:root {
  --ink: #071B2B;
  --harbor: #0B3A5C;
  --signal: #145C8A;
  --orange: #FF5A1F;
  --ember: #FF8A3D;
  --mint: #6FE7C0;
  --paper: #F3EBDD;
  --paper-white: #FBF6EC;
  --text: #1C1512;
  --steel: #8798A6;
  --alert: #E5484D;
  --line-dark: rgba(243, 235, 221, 0.16);
  --line-light: rgba(28, 21, 18, 0.2);
  --font-display: "Archivo Black", "Arial Black", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-editorial: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", Georgia, serif;
  --font-body: Inter, "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --header-h: 76px;
  --radius-chip: 999px;
}

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

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

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
  word-break: break-word;
  line-break: strict;
}

body.nav-open {
  overflow: hidden;
}

::selection {
  background: var(--orange);
  color: var(--ink);
}

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

ul,
ol {
  padding: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.06;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(44px, 7vw, 96px);
}

h2 {
  font-size: clamp(28px, 3.4vw, 48px);
}

h3 {
  font-size: clamp(20px, 2.2vw, 24px);
}

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

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

button {
  color: inherit;
}

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

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

.page-shell {
  width: min(calc(100% - 32px), 1360px);
  margin-inline: auto;
}

.reading-column {
  width: min(calc(100% - 32px), 760px);
  margin-inline: auto;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
  align-items: start;
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 2px solid var(--ink);
  background: var(--paper-white);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.btn:hover {
  border-color: var(--orange);
  color: var(--orange);
  transform: translateY(-2px);
}

.btn--primary {
  border-color: var(--orange);
  background: var(--orange);
  color: var(--ink);
}

.btn--primary:hover {
  border-color: var(--mint);
  background: var(--mint);
  color: var(--ink);
}

.btn--ghost {
  border-color: currentColor;
  background: transparent;
  color: var(--paper);
}

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

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--steel);
}

.breadcrumbs a {
  border-bottom: 1px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}

.breadcrumbs a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

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

.mono-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.data-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-chip);
  background: var(--mint);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}

.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border: 2px solid var(--ink);
  background: var(--harbor);
  color: var(--paper);
  isolation: isolate;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(111, 231, 192, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111, 231, 192, 0.16) 1px, transparent 1px);
  background-size: 22px 22px;
  mix-blend-mode: screen;
  pointer-events: none;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg, transparent 44%, rgba(7, 27, 43, 0.62));
  pointer-events: none;
}

.media-frame img {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame[data-ratio="wide"] { aspect-ratio: 16 / 9; }
.media-frame[data-ratio="square"] { aspect-ratio: 1; }
.media-frame[data-ratio="portrait"] { aspect-ratio: 4 / 5; }

.media-frame--slant {
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
}

.media-frame--pixel img {
  image-rendering: pixelated;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  overflow: visible;
  background: var(--ink);
  color: var(--paper);
  border-bottom: 1px solid var(--line-dark);
}

.site-header[data-scrolled] {
  border-bottom-color: var(--steel);
  box-shadow: 0 1px 0 rgba(135, 152, 166, 0.28);
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border: 2px solid var(--ink);
  background: var(--mint);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transform: translateY(-160%);
  transition: transform 150ms ease;
}

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

.header-slant {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(100deg, var(--harbor) 0%, var(--harbor) 44%, var(--ink) 78%);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 0 100%);
  pointer-events: none;
}

.header-shell {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(calc(100% - 32px), 1440px);
  min-height: var(--header-h);
  margin-inline: auto;
}

.brand {
  display: flex;
  flex: 0 1 auto;
  align-items: center;
  gap: 8px;
  min-width: 0;
  color: var(--paper);
}

.brand-word {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.2vw, 2rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--paper);
}

.brand-cn {
  font-family: var(--font-display);
  font-size: clamp(0.86rem, 1.2vw, 1.05rem);
  line-height: 1;
  color: var(--mint);
}

.brand-kicker {
  padding-left: 9px;
  border-left: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.3;
  letter-spacing: 0.14em;
  color: var(--steel);
  white-space: nowrap;
}

.brand-steps {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 4px;
  padding-left: 9px;
  border-left: 1px solid var(--line-dark);
}

.status-light {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 4px 5px;
  border: 1px solid rgba(111, 231, 192, 0.32);
  background: rgba(111, 231, 192, 0.07);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--paper);
  white-space: nowrap;
}

.status-light b {
  color: var(--mint);
  font-weight: 700;
}

.status-light:first-child b {
  color: var(--orange);
}

.nav-cluster {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 14px;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-eyebrow {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.35vw, 20px);
  list-style: none;
}

.nav-list li {
  min-width: 0;
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 9px 0;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  transition: color 150ms ease;
}

.nav-list a::after,
.footer-links a::after,
.footer-legal a::after,
.footer-route::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 150ms ease;
  pointer-events: none;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--orange);
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after {
  transform: scaleX(1);
}

.nav-list a[aria-current="page"] {
  color: var(--orange);
}

.nav-list a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--mint);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border: 2px solid var(--orange);
  background: var(--orange);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.header-cta:hover {
  border-color: var(--mint);
  background: var(--mint);
  transform: translateY(-2px);
}

.header-cta-long {
  display: inline;
}

.header-cta-short {
  display: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 10px;
  border: 2px solid rgba(243, 235, 221, 0.58);
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 150ms ease, color 150ms ease, background-color 150ms ease;
}

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

.nav-toggle-icon {
  position: relative;
  display: inline-flex;
  width: 18px;
  height: 12px;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle-icon i {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 150ms ease;
}

.site-header[data-open] .nav-toggle {
  border-color: var(--orange);
  background: var(--orange);
  color: var(--ink);
}

.site-header[data-open] .nav-toggle-icon i:first-child {
  transform: translateY(5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-icon i:last-child {
  transform: translateY(-5px) rotate(-45deg);
}

.nav-toggle-label {
  display: inline-block;
}

.site-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  z-index: 4;
  height: 3px;
  background: transparent;
  pointer-events: none;
}

.site-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--mint), var(--orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 80ms linear;
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  border-top: 1px solid var(--line-dark);
}

.footer-slant {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(105deg, var(--harbor) 0%, var(--harbor) 36%, var(--ink) 70%);
  clip-path: polygon(0 0, 100% 0, 100% 76%, 0 100%);
  pointer-events: none;
}

.footer-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.35fr 0.8fr 1.1fr;
  gap: clamp(28px, 5vw, 80px);
  width: min(calc(100% - 32px), 1360px);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) 0 clamp(28px, 4vw, 48px);
}

.footer-brand {
  min-width: 0;
}

.footer-logo {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--paper);
  border-bottom: 2px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}

.footer-logo span {
  color: var(--mint);
}

.footer-logo:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.footer-tagline {
  max-width: 34ch;
  margin-top: 16px;
  color: rgba(243, 235, 221, 0.78);
  font-size: 15px;
  line-height: 1.75;
}

.footer-signal {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.signal-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(111, 231, 192, 0.12);
}

.footer-col {
  min-width: 0;
}

.footer-heading {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(111, 231, 192, 0.28);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 9px;
  list-style: none;
}

.footer-links a {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  color: var(--paper);
  font-size: 14px;
  transition: color 150ms ease;
}

.footer-links a:hover,
.footer-links a:focus-visible,
.footer-legal a:hover,
.footer-legal a:focus-visible,
.footer-route:hover,
.footer-route:focus-visible {
  color: var(--orange);
}

.footer-links a:hover::after,
.footer-links a:focus-visible::after,
.footer-legal a:hover::after,
.footer-legal a:focus-visible::after,
.footer-route:hover::after,
.footer-route:focus-visible::after {
  transform: scaleX(1);
}

.footer-links a[aria-current="page"],
.footer-legal a[aria-current="page"] {
  color: var(--mint);
}

.footer-contact {
  align-self: start;
}

.footer-contact-list {
  display: grid;
  gap: 12px;
  list-style: none;
  font-size: 14px;
}

.footer-contact-list li {
  display: grid;
  grid-template-columns: 5.2em minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
}

.contact-value {
  min-width: 0;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.footer-route {
  position: relative;
  display: inline-block;
  width: fit-content;
  margin-top: 2px;
  padding-bottom: 2px;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: color 150ms ease;
}

.footer-base {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 32px), 1360px);
  margin-inline: auto;
  padding: 18px 0 30px;
  border-top: 1px solid var(--line-dark);
}

.footer-base-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 12px;
}

.footer-legal a {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  color: var(--paper);
  transition: color 150ms ease;
}

.footer-note {
  max-width: 86ch;
  margin-top: 12px;
  color: var(--steel);
  font-size: 12px;
  line-height: 1.7;
}

@media (max-width: 1180px) {
  .brand-kicker {
    display: none;
  }

  .nav-list {
    gap: 10px;
  }

  .nav-list a {
    font-size: 12px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 64px;
  }

  .header-shell {
    gap: 10px;
    width: min(calc(100% - 24px), 1440px);
  }

  .brand {
    gap: 6px;
  }

  .brand-steps {
    margin-left: 2px;
    padding-left: 6px;
  }

  .status-light {
    padding: 3px 4px;
    font-size: 8px;
  }

  .nav-cluster {
    gap: 6px;
  }

  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 100;
  }

  .header-cta {
    min-height: 38px;
    padding: 0 9px;
    font-size: 11px;
  }

  .header-cta-long {
    display: none;
  }

  .header-cta-short {
    display: inline;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 0;
    width: 100%;
    min-height: 100dvh;
    padding: calc(var(--header-h) + 26px) 20px 32px;
    overflow-y: auto;
    background: var(--ink);
    color: var(--paper);
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-102%);
    transition: transform 180ms ease, opacity 180ms ease, visibility 180ms ease;
  }

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

  .nav-eyebrow {
    display: block;
    width: 100%;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line-dark);
    color: var(--mint);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.2em;
  }

  .nav-list {
    display: grid;
    width: 100%;
    gap: 0;
    counter-reset: nav-count;
  }

  .nav-list li {
    display: grid;
    grid-template-columns: 3rem minmax(0, 1fr);
    align-items: center;
    border-bottom: 1px solid var(--line-dark);
    counter-increment: nav-count;
  }

  .nav-list li::before {
    content: "0" counter(nav-count);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--orange);
  }

  .nav-list a {
    display: block;
    width: 100%;
    padding: 13px 0;
    color: var(--paper);
    font-family: var(--font-display);
    font-size: clamp(1.55rem, 6vw, 2.25rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    white-space: normal;
  }

  .nav-list a::after {
    display: none;
  }

  .nav-list a[aria-current="page"] {
    color: var(--mint);
  }

  .nav-list a:hover,
  .nav-list a:focus-visible {
    color: var(--orange);
  }

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

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

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

@media (max-width: 640px) {
  .span-3,
  .span-4,
  .span-5,
  .span-6 {
    grid-column: span 12;
  }

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

  .footer-brand,
  .footer-contact {
    grid-column: auto;
  }

  .footer-base-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .footer-contact-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .contact-label {
    font-size: 9px;
  }
}

@media (max-width: 460px) {
  .brand-cn {
    display: none;
  }

  .brand-steps {
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
  }

  .brand-word {
    font-size: 1.35rem;
  }

  .status-light {
    padding: 3px;
    font-size: 8px;
    letter-spacing: 0.04em;
  }

  .header-cta,
  .nav-toggle {
    min-height: 36px;
  }

  .footer-tagline {
    font-size: 14px;
  }
}

@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;
  }

  .btn:hover,
  .header-cta:hover {
    transform: none;
  }

  .site-nav {
    transition: none;
  }
}