:root {
  --c-deep: #0D1B2A;
  --c-paper: #F5F0E1;
  --c-gold: #C9A84C;
  --c-neon: #00FF9B;
  --c-ink: #1A1A1A;
  --c-gray-light: #F0F0F0;
  --c-gray: #6B7280;
  --c-red: #EF4444;
  --font-display: "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Sans Pro", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", monospace;
  --max-width: 1280px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

main,
.main-content {
  display: block;
  min-height: 60vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  margin: 0 0 .75em;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--c-gold);
  text-decoration: none;
}

a:hover {
  color: var(--c-neon);
}

:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
  box-shadow: 0 0 0 5px rgba(0, 255, 155, .18);
}

::selection {
  background: var(--c-gold);
  color: var(--c-ink);
}

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

.section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.section--deep {
  background: var(--c-deep);
  color: var(--c-paper);
}

.section--paper {
  background: var(--c-paper);
  color: var(--c-ink);
}

.section--gray {
  background: var(--c-gray-light);
}

.section-head {
  max-width: 860px;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin: 0 0 .5rem;
}

.section-kicker::before {
  content: "";
  display: inline-block;
  width: 1.8rem;
  height: 2px;
  background: var(--c-neon);
  margin-right: .5rem;
  vertical-align: middle;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -.01em;
  margin: 0 0 .75rem;
}

.section--deep .section-title {
  color: var(--c-paper);
}

.section-lede {
  max-width: 62ch;
  color: var(--c-gray);
  font-size: 1.0625rem;
}

.section--deep .section-lede {
  color: rgba(245, 240, 225, .72);
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 2vw, 1.5rem);
}

.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-6 { grid-column: span 6; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }

.card {
  background: var(--c-paper);
  border: 2px solid var(--c-ink);
  box-shadow: 6px 6px 0 var(--c-gold);
  padding: 1.5rem;
}

.card--dark {
  background: var(--c-deep);
  border-color: var(--c-gold);
  color: var(--c-paper);
  box-shadow: 6px 6px 0 var(--c-neon);
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 .5rem;
}

.card__text {
  margin: 0;
  color: var(--c-gray);
}

.card--dark .card__text {
  color: rgba(245, 240, 225, .72);
}

.details {
  border: 1px solid var(--c-ink);
  background: var(--c-paper);
  box-shadow: 3px 3px 0 var(--c-gold);
}

.details summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
}

.details summary::-webkit-details-marker {
  display: none;
}

.details summary:hover {
  color: var(--c-gold);
}

.details[open] {
  box-shadow: 3px 3px 0 var(--c-neon);
}

.details[open] summary {
  border-bottom: 1px solid var(--c-ink);
}

.details__body {
  padding: 1rem 1.25rem;
}

.figure {
  position: relative;
  min-height: 280px;
  background:
    linear-gradient(125deg, rgba(201, 168, 76, .16), transparent 40%),
    linear-gradient(315deg, rgba(0, 255, 155, .08), transparent 50%),
    var(--c-deep);
  border: 1px solid rgba(201, 168, 76, .35);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(120deg, transparent 0 18px, rgba(0, 255, 155, .07) 18px 19px);
}

.figure--hero {
  min-height: 420px;
}

.figure__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__placeholder {
  position: relative;
  z-index: 1;
  padding: 1rem;
  text-align: center;
  color: rgba(245, 240, 225, .62);
  font-family: var(--font-mono);
  font-size: .875rem;
  letter-spacing: .16em;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .7rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: .9375rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-neon {
  background: var(--c-neon);
  color: var(--c-deep);
}

.btn-neon:hover,
.btn-neon:focus-visible {
  color: var(--c-deep);
  box-shadow: 0 0 24px rgba(0, 255, 155, .28);
}

.btn--ghost {
  background: transparent;
  border-color: var(--c-gold);
  color: var(--c-gold);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  color: var(--c-deep);
  background: var(--c-gold);
  box-shadow: 0 0 18px rgba(201, 168, 76, .22);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .75rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  font-size: .875rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--c-gold);
  margin-right: .75rem;
}

.breadcrumbs__link {
  color: var(--c-gray);
}

.breadcrumbs__link:hover {
  color: var(--c-gold);
}

.breadcrumbs__link[aria-current="page"] {
  color: var(--c-ink);
  font-weight: 700;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 2000;
  padding: .75rem 1rem;
  background: var(--c-neon);
  color: var(--c-deep);
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 0 0 4px rgba(13, 27, 42, .4);
}

.skip-link:focus {
  top: 1rem;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--c-neon);
  box-shadow: 0 0 12px rgba(0, 255, 155, .45);
  transform: scaleX(0);
  transform-origin: 0 0;
  z-index: 1500;
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 27, 42, .98);
  border-top: 3px solid var(--c-gold);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-neon) 0 12%, transparent 12%, rgba(201, 168, 76, .35) 84%, var(--c-gold) 100%);
  opacity: .6;
}

.header-shell {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: 1rem;
  max-width: var(--max-width);
  min-height: 4.5rem;
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 2rem);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  white-space: nowrap;
  color: var(--c-paper);
}

.brand:hover,
.brand:focus-visible {
  color: var(--c-neon);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  background: var(--c-gold);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.05rem;
  transform: skewX(-8deg);
  box-shadow: 4px 4px 0 rgba(0, 255, 155, .4);
}

.brand-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: .08em;
  line-height: 1.1;
}

.site-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: .15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-item {
  margin: 0;
}

.nav-link {
  position: relative;
  display: block;
  padding: .875rem .85rem;
  border-radius: 2px;
  color: rgba(245, 240, 225, .82);
  font-weight: 600;
  font-size: .9375rem;
  letter-spacing: .02em;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: .55rem;
  height: 2px;
  background: var(--c-neon);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.nav-link:hover {
  color: var(--c-neon);
  background: rgba(0, 255, 155, .04);
}

.nav-link[aria-current="page"] {
  color: var(--c-paper);
  background: rgba(201, 168, 76, .08);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--c-gold);
}

.header-action {
  margin-left: 1rem;
  padding-left: 1rem;
  border-left: 1px solid rgba(201, 168, 76, .3);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: .5rem;
  background: transparent;
  border: 1px solid rgba(201, 168, 76, .45);
  border-radius: 2px;
  color: var(--c-paper);
  cursor: pointer;
}

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

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  margin: 4px auto;
  transition: transform .25s ease, opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

.site-footer {
  position: relative;
  background: var(--c-deep);
  color: var(--c-paper);
}

.site-footer::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--c-gold) 0 30%, var(--c-neon) 30% 32%, transparent 32%, rgba(201, 168, 76, .4) 70%, var(--c-gold) 100%);
}

.footer-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem clamp(1rem, 3vw, 2rem) 2.5rem;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.5fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.footer-brand .brand {
  color: var(--c-paper);
}

.footer-statement {
  max-width: 32ch;
  margin: 1rem 0 0;
  color: rgba(245, 240, 225, .65);
  font-size: .9375rem;
}

.footer-title {
  color: var(--c-gold);
  font-size: .8125rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}

.footer-links {
  display: grid;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-block;
  color: rgba(245, 240, 225, .72);
  transition: color .18s ease, padding-left .18s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--c-neon);
  padding-left: .3rem;
}

.contact-list {
  display: grid;
  gap: .8rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.contact-value {
  display: block;
  color: rgba(245, 240, 225, .85);
}

.footer-meta {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem clamp(1rem, 3vw, 2rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1.5rem;
  border-top: 1px solid rgba(201, 168, 76, .25);
  color: rgba(245, 240, 225, .65);
  font-size: .8125rem;
}

.footer-meta a {
  color: rgba(245, 240, 225, .8);
}

.footer-meta a:hover {
  color: var(--c-neon);
}

.footer-icp {
  margin-left: auto;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .55s cubic-bezier(.2, .7, .3, 1), transform .55s cubic-bezier(.2, .7, .3, 1);
  will-change: opacity, transform;
}

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

@media (max-width: 960px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--c-deep);
    border-top: 1px solid rgba(201, 168, 76, .35);
    border-bottom: 1px solid rgba(0, 255, 155, .2);
    box-shadow: 0 18px 30px rgba(0, 0, 0, .4);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .5rem 0 0;
  }

  .nav-link {
    padding: .95rem 1.25rem;
    border-left: 3px solid transparent;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link:hover,
  .nav-link[aria-current="page"] {
    border-left-color: var(--c-neon);
    background: rgba(0, 255, 155, .05);
  }

  .header-action {
    margin: .5rem 1.25rem 1.25rem;
    padding-left: 0;
    border-left: 0;
    justify-content: center;
  }

  .header-shell {
    min-height: 4rem;
  }

  .col-span-4,
  .col-span-5,
  .col-span-7,
  .col-span-8 {
    grid-column: span 6;
  }
}

@media (max-width: 800px) {
  .footer-shell {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .col-span-4,
  .col-span-5,
  .col-span-6,
  .col-span-7,
  .col-span-8 {
    grid-column: span 12;
  }

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

  .footer-icp {
    margin-left: 0;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

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