:root {
  color: #171714;
  background: #f6f3ed;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
  --ink: #171714;
  --paper: #f6f3ed;
  --surface: #fffdf8;
  --surface-2: #f3efe7;
  --muted: #64645f;
  --line: rgba(23, 23, 20, .2);
  --line-soft: rgba(23, 23, 20, .12);
  --blue: #1d4ed8;
  --blue-soft: rgba(29, 78, 216, .1);
  --coral: #d9573b;
  --coral-soft: rgba(217, 87, 59, .08);
  --sage: #73866c;
  --radius-s: 10px;
  --radius-m: 18px;
  --radius-l: 24px;
  --shadow-soft: 0 1px 2px rgba(23, 23, 20, .04), 0 14px 34px rgba(23, 23, 20, .06);
  --shadow-lift: 0 2px 6px rgba(23, 23, 20, .05), 0 26px 56px rgba(23, 23, 20, .11);
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; }
a { color: inherit; text-underline-offset: 4px; }
h1, h2, h3, p, dl, dd { margin-top: 0; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link { position: fixed; z-index: 40; top: 12px; left: 12px; padding: 10px 14px; border-radius: var(--radius-s); color: #fff; background: var(--blue); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.shell {
  width: min(100%, 1540px);
  margin: 0 auto;
  padding: 0 42px 72px;
  position: relative;
  z-index: 1;
}
.shell::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: var(--grain);
  background-size: 180px 180px;
  opacity: .03;
  mix-blend-mode: multiply;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-bottom: 1px solid var(--line-soft);
  font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  font-size: 13px;
  background: rgba(246, 243, 237, .82);
  backdrop-filter: saturate(140%) blur(12px);
}
.brand { font-weight: 600; text-decoration: none; }
.brand span { color: var(--muted); font-weight: 400; }
.topbar nav { display: flex; align-items: center; gap: 26px; }
.topbar nav a { text-decoration: none; transition: color .18s ease; }
.topbar nav a:not(.workspace-link):hover { color: var(--blue); }
.workspace-link {
  padding-left: 18px;
  border-left: 1px solid var(--line);
  font-weight: 600;
  transition: color .18s ease;
}
.workspace-link:hover { color: var(--blue); }

.hero {
  position: relative;
  min-height: 610px;
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 6vw;
  align-items: center;
  padding: 96px 0 64px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: var(--grain);
  background-size: 180px 180px;
  opacity: .045;
  mix-blend-mode: multiply;
}
.hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  pointer-events: none;
  right: -6vw;
  top: -18vw;
  width: 52vw;
  height: 52vw;
  border-radius: 50%;
  background: rgba(29, 78, 216, .1);
  filter: blur(92px);
  box-shadow: -58vw 72vh 0 6vw rgba(217, 87, 59, .08);
}
.hero > * { position: relative; z-index: 1; }
.hero-copy, .hero-ledger { min-width: 0; }
.eyebrow, .section-index { color: var(--blue); font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif; font-size: 13px; font-weight: 500; letter-spacing: .02em; }
.hero h1 {
  max-width: 12ch;
  margin-bottom: 30px;
  font-family: "Noto Serif SC", SimSun, serif;
  font-size: clamp(52px, 5.9vw, 88px);
  font-weight: 400;
  line-height: 1.03;
  letter-spacing: -.045em;
  text-wrap: balance;
}
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lead {
  max-width: 44em;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(17px, 1.4vw, 21px);
  line-height: 1.78;
}
.actions, .feature-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 30px; }
.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-s);
  font-weight: 600;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { color: #fff; border-color: var(--blue); background: var(--blue); box-shadow: 0 9px 22px rgba(29, 78, 216, .14); }
.button-primary:hover { background: #173fb3; border-color: #173fb3; box-shadow: 0 14px 30px rgba(29, 78, 216, .22); }
.text-link { font-weight: 600; transition: color .18s ease; }
.text-link:hover { color: var(--blue); }
.hero-ledger {
  align-self: stretch;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-content: end;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}
.hero-ledger > div {
  min-height: 154px;
  display: grid;
  grid-template-columns: 32px 1fr;
  grid-template-rows: auto 1fr;
  gap: 7px 12px;
  align-content: start;
  padding: 20px 20px 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color .2s ease, transform .28s cubic-bezier(.22, 1, .36, 1), box-shadow .28s ease;
}
.hero-ledger > div:nth-child(odd) { border-right: 1px solid var(--line); }
.hero-ledger > div:nth-child(even) { padding-left: 20px; }
.hero-ledger > div:hover {
  background: var(--surface-2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}
.hero-ledger span { grid-row: 1 / 3; color: var(--blue); font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: .04em; }
.hero-ledger strong { font-family: "Noto Serif SC", SimSun, serif; font-size: 20px; font-weight: 500; }
.hero-ledger p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

.section-block { scroll-margin-top: 24px; }
.section-intro { display: grid; grid-template-columns: 3fr 9fr; gap: 4vw; align-items: start; padding: 92px 0 34px; }
.section-index { margin: 8px 0 0; display: flex; flex-direction: column; gap: 12px; }
.section-index::before { content: ""; width: 30px; height: 2px; background: var(--blue); border-radius: 2px; }
.section-intro > div { display: grid; grid-template-columns: 1.05fr .95fr; gap: 4vw; align-items: end; }
.section-intro h2 { margin-bottom: 0; font-family: "Noto Serif SC", SimSun, serif; font-size: clamp(38px, 4.1vw, 62px); font-weight: 400; line-height: 1.12; letter-spacing: -.03em; text-wrap: balance; }
.section-intro > div > p { margin-bottom: 0; color: var(--muted); line-height: 1.75; }

.showcase { display: grid; grid-template-columns: 7fr 5fr; gap: 18px; align-items: start; }
.feature {
  min-width: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-soft);
  transition: transform .26s ease, box-shadow .26s ease;
}
.feature:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); }
.feature-web { margin-top: 110px; border-top-color: var(--coral); }
.feature-media {
  position: relative;
  overflow: hidden;
  background: #f1eee7;
  border-bottom: 1px solid var(--line);
}
.feature-media a { display: block; }
.feature-media img { width: 100%; aspect-ratio: 16 / 9; display: block; object-fit: cover; transition: transform 320ms ease; }
.feature-media a:hover img { transform: scale(1.04); }
.feature-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: rgba(23, 23, 20, .05);
}
.media-label {
  position: absolute;
  right: 10px;
  bottom: 10px;
  z-index: 2;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  color: var(--ink);
  background: rgba(255, 253, 248, .94);
  backdrop-filter: blur(6px);
  font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  font-size: 11px;
}
.feature-body { padding: 28px 30px 30px; }
.feature-body h3 { margin-bottom: 16px; font-family: "Noto Serif SC", SimSun, serif; font-size: clamp(34px, 3vw, 48px); font-weight: 400; line-height: 1.14; letter-spacing: -.02em; }
.feature-web .feature-body h3 { font-size: clamp(30px, 2.5vw, 40px); }
.feature-summary { max-width: 46em; color: var(--muted); line-height: 1.75; }
.object-list { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 22px 0 0; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); list-style: none; font-size: 14px; }
.object-list li::before { content: "✓"; margin-right: 7px; color: var(--sage); font-weight: 700; }
.feature-actions { margin-top: 24px; }
.delivery-chain { display: grid; grid-template-columns: repeat(4, 1fr); margin: 30px 0 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.delivery-chain li { min-width: 0; padding: 15px 12px 0 0; font-size: 13px; line-height: 1.55; }
.delivery-chain li + li { padding-left: 12px; border-left: 1px solid var(--line); }
.delivery-chain span { display: block; margin-bottom: 7px; color: var(--blue); font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif; font-size: 11px; }
.delivery-chain b { font-weight: 500; }
.report-links { display: flex; flex-direction: column; gap: 4px; }

.proof-section { margin-top: 12px; }
.proof-contract {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 6vw;
  padding: 44px clamp(20px, 3vw, 48px);
  border: 1px solid var(--line);
  border-top: 5px solid var(--coral);
  border-radius: var(--radius-l);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}
.proof-statement { margin-bottom: 0; font-family: "Noto Serif SC", SimSun, serif; font-size: clamp(28px, 3vw, 43px); line-height: 1.35; text-wrap: balance; }
.proof-statement strong { color: var(--coral); font-weight: 500; }
.proof-contract dl { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 0; border-top: 1px solid var(--line); }
.proof-contract dl > div { min-height: 118px; display: grid; grid-template-columns: 58px 1fr; gap: 12px; padding: 18px 14px 18px 0; border-bottom: 1px solid var(--line); }
.proof-contract dl > div:nth-child(odd) { border-right: 1px solid var(--line); }
.proof-contract dl > div:nth-child(even) { padding-left: 14px; }
.proof-contract dt { color: var(--blue); font-weight: 600; }
.proof-contract dd { margin: 0; color: var(--muted); line-height: 1.65; }

.case-index { border-top: 1px solid var(--line); }
.case-index article {
  display: grid;
  grid-template-columns: 56px 2.2fr 3fr 1.2fr;
  gap: 22px;
  align-items: center;
  padding: 22px 14px;
  margin: 0 -14px;
  border-bottom: 1px solid var(--line);
  border-radius: var(--radius-m);
  transition: background-color .2s ease, transform .25s cubic-bezier(.22, 1, .36, 1), box-shadow .25s ease;
}
.case-index article:hover {
  background: rgba(255, 253, 248, .92);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
  border-color: rgba(29, 78, 216, .25);
}
.case-number { color: var(--blue); font-family: "IBM Plex Mono", monospace; font-size: 12px; }
.case-index article > div > p { margin-bottom: 5px; color: var(--muted); font-family: "IBM Plex Sans", "Noto Sans SC", sans-serif; font-size: 11px; }
.case-index h3 { margin-bottom: 0; font-family: "Noto Serif SC", SimSun, serif; font-size: 24px; font-weight: 400; }
.case-index article > p { margin-bottom: 0; color: var(--muted); line-height: 1.65; }
.case-index article > a { justify-self: end; font-weight: 600; transition: color .18s ease; }
.case-index article > a:hover { color: var(--blue); }
.index-links { display: flex; justify-content: flex-end; gap: 14px; }
.index-links a { transition: color .18s ease; }
.index-links a:hover { color: var(--blue); }

.footer {
  display: flex;
  overflow: clip;
  justify-content: space-between;
  gap: 30px;
  margin-top: 84px;
  padding: 30px 28px 0;
  border-top: 1px solid var(--line);
  border-radius: var(--radius-l) var(--radius-l) 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
  position: relative;
  background: var(--surface-2);
}
.footer > * { position: relative; z-index: 1; }
.footer::before {
  content: "";
  position: absolute;
  z-index: 0;
  pointer-events: none;
  right: -4vw;
  top: -12vw;
  width: 46vw;
  height: 46vw;
  border-radius: 50%;
  background: rgba(29, 78, 216, .07);
  filter: blur(82px);
}
.footer p { max-width: 58em; margin-bottom: 0; }
.footer div { display: flex; gap: 18px; white-space: nowrap; }
.footer a { transition: color .18s ease; }
.footer a:hover { color: var(--blue); }

a:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }

@media (min-width: 621px) {
  .hero h1 em { display: inline-block; white-space: nowrap; }
}

@media (max-width: 980px) {
  .shell { padding-inline: 22px; }
  .topbar { align-items: flex-start; flex-direction: column; padding: 18px 0; }
  .topbar nav { width: 100%; flex-wrap: wrap; gap: 12px 20px; }
  .workspace-link { margin-left: auto; }
  .hero { min-height: 0; grid-template-columns: minmax(0, 1fr); padding: 64px 0 48px; }
  .hero-ledger { margin-top: 18px; }
  .section-intro { grid-template-columns: 1fr; padding-top: 68px; }
  .section-intro > div { grid-template-columns: 1fr; }
  .showcase { grid-template-columns: 1fr; }
  .feature-web { margin-top: 0; }
  .proof-contract { grid-template-columns: 1fr; }
  .case-index article { grid-template-columns: 42px 2fr 3fr; }
  .case-index article > a, .index-links { grid-column: 2 / -1; justify-self: start; justify-content: flex-start; }
}

@media (max-width: 620px) {
  .shell { padding-inline: 16px; padding-bottom: 44px; }
  .topbar nav a:not(.workspace-link) { display: none; }
  .workspace-link { margin-left: 0; padding-left: 0; border-left: 0; }
  .hero h1 { max-width: none; font-size: clamp(42px, 11vw, 56px); }
  .hero .actions { display: grid; grid-template-columns: minmax(0, 1fr); }
  .hero .actions .button { width: 100%; max-width: 100%; white-space: normal; text-align: center; }
  .hero-ledger { grid-template-columns: 1fr; }
  .hero-ledger > div, .hero-ledger > div:nth-child(even) { min-height: 0; padding: 17px 0; border-right: 0; }
  .feature-body { padding: 24px 20px; }
  .delivery-chain { grid-template-columns: 1fr 1fr; }
  .delivery-chain li:nth-child(3) { padding-left: 0; border-left: 0; }
  .delivery-chain li:nth-child(n+3) { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
  .proof-contract dl { grid-template-columns: 1fr; }
  .proof-contract dl > div, .proof-contract dl > div:nth-child(even) { min-height: 0; padding: 16px 0; border-right: 0; }
  .case-index article { grid-template-columns: 34px 1fr; gap: 14px; }
  .case-index article > p, .case-index article > a, .index-links { grid-column: 2; }
  .footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .feature, .hero-ledger > div, .button, .case-index article { transition: none; }
  .feature-media img { transition: none; }
}