:root {
  --paper: #f4f0e6;
  --paper-2: #ebe6da;
  --white: #fffefa;
  --ink: #111314;
  --muted: #686b67;
  --blue: #1947d1;
  --blue-dark: #102d83;
  --lime: #d6ff3f;
  --copper: #99604c;
  --silver: #c9ccc7;
  --line: rgba(17, 19, 20, .19);
  --line-light: rgba(255, 255, 255, .2);
  --max: 1540px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "SF Pro Display", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.72;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a, button { font: inherit; }
::selection { color: var(--white); background: var(--blue); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--lime); outline-offset: 4px; }
.shell { width: min(calc(100% - 64px), var(--max)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: var(--ink);
  background: rgba(244, 240, 230, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.header-inner {
  min-height: 80px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 36px;
}
.brand-lockup { display: inline-flex; align-items: center; gap: 13px; min-width: 220px; }
.brand-lockup img { width: 43px; height: 43px; object-fit: contain; }
.brand-lockup strong { display: block; font-size: 18px; line-height: 1; letter-spacing: -.03em; }
.brand-lockup small { display: block; margin-top: 7px; color: #74776f; font-size: 9px; font-weight: 750; letter-spacing: .18em; text-transform: uppercase; }
.nav-menu { display: flex; justify-content: flex-end; gap: clamp(16px, 2.1vw, 36px); }
.nav-menu a {
  position: relative;
  padding: 28px 0 24px;
  color: #555852;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 3px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav-menu a:hover, .nav-menu a[aria-current="location"] { color: var(--blue); }
.nav-menu a:hover::after, .nav-menu a[aria-current="location"]::after { transform: scaleX(1); }
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
}
.menu-toggle span, .menu-toggle::before, .menu-toggle::after {
  content: "";
  display: block;
  width: 18px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
  transition: transform .2s ease, opacity .2s ease;
}
.menu-toggle[aria-expanded="true"] span { opacity: 0; }
.menu-toggle[aria-expanded="true"]::before { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"]::after { transform: translateY(-6px) rotate(-45deg); }

.hero { position: relative; border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: 124px minmax(0, .92fr) minmax(520px, 1.08fr);
  min-height: calc(100svh - 80px);
  border-inline: 1px solid var(--line);
}
.chapter-rail {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 36px 25px;
  color: var(--white);
  background: var(--blue);
  border-right: 1px solid var(--line);
}
.chapter-rail .issue { color: var(--lime); font-size: 11px; font-weight: 850; letter-spacing: .18em; text-transform: uppercase; }
.chapter-rail .edition { color: #d2d9f6; font-size: 9px; letter-spacing: .16em; text-transform: uppercase; writing-mode: vertical-rl; }
.hero-copy { display: flex; flex-direction: column; justify-content: center; padding: 86px clamp(44px, 5.5vw, 92px); background: var(--white); }
.hero-kicker { display: flex; align-items: center; gap: 14px; margin-bottom: 62px; color: var(--blue); font-size: 11px; font-weight: 850; letter-spacing: .18em; text-transform: uppercase; }
.hero-kicker::before { content: ""; width: 42px; height: 4px; background: var(--lime); border: 1px solid var(--ink); }
.hero-word { margin-left: -.075em; color: var(--blue); font-size: clamp(170px, 16vw, 286px); font-weight: 900; letter-spacing: -.105em; line-height: .62; }
h1 { max-width: 900px; margin: 36px 0 0; font-size: clamp(42px, 5vw, 76px); font-weight: 750; letter-spacing: -.06em; line-height: 1.04; text-wrap: balance; }
.hero-lead { max-width: 760px; margin: 31px 0 0; color: #4f524d; font-size: clamp(16px, 1.45vw, 20px); }
.hero-tagline { margin-top: 32px; padding-left: 17px; border-left: 5px solid var(--copper); font-size: 14px; font-weight: 680; }
.hero-visual { position: relative; min-height: calc(100% - 56px); margin: 28px 28px 28px 0; background: var(--blue); overflow: hidden; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; object-position: 58% center; }
.hero-visual::before {
  content: "";
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  width: 82px;
  height: 82px;
  background: var(--lime);
}
.hero-visual::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 42%;
  height: 18px;
  background: var(--copper);
}
.hero-strip { display: grid; grid-template-columns: repeat(4, 1fr); color: var(--white); background: var(--ink); border-top: 1px solid var(--line); }
.hero-strip div { min-height: 96px; padding: 22px 25px; border-right: 1px solid var(--line-light); }
.hero-strip div:last-child { border-right: 0; }
.hero-strip span { display: block; color: #8d9189; font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.hero-strip strong { display: block; margin-top: 7px; font-size: 13px; font-weight: 680; }

.breadcrumb { padding: 18px 0; color: #70736c; border-bottom: 1px solid var(--line); font-size: 12px; }
.section { padding: clamp(92px, 10vw, 156px) 0; border-bottom: 1px solid var(--line); }
.section-white { background: var(--white); }
.section-blue { color: var(--white); background: var(--blue); border-color: var(--line-light); }
.section-dark { color: var(--white); background: var(--ink); border-color: var(--line-light); }
.section-head { display: grid; grid-template-columns: 150px minmax(0, 1fr) minmax(280px, 430px); gap: 38px; align-items: start; margin-bottom: clamp(55px, 7vw, 96px); }
.section-code { padding-top: 8px; color: var(--blue); font-size: 10px; font-weight: 850; letter-spacing: .17em; text-transform: uppercase; }
.section-blue .section-code, .section-dark .section-code { color: var(--lime); }
h2 { margin: 0; font-size: clamp(38px, 4.8vw, 70px); font-weight: 730; letter-spacing: -.055em; line-height: 1.07; text-wrap: balance; }
.section-intro { margin: 5px 0 0; color: var(--muted); font-size: 15px; }
.section-blue .section-intro, .section-dark .section-intro { color: #c8cbc5; }
h3 { text-wrap: balance; }

.identity-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.identity-statement, .identity-register { background: var(--white); }
.identity-statement { padding: clamp(38px, 5vw, 76px); }
.identity-statement h3 { max-width: 760px; margin: 0 0 24px; font-size: clamp(28px, 3.2vw, 46px); letter-spacing: -.045em; line-height: 1.18; }
.identity-statement p { max-width: 800px; margin: 0 0 18px; color: #4e514c; }
.boundary-note { margin-top: 34px; padding: 23px 25px; color: var(--white); background: var(--ink); border-left: 7px solid var(--lime); font-size: 14px; }
.identity-register { display: flex; flex-direction: column; justify-content: center; }
.register-row { display: grid; grid-template-columns: 130px 1fr; gap: 24px; padding: 27px 31px; border-bottom: 1px solid var(--line); }
.register-row:last-child { border-bottom: 0; }
.register-row span { color: #777a74; font-size: 11px; }
.register-row strong { font-size: 14px; font-weight: 680; }
.pending { color: var(--copper); }

.paper-table { border-top: 1px solid var(--line); }
.paper-row { display: grid; grid-template-columns: 100px minmax(210px, .72fr) minmax(0, 1.28fr) 150px; gap: 28px; align-items: center; min-height: 138px; border-bottom: 1px solid var(--line); }
.paper-row .number { color: var(--blue); font-size: 11px; font-weight: 850; letter-spacing: .14em; }
.paper-row h3 { margin: 0; font-size: clamp(23px, 2.2vw, 32px); letter-spacing: -.04em; }
.paper-row p { margin: 0; color: var(--muted); font-size: 14px; }
.status { justify-self: end; padding: 7px 10px; border: 1px solid var(--line); font-size: 9px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }

.network-panel { display: grid; grid-template-columns: .75fr 1.25fr; border: 1px solid var(--line-light); }
.network-title { display: flex; flex-direction: column; justify-content: space-between; min-height: 510px; padding: clamp(38px, 5vw, 70px); background: var(--blue-dark); }
.network-title strong { font-size: clamp(70px, 8vw, 124px); letter-spacing: -.08em; line-height: .8; }
.network-title p { max-width: 420px; margin: 0; color: #cbd2ec; }
.network-list { display: grid; grid-template-columns: 1fr 1fr; }
.network-item { min-height: 255px; padding: 35px; border-left: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.network-item:nth-last-child(-n+2) { border-bottom: 0; }
.network-item span { display: block; margin-bottom: 70px; color: var(--lime); font-size: 10px; font-weight: 850; letter-spacing: .14em; }
.network-item h3 { margin: 0 0 11px; font-size: 22px; }
.network-item p { margin: 0; color: #c8cbc5; font-size: 13px; }

.route-line { border-top: 1px solid var(--line); }
.route-step { display: grid; grid-template-columns: 95px minmax(230px, .7fr) minmax(0, 1.3fr); gap: 34px; padding: 39px 0; border-bottom: 1px solid var(--line); }
.route-step .number { color: var(--copper); font-size: 11px; font-weight: 850; letter-spacing: .14em; }
.route-step h3 { margin: 0; font-size: clamp(25px, 2.7vw, 39px); letter-spacing: -.04em; }
.route-copy p { margin: 0 0 13px; color: var(--muted); font-size: 14px; }
.route-copy strong { font-size: 12px; font-weight: 780; }
.route-disclaimer { display: grid; grid-template-columns: 180px 1fr; gap: 30px; margin-top: 36px; padding: 28px 31px; color: var(--white); background: var(--blue); }
.route-disclaimer strong { font-size: 10px; letter-spacing: .16em; text-transform: uppercase; }
.route-disclaimer p { margin: 0; }

.security-lead { display: grid; grid-template-columns: 230px 1fr; gap: 50px; padding: clamp(38px, 5vw, 72px); color: var(--ink); background: var(--lime); }
.security-lead > span { font-size: 10px; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.security-lead h3 { max-width: 900px; margin: 0 0 16px; font-size: clamp(32px, 4vw, 56px); letter-spacing: -.055em; line-height: 1.08; }
.security-lead p { max-width: 830px; margin: 0; font-weight: 570; }
.risk-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 64px; border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.risk-card { min-height: 260px; padding: 32px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.risk-card span { display: block; margin-bottom: 58px; color: var(--copper); font-size: 10px; font-weight: 850; letter-spacing: .14em; }
.risk-card h3 { margin: 0 0 12px; font-size: 20px; }
.risk-card p { margin: 0; color: #b8bbb5; font-size: 13px; }

.version-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 1px; background: rgba(255,255,255,.25); border: 1px solid rgba(255,255,255,.25); }
.version-intro { display: flex; flex-direction: column; justify-content: space-between; min-height: 520px; padding: clamp(38px, 5vw, 70px); color: var(--ink); background: var(--lime); }
.version-intro .version-mark { font-size: clamp(86px, 10vw, 150px); font-weight: 900; letter-spacing: -.09em; line-height: .7; }
.version-intro h3 { margin: 0 0 16px; font-size: 34px; letter-spacing: -.045em; }
.version-intro p { margin: 0; }
.version-register { color: var(--ink); background: var(--white); }
.version-row { display: grid; grid-template-columns: 150px 1fr 125px; gap: 24px; align-items: center; min-height: 130px; padding: 25px 34px; border-bottom: 1px solid var(--line); }
.version-row:last-child { border-bottom: 0; }
.version-row strong { font-size: 15px; }
.version-row p { margin: 0; color: var(--muted); font-size: 13px; }
.version-row span { justify-self: end; color: var(--copper); font-size: 9px; font-weight: 850; letter-spacing: .11em; }
.verify-steps { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 48px; border-top: 1px solid rgba(255,255,255,.25); border-left: 1px solid rgba(255,255,255,.25); }
.verify-step { min-height: 200px; padding: 28px; border-right: 1px solid rgba(255,255,255,.25); border-bottom: 1px solid rgba(255,255,255,.25); }
.verify-step span { display: block; margin-bottom: 50px; color: var(--lime); font-size: 11px; font-weight: 850; }
.verify-step h3 { margin: 0 0 10px; font-size: 18px; }
.verify-step p { margin: 0; color: #d3d9ec; font-size: 12px; }

.release-grid { display: grid; grid-template-columns: 290px 1fr; gap: 62px; }
.release-date { position: sticky; top: 112px; align-self: start; padding: 29px; color: var(--white); background: var(--ink); }
.release-date span { color: var(--lime); font-size: 9px; font-weight: 850; letter-spacing: .15em; }
.release-date strong { display: block; margin: 35px 0 9px; font-size: 54px; letter-spacing: -.06em; line-height: 1; }
.release-date small { color: #a4a7a1; }
.release-list { border-left: 1px solid var(--line); }
.release-record { position: relative; display: grid; grid-template-columns: 145px 1fr; gap: 28px; padding: 0 0 52px 42px; }
.release-record::before { content: ""; position: absolute; top: 8px; left: -6px; width: 11px; height: 11px; background: var(--blue); border: 3px solid var(--paper); border-radius: 50%; }
.release-record time { color: var(--blue); font-size: 11px; font-weight: 780; }
.release-record h3 { margin: 0 0 10px; font-size: 22px; }
.release-record p { margin: 0; color: var(--muted); font-size: 14px; }

.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.faq-card { min-height: 235px; padding: clamp(29px, 3.2vw, 47px); background: var(--white); }
.faq-card span { display: block; margin-bottom: 28px; color: var(--blue); font-size: 10px; font-weight: 850; letter-spacing: .14em; }
.faq-card h3 { margin: 0 0 13px; font-size: 21px; }
.faq-card p { margin: 0; color: var(--muted); font-size: 14px; }

.archive-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.archive-card { min-height: 250px; padding: 33px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.archive-card span { display: block; margin-bottom: 62px; color: var(--lime); font-size: 10px; font-weight: 850; letter-spacing: .14em; }
.archive-card h3 { margin: 0 0 12px; font-size: 20px; }
.archive-card p { margin: 0; color: #b8bbb5; font-size: 13px; }
.source-block { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: 48px; background: var(--line-light); border: 1px solid var(--line-light); }
.source-block article { padding: 35px; background: #1b1e1f; }
.source-block h3 { margin: 0 0 11px; font-size: 19px; }
.source-block p { margin: 0; color: #b8bbb5; font-size: 13px; }

.site-footer { color: #b4b7b0; background: #090a0b; }
.footer-main { display: grid; grid-template-columns: .8fr 1.2fr; gap: 75px; padding: 68px 0; }
.footer-brand { display: flex; align-items: center; gap: 18px; }
.footer-brand img { width: 58px; height: 58px; object-fit: contain; }
.footer-brand strong { display: block; color: var(--white); font-size: 22px; }
.footer-brand small { display: block; margin-top: 5px; color: #73766f; font-size: 9px; letter-spacing: .16em; text-transform: uppercase; }
.footer-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 48px; }
.footer-facts div { padding-top: 14px; border-top: 1px solid var(--line-light); }
.footer-facts span { display: block; color: #73766f; font-size: 9px; letter-spacing: .13em; text-transform: uppercase; }
.footer-facts strong { display: block; margin-top: 7px; color: #c9ccc5; font-size: 12px; font-weight: 560; }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; padding: 23px 0 30px; color: #6f726c; border-top: 1px solid var(--line-light); font-size: 11px; }

@media (max-width: 1180px) {
  .header-inner { grid-template-columns: auto auto; }
  .menu-toggle { display: block; justify-self: end; }
  .nav-menu { position: absolute; top: 80px; right: 0; left: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; padding: 16px 32px 24px; background: rgba(244,240,230,.995); border-bottom: 1px solid var(--line); transform: translateY(-130%); opacity: 0; visibility: hidden; transition: transform .25s var(--ease), opacity .2s ease, visibility .2s ease; }
  .nav-menu.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-menu a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-menu a::after { right: auto; bottom: 7px; width: 28px; }
  .hero-grid { grid-template-columns: 110px 1fr; }
  .hero-copy { min-height: 710px; }
  .hero-visual { grid-column: 1 / -1; min-height: 430px; margin: 0; }
  .chapter-rail { grid-row: 1; }
  .section-head { grid-template-columns: 110px 1fr; }
  .section-intro { grid-column: 2; max-width: 720px; }
  .paper-row { grid-template-columns: 82px .7fr 1.3fr; }
  .status { grid-column: 2 / -1; justify-self: start; margin-bottom: 22px; }
  .verify-steps { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 820px) {
  .shell { width: min(calc(100% - 34px), var(--max)); }
  .hero-grid { grid-template-columns: 1fr; }
  .chapter-rail { display: none; }
  .hero-copy { min-height: 650px; padding: 70px 30px; }
  .hero-kicker { margin-bottom: 46px; }
  .hero-word { font-size: 150px; }
  .hero-visual { grid-column: auto; min-height: 380px; }
  .hero-strip { grid-template-columns: 1fr 1fr; }
  .hero-strip div:nth-child(2) { border-right: 0; }
  .hero-strip div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-head { grid-template-columns: 1fr; gap: 17px; }
  .section-intro { grid-column: auto; }
  .identity-grid, .network-panel, .version-layout, .release-grid, .source-block, .footer-main { grid-template-columns: 1fr; }
  .network-title { min-height: 350px; }
  .route-step { grid-template-columns: 70px 1fr; }
  .route-copy { grid-column: 2; }
  .security-lead { grid-template-columns: 1fr; gap: 18px; }
  .risk-grid { grid-template-columns: 1fr 1fr; }
  .release-date { position: static; }
  .archive-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  html { scroll-padding-top: 69px; }
  .header-inner { min-height: 68px; }
  .brand-lockup { min-width: 0; }
  .brand-lockup img { width: 38px; height: 38px; }
  .brand-lockup small { display: none; }
  .nav-menu { top: 68px; grid-template-columns: 1fr; max-height: calc(100vh - 68px); padding-inline: 18px; overflow-y: auto; }
  .hero-copy { min-height: 600px; padding: 62px 20px; }
  .hero-word { font-size: 122px; }
  h1 { margin-top: 28px; font-size: 40px; }
  .hero-lead { font-size: 15px; }
  .hero-visual { min-height: 280px; }
  .hero-strip { grid-template-columns: 1fr; }
  .hero-strip div { border-right: 0; border-bottom: 1px solid var(--line); }
  .section { padding: 78px 0; }
  h2 { font-size: 39px; }
  .register-row { grid-template-columns: 1fr; gap: 5px; }
  .paper-row { grid-template-columns: 58px 1fr; padding: 27px 0; }
  .paper-row p, .status { grid-column: 2; }
  .network-list, .risk-grid, .faq-grid, .archive-grid { grid-template-columns: 1fr; }
  .network-item { border-left: 0; border-bottom: 1px solid var(--line-light) !important; }
  .network-item:last-child { border-bottom: 0 !important; }
  .route-step { grid-template-columns: 55px 1fr; }
  .route-disclaimer { grid-template-columns: 1fr; }
  .verify-steps { grid-template-columns: 1fr; }
  .version-row { grid-template-columns: 1fr; gap: 7px; }
  .version-row span { justify-self: start; }
  .release-record { grid-template-columns: 1fr; gap: 7px; padding-left: 28px; }
  .faq-card { min-height: 0; }
  .source-block { grid-template-columns: 1fr; }
  .footer-facts { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}