:root {
  --navy: #071a2d;
  --navy-deep: #020c15;
  --navy-mid: #0d2943;
  --orange: #ed6a3a;
  --orange-bright: #ff7a49;
  --paper: #f3eee4;
  --paper-deep: #e7dfd1;
  --paper-shadow: #d8cdbb;
  --ink: #182029;
  --ink-soft: #5b615f;
  --rule: #aaa08f;
  --white: #fff;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", serif;
  --mono: "Bahnschrift", "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.72; -webkit-font-smoothing: antialiased; }
body::selection { color: var(--white); background: var(--orange); }
a { color: inherit; }
img { max-width: 100%; }
.skip-link { position: fixed; top: -100px; left: 1rem; z-index: 100; padding: .75rem 1rem; color: var(--white); background: var(--orange); }
.skip-link:focus { top: 1rem; }

.report-header { position: absolute; inset: 0 0 auto; z-index: 50; color: var(--white); border-bottom: 1px solid rgba(201, 221, 237, .18); }
.header-shell, .hero-shell, .footer-shell { width: min(1320px, calc(100% - 64px)); margin-inline: auto; }
.header-shell { min-height: 124px; display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.frontier-brand { display: block; flex: 0 0 auto; width: 220px; aspect-ratio: 1600 / 900; }
.frontier-brand img { display: block; width: 100%; height: auto; aspect-ratio: 1600 / 900; object-fit: contain; filter: invert(1); mix-blend-mode: screen; }
nav { display: flex; align-items: center; gap: 36px; font: 600 12px/1.2 var(--mono); letter-spacing: .08em; }
nav a { position: relative; text-decoration: none; }
nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 1px; background: var(--orange); transition: right .22s ease; }
nav a:hover::after, nav a:focus-visible::after { right: 0; }

.hero { min-height: 100svh; position: relative; isolation: isolate; overflow: hidden; color: var(--white); background: var(--navy-deep); }
.hero::before { content: ""; position: absolute; z-index: -3; inset: 0; background: radial-gradient(circle at 78% 44%, rgba(23, 101, 157, .29), transparent 34%), linear-gradient(120deg, var(--navy-deep) 8%, var(--navy) 62%, #0a2035 100%); }
.hero::after { content: ""; position: absolute; z-index: -2; width: 58vw; height: 58vw; right: -20vw; top: -23vw; border: 1px solid rgba(237, 106, 58, .2); border-radius: 50%; box-shadow: 0 0 0 8vw rgba(45, 124, 181, .035), 0 0 0 17vw rgba(45, 124, 181, .025); }
.hero-grid { position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(174, 207, 231, .07) 1px, transparent 1px), linear-gradient(90deg, rgba(174, 207, 231, .07) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(90deg, transparent, #000 18%, #000 84%, transparent); }
.hero-shell { min-height: 100svh; padding: 152px 0 82px; display: grid; grid-template-columns: 1.03fr .97fr; gap: 70px; align-items: center; }
.hero-copy { position: relative; z-index: 2; max-width: 720px; animation: hero-enter .75s ease-out both; }
.hero-kicker { margin: 0 0 24px; display: flex; align-items: center; gap: 12px; color: #aec7da; font: 600 11px/1.3 var(--mono); letter-spacing: .17em; text-transform: uppercase; }
.hero-kicker span { width: 8px; height: 8px; background: var(--orange); box-shadow: 0 0 0 6px rgba(237, 106, 58, .13); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 26px; font-size: clamp(64px, 6.5vw, 102px); line-height: .94; letter-spacing: -.065em; font-weight: 900; }
h1 em { color: var(--orange-bright); font-style: normal; }
.hero-lead { max-width: 650px; margin-bottom: 0; color: #c6d5df; font-size: 18px; line-height: 1.85; }
.report-download { width: min(590px, 100%); min-height: 112px; margin: 42px 0 40px; padding: 20px 24px; display: grid; grid-template-columns: 110px 1fr 52px; align-items: center; gap: 18px; color: var(--navy-deep); background: var(--orange); border: 1px solid var(--orange-bright); text-decoration: none; box-shadow: 0 20px 70px rgba(0, 0, 0, .24); transition: transform .25s ease, background .25s ease, box-shadow .25s ease; }
.report-download:hover { transform: translateY(-4px); background: #ff7d50; box-shadow: 0 26px 80px rgba(0, 0, 0, .32); }
.report-download:focus-visible, .closing-download:focus-visible, nav a:focus-visible, .frontier-brand:focus-visible, footer a:focus-visible { outline: 3px solid var(--orange); outline-offset: 5px; }
.download-meta { font: 600 10px/1.35 var(--mono); letter-spacing: .1em; }
.download-meta b { display: block; margin-top: 5px; font-size: 14px; }
.report-download strong { font-size: 22px; letter-spacing: -.02em; }
.download-arrow { width: 48px; height: 48px; display: grid; place-items: center; border: 1px solid rgba(3, 13, 23, .44); font: 400 27px/1 var(--mono); }
.hero-notes { display: flex; align-items: center; flex-wrap: wrap; gap: 13px 24px; color: #9db5c7; font: 500 10px/1.4 var(--mono); letter-spacing: .12em; }
.hero-notes span + span::before { content: "/"; margin-right: 24px; color: var(--orange); }

.frontier-field { position: relative; width: min(100%, 590px); aspect-ratio: 1; justify-self: end; opacity: .9; animation: field-enter 1s .1s ease-out both; }
.frontier-field::before { content: ""; position: absolute; inset: 8%; border: 1px solid rgba(166, 201, 226, .2); transform: rotate(45deg); }
.field-ring { position: absolute; border: 1px solid rgba(166, 201, 226, .37); border-radius: 50%; }
.ring-a { inset: 5%; border-right-color: var(--orange); animation: spin 48s linear infinite; }
.ring-b { inset: 22%; border-style: dashed; animation: spin 38s linear infinite reverse; }
.ring-c { inset: 36%; border-color: rgba(166, 201, 226, .6); }
.field-axis { position: absolute; background: rgba(166, 201, 226, .25); }
.axis-x { top: 50%; left: 0; right: 0; height: 1px; }
.axis-y { left: 50%; top: 0; bottom: 0; width: 1px; }
.field-core { position: absolute; inset: 40%; display: grid; place-content: center; text-align: center; color: var(--white); background: var(--navy-deep); border: 1px solid var(--orange); transform: rotate(45deg); box-shadow: 0 0 50px rgba(237, 106, 58, .15); }
.field-core span, .field-core small { transform: rotate(-45deg); }
.field-core span { font: 800 29px/1 var(--mono); letter-spacing: .08em; }
.field-core small { margin-top: 8px; color: #89a7bc; font: 500 7px/1.4 var(--mono); letter-spacing: .08em; }
.field-point { position: absolute; display: flex; align-items: center; gap: 9px; color: #b5c9d7; font: 500 9px/1 var(--mono); letter-spacing: .12em; }
.field-point i { width: 7px; height: 7px; background: var(--orange); box-shadow: 0 0 0 5px rgba(237, 106, 58, .13); }
.point-a { top: 15%; left: 24%; }
.point-b { top: 49%; right: -2%; }
.point-c { bottom: 15%; left: 23%; }
.field-coordinate { position: absolute; right: 0; bottom: -1%; margin: 0; text-align: right; color: #69869a; font: 500 8px/1.8 var(--mono); letter-spacing: .12em; }
.hero-index { position: absolute; left: 32px; right: 32px; bottom: 28px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 18px; color: #607d91; font: 500 8px/1 var(--mono); letter-spacing: .16em; }
.hero-index i { height: 1px; background: linear-gradient(90deg, var(--orange), rgba(125, 158, 181, .2)); }

.paper-section { position: relative; background-color: var(--paper); background-image: radial-gradient(circle at 20% 10%, rgba(111, 91, 61, .035) 0 1px, transparent 1.5px), radial-gradient(circle at 72% 64%, rgba(111, 91, 61, .025) 0 1px, transparent 1.5px); background-size: 31px 31px, 43px 43px; }
.paper-shell { width: min(1040px, calc(100% - 64px)); margin-inline: auto; position: relative; }
.abstract { padding-block: 148px 162px; }
.paper-heading { max-width: 820px; margin: 0 auto 72px; text-align: center; }
.paper-running-head { margin: 0 0 28px; color: var(--orange); font: 600 10px/1.5 var(--mono); letter-spacing: .18em; text-transform: uppercase; }
.paper-heading h2, .team-heading h2 { margin: 0; font-family: var(--serif); font-size: clamp(42px, 4.4vw, 58px); line-height: 1.25; letter-spacing: .16em; font-weight: 700; }
.paper-source { margin: 24px 0 0; color: var(--ink-soft); font-family: var(--serif); font-size: 14px; letter-spacing: .08em; }
.abstract-copy { max-width: 820px; margin-inline: auto; font-family: var(--serif); }
.abstract-copy > p { margin: 0 0 .95em; padding: 0; color: #2a2d2d; border: 0; font-family: var(--serif); font-size: 17px; font-weight: 400; line-height: 2.1; letter-spacing: .025em; text-align: justify; text-justify: inter-ideograph; text-indent: 2em; }
.abstract-copy > p::before { display: none; }
.abstract-copy .keywords { margin-top: 1.45em; color: #2a2d2d; background: transparent; }
.abstract-copy .keywords b { color: var(--ink); font-family: var(--serif); font-size: inherit; letter-spacing: inherit; }

.team { padding-block: 132px 140px; color: var(--ink); border-top: 1px solid var(--paper-shadow); }
.team-shell { width: min(1120px, calc(100% - 64px)); }
.team-heading { display: grid; grid-template-columns: 1fr .55fr; align-items: end; gap: 80px; padding-bottom: 48px; border-bottom: 1px solid var(--rule); }
.team-heading .paper-running-head { margin-bottom: 22px; }
.team-heading > p { margin-bottom: 8px; color: var(--ink-soft); font-family: var(--serif); font-size: 13px; }
.team-group { display: grid; grid-template-columns: .42fr 1.58fr; gap: 8%; padding-block: 48px; border-bottom: 1px solid rgba(133, 123, 106, .5); }
.team-group h3 { margin: 0; display: flex; gap: 14px; font-family: var(--serif); font-size: 19px; font-weight: 700; letter-spacing: .04em; }
.team-group h3 span { margin-top: 6px; color: var(--orange); font: 600 10px/1 var(--mono); }
.member-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; column-gap: 52px; row-gap: 4px; }
.member-list li { min-height: 76px; padding: 12px 0; display: grid; grid-template-columns: 94px 1fr; gap: 18px; align-items: start; }
.member-list strong { font-family: var(--serif); font-size: 17px; letter-spacing: .08em; }
.member-list li > span { color: var(--ink-soft); font-family: var(--serif); font-size: 13px; line-height: 1.75; }
.publishers { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; padding-top: 54px; }
.publishers > div { padding-top: 22px; border-top: 2px solid var(--ink); }
.publishers p { margin-bottom: 14px; color: var(--orange); font: 600 10px/1.4 var(--mono); letter-spacing: .12em; }
.publishers strong { font-family: var(--serif); font-size: 16px; font-weight: 600; line-height: 1.9; }

.closing { padding-block: 112px; background-color: var(--paper-deep); border-top: 1px solid var(--paper-shadow); border-bottom: 1px solid var(--paper-shadow); }
.closing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10%; align-items: end; }
.closing h2 { margin: 0; font-family: var(--serif); font-size: clamp(44px, 5vw, 68px); line-height: 1.16; letter-spacing: -.035em; }
.closing-download { min-height: 184px; padding: 30px 32px; display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto 1fr; color: var(--white); background: var(--navy); text-decoration: none; transition: transform .25s ease, background .25s ease; }
.closing-download:hover { transform: translateY(-4px); background: #0b2540; }
.closing-download span { color: #93afc2; font: 600 9px/1.4 var(--mono); letter-spacing: .14em; }
.closing-download strong { align-self: end; font-family: var(--serif); font-size: 25px; }
.closing-download i { grid-row: 1 / 3; grid-column: 2; align-self: stretch; width: 68px; display: grid; place-items: end center; border-left: 1px solid rgba(255, 255, 255, .2); color: var(--orange-bright); font: normal 34px/1 var(--mono); }

footer { padding-block: 44px; color: #4e514e; background: #ddd4c5; }
.footer-shell { display: grid; grid-template-columns: 280px 1fr auto; align-items: center; gap: 54px; }
.footer-brand { display: block; width: 280px; aspect-ratio: 1600 / 900; }
.footer-brand img { display: block; width: 100%; height: auto; aspect-ratio: 1600 / 900; object-fit: contain; mix-blend-mode: multiply; }
.footer-links { display: flex; justify-content: center; gap: 28px; }
.footer-links a, .legal a { font-size: 11px; text-decoration: none; }
.legal { text-align: right; }
.legal p { margin: 0 0 6px; font-size: 11px; }

.reveal { opacity: 0; transform: translateY(12px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: none; }
@keyframes hero-enter { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes field-enter { from { opacity: 0; transform: scale(.96) rotate(-2deg); } to { opacity: .9; transform: none; } }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 980px) {
  .header-shell, .hero-shell, .footer-shell { width: min(100% - 40px, 760px); }
  .paper-shell, .team-shell { width: min(100% - 40px, 760px); }
  .frontier-brand { width: 190px; }
  nav { gap: 24px; }
  .hero-shell { grid-template-columns: 1fr .58fr; gap: 10px; }
  .frontier-field { width: 470px; margin-right: -220px; opacity: .52; }
  .team-group { grid-template-columns: 1fr; gap: 30px; }
  .footer-shell { grid-template-columns: 220px 1fr; gap: 30px; }
  .footer-brand { width: 220px; }
  .footer-links { justify-content: flex-end; }
  .legal { grid-column: 1 / -1; text-align: left; display: flex; justify-content: space-between; gap: 24px; }
}

@media (max-width: 680px) {
  .report-header { border-bottom-color: rgba(201, 221, 237, .14); }
  .header-shell { min-height: 92px; width: calc(100% - 32px); gap: 16px; }
  .frontier-brand { width: 152px; }
  nav { gap: 14px; font-size: 9px; letter-spacing: .04em; }
  .hero-shell { min-height: 100svh; width: calc(100% - 32px); padding: 108px 0 50px; display: flex; align-items: center; }
  .hero-copy { width: 100%; }
  .hero-kicker { margin-bottom: 16px; font-size: 9px; }
  h1 { margin-bottom: 20px; font-size: clamp(45px, 14vw, 58px); }
  .hero-lead { max-width: 350px; font-size: 14px; line-height: 1.72; }
  .report-download { min-height: 88px; margin: 30px 0 30px; padding: 14px 15px; grid-template-columns: 68px 1fr 42px; gap: 10px; }
  .download-meta { font-size: 7px; }
  .download-meta b { font-size: 11px; }
  .report-download strong { font-size: 17px; line-height: 1.3; }
  .download-arrow { width: 40px; height: 40px; font-size: 23px; }
  .hero-notes { max-width: 340px; gap: 8px 12px; font-size: 8px; }
  .hero-notes span + span::before { margin-right: 12px; }
  .frontier-field { position: absolute; z-index: -1; width: 470px; right: -280px; top: 20%; margin: 0; opacity: .22; }
  .hero-index { left: 16px; right: 16px; bottom: 16px; grid-template-columns: auto 1fr; }
  .hero-index span:last-child { display: none; }
  .paper-shell, .team-shell { width: calc(100% - 32px); }
  .abstract { padding-block: 86px 96px; }
  .paper-heading { margin-bottom: 52px; }
  .paper-running-head { margin-bottom: 20px; font-size: 8px; line-height: 1.7; }
  .paper-heading h2, .team-heading h2 { font-size: 40px; }
  .paper-source { margin-top: 18px; font-size: 12px; }
  .abstract-copy > p { margin-bottom: 1em; font-size: 15.5px; line-height: 2; letter-spacing: .015em; text-align: justify; text-indent: 2em; }
  .team { padding-block: 86px 94px; }
  .team-heading { grid-template-columns: 1fr; gap: 16px; padding-bottom: 38px; }
  .team-heading > p { margin: 0; }
  .team-group { padding-block: 38px; }
  .team-group h3 { font-size: 17px; }
  .member-list { grid-template-columns: 1fr; }
  .member-list li { min-height: auto; grid-template-columns: 78px 1fr; padding: 10px 0; }
  .member-list strong { font-size: 16px; }
  .member-list li > span { font-size: 12.5px; }
  .publishers { grid-template-columns: 1fr; gap: 34px; padding-top: 42px; }
  .publishers strong { font-size: 14px; }
  .closing { padding-block: 82px; }
  .closing-grid { grid-template-columns: 1fr; gap: 46px; }
  .closing h2 { font-size: 43px; }
  .closing-download { min-height: 154px; padding: 24px; }
  .closing-download strong { font-size: 22px; }
  .closing-download i { width: 54px; }
  footer { padding-block: 34px 40px; }
  .footer-shell { width: calc(100% - 32px); grid-template-columns: 1fr; gap: 22px; }
  .footer-brand { width: 210px; }
  .footer-links { justify-content: flex-start; }
  .legal { grid-column: auto; display: block; text-align: left; }
}

@media (max-height: 700px) and (max-width: 680px) {
  .header-shell { min-height: 76px; }
  .frontier-brand { width: 126px; }
  .hero-shell { padding-top: 82px; padding-bottom: 40px; }
  .hero-kicker { margin-bottom: 11px; }
  h1 { margin-bottom: 14px; font-size: 42px; }
  .hero-lead { font-size: 12px; line-height: 1.52; }
  .report-download { min-height: 76px; margin: 20px 0; }
  .hero-notes { font-size: 7px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}