:root {
  color-scheme: dark;
  --clr-deep: #0B1F3A;
  --clr-gold: #D4AF37;
  --clr-red: #E43636;
  --clr-cyan: #00E5FF;
  --clr-purple: #8A2BE2;
  --clr-purple-light: #B06FF0;
  --clr-warm: #F5F7FA;
  --clr-steel: #2C3E50;
  --clr-line: #4A5C6B;
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;
  --container: 1400px;
  --gutter: 1.5rem;
  --header-h: 80px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.4s;
  --z-header: 100;
  --z-progress: 120;
  --z-skip: 999;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--clr-warm);
  background-color: var(--clr-deep);
  background-image:
    radial-gradient(ellipse at 80% 10%, rgba(0, 229, 255, 0.05), transparent 55%),
    linear-gradient(rgba(74, 92, 107, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 92, 107, 0.07) 1px, transparent 1px);
  background-size: auto, 40px 40px, 40px 40px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--clr-cyan);
  text-decoration: none;
}

a:hover {
  color: var(--clr-gold);
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 900;
  line-height: 1.2;
  color: var(--clr-warm);
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--clr-cyan);
  outline-offset: 2px;
}

::-moz-focus-inner {
  border: 0;
}

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

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-skip);
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: var(--clr-gold);
  color: var(--clr-deep);
  font-weight: 700;
  font-size: 0.9375rem;
  transform: translateY(-120%);
  transition: transform 0.3s var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline: 3px solid var(--clr-cyan);
  outline-offset: 3px;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--clr-gold), var(--clr-red));
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.35);
  pointer-events: none;
  z-index: 5;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: linear-gradient(to bottom, rgba(11, 31, 58, 0.82), rgba(11, 31, 58, 0));
  border-bottom: 1px solid transparent;
  transition: background 0.45s var(--ease), border-color 0.45s var(--ease), box-shadow 0.45s var(--ease);
}

.site-header[data-scrolled] {
  background: rgba(11, 31, 58, 0.96);
  border-bottom-color: rgba(212, 175, 55, 0.28);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  color: var(--clr-warm);
  text-decoration: none;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--clr-warm);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.12), transparent 60%), var(--clr-deep);
  border: 1px solid var(--clr-gold);
  color: var(--clr-gold);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  position: relative;
  flex-shrink: 0;
}

.brand__mark::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  right: -3px;
  bottom: -3px;
  border: 1px solid rgba(212, 175, 55, 0.25);
  pointer-events: none;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand__name {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 1.0625rem;
  letter-spacing: 0.04em;
  line-height: 1.25;
  color: var(--clr-warm);
  white-space: nowrap;
}

.brand__tagline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: rgba(245, 247, 250, 0.6);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--clr-cyan);
  position: relative;
}

.status-dot::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 1px solid rgba(0, 229, 255, 0.35);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(245, 247, 250, 0.3);
  background: rgba(11, 31, 58, 0.4);
  transition: border-color 0.3s ease, background 0.3s ease;
  flex-shrink: 0;
}

.nav-toggle:hover {
  border-color: var(--clr-gold);
  background: rgba(11, 31, 58, 0.7);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--clr-warm);
  transition: transform 0.35s var(--ease), opacity 0.25s ease, background 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--clr-gold);
}

.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(-7px) rotate(-45deg);
  background: var(--clr-gold);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.nav__link {
  display: inline-block;
  padding: 0.5rem 0.875rem;
  color: rgba(245, 247, 250, 0.82);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  position: relative;
  transition: color 0.3s ease;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0.875rem;
  right: 0.875rem;
  bottom: 0.125rem;
  height: 2px;
  background: var(--clr-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav__link:hover {
  color: var(--clr-warm);
}

.nav__link:hover::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav__link[aria-current="page"] {
  color: var(--clr-gold);
}

.site-footer {
  background: radial-gradient(ellipse at 15% 0%, rgba(212, 175, 55, 0.06), transparent 45%), var(--clr-deep);
  border-top: 2px solid var(--clr-gold);
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 140px;
  height: 2px;
  background: var(--clr-red);
}

.footer-inner {
  padding-block: 4rem 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1.6fr;
  gap: 3.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--clr-line);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.brand--footer .brand__mark {
  width: 52px;
  height: 52px;
  font-size: 1.25rem;
}

.footer-trust {
  max-width: 32rem;
  color: rgba(245, 247, 250, 0.62);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.footer-heading {
  font-size: 0.8125rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  color: var(--clr-gold);
  margin-bottom: 1.25rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
}

.footer-links__list {
  display: grid;
  gap: 0.75rem;
}

.footer-links__list a {
  display: inline-block;
  padding-left: 1rem;
  color: rgba(245, 247, 250, 0.78);
  font-size: 0.9375rem;
  position: relative;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-links__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 5px;
  background: var(--clr-gold);
}

.footer-links__list a:hover {
  color: var(--clr-gold);
  padding-left: 1.375rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-contact p {
  color: rgba(245, 247, 250, 0.75);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.footer-contact a {
  color: var(--clr-cyan);
}

.footer-contact__note {
  margin-top: 0.75rem;
  font-size: 0.8125rem !important;
  color: rgba(245, 247, 250, 0.5) !important;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.5rem;
  color: rgba(245, 247, 250, 0.45);
  font-size: 0.8125rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.625rem;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.05em;
  line-height: 1;
  border: 1px solid var(--clr-line);
  color: var(--clr-warm);
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.btn:hover {
  border-color: var(--clr-gold);
  color: var(--clr-gold);
}

.btn--primary {
  background: var(--clr-gold);
  border-color: var(--clr-gold);
  color: var(--clr-deep);
}

.btn--primary:hover {
  background: transparent;
  color: var(--clr-gold);
}

.btn--outline {
  border-color: var(--clr-gold);
  color: var(--clr-gold);
}

.btn--outline:hover {
  background: var(--clr-gold);
  color: var(--clr-deep);
}

.btn--red {
  background: var(--clr-red);
  border-color: var(--clr-red);
  color: var(--clr-warm);
}

.btn--red:hover {
  background: transparent;
  color: var(--clr-red);
}

.section {
  padding-block: 4.5rem;
}

.section--tinted {
  background: rgba(44, 62, 80, 0.28);
  border-block: 1px solid var(--clr-line);
}

.section--line {
  border-top: 1px solid var(--clr-line);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.section-head--block {
  flex-direction: column;
  align-items: flex-start;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clr-gold);
  margin-bottom: 0.75rem;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--clr-gold);
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.01em;
  margin-bottom: 0.75rem;
}

.section-desc {
  max-width: 42rem;
  color: rgba(245, 247, 250, 0.65);
  font-size: 1rem;
  line-height: 1.75;
}

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

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

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--clr-steel);
  border: 1px solid var(--clr-line);
  padding: 1.625rem;
  position: relative;
  transition: transform 0.35s var(--ease), border-color 0.35s ease, box-shadow 0.35s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--clr-gold);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.35);
  border-color: rgba(212, 175, 55, 0.45);
}

.card:hover::before {
  opacity: 1;
}

.card--metric {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card__label {
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(245, 247, 250, 0.55);
}

.data-number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 3rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--clr-gold);
  font-variant-numeric: tabular-nums;
}

.card--cyan .data-number {
  color: var(--clr-cyan);
}

.card--red .data-number {
  color: var(--clr-red);
}

.card--purple .data-number {
  color: var(--clr-purple-light);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border: 1px solid var(--clr-line);
  color: rgba(245, 247, 250, 0.7);
}

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

.tag--red {
  border-color: var(--clr-red);
  color: #FF6B6B;
}

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

.tag--purple {
  border-color: var(--clr-purple-light);
  color: var(--clr-purple-light);
}

.breadcrumb {
  margin-bottom: 2rem;
  font-size: 0.8125rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb__item {
  color: rgba(245, 247, 250, 0.5);
}

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

.breadcrumb__link {
  color: rgba(245, 247, 250, 0.55);
}

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

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

.prose {
  max-width: 44rem;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: rgba(245, 247, 250, 0.82);
}

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

.prose > h2 {
  margin-top: 2.25em;
  font-size: 1.5rem;
  color: var(--clr-warm);
}

.prose > h3 {
  margin-top: 2em;
  font-size: 1.25rem;
  color: var(--clr-warm);
}

.prose p {
  line-height: 1.85;
}

.prose ul {
  padding-left: 1.25em;
}

.prose li {
  position: relative;
  padding-left: 0.5em;
  margin-bottom: 0.4em;
}

.prose li::before {
  content: "";
  position: absolute;
  left: -1em;
  top: 0.7em;
  width: 5px;
  height: 5px;
  background: var(--clr-gold);
}

.prose a {
  color: var(--clr-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(0, 229, 255, 0.25);
  text-underline-offset: 4px;
}

.prose a:hover {
  color: var(--clr-gold);
  text-decoration-color: rgba(212, 175, 55, 0.5);
}

.divider {
  height: 1px;
  border: none;
  background: var(--clr-line);
  margin-block: 2.5rem;
}

.img-container {
  position: relative;
  overflow: hidden;
  background: var(--clr-steel);
  border: 1px solid var(--clr-line);
  aspect-ratio: 16 / 9;
}

.img-container > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-container[data-label]::after {
  content: attr(data-label);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(245, 247, 250, 0.35);
  background: linear-gradient(135deg, transparent 70%, rgba(212, 175, 55, 0.06) 100%);
}

.img-container:has(img)::after {
  display: none;
}

.img-container--16-10 {
  aspect-ratio: 16 / 10;
}

.img-container--4-3 {
  aspect-ratio: 4 / 3;
}

.img-container--1-1 {
  aspect-ratio: 1 / 1;
}

.img-container--wide {
  aspect-ratio: 21 / 9;
}

.page-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 4rem;
  position: relative;
}

@media (max-width: 1023px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(11, 31, 58, 0.98);
    border-bottom: 1px solid rgba(212, 175, 55, 0.3);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.45s var(--ease), visibility 0s 0.45s;
  }

  .nav[data-open] {
    max-height: 520px;
    visibility: visible;
    transition: max-height 0.45s var(--ease), visibility 0s;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem 1.5rem 1.25rem;
  }

  .nav__item {
    border-bottom: 1px solid rgba(74, 92, 107, 0.35);
  }

  .nav__item:last-child {
    border-bottom: none;
  }

  .nav__link {
    display: block;
    padding: 0.875rem 0.5rem;
    font-size: 1rem;
  }

  .nav__link::after {
    left: 0.5rem;
    right: auto;
    width: 2px;
    height: 0;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%) scaleY(0);
  }

  .nav__link:hover::after,
  .nav__link[aria-current="page"]::after {
    height: 24px;
    transform: translateY(-50%) scaleY(1);
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

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

@media (max-width: 639px) {
  :root {
    --gutter: 1rem;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .section {
    padding-block: 3rem;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

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

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

  .brand__name {
    font-size: 0.9375rem;
  }

  .brand__mark {
    width: 36px;
    height: 36px;
    font-size: 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;
    transition-delay: 0s !important;
  }
}