:root {
  --color-surface: #fefefe;
  --color-surface-alt: #f4f4f4;
  --color-surface-deep: #e5e6e5;
  --color-ink: #2e3830;
  --color-ink-soft: #576659;
  --color-ink-muted: #6f8072;
  --color-line: #d9dad9;
  --color-primary: #188629;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #deede0;
  --color-accent: #b716e9;
  --color-accent-ink: #ffffff;
  --color-highlight: #f1d4fa;
  --color-focus: #ba09f1;
  --color-contrast-surface: #0f1d11;
  --color-contrast-ink: #e4e7e5;
  --color-contrast-line: #3e4940;
  --color-contrast-accent: #c645ed;
  --overlay-scrim: linear-gradient(180deg, rgba(15, 29, 17, 0.35) 0%, rgba(15, 29, 17, 0.72) 55%, rgba(15, 29, 17, 0.92) 100%);
  --font-heading: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 10.4px;
  --text-sm: 13.9px;
  --text-base: 16px;
  --text-lg: 21.3px;
  --text-xl: 28.4px;
  --text-2xl: 37.9px;
  --text-3xl: 50.5px;
  --text-4xl: 67.3px;
  --text-display: clamp(45px, 9.2vw, 118px);
  --text-figure: clamp(37px, 6.6vw, 85px);
  --weight-heading: 698;
  --weight-body: 400;
  --leading-body: 1.75;
  --leading-heading: 1.28;
  --tracking-heading: 0.006em;
  --radius-sm: 2px;
  --radius-md: 2px;
  --radius-lg: 2px;
  --radius-pill: 2px;
  --border-thin: 1px;
  --border-thick: 2px;
  --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: 1340px;
  --measure: 74ch;
  --gutter: 32px;
  --section-y: 89px;
  --section-y-lg: 125px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background-color: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

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

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

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 140ms linear, background-color 140ms linear, border-color 140ms linear;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

.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;
}

/* ---------------------------------------------------------------
   布局骨架
   --------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-4); }
}

.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }

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

.grid-12 > * { grid-column: 1 / -1; }

@media (min-width: 900px) {
  .grid-12 > .col-3 { grid-column: span 3; }
  .grid-12 > .col-4 { grid-column: span 4; }
  .grid-12 > .col-5 { grid-column: span 5; }
  .grid-12 > .col-6 { grid-column: span 6; }
  .grid-12 > .col-7 { grid-column: span 7; }
  .grid-12 > .col-8 { grid-column: span 8; }
  .grid-12 > .col-9 { grid-column: span 9; }
  .grid-12 > .col-12 { grid-column: span 12; }
}

/* ---------------------------------------------------------------
   分屏系统（视觉核心）
   --------------------------------------------------------------- */
.split {
  display: grid;
  grid-template-columns: 1fr;
  align-items: stretch;
}

.split__side {
  position: relative;
  padding: var(--space-8) var(--space-3);
}

.split__body {
  max-width: 46ch;
}

.split__side--light {
  background-color: var(--color-surface);
  color: var(--color-ink);
}

.split__side--alt {
  background-color: var(--color-surface-alt);
  color: var(--color-ink);
}

.split__side--dark {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.split__side--dark h1,
.split__side--dark h2,
.split__side--dark h3 { color: var(--color-contrast-ink); }

.split__side--dark a { color: var(--color-contrast-accent); }
.split__side--dark .eyebrow { color: var(--color-contrast-accent); }
.split__side--dark .eyebrow::before { background-color: var(--color-contrast-accent); }
.split__side--dark .figure__value { color: var(--color-contrast-ink); }
.split__side--dark .figure__unit { color: var(--color-contrast-line); }
.split__side--dark .ledger__row { border-bottom-color: var(--color-contrast-line); }
.split__side--dark .ledger__label { color: var(--color-contrast-ink); }
.split__side--dark .ledger__value { color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent); }
.split__side--dark .scale-rule__tick { background-color: var(--color-contrast-line); }
.split__side--dark .scale-rule__tick--major { background-color: var(--color-contrast-accent); }

@media (min-width: 900px) {
  .split--3-9 { grid-template-columns: 3fr 9fr; }
  .split--4-8 { grid-template-columns: 4fr 8fr; }
  .split--5-7 { grid-template-columns: 5fr 7fr; }
  .split--6-6 { grid-template-columns: 6fr 6fr; }
  .split--7-5 { grid-template-columns: 7fr 5fr; }
  .split--8-4 { grid-template-columns: 8fr 4fr; }

  .split__side { padding: var(--section-y-lg) var(--space-4); }
  .split__side--dark .split__body { font-size: var(--text-sm); line-height: 1.7; }
}

/* ---------------------------------------------------------------
   排版标签 / 数字 / 状态
   --------------------------------------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.eyebrow::before {
  content: "";
  inline-size: 24px;
  block-size: var(--border-thick);
  background-color: var(--color-accent);
  flex: none;
}

.figure {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
}

.figure__value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.94;
  letter-spacing: -0.03em;
  color: var(--color-ink);
}

.figure__unit {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.state-chip {
  display: inline-block;
  padding: 2px var(--space-1);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

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

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

/* ---------------------------------------------------------------
   刻度分隔
   --------------------------------------------------------------- */
.scale-rule {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  block-size: 16px;
  margin-block: var(--space-4);
}

.scale-rule__tick {
  inline-size: var(--border-thin);
  block-size: 7px;
  background-color: var(--color-line);
  flex: none;
}

.scale-rule__tick--major {
  block-size: 16px;
  background-color: var(--color-ink-muted);
}

/* ---------------------------------------------------------------
   编号清单
   --------------------------------------------------------------- */
.ledger { display: grid; gap: 0; }

.ledger__row {
  display: grid;
  grid-template-columns: 3.2em minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding-block: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  align-items: baseline;
}

.ledger__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.ledger__label {
  font-size: var(--text-base);
  color: var(--color-ink);
}

.ledger__value {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

@media (min-width: 700px) {
  .ledger__row { grid-template-columns: 3.2em minmax(0, 1fr) auto; }
  .ledger__value { grid-column: 3; text-align: right; }
}

/* ---------------------------------------------------------------
   按钮
   --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.2;
  background-color: transparent;
  color: var(--color-ink);
}

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

.btn--primary:hover {
  background-color: color-mix(in srgb, var(--color-primary) 78%, var(--color-contrast-surface));
  border-color: color-mix(in srgb, var(--color-primary) 78%, var(--color-contrast-surface));
}

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

.btn--accent:hover {
  background-color: color-mix(in srgb, var(--color-accent) 80%, var(--color-contrast-surface));
  border-color: color-mix(in srgb, var(--color-accent) 80%, var(--color-contrast-surface));
}

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

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

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

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

/* ---------------------------------------------------------------
   面包屑
   --------------------------------------------------------------- */
.breadcrumb {
  padding-block: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: var(--space-2); }

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--color-line);
}

.breadcrumb__item a:hover { color: var(--color-primary); }

/* ---------------------------------------------------------------
   面板
   --------------------------------------------------------------- */
.panel {
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.panel--alt { background-color: var(--color-surface-alt); }

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

.panel__title {
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

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

/* ---------------------------------------------------------------
   图片容器（展签式）
   --------------------------------------------------------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-deep);
}

.media-frame__img {
  inline-size: 100%;
  block-size: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.media-frame--wide .media-frame__img { aspect-ratio: 16 / 9; }
.media-frame--tall .media-frame__img { aspect-ratio: 3 / 4; }
.media-frame--square .media-frame__img { aspect-ratio: 1 / 1; }

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

.media-frame__caption {
  position: absolute;
  inset-inline-start: 0;
  inset-block-end: 0;
  max-width: 92%;
  padding: var(--space-1) var(--space-2);
  border-block-start: var(--border-thin) solid var(--color-contrast-line);
  background-color: color-mix(in srgb, var(--color-contrast-surface) 86%, transparent);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  line-height: 1.5;
}

/* ---------------------------------------------------------------
   目录
   --------------------------------------------------------------- */
.toc {
  padding-inline-start: var(--space-3);
  border-inline-start: var(--border-thin) solid var(--color-line);
}

.toc__title {
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.toc__list { display: grid; gap: 2px; }

.toc__link {
  display: block;
  padding: 3px var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.toc__link:hover { color: var(--color-primary); }

.toc__link[aria-current="location"] {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
}

/* ---------------------------------------------------------------
   长文
   --------------------------------------------------------------- */
.prose {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.prose > * + * { margin-top: var(--space-3); }

.prose h2 {
  margin-top: var(--space-6);
  font-size: var(--text-xl);
}

.prose h3 {
  margin-top: var(--space-4);
  font-size: var(--text-lg);
}

.prose ul {
  display: grid;
  gap: var(--space-1);
  padding-inline-start: var(--space-3);
}

.prose li { position: relative; }

.prose li::before {
  content: "—";
  position: absolute;
  inset-inline-start: calc(var(--space-3) * -1);
  color: var(--color-accent);
}

.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose strong { font-weight: var(--weight-heading); }

/* ---------------------------------------------------------------
   头部
   --------------------------------------------------------------- */
.skip-link {
  position: absolute;
  inset-inline-start: var(--space-3);
  inset-block-start: var(--space-2);
  z-index: 120;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-contrast-ink);
  color: var(--color-contrast-surface);
  font-size: var(--text-sm);
  transform: translateY(-220%);
  transition: transform 140ms ease-out;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--color-contrast-surface) 62%, transparent);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-contrast-line) 60%, transparent);
  transition: background-color 160ms linear, border-color 160ms linear;
}

.site-header.is-condensed {
  background-color: var(--color-contrast-surface);
  border-bottom-color: var(--color-contrast-line);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-3);
  min-height: 96px;
  transition: min-height 160ms ease-out, padding 160ms ease-out;
}

.site-header.is-condensed .site-header__inner {
  min-height: 64px;
  padding-block: var(--space-2);
}

@media (min-width: 768px) {
  .site-header__inner { padding-inline: var(--space-4); }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: none;
}

.brand__mark {
  inline-size: 12px;
  block-size: 12px;
  background-color: var(--color-primary);
  flex: none;
}

.brand__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.06em;
  color: var(--color-contrast-ink);
}

.brand:hover .brand__name { color: var(--color-contrast-accent); }

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.primary-nav__link {
  display: inline-block;
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

.primary-nav__link:hover {
  color: var(--color-contrast-accent);
}

.primary-nav__link[aria-current="page"] {
  padding-inline: var(--space-2);
  background-color: var(--color-contrast-ink);
  color: var(--color-contrast-surface);
}

.site-header__contact {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.site-header__contact-label {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.site-header__phone {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  white-space: nowrap;
  color: var(--color-contrast-ink);
  padding-inline-start: var(--space-3);
  border-inline-start: var(--border-thin) solid var(--color-contrast-line);
}

.site-header__phone:hover { color: var(--color-contrast-accent); }

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  inline-size: 44px;
  block-size: 44px;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  color: var(--color-contrast-ink);
}

.nav-toggle:hover { border-color: var(--color-contrast-accent); }

.nav-toggle__bar {
  display: block;
  inline-size: 18px;
  block-size: var(--border-thick);
  background-color: currentColor;
}

.nav-toggle[aria-expanded="true"] { border-color: var(--color-contrast-accent); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background-color: var(--color-contrast-accent); }

.scroll-meter {
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  block-size: var(--border-thick);
  background-color: transparent;
}

.scroll-meter__bar {
  display: block;
  block-size: 100%;
  inline-size: 0;
  background-color: var(--color-accent);
  transition: width 120ms linear;
}

/* 桌面导航 */
@media (min-width: 960px) {
  .primary-nav { margin-inline-start: auto; }
  .nav-toggle { display: none; }
}

/* 移动 / 平板导航 */
@media (max-width: 959px) {
  .nav-toggle { display: inline-flex; margin-inline-start: var(--space-2); }

  .site-header__contact { margin-inline-start: auto; }
  .site-header__contact-label { display: none; }
  .site-header__phone {
    padding-inline-start: 0;
    border-inline-start: 0;
    font-size: var(--text-sm);
  }

  .primary-nav {
    position: absolute;
    inset-inline: 0;
    inset-block-start: 100%;
    display: none;
    background-color: var(--color-contrast-surface);
    border-block-start: var(--border-thin) solid var(--color-contrast-line);
    border-block-end: var(--border-thin) solid var(--color-contrast-line);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

  .primary-nav[data-open] { display: block; }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-1) var(--space-3) var(--space-4);
  }

  .primary-nav__link {
    display: block;
    padding-block: var(--space-2);
    font-size: var(--text-base);
    border-block-end: var(--border-thin) solid var(--color-contrast-line);
  }

  .primary-nav__link[aria-current="page"] {
    padding-inline: var(--space-2);
    border-block-end-color: transparent;
  }
}

/* ---------------------------------------------------------------
   页脚
   --------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-surface-alt);
  border-block-start: var(--border-thin) solid var(--color-line);
  padding-block: var(--space-8) var(--space-4);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-6);
}

.footer-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-3);
}

.footer-brand__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-ink);
}

.footer-brand__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.footer-panel {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
}

.footer-panel__title {
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.footer-panel__text {
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.footer-panel--contact {
  background-color: var(--color-contrast-surface);
  border-color: var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

.footer-panel--contact .footer-panel__title { color: var(--color-contrast-accent); }

.footer-panel--note {
  background-color: var(--color-surface);
  border-color: var(--color-line);
}

.footer-panel--note .footer-panel__title { color: var(--color-primary); }

.contact-list { display: grid; gap: var(--space-2); }

.contact-list__row {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
}

.contact-list__row dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}

.contact-list__row dd {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-contrast-ink);
}

.contact-list__link {
  color: var(--color-contrast-ink);
  border-block-end: var(--border-thin) solid var(--color-contrast-line);
}

.contact-list__link:hover {
  color: var(--color-contrast-accent);
  border-block-end-color: var(--color-contrast-accent);
}

.footer-panel--legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  background-color: var(--color-surface);
}

.legal-link {
  padding: 3px var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.legal-link:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.legal-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block-start: var(--space-3);
  border-block-start: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
}

@media (min-width: 900px) {
  .footer-grid { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .footer-panel--contact { grid-column: span 7; }
  .footer-panel--note { grid-column: span 5; }
  .footer-panel--legal { grid-column: span 12; }
  .legal-meta { margin-inline-start: auto; }
}

/* ---------------------------------------------------------------
   动效与无障碍
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .scroll-meter__bar { transition: none; }
}