:root {
  color-scheme: dark;
  font-family: "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #ededed;
  background: #0d0d0d;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  --accent: #c4fd18;
  --muted: #a0a0a0;
  --line: rgba(255, 255, 255, 0.09);
  --header-height: 80px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; border-radius: 2px; }
::selection { color: #0d0d0d; background: var(--accent); }

.page-width { width: min(100% - 96px, 1440px); margin-inline: auto; }
.skip-link { position: fixed; z-index: 20; top: 12px; left: 12px; padding: 12px 16px; color: #0d0d0d; background: var(--accent); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: relative; z-index: 5; border-bottom: 1px solid var(--line); background: #0d0d0d; }
.header-inner { height: var(--header-height); display: flex; align-items: center; gap: 44px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: none; }
.brand-symbol { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; color: #0d0d0d; background: var(--accent); font-size: 20px; font-weight: 700; letter-spacing: -.12em; }
.brand-symbol span { color: #0d0d0d; }
.brand-name { font-size: 16px; font-weight: 700; letter-spacing: .11em; }
.site-nav { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 38px); margin-left: auto; }
.site-nav a { padding: 8px 0; color: #bababa; font-size: 14px; transition: color .2s ease; }
.site-nav a:hover, .site-footer a:hover { color: var(--accent); }
.header-note { margin-left: 12px; padding-left: 32px; border-left: 1px solid var(--line); color: #777; font-size: 10px; font-weight: 600; letter-spacing: .16em; white-space: nowrap; }

.hero { position: relative; display: flex; align-items: center; min-height: min(740px, calc(100svh - var(--header-height))); overflow: hidden; border-bottom: 1px solid var(--line); }
.hero::before { position: absolute; inset: 0; content: ""; pointer-events: none; opacity: .32; background-image: linear-gradient(to right, transparent calc(25% - 1px), var(--line) 25%, transparent calc(25% + 1px)), linear-gradient(to right, transparent calc(75% - 1px), var(--line) 75%, transparent calc(75% + 1px)); }
.hero-copy { position: relative; z-index: 2; width: 100%; padding: 104px 0 128px; }
.eyebrow { display: flex; align-items: center; gap: 14px; margin: 0 0 35px; color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: .14em; }
.eyebrow-line { display: block; width: 28px; height: 1px; background: var(--accent); }
h1 { margin: 0 0 22px -9px; font-size: clamp(92px, 14vw, 212px); font-weight: 600; line-height: .85; letter-spacing: -.095em; }
.hero-period, .heading-dot { color: var(--accent); }
.hero-description { margin: 42px 0 0; color: #c6c6c6; font-size: clamp(20px, 2.2vw, 30px); font-weight: 400; letter-spacing: .07em; }
.hero-art { position: absolute; z-index: 1; right: 1%; top: 50%; width: min(46vw, 620px); aspect-ratio: 1; transform: translateY(-50%); opacity: .96; }
.art-orbit { position: absolute; border: 1px solid rgba(196, 253, 24, .27); border-radius: 50%; }
.art-orbit-outer { inset: 0; }
.art-orbit-inner { inset: 15%; border-color: rgba(196, 253, 24, .15); }
.art-orbit-outer::before, .art-orbit-outer::after { position: absolute; top: 50%; left: 50%; width: 120%; height: 1px; content: ""; background: rgba(196, 253, 24, .13); transform: translate(-50%, -50%); }
.art-orbit-outer::after { transform: translate(-50%, -50%) rotate(90deg); }
.art-core { position: absolute; inset: 30%; display: grid; place-items: center; border-radius: 50%; color: #0d0d0d; background: var(--accent); box-shadow: 0 0 110px rgba(196, 253, 24, .13); font-size: clamp(70px, 10vw, 145px); font-weight: 700; line-height: 1; letter-spacing: -.11em; padding-right: .1em; }
.art-cross { position: absolute; color: var(--accent); font-size: 24px; font-weight: 400; }
.art-cross-top { top: 2%; left: 21%; }
.art-cross-bottom { right: 4%; bottom: 19%; }
.hero-bottom { position: absolute; z-index: 2; right: 0; bottom: 28px; left: 0; display: flex; align-items: center; gap: 12px; color: #777; font-size: 11px; font-weight: 600; letter-spacing: .15em; }
.hero-bottom span:last-child { margin-left: auto; }
.scroll-arrow { color: var(--accent); font-size: 16px; }

.sections { border-bottom: 1px solid var(--line); }
.content-section { display: grid; grid-template-columns: minmax(230px, 34%) 1fr; min-height: 350px; padding: 72px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 24px; }
.content-section:last-child { border-bottom: 0; }
.section-heading { display: flex; flex-direction: column; align-items: flex-start; }
.section-number { color: var(--accent); font-size: 11px; font-weight: 600; letter-spacing: .18em; }
h2 { margin: 34px 0 0; font-size: clamp(48px, 5.2vw, 82px); font-weight: 500; letter-spacing: -.07em; line-height: 1.1; }
.section-space { position: relative; display: flex; align-items: flex-end; justify-content: flex-end; overflow: hidden; min-height: 208px; border: 1px solid var(--line); border-radius: 16px; background: #141414; }
.section-space::before { position: absolute; top: -1px; left: -1px; width: 46px; height: 46px; content: ""; border-top: 1px solid rgba(196, 253, 24, .55); border-left: 1px solid rgba(196, 253, 24, .55); border-radius: 16px 0 0; }
.section-space::after { position: absolute; top: 50%; left: 50%; width: 10px; height: 10px; content: ""; border: 1px solid rgba(196, 253, 24, .35); border-radius: 50%; transform: translate(-50%, -50%); }
.section-space span { padding: 22px 26px; color: rgba(255, 255, 255, .07); font-size: clamp(36px, 6vw, 86px); font-weight: 700; line-height: 1; letter-spacing: -.08em; user-select: none; }

.site-footer { background: #111; }
.footer-inner { display: flex; align-items: center; gap: 28px; min-height: 130px; }
.footer-inner span:first-child { font-size: 18px; font-weight: 700; letter-spacing: .1em; }
.footer-inner span:nth-child(2) { color: #777; font-size: 12px; }
.footer-inner a { margin-left: auto; color: #aaa; font-size: 12px; transition: color .2s ease; }

@media (max-width: 900px) {
  .page-width { width: min(100% - 48px, 1440px); }
  .header-note { display: none; }
  .hero { min-height: 640px; }
  .hero-art { right: -13%; width: 65vw; opacity: .48; }
  .content-section { grid-template-columns: 1fr; gap: 36px; min-height: 0; }
  h2 { margin-top: 18px; }
}

@media (max-width: 600px) {
  :root { --header-height: 112px; }
  .page-width { width: min(100% - 36px, 1440px); }
  .header-inner { align-content: center; flex-wrap: wrap; gap: 7px 20px; padding-block: 14px; }
  .brand { width: 100%; }
  .brand-symbol { width: 30px; height: 30px; border-radius: 8px; font-size: 17px; }
  .brand-name { font-size: 14px; }
  .site-nav { width: 100%; justify-content: space-between; gap: 12px; margin-left: 0; }
  .site-nav a { padding: 4px 0; font-size: 13px; }
  .hero { min-height: min(700px, calc(100svh - var(--header-height))); }
  .hero-copy { padding: 90px 0 132px; }
  .eyebrow { margin-bottom: 28px; font-size: 11px; }
  h1 { margin-left: -4px; font-size: clamp(66px, 17vw, 112px); }
  .hero-description { margin-top: 28px; font-size: 19px; }
  .hero-art { top: 58%; right: -32%; width: 95vw; opacity: .34; }
  .hero-bottom { bottom: 23px; font-size: 9px; }
  .content-section { padding: 54px 0; gap: 28px; }
  .section-space { min-height: 170px; }
  .section-space span { padding: 18px; font-size: clamp(34px, 11vw, 68px); }
  .footer-inner { flex-wrap: wrap; gap: 12px; padding-block: 28px; }
  .footer-inner span:first-child { width: 100%; }
  .footer-inner a { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}