:root {
  --ff-orange: #FF6B00;
  --deep-blue: #0A1F44;
  --night-blue: #071428;
  --neon-lime: #C6FF00;
  --electric-blue: #00D4FF;
  --cold-gray: #F3F5F7;
  --ink: #1A2A3A;
  --danger-red: #FF3B30;
  --dark-purple: #8B5CF6;
  --rail-width: 296px;
  --font-display: "Anton", "Noto Sans SC", "Arial Narrow", sans-serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

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

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

body, h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote, dl, dd {
  margin: 0;
}

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

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

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

body {
  min-height: 100vh;
  background: var(--cold-gray);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  padding-top: 72px;
  -webkit-font-smoothing: antialiased;
}

#main-content {
  scroll-margin-top: 5.5rem;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  left: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.07) 1px, transparent 1px);
  background-size: 32px 32px;
}

body > * {
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--electric-blue);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 4000;
  background: var(--neon-lime);
  color: var(--deep-blue);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s ease;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: linear-gradient(180deg, var(--deep-blue), var(--night-blue));
  border-bottom: 1px solid rgba(0, 212, 255, 0.35);
}

.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 8px,
    rgba(0, 212, 255, 0.09) 8px,
    rgba(0, 212, 255, 0.09) 9px
  );
}

.site-header__rail {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  padding: 0.75rem 1rem;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.site-brand__mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: var(--ff-orange);
  color: var(--deep-blue);
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}

.site-brand__name {
  display: block;
  color: var(--cold-gray);
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  line-height: 1;
  text-transform: uppercase;
}

.site-brand__en {
  display: block;
  color: var(--electric-blue);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  line-height: 1.4;
  margin-top: 0.15rem;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid rgba(243, 245, 247, 0.35);
  color: var(--cold-gray);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle__line {
  display: block;
  position: relative;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: background 0.2s ease;
}

.nav-toggle__line::before,
.nav-toggle__line::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.nav-toggle__line::before {
  top: -7px;
}

.nav-toggle__line::after {
  top: 7px;
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line::before {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line::after {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 2;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: linear-gradient(180deg, var(--deep-blue), var(--night-blue));
  border-bottom: 1px solid rgba(0, 212, 255, 0.35);
  box-shadow: 0 1.5rem 3rem rgba(7, 20, 40, 0.55);
}

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

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  width: 100%;
}

.site-nav__item {
  width: 100%;
}

.site-nav__link {
  display: block;
  padding: 0.7rem 0.9rem;
  color: var(--cold-gray);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--ff-orange);
  background: rgba(255, 107, 0, 0.08);
  border-left-color: var(--ff-orange);
}

.site-nav__link[aria-current="page"] {
  color: var(--ff-orange);
  border-left-color: var(--ff-orange);
  background: linear-gradient(90deg, rgba(255, 107, 0, 0.16), transparent 75%);
}

.site-nav__cta {
  display: block;
  background: var(--ff-orange);
  color: var(--deep-blue);
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
  text-decoration: none;
  padding: 0.85rem 1rem;
  transition: background 0.2s ease, color 0.2s ease;
}

.site-nav__cta:hover {
  background: var(--neon-lime);
  color: var(--deep-blue);
}

.site-footer {
  background: linear-gradient(180deg, var(--night-blue), var(--deep-blue));
  color: var(--cold-gray);
  padding: 3rem clamp(1rem, 4vw, 3rem);
  border-top: 4px solid transparent;
  border-image: linear-gradient(
    90deg,
    var(--ff-orange) 0 25%,
    var(--electric-blue) 25% 50%,
    var(--neon-lime) 50% 75%,
    var(--dark-purple) 75% 100%
  ) 1;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  max-width: 1240px;
  margin-inline: auto;
}

.site-footer__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  color: var(--cold-gray);
  margin-bottom: 0.5rem;
}

.site-footer__about {
  color: rgba(243, 245, 247, 0.75);
  font-size: 0.95rem;
}

.site-footer__title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ff-orange);
  margin-bottom: 1rem;
}

.site-footer__nav ul,
.site-footer__contact ul {
  display: grid;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.site-footer__nav a {
  color: var(--cold-gray);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-footer__nav a:hover {
  color: var(--ff-orange);
}

.site-footer__contact li {
  color: rgba(243, 245, 247, 0.78);
}

.site-footer__service-note {
  margin-top: 1rem;
  color: var(--neon-lime);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.site-footer__meta {
  max-width: 1240px;
  margin: 2.5rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(0, 212, 255, 0.25);
  display: grid;
  gap: 0.5rem;
  color: rgba(243, 245, 247, 0.6);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.page-shell {
  max-width: 1440px;
  margin-inline: auto;
  padding: clamp(1.5rem, 4vw, 3.5rem);
}

.container {
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.prose {
  max-width: 70ch;
}

.prose p + p {
  margin-top: 1.25em;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0 0 2rem;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(26, 42, 58, 0.62);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--electric-blue);
}

.breadcrumb a {
  color: var(--ff-orange);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--deep-blue);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn--primary {
  background: var(--ff-orange);
  border-color: var(--ff-orange);
  color: var(--deep-blue);
}

.btn--primary:hover {
  background: var(--neon-lime);
  border-color: var(--neon-lime);
  color: var(--deep-blue);
}

.btn--ghost {
  border-color: rgba(10, 31, 68, 0.35);
  color: var(--deep-blue);
}

.btn--ghost:hover {
  border-color: var(--ff-orange);
  color: var(--ff-orange);
}

.btn--lime {
  background: var(--neon-lime);
  border-color: var(--neon-lime);
  color: var(--deep-blue);
}

.btn--lime:hover {
  background: var(--ff-orange);
  border-color: var(--ff-orange);
  color: var(--deep-blue);
}

.tag {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--deep-blue);
  background: var(--cold-gray);
  border: 1px solid var(--electric-blue);
}

.tag--orange {
  border-color: var(--ff-orange);
  color: var(--ff-orange);
  background: rgba(255, 107, 0, 0.08);
}

.tag--lime {
  border-color: var(--neon-lime);
  color: var(--ink);
  background: rgba(198, 255, 0, 0.15);
}

.tag--purple {
  border-color: var(--dark-purple);
  color: var(--dark-purple);
  background: rgba(139, 92, 246, 0.07);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--electric-blue);
}

.section-label::before {
  content: "";
  width: 2.5rem;
  height: 1px;
  background: currentColor;
}

.section-label--orange {
  color: var(--ff-orange);
}

.section-label--lime {
  color: var(--neon-lime);
}

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

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

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

.panel {
  background: var(--cold-gray);
  border: 1px solid rgba(10, 31, 68, 0.14);
  box-shadow: 4px 4px 0 rgba(10, 31, 68, 0.08);
  padding: 1.5rem;
}

.panel--dark {
  background: var(--deep-blue);
  color: var(--cold-gray);
  border-color: rgba(0, 212, 255, 0.25);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--ink);
}

.data-table th {
  text-align: left;
  padding: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--deep-blue);
  border-bottom: 1px solid var(--electric-blue);
}

.data-table td {
  padding: 0.75rem;
  border-bottom: 1px solid rgba(26, 42, 58, 0.12);
}

.data-table--dark {
  color: var(--cold-gray);
}

.data-table--dark th {
  color: var(--neon-lime);
  border-bottom-color: var(--ff-orange);
}

.data-table--dark td {
  border-bottom-color: rgba(243, 245, 247, 0.15);
}

.data-table--dark .is-highlight {
  color: var(--neon-lime);
  font-weight: 700;
}

.media-frame {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(145deg, var(--deep-blue), var(--night-blue));
  border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--electric-blue);
}

.media-frame img {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.media-frame::before {
  content: attr(data-caption);
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  z-index: 2;
  max-width: calc(100% - 1.5rem);
  padding: 0.25rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--neon-lime);
  background: rgba(7, 20, 40, 0.78);
}

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

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

.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.js [data-reveal][data-reveal-delay="1"] {
  transition-delay: 0.08s;
}

.js [data-reveal][data-reveal-delay="2"] {
  transition-delay: 0.16s;
}

.js [data-reveal][data-reveal-delay="3"] {
  transition-delay: 0.24s;
}

.js [data-reveal][data-reveal-delay="4"] {
  transition-delay: 0.32s;
}

.js [data-reveal][data-reveal-delay="5"] {
  transition-delay: 0.4s;
}

.js [data-reveal][data-reveal-delay="6"] {
  transition-delay: 0.48s;
}

@media (min-width: 1024px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-width);
  }

  body::before {
    left: var(--rail-width);
  }

  #main-content {
    scroll-margin-top: 0;
  }

  .site-header {
    width: var(--rail-width);
    height: 100vh;
    bottom: 0;
    border-right: 1px solid rgba(0, 212, 255, 0.3);
    border-bottom: none;
  }

  .site-header__rail {
    height: 100%;
    min-height: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 2rem 1.25rem;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    position: static;
    flex-direction: column;
    flex: 1;
    gap: 1.5rem;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
  }

  .site-nav__list {
    margin-top: 1.5rem;
  }

  .site-nav__cta {
    margin-top: auto;
  }

  .site-footer {
    padding: 3.5rem clamp(2rem, 5vw, 4rem);
  }
}

@media (max-width: 900px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

@media (max-width: 760px) {
  .grid-cols-2,
  .grid-cols-3 {
    grid-template-columns: 1fr;
  }

  .data-table {
    font-size: 0.75rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.5rem;
  }

  .site-brand__name {
    font-size: 1.1rem;
  }

  .site-brand__en {
    font-size: 0.58rem;
  }

  .site-brand__mark {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
}

@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;
  }

  .nav-toggle__line,
  .nav-toggle__line::before,
  .nav-toggle__line::after {
    transition: none;
  }

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