:root {
  --ai-green: #0B3D2E;
  --ai-green-2: #1B5E4A;
  --ai-gold: #F2B01E;
  --ai-gold-light: #F5D47A;
  --ai-red: #A6141F;
  --ai-paper: #F5F0E6;
  --ai-cream: #FFF9EF;
  --ai-ink: #1A1A1A;
  --ai-charcoal: #2B2B2B;
  --ai-teal: #3E7C8A;
  --ai-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", "Songti SC", serif;
  --ai-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --ai-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ai-shadow-hard: 6px 6px 0 rgba(11, 61, 46, 0.95);
  --ai-shadow-soft: 4px 4px 0 rgba(27, 94, 74, 0.25);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 8rem;
}

body {
  font-family: var(--ai-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ai-ink);
  background-color: var(--ai-paper);
  background-image: radial-gradient(rgba(27, 94, 74, 0.12) 0.5px, transparent 0.5px);
  background-size: 26px 26px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font: inherit;
}

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

:focus-visible {
  outline: 3px solid var(--ai-gold);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 300;
  background: var(--ai-gold);
  color: var(--ai-ink);
  font-family: var(--ai-sans);
  font-weight: 700;
  font-size: 0.8125rem;
  padding: 0.55rem 1rem;
  box-shadow: 3px 3px 0 rgba(26, 26, 26, 0.3);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ai-green);
  color: var(--ai-paper);
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.18);
}

.site-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.site-header__inner--top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}

.site-header__nav {
  position: relative;
  background: rgba(0, 0, 0, 0.16);
  border-top: 1px solid rgba(242, 176, 30, 0.25);
}

.site-header__inner--nav {
  display: flex;
  align-items: center;
  min-height: 48px;
}

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  max-width: 100%;
  height: 3px;
  background: var(--ai-gold);
  z-index: 2;
  pointer-events: none;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 0.15rem;
  line-height: 1.2;
}

.brand__name {
  font-family: var(--ai-serif);
  font-weight: 900;
  font-size: clamp(1.05rem, 2.2vw, 1.375rem);
  letter-spacing: 0.04em;
  color: var(--ai-paper);
  white-space: nowrap;
}

.brand__meta {
  font-family: var(--ai-mono);
  font-size: 0.625rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ai-gold);
}

.site-header__ticker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1 1 46%;
  min-width: 0;
}

.site-header__ticker-label {
  flex-shrink: 0;
  font-family: var(--ai-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ai-ink);
  background: var(--ai-gold);
  padding: 0.15rem 0.55rem;
}

.site-header__ticker-viewport {
  overflow: hidden;
  flex: 1;
  min-width: 0;
}

.site-header__ticker-track {
  display: flex;
  width: max-content;
  animation: ai-ticker 22s linear infinite;
}

.site-header__ticker:hover .site-header__ticker-track {
  animation-play-state: paused;
}

.site-header__ticker-text {
  white-space: nowrap;
  padding-right: 2.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  color: rgba(245, 240, 230, 0.9);
}

@keyframes ai-ticker {
  to { transform: translateX(-50%); }
}

.primary-nav {
  flex: 1;
  min-width: 0;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 0;
}

.primary-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.72rem 0.95rem 0.72rem 0;
  margin-right: 0.5rem;
  font-weight: 500;
  font-size: 0.9375rem;
  color: rgba(245, 240, 230, 0.88);
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.primary-nav__index {
  font-family: var(--ai-mono);
  font-size: 0.6875rem;
  color: var(--ai-gold);
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible,
.primary-nav__link[aria-current="page"] {
  color: var(--ai-gold);
  border-bottom-color: var(--ai-gold);
}

.primary-nav__link[aria-current="page"] {
  font-weight: 700;
}

.header-update {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: auto;
  padding: 0 0.2rem 0 0.75rem;
  flex-shrink: 0;
}

.header-update__text {
  font-family: var(--ai-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(245, 240, 230, 0.7);
}

.header-update:hover .header-update__text {
  color: var(--ai-gold);
}

.header-update .tag--new {
  animation: ai-blink 2.4s step-end infinite;
}

@keyframes ai-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.55rem 0.4rem;
  background: transparent;
  border: 0;
  color: var(--ai-paper);
  cursor: pointer;
}

.nav-toggle__box {
  display: grid;
  gap: 4px;
  width: 22px;
}

.nav-toggle__line {
  display: block;
  height: 2px;
  background: var(--ai-gold);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__label {
  font-family: var(--ai-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-footer {
  background: var(--ai-charcoal);
  color: #D6CDBD;
  border-top: 6px solid var(--ai-gold);
}

.site-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.25rem 1.5rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 2.5rem;
}

.site-footer__brand-col,
.site-footer__links-col,
.site-footer__contact-col {
  min-width: 0;
}

.site-footer__logotype {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
  font-family: var(--ai-serif);
  font-weight: 900;
  font-size: 1.375rem;
  letter-spacing: 0.05em;
  color: var(--ai-paper);
}

.site-footer__heading-code {
  font-family: var(--ai-mono);
  font-size: 0.625rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--ai-gold);
}

.site-footer__mission {
  max-width: 48ch;
  margin-top: 0.8rem;
  font-size: 0.875rem;
  line-height: 1.9;
  color: #C9C1B2;
}

.site-footer__icp {
  margin-top: 1rem;
  font-family: var(--ai-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--ai-gold-light);
}

.site-footer__heading {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-family: var(--ai-serif);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--ai-gold);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(242, 176, 30, 0.35);
}

.site-footer__list {
  display: grid;
  gap: 0.55rem;
}

.site-footer__list-item {
  font-size: 0.875rem;
}

.site-footer__link {
  color: #C9C1B2;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__link:hover {
  color: var(--ai-gold);
  padding-left: 4px;
}

.site-footer__contact {
  display: grid;
  gap: 0.65rem;
}

.site-footer__contact-item {
  font-size: 0.875rem;
  line-height: 1.6;
  color: #E4DCCB;
  padding-left: 0.8rem;
  border-left: 2px solid var(--ai-gold);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.6rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__copyright {
  font-size: 0.8125rem;
  color: #A79F8F;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.site-footer__legal-link {
  font-size: 0.8125rem;
  color: #C9C1B2;
}

.site-footer__legal-link:hover {
  color: var(--ai-gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.section--alt {
  background: var(--ai-green);
  color: var(--ai-paper);
}

.chapter {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  border-left: 6px solid var(--ai-gold);
  padding-left: 1rem;
  margin-bottom: 1.5rem;
}

.chapter__num {
  font-family: var(--ai-mono);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ai-green);
  letter-spacing: -0.04em;
  flex-shrink: 0;
}

.chapter__title {
  font-family: var(--ai-serif);
  font-weight: 900;
  font-size: clamp(1.25rem, 2.8vw, 2rem);
  line-height: 1.25;
  color: var(--ai-ink);
}

.chapter__kicker {
  font-family: var(--ai-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ai-green);
}

.section--alt .chapter__num {
  color: var(--ai-gold);
}

.section--alt .chapter__title {
  color: var(--ai-paper);
}

.section--alt .chapter__kicker {
  color: var(--ai-gold-light);
}

.kicker {
  display: inline-block;
  font-family: var(--ai-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ai-gold);
  background: var(--ai-green);
  padding: 0.22rem 0.6rem;
  margin-bottom: 0.8rem;
}

.display-title {
  font-family: var(--ai-serif);
  font-weight: 900;
  line-height: 1.08;
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  letter-spacing: 0.01em;
  color: var(--ai-ink);
}

.section-title {
  font-family: var(--ai-serif);
  font-weight: 900;
  line-height: 1.22;
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  color: var(--ai-ink);
}

.body-text {
  font-size: 0.9375rem;
  line-height: 1.9;
  color: #2C2822;
}

.text-link {
  font-weight: 700;
  color: var(--ai-green);
  text-decoration: underline;
  text-decoration-color: var(--ai-gold);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.text-link:hover {
  color: var(--ai-red);
}

.section--alt .display-title,
.section--alt .section-title {
  color: var(--ai-paper);
}

.section--alt .body-text {
  color: rgba(245, 240, 230, 0.88);
}

.section--alt .kicker {
  background: var(--ai-gold);
  color: var(--ai-ink);
}

.section--alt .text-link {
  color: var(--ai-gold-light);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 700;
  font-family: var(--ai-sans);
  font-size: 0.875rem;
  line-height: 1;
  padding: 0.78rem 1.45rem;
  border: 2px solid var(--ai-ink);
  background: var(--ai-cream);
  color: var(--ai-ink);
  box-shadow: 4px 4px 0 var(--ai-ink);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 var(--ai-ink);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--ai-ink);
}

.btn--gold {
  background: var(--ai-gold);
}

.btn--ghost {
  background: transparent;
  color: var(--ai-paper);
  border-color: var(--ai-paper);
  box-shadow: 4px 4px 0 rgba(242, 176, 30, 0.55);
}

.btn--ghost:hover {
  background: rgba(242, 176, 30, 0.12);
  box-shadow: 6px 6px 0 rgba(242, 176, 30, 0.55);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--ai-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  line-height: 1.25;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--ai-ink);
  background: transparent;
  color: var(--ai-ink);
  text-transform: uppercase;
}

.tag--new {
  background: var(--ai-red);
  color: #fff;
  border-color: var(--ai-red);
}

.tag--gold {
  background: var(--ai-gold);
  color: var(--ai-ink);
  border-color: var(--ai-ink);
}

.card,
.card--paper {
  background: var(--ai-cream);
  border: 2px solid var(--ai-ink);
  box-shadow: var(--ai-shadow-hard);
  padding: clamp(1rem, 2.6vw, 1.75rem);
}

.card--green {
  background: var(--ai-green);
  color: var(--ai-paper);
  border: 2px solid var(--ai-ink);
  box-shadow: 6px 6px 0 rgba(26, 26, 26, 0.85);
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--ai-charcoal);
  border: 2px solid var(--ai-ink);
}

.media-frame--16-9 {
  aspect-ratio: 16 / 9;
}

.media-frame--portrait {
  aspect-ratio: 3 / 4;
}

.media-frame--square {
  aspect-ratio: 1 / 1;
}

.media-frame > img,
.media-frame > svg,
.media-frame > video,
.media-frame > canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px dashed rgba(245, 240, 230, 0.6);
  pointer-events: none;
  z-index: 1;
}

.stat {
  font-family: var(--ai-mono);
}

.stat__value {
  display: block;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--ai-green);
  letter-spacing: -0.02em;
}

.stat__label {
  display: block;
  font-family: var(--ai-sans);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6E6758;
  margin-top: 0.3rem;
}

.section--alt .stat__value {
  color: var(--ai-gold);
}

.section--alt .stat__label {
  color: rgba(245, 240, 230, 0.75);
}

.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: var(--ai-cream);
  border: 2px solid var(--ai-ink);
}

.table th,
.table td {
  text-align: left;
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid rgba(11, 61, 46, 0.15);
}

.table th {
  font-family: var(--ai-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--ai-green);
  color: var(--ai-paper);
  border-bottom: 3px solid var(--ai-gold);
}

.table tbody tr:last-child td {
  border-bottom: 0;
}

.table tbody tr:hover td {
  background: rgba(242, 176, 30, 0.14);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  color: #6E6758;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--ai-gold);
}

.breadcrumb__link:hover {
  color: var(--ai-green);
  text-decoration: underline;
}

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

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  font-family: var(--ai-mono);
  font-size: 0.75rem;
  color: var(--ai-ink);
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.legend__swatch {
  width: 12px;
  height: 12px;
  border: 1px solid var(--ai-ink);
  background: var(--ai-gold);
}

.legend__swatch--green {
  background: var(--ai-green);
}

.legend__swatch--red {
  background: var(--ai-red);
}

.legend__swatch--teal {
  background: var(--ai-teal);
}

.index-list {
  display: grid;
  gap: 0.55rem;
  font-family: var(--ai-mono);
  font-size: 0.8125rem;
}

.index-list__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px dashed rgba(11, 61, 46, 0.28);
}

.index-list__code {
  flex-shrink: 0;
  background: var(--ai-green);
  color: var(--ai-gold);
  padding: 0.1rem 0.45rem;
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
}

.divider-line {
  height: 4px;
  margin: 2rem 0;
  background: repeating-linear-gradient(90deg, var(--ai-green) 0, var(--ai-green) 24px, var(--ai-gold) 24px, var(--ai-gold) 30px, var(--ai-green) 30px, var(--ai-green) 54px);
  border-top: 1px solid rgba(26, 26, 26, 0.08);
}

.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));
}

html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

html[data-js] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

@media (max-width: 1023px) {
  .primary-nav__index {
    display: none;
  }

  .primary-nav__link {
    font-size: 0.8125rem;
    padding: 0.72rem 0.6rem 0.72rem 0;
    margin-right: 0.15rem;
  }

  .header-update {
    display: none;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .site-footer__brand-col {
    grid-column: 1 / -1;
  }

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

@media (max-width: 767px) {
  .site-header__inner--top {
    gap: 0.55rem;
  }

  .site-header__ticker {
    flex-basis: 100%;
    order: 3;
  }

  .site-header__ticker-label {
    display: none;
  }

  .brand__meta {
    letter-spacing: 0.14em;
    font-size: 0.5625rem;
  }

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

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 90;
    display: none;
    background: var(--ai-green);
    border-top: 2px solid var(--ai-gold);
    box-shadow: 0 14px 24px rgba(0, 0, 0, 0.35);
  }

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

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 0.4rem 1.25rem 0.9rem;
  }

  .primary-nav__link {
    display: flex;
    align-items: baseline;
    margin-right: 0;
    padding: 0.85rem 0.25rem;
    font-size: 0.9375rem;
    border-bottom: 1px solid rgba(245, 240, 230, 0.12);
  }

  .primary-nav__index {
    display: inline;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__brand-col {
    grid-column: auto;
  }

  .site-footer__inner {
    padding-top: 2.25rem;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

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

  html {
    scroll-padding-top: 6.5rem;
  }
}

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

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .site-header__ticker-track {
    animation: none;
  }

  html[data-js] [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}