/* ============================================================
   AB娱乐中心 · 共享站点样式 /assets/site.css
   深墨蓝工作台 · 双层仪表导航 · 荧光青 + 暖琥珀双强调
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--bar-h, 64px) + 16px);
}

body, h1, h2, h3, h4, h5, p, ul, ol, li, dl, dd, figure, blockquote, address { margin: 0; }
ul, ol { padding: 0; }
ul[class], ol[class] { list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
address { font-style: normal; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: var(--cyan-200); text-decoration: none; }
table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #060F18;
  --ink-800: #0B1B2B;
  --panel-700: #10263A;
  --line-600: #17334B;
  --cyan-400: #2BE3C9;
  --cyan-200: #9BF6EA;
  --amber-400: #F5A93F;
  --amber-200: #FFD79A;
  --paper-050: #E9F0F6;
  --slate-400: #8FA3B8;
  --teal-800: #0F3D3E;
  --teal-line: #1B5B57;
  --wine-800: #4E1B2E;
  --wine-line: #6E2740;

  --font-display: "Barlow Semi Condensed", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", Menlo, Consolas, "Courier New", monospace;

  --bar-h: 64px;
  --rail-w: 224px;
  --rail-pad: 0px;
  --shell: 1280px;
  --gap: clamp(16px, 2.4vw, 28px);
  --pad-x: clamp(16px, 4vw, 48px);
  --shadow-hard: 0 6px 0 var(--line-600);
  --line: 1px solid var(--line-600);
  --line-thick: 2px solid var(--line-600);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-800);
  background-image:
    repeating-linear-gradient(90deg, rgba(23, 51, 75, 0.38) 0 1px, transparent 1px 104px),
    repeating-linear-gradient(0deg, rgba(23, 51, 75, 0.22) 0 1px, transparent 1px 104px);
  color: var(--paper-050);
  font-family: var(--font-body);
  font-size: clamp(16px, 0.55vw + 14.4px, 18px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.08em;
}

h1 { font-size: clamp(28px, 4.2vw, 64px); }
h2 { font-size: clamp(24px, 2.8vw, 40px); }
h3 { font-size: clamp(18px, 1.7vw, 24px); letter-spacing: 0.06em; }
h4 { font-size: clamp(16px, 1.3vw, 19px); letter-spacing: 0.05em; }

p { max-width: 74ch; }
main p a, main li a, main dd a {
  text-decoration: underline;
  text-decoration-color: rgba(43, 227, 201, 0.55);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

::selection { background: var(--cyan-400); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--slate-400);
  line-height: 1.6;
}

.section-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 64px);
  line-height: 0.9;
  color: var(--cyan-400);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.rule {
  height: 0;
  border: 0;
  border-top: var(--line);
  margin-block: clamp(20px, 3vw, 36px);
}

/* ---------- 4. 外壳与版心 ---------- */
main, .site-footer { padding-left: var(--rail-pad); }

.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  display: inline-block;
  padding: 10px 16px;
  background: var(--cyan-400);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  border: 2px solid var(--ink-900);
  box-shadow: 0 4px 0 var(--ink-900);
  transition: top 0.16s ease;
}
.skip-link:focus { top: 10px; }

.site-header__bar {
  background: var(--ink-900);
  border-bottom: 2px solid var(--line-600);
  box-shadow: 0 5px 0 rgba(6, 15, 24, 0.55);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--bar-h);
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding: 9px clamp(14px, 2.6vw, 32px);
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 1 auto;
  min-width: 0;
  color: var(--paper-050);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }

.brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border: 2px solid var(--cyan-400);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  box-shadow: 3px 3px 0 rgba(43, 227, 201, 0.28);
  transition: box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.brand:hover .brand__mark {
  background: var(--cyan-400);
  color: var(--ink-900);
  box-shadow: 3px 3px 0 rgba(43, 227, 201, 0.55);
}

.brand__text { display: block; min-width: 0; }

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 1.6vw, 21px);
  letter-spacing: 0.16em;
  line-height: 1.15;
  white-space: nowrap;
}

.brand__sub {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--slate-400);
  white-space: nowrap;
}

/* 状态标签 */
.site-header__meta {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 3px 9px;
  border: 1px solid var(--line-600);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.7;
  color: var(--slate-400);
  background: rgba(43, 227, 201, 0.04);
  white-space: nowrap;
}
.tag b {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
}
.tag--version {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-900);
}
.tag--stamp {
  background: transparent;
  border-color: rgba(245, 169, 63, 0.55);
  color: var(--amber-400);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 7px 12px;
  background: var(--panel-700);
  border: 2px solid var(--line-600);
  color: var(--paper-050);
  cursor: pointer;
  box-shadow: 0 3px 0 var(--ink-900);
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.nav-toggle:hover { border-color: var(--cyan-400); }
.nav-toggle__box { display: block; width: 14px; }
.nav-toggle__bar {
  display: block;
  width: 14px;
  height: 2px;
  background: currentColor;
  transition: transform 0.18s ease;
}
.nav-toggle__bar + .nav-toggle__bar { margin-top: 4px; }
.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.site-header[data-open] .nav-toggle {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-900);
}
.site-header[data-open] .nav-toggle__bar:first-child { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bar:last-child { transform: translateY(-3px) rotate(-45deg); }

/* 栏目索引（移动：横向条带） */
.site-nav {
  display: none;
  background: var(--ink-900);
  border-top: 1px solid var(--line-600);
  border-bottom: 2px solid var(--line-600);
  max-height: min(68vh, 520px);
  overflow-y: auto;
  padding: 12px 14px 14px;
  -webkit-overflow-scrolling: touch;
}
.site-header[data-open] .site-nav { display: block; }

.site-nav__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--slate-400);
  margin-bottom: 10px;
}

.site-nav__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}
.site-nav__item { flex: 0 0 auto; scroll-snap-align: start; }

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-600);
  background: var(--panel-700);
  color: var(--paper-050);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible {
  text-decoration: none;
  border-color: var(--cyan-400);
  color: var(--cyan-200);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
}
.site-nav__text { display: inline; }

.site-nav__link[aria-current="page"] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-900);
  font-weight: 600;
}
.site-nav__link[aria-current="page"] .site-nav__num { color: var(--ink-900); }

/* 阅读进度 */
.site-nav__meter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-600);
}
.site-nav__meter-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--slate-400);
}
.site-nav__meter-value {
  margin-left: auto;
  padding: 1px 7px;
  border: 1px solid var(--line-600);
  background: rgba(43, 227, 201, 0.1);
  color: var(--cyan-200);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}
.site-nav__meter-track {
  display: block;
  flex: 1 0 100%;
  height: 4px;
  background: var(--line-600);
}
.site-nav__meter-fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--cyan-400);
  transition: width 0.18s linear;
}

/* 桌面：竖排索引轨道 */
@media (min-width: 1024px) {
  :root { --rail-pad: var(--rail-w); }

  .site-nav {
    position: fixed;
    left: 0;
    top: var(--bar-h);
    bottom: 0;
    width: var(--rail-w);
    display: flex;
    flex-direction: column;
    max-height: none;
    overflow-y: auto;
    padding: 24px 16px 18px;
    border-top: 0;
    border-bottom: 0;
    border-right: 1px solid var(--line-600);
  }
  .site-header[data-open] .site-nav { display: flex; }

  .site-nav__label {
    padding-left: 10px;
    margin-bottom: 14px;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .site-nav__item { flex: 0 0 auto; }

  .site-nav__link {
    padding: 9px 10px;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    font-size: 15px;
    white-space: normal;
  }
  .site-nav__link:hover {
    background: var(--panel-700);
    border-left-color: var(--cyan-200);
    color: var(--paper-050);
  }
  .site-nav__link[aria-current="page"] {
    background: var(--panel-700);
    border-left: 2px solid var(--cyan-400);
    color: var(--paper-050);
    font-weight: 600;
  }
  .site-nav__link[aria-current="page"] .site-nav__num { color: var(--cyan-400); }

  .site-nav__meter { margin-top: auto; padding-top: 14px; }

  .nav-toggle { display: none; }
}

@media (min-width: 760px) {
  .site-header__meta { display: flex; }
}

@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }
}

@media (max-width: 520px) {
  .brand__sub { display: none; }
  .brand__mark { width: 34px; height: 34px; }
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  background: var(--ink-900);
  border-top: 2px solid var(--line-600);
  color: var(--paper-050);
  margin-top: clamp(40px, 6vw, 88px);
}

.site-footer__inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(30px, 4.6vw, 60px) var(--pad-x) 22px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  padding-bottom: clamp(24px, 3vw, 40px);
  border-bottom: 1px solid var(--line-600);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: 0.18em;
  line-height: 1.2;
}
.footer-brand__note {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--slate-400);
}
.footer-stamp { margin-top: 14px; }

.footer-update {
  margin-top: 12px;
  max-width: 38ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}
.footer-update b {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--amber-400);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 34px);
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan-400);
  margin-bottom: 12px;
}

.footer-list li + li { margin-top: 7px; }

.footer-link {
  display: inline-block;
  color: var(--paper-050);
  font-size: 15px;
  line-height: 1.6;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.footer-link:hover,
.footer-link:focus-visible {
  text-decoration: none;
  color: var(--cyan-200);
  border-bottom-color: var(--cyan-400);
}

.footer-contact {
  font-size: 14px;
  line-height: 1.9;
  color: var(--slate-400);
}
.footer-contact b {
  display: block;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--paper-050);
  word-break: break-all;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
  padding-top: 20px;
}

.footer-legal {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.8;
  color: var(--slate-400);
  max-width: none;
}
.footer-copy {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate-400);
}

@media (min-width: 620px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .site-footer__top { grid-template-columns: minmax(240px, 0.9fr) minmax(0, 2fr); }
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 7. 通用组件 ---------- */
/* 面板 */
.panel {
  position: relative;
  background: var(--panel-700);
  border: var(--line-thick);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 2.4vw, 30px);
}
.panel--teal {
  background: var(--teal-800);
  border-color: var(--teal-line);
  box-shadow: 0 6px 0 rgba(27, 91, 87, 0.45);
}
.panel--wine {
  background: var(--wine-800);
  border-color: var(--wine-line);
  box-shadow: 0 6px 0 rgba(110, 39, 64, 0.45);
}
.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 10px 14px;
  margin-bottom: 14px;
}
.panel__title {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.8vw, 25px);
  letter-spacing: 0.08em;
  line-height: 1.25;
}
.panel__body { font-size: 15.5px; }
.panel__body > * + * { margin-top: 12px; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 20px;
  border: 2px solid var(--cyan-400);
  background: transparent;
  color: var(--paper-050);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-decoration: none;
  box-shadow: 0 4px 0 rgba(6, 15, 24, 0.7);
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  transform: translateY(-2px);
}
.btn--primary {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-900);
}
.btn--primary:hover { background: var(--cyan-200); border-color: var(--cyan-200); }
.btn--amber {
  border-color: var(--amber-400);
  color: var(--amber-200);
}
.btn--amber:hover { background: rgba(245, 169, 63, 0.14); }
.btn--ghost {
  border-color: var(--line-600);
  color: var(--paper-050);
}
.btn--ghost:hover { border-color: var(--cyan-400); color: var(--cyan-200); }
.btn--block { display: flex; width: 100%; }

/* 面包屑 */
.breadcrumb { margin-bottom: clamp(16px, 2vw, 26px); }
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--slate-400);
}
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before {
  content: "/";
  color: var(--line-600);
}
.breadcrumb a {
  color: var(--slate-400);
  border-bottom: 1px solid transparent;
}
.breadcrumb a:hover { color: var(--cyan-200); border-bottom-color: var(--cyan-400); }
.breadcrumb [aria-current="page"] { color: var(--cyan-200); }

/* 网格 */
.grid { display: grid; gap: var(--gap); grid-template-columns: 1fr; }
@media (min-width: 720px) {
  .grid--2, .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1080px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* 图片位 */
.figure { margin: 0; }
.figure__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: var(--line-thick);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}
.figure__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(23, 51, 75, 0.85) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(0deg, rgba(23, 51, 75, 0.55) 0 1px, transparent 1px 28px);
  opacity: 0.75;
}
.figure__media--wide { aspect-ratio: 21 / 9; }
.figure__media--tall { aspect-ratio: 4 / 5; }
.figure__img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.figure__caption {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--slate-400);
}

/* 折叠组 */
.disclosure {
  border: var(--line-thick);
  background: var(--panel-700);
  box-shadow: 0 4px 0 rgba(6, 15, 24, 0.5);
}
.disclosure + .disclosure { margin-top: 12px; }
.disclosure__btn {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  text-align: left;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper-050);
  cursor: pointer;
  transition: background 0.18s ease, box-shadow 0.18s ease;
}
.disclosure__btn::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan-400);
}
.disclosure__btn[aria-expanded="true"]::after { content: "−"; }
.disclosure__btn[aria-expanded="true"] {
  box-shadow: inset 3px 0 0 var(--cyan-400);
  background: rgba(43, 227, 201, 0.07);
}
.disclosure__btn:hover { background: rgba(43, 227, 201, 0.1); }
.disclosure__panel {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line-600);
  font-size: 15px;
  color: var(--paper-050);
}
.disclosure__panel[hidden] { display: none; }
.disclosure__panel > * + * { margin-top: 10px; }

/* 提示条 */
.note {
  border-left: 3px solid var(--amber-400);
  background: rgba(245, 169, 63, 0.09);
  padding: 12px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--amber-200);
}
.note b { color: var(--amber-400); font-family: var(--font-mono); font-weight: 600; }

/* 进场显现 */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 8. 无障碍与动效偏好 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@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;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
}