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

:root {
  --c-primary: #C8FF00;
  --c-secondary: #00C2FF;
  --c-gold: #FFC700;
  --c-bg: #0F1115;
  --c-bg-alt: #0C0D10;
  --c-elevated: #1A1D23;
  --c-text: #F0F4F8;
  --c-text-secondary: #A0AAB5;
  --c-border: #2A2E35;
  --c-data: #7BFA8C;
  --font-headline: "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", "Consolas", monospace;
  --container-width: 1280px;
  --space-sec: 96px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
}

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

@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;
  }
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 82% 0%, rgba(0, 194, 255, 0.05), transparent 52%),
    linear-gradient(180deg, #101217 0%, var(--c-bg-alt) 78%, #101217 100%);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.22;
  margin: 0 0 0.5em;
  scroll-margin-top: 120px;
}

h1 {
  font-size: clamp(40px, 6vw, 64px);
}

h2 {
  font-size: clamp(28px, 4vw, 40px);
}

h3 {
  font-size: clamp(20px, 3vw, 28px);
}

p {
  margin-bottom: 1em;
}

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

a:hover {
  text-decoration: underline;
}

ul, ol {
  margin: 0 0 1em 1.25em;
  padding: 0;
}

[data-year] {
  font-variant-numeric: tabular-nums;
}

.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 200;
  background: var(--c-primary);
  color: #0A0C0E;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 14px;
  padding: 12px 20px;
  border-radius: 14px;
  transform: translateY(-220%);
  transition: transform 0.2s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.skip-link:focus {
  transform: translateY(0);
  text-decoration: none;
}

.site-header {
  position: relative;
  z-index: 100;
  padding: 18px 24px 0;
}

.header-inner {
  max-width: var(--container-width);
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(26, 29, 35, 0.9);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 10px 10px 10px 18px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-lockup:hover {
  text-decoration: none;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--c-primary);
  color: #0A0C0E;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 21px;
  line-height: 1;
  border-radius: 12px;
  transform: rotate(-8deg);
  box-shadow: 4px 4px 0 rgba(0, 194, 255, 0.3);
}

.brand-name {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.05em;
  color: var(--c-text);
}

.site-nav {
  margin-inline: auto;
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--c-text-secondary);
  background: transparent;
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
  color: var(--c-text);
  background: rgba(0, 194, 255, 0.1);
  text-decoration: none;
}

.nav-link[aria-current="page"] {
  color: var(--c-primary);
  background: rgba(200, 255, 0, 0.1);
}

.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  font-family: var(--font-headline);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--c-text);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--c-primary);
  color: #11150A;
}

.btn-primary:hover {
  background: #b3e600;
  box-shadow: 0 8px 24px rgba(200, 255, 0, 0.25);
}

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

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

.header-action {
  flex-shrink: 0;
  border-radius: 14px;
  padding: 10px 20px;
  transform: skewX(-8deg);
  box-shadow: 0 5px 0 rgba(0, 0, 0, 0.2);
}

.header-action:hover {
  transform: skewX(-8deg) translateY(-1px);
}

.btn-label {
  display: inline-block;
  transform: skewX(8deg);
  letter-spacing: 0.06em;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--c-border);
  border-radius: 14px;
  cursor: pointer;
  padding: 10px;
  transition: border-color 0.2s ease;
}

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

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  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: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 999;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  pointer-events: none;
}

.site-footer {
  position: relative;
  margin-top: 80px;
  background: var(--c-elevated);
  border-top: 1px solid var(--c-border);
  padding: 0 24px 28px;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary) 46%, transparent 100%);
}

.site-footer::after {
  content: "";
  position: absolute;
  bottom: -90px;
  right: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 194, 255, 0.13) 0%, transparent 70%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-width);
  margin: 0 auto;
}

.footer-external {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 44px 0 32px;
  border-bottom: 1px solid var(--c-border);
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand {
  display: inline-block;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 34px;
  line-height: 1.2;
  letter-spacing: 0.06em;
  color: var(--c-text);
  transform: skewX(-3deg);
  transition: color 0.2s ease;
}

.footer-brand:hover {
  color: var(--c-primary);
  text-decoration: none;
}

.footer-slogan {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--c-text-secondary);
}

.footer-download {
  flex-shrink: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding: 40px 0;
}

.footer-heading {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--c-text);
  margin: 0 0 16px;
}

.footer-desc {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-text-secondary);
}

.footer-trust {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-text-secondary);
  border-left: 2px solid var(--c-gold);
  padding-left: 12px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--c-text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--c-secondary);
}

.contact-line {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-text-secondary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--c-border);
  font-size: 13px;
  color: var(--c-text-secondary);
}

.copyright,
.icp {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  position: relative;
  padding: var(--space-sec) 0;
}

.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  font-size: 14px;
  color: var(--c-text-secondary);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-border);
}

.breadcrumb a {
  color: var(--c-secondary);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

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

.panel {
  background: var(--c-elevated);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
}

.panel--strong {
  border: 2px solid var(--c-border);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.25);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-border);
  background: var(--c-elevated);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--c-text-secondary);
}

.chip--green {
  color: var(--c-primary);
  border-color: rgba(200, 255, 0, 0.35);
}

.chip--blue {
  color: var(--c-secondary);
  border-color: rgba(0, 194, 255, 0.35);
}

.chip--gold {
  color: var(--c-gold);
  border-color: rgba(255, 199, 0, 0.35);
}

.data-number {
  font-family: var(--font-data);
  font-weight: 500;
  font-size: 14px;
  line-height: 1.4;
  color: var(--c-data);
  font-variant-numeric: tabular-nums;
}

.title-tilt {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.15;
  transform: skewX(-2deg);
  transform-origin: left center;
}

.figure {
  margin: 0;
}

.image-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(200, 255, 0, 0.07), transparent 42%),
    var(--c-elevated);
  border: 1px solid var(--c-border);
}

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

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

.image-frame--square {
  aspect-ratio: 1 / 1;
}

.image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--c-text-secondary);
}

@media (max-width: 1023px) {
  :root {
    --space-sec: 64px;
  }

  .site-header {
    padding: 12px 14px 0;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 18px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .site-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    gap: 4px;
    margin-inline: 0;
    margin-top: 4px;
    border-top: 1px solid var(--c-border);
    padding-top: 10px;
  }

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

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

  .nav-link {
    width: 100%;
    padding: 11px 12px;
  }

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

  .header-action {
    margin-left: auto;
    padding: 8px 16px;
    font-size: 14px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

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

@media (max-width: 640px) {
  .site-header {
    padding: 10px 10px 0;
  }

  .header-inner {
    border-radius: 16px;
  }

  .brand-name {
    font-size: 16px;
  }

  .header-action .btn-label {
    font-size: 13px;
  }

  .site-footer {
    padding: 0 16px 24px;
  }

  .footer-external {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 32px 0 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 28px 0;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .container {
    padding: 0 18px;
  }

  .section {
    padding: 48px 0;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .breadcrumb {
    padding: 16px 18px 0;
  }
}