:root {
  --navy: #071a2d;
  --navy-deep: #030d17;
  --navy-mid: #0d2943;
  --orange: #f26b3a;
  --orange-bright: #ff7949;
  --paper: #f4f1ea;
  --paper-deep: #e7e2d9;
  --ink: #11171d;
  --ink-soft: #4c5862;
  --line: #c9c6bf;
  --blue-line: rgba(141, 185, 218, .22);
  --white: #fff;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --serif: "Songti SC", "STSong", "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, .2); }
.header-shell, .hero-shell, .footer-shell { width: min(1320px, calc(100% - 64px)); margin-inline: auto; }
.header-shell { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.frontier-brand { width: 214px; height: 58px; display: flex; align-items: center; overflow: hidden; }
.frontier-brand img { display: block; width: 100%; height: auto; filter: invert(1); mix-blend-mode: screen; }
nav { display: flex; align-items: center; gap: 32px; 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; }
.home-link { padding-left: 30px; border-left: 1px solid rgba(255, 255, 255, .24); }

.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, .3), 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(242, 107, 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, .team-grid { position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(174, 207, 231, .075) 1px, transparent 1px), linear-gradient(90deg, rgba(174, 207, 231, .075) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(90deg, transparent, #000 18%, #000 84%, transparent); }
.hero-shell { min-height: 100svh; padding: 148px 0 84px; 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 .85s ease-out both; }
.hero-kicker, .section-code { margin: 0 0 26px; display: flex; align-items: center; gap: 12px; font: 600 11px/1.3 var(--mono); letter-spacing: .17em; text-transform: uppercase; }
.hero-kicker { color: #aec7da; }
.hero-kicker span { width: 8px; height: 8px; background: var(--orange); box-shadow: 0 0 0 6px rgba(242, 107, 58, .13); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 30px; font-size: clamp(64px, 6.5vw, 104px); 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: 44px 0 42px; 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, .25); transition: transform .25s ease, background .25s ease, box-shadow .25s ease; }
.report-download:hover { transform: translateY(-5px); background: #ff7d50; box-shadow: 0 26px 80px rgba(0, 0, 0, .34); }
.report-download:focus-visible, .closing-download:focus-visible, nav a:focus-visible, .frontier-brand:focus-visible, footer a:focus-visible { outline: 3px solid var(--white); 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: .96; animation: field-enter 1.2s .15s 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 40s linear infinite; }
.ring-b { inset: 22%; border-style: dashed; animation: spin 30s 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(242, 107, 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(242, 107, 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)); }

.section-shell { width: min(1180px, calc(100% - 64px)); margin-inline: auto; position: relative; }
.abstract { padding-block: 150px 170px; display: grid; grid-template-columns: .62fr 1.38fr; gap: 11%; align-items: start; }
.section-intro { position: sticky; top: 48px; }
.section-code { color: var(--orange); }
.section-code span { min-width: 34px; padding-right: 10px; color: var(--ink); border-right: 1px solid var(--line); }
.section-code.light span { color: var(--white); border-color: rgba(255, 255, 255, .3); }
h2 { margin-bottom: 28px; font-size: clamp(46px, 5.5vw, 76px); line-height: 1.02; letter-spacing: -.06em; font-weight: 850; }
.section-intro > p:not(.section-code) { max-width: 270px; color: var(--ink-soft); font-size: 13px; }
.section-rule { width: 100%; height: 124px; margin-top: 46px; position: relative; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.section-rule::before, .section-rule::after { content: ""; position: absolute; top: 0; bottom: 0; width: 1px; background: var(--line); }
.section-rule::before { left: 33%; }.section-rule::after { left: 66%; }
.section-rule i { position: absolute; width: 9px; height: 9px; left: calc(66% - 4px); top: -5px; background: var(--orange); }
.abstract-copy { counter-reset: abstract-paragraph; }
.abstract-copy > p { counter-increment: abstract-paragraph; position: relative; margin: 0; padding: 28px 0 28px 66px; color: #3d474f; border-top: 1px solid var(--line); font-family: var(--serif); font-size: 17px; line-height: 2.05; text-align: justify; }
.abstract-copy > p::before { content: counter(abstract-paragraph, decimal-leading-zero); position: absolute; left: 0; top: 34px; color: var(--orange); font: 600 10px/1 var(--mono); letter-spacing: .08em; }
.abstract-copy .lead-paragraph { padding-top: 0; color: var(--ink); border-top-color: var(--ink); font-size: 21px; line-height: 1.95; }
.abstract-copy .lead-paragraph::before { top: 8px; }
.abstract-copy .keywords { margin-top: 20px; padding: 23px 26px; color: var(--navy); background: var(--paper-deep); border: 0; font-family: var(--sans); font-size: 13px; text-align: left; }
.abstract-copy .keywords::before { display: none; }
.keywords b { margin-right: 18px; color: var(--orange); font: 700 11px var(--mono); letter-spacing: .1em; }

.team { position: relative; overflow: hidden; padding-block: 140px 150px; color: var(--white); background: var(--navy); }
.team::before { content: ""; position: absolute; width: 520px; height: 520px; right: -230px; top: 140px; border: 1px solid rgba(242, 107, 58, .22); transform: rotate(45deg); }
.team-grid { opacity: .65; mask-image: linear-gradient(90deg, transparent, #000 28%, #000); }
.team-heading { display: grid; grid-template-columns: 1fr .55fr; align-items: end; gap: 80px; padding-bottom: 60px; border-bottom: 1px solid rgba(185, 207, 222, .34); }
.team-heading h2 { margin: 0; }
.team-heading > p { margin-bottom: 8px; color: #9db4c4; font-size: 13px; }
.team-group { display: grid; grid-template-columns: .42fr 1.58fr; gap: 8%; padding-block: 54px; border-bottom: 1px solid rgba(185, 207, 222, .24); }
.team-group h3 { margin: 0; display: flex; gap: 16px; font-size: 20px; letter-spacing: -.02em; }
.team-group h3 span { margin-top: 7px; color: var(--orange-bright); font: 600 10px var(--mono); }
.member-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; column-gap: 46px; }
.member-list li { min-height: 86px; padding: 18px 0; display: grid; grid-template-columns: 92px 1fr; gap: 18px; align-items: start; border-top: 1px solid rgba(185, 207, 222, .2); }
.member-list li:nth-child(-n+2) { border-top-color: rgba(185, 207, 222, .55); }
.member-list strong { font-size: 18px; letter-spacing: .08em; }
.member-list li > span { color: #afc0cc; font-size: 13px; line-height: 1.6; }
.publishers { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; padding-top: 56px; }
.publishers > div { padding: 28px; border: 1px solid rgba(185, 207, 222, .25); background: rgba(1, 9, 16, .25); }
.publishers p { margin-bottom: 18px; color: var(--orange-bright); font: 600 10px var(--mono); letter-spacing: .12em; }
.publishers strong { font-size: 17px; line-height: 1.8; }

.closing { padding-block: 125px; background: var(--paper-deep); border-bottom: 1px solid var(--line); }
.closing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10%; align-items: end; }
.closing h2 { margin-bottom: 0; }
.closing-download { min-height: 190px; 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(-5px); background: #0b2540; }
.closing-download span { color: #93afc2; font: 600 9px var(--mono); letter-spacing: .14em; }
.closing-download strong { align-self: end; font-size: 27px; }
.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: 52px; color: #8da2b1; background: var(--navy-deep); }
.footer-shell { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 60px; }
.footer-brand { color: var(--white); font: 900 26px/1 var(--mono); font-style: italic; letter-spacing: -.05em; }
.footer-brand span { display: block; margin-top: 8px; color: #7892a5; font: 500 8px/1 var(--mono); font-style: normal; letter-spacing: .32em; }
.footer-links { display: flex; gap: 24px; }
.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(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@keyframes hero-enter { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes field-enter { from { opacity: 0; transform: scale(.94) rotate(-3deg); } to { opacity: .96; transform: none; } }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 980px) {
  .header-shell, .hero-shell, .footer-shell { width: min(100% - 40px, 760px); }
  .section-shell { width: min(100% - 40px, 760px); }
  .frontier-brand { width: 188px; }
  nav { gap: 22px; }
  .hero-shell { grid-template-columns: 1fr .58fr; gap: 10px; }
  .frontier-field { width: 470px; margin-right: -220px; opacity: .55; }
  .abstract { grid-template-columns: 1fr; gap: 70px; }
  .section-intro { position: static; }
  .section-intro > p:not(.section-code) { max-width: 500px; }
  .section-rule { display: none; }
  .team-group { grid-template-columns: 1fr; gap: 30px; }
  .footer-shell { grid-template-columns: 1fr; align-items: start; gap: 28px; }
  .legal { text-align: left; }
}

@media (max-width: 680px) {
  .report-header { border-bottom-color: rgba(201, 221, 237, .16); }
  .header-shell { min-height: 68px; width: calc(100% - 32px); }
  .frontier-brand { width: 158px; height: 47px; }
  nav a:not(.home-link) { display: none; }
  .home-link { padding-left: 0; border-left: 0; font-size: 9px; }
  .hero-shell { min-height: 100svh; width: calc(100% - 32px); padding: 100px 0 60px; display: flex; align-items: center; }
  .hero-copy { width: 100%; }
  .hero-kicker { margin-bottom: 18px; font-size: 9px; }
  h1 { margin-bottom: 22px; font-size: clamp(45px, 14vw, 60px); }
  .hero-lead { max-width: 350px; font-size: 14px; line-height: 1.72; }
  .report-download { min-height: 88px; margin: 32px 0 34px; 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: .25; }
  .hero-index { left: 16px; right: 16px; bottom: 16px; }
  .hero-index span:last-child { display: none; }
  .hero-index { grid-template-columns: auto 1fr; }
  .section-shell { width: calc(100% - 32px); }
  .abstract { padding-block: 92px 105px; gap: 48px; }
  .section-code { margin-bottom: 18px; font-size: 9px; }
  h2 { font-size: 46px; }
  .abstract-copy > p { padding: 24px 0 24px 38px; font-size: 15px; line-height: 1.95; text-align: left; }
  .abstract-copy > p::before { top: 31px; }
  .abstract-copy .lead-paragraph { font-size: 17px; }
  .abstract-copy .lead-paragraph::before { top: 6px; }
  .abstract-copy .keywords { padding: 20px; font-size: 12px; }
  .keywords b { display: block; margin-bottom: 8px; }
  .team { padding-block: 92px 100px; }
  .team-heading { grid-template-columns: 1fr; gap: 15px; padding-bottom: 40px; }
  .team-heading > p { margin: 0; }
  .team-group { padding-block: 42px; }
  .team-group h3 { font-size: 18px; }
  .member-list { grid-template-columns: 1fr; }
  .member-list li, .member-list li:nth-child(-n+2) { min-height: auto; grid-template-columns: 76px 1fr; border-top-color: rgba(185, 207, 222, .22); }
  .member-list li:first-child { border-top-color: rgba(185, 207, 222, .55); }
  .member-list strong { font-size: 16px; }
  .member-list li > span { font-size: 12px; }
  .publishers { grid-template-columns: 1fr; gap: 16px; padding-top: 42px; }
  .publishers > div { padding: 23px 20px; }
  .publishers strong { font-size: 14px; }
  .closing { padding-block: 86px; }
  .closing-grid { grid-template-columns: 1fr; gap: 50px; }
  .closing-download { min-height: 158px; padding: 24px; }
  .closing-download strong { font-size: 23px; }
  .closing-download i { width: 54px; }
  footer { padding-block: 44px; }
}

@media (max-height: 700px) and (max-width: 680px) {
  .hero-shell { padding-top: 82px; padding-bottom: 42px; }
  .hero-kicker { margin-bottom: 12px; }
  h1 { margin-bottom: 16px; font-size: 42px; }
  .hero-lead { font-size: 12px; line-height: 1.55; }
  .report-download { min-height: 76px; margin: 22px 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; }
}