:root {
  --bg-deep: #0B0F14;
  --bg-panel: #121820;
  --bg-float: #1A2430;
  --line: #273241;
  --line-soft: rgba(39, 50, 65, 0.7);
  --accent-green: #39FF14;
  --accent-blue: #00D4FF;
  --accent-gold: #FFD700;
  --text-main: #F0F4F8;
  --text-dim: #A8B3C0;
  --text-mute: #6B798A;
  --font-display: "Arial Narrow", "DIN Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(125deg, rgba(0, 212, 255, 0.045) 0%, transparent 22%, transparent 78%, rgba(57, 255, 20, 0.03) 100%),
    radial-gradient(circle at 85% 0%, rgba(0, 212, 255, 0.06), transparent 32%),
    var(--bg-deep);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.8;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote, dl, dd {
  margin: 0;
}

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

a {
  color: var(--accent-blue);
  text-decoration: none;
}

a:hover {
  color: var(--accent-green);
}

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

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

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

:focus-visible {
  outline: 3px solid var(--accent-green);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: rgba(57, 255, 20, 0.25);
  color: var(--text-main);
}

.container {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

@media (min-width: 720px) {
  .container {
    width: min(1120px, 100% - 4rem);
  }
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2000;
  display: inline-flex;
  align-items: center;
  background: var(--accent-green);
  color: #071109;
  padding: 0.7rem 1.1rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  border-radius: 2px;
  transform: translateY(-300%);
  transition: transform 0.2s ease;
}

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

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
  border-radius: 0 2px 2px 0;
  z-index: 3;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 15, 20, 0.92);
  border-bottom: 1px solid var(--line);
}

.header-top {
  background: linear-gradient(180deg, rgba(18, 24, 32, 0.55), rgba(11, 15, 20, 0.55));
  border-bottom: 1px solid var(--line-soft);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.header-top__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-blue) 100%);
  color: #06120a;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 76% 100%, 0 100%);
}

.brand:hover .brand__mark {
  filter: saturate(1.2) brightness(1.05);
}

.brand__text {
  display: grid;
  gap: 0.1rem;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--text-main);
  transition: color 0.2s ease;
}

.brand__tagline {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.header-top__meta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.28rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 99px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  background: rgba(18, 24, 32, 0.6);
}

.meta-pill__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(18, 24, 32, 0.8);
  color: var(--text-main);
  line-height: 1;
}

.nav-toggle:hover {
  border-color: rgba(57, 255, 20, 0.5);
  color: var(--accent-green);
}

.nav-toggle__box {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__box i {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__box i:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__box i:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__box i:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle__label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.header-nav {
  background: rgba(18, 24, 32, 0.94);
  border-bottom: 1px solid var(--line);
}

.header-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 54px;
}

.nav-links {
  display: flex;
}

.nav-links__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.nav-links__item {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.9rem;
  color: var(--text-dim);
  font-weight: 650;
  font-size: 0.92rem;
  letter-spacing: 0.05em;
  line-height: 1.2;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links__item::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.4rem;
  height: 2px;
  background: var(--accent-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav-links__item:hover {
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.06);
}

.nav-links__item[aria-current="page"],
.nav-links__item--active {
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.05);
}

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

.header-nav__note {
  max-width: 33%;
  text-align: right;
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  line-height: 1.5;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-top__meta {
    display: none;
  }

  .header-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease;
  }

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

  .header-nav__inner {
    display: block;
    min-height: 0;
    padding: 0.25rem 0 1.25rem;
  }

  .nav-links {
    display: block;
    width: 100%;
  }

  .nav-links__list {
    display: block;
  }

  .nav-links__item {
    display: flex;
    padding: 0.95rem 1.25rem;
    border-bottom: 1px solid rgba(39, 50, 65, 0.7);
  }

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

  .nav-links__item[aria-current="page"],
  .nav-links__item--active {
    background: rgba(57, 255, 20, 0.09);
  }

  .header-nav__note {
    max-width: none;
    text-align: left;
    padding: 0.9rem 1.25rem 0;
    margin-top: 0.6rem;
    border-top: 1px solid var(--line);
  }
}

.section {
  padding: clamp(4rem, 9vw, 7.5rem) 0;
}

.section--tight {
  padding: clamp(2rem, 5vw, 3rem) 0;
}

.section--wide {
  padding: clamp(5rem, 12vw, 9rem) 0;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--accent-green);
}

.section-eyebrow::before {
  content: "";
  width: 2.25rem;
  height: 1px;
  background: var(--accent-green);
}

.section-title {
  max-width: 16em;
  margin: 0.75rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.section-lead {
  max-width: 720px;
  margin-bottom: 2rem;
  color: var(--text-dim);
  font-size: 1.02rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  color: var(--accent-green);
  border-color: rgba(57, 255, 20, 0.5);
}

.btn-primary {
  background: var(--accent-green);
  border-color: var(--accent-green);
  color: #071109;
  font-weight: 800;
}

.btn-primary:hover {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #061018;
}

.btn-ghost {
  border-style: dashed;
  color: var(--text-main);
}

.btn-ghost:hover {
  border-style: solid;
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.05);
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: clamp(1.25rem, 4vw, 2rem);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.25);
}

.data-card {
  position: relative;
  background: linear-gradient(140deg, rgba(0, 212, 255, 0.05), rgba(57, 255, 20, 0.03)), var(--bg-float);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-green);
  padding: 1.5rem;
  overflow: hidden;
}

.data-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--accent-green);
  border-right: 2px solid var(--accent-green);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.tag--green {
  border-color: rgba(57, 255, 20, 0.4);
  color: var(--accent-green);
  background: rgba(57, 255, 20, 0.06);
}

.tag--blue {
  border-color: rgba(0, 212, 255, 0.4);
  color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.06);
}

.tag--gold {
  border-color: rgba(255, 215, 0, 0.4);
  color: var(--accent-gold);
  background: rgba(255, 215, 0, 0.06);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stat-cell {
  background: var(--bg-panel);
  padding: 1.2rem 1.25rem;
}

.stat-value {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.stat-key {
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

@media (max-width: 720px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }
}

.image-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, var(--bg-float), var(--bg-panel));
  border: 1px solid var(--line);
  aspect-ratio: 16 / 9;
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    115deg,
    transparent 25%,
    rgba(57, 255, 20, 0.04) 25%,
    rgba(57, 255, 20, 0.04) 30%,
    transparent 30%,
    transparent 70%,
    rgba(0, 212, 255, 0.05) 70%,
    rgba(0, 212, 255, 0.05) 75%,
    transparent 75%
  );
}

.image-frame::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 72px;
  height: 24px;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
  opacity: 0.7;
}

.image-frame--tall {
  aspect-ratio: 4 / 5;
}

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

@media (max-width: 640px) {
  .image-frame {
    aspect-ratio: 4 / 3;
  }

  .image-frame--tall {
    aspect-ratio: 4 / 5;
  }

  .image-frame--wide {
    aspect-ratio: 16 / 10;
  }
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 2rem;
  padding: 0;
  font-size: 0.78rem;
  color: var(--text-dim);
}

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

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--line);
}

.breadcrumbs a {
  color: var(--accent-blue);
}

.breadcrumbs a:hover {
  color: var(--accent-green);
}

.rich-text {
  max-width: 720px;
}

.rich-text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 2.4rem 0 0.8rem;
}

.rich-text p {
  margin-bottom: 1.2rem;
  color: var(--text-dim);
}

.rich-text li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-dim);
}

.rich-text li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.6rem;
  height: 0.6rem;
  background: var(--accent-green);
  transform: rotate(45deg);
}

.notice {
  border-left: 3px solid var(--accent-blue);
  background: rgba(0, 212, 255, 0.06);
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.site-footer {
  margin-top: clamp(5rem, 10vw, 8rem);
  background: linear-gradient(180deg, var(--bg-deep) 0%, #06090d 100%);
  border-top: 1px solid var(--line);
  color: var(--text-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1.1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(3rem, 7vw, 5rem) 0 2.5rem;
}

.footer-brand__link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-brand__mark {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  background: var(--accent-gold);
  color: #1a1400;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 75% 100%, 0 100%);
}

.footer-brand__name {
  color: var(--text-main);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.footer-brand__desc {
  max-width: 32rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.footer-cert {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-cert li {
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--accent-gold);
  border: 1px solid rgba(255, 215, 0, 0.35);
  background: rgba(255, 215, 0, 0.06);
  padding: 0.25rem 0.65rem;
  border-radius: 99px;
}

.footer-title {
  font-family: var(--font-display);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-mute);
  margin-bottom: 1rem;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 1.25rem;
  row-gap: 0.6rem;
}

.footer-links a {
  color: var(--text-dim);
  font-size: 0.92rem;
}

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

.footer-contact__row {
  margin-bottom: 0.55rem;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.footer-contact__note {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-mute);
  border-left: 2px solid var(--accent-blue);
  padding-left: 0.75rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--line);
  padding: 1.25rem 0;
  font-size: 0.78rem;
  color: var(--text-mute);
}

.footer-bottom .icp {
  font-family: var(--font-data);
  letter-spacing: 0.08em;
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-brand__desc {
    max-width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

@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;
  }

  .header-nav {
    transition: none;
  }
}