:root {
  color-scheme: dark;
  --turf-deep: #0B2A1E;
  --turf-mid: #14452F;
  --lime: #C6FF4A;
  --cold: #F4F7F2;
  --night: #171A33;
  --violet: #2B2F5E;
  --ink: #070A08;
  --gray: #9AA79E;
  --amber: #FFB84D;
  --cyan: #73D2DE;
  --font-display: "Archivo Narrow", "Oswald", "Arial Narrow", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", "Noto Sans SC", monospace;
  --shell: min(1240px, calc(100% - 2rem));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 82% -8%, rgba(43, 47, 94, 0.72), transparent 30rem),
    var(--turf-deep);
  color: var(--cold);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body,
button,
input,
select,
textarea {
  font: inherit;
}

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

a {
  color: inherit;
}

p {
  margin: 0;
  text-wrap: pretty;
}

button {
  border-radius: 0;
}

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

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 1rem;
  z-index: 200;
  transform: translateY(-120%);
  padding: 0.65rem 0.9rem;
  background: var(--lime);
  color: var(--ink);
  border: 2px solid var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 80;
}

.header-top {
  background: linear-gradient(90deg, var(--night), var(--violet));
  color: var(--cold);
  border-bottom: 1px solid rgba(198, 255, 74, 0.25);
}

.header-top__inner {
  min-height: 4.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.75rem;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex: 0 0 auto;
  color: var(--cold);
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 3.1rem;
  height: 3.1rem;
  background: rgba(198, 255, 74, 0.06);
  border: 1px solid var(--lime);
  box-shadow: inset 0 -0.35rem 0 rgba(198, 255, 74, 0.12);
  color: var(--lime);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.04em;
}

.brand__line {
  margin-top: 0.3rem;
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
}

.header-top__note {
  margin: 0;
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.header-top__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 0 0 auto;
}

.micro-index {
  display: inline-flex;
  align-items: center;
  min-height: 1.9rem;
  padding: 0.25rem 0.55rem;
  border: 1px solid rgba(115, 210, 222, 0.45);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

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

.button--lime:hover {
  background: var(--cold);
  border-color: var(--cold);
  color: var(--turf-deep);
}

.button--ghost {
  background: transparent;
  color: var(--cold);
  border-color: rgba(244, 247, 242, 0.35);
}

.button--ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.button--compact {
  min-height: 2.15rem;
  padding: 0.4rem 0.7rem;
  font-size: 0.78rem;
}

.header-nav {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(11, 42, 30, 0.94);
  border-bottom: 1px solid rgba(244, 247, 242, 0.13);
  backdrop-filter: blur(8px);
}

@supports not (backdrop-filter: blur(8px)) {
  .header-nav {
    background: var(--turf-deep);
  }
}

.header-nav__inner {
  min-height: 3.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

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

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2.2vw, 2.1rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 3.35rem;
  color: var(--cold);
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.primary-nav__link::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  margin-right: 0.45rem;
  background: transparent;
  border: 1px solid rgba(244, 247, 242, 0.35);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.primary-nav__link:hover {
  color: var(--lime);
  border-color: var(--lime);
}

.primary-nav__link:hover::before {
  background: var(--lime);
  border-color: var(--lime);
}

.primary-nav__link[aria-current="page"] {
  color: var(--lime);
  border-color: var(--lime);
}

.primary-nav__link[aria-current="page"]::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 3px rgba(198, 255, 74, 0.15);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.45rem;
  padding: 0.35rem 0.55rem;
  background: transparent;
  color: var(--cold);
  border: 1px solid rgba(244, 247, 242, 0.32);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.nav-toggle__label {
  white-space: nowrap;
}

.nav-toggle__icon {
  display: grid;
  gap: 3px;
  width: 1rem;
}

.nav-toggle__icon span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header[data-open] .nav-toggle__icon span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__icon span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle__icon span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 150;
  height: 3px;
  pointer-events: none;
  background: rgba(244, 247, 242, 0.08);
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  transform: scaleX(0);
  transform-origin: left center;
}

.page-main {
  display: block;
}

.content-shell {
  width: min(880px, calc(100% - 2rem));
  margin-inline: auto;
}

.prose {
  max-width: 72ch;
}

.prose p {
  margin: 0 0 1.1em;
}

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  line-height: 1.05;
  letter-spacing: 0.02em;
}

.prose h2 {
  margin: 2.4em 0 0.6em;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
}

.prose h3 {
  margin: 1.8em 0 0.45em;
  font-size: clamp(1.2rem, 2.5vw, 1.55rem);
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
}

.prose li {
  margin: 0.35em 0;
}

.breadcrumb {
  margin: 1rem 0 0;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: rgba(154, 167, 158, 0.55);
}

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

.breadcrumb__link:hover {
  color: var(--lime);
}

.breadcrumb__current {
  color: var(--cold);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

.col-span-4 {
  grid-column: span 4;
}

.col-span-6 {
  grid-column: span 6;
}

.col-span-8 {
  grid-column: span 8;
}

.display-xl {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 7vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

.display-lg {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 4.5vw, 3.8rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
}

.section-index {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
}

.section-index::before {
  content: "";
  width: 1.2rem;
  height: 1px;
  background: var(--lime);
}

.lede {
  max-width: 62ch;
  color: var(--cold);
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  line-height: 1.7;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.data-band {
  background: linear-gradient(90deg, var(--night), var(--violet));
  border-block: 1px solid rgba(115, 210, 222, 0.28);
}

.data-band__inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 1px;
  background: rgba(244, 247, 242, 0.12);
}

.data-point {
  min-width: 0;
  padding: clamp(1rem, 2.6vw, 1.6rem);
  background: rgba(11, 42, 30, 0.78);
}

.data-point__value {
  display: block;
  color: var(--lime);
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 3.25rem);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.data-point__label {
  display: block;
  margin-top: 0.45rem;
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.65rem;
  padding: 0.2rem 0.45rem;
  border: 1px solid rgba(244, 247, 242, 0.25);
  color: var(--cold);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

.tag--lime {
  border-color: var(--lime);
  color: var(--lime);
}

.tag--amber {
  border-color: var(--amber);
  color: var(--amber);
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--turf-mid), var(--night));
  border: 1px solid rgba(244, 247, 242, 0.16);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

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

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.55rem 0.75rem;
  background: linear-gradient(180deg, transparent, rgba(7, 10, 8, 0.86));
  color: var(--cold);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, var(--night), var(--violet));
  color: var(--cold);
  border-top: 5px solid var(--lime);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1.5fr) repeat(3, minmax(140px, 0.75fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-block: clamp(2rem, 6vw, 4.5rem);
}

.footer-brand {
  min-width: 0;
}

.footer-brand__link {
  display: inline-block;
  color: var(--lime);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.footer-brand__line {
  margin: 0.65rem 0 0;
  color: var(--cold);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.footer-brand__note {
  max-width: 36rem;
  margin: 0.8rem 0 0;
  color: var(--gray);
  font-size: 0.9rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.55rem;
  margin-top: 1.2rem;
}

.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  max-width: 100%;
  padding: 0.45rem 0.55rem;
  background: rgba(244, 247, 242, 0.04);
  color: var(--cold);
  border: 1px solid rgba(244, 247, 242, 0.18);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  text-align: left;
  overflow-wrap: anywhere;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.copy-chip:hover {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(198, 255, 74, 0.06);
}

.copy-chip[data-copied="true"] {
  border-color: var(--lime);
  color: var(--ink);
  background: var(--lime);
}

.copy-chip[data-copied="error"] {
  border-color: var(--amber);
  color: var(--amber);
}

.footer-col {
  min-width: 0;
}

.footer-col__title {
  margin: 0 0 0.85rem;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-col__link {
  color: var(--cold);
  font-size: 0.86rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.footer-col__link:hover {
  color: var(--lime);
  border-color: var(--lime);
}

.footer-bottom {
  border-top: 1px solid rgba(244, 247, 242, 0.15);
}

.footer-bottom__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

.footer-bottom__inner p {
  margin: 0;
}

.footer-bottom__meta {
  text-align: right;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 920px) {
  .header-top__note {
    display: none;
  }

  .primary-nav__list {
    gap: 0.7rem;
  }

  .primary-nav__link {
    font-size: 0.8rem;
  }
}

@media (max-width: 820px) {
  .header-top__inner {
    min-height: auto;
    flex-wrap: wrap;
  }

  .header-top__meta {
    width: 100%;
    justify-content: space-between;
  }

  .header-nav__inner {
    min-height: 3rem;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 70;
    padding: 0.75rem 1rem 1rem;
    background: linear-gradient(180deg, var(--night), var(--violet));
    border-bottom: 1px solid rgba(198, 255, 74, 0.25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.4rem);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .site-header[data-open] .primary-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .primary-nav__link {
    min-height: auto;
    padding: 0.85rem 0.2rem;
    border-bottom: 1px solid rgba(244, 247, 242, 0.12);
  }

  .primary-nav__link::before {
    width: 0.5rem;
    height: 0.5rem;
  }

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

@media (max-width: 900px) {
  .col-span-4,
  .col-span-6,
  .col-span-8 {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .shell {
    width: calc(100% - 1.5rem);
  }

  .brand__mark {
    width: 2.65rem;
    height: 2.65rem;
    font-size: 0.78rem;
  }

  .brand__name {
    font-size: 1.05rem;
  }

  .brand__line {
    font-size: 0.6rem;
    letter-spacing: 0.1em;
  }

  .header-top__note,
  .micro-index {
    display: none;
  }

  .header-top__meta {
    width: 100%;
    justify-content: flex-end;
  }

  .button--compact {
    min-height: 2rem;
    font-size: 0.72rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom__inner {
    flex-direction: column;
  }

  .footer-bottom__meta {
    text-align: left;
  }

  .copy-chip {
    font-size: 0.68rem;
  }
}

@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;
    scroll-behavior: auto !important;
  }

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

  .scroll-progress__bar {
    transition: none;
  }
}