:root {
  color-scheme: dark;
  --ink: #050707;
  --panel: #0a0e0f;
  --paper: #f4f2ec;
  --muted: #929c9e;
  --line: rgba(217, 231, 232, 0.12);
  --cyan: #21d6e7;
  --gold: #e4a93f;
  --header-height: 82px;
  --site-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --reveal-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* { box-sizing: border-box; }

html { background: var(--ink); scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 86% 0%, rgba(228, 169, 63, 0.075), transparent 29rem),
    radial-gradient(circle at 0% 72%, rgba(33, 214, 231, 0.055), transparent 34rem),
    var(--ink);
  color: var(--paper);
  font-family: var(--site-font);
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: 20;
  inset: 0;
  pointer-events: none;
  content: "";
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.3'/%3E%3C/svg%3E");
  opacity: 0.025;
}

a { color: inherit; }

.info-header {
  position: sticky;
  z-index: 30;
  top: 0;
  height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(24px, 4vw, 64px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(3, 5, 5, 0.92);
  backdrop-filter: blur(18px);
}

.info-wordmark {
  display: inline-flex;
  width: max-content;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 630;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.info-wordmark svg { width: 30px; height: 30px; }

.info-header > nav { display: flex; gap: clamp(24px, 4vw, 58px); }

.info-header > nav a,
.info-header-cta {
  color: rgba(244, 242, 236, 0.68);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.info-header > nav a:hover,
.info-header > nav a:focus-visible { color: #baf8ff; }

.info-header-cta {
  justify-self: end;
  padding: 10px 18px;
  border: 1px solid rgba(244, 242, 236, 0.42);
  color: var(--paper);
}

.info-header-cta:hover,
.info-header-cta:focus-visible { border-color: var(--cyan); background: rgba(33, 214, 231, 0.07); }

.info-shell {
  width: min(1380px, calc(100% - 64px));
  margin: 0 auto;
  padding: clamp(76px, 9vw, 128px) 0 120px;
}

.info-hero {
  position: relative;
  max-width: 1120px;
  padding-bottom: clamp(58px, 7vw, 92px);
  border-bottom: 1px solid var(--line);
}

.info-hero::after {
  position: absolute;
  right: 2%;
  bottom: 0;
  width: min(38vw, 520px);
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.6;
}

.info-eyebrow {
  margin: 0 0 28px;
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.28em;
}

.info-hero h1 {
  max-width: 860px;
  margin: 0;
  font-family: var(--site-font);
  font-size: clamp(48px, 6.4vw, 92px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: 0.015em;
  text-wrap: balance;
}

.info-hero > p:last-child {
  max-width: 680px;
  margin: 30px 0 0;
  color: rgba(224, 230, 229, 0.64);
  font-size: 14px;
  line-height: 1.9;
  text-wrap: pretty;
}

.info-hero.compact { max-width: 980px; }
.info-hero.legal h1 { font-size: clamp(48px, 5.6vw, 78px); }

.info-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 850px);
  gap: clamp(58px, 8vw, 126px);
  align-items: start;
  padding-top: clamp(58px, 7vw, 92px);
}

.info-toc {
  position: sticky;
  top: calc(var(--header-height) + 32px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.info-toc p { margin: 0 0 16px; color: rgba(224, 230, 229, 0.34); font-size: 10px; letter-spacing: 0.18em; }

.info-toc a {
  position: relative;
  padding: 9px 0 9px 18px;
  color: rgba(224, 230, 229, 0.48);
  font-size: 12px;
  text-decoration: none;
  transition: color 180ms ease;
}

.info-toc a::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 6px;
  height: 1px;
  content: "";
  background: rgba(224, 230, 229, 0.25);
  transition: width 180ms ease, background 180ms ease;
}

.info-toc a:hover,
.info-toc a:focus-visible { color: #baf8ff; }
.info-toc a:hover::before,
.info-toc a:focus-visible::before { width: 10px; background: var(--cyan); }

.info-article { min-width: 0; }

.info-article > section {
  padding: 0 0 54px;
  margin: 0 0 54px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-height) + 32px);
}

.info-article > section:last-child { margin-bottom: 0; }

.info-article h2 {
  margin: 0 0 24px;
  color: #f4f2ec;
  font-size: clamp(22px, 2vw, 29px);
  font-weight: 590;
  letter-spacing: -0.025em;
}

.info-article h3 { margin: 34px 0 12px; color: rgba(244, 242, 236, 0.88); font-size: 15px; font-weight: 590; }
.info-article p,
.info-article li { color: rgba(218, 225, 224, 0.64); font-size: 14px; line-height: 1.95; }
.info-article p { max-width: 75ch; margin: 0 0 18px; }
.info-article ul,
.info-article ol { max-width: 75ch; margin: 16px 0 0; padding-left: 1.35em; }
.info-article li + li { margin-top: 9px; }
.info-article a:not(.contact-email):not(.inline-action) { color: #9ceff7; }

.section-index { display: block; margin-bottom: 12px; color: var(--cyan); font-size: 10px; letter-spacing: 0.16em; }

.info-note,
.info-warning {
  margin: 28px 0;
  padding: 20px 22px;
  font-size: 13px;
  line-height: 1.8;
}

.info-note { border-left: 2px solid var(--gold); background: rgba(228, 169, 63, 0.045); color: rgba(236, 218, 182, 0.7); }
.info-warning { border-left: 2px solid #e69b6b; background: rgba(230, 155, 107, 0.055); color: rgba(244, 207, 184, 0.74); }
.legal-notice { max-width: 1080px; margin: 38px 0 0; }

.info-action,
.inline-action {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  margin-top: 8px;
  padding: 13px 18px;
  border: 1px solid rgba(33, 214, 231, 0.44);
  color: #baf8ff;
  font-size: 13px;
  text-decoration: none;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.info-action:hover,
.info-action:focus-visible,
.inline-action:hover,
.inline-action:focus-visible { border-color: var(--cyan); background: rgba(33, 214, 231, 0.07); transform: translateY(-1px); }

.info-card-grid,
.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 28px; }
.info-card-grid > div,
.contact-grid > div { min-height: 160px; padding: 24px; border: 1px solid var(--line); background: rgba(10, 14, 15, 0.72); }
.contact-grid > div > span { display: block; margin-bottom: 28px; color: rgba(224, 230, 229, 0.36); font-size: 10px; letter-spacing: 0.14em; }
.info-card-grid h3,
.contact-grid h3 { display: block; margin: 0 0 10px; font-size: 16px; font-weight: 580; }
.info-card-grid p,
.contact-grid p { margin: 0; font-size: 12px; line-height: 1.7; }

.step-list { list-style: none; counter-reset: steps; padding: 0 !important; }
.step-list li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(140px, 0.45fr) minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0 20px 44px;
  border-top: 1px solid var(--line);
  counter-increment: steps;
}

.step-list li::before { position: absolute; top: 22px; left: 0; content: counter(steps, decimal-leading-zero); color: var(--cyan); font-size: 10px; }
.step-list strong { color: rgba(244, 242, 236, 0.9); font-weight: 580; }
.step-list span { color: rgba(218, 225, 224, 0.56); }

.info-article details { border-top: 1px solid var(--line); padding: 20px 0; }
.info-article details:last-child { border-bottom: 1px solid var(--line); }
.info-article summary { cursor: pointer; color: rgba(244, 242, 236, 0.86); font-size: 14px; }
.info-article details p { margin: 16px 0 0; }

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  margin: 4px 0 34px;
  color: #baf8ff;
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 520;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.legal-copy p,
.legal-copy li { color: rgba(218, 225, 224, 0.68); }

.info-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: min(1380px, calc(100% - 64px));
  margin: 0 auto;
  padding: 30px 0 40px;
  border-top: 1px solid var(--line);
  color: rgba(224, 230, 229, 0.34);
  font-size: 11px;
}

.info-footer b { font-weight: inherit; }
.info-footer nav { display: flex; flex-wrap: wrap; gap: 22px; }
.info-footer a { text-decoration: none; }
.info-footer a:hover,
.info-footer a:focus-visible { color: #baf8ff; }

.site-text-reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 900ms ease var(--reveal-delay, 0ms), transform 1100ms var(--reveal-ease) var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.site-text-reveal.is-text-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { --reveal-delay: 90ms; }
.reveal-delay-2 { --reveal-delay: 180ms; }
.reveal-delay-3 { --reveal-delay: 270ms; }

@media (max-width: 800px) {
  :root { --header-height: 64px; }
  .info-header { grid-template-columns: 1fr auto; padding: 0 18px; }
  .info-header > nav { display: none; }
  .info-wordmark { font-size: 16px; }
  .info-wordmark svg { width: 26px; height: 26px; }
  .info-header-cta { padding: 8px 11px; font-size: 11px; }
  .info-shell { width: calc(100% - 40px); padding: 60px 0 84px; }
  .info-hero h1 { font-size: clamp(42px, 13vw, 62px); }
  .info-layout { grid-template-columns: 1fr; gap: 46px; }
  .info-toc { position: static; display: grid; grid-template-columns: 1fr 1fr; }
  .info-toc p { grid-column: 1 / -1; }
  .info-card-grid,
  .contact-grid { grid-template-columns: 1fr; }
  .step-list li { grid-template-columns: 1fr; gap: 8px; }
  .info-footer { width: calc(100% - 40px); flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
  .site-text-reveal { opacity: 1 !important; transform: none !important; }
}