:root {
  --color-bg-dark: #061A12;
  --color-bg-mid: #0A2A1E;
  --color-bg-card: #0B3D2E;
  --color-bg-light: #145A42;
  --color-accent: #FFC107;
  --color-data: #39FF14;
  --color-text: #F2F5F4;
  --color-text-secondary: #A8B5AF;
  --color-border: #2A5A4A;
  --color-warn: #FF6B35;
  --font-heading: "Archivo Black", "Arial Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --container-max: 1440px;
  --header-h-mobile: 64px;
  --gutters: clamp(1rem, 4vw, 3.5rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg-dark);
  background-image:
    radial-gradient(circle at 78% 12%, rgba(57, 255, 20, 0.07), transparent 32%),
    radial-gradient(circle at 22% 88%, rgba(255, 193, 7, 0.05), transparent 28%),
    repeating-linear-gradient(0deg, rgba(57, 255, 20, 0.022) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(90deg, rgba(57, 255, 20, 0.022) 0 1px, transparent 1px 4px);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  line-height: 1.2;
  color: var(--color-text);
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

[hidden] {
  display: none !important;
}

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

.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutters);
}

.main-content {
  min-height: 60vh;
}

#main-content {
  outline: none;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  z-index: 200;
  padding: 0.7rem 1.2rem;
  background: var(--color-accent);
  color: var(--color-bg-dark);
  font-family: var(--font-body);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0.75rem;
  color: var(--color-bg-dark);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 26, 18, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header__bar {
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

.site-header__tape {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.3rem var(--gutters);
  background: var(--color-bg-mid);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
}

.tape__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.tape__item::before {
  content: "//";
  color: var(--color-data);
  font-weight: 700;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
  min-height: var(--header-h-mobile);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--color-text);
}

.site-brand:hover {
  color: var(--color-text);
}

.site-brand__glyph {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  background: var(--color-accent);
  color: var(--color-bg-dark);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.site-brand__text {
  display: inline-flex;
  flex-direction: column;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  line-height: 1.1;
  letter-spacing: 0.05em;
}

.site-brand__tagline {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-data);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid transparent;
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  color: var(--color-text);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--color-accent);
  border-color: var(--color-border);
}

.site-nav__num {
  font-family: var(--font-data);
  font-size: 0.7rem;
  color: var(--color-data);
}

.site-nav__link[aria-current="page"] {
  background: var(--color-bg-card);
  border-color: var(--color-border);
  color: var(--color-accent);
}

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

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.3rem;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  color: var(--color-text);
  background: var(--color-bg-light);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg-dark);
  font-weight: 700;
}

.btn--primary:hover {
  background: var(--color-data);
  color: var(--color-bg-dark);
}

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

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.site-header__cta {
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.site-header__cta::after {
  content: "↗";
  margin-left: 0.4rem;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 0.55rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
}

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

.nav-toggle__bars {
  position: relative;
  display: inline-block;
  width: 1.3rem;
  height: 1px;
  background: var(--color-accent);
  transition: background-color 0.2s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transition: transform 0.25s ease, top 0.25s ease;
}

.nav-toggle__bars::before {
  top: -0.4rem;
}

.nav-toggle__bars::after {
  top: 0.4rem;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: rotate(-45deg);
  top: 0;
}

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--color-data);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  z-index: 5;
}

.site-footer {
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-border);
}

.site-footer::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0 62%, var(--color-data) 62% 100%);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 0.9fr);
  gap: 3rem 2.5rem;
  padding-top: 3.5rem;
  padding-bottom: 2.5rem;
}

.site-footer__logo {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.site-footer__logo:hover {
  color: var(--color-accent);
}

.site-footer__tagline {
  margin-top: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--color-data);
  text-transform: uppercase;
}

.site-footer__about {
  margin-top: 1rem;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.site-footer__trust {
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 0.87rem;
  line-height: 1.7;
}

.site-footer__title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 1.1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--color-border);
}

.site-footer__nav,
.site-footer__doc-list,
.site-footer__contact-list {
  list-style: none;
}

.site-footer__nav li {
  border-bottom: 1px dashed var(--color-border);
}

.site-footer__nav a {
  display: block;
  padding: 0.45rem 0;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}

.site-footer__nav a:hover {
  color: var(--color-accent);
}

.site-footer__nav a::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--color-data);
  font-family: var(--font-data);
}

.site-footer__nav a[aria-current="page"] {
  color: var(--color-accent);
}

.site-footer__contact-list {
  display: grid;
  gap: 0.75rem;
}

.site-footer__contact-list li {
  display: flex;
  gap: 0.75rem;
  color: var(--color-text-secondary);
  font-size: 0.94rem;
}

.contact-label {
  flex: 0 0 3.2rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--color-data);
  padding-top: 0.25rem;
}

.site-footer__doc-list {
  display: grid;
  gap: 0.45rem;
}

.site-footer__doc-list a {
  display: inline-block;
  padding: 0.35rem 0;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.site-footer__doc-list a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.site-footer__doc-list a[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.site-footer__legal {
  border-top: 1px solid var(--color-border);
  padding: 1.1rem 0 1.4rem;
}

.site-footer__legal-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer__copyright,
.site-footer__owner {
  color: var(--color-text-secondary);
  font-size: 0.82rem;
}

.section {
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

.section--tight {
  padding-block: clamp(2.25rem, 5vw, 3.5rem);
}

.section-head {
  margin-bottom: 2.5rem;
  max-width: 720px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.section-subtitle {
  margin-top: 0.75rem;
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.card {
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
}

.card--accent {
  border-top: 3px solid var(--color-accent);
}

.card--data {
  background: var(--color-bg-card);
}

.card--bevel {
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.data-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.8rem;
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
  color: var(--color-data);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.data-pill::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  background: var(--color-data);
}

.data-pill--alert {
  color: var(--color-warn);
  border-color: var(--color-warn);
}

.data-pill--alert::before {
  background: var(--color-warn);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 0;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

.breadcrumb-sep {
  color: var(--color-border);
}

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

.img-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 9;
}

.img-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 26, 18, 0) 68%, rgba(6, 26, 18, 0.72) 100%);
  pointer-events: none;
}

.img-frame--cut {
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.data-chart {
  display: flex;
  align-items: end;
  gap: 0.5rem;
  height: 12rem;
  padding: 1.5rem;
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
}

.data-chart__bar {
  flex: 1;
  min-height: 0.25rem;
  height: calc(var(--bar-value, 0.5) * 100%);
  background: linear-gradient(180deg, var(--color-accent), var(--color-bg-light));
}

.data-chart__bar:nth-child(3n) {
  background: linear-gradient(180deg, var(--color-data), var(--color-bg-light));
}

.panel {
  background: var(--color-bg-mid);
  border: 1px solid var(--color-border);
}

.panel__toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: none;
  border: 0;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.panel__toggle::after {
  content: "+";
  font-family: var(--font-data);
  font-size: 1.1rem;
  color: var(--color-data);
}

.panel[data-open] .panel__toggle::after {
  content: "−";
}

.panel__content {
  padding: 0 1.25rem 1.25rem;
  color: var(--color-text-secondary);
}

.panel__content[hidden] {
  display: none !important;
}

@media (max-width: 1279.98px) {
  .site-header__tape {
    display: none;
  }

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

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    width: min(80vw, 340px);
    max-height: calc(100vh - var(--header-h-mobile));
    overflow-y: auto;
    background: var(--color-bg-card);
    border-left: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: 2rem 1.5rem;
    transform: translateX(105%);
    transition: transform 0.3s ease;
    overscroll-behavior: contain;
    box-shadow: -6px 12px 30px rgba(0, 0, 0, 0.35);
  }

  .site-nav[data-open] {
    transform: translateX(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.4rem;
  }

  .site-nav__link {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 0.9rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767.98px) {
  .site-header__cta {
    display: none;
  }

  .site-brand__glyph {
    width: 2.2rem;
    height: 2.2rem;
    font-size: 1.1rem;
  }

  .site-brand__name {
    font-size: 1.1rem;
  }

  .site-brand__tagline {
    display: none;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (min-width: 1280px) {
  .site-header__inner {
    min-height: 84px;
  }

  .site-nav {
    position: static;
    transform: none;
    width: auto;
  }

  .site-nav__list {
    flex-direction: row;
  }

  .nav-toggle {
    display: none;
  }
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}