:root {
  --color-bg: #080F1D;
  --color-bg-soft: #0A1628;
  --color-primary: #0A1F44;
  --color-primary-deep: #06142E;
  --color-text: #E9EDF2;
  --color-muted: #8B9BB4;
  --color-line: rgba(233, 237, 242, 0.14);
  --color-line-strong: rgba(233, 237, 242, 0.28);
  --color-surface: rgba(255, 255, 255, 0.04);
  --color-accent-orange: #FF6B35;
  --color-accent-green: #00E5A0;
  --font-display: "Oswald", "Impact", "Arial Narrow", "Arial", sans-serif;
  --font-body: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-height: 72px;
  --site-width: 1440px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-panel: 12px 20px 40px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: #fff;
}

::selection {
  background: var(--color-accent-orange);
  color: #fff;
}

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

#main-content {
  scroll-margin-top: var(--header-height);
  outline: none;
}

.container {
  width: min(100% - 48px, var(--site-width));
  margin-inline: auto;
}

.section {
  padding-block: clamp(80px, 12vh, 140px);
  position: relative;
}

.section--bleed {
  padding-inline: 0;
}

.section__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-accent-green);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section__kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--color-accent-orange);
}

.section__heading {
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  margin-bottom: 1rem;
  max-width: 22ch;
  text-wrap: balance;
}

.section__description {
  max-width: 62ch;
  color: var(--color-muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: start;
}

.split__aside {
  position: relative;
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: #fff;
  color: #001;
  font-weight: 600;
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header[data-scrolled="true"] {
  background: rgba(10, 31, 68, 0.86);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--color-line);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.15);
}

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  z-index: 1;
  background: linear-gradient(90deg, var(--color-accent-orange), var(--color-accent-green));
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(100% - 48px, var(--site-width));
  margin-inline: auto;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
  line-height: 1;
}

.brand__mark {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--color-accent-orange);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
  transform: skewX(-8deg);
  box-shadow: 6px 0 0 rgba(255, 107, 53, 0.2);
}

.brand__mark::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  pointer-events: none;
}

.brand__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__text small {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-accent-green);
  letter-spacing: 0.28em;
}

.brand--footer .brand__text {
  color: var(--color-text);
}

.brand--footer .brand__text small {
  color: var(--color-accent-green);
}

.site-nav {
  display: block;
  width: auto;
  height: auto;
  background: transparent;
  transform: none;
  visibility: visible;
  box-shadow: none;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  padding: 8px 14px;
  color: rgba(233, 237, 242, 0.8);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: var(--color-accent-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.site-nav__link:hover {
  color: #fff;
}

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

.site-nav__link[aria-current="page"] {
  color: #fff;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 8px 0;
}

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

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle__icon {
  position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
}

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

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

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

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

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

@media (max-width: 860px) {
  :root {
    --header-height: 64px;
  }

  .site-header__inner {
    padding: 0 20px;
  }

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

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    width: min(22rem, 100%);
    height: calc(100dvh - var(--header-height));
    background: var(--color-primary-deep);
    transform: translateX(105%);
    visibility: hidden;
    transition: transform 0.35s var(--ease), visibility 0.35s var(--ease);
    box-shadow: -12px 0 24px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
    padding-bottom: 32px;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 24px;
  }

  .site-nav__link {
    display: block;
    padding: 14px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-line);
  }

  .site-nav__link::after {
    display: none;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  cursor: pointer;
}

.btn--primary {
  background: var(--color-accent-orange);
  color: #fff;
  box-shadow: 6px 6px 0 rgba(255, 107, 53, 0.2);
}

.btn--primary:hover {
  background: #e85a28;
  box-shadow: 3px 3px 0 rgba(255, 107, 53, 0.3);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-line-strong);
  color: #fff;
}

.btn--outline:hover {
  border-color: var(--color-accent-green);
  color: var(--color-accent-green);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent-green);
}

.btn--ghost:hover {
  color: #fff;
  background: rgba(0, 229, 160, 0.1);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 2px;
  padding: 24px;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), transform 0.3s var(--ease);
}

.card--outlined {
  background: transparent;
  border-color: var(--color-line-strong);
}

.card:hover {
  border-color: rgba(0, 229, 160, 0.4);
  background: rgba(0, 229, 160, 0.03);
}

.card--stat {
  position: relative;
  padding: 28px 24px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--color-line);
  border-radius: 2px;
  overflow: hidden;
}

.card--stat::before {
  content: "//";
  position: absolute;
  top: 10px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent-orange);
}

.stat-card__value {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  color: #fff;
  letter-spacing: -0.04em;
}

.stat-card__label {
  display: block;
  margin-top: 10px;
  color: var(--color-muted);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.media-frame {
  position: relative;
  min-height: 220px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-line);
  background: linear-gradient(130deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  overflow: hidden;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid var(--color-line);
  pointer-events: none;
}

.media-frame::after {
  content: attr(data-label);
  position: absolute;
  left: 16px;
  bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.frame-hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding-top: var(--header-height);
}

.frame-hero::before {
  content: "";
  position: absolute;
  top: -15%;
  right: -8%;
  width: 70%;
  height: 120%;
  background: linear-gradient(105deg, transparent 0%, transparent 45%, rgba(0, 229, 160, 0.06) 45%, rgba(0, 229, 160, 0.12) 100%);
  transform: skewX(-8deg);
  pointer-events: none;
}

.frame-hero__window {
  position: relative;
  margin-left: auto;
  width: min(100% - 64px, 1360px);
  border: 1px solid var(--color-line-strong);
  padding: clamp(40px, 7vw, 112px);
  background: rgba(8, 15, 29, 0.72);
  box-shadow: var(--shadow-panel);
}

.frame-hero__window::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 107, 53, 0.45);
  pointer-events: none;
}

.frame-hero__content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.frame-hero__title {
  font-size: clamp(2.6rem, 9vw, 7.5rem);
  letter-spacing: -0.01em;
  text-transform: uppercase;
  line-height: 0.92;
  margin-bottom: 1rem;
}

.frame-hero__subtitle {
  color: var(--color-muted);
  font-size: 1.1rem;
  max-width: 52ch;
  margin-top: 1.5rem;
  line-height: 1.8;
}

.editorial-toc {
  position: sticky;
  top: calc(var(--header-height) + 32px);
  border-left: 1px solid var(--color-accent-green);
  padding-left: 18px;
}

.editorial-toc__title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent-green);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.editorial-toc__list {
  margin-top: 12px;
}

.editorial-toc__link {
  display: block;
  padding: 8px 0 8px 12px;
  color: var(--color-muted);
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.editorial-toc__link:hover {
  color: #fff;
  border-left-color: var(--color-accent-orange);
}

.aside-note {
  border-top: 2px solid var(--color-accent-orange);
  padding-top: 12px;
  margin-top: 24px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.aside-note strong {
  color: var(--color-text);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: calc(var(--header-height) + 28px) 0 28px;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-line-strong);
}

.breadcrumbs__link {
  color: var(--color-muted);
  transition: color 0.2s var(--ease);
}

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

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

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

[data-scroll-spy] {
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

[data-scroll-spy][data-active] {
  border-left: 2px solid var(--color-accent-orange);
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.06), transparent 80%);
}

.site-footer {
  position: relative;
  background: #050D1D;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: clamp(64px, 9vw, 100px);
  margin-top: auto;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40%;
  height: 1px;
  background: var(--color-accent-orange);
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 20%;
  height: 1px;
  background: var(--color-accent-green);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(32px, 6vw, 80px);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.site-footer__slogan {
  color: var(--color-muted);
  font-size: 0.95rem;
  max-width: 36ch;
}

.site-footer__slogan--alt {
  color: var(--color-accent-green);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-green);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.site-footer__list {
  display: grid;
  gap: 10px;
}

.site-footer__link {
  color: var(--color-muted);
  font-size: 0.95rem;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

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

.site-footer__contact {
  display: grid;
  gap: 6px;
  margin-top: 28px;
  font-style: normal;
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.site-footer__contact span {
  display: block;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(48px, 7vw, 80px);
  padding-block: 24px 32px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 0.85rem;
}

.site-footer__legal span {
  white-space: normal;
}

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

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

@media (max-width: 560px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

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

  .site-footer__legal {
    flex-direction: column;
    text-align: center;
  }
}

@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;
  }

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

  .site-nav {
    transition: none;
  }
}