/* ============================================================
   荣一游艺 · 共享样式表 /assets/site.css
   江雾青文字建筑 · 奶油纸白底 · 深棕黑粗边 · 暖橙点色
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; }

:root {
  /* 色板 */
  --jiang: #2F7F86;
  --jiang-light: #E3F0F0;
  --cream: #F7F3EA;
  --paper: #FCFCFA;
  --ink: #241E1B;
  --orange: #F0743A;
  --orange-deep: #E9682C;
  --orange-sand: #FBE0D1;
  --slate: #6E7A7C;
  --deep: #1B4A4E;
  --neon: #7FD4D9;
  --ink-soft: #3A322D;

  /* 结构 */
  --hair: 1px solid var(--jiang-light);
  --hard-shadow: 6px 6px 0 var(--ink);
  --hard-shadow-sm: 4px 4px 0 var(--ink);
  --shell: 1240px;
  --pad: clamp(1.15rem, 4vw, 3rem);
  --radius: 2px;

  /* 字体 */
  --font-display: "Helvetica Neue Condensed", "Arial Narrow", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
  text-rendering: optimizeLegibility;
}

main, #main-content { flex: 1 0 auto; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -.02em;
}

strong { font-weight: 700; }
.mono { font-family: var(--font-mono); font-size: .94em; letter-spacing: .02em; }

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

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

/* ---------- 外壳容器 ---------- */
.shell {
  width: min(calc(100% - var(--pad) * 2), var(--shell));
  margin-inline: auto;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 140;
  background: var(--ink);
  color: var(--cream);
  padding: .7rem 1.1rem;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  border: 2px solid var(--ink);
}
.skip-link:focus,
.skip-link:focus-visible {
  position: fixed;
  left: var(--pad);
  top: .75rem;
  outline: 3px solid var(--neon);
  outline-offset: 2px;
}

/* ---------- 阅读进度细线 ---------- */
.read-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--jiang-light);
  z-index: 120;
}
.read-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--jiang), var(--neon));
  transition: width .12s linear;
}

/* ---------- 页头：紧凑命令栏 ---------- */
.site-header {
  position: sticky;
  top: 3px;
  z-index: 100;
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
}

.cmdbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas: "brand nav actions";
  align-items: center;
  column-gap: clamp(.75rem, 2vw, 1.8rem);
  min-height: 66px;
}

.brand {
  grid-area: brand;
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  padding-block: .7rem;
  text-decoration: none;
  color: var(--ink);
}
.brand__mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  background: var(--jiang);
  color: var(--paper);
  border: 2px solid var(--ink);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--slate);
}
.brand:hover .brand__sub { color: var(--orange); }

.cmdnav {
  grid-area: nav;
  display: flex;
  align-items: center;
  min-width: 0;
}
.cmdnav__list {
  display: flex;
  align-items: stretch;
  gap: .1rem;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.cmdnav__list::-webkit-scrollbar { display: none; }
.cmdnav__link {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding: .95rem .52rem .78rem;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.cmdnav__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--slate);
  transition: color .12s linear;
}
.cmdnav__label { letter-spacing: .02em; }
.cmdnav__link:hover { color: var(--jiang); border-bottom-color: var(--jiang-light); }
.cmdnav__link:hover .cmdnav__idx { color: var(--orange); }
.cmdnav__link[aria-current="page"],
.cmdnav__link[aria-current="page"]:hover {
  color: var(--jiang);
  font-weight: 700;
  border-bottom-color: var(--orange);
}
.cmdnav__link[aria-current="page"] .cmdnav__idx { color: var(--orange); }
.cmdnav__cta { display: none; }

.cmdbar__actions {
  grid-area: actions;
  display: flex;
  align-items: center;
  gap: .6rem;
  justify-self: end;
}

.navtoggle {
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .5rem .68rem;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 0;
  box-shadow: 3px 3px 0 var(--ink);
  cursor: pointer;
  transition: box-shadow .16s var(--ease), transform .16s var(--ease), background .16s var(--ease);
}
.navtoggle__bars { display: grid; gap: 3px; width: 16px; }
.navtoggle__bars span { display: block; height: 2px; background: var(--ink); }
.navtoggle__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
}
.navtoggle[aria-expanded="true"] { background: var(--jiang-light); }
.navtoggle:hover { transform: translate(1px, 1px); box-shadow: 2px 2px 0 var(--ink); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .62rem 1rem;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.2;
  text-decoration: none;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 0;
  box-shadow: var(--hard-shadow-sm);
  transition: transform .16s var(--ease), box-shadow .16s var(--ease), background .16s var(--ease), color .16s var(--ease);
}
.btn:hover { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }
.btn--accent { background: var(--orange); color: var(--ink); }
.btn--accent:hover { background: var(--orange-deep); }
.btn--ghost { background: transparent; box-shadow: none; }
.btn--ghost:hover { background: var(--jiang-light); transform: none; box-shadow: none; }

/* ---------- 页码索引 / 章节眉标 ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--slate);
}
.sec-index {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(3.4rem, 9vw, 7rem);
  line-height: .84;
  letter-spacing: -.03em;
  color: var(--slate);
  transition: color .18s var(--ease);
}
.sec-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 600;
  letter-spacing: -.01em;
}
.lede {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 38ch;
}
.hairline { border-top: var(--hair); }

/* ---------- 编号章节 ---------- */
.section {
  position: relative;
  padding-block: clamp(2.4rem, 6vw, 4.6rem);
  border-top: var(--hair);
}
.section.is-current .sec-index { color: var(--jiang); }
.section.is-current .eyebrow { color: var(--orange); }

/* ---------- 页首 ---------- */
.page-head {
  padding-block: clamp(2.4rem, 6vw, 4.4rem) clamp(1.4rem, 3vw, 2.2rem);
}
.page-title {
  font-size: clamp(2.2rem, 5.6vw, 4.4rem);
  font-weight: 600;
  letter-spacing: -.025em;
  max-width: 22ch;
}
.page-lede {
  margin-top: clamp(.9rem, 2vw, 1.4rem);
  font-size: clamp(1rem, 1.4vw, 1.16rem);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 42ch;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  padding-block: 1.1rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--slate);
}
.breadcrumb a { color: var(--slate); text-decoration: none; }
.breadcrumb a:hover { color: var(--jiang); }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: .5rem; color: var(--jiang); }

/* ---------- 栅格 ---------- */
.grid12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.4vw, 2rem);
}
.g-2 { grid-column: span 2; }
.g-3 { grid-column: span 3; }
.g-4 { grid-column: span 4; }
.g-5 { grid-column: span 5; }
.g-6 { grid-column: span 6; }
.g-7 { grid-column: span 7; }
.g-8 { grid-column: span 8; }
.g-9 { grid-column: span 9; }
.g-12 { grid-column: span 12; }
.rail {
  border-right: var(--hair);
  padding-right: clamp(.8rem, 2vw, 1.8rem);
}

/* ---------- 正文 ---------- */
.prose { max-width: 66ch; }
.prose p { max-width: 66ch; }
.prose p + p { margin-top: 1.4em; }
.prose h2 {
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  margin-top: 2.2em;
  margin-bottom: .7em;
}
.prose h3 {
  font-size: 1.18rem;
  margin-top: 1.8em;
  margin-bottom: .5em;
}
.prose ul, .prose ol { display: grid; gap: .6rem; margin-top: 1em; }
.prose li { position: relative; padding-left: 1.4rem; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: .6rem;
  height: 2px;
  background: var(--jiang);
}
.prose a {
  color: var(--jiang);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--orange); }

/* ---------- 卡片 ---------- */
.card {
  display: block;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--hard-shadow);
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.card:hover { transform: translate(2px, 2px); box-shadow: 4px 4px 0 var(--ink); }
.card--accent { background: var(--orange-sand); }
.card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
.card__meta {
  margin-top: .35rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--slate);
}
.card__text { margin-top: .7rem; font-size: 15px; color: var(--ink-soft); }
.card__link {
  display: inline-block;
  margin-top: 1rem;
  font-size: 14px;
  font-weight: 600;
  color: var(--jiang);
  text-decoration: none;
  border-bottom: 2px solid var(--jiang-light);
}
.card__link:hover { color: var(--orange); border-bottom-color: var(--orange); }

/* ---------- 提示条 ---------- */
.notice {
  display: flex;
  align-items: flex-start;
  gap: .8rem;
  background: var(--orange-sand);
  border-left: 4px solid var(--orange);
  padding: .9rem 1.1rem;
  font-size: 15px;
  color: var(--ink-soft);
}
.notice__label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: #8A3A12;
  padding-top: .18em;
}

/* ---------- 关键数字 ---------- */
.metric {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--jiang);
}

/* ---------- 图文容器 ---------- */
.figure { display: block; margin: 0; }
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 7;
  background: var(--jiang-light);
  border: 2px solid var(--ink);
  box-shadow: var(--hard-shadow);
}
.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 4 / 5; }
.media img, .media svg, .media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__caption {
  margin-top: .55rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--slate);
}

/* ---------- 时间轴 ---------- */
.timeline { position: relative; }
.timeline--y {
  display: grid;
  gap: 0;
  border-left: 2px solid var(--ink);
  padding-left: clamp(1rem, 2.4vw, 1.8rem);
}
.timeline--y .timeline__item { padding-block: 1.4rem; border-bottom: var(--hair); }
.timeline--x {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 1fr);
  overflow-x: auto;
  border-top: 2px solid var(--ink);
  border-bottom: var(--hair);
}
.timeline--x .timeline__item {
  padding: 1.4rem 1.2rem;
  border-right: var(--hair);
  min-width: 0;
}
.timeline__date {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--jiang);
}
.timeline__title {
  margin-top: .4rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -.01em;
}
.timeline__body {
  display: none;
  margin-top: .7rem;
  font-size: 15px;
  color: var(--ink-soft);
}
.timeline__item[data-open] .timeline__body { display: block; }
.timeline__toggle {
  margin-top: .8rem;
  padding: .35rem .7rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  background: var(--paper);
  border: 1px solid var(--ink);
  cursor: pointer;
}
.timeline__toggle:hover { background: var(--jiang-light); }

/* ---------- 数据列表 ---------- */
.datalist {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.datalist th {
  text-align: left;
  padding: .7rem .8rem;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--slate);
  border-bottom: 2px solid var(--ink);
}
.datalist td {
  padding: .75rem .8rem;
  border-bottom: var(--hair);
  vertical-align: top;
}
.datalist tbody tr:nth-child(even) { background: var(--jiang-light); }

/* ---------- 折叠问答 ---------- */
.faq {
  display: grid;
  border-top: 2px solid var(--ink);
}
.faq__item { border-bottom: var(--hair); }
.faq__q {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem .2rem;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -.01em;
  transition: color .16s var(--ease);
}
.faq__q:hover { color: var(--jiang); }
.faq__sign {
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--orange);
  line-height: 1.4;
}
.faq__item[data-open] .faq__sign { color: var(--jiang); }
.faq__a {
  display: none;
  padding: 0 .2rem 1.3rem;
  max-width: 72ch;
  color: var(--ink-soft);
  font-size: 15px;
}
.faq__item[data-open] .faq__a { display: block; }

/* ---------- 标签墙 ---------- */
.tagwall {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}
.tagwall__btn {
  padding: .32rem .62rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--deep);
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
  transition: background .16s var(--ease), color .16s var(--ease);
}
.tagwall__btn:hover { background: var(--jiang-light); }
.tagwall__btn[aria-pressed="true"] {
  background: var(--jiang);
  color: var(--paper);
  border-color: var(--ink);
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .28rem .6rem;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  background: var(--jiang-light);
  color: var(--deep);
  border: 1px solid rgba(36, 30, 27, .25);
}
.tag--accent { background: var(--orange-sand); color: #8A3A12; }

/* ---------- 出场动效 ---------- */
[data-reveal] {
  transition: opacity .34s var(--ease), transform .34s var(--ease);
}
html.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
}
html.has-js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: clamp(3rem, 7vw, 6rem);
  background: var(--deep);
  color: var(--paper);
  border-top: 2px solid var(--ink);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr 1.1fr;
  gap: clamp(1.6rem, 4vw, 3.4rem);
  padding-block: clamp(2.4rem, 5vw, 3.6rem);
}
.footer__col { min-width: 0; }
.footer__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}
.footer__tagline {
  margin-top: .5rem;
  font-size: 15px;
  color: var(--neon);
}
.footer__note {
  margin-top: .9rem;
  max-width: 30ch;
  font-size: 14px;
  line-height: 1.75;
  color: #C9DEDF;
}
.footer__group + .footer__group { margin-top: 1.4rem; }
.footer__head {
  margin-bottom: .7rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--neon);
}
.footer__list {
  display: grid;
  gap: .45rem;
}
.footer__list a {
  display: inline-block;
  padding-bottom: 1px;
  font-size: 15px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.footer__list a:hover { color: var(--neon); border-bottom-color: var(--neon); }
.footer__list--meta li {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .02em;
  color: #DDE9EA;
  word-break: break-word;
}
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.5rem;
  padding-block: 1.1rem;
  border-top: 1px solid rgba(252, 252, 250, .22);
}
.footer__legal {
  font-size: 13px;
  color: #B9D2D4;
}

/* ---------- 回到顶部 ---------- */
.to-top {
  display: none;
  align-items: center;
  gap: .4rem;
  padding: .6rem .8rem;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 0;
  box-shadow: var(--hard-shadow-sm);
  cursor: pointer;
  transition: box-shadow .16s var(--ease), transform .16s var(--ease);
}
.to-top.is-visible { display: inline-flex; }
.to-top:hover { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }
.to-top__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
}
@media (min-width: 1081px) {
  .to-top {
    position: fixed;
    right: clamp(.9rem, 3vw, 1.6rem);
    bottom: clamp(.9rem, 3vw, 1.6rem);
    z-index: 90;
  }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .cmdbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand actions"
      "nav nav";
    column-gap: .8rem;
    row-gap: 0;
  }
  .navtoggle { display: inline-flex; }
  .cmdbar__cta { display: none; }

  .cmdnav { display: none; }
  .cmdnav[data-open] {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: .85rem 0 1.05rem;
    border-top: 2px solid var(--ink);
  }
  .cmdnav[data-open] .cmdnav__list {
    flex-direction: row;
    gap: .4rem;
    overflow-x: auto;
    padding-bottom: .45rem;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }
  .cmdnav[data-open] .cmdnav__link {
    padding: .5rem .75rem;
    border: 1px solid var(--ink);
    border-bottom-width: 1px;
    background: var(--paper);
    scroll-snap-align: center;
    font-size: 14px;
  }
  .cmdnav[data-open] .cmdnav__link:hover { background: var(--jiang-light); }
  .cmdnav[data-open] .cmdnav__link[aria-current="page"] {
    background: var(--jiang-light);
    border-bottom-color: var(--orange);
  }
  .cmdnav__cta {
    display: inline-flex;
    align-self: flex-start;
    margin-top: .7rem;
  }

  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__col--brand { grid-column: span 2; }
}

@media (max-width: 900px) {
  .g-2, .g-3, .g-4, .g-5, .g-6, .g-7, .g-8, .g-9 { grid-column: span 12; }
  .rail {
    border-right: 0;
    padding-right: 0;
    border-bottom: var(--hair);
    padding-bottom: 1.2rem;
  }
  .media { box-shadow: 4px 4px 0 var(--ink); }
  .card { box-shadow: 4px 4px 0 var(--ink); }
  .timeline--x { grid-auto-columns: minmax(78%, 1fr); }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; line-height: 1.8; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__col--brand { grid-column: span 1; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .brand__mark { width: 30px; height: 30px; }
  .brand__name { font-size: 1rem; }
}

/* ============================================================
   降低动效
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.has-js [data-reveal] { opacity: 1; transform: none; }
  .card:hover, .btn:hover, .to-top:hover { transform: none; }
}