:root {
  --color-ink: #121212;
  --color-ink-deep: #0b0e0d;
  --color-moon: #F5F0E8;
  --color-jade: #00A49A;
  --color-jade-deep: #005C57;
  --color-jade-pale: #E0F5F2;
  --color-red: #D63338;
  --color-gold: #C9A227;
  --color-gray: #6B6B6B;
  --color-line: rgba(0, 164, 154, .28);
  --font-display: "STKaiti", "KaiTi", "STSong", "Songti SC", serif;
  --font-headline: "STHeiti", "SimHei", "Heiti SC", "PingFang SC", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-number: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
}

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

[hidden] {
  display: none !important;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--color-ink);
  background-image:
    linear-gradient(rgba(0, 164, 154, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 164, 154, .05) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--color-moon);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 18% 12%, rgba(0, 164, 154, .12), transparent 42%),
    radial-gradient(ellipse at 84% 80%, rgba(214, 51, 56, .07), transparent 36%);
}

.main-content,
.site-header,
.site-footer {
  position: relative;
  z-index: 1;
}

.main-content {
  min-height: 70vh;
  scroll-margin-top: 5rem;
}

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

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: var(--color-jade);
  text-underline-offset: .2em;
}

::selection {
  background: var(--color-red);
  color: var(--color-moon);
}

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.container {
  width: min(100% - 2rem, 1160px);
  margin-inline: auto;
}

.section {
  padding-block: 3rem;
}

.section--tight {
  padding-block: 1.5rem;
}

.stack {
  display: grid;
  gap: 1rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.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));
}

@media (max-width: 1023px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  padding: .5rem 1rem;
  background: var(--color-jade);
  color: var(--color-ink);
  font-family: var(--font-number);
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .6rem 1rem;
  border: 1px solid var(--color-jade);
  background: transparent;
  color: var(--color-jade);
  font-family: var(--font-number);
  font-size: .8125rem;
  letter-spacing: .08em;
  text-decoration: none;
  cursor: pointer;
  transition:
    background .18s ease,
    color .18s ease,
    border-color .18s ease;
}

.button:hover {
  background: var(--color-jade);
  color: var(--color-ink);
  border-color: var(--color-jade);
}

.button--red {
  border-color: var(--color-red);
  color: var(--color-red);
}

.button--red:hover {
  background: var(--color-red);
  color: var(--color-moon);
}

.button--gold {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.button--gold:hover {
  background: var(--color-gold);
  color: var(--color-ink);
}

.chip {
  display: inline-block;
  padding: .15rem .5rem;
  border: 1px solid var(--color-jade-deep);
  background: transparent;
  color: var(--color-jade);
  font-family: var(--font-number);
  font-size: .6875rem;
  letter-spacing: .08em;
}

.chip--gold {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.chip--red {
  border-color: var(--color-red);
  color: var(--color-red);
}

.card {
  position: relative;
  padding: 1.25rem;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: rgba(0, 92, 87, .08);
  transition:
    border-color .2s ease,
    background .2s ease;
}

.card:hover {
  border-color: var(--color-jade);
  background: rgba(0, 164, 154, .06);
}

.card__title {
  margin: 0 0 .5rem;
  color: var(--color-moon);
  font-family: var(--font-display);
  font-size: 1.125rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 1rem 0;
  list-style: none;
  font-family: var(--font-number);
  font-size: .75rem;
  color: var(--color-gray);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: .5rem;
  color: var(--color-jade-deep);
}

.breadcrumb__link {
  color: var(--color-jade);
  text-decoration: none;
}

.breadcrumb__link[aria-current="page"] {
  color: var(--color-moon);
}

.data-row {
  display: grid;
  grid-template-columns: 5rem 1fr auto;
  align-items: baseline;
  gap: 1rem;
  padding: .625rem 0;
  border-bottom: 1px solid rgba(245, 240, 232, .08);
}

.data-row__label {
  font-family: var(--font-number);
  font-size: .75rem;
  color: var(--color-gray);
}

.data-row__value {
  font-family: var(--font-number);
  font-size: .875rem;
  color: var(--color-moon);
  text-align: right;
}

.data-row__value--red {
  color: var(--color-red);
}

.data-row__value--gold {
  color: var(--color-gold);
}

.vis-frame {
  position: relative;
  width: 100%;
  min-height: 180px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  background-color: rgba(0, 92, 87, .12);
  background-image:
    linear-gradient(rgba(0, 164, 154, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 164, 154, .12) 1px, transparent 1px);
  background-size: 16px 16px;
}

.vis-frame--large {
  min-height: 320px;
}

.vis-frame__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .75rem;
  letter-spacing: .15em;
  text-align: center;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(180deg, rgba(0, 92, 87, .18), rgba(18, 18, 18, .94) 56%),
    var(--color-ink);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-red) 18%,
    var(--color-gold) 50%,
    var(--color-jade) 82%,
    transparent
  );
  opacity: .8;
}

.site-header__inner {
  position: relative;
  padding-block: .9rem .5rem;
}

.masthead {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
}

.masthead__side {
  min-width: 0;
}

.masthead__side--coord {
  padding-left: 1rem;
  border-left: 1px solid var(--color-line);
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .6875rem;
  letter-spacing: .12em;
  line-height: 1.5;
}

.coord-code {
  display: block;
  color: var(--color-jade);
}

.masthead__side--actions {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .5rem;
}

.brand-block {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  color: var(--color-moon);
  text-decoration: none;
}

.brand-block__seal {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--color-red);
  background: linear-gradient(145deg, rgba(201, 162, 39, .18), transparent 62%);
  color: var(--color-red);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.125rem;
  line-height: 1;
  transform: rotate(-4deg);
  transition:
    background .18s ease,
    color .18s ease,
    border-color .18s ease;
}

.brand-block__text {
  display: flex;
  flex-direction: column;
  gap: .05rem;
}

.brand-block__title {
  color: var(--color-moon);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1rem, 4.6vw, 1.375rem);
  letter-spacing: .14em;
  line-height: 1.25;
  white-space: nowrap;
  transition: color .18s ease;
}

.brand-block__sub {
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .625rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand-block:hover .brand-block__seal {
  border-color: var(--color-red);
  background: var(--color-red);
  color: var(--color-moon);
}

.brand-block:hover .brand-block__title {
  color: var(--color-jade);
}

.search-toggle {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-left: auto;
  padding: .45rem .625rem;
  border: 1px solid var(--color-jade);
  background: transparent;
  color: var(--color-jade);
  font-family: var(--font-number);
  font-size: .6875rem;
  letter-spacing: .08em;
  cursor: pointer;
  transition:
    background .18s ease,
    color .18s ease,
    border-color .18s ease;
}

.search-toggle:hover,
.search-toggle[aria-expanded="true"] {
  background: var(--color-jade);
  border-color: var(--color-jade);
  color: var(--color-ink);
}

.search-toggle__icon {
  position: relative;
  display: inline-block;
  width: .8rem;
  height: .8rem;
}

.search-toggle__icon::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: .5rem;
  height: .5rem;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.search-toggle__icon::after {
  content: "";
  position: absolute;
  right: .02rem;
  bottom: .15rem;
  width: .32rem;
  height: 1px;
  background: currentColor;
  transform: rotate(45deg);
}

.header-search {
  position: absolute;
  top: calc(100% + .875rem);
  right: 0;
  z-index: 60;
  display: none;
  width: min(21rem, calc(100vw - 2rem));
  padding: 1rem;
  border: 1px solid var(--color-jade);
  background: var(--color-ink-deep);
  box-shadow: .375rem .375rem 0 rgba(0, 164, 154, .18);
}

.header-search[data-open] {
  display: block;
}

.header-search__label {
  display: block;
  margin-bottom: .375rem;
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .6875rem;
  letter-spacing: .14em;
}

.header-search__field {
  display: block;
}

.header-search__input {
  width: 100%;
  padding: .55rem .625rem;
  border: 1px solid var(--color-jade-deep);
  background: var(--color-ink);
  color: var(--color-moon);
  font-family: var(--font-number);
  font-size: .875rem;
}

.header-search__input:focus {
  outline: none;
  border-color: var(--color-jade);
  box-shadow: 0 0 0 2px rgba(0, 164, 154, .25);
}

.header-search__hint {
  margin: .5rem 0 0;
  color: var(--color-gray);
  font-size: .6875rem;
}

.header-search__empty {
  margin: .5rem 0 0;
  color: var(--color-red);
  font-size: .6875rem;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .35rem;
  padding: .45rem .625rem;
  border: 1px solid var(--color-red);
  background: transparent;
  color: var(--color-red);
  font-family: var(--font-number);
  font-size: .6875rem;
  letter-spacing: .08em;
  cursor: pointer;
}

.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  display: block;
  width: 1rem;
  height: 2px;
  background: currentColor;
  transition:
    transform .18s ease,
    top .18s ease,
    background-color .18s ease;
}

.nav-toggle__bar {
  position: relative;
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bar::before {
  top: -.375rem;
}

.nav-toggle__bar::after {
  top: .375rem;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before,
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  top: 0;
  background: var(--color-red);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  transform: rotate(-45deg);
}

.site-nav {
  position: relative;
  margin-top: .5rem;
  border-top: 1px solid var(--color-line);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .2rem 1.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: .55rem .1rem .5rem;
  border-bottom: 2px solid transparent;
  color: var(--color-moon);
  font-size: .875rem;
  letter-spacing: .12em;
  text-decoration: none;
  transition:
    color .18s ease,
    border-color .18s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -2px;
  left: 0;
  height: 2px;
  background: var(--color-red);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .18s ease;
}

.site-nav__link:hover {
  color: var(--color-jade);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav__link[aria-current="page"] {
  border-bottom-color: var(--color-red);
  color: var(--color-jade);
}

.site-footer {
  position: relative;
  z-index: 5;
  margin-top: 4rem;
  border-top: 1px solid var(--color-line);
  background: var(--color-ink-deep);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--color-jade) 0 45%,
    var(--color-gold) 50%,
    var(--color-red) 55% 100%
  );
  opacity: .8;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  grid-template-areas: "brand nav legal";
  gap: 2.5rem;
  padding-block: 2.5rem 1.5rem;
}

.footer-brand {
  grid-area: brand;
}

.footer-nav {
  grid-area: nav;
}

.footer-legal {
  grid-area: legal;
}

.footer-brand__seal {
  display: inline-block;
  padding: .1rem .45rem;
  border: 1px solid var(--color-gold);
  background: linear-gradient(135deg, rgba(201, 162, 39, .12), transparent 60%);
  color: var(--color-gold);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.25rem;
  transform: rotate(-3deg);
}

.footer-brand__name {
  margin: .75rem 0 .25rem;
  color: var(--color-moon);
  font-family: var(--font-display);
  font-size: 1.375rem;
  letter-spacing: .12em;
}

.footer-brand__line {
  margin: 0;
  color: var(--color-jade);
  font-family: var(--font-number);
  font-size: .75rem;
  letter-spacing: .18em;
}

.footer-heading {
  margin: 0 0 .75rem;
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .6875rem;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links li {
  margin: .35rem 0;
}

.footer-link {
  border-bottom: 1px solid transparent;
  color: var(--color-moon);
  text-decoration: none;
  transition:
    color .18s ease,
    border-color .18s ease;
}

.footer-link:hover {
  border-bottom-color: var(--color-red);
  color: var(--color-red);
}

.footer-link[aria-current="page"] {
  border-bottom-color: var(--color-jade);
  color: var(--color-jade);
}

.footer-contact {
  display: grid;
  gap: .2rem;
  margin-top: 1rem;
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .6875rem;
  font-style: normal;
  line-height: 1.6;
}

.footer-contact__item--email {
  color: var(--color-jade);
}

.footer-meta {
  grid-area: meta;
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem 2rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(0, 164, 154, .14);
}

.footer-trust {
  max-width: 64ch;
  margin: 0;
  color: var(--color-gray);
  font-size: .8125rem;
  line-height: 1.7;
}

.footer-meta__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1rem;
  margin: 0;
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .75rem;
}

.footer-icp {
  color: var(--color-jade);
}

.footer-copy {
  color: var(--color-gray);
}

.footer-tech {
  margin: 0;
  color: var(--color-gray);
  font-family: var(--font-number);
  font-size: .6875rem;
  letter-spacing: .1em;
}

@media (max-width: 1023px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "brand legal"
      "nav nav";
    gap: 2rem;
  }

  .footer-meta {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  .masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
  }

  .masthead__side--coord {
    display: none;
  }

  .masthead__side--actions {
    position: static;
  }

  .brand-block {
    margin-right: auto;
  }

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

  .site-nav {
    display: none;
    margin-top: .5rem;
    border-top: 1px solid var(--color-line);
  }

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

  .site-nav__list {
    flex-direction: column;
    gap: 0;
  }

  .site-nav__item + .site-nav__item {
    border-top: 1px solid rgba(0, 164, 154, .16);
  }

  .site-nav__link {
    display: block;
    padding: .85rem .25rem;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--color-red);
    color: var(--color-jade);
  }

  .header-search {
    right: -1rem;
    width: min(21rem, calc(100vw - 1rem));
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    grid-template-areas:
      "brand"
      "nav"
      "legal";
    gap: 1.5rem;
  }

  .footer-meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .brand-block__sub {
    display: none;
  }

  .brand-block__seal {
    width: 2.2rem;
    height: 2.2rem;
    font-size: .875rem;
  }

  .brand-block__title {
    font-size: 1rem;
    letter-spacing: .08em;
  }

  .search-toggle__text,
  .nav-toggle__text {
    display: none;
  }

  .search-toggle,
  .nav-toggle {
    padding: .45rem .5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}