:root {
  --c-primary: #0A1E3F;
  --c-primary-light: #1A3A6B;
  --c-accent: #FF6A00;
  --c-accent-hover: #FF7D1A;
  --c-gold: #FFD700;
  --c-silver: #C0C0C0;
  --c-text: #FFFFFF;
  --c-text-dim: #B0C4DE;
  --c-grid: #2A4A7F;
  --font-display: Impact, 'Anton', sans-serif;
  --font-body: 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-data: 'Consolas', 'Courier New', monospace;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;
  --radius-sm: 4px;
  --radius-md: 10px;
  --container-width: 1440px;
  --header-h: 84px;
}

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

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

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

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

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

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

body {
  min-height: 100vh;
  background-color: var(--c-primary);
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

button {
  color: inherit;
}

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

#main-content {
  scroll-margin-top: calc(var(--header-h) + 24px);
  min-height: 60vh;
}

main:focus {
  outline: none;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--c-accent);
  color: var(--c-text);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-200%);
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
  opacity: 1;
}

.container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.container-narrow {
  max-width: 920px;
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.section {
  padding-block: clamp(48px, 8vw, 96px);
}

.section--alt {
  background: linear-gradient(180deg, var(--c-primary) 0%, #0D2B57 100%);
  border-block: 1px solid var(--c-grid);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--c-accent);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--c-accent);
}

.section-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--c-text);
}

.section-lead {
  max-width: 760px;
  margin-top: 12px;
  color: var(--c-text-dim);
  font-size: 1.05rem;
  line-height: 1.8;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 30, 63, 0.96);
  border-bottom: 1px solid var(--c-grid);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 0%, var(--c-accent) 20%, var(--c-gold) 80%, transparent 100%);
  opacity: 0.7;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  pointer-events: none;
  background: var(--c-accent);
  opacity: 0.85;
}

.header-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  max-width: 1600px;
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
  border-left: 1px solid rgba(42, 74, 127, 0.5);
  border-right: 1px solid rgba(42, 74, 127, 0.5);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--c-text);
  text-decoration: none;
}

.brand-mark {
  position: relative;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--c-silver);
  border-radius: 12px;
  background: linear-gradient(135deg, var(--c-primary-light), var(--c-primary));
  transform: rotate(-8deg);
  transition: transform 0.2s ease;
}

.brand-link:hover .brand-mark {
  transform: rotate(-8deg) scale(1.05);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 2px solid var(--c-accent);
  border-radius: 50%;
  border-left-color: transparent;
  transform: rotate(20deg);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 6px;
  right: 5px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 8px rgba(255, 215, 0, 0.8);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.brand-tagline {
  color: var(--c-silver);
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-nav {
  justify-self: center;
  min-width: 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, 1vw, 20px);
}

.nav-link {
  position: relative;
  display: block;
  padding: 10px 6px;
  color: var(--c-text);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-accent);
}

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

.nav-link[aria-current="page"] {
  color: var(--c-accent);
}

.header-meta {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--c-accent);
  color: var(--c-text);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  line-height: 1;
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn-cta:hover,
.btn-cta:focus-visible {
  background: var(--c-gold);
  color: var(--c-primary);
  transform: translateY(-2px);
}

.btn-cta-arrow {
  font-family: var(--font-data);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--c-grid);
  border-radius: 6px;
  background: rgba(26, 58, 107, 0.4);
  color: var(--c-text);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

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

.nav-toggle-box {
  display: grid;
  gap: 5px;
  width: 18px;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--c-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.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);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 5;
  width: 100%;
  height: 2px;
  pointer-events: none;
}

.scroll-progress::after {
  content: "";
  display: block;
  width: var(--scroll-progress, 0%);
  height: 100%;
  background: linear-gradient(90deg, var(--c-accent), var(--c-gold));
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--c-primary) 0%, #071528 100%);
  color: var(--c-text);
  border-top: 1px solid var(--c-grid);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(rgba(42, 74, 127, 0.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 74, 127, 0.25) 1px, transparent 1px);
  background-size: 32px 32px, 64px 64px, 64px 64px;
  opacity: 0.5;
}

.site-footer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-gold) 40%, var(--c-silver) 100%);
}

.footer-frame {
  position: relative;
  max-width: 1600px;
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) clamp(16px, 4vw, 48px) 24px;
  border-left: 1px solid rgba(42, 74, 127, 0.5);
  border-right: 1px solid rgba(42, 74, 127, 0.5);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: clamp(24px, 4vw, 56px);
}

.footer-brand-block {
  display: grid;
  align-content: start;
  gap: 20px;
}

.brand-link--footer {
  margin-bottom: 4px;
}

.footer-statement {
  max-width: 36em;
  padding-left: 14px;
  border-left: 2px solid var(--c-accent);
  color: var(--c-text-dim);
  font-size: 14px;
  line-height: 1.8;
}

.footer-nav {
  display: grid;
  align-content: start;
  gap: 12px;
}

.footer-heading {
  margin-bottom: 8px;
  color: var(--c-silver);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  position: relative;
  color: var(--c-text-dim);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 50%;
  width: 4px;
  height: 4px;
  background: var(--c-accent);
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--c-text);
  padding-left: 4px;
}

.footer-links a:hover::before,
.footer-links a:focus-visible::before {
  opacity: 1;
}

.footer-contact {
  display: grid;
  align-content: start;
  gap: 12px;
}

.footer-contact-list {
  display: grid;
  gap: 12px;
}

.footer-contact-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--c-text);
  font-size: 14px;
  line-height: 1.5;
}

.footer-contact-label {
  flex: 0 0 64px;
  color: var(--c-silver);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--c-grid);
  color: var(--c-text-dim);
  font-size: 13px;
}

.footer-copy,
.footer-icp,
.footer-domain {
  white-space: nowrap;
}

.footer-domain {
  font-family: var(--font-data);
  letter-spacing: 0.02em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--c-grid);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--c-text);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-text);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--c-accent-hover);
  border-color: var(--c-accent-hover);
}

.btn-outline {
  border-color: var(--c-silver);
  color: var(--c-text);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.btn-ghost {
  border-color: transparent;
  color: var(--c-text-dim);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(255, 255, 255, 0.06);
  color: var(--c-text);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  padding: 0;
  list-style: none;
  color: var(--c-text-dim);
  font-size: 14px;
}

.breadcrumb a {
  color: var(--c-text-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-accent);
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-inline: 8px;
  color: var(--c-grid);
  font-family: var(--font-data);
}

.breadcrumb [aria-current="page"] {
  color: var(--c-silver);
}

.lead {
  color: var(--c-text);
  font-size: 1.15rem;
  line-height: 1.8;
}

.body-copy {
  max-width: 760px;
  color: var(--c-text);
  font-size: 1rem;
  line-height: 1.9;
}

.body-copy p + p {
  margin-top: 1em;
}

.body-copy strong {
  color: var(--c-gold);
}

.display-word {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  line-height: 0.85;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: transparent;
  -webkit-text-stroke: 1px var(--c-grid);
  user-select: none;
}

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

.gold-text {
  color: var(--c-gold);
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(240px, 340px) 1fr;
  gap: clamp(24px, 5vw, 80px);
  align-items: start;
}

.split-aside {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.split-main {
  min-width: 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.stat-card {
  padding: 24px;
  border: 1px solid var(--c-grid);
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, var(--c-primary-light), rgba(10, 30, 63, 0.8));
}

.stat-value {
  color: var(--c-accent);
  font-family: var(--font-data);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.1;
}

.stat-label {
  margin-top: 8px;
  color: var(--c-text-dim);
  font-size: 14px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  padding: 24px;
  border: 1px solid rgba(42, 74, 127, 0.8);
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, var(--c-primary-light), rgba(10, 30, 63, 0.8));
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  border-color: var(--c-accent);
}

.card-title {
  margin-bottom: 8px;
  color: var(--c-text);
  font-size: 1.2rem;
}

.card-text {
  color: var(--c-text-dim);
  font-size: 0.95rem;
  line-height: 1.7;
}

.image-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--c-grid);
  background:
    linear-gradient(135deg, var(--c-primary-light) 0%, var(--c-primary) 55%, #071528 100%);
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 74, 127, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 74, 127, 0.35) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
  pointer-events: none;
}

.image-frame::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 40%;
  height: 40%;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 106, 0, 0.45) 100%);
  opacity: 0.6;
  pointer-events: none;
}

.image-frame img {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.image-frame--tall {
  aspect-ratio: 3 / 4;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: 0.95rem;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--c-grid);
  text-align: left;
}

.data-table th {
  background: rgba(26, 58, 107, 0.3);
  color: var(--c-silver);
  font-family: var(--font-body);
  letter-spacing: 0.05em;
}

.data-table td {
  color: var(--c-text);
}

.data-table .is-highlight {
  color: var(--c-accent);
  font-weight: 700;
}

.path-list {
  display: grid;
  gap: 20px;
}

.path-step {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  padding-left: 20px;
  border-left: 1px solid var(--c-grid);
}

.path-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 4px;
  width: 10px;
  height: 10px;
  background: var(--c-accent);
  transform: rotate(45deg);
}

.path-marker {
  color: var(--c-accent);
  font-family: var(--font-data);
  font-weight: 700;
}

.path-content {
  min-width: 0;
}

.path-content h3 {
  margin-bottom: 4px;
  color: var(--c-text);
}

.path-content p {
  color: var(--c-text-dim);
}

.notice {
  padding: 16px 20px;
  border-left: 4px solid var(--c-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(26, 58, 107, 0.4);
  color: var(--c-text-dim);
}

.notice--gold {
  border-left-color: var(--c-gold);
}

@media (max-width: 1120px) {
  .header-inner {
    grid-template-columns: 1fr auto;
    min-height: 68px;
  }

  .site-nav {
    grid-column: 1 / -1;
    justify-self: stretch;
    display: none;
    margin-top: 6px;
    padding-block: 8px;
    border-top: 1px solid var(--c-grid);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    padding: 12px 8px;
    border-bottom: 1px solid rgba(42, 74, 127, 0.35);
  }

  .nav-link::after {
    display: none;
  }

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

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

  .split-layout {
    grid-template-columns: 1fr;
  }

  .split-aside {
    position: static;
  }

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

@media (max-width: 640px) {
  .header-inner {
    gap: 10px;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .brand-tagline {
    font-size: 9px;
    letter-spacing: 0.1em;
  }

  .brand-mark {
    flex-basis: 36px;
    width: 36px;
    height: 36px;
  }

  .btn-cta {
    padding: 8px 12px;
    clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  }

  .btn-cta-arrow {
    display: none;
  }

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

  .footer-bottom {
    justify-content: flex-start;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}