/* ==========================================================================
   电玩城棋牌 — 全站共享样式表 /assets/site.css
   夜间电玩城霓虹 + 粗野主义边框 + 目录型内容地图
   ========================================================================== */

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

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

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

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

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

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

a { color: inherit; }

table { border-collapse: collapse; }

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 夜间底色 */
  --night-950: #05060B;
  --night-900: #0B0E18;
  --night-800: #141826;

  /* 霓虹强调 */
  --neon-violet: #8B5CF6;
  --neon-cyan: #22D3EE;
  --candy-pink: #F472B6;
  --glow-lime: #A3E635;
  --tag-amber: #FBBF24;

  /* 文字与线条 */
  --mist-100: #E7E9F2;
  --mist-400: #9AA3B8;
  --line-steel: #2A3040;
  --ember-red: #FB7185;

  /* 字体栈（全部本地，不加载远程资源） */
  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", SimSun, Georgia, serif;
  --font-label: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 结构与节奏 */
  --bd: 2px solid var(--line-steel);
  --radius: 2px;
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, 0.55);
  --shadow-neon: 0 0 0 1px rgba(139, 92, 246, 0.35), 0 0 22px rgba(139, 92, 246, 0.34);
  --wrap: 1440px;
  --gutter: clamp(16px, 3.4vw, 44px);
  --ease: cubic-bezier(0.2, 0.75, 0.3, 1);
  --dur: 0.22s;
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  background-color: var(--night-950);
  background-image:
    radial-gradient(1100px 620px at 88% -6%, rgba(139, 92, 246, 0.16), transparent 62%),
    radial-gradient(880px 520px at 4% 8%, rgba(34, 211, 238, 0.10), transparent 60%),
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 4px);
  color: var(--mist-100);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

p, li, dd, dt { text-wrap: pretty; }

h1, h2, h3, h4 {
  line-height: 1.2;
  text-wrap: balance;
  font-weight: 700;
}

h1 { font-family: var(--font-display); font-size: clamp(30px, 4.4vw, 52px); }
h2 { font-family: var(--font-display); font-size: clamp(24px, 3vw, 38px); }
h3 { font-family: var(--font-label); font-weight: 900; font-size: clamp(18px, 2vw, 22px); }
h4 { font-family: var(--font-label); font-weight: 900; font-size: 17px; }

::selection {
  background: var(--neon-violet);
  color: #07030F;
}

/* ---------- 4. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 6vw, 88px); }
.section--tight { padding-block: clamp(24px, 3.4vw, 48px); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(18px, 2.2vw, 30px);
}

.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-6  { grid-column: span 6; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.stack > * + * { margin-top: 1rem; }

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: absolute;
  left: 14px;
  top: -90px;
  z-index: 200;
  padding: 12px 20px;
  font-family: var(--font-label);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: #04121A;
  background: var(--neon-cyan);
  border: 2px solid #04121A;
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.6);
  transition: top var(--dur) var(--ease);
}

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

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--night-950);
  border-bottom: var(--bd);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.site-header.is-condensed {
  background: var(--night-900);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.6);
}

.header-rail {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 15px var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 34px);
  transition: padding var(--dur) var(--ease);
}

.site-header.is-condensed .header-rail { padding-block: 9px; }

/* 品牌签条 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  color: inherit;
}

.brand__mark {
  flex: none;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  font-family: var(--font-label);
  font-weight: 900;
  font-size: 24px;
  line-height: 1;
  color: var(--neon-cyan);
  background: linear-gradient(158deg, rgba(139, 92, 246, 0.24), rgba(34, 211, 238, 0.08));
  border: 2px solid var(--neon-violet);
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 rgba(139, 92, 246, 0.3), inset 0 0 16px rgba(139, 92, 246, 0.35);
  text-shadow: 0 0 10px rgba(34, 211, 238, 0.9);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-label);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.05em;
  color: var(--mist-100);
}

.brand__domain {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--mist-400);
  white-space: nowrap;
}

/* 中间的霓虹分隔带 */
.header-scan {
  flex: 1 1 48px;
  min-width: 16px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-violet) 22%, var(--neon-cyan) 62%, transparent);
  opacity: 0.6;
}

/* 主导航 */
.site-nav { margin-left: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item { position: relative; }

.site-nav__item > a {
  display: block;
  padding: 10px 15px;
  font-family: var(--font-label);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--mist-400);
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.site-nav__item > a:hover {
  color: var(--mist-100);
  background: var(--night-800);
  border-color: var(--line-steel);
}

.site-nav__item > a[aria-current="page"] {
  color: #04121A;
  background: var(--neon-cyan);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 0 2px rgba(34, 211, 238, 0.22), 0 0 20px rgba(34, 211, 238, 0.5);
  text-shadow: none;
}

/* 移动端目录按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 10px 14px;
  background: var(--night-800);
  border: 2px solid var(--neon-violet);
  border-radius: var(--radius);
  color: var(--mist-100);
  font-family: var(--font-label);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.06em;
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(139, 92, 246, 0.28);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.nav-toggle:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 rgba(139, 92, 246, 0.42); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.8);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.8);
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease),
              opacity var(--dur) var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after  { top: 6px; }

.nav-toggle.is-active .nav-toggle__bars { background: transparent; box-shadow: none; }
.nav-toggle.is-active .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle.is-active .nav-toggle__bars::after  { top: 0; transform: rotate(-45deg); }

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

/* 阅读进度条 */
.scroll-progress {
  height: 3px;
  background: var(--night-800);
  overflow: hidden;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--neon-violet), var(--neon-cyan) 48%, var(--candy-pink));
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.85);
  will-change: transform;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 110px);
  background: var(--night-900);
  border-top: var(--bd);
}

.footer-inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 68px) var(--gutter) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1.25fr;
  gap: clamp(24px, 3vw, 52px);
  align-items: start;
}

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

.brand--footer .brand__mark { width: 40px; height: 40px; font-size: 20px; }
.brand--footer .brand__name { font-size: 17px; }

.footer-tagline {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist-400);
}

.footer-title {
  margin-bottom: 16px;
  padding-bottom: 10px;
  font-family: var(--font-label);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--neon-cyan);
  border-bottom: var(--bd);
}

.footer-links {
  display: grid;
  gap: 2px;
}

.footer-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 15px;
  color: var(--mist-400);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.footer-links a::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--neon-violet);
  box-shadow: 0 0 8px rgba(139, 92, 246, 0.9);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--mist-100);
  padding-left: 6px;
}

.footer-links a:hover::before,
.footer-links a:focus-visible::before {
  background: var(--neon-cyan);
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.95);
}

.footer-note {
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-400);
}

.contact-list { display: grid; gap: 14px; }

.contact-list__row { display: grid; gap: 3px; }

.contact-list dt {
  font-family: var(--font-label);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon-cyan);
}

.contact-list dd {
  font-size: 15px;
  line-height: 1.65;
  color: var(--mist-100);
  overflow-wrap: anywhere;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 26px;
  margin-top: clamp(28px, 4vw, 52px);
  padding-block: 20px;
  border-top: 1px solid var(--line-steel);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--mist-400);
}

.footer-neon {
  height: 6px;
  background: linear-gradient(90deg, var(--neon-violet), var(--neon-cyan) 34%, var(--candy-pink) 62%, var(--tag-amber) 82%, var(--glow-lime));
  box-shadow: 0 0 28px rgba(139, 92, 246, 0.55);
}

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 24px;
  font-family: var(--font-label);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-align: center;
  color: var(--mist-100);
  background: transparent;
  border: 2px solid var(--neon-violet);
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.btn:hover {
  transform: translate(-2px, -2px);
  background: rgba(139, 92, 246, 0.16);
  box-shadow: 4px 4px 0 rgba(139, 92, 246, 0.5);
}

.btn--solid {
  color: #0B0416;
  background: var(--neon-violet);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55);
}

.btn--solid:hover {
  color: #04121A;
  background: var(--neon-cyan);
  border-color: var(--neon-cyan);
  box-shadow: 4px 4px 0 rgba(34, 211, 238, 0.35);
}

.btn--lime {
  color: var(--glow-lime);
  border-color: var(--glow-lime);
}

.btn--lime:hover {
  background: rgba(163, 230, 53, 0.14);
  box-shadow: 4px 4px 0 rgba(163, 230, 53, 0.35);
}

.btn--wide { width: 100%; }

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  padding-block: 14px;
  font-size: 14px;
  color: var(--mist-400);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  font-family: var(--font-mono);
  color: var(--line-steel);
}

.breadcrumb a {
  color: var(--mist-400);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.breadcrumb a:hover { color: var(--neon-cyan); }

.breadcrumb [aria-current="page"] { color: var(--mist-100); }

/* ---------- 10. 正文排版 ---------- */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist-100);
}

.prose h2 {
  margin-block: 1.7em 0.6em;
  font-family: var(--font-display);
  font-size: clamp(24px, 2.9vw, 34px);
}

.prose h3 {
  margin-block: 1.5em 0.5em;
  font-family: var(--font-label);
  font-weight: 900;
  font-size: clamp(18px, 2vw, 21px);
}

.prose p { margin-block: 0 1.15em; color: var(--mist-100); }

.prose ul,
.prose ol {
  margin-block: 0 1.3em;
  display: grid;
  gap: 0.55em;
}

.prose ul > li {
  position: relative;
  padding-left: 24px;
  color: var(--mist-100);
}

.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--neon-cyan);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.9);
}

.prose ol { list-style: decimal; padding-left: 1.4em; }
.prose ol > li::marker { color: var(--neon-violet); font-family: var(--font-mono); }

.prose a {
  color: var(--neon-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.prose a:hover { color: var(--candy-pink); }

.prose strong { color: var(--glow-lime); font-weight: 700; }

.prose blockquote {
  margin-block: 0 1.3em;
  padding: 14px 20px;
  border-left: 4px solid var(--neon-violet);
  background: var(--night-800);
  color: var(--mist-400);
}

/* ---------- 11. 展签 / 面板 / 标签 ---------- */
.plate {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-label);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--neon-violet);
}

.plate::before {
  content: attr(data-index);
  display: grid;
  place-items: center;
  min-width: 30px;
  height: 24px;
  padding-inline: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--night-950);
  background: var(--neon-violet);
  border-radius: var(--radius);
  box-shadow: 0 0 14px rgba(139, 92, 246, 0.6);
}

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--night-800);
  border: var(--bd);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.panel--neon {
  border-color: var(--neon-violet);
  box-shadow: var(--shadow-hard), var(--shadow-neon);
}

.panel--float { transform: translate(-4px, -4px); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  font-family: var(--font-label);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--candy-pink);
  border: 1px solid currentColor;
  border-radius: var(--radius);
}

.chip--lime  { color: var(--glow-lime); }
.chip--amber { color: var(--tag-amber); }
.chip--cyan  { color: var(--neon-cyan); }

.num,
.is-num {
  font-family: var(--font-mono);
  font-size: 1.06em;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--glow-lime);
}

.is-num { color: inherit; }

.stripe {
  height: 12px;
  border-block: var(--bd);
  background:
    linear-gradient(90deg, var(--neon-violet), var(--neon-cyan)) left / 38% 100% no-repeat,
    repeating-linear-gradient(135deg, var(--line-steel) 0 8px, transparent 8px 16px);
}

/* ---------- 12. 目录型内容地图 ---------- */
.index-map {
  display: grid;
  gap: 10px;
}

.index-map__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  text-decoration: none;
  color: var(--mist-100);
  background: var(--night-800);
  border: var(--bd);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.index-map__item:hover {
  transform: translateX(6px);
  border-color: var(--neon-violet);
  background: var(--night-900);
  box-shadow: var(--shadow-neon);
}

.index-map__no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--neon-violet);
}

.index-map__label {
  font-family: var(--font-label);
  font-weight: 900;
  font-size: 18px;
}

.index-map__desc {
  display: block;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--mist-400);
}

.index-map__arrow {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--neon-cyan);
}

/* ---------- 13. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--night-800);
  border: var(--bd);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  isolation: isolate;
}

.media > img,
.media > picture,
.media > svg,
.media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media > picture > img { width: 100%; height: 100%; object-fit: cover; }

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 4px),
    linear-gradient(180deg, rgba(139, 92, 246, 0.14), transparent 58%);
  mix-blend-mode: screen;
}

.media--wide     { aspect-ratio: 16 / 9; }
.media--standard { aspect-ratio: 4 / 3; }
.media--tall     { aspect-ratio: 3 / 4; }
.media--square   { aspect-ratio: 1 / 1; }
.media--free     { aspect-ratio: auto; box-shadow: none; }

.media__caption {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-400);
}

.media__caption::before {
  content: "//";
  font-family: var(--font-mono);
  color: var(--neon-violet);
}

/* ---------- 14. 回到顶部（可选） ---------- */
.to-top {
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  bottom: clamp(14px, 2vw, 28px);
  z-index: 70;
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--mist-100);
  background: var(--night-800);
  border: 2px solid var(--neon-violet);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.6);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
              visibility var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--night-900); box-shadow: 4px 4px 0 rgba(139, 92, 246, 0.45); }

/* ---------- 15. 显现动效 ---------- */
[data-reveal] { transition: opacity 0.3s var(--ease), transform 0.3s var(--ease); }

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}

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

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1180px) {
  .site-nav__item > a { padding: 9px 11px; font-size: 14px; }
  .brand__domain { display: none; }
}

@media (max-width: 1000px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .site-header {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .header-scan { display: none; }

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

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    width: min(340px, 86vw);
    margin: 0;
    padding: calc(84px + env(safe-area-inset-top, 0px)) 20px 34px;
    background: var(--night-900);
    border-left: 2px solid var(--neon-violet);
    box-shadow: -18px 0 48px rgba(0, 0, 0, 0.72);
    overflow-y: auto;
    transform: translateX(103%);
    transition: transform 0.26s var(--ease);
  }

  .site-nav[data-open="true"] { transform: translateX(0); }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .site-nav__item > a {
    padding: 14px 16px;
    font-size: 18px;
    color: var(--mist-100);
    background: var(--night-800);
    border-color: var(--line-steel);
  }

  .site-nav__item > a[aria-current="page"] {
    background: var(--neon-cyan);
    color: #04121A;
    border-color: var(--neon-cyan);
  }

  .col-3, .col-4, .col-6, .col-8, .col-9 { grid-column: span 12; }

  .index-map__item { grid-template-columns: auto 1fr; }
  .index-map__arrow { display: none; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

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

  .footer-title { margin-bottom: 12px; }

  .brand__mark { width: 40px; height: 40px; font-size: 21px; }
  .brand__name { font-size: 17px; }

  .header-rail { gap: 12px; padding-block: 12px; }

  .footer-legal { font-size: 12px; gap: 6px 18px; }
}

/* ---------- 17. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }

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

  .site-nav { transition: none !important; }
  .scroll-progress__bar { transition: none !important; }
}