/* =====================================================================
   乐虎国游戏 · 共享站点样式 /assets/site.css
   暗色终端 + 东北工业霓虹 · 虎纹橙主视觉 / 电竞青信息高亮
   ===================================================================== */

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

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

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

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

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

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

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

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

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

main { display: block; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 2. 设计令牌 ---------- */
:root {
  --ink: #0B0C0E;
  --panel: #15171B;
  --iron: #23272E;
  --iron-soft: rgba(35, 39, 46, .55);
  --orange: #FF7A18;
  --gold: #FFC24A;
  --cyan: #1FD6E8;
  --green: #4ADE80;
  --red: #FF4D6D;
  --text: #EDEFF2;
  --muted: #9BA6B4;
  --tiger: linear-gradient(120deg, #FF7A18, #FFC24A 55%, #1FD6E8);

  --font-display: "Noto Sans SC", "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SF Mono", ui-monospace, Consolas, monospace;

  --container: 1220px;
  --gap: clamp(16px, 3vw, 36px);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 20px 44px -28px rgba(0, 0, 0, .9);
  --header-bp: 960px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 420px at 10% -10%, rgba(255, 122, 24, .13), transparent 62%),
    radial-gradient(760px 380px at 92% 2%, rgba(31, 214, 232, .10), transparent 60%);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(28px, 4.4vw, 46px); font-weight: 900; letter-spacing: -.02em; }
h2 { font-size: clamp(24px, 3.4vw, 36px); }
h3 { font-size: clamp(19px, 2.2vw, 24px); }
h4 { font-size: 17px; }

p { max-width: 42em; }

strong { font-weight: 700; color: var(--text); }

code, kbd, samp, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

::selection {
  background: var(--orange);
  color: #0B0C0E;
}

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 300;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--orange);
  color: #0B0C0E;
  font-weight: 700;
  font-size: 14px;
  transition: top .18s ease;
}

.skip-link:focus {
  top: 14px;
}

/* ---------- 5. 报头 ---------- */
.site-header {
  position: relative;
  z-index: 60;
  background: rgba(11, 12, 14, .96);
  border-bottom: 1px solid var(--iron);
}

.masthead {
  position: relative;
  background: linear-gradient(180deg, rgba(21, 23, 27, .96), rgba(11, 12, 14, .72));
  border-bottom: 1px solid var(--iron);
}

.masthead::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  transform: translateX(-50%);
  width: min(340px, 62%);
  height: 2px;
  background: var(--tiger);
  opacity: .95;
}

.masthead__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px var(--gap) 18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-areas: "status brand utility";
  align-items: center;
  gap: 14px 20px;
}

.masthead__status {
  grid-area: status;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.masthead__status-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  white-space: nowrap;
}

.masthead__text { letter-spacing: .08em; }

.status-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(74, 222, 128, .16);
  animation: status-pulse 2.6s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 4px rgba(74, 222, 128, .16); }
  50% { opacity: .6; box-shadow: 0 0 0 7px rgba(74, 222, 128, .04); }
}

.masthead__icp {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--muted);
  opacity: .72;
  white-space: nowrap;
}

.masthead__brand {
  grid-area: brand;
  display: flex;
  justify-content: center;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  text-align: center;
}

.brand__mark {
  width: 58px;
  height: 7px;
  border-radius: 2px;
  background: var(--tiger);
  transform: skewX(-20deg);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 31px);
  line-height: 1;
  letter-spacing: .18em;
  text-indent: .18em;
  color: var(--text);
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .32em;
  text-indent: .32em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand--footer {
  align-items: flex-start;
  text-align: left;
}

.brand--footer .brand__mark { width: 44px; height: 6px; }
.brand--footer .brand__name { font-size: 24px; letter-spacing: .14em; text-indent: .14em; }
.brand--footer .brand__sub { letter-spacing: .22em; text-indent: .22em; }

.masthead__utility {
  grid-area: utility;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 6px 16px;
}

.util-link {
  position: relative;
  padding: 6px 0 6px 13px;
  font-size: 13px;
  color: var(--muted);
  transition: color .18s ease;
  white-space: nowrap;
}

.util-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  margin-top: -2.5px;
  background: var(--iron);
  transform: rotate(45deg);
  transition: background .18s ease;
}

.util-link:hover { color: var(--cyan); }
.util-link:hover::before { background: var(--cyan); }

/* --- 移动导航按钮 --- */
.nav-toggle {
  grid-area: toggle;
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--iron);
  border-radius: 9px;
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  transition: border-color .18s ease, color .18s ease;
}

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

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: var(--gold);
  transition: background .2s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--gold);
  transition: transform .22s ease;
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.site-header[data-open] .nav-toggle { border-color: var(--orange); }
.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

/* --- 栏目索引带 --- */
.site-nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gap);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.site-nav__item { display: flex; }

.site-nav__link {
  position: relative;
  display: block;
  padding: 13px 15px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  transition: color .18s ease;
}

.site-nav__link::before {
  content: attr(data-index);
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.4;
  letter-spacing: .16em;
  color: rgba(155, 166, 180, .48);
  transition: color .18s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 9px;
  height: 3px;
  border-radius: 2px;
  background: var(--tiger);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .22s ease;
}

.site-nav__link:hover { color: var(--text); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link:hover::before { color: var(--gold); }

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

.site-nav__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
  white-space: nowrap;
}

/* --- 滚动进度 --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  background: var(--tiger);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--panel);
  border-top: 1px solid var(--iron);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 140px;
  height: 3px;
  background: var(--tiger);
}

.footer__grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 60px) var(--gap) clamp(22px, 3vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
  gap: clamp(24px, 4vw, 56px);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer__blurb {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 34em;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer__col-title {
  position: relative;
  padding-top: 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--gold);
  text-transform: uppercase;
}

.footer__col-title::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--orange);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer__link {
  display: inline-block;
  font-size: 14px;
  color: var(--muted);
  transition: color .18s ease, transform .18s ease;
}

.footer__link:hover {
  color: var(--cyan);
  transform: translateX(3px);
}

.footer__contact {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px 28px;
  padding-top: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid var(--iron);
}

.footer__contact-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
  max-width: none;
}

.footer__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer__value {
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

.footer__note {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 60em;
}

.footer__bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px var(--gap) 30px;
  border-top: 1px solid var(--iron);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 13px;
  color: var(--muted);
}

.footer__legal { max-width: none; }

.footer__icp {
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

.footer__meta {
  font-family: var(--font-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  max-width: none;
}

/* ---------- 7. 容器与章节节奏 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gap);
}

.container--narrow { max-width: 860px; }

.section { padding-block: clamp(40px, 7vw, 88px); }
.section--tight { padding-block: clamp(24px, 4vw, 48px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 28px;
  margin-bottom: clamp(20px, 3vw, 38px);
}

.section__title { max-width: 24em; }

.section__desc {
  color: var(--muted);
  font-size: 15px;
  max-width: 52ch;
}

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

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split {
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: clamp(20px, 3.4vw, 48px);
  align-items: start;
}

.rule {
  height: 1px;
  border: 0;
  background: var(--iron);
  margin: 0;
}

.tiger-band {
  width: 86px;
  height: 6px;
  border-radius: 3px;
  background: var(--tiger);
  transform: skewX(-18deg);
}

/* ---------- 8. 展览标签 / 按钮 / 面包屑 ---------- */
.label-plate {
  display: inline-flex;
  flex-direction: column;
  gap: 1px;
  padding: 8px 13px;
  border: 1px solid var(--iron);
  border-left: 3px solid var(--orange);
  border-radius: 4px 10px 10px 4px;
  background: var(--iron-soft);
}

.label-plate__en {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
}

.label-plate__cn {
  font-size: 13px;
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}

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

.btn--primary {
  background: var(--orange);
  color: #0B0C0E;
}
.btn--primary:hover { background: var(--gold); }

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

.btn--quiet {
  padding-inline: 0;
  color: var(--cyan);
}
.btn--quiet:hover { color: var(--gold); }

.breadcrumb {
  padding-top: clamp(18px, 3vw, 28px);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb__link {
  color: var(--muted);
  transition: color .18s ease;
}
.breadcrumb__link:hover { color: var(--cyan); }

.breadcrumb__sep {
  color: var(--muted);
  opacity: .45;
}

/* ---------- 9. 面板 / 数据 / 状态 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--iron);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel--cut { border-radius: 22px 5px 22px 5px; }

.stamp {
  position: absolute;
  top: 12px;
  right: 14px;
  padding: 3px 10px;
  border: 1px solid var(--iron);
  border-radius: 999px;
  background: rgba(35, 39, 46, .72);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.8vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--gold);
}

.stat__label {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--iron);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  background: var(--iron-soft);
}

.chip--ok { color: var(--green); border-color: rgba(74, 222, 128, .42); }
.chip--warn { color: var(--red); border-color: rgba(255, 77, 109, .42); }
.chip--info { color: var(--cyan); border-color: rgba(31, 214, 232, .42); }

.data-table {
  font-size: 14px;
  text-align: left;
}

.data-table th {
  padding: 10px 12px;
  background: var(--iron);
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.data-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--iron);
  color: var(--text);
  vertical-align: top;
}

.data-table tbody tr:nth-child(even) { background: rgba(35, 39, 46, .34); }

.data-table td.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 10. 可展开内容组 ---------- */
.disclosure {
  border: 1px solid var(--iron);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.disclosure + .disclosure { margin-top: 10px; }

.disclosure__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  transition: color .18s ease, background .18s ease;
}

.disclosure__trigger:hover { color: var(--gold); background: rgba(35, 39, 46, .4); }

.disclosure__sign {
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--orange);
  transition: transform .22s ease;
}

.disclosure[data-open] .disclosure__sign { transform: rotate(45deg); }

.disclosure__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .28s ease;
}

.disclosure[data-open] .disclosure__panel { grid-template-rows: 1fr; }

.disclosure__body {
  overflow: hidden;
  padding: 0 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.disclosure[data-open] .disclosure__body { padding-bottom: 18px; }

.disclosure__body > * + * { margin-top: 12px; }

/* ---------- 11. 图片容器 ---------- */
.media {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--iron);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, #191C22 0%, #0E1013 100%);
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: repeating-linear-gradient(135deg, rgba(255, 122, 24, .07) 0 10px, transparent 10px 22px);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(255, 122, 24, .16), transparent 48%, rgba(31, 214, 232, .14));
  mix-blend-mode: screen;
}

.media__img {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06) brightness(.92);
}

.media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  padding: 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text);
  background: linear-gradient(0deg, rgba(11, 12, 14, .94), rgba(11, 12, 14, 0));
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }
.media--slash { border-radius: 22px 4px 22px 4px; }

/* ---------- 12. 滚动显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1099px) {
  .brand__name { letter-spacing: .14em; text-indent: .14em; }
  .site-nav__link { padding-inline: 12px; font-size: 14px; }
  .site-nav__link::after { left: 12px; right: 12px; }
}

@media (max-width: 960px) {
  .masthead__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "status toggle"
      "brand brand"
      "utility utility";
    justify-items: center;
    gap: 12px;
    padding: 14px var(--gap) 16px;
  }

  .masthead__status {
    justify-self: start;
    align-items: flex-start;
  }

  .masthead__utility { justify-content: center; }
  .nav-toggle { display: inline-flex; justify-self: end; }

  .site-nav {
    display: block;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    padding: 0 var(--gap);
    border-top: 1px solid transparent;
    transition: max-height .32s ease, opacity .22s ease, visibility .22s ease;
  }

  .site-header[data-open] .site-nav {
    max-height: min(74vh, 560px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
    padding-bottom: 14px;
    border-top-color: var(--iron);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
  }

  .site-nav__item { border-bottom: 1px solid var(--iron); }

  .site-nav__link {
    padding: 14px 2px 16px;
    font-size: 16px;
  }

  .site-nav__link::after {
    left: 0;
    right: auto;
    width: 36px;
    bottom: 10px;
  }

  .site-nav__meta { padding: 14px 0 0; }

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

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--split { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .masthead__icp { display: none; }
  .nav-toggle__text { display: none; }
  .footer__cols { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .brand--footer .brand__name { font-size: 21px; }
}

/* ---------- 14. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }

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