/* ==========================================================================
   澳门百老汇主站 · 共享样式 /assets/site.css
   Style preset: 单色排版建筑 (mono-type)
   字号跨度造层级 · 留白造分隔 · 链接状态是唯一带颜色的元素
   ========================================================================== */

:root {
  --color-surface: #fafafa;
  --color-surface-alt: #f1f1f1;
  --color-surface-deep: #e5e4e4;
  --color-ink: #4e4546;
  --color-ink-soft: #766b6b;
  --color-ink-muted: #857a7b;
  --color-line: #dbd9da;
  --color-primary: #8e6c6e;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #ebe6e6;
  --color-accent: #d82734;
  --color-accent-ink: #ffffff;
  --color-highlight: #f4d4d6;
  --color-focus: #e01a28;
  --color-contrast-surface: #262122;
  --color-contrast-ink: #e7e4e4;
  --color-contrast-line: #504c4d;
  --color-contrast-accent: #e26068;
  --overlay-scrim: linear-gradient(180deg, rgba(38, 33, 34, 0.35) 0%, rgba(38, 33, 34, 0.72) 55%, rgba(38, 33, 34, 0.92) 100%);
  --font-heading: STZhongsong, "Source Han Serif SC", "Songti SC", SimSun, serif;
  --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 9.3px;
  --text-sm: 13.9px;
  --text-base: 17px;
  --text-lg: 25.5px;
  --text-xl: 38.2px;
  --text-2xl: 57.4px;
  --text-3xl: 86.1px;
  --text-4xl: 129.1px;
  --text-display: clamp(45px, 9.3vw, 119px);
  --text-figure: clamp(38px, 6.7vw, 86px);
  --weight-heading: 565;
  --weight-body: 400;
  --leading-body: 1.86;
  --leading-heading: 1.26;
  --tracking-heading: -0.009em;
  --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: 1080px;
  --measure: 64ch;
  --gutter: 32px;
  --section-y: 125px;
  --section-y-lg: 175px;
}

/* ---------- 1. Reset ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--space-8) + var(--space-6));
}

body {
  margin: 0;
  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);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

input,
select,
textarea {
  font: inherit;
  color: inherit;
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.5em;
}

li {
  margin-bottom: var(--space-1);
}

li:last-child {
  margin-bottom: 0;
}

p {
  margin: 0 0 var(--space-4);
}

hr {
  height: var(--border-thin);
  border: 0;
  margin: var(--space-8) 0;
  background-color: var(--color-line);
}

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

/* ---------- 2. 中文排版与标题阶梯 ---------- */

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);
}

h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-base); font-weight: 600; }
h5,
h6 { font-size: var(--text-sm); }

a {
  color: var(--color-ink);
  text-decoration: none;
}

.prose a,
.link {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: var(--border-thin);
  text-underline-offset: 4px;
  transition: color 140ms ease, background-color 140ms ease;
}

.prose a:hover,
.prose a:focus-visible,
.link:hover,
.link:focus-visible {
  color: var(--color-focus);
  background-color: var(--color-highlight);
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* ---------- 3. 字号工具类（严格分层，不得互相挪用） ---------- */

.t-display {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.06;
  letter-spacing: var(--tracking-heading);
}

.t-figure,
.section-no {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.t-3xl {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.t-2xl {
  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);
}

.t-xl {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.t-lg { font-size: var(--text-lg); line-height: 1.6; }
.t-sm { font-size: var(--text-sm); }
.t-xs { font-size: var(--text-xs); }

.mono,
.meta-mono,
.index-no,
.batch-no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

.lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-ink-soft);
  max-width: 32em;
}

/* ---------- 4. 跳转链接 ---------- */

.skip-link {
  position: fixed;
  top: 0;
  left: var(--space-4);
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
  color: var(--color-contrast-accent);
}

/* ---------- 5. 头部 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.site-header__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-4) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.site-header__brand {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand__mark {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--color-ink);
  transition: color 140ms ease;
}

.brand__domain {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  color: var(--color-accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav__list {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: 2px 0;
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--color-ink-soft);
  transition: color 140ms ease;
}

.site-nav__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  transition: color 140ms ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-accent);
}

.site-nav__link:hover .site-nav__index,
.site-nav__link:focus-visible .site-nav__index {
  color: var(--color-accent);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
}

.site-nav__link[aria-current="page"] .site-nav__index {
  color: var(--color-accent);
}

.site-index-link {
  position: relative;
  padding-left: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
  white-space: nowrap;
  transition: color 140ms ease;
}

.site-index-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: var(--border-thin);
  height: 14px;
  margin-top: -7px;
  background-color: var(--color-line);
}

.site-index-link:hover,
.site-index-link:focus-visible {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink);
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 20px;
  height: 9px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: var(--border-thin);
  background-color: currentColor;
  transition: transform 160ms ease;
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-4px) rotate(-45deg);
}

/* ---------- 6. 页脚 ---------- */

.site-footer {
  margin-top: var(--section-y);
  padding-top: var(--space-8);
  background-color: var(--color-surface);
  border-top: var(--border-thin) solid var(--color-line);
}

.site-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.3fr);
  gap: var(--space-8) var(--space-6);
}

.site-footer__col {
  min-width: 0;
}

.site-footer__brandname {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.site-footer__domain {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

.site-footer__icp {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  margin: 0;
}

.site-footer__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-4);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__list li {
  margin: 0 0 var(--space-2);
}

.site-footer__list a {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  transition: color 140ms ease;
}

.site-footer__list a:hover,
.site-footer__list a:focus-visible {
  color: var(--color-accent);
}

.site-footer__line {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-2);
}

.site-footer__note {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
  margin: 0;
}

.site-footer__base {
  max-width: var(--container);
  margin: var(--space-8) auto 0;
  padding: var(--space-4) var(--gutter);
  border-top: var(--border-thin) solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2) var(--space-6);
}

.site-footer__base p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

/* ---------- 7. 容器 · 栅格 · 区块 ---------- */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

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

.section {
  padding: var(--section-y) 0;
}

.section--lg {
  padding: var(--section-y-lg) 0;
}

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

.section--deep {
  background-color: var(--color-surface-deep);
}

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

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

.section--contrast .eyebrow,
.section--contrast .meta-mono,
.section--contrast .index-no,
.section--contrast .batch-no,
.section--contrast .lead {
  color: var(--color-contrast-ink);
}

.section--contrast .section-no,
.section--contrast .t-figure {
  color: var(--color-contrast-accent);
}

.section--contrast a {
  color: var(--color-contrast-accent);
}

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

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.split {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: var(--gutter) var(--space-6);
}

.split--reverse {
  grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
}

.rule {
  height: var(--border-thin);
  border: 0;
  margin: var(--space-8) 0;
  background-color: var(--color-line);
}

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

/* ---------- 8. 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  line-height: 1.2;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 150ms ease, color 150ms ease;
}

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

.btn--solid:hover,
.btn--solid:focus-visible {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.btn--quiet {
  padding: var(--space-1) 0;
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: var(--border-thin);
  text-underline-offset: 5px;
}

.btn--quiet:hover,
.btn--quiet:focus-visible {
  color: var(--color-focus);
  background-color: var(--color-highlight);
}

/* ---------- 9. 面包屑 ---------- */

.breadcrumb {
  margin: 0 0 var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li {
  margin: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--color-line);
}

.breadcrumb a {
  color: var(--color-ink-soft);
  transition: color 140ms ease;
}

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

/* ---------- 10. 索引行 · 命中高亮 ---------- */

.row-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.row-list__item {
  margin: 0;
  padding: var(--space-3) var(--space-2);
  transition: background-color 150ms ease;
}

.row-list__item:hover {
  background-color: var(--color-primary-soft);
}

.mark-hit {
  background-color: var(--color-highlight);
  color: var(--color-ink);
}

/* ---------- 11. 字母通道 ---------- */

.alpha-jump {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.alpha-jump li {
  margin: 0;
}

.alpha-jump__link {
  display: block;
  min-width: 2.2em;
  padding: var(--space-1) 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  transition: background-color 140ms ease, color 140ms ease;
}

.alpha-jump__link:hover,
.alpha-jump__link:focus-visible {
  color: var(--color-accent);
  background-color: var(--color-primary-soft);
}

.alpha-jump__link.is-active {
  background-color: var(--color-highlight);
  color: var(--color-accent);
}

/* ---------- 12. 折叠内容组 ---------- */

.collapse {
  margin: 0;
  padding: 0;
  list-style: none;
}

.collapse__item {
  margin: 0;
}

.collapse__trigger {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-4) var(--space-2);
  text-align: left;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  transition: background-color 150ms ease, color 150ms ease;
}

.collapse__trigger:hover,
.collapse__trigger:focus-visible {
  background-color: var(--color-primary-soft);
  color: var(--color-accent);
}

.collapse__trigger[aria-expanded="true"] {
  color: var(--color-accent);
}

.collapse__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.collapse__trigger[aria-expanded="true"] .collapse__no {
  color: var(--color-accent);
}

.collapse__panel {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 240ms ease, visibility 240ms ease;
}

.collapse__panel > .collapse__inner {
  overflow: hidden;
}

.collapse__trigger[aria-expanded="true"] + .collapse__panel {
  grid-template-rows: 1fr;
  visibility: visible;
}

.collapse__inner > *:last-child {
  margin-bottom: var(--space-4);
}

/* ---------- 13. 锚点目录 ---------- */

.anchor-nav {
  position: sticky;
  top: calc(var(--space-8) + var(--space-6));
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.anchor-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.anchor-nav__list li {
  margin: 0;
}

.anchor-nav__link {
  display: block;
  padding: 2px 0;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  transition: color 140ms ease;
}

.anchor-nav__link:hover,
.anchor-nav__link:focus-visible {
  color: var(--color-accent);
}

.anchor-nav__link.is-current {
  color: var(--color-accent);
}

.anchor-nav__link.is-current::before {
  content: "—";
  margin-right: 6px;
}

/* ---------- 14. 图片容器与展签 ---------- */

.figure {
  margin: 0;
}

.figure__media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-surface-deep);
}

.figure__media--tall { aspect-ratio: 3 / 4; }
.figure__media--wide { aspect-ratio: 21 / 9; }
.figure__media--square { aspect-ratio: 1 / 1; }

.figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.03) brightness(0.96);
}

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

.figure__overlay {
  position: absolute;
  left: var(--space-4);
  right: var(--space-4);
  bottom: var(--space-4);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
}

.figure__caption {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.figure__caption::before {
  content: "—";
  color: var(--color-primary);
}

/* ---------- 15. 滚动进度条 ---------- */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  z-index: 120;
  background-color: var(--color-accent);
  pointer-events: none;
}

/* ---------- 16. 响应式 ---------- */

@media (max-width: 1023px) {
  .site-header__inner {
    flex-wrap: wrap;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-3) 0 var(--space-2);
  }

  .site-nav[data-open] {
    display: flex;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item {
    margin: 0;
  }

  .site-nav__link {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: var(--weight-heading);
    line-height: var(--leading-heading);
    color: var(--color-ink);
  }

  .site-nav__index {
    font-size: var(--text-xs);
  }

  .site-index-link {
    display: inline-block;
    margin-top: var(--space-2);
    padding-left: 0;
  }

  .site-index-link::before {
    display: none;
  }

  .site-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split,
  .split--reverse {
    grid-template-columns: minmax(0, 1fr);
  }

  .anchor-nav {
    position: static;
  }
}

@media (max-width: 767px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section { padding: var(--space-8) 0; }
  .section--lg { padding: var(--space-8) 0; }
  .site-footer { margin-top: var(--space-8); }
}

@media (max-width: 599px) {
  .site-header__inner,
  .site-footer__inner,
  .site-footer__base,
  .container {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }

  .grid--2,
  .grid--3,
  .grid--12 {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-6);
  }

  .site-footer__base {
    flex-direction: column;
  }

  .collapse__trigger {
    font-size: var(--text-base);
  }
}

/* ---------- 17. 动效偏好 ---------- */

@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-behavior: auto !important;
  }
}