:root {
  --deep-space-blue: #0B1026;
  --nebula-purple: #1A1040;
  --starlight-gold: #FFC400;
  --electric-blue: #00E5FF;
  --silver-mist: #C8D0E0;
  --metallic-gray: #8A94A8;
  --panel-dark: #151D35;
  --positive-green: #00FF88;
  --warning-orange: #FF8C00;
  --header-h: 72px;
  --container-w: 1440px;
  --font-heading: "Source Han Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Courier New", monospace;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--silver-mist);
  background-color: var(--deep-space-blue);
  background-image:
    radial-gradient(60rem 40rem at 88% -8%, rgba(26, 16, 64, 0.6), transparent 60%),
    radial-gradient(70rem 45rem at -10% 25%, rgba(13, 18, 48, 0.8), transparent 55%),
    radial-gradient(1px 1px at 15% 32%, rgba(255,255,255,0.28), transparent 50%),
    radial-gradient(1px 1px at 26% 70%, rgba(255,255,255,0.2), transparent 50%),
    radial-gradient(1.5px 1.5px at 52% 14%, rgba(0,229,255,0.3), transparent 50%),
    radial-gradient(1px 1px at 68% 46%, rgba(255,255,255,0.22), transparent 50%),
    radial-gradient(1.5px 1.5px at 83% 26%, rgba(255,196,0,0.25), transparent 50%),
    radial-gradient(1px 1px at 91% 72%, rgba(255,255,255,0.2), transparent 50%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
body, button, input, select, textarea {
  font-family: var(--font-body);
}
img, svg, video {
  max-width: 100%;
  display: block;
  height: auto;
}
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.15;
  color: var(--silver-mist);
}
h1 {
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  transform: skew(-2deg);
}
h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  transform: skew(-2deg);
}
h3 {
  font-size: 1.35rem;
  font-weight: 800;
}
h4 {
  font-size: 1.05rem;
  font-weight: 700;
}
p {
  margin-bottom: 1.2rem;
}
a {
  color: var(--electric-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}
a:hover {
  color: var(--starlight-gold);
}
ul, ol {
  padding-left: 1.25rem;
}
::selection {
  background: var(--starlight-gold);
  color: var(--deep-space-blue);
}
:focus-visible {
  outline: 2px solid var(--electric-blue);
  outline-offset: 2px;
}
.container {
  width: min(100% - 2rem, var(--container-w));
  margin-inline: auto;
}
#main-content {
  flex: 1;
  width: 100%;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--starlight-gold);
  color: var(--deep-space-blue);
  font-family: var(--font-heading);
  font-weight: 800;
  text-decoration: none;
  transform: translateY(-320%);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: transform 0.2s ease;
}
.skip-link:focus-visible {
  transform: translateY(0);
}
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 150;
  background: linear-gradient(90deg, var(--starlight-gold) 0%, var(--electric-blue) 70%, var(--positive-green) 100%);
  transform: scaleX(0);
  transform-origin: left;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.015) 0 1px, transparent 1px 6px),
    linear-gradient(180deg, rgba(11,16,38,0.97), rgba(15,20,50,0.93));
  box-shadow: inset 3px 0 0 var(--starlight-gold), inset 0 -1px 0 rgba(0,229,255,0.3);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.5rem);
  min-height: var(--header-h);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  flex-shrink: 0;
}
.brand__mark {
  position: relative;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 35% 35%, rgba(0,229,255,0.8), rgba(11,16,38,0.5) 70%);
  box-shadow: inset 0 0 0 1px rgba(0,229,255,0.25), 0 0 14px rgba(0,229,255,0.15);
}
.brand__mark::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--starlight-gold);
  box-shadow: 0 0 10px rgba(255,196,0,0.8);
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  border-top: 1px solid var(--electric-blue);
  border-right: 1px solid var(--electric-blue);
  border-bottom: 1px solid transparent;
  border-left: 1px solid transparent;
  transform: translate(-50%, -50%) rotate(0deg);
  animation: brand-orbit 6s linear infinite;
}
@keyframes brand-orbit {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}
.brand__text {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--silver-mist);
  letter-spacing: 0.02em;
  transform: skew(-2deg);
  white-space: nowrap;
}
.brand__text em {
  font-style: normal;
  font-weight: 700;
  color: var(--electric-blue);
  font-size: 0.78em;
  margin-left: 0.15em;
  letter-spacing: 0.06em;
}
.nav {
  flex: 1;
}
.nav__list {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  list-style: none;
  gap: 0.15rem;
}
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.55rem 0.65rem;
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--silver-mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s ease;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0.65rem;
  right: 0.65rem;
  bottom: 0.3rem;
  height: 2px;
  background: linear-gradient(90deg, var(--starlight-gold), var(--electric-blue));
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 100%, 0 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav__link:hover,
.nav__link:focus-visible,
.nav__link[aria-current="page"] {
  color: var(--starlight-gold);
}
.nav__link:hover::after,
.nav__link:focus-visible::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}
.nav__link[aria-current="page"] .nav__index {
  color: var(--electric-blue);
}
.nav__index {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--metallic-gray);
  letter-spacing: 0;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle__bar {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--silver-mist);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--starlight-gold);
}
.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(-7px) rotate(-45deg);
  background: var(--starlight-gold);
}
.header-meta {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.9rem;
  background: rgba(21,29,53,0.7);
  border: 1px solid rgba(255,255,255,0.07);
  color: var(--metallic-gray);
  font-size: 0.8rem;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
.header-meta__icon {
  position: relative;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric-blue);
  box-shadow: 0 0 6px rgba(0,229,255,0.7);
}
.header-meta__icon::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(0,229,255,0.5);
  animation: live-pulse 1.8s ease-out infinite;
}
@keyframes live-pulse {
  0% { transform: scale(0.5); opacity: 1; }
  70%, 100% { transform: scale(1.5); opacity: 0; }
}
.header-meta__text {
  color: var(--metallic-gray);
}
.header-meta__shortcut {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.1rem 0.35rem;
  background: rgba(255,255,255,0.06);
  color: var(--silver-mist);
}
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }
  .header-meta {
    display: none;
  }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    min-height: calc(100vh - var(--header-h));
    z-index: 90;
    background: linear-gradient(180deg, rgba(11,16,38,0.99), rgba(26,16,64,0.98));
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0.3s ease;
  }
  .nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1.25rem 1.5rem 3rem;
  }
  .nav__link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 0;
    font-size: 1.3rem;
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav__link::after {
    display: none;
  }
}
.site-footer {
  position: relative;
  margin-top: 5rem;
  padding-top: 3.5rem;
  overflow: hidden;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.012) 0 1px, transparent 1px 7px),
    radial-gradient(60rem 30rem at 100% -10%, rgba(26,16,64,0.6), transparent 60%),
    radial-gradient(40rem 20rem at 0% 100%, rgba(21,29,53,0.5), transparent 55%),
    linear-gradient(180deg, #0c1430 0%, #150f31 60%, #0a0d22 100%);
  color: var(--silver-mist);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 75%;
  height: 4px;
  background: linear-gradient(90deg, var(--starlight-gold) 0%, var(--electric-blue) 55%, transparent 100%);
  clip-path: polygon(0 0, calc(100% - 56px) 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.footer-orbit {
  position: absolute;
  right: 4%;
  bottom: 12%;
  width: 190px;
  height: 90px;
  border-top: 1px solid rgba(0,229,255,0.14);
  border-right: 1px solid rgba(0,229,255,0.14);
  border-radius: 0 100% 0 0;
  pointer-events: none;
  opacity: 0.8;
}
.footer-orbit::after {
  content: "";
  position: absolute;
  left: -3px;
  top: -3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--starlight-gold);
  box-shadow: 0 0 8px rgba(255,196,0,0.6);
}
.footer-top {
  display: grid;
  gap: 2.5rem;
  padding-bottom: 3rem;
}
@media (min-width: 720px) {
  .footer-top {
    grid-template-columns: 1.3fr 1fr 1fr;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}
@media (min-width: 1080px) {
  .footer-top {
    grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  }
  .footer-brand {
    grid-column: auto;
  }
}
.footer-brand {
  max-width: 46ch;
}
.footer-brand__desc {
  margin-top: 1.1rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--metallic-gray);
}
.brand--footer .brand__mark {
  width: 34px;
  height: 34px;
}
.footer-col__title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--electric-blue);
  margin-bottom: 1rem;
}
.footer-col--contact .footer-col__title {
  color: var(--starlight-gold);
}
.footer-col__list {
  list-style: none;
  display: grid;
  gap: 0.65rem;
  padding: 0;
}
.footer-col__list a {
  color: var(--silver-mist);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}
.footer-col__list a:hover {
  color: var(--starlight-gold);
}
.footer-contact__line {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  margin-bottom: 0.6rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--silver-mist);
}
.footer-contact__label {
  flex: 0 0 auto;
  min-width: 2.6em;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--metallic-gray);
  padding-top: 2px;
}
.footer-contact__line a {
  color: var(--electric-blue);
  text-decoration: none;
}
.footer-contact__line a:hover {
  color: var(--starlight-gold);
}
.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.4rem 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--metallic-gray);
}
@media (min-width: 720px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}
.footer-bottom__copy,
.footer-bottom__icp {
  margin: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.8rem 1.5rem;
  background: var(--starlight-gold);
  color: var(--deep-space-blue);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.95rem;
  line-height: 1;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255,196,0,0.25);
}
.btn--ghost {
  background: transparent;
  color: var(--electric-blue);
  box-shadow: inset 0 0 0 1px var(--electric-blue);
}
.btn--ghost:hover {
  color: var(--starlight-gold);
  box-shadow: inset 0 0 0 1px var(--electric-blue), 0 8px 20px rgba(0,229,255,0.12);
}
.card {
  background: var(--panel-dark);
  padding: 1.5rem;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
@media (hover: hover) {
  .card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0,0,0,0.35);
  }
}
.panel {
  background:
    linear-gradient(135deg, rgba(0,229,255,0.04), transparent 50%),
    var(--panel-dark);
  padding: 2rem;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}
.panel__title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--silver-mist);
  margin-bottom: 0.75rem;
}
.panel__body {
  color: var(--metallic-gray);
  font-size: 0.95rem;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--electric-blue);
}
.section-label::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--starlight-gold);
}
.chapter-head {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  margin-bottom: 1rem;
}
.chapter-head__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--electric-blue);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0;
  margin: 0 0 2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--metallic-gray);
  list-style: none;
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
}
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--metallic-gray);
  opacity: 0.6;
  margin-right: 0.45rem;
}
.breadcrumb__link {
  color: var(--electric-blue);
  text-decoration: none;
}
.breadcrumb__link:hover {
  color: var(--starlight-gold);
}
.breadcrumb__item.is-active {
  color: var(--silver-mist);
}
.grid {
  display: grid;
  gap: 1.5rem;
}
.grid--cols-2,
.grid--cols-3,
.grid--cols-4 {
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .grid--cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .grid--cols-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1080px) {
  .grid--cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .grid--cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.media-frame {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--panel-dark);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,229,255,0.12), transparent 55%);
  pointer-events: none;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--portrait {
  aspect-ratio: 3 / 4;
}
.media-frame--wide {
  aspect-ratio: 21 / 9;
}
.media-frame__hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--metallic-gray);
}
.trust-strip {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--panel-dark);
  border-left: 3px solid var(--starlight-gold);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--silver-mist);
}
.trust-strip::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 0.5em;
  border-radius: 50%;
  background: var(--positive-green);
  box-shadow: 0 0 8px var(--positive-green);
}
.split-layout {
  display: grid;
  gap: 2.5rem;
}
@media (min-width: 992px) {
  .split-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    align-items: start;
  }
}
.split-layout__side {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  max-height: calc(100vh - var(--header-h) - 3rem);
  overflow-y: auto;
}
@media (max-width: 991px) {
  .split-layout__side {
    position: static;
    max-height: none;
  }
}
[data-scroll-spy] {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  list-style: none;
  padding-left: 0;
}
[data-spy-link] {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  color: var(--metallic-gray);
  text-decoration: none;
  font-size: 0.88rem;
  border-left: 2px solid rgba(255,255,255,0.08);
  transition: color 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}
[data-spy-link]:hover {
  color: var(--silver-mist);
}
[data-spy-link].is-active {
  color: var(--starlight-gold);
  border-left-color: var(--starlight-gold);
  background: linear-gradient(90deg, rgba(255,196,0,0.06), transparent 70%);
}
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  background: rgba(21,29,53,0.9);
  color: var(--electric-blue);
  border: 0;
  box-shadow: inset 0 0 0 1px rgba(0,229,255,0.35), 0 4px 16px rgba(0,0,0,0.35);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--starlight-gold);
  color: var(--deep-space-blue);
  box-shadow: inset 0 0 0 1px var(--starlight-gold), 0 6px 20px rgba(255,196,0,0.25);
}
.back-to-top__arrow {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-top: 2px solid currentColor;
  border-left: 2px solid currentColor;
  transform: rotate(45deg);
  margin-bottom: 0.2rem;
}
:target {
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .brand__mark::after,
  .header-meta__icon::after {
    animation: none;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}