/* /assets/site.css */

:root {
  --color-bg: #0A0A0A;
  --color-panel: #141414;
  --color-line: #1E1E1E;
  --color-accent: #C6FF00;
  --color-accent-blue: #00E5FF;
  --color-silver: #C0C0C0;
  --color-text: #F5F5F5;
  --color-text-sub: #A0A0A0;
  --color-text-dim: #555555;
  --gradient-accent: linear-gradient(135deg, #C6FF00 0%, #00E5FF 100%);
  --font-headline: "Noto Sans SC", "Impact", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "Courier New", monospace;
  --container: 1240px;
  --header-height: 4.5rem;
  --skew: -5deg;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-panel: 0 12px 32px rgba(0, 0, 0, 0.35);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(30, 30, 30, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 30, 30, 0.4) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p, ul, ol, figure {
  margin: 0;
}

ul, ol {
  list-style: none;
  padding: 0;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
}

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

main {
  display: block;
}

#main-content:focus {
  outline: none;
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

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

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 1rem;
  z-index: 2000;
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-bg);
  background: var(--color-accent);
  border: 1px solid var(--color-bg);
  transform: translateY(-250%);
  transition: transform 0.2s var(--ease);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.38);
  border-bottom: 1px solid transparent;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(10, 10, 10, 0.94);
  border-bottom-color: var(--color-line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}

.site-header__bar {
  position: relative;
  height: var(--header-height);
}

.site-header__inner {
  height: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem;
}

.site-header__tag {
  display: none;
  position: absolute;
  top: 0;
  right: 0.75rem;
  bottom: 0;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.3em;
  color: var(--color-text-dim);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  border-left: 1px solid var(--color-line);
  padding-left: 0.4rem;
  pointer-events: none;
  text-transform: uppercase;
}

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

.brand__glyph {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.15rem;
  height: 2.15rem;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.125rem;
  color: var(--color-accent);
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.12), rgba(0, 229, 255, 0.05));
  border: 1px solid rgba(198, 255, 0, 0.35);
  transform: skew(-8deg);
}

.brand__copy {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.125rem;
  letter-spacing: 0.12em;
  color: var(--color-text);
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--color-silver);
  text-transform: uppercase;
}

.brand--footer .brand__glyph {
  color: var(--color-accent);
  border-color: rgba(198, 255, 0, 0.25);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-text-sub);
  cursor: pointer;
  text-transform: uppercase;
}

.nav-toggle:hover {
  color: var(--color-accent);
}

.nav-toggle__label {
  line-height: 1;
}

.nav-toggle__icon {
  position: relative;
  width: 1.25rem;
  height: 0.8rem;
}

.nav-toggle__icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease), top 0.25s var(--ease);
}

.nav-toggle__icon span:nth-child(1) {
  top: 0;
}

.nav-toggle__icon span:nth-child(2) {
  top: calc(50% - 1px);
}

.nav-toggle__icon span:nth-child(3) {
  top: auto;
  bottom: 0;
}

.nav-toggle[aria-expanded="true"] {
  color: var(--color-accent);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(1) {
  top: calc(50% - 1px);
  transform: rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(3) {
  top: calc(50% - 1px);
  transform: rotate(-45deg);
}

.site-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  z-index: 999;
  padding: 1rem 1.25rem 1.5rem;
  background: rgba(16, 16, 16, 0.98);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-line);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s var(--ease);
}

.site-nav[data-open] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

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

.site-nav__item {
  width: 100%;
}

.site-nav__link {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.85rem 0.25rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  color: var(--color-text-sub);
  border-bottom: 1px solid var(--color-line);
  text-decoration: none;
  transition: color 0.2s, background-color 0.2s, padding-left 0.2s;
}

.site-nav__item:last-child .site-nav__link {
  border-bottom: 0;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-accent);
  background: rgba(198, 255, 0, 0.05);
  padding-left: 0.5rem;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.12), rgba(0, 229, 255, 0.04));
  border-bottom-color: rgba(198, 255, 0, 0.5);
}

.site-header__cta {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-bg);
  background: var(--gradient-accent);
  border: 0;
  box-shadow: 0 0 0 1px rgba(198, 255, 0, 0.35);
  text-decoration: none;
  transform: skew(-6deg);
  transition: box-shadow 0.2s var(--ease), filter 0.2s var(--ease), transform 0.2s var(--ease);
}

.site-header__cta:hover,
.site-header__cta:focus-visible {
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.5), 0 0 22px rgba(198, 255, 0, 0.35);
  filter: brightness(1.05);
  transform: skew(-6deg) translateY(-1px);
}

.site-header__progress {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  pointer-events: none;
}

.site-header.is-scrolled .site-header__progress {
  opacity: 1;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: 0;
    box-shadow: none;
    padding: 0;
    backdrop-filter: none;
  }

  .site-nav[data-open] {
    transform: none;
  }

  .site-nav__list {
    flex-direction: row;
    align-items: center;
    gap: 0.15rem;
  }

  .site-nav__item {
    width: auto;
  }

  .site-nav__link {
    width: auto;
    padding: 0.45rem 0.7rem;
    border-bottom: 2px solid transparent;
    font-size: 0.8125rem;
    letter-spacing: 0.06em;
    color: var(--color-text-sub);
    background: transparent;
  }

  .site-nav__item:last-child .site-nav__link {
    border-bottom: 2px solid transparent;
  }

  .site-nav__link:hover,
  .site-nav__link:focus-visible {
    color: var(--color-accent);
    background: transparent;
    padding-left: 0.7rem;
    border-bottom-color: rgba(198, 255, 0, 0.45);
  }

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

@media (min-width: 1024px) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
    padding-right: 4.75rem;
  }

  .site-header__tag {
    display: flex;
  }

  .site-header__cta {
    display: inline-flex;
  }
}

.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  position: relative;
  background:
    radial-gradient(circle at 85% 120%, rgba(0, 229, 255, 0.08), transparent 42%),
    linear-gradient(180deg, transparent, rgba(20, 20, 20, 0.8));
  border-top: 1px solid var(--color-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-accent);
  opacity: 0.55;
}

.site-footer__grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 3.5rem 1.25rem 2.25rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.1rem;
}

.site-footer__statement {
  max-width: 34em;
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--color-text-dim);
  margin: 0;
}

.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.site-footer__title {
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--color-silver);
  text-transform: uppercase;
  margin: 0;
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
}

.site-footer__list a {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s;
}

.site-footer__list a:hover {
  color: var(--color-accent);
  padding-left: 0.3rem;
}

.site-footer__list--plain li {
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--color-text-sub);
}

.site-footer__nav--info {
  position: relative;
  padding-left: 0;
}

.site-footer__legal {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.1rem 1.25rem 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

.site-footer__legal p {
  margin: 0;
  letter-spacing: 0.03em;
}

@media (min-width: 600px) and (max-width: 899px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .site-footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: 3rem;
  }

  .site-footer__nav--info {
    border-left: 1px solid var(--color-line);
    padding-left: 1.25rem;
  }
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  color: var(--color-text);
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  text-decoration: none;
  transform: skew(-5deg);
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s, filter 0.2s;
  cursor: pointer;
}

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

.button--primary {
  background: var(--gradient-accent);
  color: var(--color-bg);
  border-color: transparent;
}

.button--primary:hover {
  color: var(--color-bg);
  border-color: transparent;
  filter: drop-shadow(0 0 12px rgba(198, 255, 0, 0.4));
}

.button--ghost {
  background: transparent;
  color: var(--color-accent);
  border-color: rgba(198, 255, 0, 0.3);
}

.button--ghost:hover {
  background: rgba(198, 255, 0, 0.08);
  color: var(--color-accent);
}

.breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  align-items: center;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: var(--color-line);
}

.breadcrumb__item[aria-current="page"] {
  color: var(--color-text-sub);
}

.breadcrumb__link {
  color: var(--color-text-sub);
  text-decoration: none;
  transition: color 0.2s;
}

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

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.page-hero {
  position: relative;
  min-height: 58vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: calc(var(--header-height) + 3rem) 1.25rem 3rem;
  background:
    radial-gradient(circle at 78% 18%, rgba(0, 229, 255, 0.14), transparent 36%),
    radial-gradient(circle at 18% 82%, rgba(198, 255, 0, 0.08), transparent 32%),
    linear-gradient(180deg, rgba(10, 10, 10, 0.4), var(--color-bg) 88%);
  border-bottom: 1px solid var(--color-line);
  overflow: hidden;
}

.page-hero__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
}

.page-hero__title {
  max-width: 16em;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(2.4rem, 6vw, 4.75rem);
  line-height: 1.02;
  letter-spacing: 0.02em;
  margin: 0.5rem 0 0.9rem;
  color: var(--color-text);
  transform: skew(-5deg);
}

.page-hero__lead {
  max-width: 44em;
  font-size: 1rem;
  line-height: 2;
  color: var(--color-text-sub);
  margin-bottom: 1.2rem;
}

.section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.section--tight {
  padding-block: clamp(2rem, 4vw, 3rem);
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.section-title {
  max-width: 18em;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  line-height: 1.12;
  color: var(--color-text);
  transform: skew(-5deg);
  margin-bottom: 0.6rem;
}

.section-intro {
  max-width: 44em;
  color: var(--color-text-sub);
  line-height: 1.9;
}

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

.grid--split {
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.grid--cards {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@media (min-width: 768px) {
  .grid--split {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }
}

.media-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, rgba(0, 229, 255, 0.14), transparent 46%),
    linear-gradient(135deg, var(--color-panel), #0e0e0e);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-panel);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 30, 30, 0.65) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 30, 30, 0.65) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(198, 255, 0, 0.14);
  pointer-events: none;
}

.media-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.media-frame--wide {
  aspect-ratio: 21 / 9;
}

.spec-plate {
  position: relative;
  padding: 1.1rem 1.25rem 1.25rem;
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-panel);
}

.spec-plate::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 1.4rem;
  height: 1.4rem;
  border-right: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  opacity: 0.8;
}

.spec-plate__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.spec-plate__value {
  font-family: var(--font-mono);
  font-size: 0.925rem;
  color: var(--color-text);
}

.data-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-sub);
}

.data-row:last-child {
  border-bottom: 0;
}

.data-row__value {
  color: var(--color-accent);
  font-weight: 600;
}

.prose {
  max-width: 64ch;
}

.prose p,
.prose ul,
.prose ol {
  margin-bottom: 1rem;
  color: var(--color-text-sub);
  line-height: 1.9;
}

.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-headline);
  color: var(--color-text);
  margin: 2.2rem 0 0.75rem;
  font-weight: 800;
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose ul {
  padding-left: 1.2rem;
  list-style: square;
}

.prose ol {
  padding-left: 1.4rem;
  list-style: decimal;
}

.prose blockquote {
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 2px solid var(--color-accent);
  color: var(--color-text-sub);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}