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

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

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: #0A0E13;
  color: #EDF2F7;
  line-height: 1.8;
  min-height: 100vh;
}

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

a {
  color: #00E5FF;
  text-decoration: none;
  transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

a:hover {
  color: #C5FF3D;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  padding: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: #EDF2F7;
  text-wrap: balance;
}

:root {
  --color-bg: #0A0E13;
  --color-panel: #141C24;
  --color-accent: #C5FF3D;
  --color-accent-2: #00E5FF;
  --color-text: #EDF2F7;
  --color-muted: #8FA3B0;
  --color-line: #243241;
  --color-alert: #FF6B4A;
  --color-glass: rgba(255, 255, 255, 0.06);
  --gradient-data: linear-gradient(135deg, #C5FF3D 0%, #00E5FF 100%);
  --font-heading: "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;
  --container: 1200px;
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-12: 48px;
  --spacing-16: 64px;
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 16px;
  --font-xs: 12px;
  --font-sm: 14px;
  --font-md: 16px;
  --font-lg: 20px;
  --font-xl: 28px;
  --font-2xl: 40px;
}

:focus-visible {
  outline: 2px solid #C5FF3D;
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
  width: 100%;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  display: inline-block;
  padding: var(--spacing-3) var(--spacing-6);
  background: #C5FF3D;
  color: #0A0E13;
  font-weight: 700;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--font-sm);
  line-height: 1.4;
  border: 1px solid transparent;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
  text-decoration: none;
}

.btn--accent {
  background: #C5FF3D;
  color: #0A0E13;
}

.btn--accent:hover {
  background: #D6FF70;
  color: #0A0E13;
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: #243241;
  color: #EDF2F7;
  background: transparent;
}

.btn--ghost:hover {
  border-color: #00E5FF;
  color: #00E5FF;
  transform: translateY(-2px);
}

.btn--secondary {
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.3);
  color: #00E5FF;
}

.btn--secondary:hover {
  background: rgba(0, 229, 255, 0.15);
  color: #00E5FF;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4) 0;
  font-size: var(--font-sm);
  color: #8FA3B0;
}

.breadcrumb__link {
  color: #8FA3B0;
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: #C5FF3D;
}

.breadcrumb__sep {
  color: #243241;
}

.breadcrumb__current {
  color: #EDF2F7;
}

.section {
  padding: var(--spacing-16) 0;
}

.section--muted {
  background: #141C24;
}

.section__head {
  margin-bottom: var(--spacing-8);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
}

.section__desc {
  color: #8FA3B0;
  margin-top: var(--spacing-2);
  max-width: 720px;
}

.grid {
  display: grid;
  gap: var(--spacing-6);
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: #141C24;
  border: 1px solid #243241;
  border-radius: var(--radius);
  padding: var(--spacing-6);
}

.card:hover {
  border-color: #00E5FF;
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  font-family: var(--font-data);
  font-size: 12px;
  border: 1px solid #243241;
  border-radius: 999px;
  color: #00E5FF;
  background: rgba(255, 255, 255, 0.06);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.data-line {
  font-family: var(--font-data);
  font-size: var(--font-sm);
  color: #00E5FF;
  letter-spacing: 0.02em;
}

.site-header {
  position: relative;
  background-color: #0A0E13;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  border-bottom: 1px solid #243241;
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-data);
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 30;
  pointer-events: none;
  transition: transform 0.08s linear;
}

.site-header__topline {
  background: #141C24;
  border-bottom: 1px solid #243241;
}

.site-header__topline-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 32px;
  font-family: var(--font-data);
  font-size: var(--font-xs);
  color: #8FA3B0;
  letter-spacing: 0.04em;
}

.site-header__code {
  color: #C5FF3D;
  font-family: var(--font-data);
  font-size: var(--font-xs);
  letter-spacing: 0.1em;
  padding: 2px 8px;
  border: 1px solid #243241;
  border-radius: 2px;
  background: rgba(0, 0, 0, 0.3);
}

.site-header__edition {
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.site-header__main {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-6) 0;
  position: relative;
  min-height: 110px;
}

.site-header__main::after {
  content: "34.7466°N / 113.6254°E";
  position: absolute;
  right: var(--spacing-4);
  bottom: var(--spacing-2);
  font-family: var(--font-data);
  font-size: 10px;
  color: #243241;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-4);
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s ease;
}

.brand:hover {
  transform: translateY(-1px);
}

.brand__logo {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  padding: 4px;
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: 50%;
  background: #141C24;
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #EDF2F7;
  transition: color 0.25s ease;
}

.brand:hover .brand__name {
  color: #C5FF3D;
}

.brand__tag {
  font-family: var(--font-data);
  font-size: var(--font-xs);
  color: #00E5FF;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.brand--footer .brand__logo {
  width: 40px;
  height: 40px;
}

.brand--footer .brand__name {
  font-size: 1.25rem;
}

.brand--footer .brand__tag {
  color: #C5FF3D;
  font-size: 10px;
}

.nav-toggle {
  position: absolute;
  right: var(--spacing-4);
  top: 50%;
  transform: translateY(-50%);
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid #243241;
  border-radius: var(--radius-sm);
  background: #141C24;
  z-index: 15;
}

.nav-toggle__line {
  display: block;
  width: 22px;
  height: 2px;
  background: #C5FF3D;
  border-radius: 2px;
  transition: transform 0.25s ease, background-color 0.25s ease, opacity 0.25s ease;
}

.nav-toggle:hover {
  border-color: #C5FF3D;
}

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

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  position: relative;
  border-top: 1px solid #243241;
  border-bottom: 1px solid #243241;
  background: #141C24;
}

.site-nav::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 120px;
  height: 2px;
  background: var(--gradient-data);
  clip-path: polygon(0 0, 100% 0, calc(100% - 24px) 100%, 0 100%);
  opacity: 0.7;
  pointer-events: none;
}

.site-nav__list {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
}

.site-nav__item {
  position: relative;
}

.site-nav__item + .site-nav__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 18px;
  background: #243241;
}

.site-nav__link {
  display: block;
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-sm);
  font-weight: 500;
  color: #8FA3B0;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
}

.site-nav__link:hover {
  color: #C5FF3D;
  background: rgba(197, 255, 61, 0.05);
}

.site-nav__link[aria-current="page"] {
  color: #C5FF3D;
  background: rgba(197, 255, 61, 0.08);
  box-shadow: inset 0 -2px 0 #C5FF3D;
}

.site-footer {
  position: relative;
  background: #141C24;
  border-top: 1px solid #243241;
  padding-top: var(--spacing-16);
  margin-top: var(--spacing-16);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-data);
  opacity: 0.55;
  pointer-events: none;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-12);
  padding-bottom: var(--spacing-12);
}

.site-footer__trust {
  margin-top: var(--spacing-4);
  color: #8FA3B0;
  font-size: var(--font-sm);
  max-width: 380px;
}

.site-footer__title {
  font-size: var(--font-md);
  font-weight: 700;
  margin-bottom: var(--spacing-4);
  color: #EDF2F7;
  letter-spacing: 0.02em;
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.site-footer__list a {
  color: #8FA3B0;
  text-decoration: none;
  font-size: var(--font-sm);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.site-footer__list a::before {
  content: "/";
  margin-right: 6px;
  color: #C5FF3D;
  font-family: var(--font-data);
}

.site-footer__list a:hover {
  color: #C5FF3D;
  padding-left: 4px;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-4) 0;
  border-top: 1px solid #243241;
  font-family: var(--font-data);
  font-size: var(--font-xs);
  color: #8FA3B0;
}

.site-footer__copyright {
  margin: 0;
}

.site-footer__icp {
  margin: 0;
}

@media (max-width: 991.98px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767.98px) {
  .site-header__main {
    justify-content: flex-start;
    min-height: 80px;
    padding-left: var(--spacing-4);
  }

  .site-header__main::after {
    display: none;
  }

  .site-header__code {
    display: none;
  }

  .site-header__topline-inner {
    justify-content: center;
  }

  .brand {
    gap: var(--spacing-3);
  }

  .brand__logo {
    width: 42px;
    height: 42px;
    padding: 3px;
  }

  .brand__name {
    font-size: 1.4rem;
  }

  .brand__tag {
    font-size: 10px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
  }

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

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

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

  .site-nav__item + .site-nav__item::before {
    display: none;
  }

  .site-nav__item + .site-nav__item {
    border-top: 1px solid #243241;
  }

  .site-nav__link {
    padding: var(--spacing-4) var(--spacing-6);
    white-space: normal;
  }

  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .site-footer__brand {
    grid-column: auto;
  }
}

@media (max-width: 479.98px) {
  .brand__logo {
    width: 38px;
    height: 38px;
  }

  .brand__name {
    font-size: 1.2rem;
  }

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

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

  html {
    scroll-behavior: auto !important;
  }

  .scroll-progress {
    transition: none;
  }
}