:root {
  --color-primary: #0a1f44;
  --color-primary-deep: #0d1b2a;
  --color-secondary: #1e3a5f;
  --color-accent: #4a6fa5;
  --color-neon: #00e5a0;
  --color-neon-bright: #00ff9d;
  --color-orange: #ff6b1a;
  --color-white: #ffffff;
  --color-muted: #a3b0c2;
  --color-line: #27415f;
  --gradient-bg: linear-gradient(135deg, #0a1f44 0%, #0d1b2a 100%);
  --font-display: "Poppins", "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Poppins", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-h: 72px;
  --radius: 12px;
  --container-w: 1200px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-10: 6rem;
  --transition: 180ms cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  background: var(--color-primary-deep);
  color: var(--color-white);
}

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

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
}

::selection {
  background: rgba(0, 229, 160, 0.25);
  color: #ffffff;
}

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

#main-content {
  flex: 1 0 auto;
  width: 100%;
}

.container {
  width: min(100% - 2rem, var(--container-w));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-6);
}

.grid {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}

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

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

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr);
  gap: var(--space-6);
  align-items: start;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.btn--primary {
  background: var(--color-neon);
  color: var(--color-primary-deep);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-neon-bright);
  box-shadow: 0 0 0 4px rgba(0, 229, 160, 0.25);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-neon);
  color: var(--color-neon);
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  font-size: 0.875rem;
  color: var(--color-muted);
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--color-accent);
}

.breadcrumbs a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--color-neon);
}

.card {
  background: rgba(30, 58, 95, 0.6);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-5);
}

.card--hover {
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card--hover:hover {
  border-color: rgba(0, 229, 160, 0.5);
  box-shadow: 0 8px 30px rgba(0, 229, 160, 0.08);
  transform: translateY(-2px);
}

.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--color-secondary);
  border: 1px solid var(--color-line);
}

.img-frame > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.05);
  transition: transform 400ms ease, filter 400ms ease;
}

.img-frame:hover > img {
  transform: scale(1.02);
  filter: saturate(1.05) contrast(1.02);
}

.img-frame--ratio-16x9 {
  aspect-ratio: 16 / 9;
}

.img-frame--ratio-4x3 {
  aspect-ratio: 4 / 3;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-neon);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--color-neon);
}

.display-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 6vw, 4.5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.lead {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 42rem;
}

.aside-note {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-muted);
  border-left: 2px solid var(--color-orange);
  padding-left: var(--space-3);
}

.data-num {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  font-weight: 700;
  color: var(--color-neon);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid rgba(0, 229, 160, 0.35);
  background: rgba(0, 229, 160, 0.08);
  color: var(--color-neon);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
}

.status-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.page-hero {
  padding: var(--space-10) 0 var(--space-6);
}

.page-hero__lead {
  max-width: 42rem;
  margin-top: var(--space-3);
}

.skip-link {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 2000;
  padding: var(--space-2) var(--space-3);
  background: var(--color-neon);
  color: var(--color-primary-deep);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  border-radius: 4px;
  transform: translateY(-300%);
  transition: transform var(--transition);
}

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

.site-header {
  position: relative;
  z-index: 1000;
  background: var(--gradient-bg);
}

.site-header__meta {
  background: rgba(13, 27, 42, 0.8);
  border-bottom: 1px solid rgba(74, 111, 165, 0.2);
}

.site-header__meta-inner {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 0.35rem var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-header__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

.site-header__meta-item--accent {
  color: var(--color-neon);
}

.site-header__meta-item--dim {
  color: rgba(163, 176, 194, 0.6);
}

.site-header__meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-neon);
}

.site-header__meta-dot--orange {
  background: var(--color-orange);
}

.site-header__bar {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  position: relative;
  gap: var(--space-4);
}

.site-header__bar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-neon) 0%, var(--color-neon) 24%, transparent 24%, transparent 56%, var(--color-orange) 56%, var(--color-orange) 80%, transparent 80%);
  opacity: 0.6;
  pointer-events: none;
}

.site-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.2em;
  text-decoration: none;
  white-space: nowrap;
}

.site-brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--color-neon);
  letter-spacing: -0.02em;
  transform: skew(-6deg);
}

.site-brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
}

.site-brand--footer .site-brand__mark,
.site-brand--footer .site-brand__name {
  font-size: 1.375rem;
}

.site-nav {
  display: flex;
  flex: 1;
  justify-content: flex-end;
  z-index: 50;
}

.site-nav__list {
  display: flex;
  gap: var(--space-5);
  padding: 0;
  margin: 0;
  list-style: none;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  display: inline-block;
  padding: 0.4rem 0;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  position: relative;
  transition: color var(--transition);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--color-neon);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-neon);
}

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

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

.site-nav__toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid rgba(163, 176, 194, 0.3);
  border-radius: 999px;
  background: transparent;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1;
  transition: border-color var(--transition), color var(--transition);
}

.site-nav__toggle:hover {
  border-color: var(--color-neon);
  color: var(--color-neon);
}

.site-nav__toggle-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: inherit;
}

.site-nav__toggle-icon {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.site-nav__toggle-icon span {
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon span:first-child {
  transform: translateY(5px) rotate(45deg);
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon span:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon span:last-child {
  transform: translateY(-5px) rotate(-45deg);
}

.site-footer {
  width: 100%;
  margin-top: auto;
  background: var(--color-primary-deep);
  border-top: 2px solid var(--color-neon);
}

.site-footer__inner {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: var(--space-8) var(--space-4) var(--space-6);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: var(--space-6);
  align-items: start;
}

.site-footer__brand {
  display: grid;
  gap: var(--space-3);
}

.site-footer__slogan {
  max-width: 32em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--color-muted);
}

.site-footer__nav,
.site-footer__aside {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.site-footer__heading {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-white);
  margin: 0;
}

.site-footer__list {
  display: grid;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
}

.site-footer__list a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color var(--transition), padding-left var(--transition);
}

.site-footer__list a:hover,
.site-footer__list a:focus-visible {
  color: var(--color-neon);
  padding-left: 4px;
}

.site-footer__contact {
  font-style: normal;
  margin-top: var(--space-4);
  font-size: 0.875rem;
  line-height: 1.9;
  color: var(--color-muted);
}

.site-footer__bottom {
  border-top: 1px solid rgba(74, 111, 165, 0.25);
}

.site-footer__bottom-inner {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.site-footer__copy,
.site-footer__icp {
  margin: 0;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-neon);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  z-index: 2001;
}

.back-to-top {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 1002;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  background: var(--color-neon);
  color: var(--color-primary-deep);
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), background var(--transition), box-shadow var(--transition);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--color-neon-bright);
  box-shadow: 0 0 0 4px rgba(0, 229, 160, 0.25);
}

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

  .split {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 767px) {
  .site-header__meta-item--dim {
    display: none;
  }

  .site-nav__toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    inset: calc(100% + var(--space-2)) var(--space-4) auto auto;
    display: flex;
    flex-direction: column;
    min-width: 220px;
    background: var(--color-primary);
    border: 1px solid rgba(0, 229, 160, 0.3);
    border-radius: var(--radius);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    padding: var(--space-3) var(--space-4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

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

  .site-nav__list {
    flex-direction: column;
    gap: var(--space-1);
  }

  .site-nav__link {
    display: block;
    padding: var(--space-3) var(--space-2);
    border-radius: 8px;
  }

  .site-nav__link:hover,
  .site-nav__link:focus-visible {
    background: rgba(0, 229, 160, 0.08);
  }

  .site-nav__link::after {
    left: var(--space-2);
    width: auto;
  }
}

@media (max-width: 600px) {
  .grid--split,
  .grid--thirds,
  .site-footer__inner {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}