:root {
  --color-bg: #031411;
  --color-bg-panel: #08201B;
  --color-bg-panel-2: #0D2A23;
  --color-border: #215146;
  --color-accent: #63F7BD;
  --color-accent-dark: #18A978;
  --color-text: #E9FFF7;
  --color-text-muted: #91B8AB;
  --color-success: #73E59C;
  --color-warn: #FFB84D;
  --color-error: #FF6F67;
  --color-transparent: transparent;
  --color-bg-soft: rgba(3, 20, 17, 0.78);
  --color-bg-heavy: rgba(3, 20, 17, 0.94);
  --color-panel-glass: rgba(8, 32, 27, 0.88);
  --color-panel-deep: rgba(13, 42, 35, 0.94);
  --color-accent-03: rgba(99, 247, 189, 0.03);
  --color-accent-05: rgba(99, 247, 189, 0.05);
  --color-accent-08: rgba(99, 247, 189, 0.08);
  --color-accent-10: rgba(99, 247, 189, 0.1);
  --color-accent-14: rgba(99, 247, 189, 0.14);
  --color-accent-18: rgba(99, 247, 189, 0.18);
  --color-accent-24: rgba(99, 247, 189, 0.24);
  --color-accent-36: rgba(99, 247, 189, 0.36);
  --color-accent-48: rgba(99, 247, 189, 0.48);
  --color-accent-72: rgba(99, 247, 189, 0.72);
  --color-warn-10: rgba(255, 184, 77, 0.1);
  --color-warn-22: rgba(255, 184, 77, 0.22);
  --color-warn-35: rgba(255, 184, 77, 0.35);
  --color-error-12: rgba(255, 111, 103, 0.12);
  --color-success-12: rgba(115, 229, 156, 0.12);
  --color-shadow: rgba(0, 0, 0, 0.16);
  --color-blackout: rgba(1, 10, 8, 0.7);
  --font-display: "Inter", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Inter", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --radius-none: 0;
  --radius-xs: 3px;
  --radius-sm: 7px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --header-height: 82px;
  --content-width: 1320px;
  --reading-width: 820px;
  --gutter: clamp(16px, 4vw, 36px);
  --section-space: clamp(72px, 9vw, 132px);
  --ease-smooth: cubic-bezier(0.22, 0.8, 0.26, 1);
  --shadow-panel: 0 20px 54px var(--color-shadow);
  --shadow-glow: 0 0 34px var(--color-accent-24);
  --shadow-warn: 0 10px 30px var(--color-warn-22);
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  background: var(--color-bg);
}

html.nav-open {
  overflow: hidden;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main,
section,
article,
header,
footer,
nav,
div {
  min-width: 0;
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
}

img {
  display: block;
}

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

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

button,
a {
  -webkit-tap-highlight-color: var(--color-transparent);
}

button {
  cursor: pointer;
}

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

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

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
blockquote,
figure {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  font-family: var(--font-display);
  line-height: 1.16;
  text-wrap: balance;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(52px, 6vw, 72px);
  font-weight: 900;
  letter-spacing: -0.02em;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 850;
  letter-spacing: -0.018em;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(21px, 2.5vw, 28px);
  font-weight: 800;
}

h4 {
  margin-bottom: 10px;
  font-size: 18px;
}

p {
  margin-bottom: 1.1em;
}

strong {
  color: var(--color-text);
}

small {
  color: var(--color-text-muted);
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
}

code {
  max-width: 100%;
  padding: 0.12em 0.38em;
  border: 1px solid var(--color-accent-14);
  background: var(--color-accent-05);
  color: var(--color-accent);
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  margin: 24px 0;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  background: var(--color-panel-deep);
  color: var(--color-text-muted);
  line-height: 1.65;
  tab-size: 2;
  -webkit-overflow-scrolling: touch;
}

pre code {
  padding: 0;
  border: 0;
  background: var(--color-transparent);
  color: inherit;
  overflow-wrap: normal;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--color-bg-panel-2);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

td {
  background: var(--color-accent-03);
  color: var(--color-text-muted);
}

.wrap {
  width: min(100%, calc(var(--content-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reading-wrap {
  width: min(100%, calc(var(--reading-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
  overflow-x: clip;
}

.section-kicker,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.section-kicker::before,
.eyebrow::before {
  width: 34px;
  height: 1px;
  flex-shrink: 0;
  content: "";
  background: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent-48);
}

.title-nowrap {
  white-space: nowrap;
}

.muted {
  color: var(--color-text-muted);
}

.mono {
  font-family: var(--font-mono);
}

.accent-text {
  color: var(--color-accent);
}

.gradient-text {
  background: linear-gradient(92deg, var(--color-accent), var(--color-text), var(--color-accent-dark));
  background-clip: text;
  color: var(--color-transparent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: var(--color-transparent);
}

.btn,
.cta {
  min-height: 48px;
  max-width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  padding: 10px 21px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-glass);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

.btn svg,
.cta svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.btn:hover,
.cta:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent-48);
  color: var(--color-accent);
}

.btn-primary,
.cta-primary {
  border-color: var(--color-warn);
  background: var(--color-warn);
  color: var(--color-bg);
  box-shadow: var(--shadow-warn);
}

.btn-primary:hover,
.cta-primary:hover {
  border-color: var(--color-text);
  background: var(--color-text);
  color: var(--color-bg);
}

.btn-quiet {
  background: var(--color-transparent);
}

.btn-danger {
  border-color: var(--color-error);
  background: var(--color-error-12);
  color: var(--color-error);
}

.btn[disabled],
.btn.is-disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none;
}

.button-row,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.panel,
.card {
  min-width: 0;
  border: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, var(--color-accent-05), var(--color-transparent)),
    var(--color-bg-panel);
  box-shadow: var(--shadow-panel);
}

.panel {
  padding: clamp(22px, 4vw, 42px);
}

.cut-panel {
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.card {
  padding: 24px;
  transition:
    transform 180ms ease,
    border-color 180ms ease;
}

.card:hover {
  border-color: var(--color-accent-48);
  transform: translateY(-3px);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.status-dot {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-success);
  box-shadow: 0 0 12px var(--color-accent-72);
}

.fact-row,
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.fact-chip,
.chip {
  min-height: 28px;
  max-width: 100%;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  overflow: hidden;
  border: 1px solid var(--color-accent-18);
  border-radius: var(--radius-pill);
  background: var(--color-accent-05);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  overflow-wrap: anywhere;
}

.fact-chip::before {
  width: 5px;
  height: 5px;
  flex-shrink: 0;
  content: "";
  border-radius: var(--radius-pill);
  background: var(--color-success);
  box-shadow: 0 0 10px var(--color-accent-72);
}

.site-header {
  position: relative;
  z-index: 80;
  height: var(--header-height);
  border-bottom: 1px solid var(--color-accent-10);
  background: linear-gradient(180deg, var(--color-bg-heavy), var(--color-bg-soft));
  backdrop-filter: blur(16px);
}

.site-header.is-overlay {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
}

.nav-shell {
  width: min(100%, calc(var(--content-width) + (var(--gutter) * 2)));
  height: 100%;
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand-logo {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.brand-copy {
  min-width: 0;
  display: grid;
  gap: 1px;
}

.brand-name {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-domain {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.desktop-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--color-accent-10);
  border-radius: var(--radius-pill);
  background: var(--color-accent-03);
}

.desktop-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 8px 13px;
  border: 1px solid var(--color-transparent);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.desktop-nav a:hover {
  background: var(--color-accent-05);
  color: var(--color-text);
}

.desktop-nav a[aria-current="page"] {
  border-color: var(--color-accent-24);
  background: var(--color-accent-14);
  color: var(--color-accent);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.language-menu {
  position: relative;
}

.language-button {
  min-height: 42px;
  min-width: 108px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-glass);
  color: var(--color-text-muted);
  font-size: 12px;
}

.language-popover {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 180px;
  padding: 6px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-panel);
  box-shadow: var(--shadow-panel);
}

.language-popover[hidden] {
  display: none;
}

.language-popover a {
  min-height: 42px;
  display: flex;
  align-items: center;
  padding: 8px 11px;
  color: var(--color-text-muted);
  font-size: 13px;
}

.language-popover a:hover,
.language-popover a[aria-current="true"] {
  background: var(--color-accent-10);
  color: var(--color-accent);
}

.nav-toggle {
  min-width: 44px;
  min-height: 44px;
  display: none;
  place-items: center;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-bg-panel);
  color: var(--color-text);
}

.nav-toggle-lines,
.nav-toggle-lines::before,
.nav-toggle-lines::after {
  width: 20px;
  height: 2px;
  display: block;
  background: currentColor;
}

.nav-toggle-lines {
  position: relative;
}

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

.nav-toggle-lines::before {
  top: -6px;
}

.nav-toggle-lines::after {
  top: 6px;
}

.mobile-drawer {
  display: none;
}

.site-footer {
  position: relative;
  overflow-x: clip;
  border-top: 1px solid var(--color-border);
  background:
    linear-gradient(145deg, var(--color-accent-05), var(--color-transparent) 38%),
    var(--color-bg-panel);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1.3fr 0.9fr;
  gap: 42px;
  padding-top: 64px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.footer-brand img {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.footer-brand p {
  margin-top: 10px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

.footer-title {
  margin-bottom: 15px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 9px;
}

.footer-links a {
  width: fit-content;
  max-width: 100%;
  color: var(--color-text-muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.footer-links a:hover {
  color: var(--color-warn);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 20px;
  padding-bottom: 24px;
  border-top: 1px solid var(--color-accent-10);
  color: var(--color-text-muted);
  font-size: 12px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 680ms var(--ease-smooth),
    transform 680ms var(--ease-smooth);
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

.prose {
  min-width: 0;
  color: var(--color-text-muted);
}

.prose h2 {
  margin-top: 2em;
}

.prose h3 {
  margin-top: 1.65em;
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-36);
  text-underline-offset: 0.2em;
}

.prose li {
  margin-bottom: 0.55em;
}

.prose > .data-table {
  max-width: 100%;
  min-width: 0;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tilt,
.tilt-card {
  transform: rotate(-0.35deg);
}

@media (max-width: 1120px) {
  .desktop-nav a {
    padding-inline: 9px;
  }

  .brand-domain {
    display: none;
  }

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

@media (max-width: 900px) {
  :root {
    --header-height: 70px;
  }

  h1 {
    font-size: clamp(36px, 7vw, 40px);
  }

  .desktop-nav,
  .language-menu {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .nav-toggle {
    display: grid;
  }

  .mobile-drawer {
    position: fixed;
    z-index: 90;
    top: var(--header-height);
    right: 0;
    left: 0;
    max-height: calc(100dvh - var(--header-height));
    padding: 12px var(--gutter) 24px;
    overflow-y: auto;
    overscroll-behavior: contain;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-panel);
    box-shadow: var(--shadow-panel);
  }

  .mobile-drawer.is-open {
    display: block;
  }

  .mobile-drawer a {
    width: 100%;
    min-height: 48px;
    display: flex;
    align-items: center;
    padding: 11px 12px;
    border-bottom: 1px solid var(--color-accent-10);
    color: var(--color-text-muted);
  }

  .mobile-drawer a[aria-current="page"],
  .mobile-drawer a[aria-current="true"] {
    background: var(--color-accent-10);
    color: var(--color-accent);
  }

  .mobile-language-title {
    margin: 22px 12px 6px;
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.12em;
  }

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

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
    --section-space: 68px;
  }

  body {
    overflow-x: clip;
  }

  h1 {
    font-size: clamp(28px, 9.8vw, 40px);
    line-height: 1.12;
    letter-spacing: -0.018em;
  }

  h2 {
    font-size: clamp(28px, 8vw, 36px);
  }

  .brand-name {
    font-size: 15px;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .button-row,
  .cta-row {
    align-items: stretch;
  }

  .button-row .btn,
  .cta-row .cta {
    width: 100%;
  }

  .panel,
  .card {
    padding: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .tilt,
  .tilt-card,
  [class*="tilt"] {
    transform: none;
  }

  th,
  td {
    padding: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}