/* ============================================================
   问鼎娱乐 · PG 中国官网 — 共享站点样式 /assets/site.css
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 118px;
}

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

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

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

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

a { color: inherit; }

/* ---------- tokens ---------- */
:root {
  --ink: #070C0B;
  --rock: #101A17;
  --bronze: #1F6F5C;
  --jade: #3FB68C;
  --gold: #C8A24A;
  --gold-lite: #E6CE8F;
  --cinnabar: #C8402F;
  --white: #E9F1EC;
  --mute: #93A8A0;
  --line: #1E2C28;

  --wrap: 1400px;
  --rail: 288px;
  --gut: 32px;

  --f-head: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --f-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --f-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- base ---------- */
html { background: var(--ink); }

body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 70% at 12% -8%, rgba(31, 111, 92, .22) 0%, rgba(7, 12, 11, 0) 58%),
    radial-gradient(90% 60% at 100% 8%, rgba(200, 162, 74, .10) 0%, rgba(7, 12, 11, 0) 62%),
    linear-gradient(to right, rgba(30, 44, 40, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 44, 40, .55) 1px, transparent 1px);
  background-size: auto, auto, 88px 88px, 88px 88px;
  background-attachment: fixed, fixed, scroll, scroll;
  color: var(--white);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .012em;
  font-weight: 400;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--f-head);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.16;
  color: var(--white);
}

h1 { font-size: clamp(2.25rem, 5.2vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 1.9vw, 1.6rem); letter-spacing: -.01em; }
h4 { font-size: 1.0625rem; letter-spacing: 0; }

p { font-size: 1rem; }

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

::selection { background: var(--bronze); color: var(--white); }

:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 2px;
  border-radius: 0;
}

/* ---------- utilities ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gut);
  padding-right: var(--gut);
}

.mono { font-family: var(--f-mono); letter-spacing: .02em; }
.muted { color: var(--mute); }

.section { padding: 72px 0; }

.divider {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 40px 0;
}

.stack > * + * { margin-top: 18px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--jade);
}

.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: currentColor;
}

.skew-tag {
  display: inline-block;
  transform: rotate(-3deg);
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  line-height: 1.5;
  padding: 5px 12px;
  background: var(--bronze);
  color: var(--white);
  transition: transform .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}

.skew-tag:hover {
  transform: rotate(-3deg) translateX(4px);
  background: var(--cinnabar);
  color: #fff;
}

.skew-tag.is-gold { background: rgba(200, 162, 74, .18); color: var(--gold-lite); border: 1px solid rgba(200, 162, 74, .45); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  font-family: var(--f-head);
  font-weight: 700;
  font-size: 14.5px;
  letter-spacing: .03em;
  padding: 13px 24px;
  text-decoration: none;
  border: 1px solid transparent;
  background-color: transparent;
  color: var(--white);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease), background-position .6s var(--ease);
}

.btn-primary {
  background-color: var(--cinnabar);
  background-image: linear-gradient(115deg, rgba(255, 255, 255, 0) 35%, rgba(230, 206, 143, .62) 50%, rgba(255, 255, 255, 0) 65%);
  background-size: 220% 100%;
  background-position: 130% 0;
  background-repeat: no-repeat;
  color: #fff;
  border-color: var(--cinnabar);
}

.btn-primary:hover { background-position: -30% 0; background-color: #d24a37; }

.btn-ghost {
  border-color: var(--line);
  color: var(--white);
  background-color: rgba(16, 26, 23, .5);
}

.btn-ghost:hover { border-color: var(--jade); color: var(--jade); }

.btn-sm { padding: 9px 16px; font-size: 13px; }

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -72px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--jade);
  color: var(--ink);
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 14px;
  text-decoration: none;
  transition: top .2s var(--ease);
}

.skip-link:focus { top: 12px; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: #080E0D;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(31, 111, 92, .18), 0 14px 34px -28px rgba(0, 0, 0, .9);
}

.header-frame {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 15px var(--gut) 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.header-rail {
  display: flex;
  align-items: center;
  gap: 20px;
  min-width: 0;
}

/* brand */
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1;
  color: #08110E;
  background-image: linear-gradient(135deg, var(--gold-lite) 0%, var(--gold) 34%, var(--bronze) 100%);
  border: 1px solid rgba(230, 206, 143, .4);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  box-shadow: inset 0 0 0 1px rgba(7, 12, 11, .35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.brand-line {
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 15.5px;
  letter-spacing: .01em;
  color: var(--white);
  white-space: nowrap;
}

.brand-sub {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mute);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* version badge */
.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  padding: 6px 13px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-lite);
  border: 1px solid rgba(200, 162, 74, .42);
  background: rgba(200, 162, 74, .08);
  white-space: nowrap;
}

.version-dot {
  width: 6px;
  height: 6px;
  background: var(--jade);
  box-shadow: 0 0 0 0 rgba(63, 182, 140, .55);
  animation: vd-pulse 2.6s ease-out infinite;
}

@keyframes vd-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(63, 182, 140, .55); }
  70%  { box-shadow: 0 0 0 7px rgba(63, 182, 140, 0); }
  100% { box-shadow: 0 0 0 0 rgba(63, 182, 140, 0); }
}

/* nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  background: rgba(16, 26, 23, .8);
  border: 1px solid var(--line);
  color: var(--white);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

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

.nav-toggle-bars {
  position: relative;
  width: 16px;
  height: 11px;
  flex: 0 0 auto;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: transform .2s var(--ease), top .2s var(--ease), bottom .2s var(--ease);
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }

.site-header[data-open] .nav-toggle-bars::before { top: 4.5px; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle-bars::after { bottom: 4.5px; transform: rotate(-45deg); }
.site-header[data-open] .nav-toggle { border-color: var(--cinnabar); color: var(--gold-lite); }

/* nav */
.site-nav {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gut);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
}

.nav-track {
  display: flex;
  align-items: center;
  gap: 2px;
  min-width: 0;
}

.nav-track a {
  position: relative;
  display: block;
  padding: 13px 16px;
  font-family: var(--f-head);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--mute);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease);
}

.nav-track a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: var(--jade);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease), background-color .18s var(--ease);
}

.nav-track a:hover { color: var(--white); }
.nav-track a:hover::after { transform: scaleX(1); }

.nav-track a[aria-current="page"] { color: var(--gold-lite); }
.nav-track a[aria-current="page"]::after { transform: scaleX(1); background: var(--gold); }

.nav-side {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 0 0 auto;
}

.nav-side-note {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mute);
  white-space: nowrap;
}

.nav-side-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  font-family: var(--f-head);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cinnabar);
  text-decoration: none;
  border: 1px solid rgba(200, 64, 47, .5);
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.nav-side-link:hover {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #fff;
}

/* scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  z-index: 80;
  background: linear-gradient(90deg, var(--bronze) 0%, var(--jade) 48%, var(--gold) 100%);
  pointer-events: none;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  margin-top: 96px;
  border-top: 1px solid var(--line);
  background-image:
    linear-gradient(180deg, rgba(16, 26, 23, .72) 0%, rgba(7, 12, 11, 1) 70%),
    linear-gradient(to right, rgba(30, 44, 40, .5) 1px, transparent 1px);
  background-size: auto, 88px 100%;
  color: var(--mute);
}

.footer-frame {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px var(--gut) 40px;
  display: grid;
  grid-template-columns: minmax(230px, 1fr) minmax(0, 2.1fr);
  gap: 48px;
  align-items: start;
}

.footer-brand { display: block; }

.footer-brand-line {
  margin: 16px 0 6px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--white);
}

.footer-brand-note {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mute);
  max-width: 30ch;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.footer-col-title {
  margin-bottom: 15px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--gold);
}

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

.footer-links a {
  font-size: 14px;
  color: var(--mute);
  text-decoration: none;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.footer-links a:hover {
  color: var(--jade);
  padding-left: 4px;
}

.footer-links span {
  font-size: 14px;
  color: #6E8079;
}

.footer-base {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px var(--gut) 44px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 13px;
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  color: var(--mute);
}

.footer-contact .mono { color: var(--white); font-size: 12.5px; }

.footer-sep { color: var(--line); }

.copy-btn {
  padding: 3px 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .1em;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--jade);
  cursor: pointer;
  transition: border-color .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease);
}

.copy-btn:hover { border-color: var(--jade); background: rgba(63, 182, 140, .1); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
}

.footer-region {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mute);
}

.footer-copy {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: #6E8079;
}

/* ============================================================
   SHARED PAGE COMPONENTS
   ============================================================ */

/* breadcrumb */
.breadcrumb {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute);
}

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

.breadcrumb a {
  color: var(--mute);
  text-decoration: none;
  transition: color .18s var(--ease);
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

/* grid */
.grid { display: grid; gap: 28px; }
.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: 5fr 7fr; }

/* surfaces */
.panel {
  padding: 26px;
  background: rgba(16, 26, 23, .72);
  border: 1px solid var(--line);
}

.card {
  position: relative;
  padding: 26px;
  background-image: linear-gradient(180deg, rgba(16, 26, 23, .88) 0%, rgba(7, 12, 11, .88) 100%);
  border: 1px solid var(--line);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.card:hover {
  border-color: rgba(31, 111, 92, .85);
  transform: translateY(-2px);
}

/* table */
.table-shell {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(16, 26, 23, .55);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.data-table thead th {
  font-family: var(--f-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--gold);
  background: rgba(31, 111, 92, .16);
  white-space: nowrap;
}

.data-table tbody tr { transition: background-color .16s var(--ease); }
.data-table tbody tr:hover { background: rgba(63, 182, 140, .08); }
.data-table tbody tr:hover td:first-child { box-shadow: inset 3px 0 0 var(--jade); }
.data-table tbody tr:last-child td { border-bottom: 0; }

/* timeline */
.timeline {
  position: relative;
  padding-left: 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.tl-item {
  position: relative;
  padding: 0 0 30px 34px;
}

.tl-item:last-child { padding-bottom: 0; }

.tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 15px;
  height: 15px;
  background: var(--ink);
  border: 1px solid var(--bronze);
}

.tl-item::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  width: 5px;
  height: 5px;
  background: var(--jade);
}

.tl-item[data-state="current"]::before { border-color: var(--gold); }
.tl-item[data-state="current"]::after { background: var(--gold-lite); }

/* toc */
.toc { position: sticky; top: 124px; }

.toc-title {
  margin-bottom: 12px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--bronze);
}

.toc-list { display: flex; flex-direction: column; }

.toc-list a {
  display: block;
  padding: 8px 12px;
  font-size: 13.5px;
  color: var(--mute);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.toc-list a:hover { color: var(--white); }

.toc-list a[aria-current="true"] {
  color: var(--jade);
  border-left-color: var(--jade);
  background: rgba(31, 111, 92, .14);
}

/* figure / image container */
.figure { margin: 0; }

.figure-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--rock);
  background-image:
    radial-gradient(90% 90% at 22% 12%, rgba(200, 162, 74, .16) 0%, rgba(7, 12, 11, 0) 62%),
    linear-gradient(135deg, rgba(31, 111, 92, .38) 0%, rgba(7, 12, 11, .92) 62%);
  border: 1px solid var(--line);
}

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

.figure-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0) 42%, rgba(230, 206, 143, .14) 100%);
  pointer-events: none;
}

.figure-media.is-1x1 { aspect-ratio: 1 / 1; }
.figure-media.is-3x2 { aspect-ratio: 3 / 2; }
.figure-media.is-21x9 { aspect-ratio: 21 / 9; }

.figure-cap {
  margin-top: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--mute);
}

/* tabs */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--line);
}

.tab {
  padding: 11px 18px;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  font-family: var(--f-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--mute);
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.tab:hover { color: var(--white); }

.tab[aria-selected="true"] {
  color: var(--gold-lite);
  border-bottom-color: var(--gold);
  background: rgba(200, 162, 74, .07);
}

.tab-panel[hidden] { display: none; }

/* accordion */
.acc-item { border-bottom: 1px solid var(--line); }

.acc-btn {
  position: relative;
  width: 100%;
  padding: 16px 42px 16px 0;
  background: transparent;
  border: 0;
  text-align: left;
  font-family: var(--f-head);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--white);
  cursor: pointer;
  transition: color .18s var(--ease);
}

.acc-btn::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-mono);
  font-size: 16px;
  color: var(--jade);
}

.acc-btn[aria-expanded="true"] { color: var(--gold-lite); }
.acc-btn[aria-expanded="true"]::after { content: "–"; color: var(--gold); }

.acc-panel {
  overflow: hidden;
  padding-bottom: 18px;
  font-size: 15px;
  color: var(--mute);
}

.acc-panel[hidden] { display: none; }

/* filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 8px 15px;
  background: transparent;
  border: 1px solid var(--line);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mute);
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.filter-btn:hover { color: var(--white); border-color: var(--bronze); }

.filter-btn[aria-pressed="true"] {
  color: var(--jade);
  border-color: var(--jade);
  background: rgba(63, 182, 140, .1);
}

/* to top */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 70;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--rock);
  border: 1px solid var(--line);
  color: var(--jade);
  font-family: var(--f-mono);
  font-size: 15px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { border-color: var(--jade); color: var(--gold-lite); }

/* reveal */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1180px) {
  .brand-sub { display: none; }
  .nav-side-note { display: none; }
  .footer-frame { gap: 36px; }
}

@media (max-width: 960px) {
  .site-nav { gap: 12px; }
  .nav-track a { padding: 12px 11px; font-size: 14px; }
  .grid--split { grid-template-columns: 1fr; }
  .footer-frame { grid-template-columns: 1fr; gap: 34px; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 74px; }

  .header-frame { padding: 11px 18px; }

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

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0;
    border-top: 1px solid var(--line);
    background: #080E0D;
  }

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

  .nav-track {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0;
  }

  .nav-track a {
    padding: 14px 18px;
    font-size: 15.5px;
    border-bottom: 1px solid var(--line);
  }

  .nav-track a::after { display: none; }

  .nav-track a[aria-current="page"] {
    background: rgba(31, 111, 92, .16);
    box-shadow: inset 3px 0 0 var(--jade);
  }

  .nav-side {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 18px 20px;
  }

  .nav-side-note { display: block; }

  .grid-2,
  .grid-3 { grid-template-columns: 1fr; }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 20px; }

  .toc { position: static; top: auto; }
}

@media (max-width: 620px) {
  :root { --gut: 18px; }

  body { font-size: 15.5px; }

  .section { padding: 52px 0; }

  .brand-mark { width: 38px; height: 38px; font-size: 16px; }
  .brand-line { font-size: 14px; }

  .version-badge { font-size: 11px; padding: 5px 10px; letter-spacing: .06em; }

  .footer-cols { grid-template-columns: 1fr; }
  .footer-frame { padding: 42px var(--gut) 32px; }
  .footer-base { padding: 20px var(--gut) 38px; }
  .footer-meta { flex-direction: column; align-items: flex-start; }

  .to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }

  .data-table { min-width: 540px; font-size: 13.5px; }
  .data-table th,
  .data-table td { padding: 12px 12px; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }

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

  .btn-primary {
    background-image: none;
    background-position: 0 0;
  }

  .card:hover { transform: none; }
  .skew-tag:hover { transform: rotate(-3deg); background: var(--bronze); }
  .footer-links a:hover { padding-left: 0; }
  .to-top { transform: none; }
}