/* =========================================================
   开元主站 · 共享样式 /assets/site.css
   深色档案库 · 技术蓝图网格 · 铜金索引线
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
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 { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; }
kbd { font-family: inherit; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #0B0D10;
  --ink-soft: #14181D;
  --ink-lift: #171C22;
  --copper: #C08A3E;
  --copper-bright: #E6B96E;
  --cinnabar: #CC4033;
  --paper: #F3EEE5;
  --paper-line: #CFC7B8;
  --graphite: #7C848C;
  --white: #FAF8F4;
  --lamp: #F0D9A8;

  --line-dark: rgba(192, 138, 62, 0.28);
  --line-dark-strong: rgba(192, 138, 62, 0.55);
  --line-paper: rgba(11, 13, 16, 0.16);
  --wash-copper: rgba(192, 138, 62, 0.08);

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1240px;
  --gutter: 24px;
  --header-h: 72px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --dur: 180ms;

  --text-body: rgba(250, 248, 244, 0.86);
  --text-dim: rgba(250, 248, 244, 0.66);
}

/* ---------- 3. Base ---------- */
body {
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; line-height: 1.25; }
h1 { font-size: clamp(2.2rem, 5vw, 4.6rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 2.4vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { max-width: 38rem; }
::selection { background: var(--copper); color: var(--ink); }
:focus-visible { outline: 2px solid var(--copper-bright); outline-offset: 2px; border-radius: 0; }

.mono { font-family: var(--font-mono); font-size: 0.86em; letter-spacing: 0.02em; color: var(--copper); }
.coord { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--graphite); }
.label { font-size: 12px; letter-spacing: 0.12em; color: var(--graphite); }
.rule { height: 1px; border: 0; background: var(--line-dark); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.blueprint-grid {
  background-image:
    linear-gradient(to right, rgba(192, 138, 62, 0.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(192, 138, 62, 0.07) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px;
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed; left: 16px; top: -72px; z-index: 120;
  background: var(--copper-bright); color: var(--ink);
  padding: 10px 16px; font-size: 14px; letter-spacing: 0.08em;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 5. Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease);
}
.site-header::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 13, 16, 0.92), rgba(11, 13, 16, 0));
  transition: opacity 200ms var(--ease);
}
.site-header[data-state="solid"],
.site-header[data-open="true"] {
  background: var(--ink);
  border-bottom-color: var(--copper);
}
.site-header[data-state="solid"]::before,
.site-header[data-open="true"]::before { opacity: 0; }

.header-grid {
  position: relative; z-index: 2;
  max-width: var(--wrap); margin: 0 auto;
  padding: 0 var(--gutter);
  height: var(--header-h);
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 20px;
}

/* brand */
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand__mark {
  flex: none; width: 34px; height: 34px; display: grid; place-items: center;
  border: 1px solid var(--copper); color: var(--copper-bright);
  font-family: var(--font-display); font-size: 18px; line-height: 1;
  background: linear-gradient(135deg, rgba(192, 138, 62, 0.20), rgba(192, 138, 62, 0));
}
.brand__text { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.brand__name { font-family: var(--font-display); font-size: 17px; font-weight: 600; letter-spacing: 0.06em; color: var(--white); }
.brand__line { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--graphite); white-space: nowrap; }

/* primary nav */
.primary-nav { display: flex; justify-content: center; align-items: center; min-width: 0; }
.primary-nav__list { display: flex; align-items: center; gap: 26px; }
.nav-link {
  position: relative; display: inline-block; padding: 8px 0 10px;
  font-size: 15px; letter-spacing: 0.02em; color: var(--text-body);
  transition: color 120ms var(--ease);
}
.nav-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 1px;
  background: var(--copper-bright); transform: scaleX(0); transform-origin: left center;
  transition: transform 120ms var(--ease);
}
.nav-link:hover { color: var(--white); }
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--copper-bright); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); background: var(--copper); }
.nav-link[aria-current="page"]::before {
  content: ""; position: absolute; left: -13px; top: 50%; margin-top: -7px;
  width: 2px; height: 14px; background: var(--copper);
}

/* utility */
.header-utility { display: flex; align-items: center; gap: 8px; justify-self: end; }
.util-btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line-dark); background: transparent; color: var(--graphite);
  padding: 7px 10px; font-size: 12px; letter-spacing: 0.12em; cursor: pointer;
  transition: color 120ms var(--ease), border-color 120ms var(--ease), background-color 120ms var(--ease);
}
.util-btn:hover { color: var(--copper-bright); border-color: var(--line-dark-strong); background: var(--wash-copper); }
.util-btn[aria-pressed="true"] { color: var(--ink); background: var(--copper-bright); border-color: var(--copper-bright); }
.util-btn__badge {
  display: inline-grid; place-items: center; min-width: 17px; height: 17px; padding: 0 4px;
  background: var(--ink-soft); color: var(--copper-bright);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0;
}
.util-btn[aria-pressed="true"] .util-btn__badge { background: var(--ink); color: var(--copper-bright); }
.util-btn__badge[data-active="true"] { background: var(--cinnabar); color: var(--white); }
.kbd {
  font-family: var(--font-mono); font-size: 10px; line-height: 1;
  padding: 3px 5px; border: 1px solid var(--line-dark); color: var(--graphite);
}

/* nav toggle */
.nav-toggle {
  display: none; align-items: center; gap: 8px;
  border: 1px solid var(--line-dark); color: var(--white);
  padding: 8px 10px; font-size: 12px; letter-spacing: 0.12em; cursor: pointer;
}
.nav-toggle:hover { border-color: var(--line-dark-strong); color: var(--copper-bright); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 3px; width: 16px; }
.nav-toggle__bar { display: block; height: 1px; background: var(--copper-bright); transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* search drawer */
.search-panel {
  position: relative; z-index: 2;
  background: var(--ink-soft);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--copper);
}
.search-panel__inner { max-width: var(--wrap); margin: 0 auto; padding: 20px var(--gutter) 24px; }
.search-panel__label { display: block; font-size: 12px; letter-spacing: 0.12em; color: var(--graphite); margin-bottom: 10px; }
.search-panel__input {
  width: 100%; background: var(--ink); border: 1px solid var(--line-dark); color: var(--white);
  padding: 12px 14px; font-family: var(--font-mono); font-size: 14px; letter-spacing: 0.02em;
}
.search-panel__input::placeholder { color: rgba(124, 132, 140, 0.85); }
.search-panel__input:focus { outline: none; border-color: var(--copper-bright); box-shadow: 0 0 0 2px rgba(230, 185, 110, 0.22); }
.search-panel__list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1px; margin-top: 14px; background: var(--line-dark);
}
.search-result {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  background: var(--ink-soft); padding: 10px 12px; font-size: 14px; color: var(--text-body);
  transition: color 120ms var(--ease), background-color 120ms var(--ease);
}
.search-result:hover { color: var(--copper-bright); background: var(--wash-copper); }
.search-result__id { font-family: var(--font-mono); font-size: 11px; color: var(--graphite); }
.search-panel__hint { margin-top: 12px; font-size: 12px; color: var(--graphite); max-width: none; }

/* ---------- 6. Layout helpers ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.site-main { padding-top: var(--header-h); }
.site-main--overlay { padding-top: 0; }
.section-paper {
  background: var(--paper); color: #23282E;
  border-top: 1px solid var(--copper); border-bottom: 1px solid var(--copper);
}
.section-paper h1, .section-paper h2, .section-paper h3 { color: var(--ink); }
.section-paper .section-head__desc,
.section-paper .coord,
.section-paper .label { color: #5C6268; }
.section-paper .rule { background: var(--line-paper); }

.grid-2, .grid-3, .grid-4 { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 7. Section head / breadcrumb ---------- */
.section-head { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.section-head__eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; color: var(--copper); }
.section-head__title { font-family: var(--font-display); font-size: clamp(1.4rem, 2.4vw, 2.1rem); font-weight: 600; }
.section-head__title::after { content: ""; display: block; width: 40px; height: 1px; background: var(--copper); margin-top: 14px; }
.section-head__desc { color: var(--graphite); font-size: 15.5px; }

.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; color: var(--graphite);
  padding: 20px 0;
}
.breadcrumb a { color: var(--graphite); }
.breadcrumb a:hover { color: var(--copper-bright); }
.breadcrumb__sep { color: var(--line-dark-strong); }
.breadcrumb [aria-current="page"] { color: var(--copper-bright); }
.section-paper .breadcrumb a { color: #5C6268; }

/* ---------- 8. Index rail ---------- */
.rail-host { position: relative; }
.rail { display: none; }
.rail__num { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--graphite); }
.rail__link { font-size: 12px; letter-spacing: 0.14em; color: var(--graphite); transition: color 120ms var(--ease); }
.rail__link:hover { color: var(--copper-bright); }
.rail__link[aria-current="true"] { color: var(--copper-bright); }

/* ---------- 9. Card / panel / timeline ---------- */
.panel {
  position: relative; background: var(--ink-soft);
  border: 1px solid var(--line-dark); padding: 22px 24px;
  transition: border-color 120ms var(--ease), background-color 120ms var(--ease);
}
.panel:hover { border-color: var(--line-dark-strong); background: var(--ink-lift); }
.panel__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 10px; }
.panel__title { font-family: var(--font-display); font-size: 19px; font-weight: 600; }
.panel__id { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.06em; color: var(--copper); }
.panel__body { color: var(--text-dim); font-size: 15.5px; }

.timeline { border-top: 1px solid var(--line-dark); }
.timeline__item {
  display: grid; grid-template-columns: 140px 1fr; gap: 24px;
  padding: 20px 0; border-bottom: 1px solid var(--line-dark);
  transition: background-color 120ms var(--ease);
}
.timeline__item:hover { background: var(--wash-copper); }
.timeline__time { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.04em; color: var(--copper); }
.timeline__title { font-family: var(--font-display); font-size: 18px; }
.timeline__text { color: var(--graphite); font-size: 15px; margin-top: 6px; }

/* ---------- 10. Tags / buttons ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 8px; border: 1px solid var(--line-dark);
  font-size: 11px; letter-spacing: 0.12em; color: var(--copper-bright);
}
.tag--new { border-color: var(--cinnabar); color: var(--cinnabar); }
.tag--muted { border-color: rgba(124, 132, 140, 0.4); color: var(--graphite); }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 20px; border: 1px solid var(--copper); background: transparent;
  color: var(--copper-bright); font-size: 14px; letter-spacing: 0.08em; cursor: pointer;
  transition: background-color 120ms var(--ease), color 120ms var(--ease), border-color 120ms var(--ease);
}
.btn:hover { background: var(--copper); color: var(--ink); }
.btn--primary { background: var(--copper); color: var(--ink); border-color: var(--copper); }
.btn--primary:hover { background: var(--copper-bright); border-color: var(--copper-bright); }
.btn--ghost { color: var(--white); border-color: var(--line-dark-strong); }
.btn--ghost:hover { background: var(--wash-copper); color: var(--copper-bright); }
.btn--paper { color: #7A4E12; border-color: rgba(122, 78, 18, 0.5); }
.btn--paper:hover { background: #7A4E12; color: var(--paper); }

/* ---------- 11. Filter ---------- */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 14px 0; margin-bottom: 24px;
  border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark);
}
.filter-btn {
  padding: 6px 12px; border: 1px solid transparent; background: transparent;
  color: var(--graphite); font-size: 12.5px; letter-spacing: 0.1em; cursor: pointer;
  transition: color 120ms var(--ease), background-color 90ms var(--ease), border-color 120ms var(--ease);
}
.filter-btn:hover { color: var(--copper-bright); border-color: var(--line-dark); }
.filter-btn[aria-pressed="true"] { background: var(--copper-bright); border-color: var(--copper-bright); color: var(--ink); }
.filter-empty { display: none; padding: 24px 0; color: var(--graphite); font-size: 14px; }
.filter-empty[data-visible="true"] { display: block; }

/* ---------- 12. Media frames ---------- */
.media-figure { display: block; margin: 0; }
.media-frame {
  position: relative; display: block; width: 100%; aspect-ratio: 16 / 10;
  background-color: var(--ink-soft);
  background-image: repeating-linear-gradient(135deg, rgba(192, 138, 62, 0.10) 0 1px, transparent 1px 10px);
  border: 1px solid var(--line-dark); overflow: hidden;
}
.media-frame > img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.88) contrast(1.04); }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--portrait { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__cap { margin-top: 8px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; color: var(--graphite); }

/* ---------- 13. Prose ---------- */
.prose { max-width: 38rem; font-size: 16.5px; line-height: 1.85; color: var(--text-body); }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2em; font-size: clamp(1.25rem, 2vw, 1.7rem); }
.prose h3 { margin-top: 1.6em; font-size: 1.1rem; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li { list-style: none; position: relative; }
.prose li::before { content: ""; position: absolute; left: -1em; top: 0.85em; width: 8px; height: 1px; background: var(--copper); }
.prose a { color: var(--copper-bright); border-bottom: 1px solid var(--copper); }
.section-paper .prose { color: #2B3036; }
.section-paper .prose a { color: #7A4E12; border-bottom-color: #7A4E12; }

/* ---------- 14. Footer ---------- */
.site-footer {
  position: relative; background: var(--ink); border-top: 1px solid var(--copper);
}
.site-footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: repeating-linear-gradient(90deg, var(--line-dark) 0 1px, transparent 1px 24px);
  pointer-events: none;
}
.footer-grid {
  max-width: var(--wrap); margin: 0 auto;
  padding: 56px var(--gutter) 40px;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px 24px;
  border-bottom: 1px solid var(--line-dark);
}
.footer-brand__note { margin-top: 14px; font-size: 14px; color: var(--graphite); max-width: 28em; }
.footer-col__title {
  font-family: var(--font-body); font-size: 12px; font-weight: 500;
  letter-spacing: 0.14em; color: var(--copper); margin-bottom: 14px;
}
.footer-col__list { display: grid; gap: 8px; }
.footer-col__list a {
  display: inline-block; font-size: 14.5px; color: var(--text-body);
  border-bottom: 1px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}
.footer-col__list a:hover { color: var(--copper-bright); border-bottom-color: var(--copper); }
.footer-item { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; font-size: 14.5px; color: var(--text-dim); }
.footer-item__note { font-family: var(--font-mono); font-size: 11px; color: var(--graphite); text-align: right; }

.footer-legal {
  max-width: var(--wrap); margin: 0 auto;
  padding: 20px var(--gutter);
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 24px;
  border-bottom: 1px solid var(--line-dark); font-size: 13px;
}
.footer-legal__label { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--graphite); }
.footer-legal a { color: var(--graphite); letter-spacing: 0.06em; transition: color 120ms var(--ease); }
.footer-legal a:hover { color: var(--copper-bright); }

.footer-meta {
  max-width: var(--wrap); margin: 0 auto;
  padding: 22px var(--gutter) 48px;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px 32px;
  font-size: 13px; color: var(--graphite);
}
.footer-meta__col { display: grid; gap: 6px; }
.footer-meta__line { max-width: none; }
.footer-meta__key { display: inline-block; min-width: 4.5em; color: rgba(124, 132, 140, 0.85); }
.footer-meta .mono { color: var(--copper); }

/* ---------- 15. Responsive ---------- */
@media (min-width: 1200px) {
  .rail-host { padding-left: 96px; }
  .rail {
    display: flex; position: absolute; left: 0; top: 0; bottom: 0; width: 72px;
    flex-direction: column; align-items: center; gap: 20px; padding-top: 4px;
    border-right: 1px solid var(--line-dark);
  }
  .rail__link { writing-mode: vertical-rl; padding: 6px 0; }
}

@media (max-width: 1180px) {
  .brand__line { display: none; }
  .primary-nav__list { gap: 20px; }
  .nav-link { font-size: 14.5px; }
}

@media (max-width: 1023px) {
  :root { --header-h: 60px; }
  .header-grid { grid-template-columns: 1fr auto; gap: 12px; }
  .nav-toggle { display: inline-flex; }
  .util-btn--pin { display: none; }
  .primary-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    display: flex; flex-direction: column; align-items: stretch; justify-content: flex-start;
    background: var(--ink-soft);
    border-bottom: 1px solid var(--copper);
    padding: 8px 24px 24px;
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
    transform: translateY(-6px); opacity: 0; visibility: hidden;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
  }
  .primary-nav[data-open] { opacity: 1; visibility: visible; transform: none; }
  .primary-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav__list li + li { border-top: 1px solid var(--line-dark); }
  .nav-link { display: block; padding: 14px 0 14px 16px; font-size: 16.5px; }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { color: var(--copper-bright); background: var(--wash-copper); }
  .nav-link[aria-current="page"]::before { left: 0; top: 50%; margin-top: -9px; height: 18px; }
}

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 44px var(--gutter) 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  :root { --gutter: 16px; }
  body { font-size: 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .timeline__item { grid-template-columns: 1fr; gap: 8px; }
  .search-panel__list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-meta { grid-template-columns: 1fr; padding-bottom: 40px; }
  .panel { padding: 18px 16px; }
}

@media (max-width: 420px) {
  .util-btn--fav .util-btn__text { display: none; }
  .brand__name { font-size: 16px; letter-spacing: 0.04em; }
}

/* ---------- 16. Reduced motion ---------- */
@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;
  }
  .nav-link::after { transition: none; }
}