:root {
  --color-surface: #fdfdfd;
  --color-surface-alt: #f3f3f3;
  --color-surface-deep: #e5e5e5;
  --color-ink: #393233;
  --color-ink-soft: #685e60;
  --color-ink-muted: #857a7c;
  --color-line: #dad8d9;
  --color-primary: #eb0a28;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #fadbdf;
  --color-accent: #ec0e2c;
  --color-accent-ink: #ffffff;
  --color-highlight: #fad2d7;
  --color-focus: #e40220;
  --color-contrast-surface: #230f12;
  --color-contrast-ink: #e7e4e5;
  --color-contrast-line: #4e3e40;
  --color-contrast-accent: #f22b46;
  --overlay-scrim: linear-gradient(180deg, rgba(35, 15, 18, 0.35) 0%, rgba(35, 15, 18, 0.72) 55%, rgba(35, 15, 18, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 11.4px;
  --text-sm: 14.3px;
  --text-base: 16px;
  --text-lg: 20.0px;
  --text-xl: 25.0px;
  --text-2xl: 31.2px;
  --text-3xl: 39.1px;
  --text-4xl: 48.8px;
  --text-display: clamp(55px, 11.2vw, 144px);
  --text-figure: clamp(46px, 8.1vw, 104px);
  --weight-heading: 842;
  --weight-body: 400;
  --leading-body: 1.73;
  --leading-heading: 1.26;
  --tracking-heading: -0.012em;
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;
  --radius-pill: 0px;
  --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: 1180px;
  --measure: 70ch;
  --gutter: 32px;
  --section-y: 114px;
  --section-y-lg: 160px;
}

/* 派生布局变量（由定稿变量计算，不覆盖任何定稿取值） */
:root {
  --rail-w: 216px;
  --header-h: 64px;
}

/* ---------------- reset ---------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--space-4));
}

body {
  margin: 0;
  padding-top: var(--header-h);
  background: 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);
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

p { margin: 0 0 var(--space-3); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

img, svg, video { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; border-radius: 0; }

button { background: none; border: 0; cursor: pointer; }

table { width: 100%; border-collapse: collapse; }

hr { border: 0; }

::selection { background: var(--color-primary); color: var(--color-primary-ink); }

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

[hidden] { display: none !important; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  padding: 12px 20px;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-size: var(--text-sm);
  font-weight: 500;
  transform: translateY(-140%);
  transition: transform 160ms linear;
}

.skip-link:focus { transform: translateY(0); }

/* ---------------- 排版与版面工具 ---------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.measure { max-width: var(--measure); }

.display {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 0.94;
  letter-spacing: -0.035em;
  color: var(--color-ink);
}

.figure {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.9;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.lead {
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.rule {
  height: 0;
  margin: 0;
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.section {
  padding-block: var(--section-y);
  border-top: var(--border-thin) solid var(--color-line);
}

.section-lg { padding-block: var(--section-y-lg); }
.section:first-of-type { border-top: 0; }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.section-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.section-title {
  margin: 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);
  transition: color 240ms linear;
}

.grid { display: grid; gap: var(--gutter); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-12 {
  grid-column: 1 / -1;
  min-width: 0;
}

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 11px 18px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-align: center;
  transition: background-color 160ms linear, color 160ms linear, border-color 160ms linear;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.btn-primary:hover {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.btn-ghost {
  border-color: var(--color-line);
  color: var(--color-ink);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.panel-dark .btn-ghost {
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

.panel-dark .btn-ghost:hover {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

/* ---------------- 面包屑 ---------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.breadcrumb li { display: inline-flex; align-items: center; gap: var(--space-1); }
.breadcrumb li + li::before { content: "/"; color: var(--color-line); }
.breadcrumb a { color: var(--color-ink-soft); }
.breadcrumb a:hover { color: var(--color-primary); box-shadow: inset 0 -2px 0 var(--color-primary); }

/* ---------------- 强调机制 ---------------- */
.hl {
  background: var(--color-highlight);
  padding: 0 0.16em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.ul-accent { border-bottom: 2px solid var(--color-primary); padding-bottom: 1px; }

.chip {
  display: inline-block;
  padding: 4px 8px;
  background: var(--color-primary-soft);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
}

.chip-accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

/* ---------------- 深色面板 ---------------- */
.panel-dark {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y);
}

.panel-dark .section-title,
.panel-dark h1,
.panel-dark h2,
.panel-dark h3,
.panel-dark h4 { color: var(--color-contrast-ink); }

.panel-dark .lead,
.panel-dark .meta { color: color-mix(in srgb, var(--color-contrast-ink) 72%, var(--color-contrast-surface)); }

.panel-dark .rule { border-top-color: var(--color-contrast-line); }

.panel-dark .figure { color: var(--color-contrast-accent); }

.panel-dark .section-index { color: var(--color-contrast-accent); }

.panel-dark :focus-visible { outline-color: var(--color-contrast-accent); }

/* ---------------- 图片容器 ---------------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-surface-deep);
  border-radius: var(--radius-sm);
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-1x1 { aspect-ratio: 1 / 1; }

.media-overlay {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.media-label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 6px 10px;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

/* ---------------- 动效 ---------------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 200ms linear, transform 200ms linear;
}

.has-js [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: translateY(0);
}

.has-js [data-section][data-active="true"] .section-title { color: var(--color-primary); }
.has-js .panel-dark[data-section][data-active="true"] .section-title { color: var(--color-contrast-accent); }

@keyframes pulse-accent {
  0% { color: var(--color-accent); }
  50% { color: var(--color-ink); }
  100% { color: var(--color-accent); }
}

.is-pulse { animation: pulse-accent 420ms steps(1, end) 2; }

/* ---------------- HEADER ---------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  display: flex;
  align-items: stretch;
  height: var(--header-h);
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 200;
  pointer-events: none;
}

.read-progress-bar {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

.brand-block {
  position: relative;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  padding: 0 var(--space-2);
  background: var(--color-contrast-surface);
}

.brand-block::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background: var(--color-primary);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand-mark {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  line-height: 1;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface));
}

.header-utility {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: 0 var(--space-2);
}

.cutoff-tag {
  margin: 0;
  padding: 6px 10px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.site-search { position: relative; display: block; }

.site-search-input {
  width: 200px;
  padding: 9px 10px;
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.site-search-input::placeholder { color: var(--color-ink-muted); }

.site-search-input:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 0;
}

.header-cta { flex: 0 0 auto; white-space: nowrap; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 11px 12px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
}

.nav-toggle-marks {
  display: grid;
  gap: 3px;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-contrast-accent);
  transition: transform 160ms linear, opacity 160ms linear;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.site-nav {
  --rail-ink: var(--color-contrast-ink);
  --rail-ink-sub: color-mix(in srgb, var(--color-contrast-ink) 58%, var(--color-contrast-surface));
  --rail-line: var(--color-contrast-line);
  --rail-hover: color-mix(in srgb, var(--color-contrast-ink) 12%, var(--color-contrast-surface));
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding-bottom: var(--space-6);
  background: var(--color-contrast-surface);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 200ms linear, transform 200ms linear, visibility 0s linear 200ms;
}

.site-nav[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 200ms linear, transform 200ms linear;
}

.rail-list { flex: 0 0 auto; }

.rail-link {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: baseline;
  gap: var(--space-1);
  padding: 18px var(--space-3);
  border-bottom: var(--border-thin) solid var(--rail-line);
  color: var(--rail-ink);
  transition: background-color 160ms linear, color 160ms linear;
}

.rail-link:hover { background: var(--rail-hover); }

.rail-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--rail-ink-sub);
  transition: color 160ms linear;
}

.rail-label {
  position: relative;
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: var(--tracking-heading);
  line-height: 1.2;
  color: var(--rail-ink);
}

.rail-link:hover .rail-label::after,
.rail-link:focus-visible .rail-label::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--color-primary);
}

.rail-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-primary);
}

.rail-link[aria-current="page"] .rail-index { color: var(--color-accent); }
.rail-link[aria-current="page"] .rail-label { font-weight: 700; }

.rail-note {
  margin: auto var(--space-3) 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--rail-line);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--rail-ink-sub);
}

@media (min-width: 640px) {
  .header-utility { padding: 0 var(--space-3); gap: var(--space-3); }
}

@media (max-width: 900px) {
  .site-search { display: none; }
}

@media (max-width: 560px) {
  .cutoff-tag { display: none; }
  .header-cta { padding: 10px 10px; font-size: var(--text-xs); }
  .brand-mark { font-size: var(--text-base); }
  .brand-sub { display: none; }
}

@media (min-width: 1024px) {
  main,
  #main-content { padding-left: var(--rail-w); padding-right: 0; }

  .site-footer { padding-left: var(--rail-w); }

  .brand-block { width: var(--rail-w); padding: 0 var(--space-3); }

  .nav-toggle { display: none; }

  .header-utility { padding: 0 var(--space-4); gap: var(--space-4); }

  .site-nav {
    --rail-ink: var(--color-ink);
    --rail-ink-sub: var(--color-ink-muted);
    --rail-line: var(--color-line);
    --rail-hover: var(--color-surface-alt);
    top: var(--header-h);
    right: auto;
    bottom: 0;
    width: var(--rail-w);
    border-top: 0;
    border-right: var(--border-thin) solid var(--color-line);
    background: var(--color-surface);
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
    z-index: 70;
  }

  .site-nav[data-open="true"] { opacity: 1; visibility: visible; transform: none; }

  .rail-link { padding: 15px var(--space-3); }
}

@media (min-width: 720px) {
  .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; }
  .col-8 { grid-column: span 8; }
  .col-9 { grid-column: span 9; }
  .col-12 { grid-column: span 12; }
}

@media (min-width: 900px) {
  .section-head {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: var(--gutter);
    align-items: baseline;
  }
}

/* ---------------- FOOTER ---------------- */
.site-footer {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.footer-step {
  border-top: var(--border-thin) solid var(--color-contrast-line);
  padding-block: var(--space-6);
}

.footer-step:first-child { border-top: 0; }

.footer-inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.footer-brand { margin-bottom: var(--space-6); }

.footer-brand-mark {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.footer-brand-sub {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, var(--color-contrast-surface));
}

.footer-cutoff {
  margin: var(--space-2) 0 0;
  display: inline-block;
  padding: 5px 9px;
  border: var(--border-thin) solid var(--color-contrast-accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}

.footer-index {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--gutter);
}

.footer-col { min-width: 0; }

.footer-link {
  display: inline-block;
  padding: 6px 0;
  font-size: var(--text-sm);
  line-height: 1.3;
  color: var(--color-contrast-ink);
  transition: color 160ms linear;
}

.footer-link:hover { color: var(--color-contrast-accent); }

.footer-meta-item + .footer-meta-item { margin-top: var(--space-6); }

.footer-meta-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.footer-meta-text {
  margin: 0 0 var(--space-2);
  max-width: 62ch;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
}

.footer-contact {
  display: grid;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.footer-contact li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
}

.footer-contact-key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, var(--color-contrast-surface));
}

.footer-contact-val {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  word-break: break-word;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.footer-legal-note,
.footer-short,
.footer-year {
  margin: 0 0 var(--space-1);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, var(--color-contrast-surface));
}

.footer-legal-note { font-family: var(--font-mono); letter-spacing: 0.04em; }

.site-footer :focus-visible { outline-color: var(--color-contrast-accent); }

@media (min-width: 720px) {
  .footer-index { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-step-meta .footer-inner {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-8);
  }
  .footer-meta-item + .footer-meta-item { margin-top: 0; }
}

@media (min-width: 1024px) {
  .footer-step-index .footer-inner {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .footer-brand { margin-bottom: 0; }

  .footer-step-meta .footer-inner {
    padding-left: calc(var(--gutter) + var(--space-6));
  }

  .footer-step-legal .footer-inner {
    padding-left: calc(var(--gutter) + var(--space-8));
  }
}

/* ---------------- 无障碍与动效降级 ---------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .has-js [data-reveal],
  .has-js [data-reveal][data-revealed="true"] {
    opacity: 1 !important;
    transform: none !important;
  }

  .site-nav { transition: none !important; }
}