:root {
  color-scheme: light;
  --page: #f6f6f8;
  --ink: #17181e;
  --muted: #555e6b;
  --line: #dfe1e8;
  --accent: #374b6c;
  --width: 1200px;
  --gutter: clamp(20px, 3.4vw, 52px);
  font-family: Inter, system-ui, -apple-system, "Microsoft YaHei", sans-serif;
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--ink); font-size: 17px; }
h1, h2, h3, h4, p, figure { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }
:focus-visible { outline: 3px solid #5075b7; outline-offset: 4px; }

.wrap { width: min(var(--width), calc(100% - var(--gutter) * 2)); margin-inline: auto; }
.skip { position: fixed; left: 16px; top: 16px; padding: 12px 16px; border-radius: 8px; background: #fff; transform: translateY(-180%); z-index: 5; }
.skip:focus { transform: none; }

.header {
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid #e7e8ee;
  background: #f6f6f8f2;
  backdrop-filter: blur(18px);
}
.topbar { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; min-height: 79px; gap: 20px; }
.brand, .header-actions, .topbar nav { display: flex; align-items: center; }
.brand { gap: 10px; justify-self: start; }
.brand img { border-radius: 8px; }
.brand strong { font-size: 22px; letter-spacing: -.035em; }
.brand-tag { color: var(--muted); border-inline-start: 1px solid var(--line); padding-inline-start: 12px; font-size: 13px; }
.topbar nav { gap: clamp(16px, 2.1vw, 28px); }
.topbar nav a { color: var(--muted); font-size: 16px; white-space: nowrap; }
.topbar nav a:hover { color: var(--ink); }
.header-actions { gap: 8px; justify-self: end; }
.header-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: 48px;
  min-height: 42px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  white-space: nowrap;
}
.header-button[hidden] { display: none; }
.header-button:hover { border-color: #8b97af; }

.hero {
  overflow: hidden;
  background: radial-gradient(ellipse at 80% 37%, #dbe2f0 0, transparent 52%), var(--page);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 1fr);
  align-items: center;
  gap: 44px clamp(32px, 5vw, 78px);
  padding-block: clamp(58px, 7vw, 100px);
}
.eyebrow { font-size: 13px; line-height: 1.5; letter-spacing: .07em; font-weight: 650; color: var(--muted); }
.status { display: inline-flex; align-items: center; gap: 8px; }
.status::before { content: ""; width: 6px; height: 6px; flex: 0 0 6px; border-radius: 50%; background: #546d91; box-shadow: 0 0 0 4px #546d9118; }
.hero h1 { font-size: clamp(58px, 7vw, 100px); line-height: 1.05; letter-spacing: -.065em; margin-block: 26px 21px; }
.hero h1 > span { display: block; margin-top: 16px; color: var(--muted); font-size: clamp(25px, 3.1vw, 43px); line-height: 1.16; letter-spacing: -.042em; }
.hero-slogan { font-size: clamp(22px, 2.35vw, 30px); font-weight: 650; line-height: 1.4; }
.hero-detail { max-width: 520px; margin-top: 16px; color: var(--muted); font-size: 18px; line-height: 1.8; }
.hero-feature { display: grid; gap: 5px; margin-top: 22px; padding: 14px 17px; border: 1px solid #ccd6e7; border-inline-start: 4px solid #536b94; border-radius: 12px; background: #eef2f9; color: #2f4160; }
.hero-feature:hover { border-color: #536b94; }
.hero-feature strong { line-height: 1.45; }
.hero-feature span { font-size: 15px; line-height: 1.65; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 27px; margin-top: 25px; }
.button, .text-link { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; font-size: 16px; font-weight: 650; }
.button { gap: 26px; min-height: 52px; padding: 10px 23px; border-radius: 100px; background: var(--ink); color: #fff; }
.button:hover { background: #323948; }
.text-link:hover, .source-link:hover { text-decoration: underline; text-underline-offset: 4px; }

.hero-visual { position: relative; isolation: isolate; margin: 10px 10px 0; }
.hero-visual::before, .hero-visual::after {
  content: "";
  position: absolute;
  inset: -9px;
  z-index: -1;
  border: 1px solid #d3dae7;
  border-radius: 33px;
  transform: rotate(5deg);
}
.hero-visual::after { inset: 9px -17px -14px 8px; transform: rotate(1deg); }
.logo-surface {
  overflow: hidden;
  border: 1px solid #e1e5ef;
  border-radius: 30px;
  background: #fff;
  box-shadow: 0 28px 60px #2d3c6020;
  transform: rotate(-3.5deg);
}
.logo-image { display: grid; place-items: center; aspect-ratio: 1.15; background: #000; }
.logo-image img { width: 81%; height: auto; object-fit: contain; }
.logo-surface figcaption { display: flex; justify-content: space-between; gap: 12px; padding: 14px 22px; color: var(--muted); font-size: 13px; }
.launch-strip { grid-column: 1 / -1; display: flex; align-items: center; gap: 18px; min-height: 64px; padding: 16px 23px; border: 1px solid var(--line); border-radius: 18px; background: #ffffffd0; color: var(--muted); font-size: 16px; }
.launch-strip:hover { border-color: #8b97af; }
.launch-strip strong { color: var(--ink); }
.launch-strip span:last-child { margin-inline-start: auto; }
.section { padding-block: clamp(58px, 7.5vw, 98px); }
.section h2 { font-size: clamp(34px, 4.25vw, 56px); line-height: 1.15; letter-spacing: -.045em; overflow-wrap: anywhere; }
.section .eyebrow + h2 { margin-top: 14px; }
.section-detail { margin-block: 18px 8px; color: var(--muted); font-size: 18px; line-height: 1.85; }
.mechanism { background: radial-gradient(ellipse at 84% 0, #252b38, transparent 65%), #17181f; color: #fff; }
.mechanism-lead { display: grid; grid-template-columns: 1.2fr 1fr; gap: 22px; align-items: end; }
.mechanism-lead .eyebrow, .mechanism-lead h2 span:last-child { color: #bec8dc; }
.mechanism-lead > p { justify-self: end; max-width: 460px; color: #c9d0e0; font-size: 18px; line-height: 1.8; }
.mechanism-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 36px; }
.mechanism-card { padding: clamp(20px, 2.6vw, 32px); border: 1px solid #3b4050; border-radius: 20px; background: #242631; }
.mechanism-card h3 { font-size: clamp(18px, 2vw, 24px); line-height: 1.34; letter-spacing: -.025em; }
.metric { display: block; margin-block: 16px 12px; color: #d5def2; font-size: clamp(29px, 3.5vw, 46px); font-weight: 650; line-height: 1.1; letter-spacing: -.05em; }
.metric-pending { font-size: clamp(25px, 2.8vw, 38px); }
.mechanism-card p, .mechanism-note p { color: #c9d0e0; font-size: 16px; line-height: 1.75; }
.mechanism-note { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 20px; margin-top: 24px; padding-top: 20px; border-top: 1px solid #3b4050; }
.mechanism-note .source-link { color: #d5def2; }
.source-link { display: inline-block; font-size: 16px; line-height: 1.55; color: var(--accent); font-weight: 650; }

.project { display: grid; grid-template-columns: .8fr 1.2fr; align-items: start; gap: clamp(34px, 7vw, 100px); }
.project-sheet { min-width: 0; padding: 10px clamp(18px, 3vw, 35px); border-radius: 24px; border: 1px solid var(--line); background: #fff; }
.project-sheet dl > div { display: flex; justify-content: space-between; gap: 14px; padding-block: 16px; align-items: baseline; font-size: 16px; line-height: 1.6; }
.project-sheet dl > div + div { border-top: 1px solid #eceef2; }
.project-sheet dl, .project-sheet dd { margin: 0; }
.project-sheet dt { max-width: 56%; color: var(--muted); overflow-wrap: anywhere; }
.project-sheet dd { min-width: 0; text-align: end; overflow-wrap: anywhere; }

.narrative, .whitepaper, .community { border-top: 1px solid var(--line); }
.story-grid, .community-grid { display: grid; gap: 16px; margin-top: 30px; }
.story-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.story-card { display: flex; flex-direction: column; align-items: start; gap: 14px; min-width: 0; padding: clamp(22px, 3vw, 36px); border: 1px solid var(--line); border-radius: 23px; background: #fff; }
.story-card:first-child { background: linear-gradient(130deg, #fff 52%, #edf1f8); }
.story-card h3 { font-size: clamp(22px, 2.3vw, 30px); line-height: 1.3; letter-spacing: -.03em; }
.story-card p:not(.eyebrow), .community-card p { color: var(--muted); font-size: 17px; line-height: 1.75; }
.story-card .source-link { margin-top: auto; }
.community-grid { grid-template-columns: 1.25fr 1fr 1fr; }
.community-card { display: flex; align-items: center; gap: 15px; min-width: 0; padding: 20px 23px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
a.community-card:hover { border-color: #8b97af; }
.community-card h3 { margin-bottom: 3px; font-size: 21px; line-height: 1.4; }
.community-icon, .community-arrow { font-size: 25px; }
.community-arrow { margin-inline-start: auto; color: var(--accent); }
.share-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px; margin-top: 20px; }
.share-row[hidden] { display: none; }
#share-status { color: var(--muted); font-size: 15px; }
#share-address { width: min(100%, 360px); padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); font: inherit; }

.footer { border-top: 1px solid var(--line); background: #eceef2; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; justify-content: space-between; padding-block: 26px; }
.footer p { color: var(--muted); font-size: 14px; line-height: 1.7; }

.paper { max-width: 840px; margin-inline: auto; padding-block: clamp(44px, 7vw, 94px); }
.paper-header { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.paper-header h1, .paper-header h2 { font-size: clamp(36px, 5.5vw, 61px); line-height: 1.14; letter-spacing: -.05em; overflow-wrap: anywhere; }
.paper-header p, .paper-section p, .paper-section li { font-size: 18px; line-height: 1.8; color: var(--muted); }
.paper-header .eyebrow { margin-bottom: 12px; font-size: 13px; }
.paper-header h1 + p, .paper-header h2 + p, .paper-section p + p { margin-top: 12px; }
.paper-abstract { margin-top: 20px; padding: 18px 20px; border-inline-start: 3px solid #7588a9; border-radius: 0 12px 12px 0; background: #eef2f8; }
.paper-abstract strong { display: block; margin-bottom: 5px; }
.whitepaper-panel { padding: clamp(19px, 5vw, 62px); border: 1px solid var(--line); border-radius: 26px; background: #fff; }
.whitepaper-panel article { max-width: 950px; margin-inline: auto; }
.whitepaper-panel > .text-link { margin-top: 14px; }
.paper-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; margin-top: 22px; }
.paper-toolbar audio { display: block; width: min(100%, 380px); }
.paper-audio-status { font-size: 15px; color: var(--muted); }
.paper-toc { display: flex; flex-wrap: wrap; column-gap: 20px; margin-block: 26px 0; padding: 8px 18px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.paper-toc a, .paper-section a { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.paper-toc a { display: inline-flex; align-items: center; min-height: 44px; font-size: 16px; }
.paper-section { padding-block: 28px; border-bottom: 1px solid var(--line); }
.paper-section h2, .whitepaper-panel .paper-section h3 { margin-bottom: 13px; font-size: clamp(25px, 4vw, 34px); line-height: 1.2; letter-spacing: -.03em; }
.paper-section h3, .paper-section h4 { margin-block: 17px 5px; font-size: 19px; line-height: 1.4; }
.whitepaper-panel .paper-section h3 { margin-top: 0; }
.paper-section ul, .paper-section ol { margin-block: 12px 0; padding-inline-start: 24px; }
.paper-section li + li { margin-top: 8px; }
.paper-sources { overflow-wrap: anywhere; }

@media (max-width: 1030px) {
  .brand-tag { display: none; }
  .mechanism-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  :root { scroll-padding-top: 115px; }
  .topbar { grid-template-columns: 1fr auto; gap: 4px 10px; padding-top: 8px; }
  .topbar nav { grid-row: 2; grid-column: 1 / -1; justify-content: center; min-height: 44px; border-top: 1px solid var(--line); gap: clamp(8px, 2.7vw, 22px); }
  .topbar nav a { display: flex; align-items: center; min-height: 42px; font-size: 14px; }
  .brand strong { font-size: 20px; }
  .brand img { width: 30px; height: 30px; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 34px; padding-block: 47px 43px; }
  .hero h1 { font-size: clamp(51px, 12vw, 74px); margin-block: 20px 18px; }
  .hero h1 > span { margin-top: 9px; }
  .hero-detail, .section-detail, .paper-header p, .paper-section p, .paper-section li { font-size: 17px; }
  .hero-visual { width: min(calc(100% - 26px), 460px); margin: 4px auto 10px; }
  .logo-surface { border-radius: 23px; }
  .hero-visual::before, .hero-visual::after { border-radius: 26px; }
  .mechanism-lead, .project, .story-grid { grid-template-columns: minmax(0, 1fr); }
  .mechanism-lead > p { justify-self: start; }
  .mechanism-grid { margin-top: 25px; }
}

@media (max-width: 580px) {
  .mechanism-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .mechanism-card { display: grid; grid-template-columns: 1fr auto; align-items: baseline; gap: 9px 12px; padding: 18px 20px; }
  .mechanism-card p { grid-column: 1 / -1; }
  .metric { margin-block: 0; }
  .community-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
}