { color: color-mix(in srgb, var(--color-contrast-ink) 60%, transparent); }

/* ============ 吸顶进程条与动线 ============ */
.process-bar {
  position: sticky;
  top: 64px;
  z-index: 40;
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.process-bar__node {
  flex: 0 0 auto;
  padding: 13px var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
  text-decoration: none;
  transition: background-color 120ms linear, color 120ms linear;
}
.process-bar__node:hover { background-color: var(--color-primary); color: var(--color-primary-ink); }
.process-bar__node[aria-current="step"],
.process-bar__node.is-current { background-color: var(--color-contrast-accent); color: var(--color-contrast-surface); }
@media (min-width: 1024px) { .process-bar { top: 0; } }

.route { display: grid; gap: var(--space-4); }
.route__step { position: relative; padding-left: var(--space-4); }
.route__step::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 12px; height: 12px;
  background-color: var(--color-accent);
}
.route__step.is-current::before { background-color: var(--color-primary); }
.section--dark .route__step::before { background-color: var(--color-contrast-accent); }

/* ============ 面包屑 ============ */
.breadcrumb { margin-bottom: var(--space-4); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1); font-size: var(--text-xs); letter-spacing: .06em; }
.breadcrumb li { display: flex; align-items: center; gap: var(--space-1); }
.breadcrumb li + li::before { content: "/"; color: var(--color-ink-muted); }
.breadcrumb a { padding: 2px 5px; color: var(--color-ink-soft); text-decoration: none; border-radius: var(--radius-sm); }
.breadcrumb a:hover { background-color: var(--color-primary); color: var(--color-primary-ink); }
.breadcrumb [aria-current="page"] { color: var(--color-ink); }

/* ============ 滚动进度条（脚本生成） ============ */
.scroll-progress {
  position: fixed;
  top: 64px; left: 0; right: 0;
  height: 3px;
  z-index: 250;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}
@media (min-width: 1024px) { .scroll-progress { top: 0; left: 264px; } }

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  html { scroll-behavior: auto; }
}