/* ==========================================================================
   36旧版 · 共享样式 /assets/site.css
   框架式导航 · 档案色带 · 纵向叙事长卷
   ========================================================================== */

/* 1. Reset ---------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol, pre {
  margin: 0;
}

ul[class], ol[class] { list-style: none; padding: 0; }

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

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

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

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

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }

/* 2. Tokens --------------------------------------------------------------- */
:root {
  --paper: #E7DFD0;
  --paper-deep: #DCD2BF;
  --panel: #F6F1E7;
  --ink: #1B1916;
  --ink-2: #3A342C;
  --orange: #B84A12;
  --orange-soft: #E7B08A;
  --teal: #4C6B69;
  --ochre: #9A6B1F;
  --line: #A69C8D;
  --line-soft: rgba(166, 156, 141, .5);
  --focus: #2E5A88;

  --on-dark: rgba(231, 223, 208, .72);
  --on-dark-line: rgba(166, 156, 141, .34);

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --sans: "Noto Sans SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1240px;
  --gut: 24px;
  --u: 8px;

  --r-sm: 3px;
  --r-md: 14px;
  --r-lg: 26px;

  --shadow-card: 0 1px 0 rgba(27, 25, 22, .06), 0 18px 34px -28px rgba(27, 25, 22, .6);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 180ms;
}

/* 3. Base ----------------------------------------------------------------- */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(120% 90% at 8% -10%, rgba(231, 176, 138, .40) 0%, rgba(231, 176, 138, 0) 46%),
    radial-gradient(90% 80% at 100% 0%, rgba(76, 107, 105, .16) 0%, rgba(76, 107, 105, 0) 44%),
    repeating-linear-gradient(0deg, rgba(27, 25, 22, .035) 0 1px, rgba(27, 25, 22, 0) 1px 4px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

main,
#main-content,
[role="main"] { flex: 1 0 auto; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: .01em;
  color: var(--ink);
}

p { text-wrap: pretty; }

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

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

.visually-hidden {
  position: absolute !important;
  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;
}

.is-hidden { display: none !important; }

/* 4. 页头 · 框架式导航 ---------------------------------------------------- */
.skip-link {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, -160%);
  padding: .625rem 1.25rem;
  font-family: var(--mono);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--panel);
  background: var(--ink);
  border-radius: 0 0 6px 6px;
  text-decoration: none;
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.site-header {
  position: relative;
  z-index: 60;
  background: var(--paper);
  border-top: 6px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

/* 滚动阅读进度 */
.read-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 120;
  background: rgba(166, 156, 141, .32);
  pointer-events: none;
}

.read-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--orange) 0%, var(--ochre) 62%, var(--teal) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 120ms linear;
}

/* 顶部规格栏 */
.hdr-rule { background: var(--ink); color: var(--paper); }

.hdr-rule__inner {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding: .4375rem var(--gut);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .14em;
}

.hdr-rule__line { color: var(--paper); opacity: .86; }

.hdr-rule__meta {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-left: auto;
  color: var(--orange-soft);
  letter-spacing: .12em;
}

.hdr-rule__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--orange-soft);
  box-shadow: 0 0 0 3px rgba(231, 176, 138, .18);
}

.hdr-util { display: flex; align-items: center; gap: .875rem; }

.hdr-util__link {
  color: var(--paper);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.hdr-util__link:hover { color: var(--orange-soft); border-bottom-color: var(--orange-soft); }

.hdr-util__link--cta {
  padding: .1875rem .5rem;
  color: var(--panel);
  background: var(--orange);
  border-radius: var(--r-sm);
  border-bottom: 0;
  letter-spacing: .1em;
}

.hdr-util__link--cta:hover { color: var(--ink); background: var(--orange-soft); }

/* 刊头层 */
.hdr-main { border-bottom: 1px solid var(--line-soft); }

.hdr-main__inner {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding: 1.125rem var(--gut);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: .75rem;
  text-decoration: none;
  color: var(--ink);
}

.brand__mark {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--panel);
  background: var(--orange);
  border: 2px solid var(--ink);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px var(--paper);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.brand:hover .brand__mark { background: var(--teal); transform: rotate(-6deg); }

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

.brand__name {
  font-family: var(--serif);
  font-size: 1.375rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: .06em;
}

.brand__sub {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--ink-2);
}

/* 检索台 */
.hdr-search {
  margin-left: auto;
  width: min(420px, 44vw);
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.hdr-search__label {
  font-family: var(--mono);
  font-size: .625rem;
  letter-spacing: .22em;
  color: var(--ink-2);
}

.hdr-search__field {
  display: flex;
  align-items: stretch;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--ink);
  border-radius: var(--r-sm);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.hdr-search__field:focus-within {
  border-color: var(--teal);
  box-shadow: 0 0 0 2px rgba(76, 107, 105, .35);
}

.hdr-search__input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  padding: .5rem .625rem;
  font-size: .8125rem;
  line-height: 1.5;
  background: transparent;
  color: var(--ink);
}

.hdr-search__input::placeholder { color: rgba(58, 52, 44, .6); }

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

.hdr-search__submit {
  display: grid;
  place-items: center;
  padding: 0 .75rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  white-space: nowrap;
  text-decoration: none;
  color: var(--panel);
  background: var(--teal);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.hdr-search__submit:hover { background: var(--ink); color: var(--panel); }

.hdr-search__hint {
  min-height: 1.1em;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .04em;
  line-height: 1.5;
  color: var(--ink-2);
}

.hdr-search__hint[data-state="warn"] { color: var(--ochre); }

/* 目录开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .5rem .75rem;
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--panel);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--r-sm);
  transition: background-color var(--dur) var(--ease);
}

.nav-toggle:hover { background: var(--teal); border-color: var(--teal); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 14px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.nav-toggle__text { line-height: 1; }

/* 导航格 */
.site-nav {
  background: var(--paper);
  border-top: 1px solid var(--line-soft);
}

.site-nav__inner {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding-inline: var(--gut);
  display: flex;
  align-items: stretch;
  gap: 1.25rem;
}

.site-nav__tag {
  display: flex;
  align-items: center;
  padding-right: 1rem;
  font-family: var(--mono);
  font-size: .625rem;
  letter-spacing: .3em;
  color: var(--ink-2);
  border-right: 1px solid var(--line-soft);
}

.site-nav__list { display: flex; flex: 1 1 auto; flex-wrap: wrap; }

.site-nav__list > li { display: flex; }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: .875rem .9375rem;
  font-size: .875rem;
  letter-spacing: .08em;
  color: var(--ink-2);
  text-decoration: none;
  border-right: 1px solid var(--line-soft);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__list > li:first-child .site-nav__link { border-left: 1px solid var(--line-soft); }

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 3px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.site-nav__link:hover { color: var(--ink); background: rgba(246, 241, 231, .8); }

.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] {
  color: var(--orange);
  font-weight: 600;
  background: var(--panel);
}

.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* 5. 页脚 ---------------------------------------------------------------- */
.site-footer {
  position: relative;
  z-index: 2;
  margin-top: 5rem;
  color: var(--paper);
  background: var(--ink);
  border-top: 8px solid var(--orange);
}

.ftr-top { border-bottom: 1px solid var(--on-dark-line); }

.ftr-top__inner {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding: 2.75rem var(--gut) 2.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 2rem;
}

.ftr-brand {
  flex: 0 0 auto;
  padding-left: .75rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .26em;
  color: var(--orange-soft);
  border-left: 3px solid var(--orange);
}

.ftr-line {
  flex: 1 1 340px;
  font-family: var(--serif);
  font-size: clamp(1.0625rem, 2vw, 1.5rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--panel);
}

.ftr-top__inner .btn { flex: 0 0 auto; }

.ftr-body {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding: 2.5rem var(--gut) 2.25rem;
}

.ftr-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2rem 1.5rem;
}

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

.ftr-title {
  padding-bottom: .5rem;
  margin-bottom: 1rem;
  font-family: var(--mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--orange-soft);
  border-bottom: 1px solid var(--on-dark-line);
}

.ftr-list { display: flex; flex-direction: column; gap: .5rem; }

.ftr-list a {
  display: inline-block;
  font-size: .9375rem;
  color: var(--paper);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.ftr-list a:hover {
  color: var(--orange-soft);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.ftr-contact li {
  display: flex;
  flex-direction: column;
  gap: .125rem;
  font-size: .875rem;
  line-height: 1.6;
  color: var(--on-dark);
  word-break: break-word;
}

.ftr-label {
  font-family: var(--mono);
  font-size: .625rem;
  letter-spacing: .18em;
  color: rgba(231, 223, 208, .55);
}

.ftr-note {
  margin-top: .875rem;
  font-size: .75rem;
  line-height: 1.7;
  color: rgba(231, 223, 208, .55);
}

.ftr-table { min-width: 0; }

.mini-table { font-family: var(--mono); font-size: .75rem; }

.mini-table__cap {
  caption-side: top;
  padding-bottom: .5rem;
  text-align: left;
  font-family: var(--sans);
  font-size: .6875rem;
  line-height: 1.6;
  color: rgba(231, 223, 208, .6);
}

.mini-table th {
  padding: .375rem .5rem .375rem 0;
  text-align: left;
  font-family: var(--mono);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--orange-soft);
  border-bottom: 1px solid var(--on-dark-line);
}

.mini-table td {
  padding: .4375rem .5rem .4375rem 0;
  color: var(--on-dark);
  border-bottom: 1px solid rgba(166, 156, 141, .18);
  vertical-align: top;
}

.ftr-table__link {
  display: inline-block;
  margin-top: .75rem;
  padding-bottom: 2px;
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.ftr-table__link:hover { color: var(--panel); }

.ftr-base {
  background: rgba(0, 0, 0, .22);
  border-top: 1px solid var(--on-dark-line);
}

.ftr-base__inner {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding: 1.125rem var(--gut);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1.5rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .08em;
  color: var(--on-dark);
}

.ftr-copy { color: var(--paper); }

.ftr-icp { color: var(--on-dark); }

.ftr-footnote { margin-left: auto; color: rgba(231, 223, 208, .5); }

/* 6. 通用组件 ------------------------------------------------------------ */
.page-wrap {
  width: min(100%, var(--wrap));
  margin-inline: auto;
  padding-inline: var(--gut);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .6875rem 1.125rem;
  font-family: var(--sans);
  font-size: .875rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: .06em;
  text-decoration: none;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn:active { transform: translateY(0); }

.btn--solid {
  color: var(--panel);
  background: var(--orange);
  border-color: var(--orange);
}

.btn--solid:hover { color: var(--panel); background: var(--teal); border-color: var(--teal); }

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

.btn--ink:hover { color: var(--panel); background: var(--teal); border-color: var(--teal); }

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

.btn--ghost:hover { background: var(--panel); border-color: var(--ink); }

.btn--quiet { color: var(--ink); background: var(--panel); border-color: transparent; }

.btn--quiet:hover { background: var(--orange-soft); }

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .375rem;
  padding: 1rem 0 0;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--ink-2);
}

.crumbs li { display: flex; align-items: center; gap: .375rem; }

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

.crumbs a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(76, 107, 105, .4);
}

.crumbs a:hover { color: var(--orange); border-bottom-color: var(--orange); }

.crumbs [aria-current="page"] { color: var(--ink); }

/* 章节节律 */
.band {
  height: 12px;
  width: 100%;
  background: var(--orange);
  border-radius: 2px;
}

.band--teal { background: var(--teal); }
.band--ochre { background: var(--ochre); }

.chapter-no {
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .22em;
  color: var(--orange);
}

.note-side {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--serif);
  font-size: .75rem;
  letter-spacing: .26em;
  color: var(--ink-2);
}

/* 图像容器基础规则（页面阶段放置 img 或内联 SVG） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(158deg, var(--orange-soft) 0%, var(--paper-deep) 58%, rgba(76, 107, 105, .35) 100%);
  border: 1px solid rgba(27, 25, 22, .16);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
}

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

.media-frame img,
.media-frame svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-figure { display: block; }

.media-figure figcaption {
  margin-top: .5rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--ink-2);
}

/* 7. 宽屏页侧框架线 ------------------------------------------------------ */
@media (min-width: 1400px) {
  body::before,
  body::after {
    content: "";
    position: fixed;
    top: 0;
    bottom: 0;
    width: 1px;
    z-index: 1;
    background: var(--line-soft);
    pointer-events: none;
  }

  body::before { left: 28px; }
  body::after { right: 28px; }
}

/* 8. 响应式 ------------------------------------------------------------- */
@media (max-width: 1080px) {
  :root { --gut: 20px; }

  .hdr-search { width: min(360px, 42vw); }

  .site-nav__link { padding: .8125rem .75rem; font-size: .8125rem; }

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

  .ftr-col--table { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .hdr-rule__inner { gap: .875rem; }

  .hdr-main__inner {
    flex-wrap: wrap;
    gap: .875rem 1rem;
    padding-block: 1rem;
  }

  .brand__mark { width: 40px; height: 40px; font-size: 1.125rem; }
  .brand__name { font-size: 1.1875rem; }

  .nav-toggle { display: inline-flex; margin-left: auto; }

  .hdr-search {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

  .site-nav { display: none; background: var(--paper-deep); }

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

  .site-nav__inner {
    flex-direction: column;
    gap: 0;
    padding-inline: 0;
  }

  .site-nav__tag {
    width: 100%;
    padding: .625rem var(--gut);
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .site-nav__list { flex-direction: column; width: 100%; }

  .site-nav__list > li { display: block; }

  .site-nav__link {
    width: 100%;
    justify-content: space-between;
    padding: .9375rem var(--gut);
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .site-nav__list > li:first-child .site-nav__link { border-left: 0; }

  .site-nav__link::after {
    top: 0; bottom: 0; left: 0; right: auto;
    width: 3px;
    height: auto;
    transform: scaleY(0);
    transform-origin: top center;
  }

  .site-nav__link:hover { background: rgba(246, 241, 231, .6); }

  .site-nav__link:hover::after,
  .site-nav__link[aria-current="page"]::after { transform: scaleY(1); }

  .site-footer { margin-top: 3.5rem; }

  .ftr-top__inner { padding-block: 2.25rem 1.75rem; }

  .ftr-footnote { margin-left: 0; }
}

@media (max-width: 760px) {
  .hdr-rule__meta { display: none; }

  .hdr-rule__line { letter-spacing: .1em; }

  .hdr-util { margin-left: auto; }

  .ftr-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.75rem 1.25rem; }
}

@media (max-width: 560px) {
  :root { --gut: 16px; }

  body { background-attachment: scroll; }

  .hdr-rule__inner { flex-wrap: wrap; gap: .5rem; padding-block: .5rem; }

  .hdr-rule__line { font-size: .625rem; letter-spacing: .08em; }

  .hdr-util { margin-left: 0; gap: .625rem; }

  .brand { gap: .625rem; }

  .brand__sub { font-size: .625rem; letter-spacing: .14em; }

  .nav-toggle { padding: .4375rem .625rem; font-size: .6875rem; }

  .hdr-search__label { font-size: .5938rem; }

  .site-footer { border-top-width: 6px; }

  .ftr-top__inner { padding-block: 2rem 1.5rem; gap: 1rem; }

  .ftr-top__inner .btn { width: 100%; }

  .ftr-grid { grid-template-columns: 1fr; }

  .ftr-col--table { grid-column: auto; }

  .mini-table { font-size: .6875rem; }

  .ftr-base__inner { flex-direction: column; align-items: flex-start; gap: .375rem; }
}

/* 9. 打印 ---------------------------------------------------------------- */
@media print {
  body { background: #fff; color: #000; }

  .read-progress,
  .nav-toggle,
  .skip-link,
  .ftr-top__inner .btn { display: none !important; }

  .site-header,
  .site-footer { border-color: #000; }

  .site-footer { background: #fff; color: #000; margin-top: 1.5rem; }

  .ftr-line,
  .ftr-list a,
  .ftr-copy,
  .mini-table td { color: #000; }

  .mini-table th,
  .ftr-title,
  .ftr-brand { color: #333; }

  .mini-table td { border-bottom: 1px solid #999; }

  a { text-decoration: none; }
}

/* 10. 降低动效偏好 ------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .read-progress__bar { transition: none; }

  .btn:hover,
  .brand:hover .brand__mark { transform: none; }
}