/* 银翼航迹：以参考站的页面职责、媒体尺度与滚动节奏重构，全部规则限定在 airframe 主题。 */
body[data-theme="airframe"] { --reference-pad: max(24px, calc((100vw - var(--max)) / 2)); }

body[data-theme="airframe"][data-page="home"] .site-header,
body[data-theme="airframe"][data-page="products"] .site-header { position: fixed; width: 100%; }

body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed),
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) {
  color: #fff;
  border-color: rgba(255, 255, 255, .2);
  background: linear-gradient(180deg, rgba(8, 12, 14, .42), transparent);
  backdrop-filter: none;
}

body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .desktop-nav a,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .desktop-nav a,
body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .prototype-badge,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .prototype-badge {
  color: rgba(255, 255, 255, .76);
  border-color: rgba(255, 255, 255, .28);
}

body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .desktop-nav a:hover,
body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .desktop-nav a.active,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .desktop-nav a:hover,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .desktop-nav a.active { color: #fff; }

.reference-section {
  position: relative;
  padding: 126px var(--reference-pad);
  color: var(--ink);
  background: var(--paper);
}

.reference-section + .reference-section { border-top: 1px solid var(--line); }

.reference-section-label {
  width: min(100%, var(--max));
  margin: 0 auto 72px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 76px 1fr;
  align-items: end;
}

.reference-section-label span { font: 720 15px/1 var(--display); }
.reference-section-label p { margin: 0; color: var(--faint); font: 650 9px/1 var(--display); letter-spacing: .16em; }

.reference-hero,
.reference-products-hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  color: #fff;
  background: #111618;
}

.reference-hero-media,
.reference-hero-media img,
.reference-products-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; }
.reference-hero-media img,
.reference-products-hero > img { object-fit: cover; object-position: center; }

.reference-hero-media > div,
.reference-products-hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 9, 12, .72), rgba(5, 9, 12, .18) 58%, rgba(5, 9, 12, .06)), linear-gradient(0deg, rgba(5, 9, 12, .56), transparent 58%);
}

.reference-hero-rail {
  position: absolute;
  z-index: 2;
  top: calc(var(--header-height) + 30px);
  right: var(--reference-pad);
  left: var(--reference-pad);
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, .42);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: rgba(255, 255, 255, .62);
  font: 650 9px/1 var(--display);
  letter-spacing: .15em;
}

.reference-hero-copy {
  position: absolute;
  z-index: 2;
  right: var(--reference-pad);
  bottom: 10vh;
  left: var(--reference-pad);
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: 80px;
  align-items: end;
}

.reference-hero-copy > p { grid-column: 1 / -1; margin: 0 0 -34px; color: rgba(255, 255, 255, .62); font: 650 10px/1 var(--display); letter-spacing: .16em; }
.reference-hero-copy h1 { margin: 0; font: 760 clamp(74px, 10vw, 154px)/.84 var(--heading); letter-spacing: -.075em; text-shadow: 0 3px 26px rgba(0, 0, 0, .26); }
.reference-hero-copy > div { padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .4); }
.reference-hero-copy > div p { margin: 0; color: rgba(255, 255, 255, .8); font-size: 16px; line-height: 1.8; }
.reference-hero-copy a { margin-top: 28px; display: inline-flex; gap: 16px; color: #fff; text-decoration: none; font-size: 13px; font-weight: 700; }
.reference-hero-copy a span { color: var(--accent); }
.reference-media-credit { position: absolute; z-index: 2; right: var(--reference-pad); bottom: 24px; color: rgba(255, 255, 255, .58); font-size: 10px; }
.reference-scroll-cue { position: absolute; z-index: 2; right: var(--reference-pad); top: 49%; display: flex; align-items: center; gap: 16px; color: rgba(255, 255, 255, .54); font: 650 9px/1 var(--display); letter-spacing: .16em; transform: rotate(90deg) translateX(50%); transform-origin: right center; }
.reference-scroll-cue i { position: relative; width: 76px; height: 1px; overflow: hidden; background: rgba(255, 255, 255, .28); }
.reference-scroll-cue i::after { content: ""; position: absolute; width: 32px; height: 1px; background: #fff; animation: reference-cue 2.4s ease-in-out infinite; }
@keyframes reference-cue { 0%, 100% { transform: translateX(-34px); } 55% { transform: translateX(78px); } }

.reference-mission { background: #f5f5f1; }
.reference-mission-body,
.reference-product-intro,
.reference-roadmap-head,
.reference-history-head,
.reference-news-head,
.reference-products-architecture-head,
.reference-propulsion-head,
.reference-aircraft-head,
.reference-service-head {
  width: min(100%, var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(280px, .72fr);
  gap: 88px;
  align-items: end;
}

.reference-mission-body h2,
.reference-product-intro h2,
.reference-roadmap-head h2,
.reference-history-head h2,
.reference-products-architecture-head h2,
.reference-propulsion-head h2,
.reference-aircraft-head h2 { margin: 0; font: 730 clamp(47px, 6vw, 88px)/1.04 var(--heading); letter-spacing: -.045em; }

.reference-mission-body > div p,
.reference-product-intro > p,
.reference-roadmap-head > p,
.reference-history-head > p,
.reference-products-architecture-head > p,
.reference-propulsion-head > p,
.reference-aircraft-head > p,
.reference-service-head > p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.85; }
.reference-mission-body a { margin-top: 28px; display: inline-block; color: var(--ink); text-decoration: none; font-size: 13px; font-weight: 700; }
.reference-mission-body a span { color: var(--accent); }

.reference-product { overflow: hidden; background: #ebebe7; }
.reference-product-intro { margin-bottom: 68px; }
.reference-product-stage { position: relative; width: min(100%, 1420px); min-height: min(740px, 71vw); margin: 0 auto; overflow: hidden; color: #fff; background: #141918; }
.reference-product-word { position: absolute; z-index: 1; right: 3%; top: 6%; margin: 0; color: rgba(255, 255, 255, .075); font: 800 clamp(150px, 21vw, 320px)/.8 var(--heading); letter-spacing: -.1em; }
.reference-product-media,
.reference-product-media figure,
.reference-product-media img { position: absolute; inset: 0; width: 100%; height: 100%; }
.reference-product-media figure { margin: 0; opacity: 0; transform: scale(1.035); transition: opacity .65s ease, transform 1.1s cubic-bezier(.2, .7, .2, 1); }
.reference-product-media figure.active { opacity: 1; transform: scale(1); }
.reference-product-media img { object-fit: cover; }
.reference-product-media figure::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7, 11, 12, .7), transparent 58%), linear-gradient(0deg, rgba(7, 11, 12, .6), transparent 56%); }
.reference-product-media [data-reference-product-media="power"] { background: #ecece7; }
.reference-product-media [data-reference-product-media="power"] img { padding: 7%; object-fit: contain; mix-blend-mode: multiply; }
.reference-product-media [data-reference-product-media="power"]::after { background: linear-gradient(90deg, rgba(8, 12, 12, .78), rgba(8, 12, 12, .08) 62%); }
.reference-product-media figcaption { position: absolute; z-index: 3; right: 20px; bottom: 18px; color: rgba(255, 255, 255, .62); font-size: 10px; }
.reference-product-copy { position: absolute; z-index: 4; left: 34px; bottom: 34px; width: min(430px, calc(100% - 68px)); min-height: 305px; padding: 28px 30px; background: rgba(10, 14, 15, .84); backdrop-filter: blur(16px); }
.reference-product-copy article { display: none; }
.reference-product-copy article.active { display: block; animation: reference-copy-in .5s ease both; }
.reference-product-copy small { color: var(--accent); font: 650 9px/1 var(--display); letter-spacing: .14em; }
.reference-product-copy article > span { float: right; color: rgba(255, 255, 255, .4); font: 650 10px/1 var(--display); }
.reference-product-copy h3 { margin: 24px 0 14px; font: 720 clamp(28px, 3vw, 43px)/1.12 var(--heading); }
.reference-product-copy p { margin: 0; color: rgba(255, 255, 255, .68); font-size: 13px; line-height: 1.75; }
.reference-product-copy b { margin-top: 18px; display: block; color: #fff; font-size: 12px; }
.reference-product-copy a { margin-top: 22px; display: inline-block; color: #fff; text-decoration: none; font-size: 12px; font-weight: 700; }
@keyframes reference-copy-in { from { opacity: 0; transform: translateY(12px); } }

.reference-product-controls { width: min(100%, 1420px); margin: 0 auto; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line); border-top: 0; background: #f6f6f2; }
.reference-product-controls button { min-height: 112px; padding: 20px 22px; border: 0; border-right: 1px solid var(--line); color: var(--ink); background: transparent; display: grid; grid-template-columns: 32px 1fr; gap: 7px 12px; text-align: left; cursor: pointer; }
.reference-product-controls button:last-child { border-right: 0; }
.reference-product-controls button span { grid-row: 1 / span 2; padding-top: 5px; color: var(--faint); font: 700 10px/1 var(--display); }
.reference-product-controls button small { color: var(--faint); font: 650 9px/1 var(--display); letter-spacing: .12em; }
.reference-product-controls button b { font-size: 18px; }
.reference-product-controls button.active { color: #fff; background: #151918; }
.reference-product-controls button.active span,
.reference-product-controls button.active small { color: var(--accent); }

.reference-roadmap { background: #f8f8f5; }
.reference-roadmap-head { margin-bottom: 70px; }
.reference-roadmap-grid { width: min(100%, var(--max)); margin: 0 auto; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; list-style: none; }
.reference-roadmap-grid li { min-width: 0; }
.reference-roadmap-grid a { height: 100%; color: var(--ink); background: #ebebe6; display: flex; flex-direction: column; text-decoration: none; }
.reference-roadmap-grid figure { position: relative; margin: 0; aspect-ratio: 4 / 5; overflow: hidden; background: #d8d9d4; }
.reference-roadmap-grid img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2, .7, .2, 1); }
.reference-roadmap-grid a:hover img { transform: scale(1.035); }
.reference-roadmap-grid figcaption { position: absolute; right: 12px; bottom: 10px; padding: 6px 8px; color: rgba(255, 255, 255, .76); background: rgba(7, 10, 11, .62); font-size: 9px; }
.reference-roadmap-grid a > div { min-height: 260px; padding: 25px 26px; display: grid; grid-template-columns: 30px 1fr; align-content: start; }
.reference-roadmap-grid div > span { grid-row: 1 / span 5; color: var(--accent); font: 700 10px/1 var(--display); }
.reference-roadmap-grid small { color: var(--faint); font: 650 9px/1 var(--display); letter-spacing: .13em; }
.reference-roadmap-grid h3 { margin: 16px 0 8px; font: 740 46px/1 var(--heading); }
.reference-roadmap-grid b { color: var(--muted); font-size: 12px; }
.reference-roadmap-grid p { margin: 20px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.reference-roadmap-grid i { margin-top: 22px; color: var(--ink); font-size: 11px; font-style: normal; font-weight: 700; }

.reference-history { padding-right: 0; padding-bottom: 0; padding-left: 0; background: #ecece7; }
.reference-history > .reference-section-label,
.reference-history-head { width: min(calc(100% - 48px), var(--max)); }
.reference-history-head { margin-bottom: 70px; }
.reference-timeline-track { position: relative; height: 420vh; border-top: 1px solid var(--line); }
.reference-timeline-pin { position: sticky; top: 0; height: 100svh; min-height: 680px; padding: calc(var(--header-height) + 32px) max(28px, calc((100vw - 1420px) / 2)) 34px; overflow: hidden; display: grid; grid-template-columns: 122px minmax(0, 1fr) 208px; gap: 34px; align-items: center; background: #f7f7f3; }
.reference-timeline-years,
.reference-timeline-milestones { margin: 0; padding: 0; list-style: none; display: grid; align-content: center; }
.reference-timeline-years li { opacity: .18; transition: opacity .3s ease, transform .3s ease; }
.reference-timeline-years li.active { opacity: 1; transform: translateX(9px); }
.reference-timeline-years button { min-height: 55px; padding: 0; border: 0; color: var(--ink); background: transparent; font: 720 clamp(27px, 3vw, 44px)/1 var(--display); letter-spacing: -.045em; cursor: pointer; }
.reference-timeline-stage { position: relative; min-width: 0; height: min(650px, calc(100svh - var(--header-height) - 82px)); }
.reference-timeline-stage article { position: absolute; inset: 0; opacity: 0; pointer-events: none; display: grid; grid-template-rows: minmax(0, 1fr) auto; transition: opacity .5s ease; }
.reference-timeline-stage article.active { opacity: 1; pointer-events: auto; }
.reference-timeline-stage figure { position: relative; width: 100%; min-height: 0; margin: 0; overflow: hidden; background: #111617; }
.reference-timeline-stage figure img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.reference-timeline-stage figcaption { position: absolute; right: 12px; bottom: 10px; padding: 6px 8px; color: rgba(255, 255, 255, .76); background: rgba(5, 9, 10, .68); font-size: 9px; }
.reference-timeline-stage article > div { padding: 20px 0 0; display: grid; grid-template-columns: 70px 1fr auto; gap: 6px 24px; }
.reference-timeline-stage time { color: var(--accent); font: 720 16px/1 var(--display); }
.reference-timeline-stage article > div > span { justify-self: end; color: var(--faint); font: 650 9px/1 var(--display); letter-spacing: .12em; }
.reference-timeline-stage h3 { grid-column: 2 / -1; margin: -5px 0 8px; font: 720 clamp(30px, 3.3vw, 48px)/1.08 var(--heading); }
.reference-timeline-stage p { grid-column: 2 / -1; max-width: 760px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.reference-timeline-milestones li { min-height: 66px; padding: 11px 0; border-bottom: 1px solid var(--line); opacity: .18; display: grid; grid-template-columns: 32px 1fr; gap: 10px; align-items: center; transition: opacity .3s ease, transform .3s ease; }
.reference-timeline-milestones li.active { opacity: 1; transform: translateX(-9px); }
.reference-timeline-milestones span { color: var(--accent); font: 700 9px/1 var(--display); }
.reference-timeline-milestones b { font-size: 12px; line-height: 1.45; }
.reference-timeline-progress { position: absolute; top: calc(var(--header-height) + 32px); bottom: 34px; left: calc(max(28px, (100vw - 1420px) / 2) + 139px); width: 1px; background: var(--line); }
.reference-timeline-progress i { display: block; width: 100%; height: 0; background: var(--accent); }

.reference-newsroom { background: #f7f7f3; }
.reference-news-head { margin-bottom: 50px; align-items: center; }
.reference-news-head h2,
.reference-service-head h2 { margin: 0; font: 730 clamp(42px, 5vw, 72px)/1.05 var(--heading); letter-spacing: -.04em; }
.reference-news-head a { justify-self: end; color: var(--ink); text-decoration: none; font-size: 12px; font-weight: 700; }
.reference-newsroom > ol { width: min(100%, var(--max)); margin: 0 auto; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.reference-newsroom li { border-bottom: 1px solid var(--line); }
.reference-newsroom li > a { min-height: 180px; padding: 18px 0; color: var(--ink); display: grid; grid-template-columns: 260px minmax(0, 1fr) 28px; gap: 30px; align-items: center; text-decoration: none; }
.reference-newsroom figure { position: relative; height: 144px; margin: 0; overflow: hidden; background: #d9dad5; }
.reference-newsroom img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.reference-newsroom a:hover img { transform: scale(1.03); }
.reference-newsroom li div { display: grid; grid-template-columns: auto 1fr; gap: 10px 22px; align-items: center; }
.reference-newsroom li div > span { color: var(--accent); font-size: 11px; font-weight: 700; }
.reference-newsroom time { color: var(--faint); font-size: 10px; }
.reference-newsroom h3 { grid-column: 1 / -1; margin: 2px 0 0; font: 710 clamp(22px, 2.4vw, 34px)/1.24 var(--heading); }
.reference-newsroom li p { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 11px; }

/* 产品页：动力演进与三型飞行器路线。 */
.reference-products-hero > img { object-position: center 56%; }
.reference-products-hero-copy { position: absolute; z-index: 2; top: 25vh; right: var(--reference-pad); left: var(--reference-pad); }
.reference-products-hero-copy > p:first-child { margin: 0 0 24px; color: rgba(255, 255, 255, .64); font: 650 10px/1 var(--display); letter-spacing: .16em; }
.reference-products-hero-copy h1 { max-width: 1020px; margin: 0; font: 760 clamp(62px, 8.5vw, 132px)/.92 var(--heading); letter-spacing: -.06em; }
.reference-products-hero-copy > p:last-child { max-width: 650px; margin: 32px 0 0; color: rgba(255, 255, 255, .78); font-size: 16px; line-height: 1.8; }
.reference-products-anchor { position: absolute; z-index: 3; right: var(--reference-pad); bottom: 0; left: var(--reference-pad); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid rgba(255, 255, 255, .38); background: rgba(7, 11, 13, .38); backdrop-filter: blur(12px); }
.reference-products-anchor a { min-height: 94px; padding: 18px 20px; border-right: 1px solid rgba(255, 255, 255, .2); color: #fff; display: grid; grid-template-columns: 28px 1fr; gap: 5px 10px; text-decoration: none; }
.reference-products-anchor a:last-child { border-right: 0; }
.reference-products-anchor span { grid-row: 1 / span 2; color: var(--accent); font: 700 9px/1 var(--display); }
.reference-products-anchor b { font-size: 15px; }
.reference-products-anchor small { color: rgba(255, 255, 255, .56); font-size: 10px; }

.reference-products-architecture { background: #f6f6f2; }
.reference-products-architecture-head { margin-bottom: 68px; }
.reference-products-map { width: min(100%, var(--max)); margin: 0 auto; display: grid; grid-template-columns: minmax(250px, .72fr) minmax(0, 1.28fr); gap: 120px; }
.reference-products-source,
.reference-products-map li { position: relative; min-height: 165px; padding: 25px 26px; border: 1px solid var(--line); display: grid; grid-template-columns: 36px 1fr; align-content: start; }
.reference-products-source::after { content: ""; position: absolute; left: 100%; top: 50%; width: 121px; height: 1px; background: var(--accent); }
.reference-products-source > span,
.reference-products-map li > span { grid-row: 1 / span 4; color: var(--accent); font: 700 10px/1 var(--display); }
.reference-products-source small,
.reference-products-map li small { color: var(--faint); font: 650 9px/1 var(--display); letter-spacing: .13em; }
.reference-products-source b,
.reference-products-map li b { margin-top: 20px; font: 720 clamp(22px, 2.5vw, 34px)/1.2 var(--heading); }
.reference-products-source p,
.reference-products-map li p { margin: 12px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; }
.reference-products-map ol { position: relative; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); list-style: none; }
.reference-products-map ol::before { content: ""; position: absolute; right: 0; left: -120px; top: 50%; height: 1px; background: var(--accent); }
.reference-products-map li { z-index: 1; min-width: 0; background: #f6f6f2; }
.reference-products-map li + li { border-left: 0; }

.reference-propulsion { background: #ecece7; }
.reference-propulsion-head { margin-bottom: 68px; }
.reference-propulsion-evidence { position: relative; width: min(100%, var(--max)); min-height: 560px; margin: 0 auto 76px; overflow: hidden; color: #fff; background: #111617; }
.reference-propulsion-evidence video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.reference-propulsion-evidence::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 38%, rgba(6, 10, 11, .78)); }
.reference-propulsion-evidence > div { position: absolute; z-index: 2; right: 48px; top: 50%; width: min(39%, 430px); transform: translateY(-50%); }
.reference-propulsion-evidence small { color: var(--accent); font: 650 9px/1 var(--display); letter-spacing: .14em; }
.reference-propulsion-evidence h3 { margin: 26px 0 16px; font: 730 clamp(40px, 5vw, 68px)/1 var(--heading); }
.reference-propulsion-evidence p { margin: 0; color: rgba(255, 255, 255, .65); line-height: 1.75; }
.reference-propulsion-grid { width: min(100%, var(--max)); margin: 0 auto; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; list-style: none; }
.reference-propulsion-grid li { min-width: 0; background: #f7f7f3; }
.reference-propulsion-grid figure { position: relative; margin: 0; aspect-ratio: 16 / 10; overflow: hidden; background: #dcddd8; }
.reference-propulsion-grid figure img { width: 100%; height: 100%; object-fit: cover; }
.reference-propulsion-grid li:first-child figure img { padding: 5%; object-fit: contain; background: #fff; }
.reference-propulsion-grid figcaption,
.reference-aircraft-media > span,
.reference-aircraft-stills figcaption { position: absolute; right: 10px; bottom: 9px; padding: 5px 7px; color: rgba(255, 255, 255, .78); background: rgba(6, 10, 11, .66); font-size: 9px; }
.reference-propulsion-grid li > div { padding: 23px 24px 26px; }
.reference-propulsion-grid li > div > span { color: var(--accent); font: 700 10px/1 var(--display); }
.reference-propulsion-grid li > div > small { float: right; color: var(--faint); font: 650 9px/1 var(--display); letter-spacing: .12em; }
.reference-propulsion-grid h3 { margin: 28px 0 12px; font: 730 42px/1 var(--heading); }
.reference-propulsion-grid li > div > b { min-height: 42px; display: block; font-size: 13px; line-height: 1.5; }
.reference-propulsion-grid li > div > p { min-height: 94px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.reference-propulsion-grid dl { margin: 24px 0 0; border-top: 1px solid var(--line); }
.reference-propulsion-grid dl > div { padding: 12px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 74px 1fr; gap: 10px; }
.reference-propulsion-grid dt { color: var(--faint); font-size: 10px; }
.reference-propulsion-grid dd { margin: 0; font-size: 11px; font-weight: 700; }

.reference-aircraft-route { padding-right: 0; padding-left: 0; background: #f7f7f3; }
.reference-aircraft-route > .reference-section-label,
.reference-aircraft-head,
.reference-aircraft-chapters { width: min(calc(100% - 48px), var(--max)); }
.reference-aircraft-head { margin-bottom: 86px; }
.reference-aircraft-chapters { margin: 0 auto; }
.reference-aircraft-chapter { padding: 0 0 126px; scroll-margin-top: var(--header-height); }
.reference-aircraft-chapter + .reference-aircraft-chapter { padding-top: 126px; border-top: 1px solid var(--line); }
.reference-aircraft-chapter > header { margin-bottom: 54px; display: grid; grid-template-columns: 60px minmax(250px, .8fr) minmax(280px, 1.2fr); gap: 28px; align-items: end; }
.reference-aircraft-chapter > header > span { color: var(--accent); font: 700 11px/1 var(--display); }
.reference-aircraft-chapter header small { color: var(--faint); font: 650 9px/1 var(--display); letter-spacing: .14em; }
.reference-aircraft-chapter header h3 { margin: 16px 0 0; font: 750 clamp(54px, 7vw, 96px)/.9 var(--heading); letter-spacing: -.055em; }
.reference-aircraft-chapter > header > p { margin: 0; color: var(--muted); line-height: 1.8; }
.reference-aircraft-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #111617; }
.reference-aircraft-media video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.reference-aircraft-summary { padding: 32px 0 52px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(440px, .95fr); gap: 72px; align-items: start; }
.reference-aircraft-summary h4 { margin: 0; font: 720 clamp(32px, 4.2vw, 58px)/1.12 var(--heading); }
.reference-aircraft-summary dl { margin: 0; border-top: 1px solid var(--line); }
.reference-aircraft-summary dl > div { min-height: 62px; padding: 13px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 92px 1fr; gap: 18px; align-items: center; }
.reference-aircraft-summary dt { color: var(--faint); font-size: 10px; }
.reference-aircraft-summary dd { margin: 0; font-size: 12px; font-weight: 700; }
.reference-aircraft-stills { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.reference-aircraft-stills figure { position: relative; min-width: 0; margin: 0; aspect-ratio: 16 / 10; overflow: hidden; background: #d9dad5; }
.reference-aircraft-stills img { width: 100%; height: 100%; object-fit: cover; }

.reference-service { background: #ecece7; }
.reference-service-head { margin-bottom: 60px; }
.reference-service > ol { width: min(100%, var(--max)); margin: 0 auto; padding: 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); list-style: none; }
.reference-service li { min-height: 180px; padding: 22px 20px; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.reference-service li:first-child { border-left: 1px solid var(--line); }
.reference-service li span { color: var(--accent); font: 700 10px/1 var(--display); }
.reference-service li b { margin-top: auto; font-size: 17px; }
.reference-service li p { margin: 12px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; }

@media (max-width: 1024px) {
  .reference-section { padding: 104px 32px; }
  .reference-section-label { margin-bottom: 58px; }
  .reference-hero-copy { grid-template-columns: 1fr; gap: 34px; bottom: 8vh; }
  .reference-hero-copy > p { margin-bottom: -12px; }
  .reference-hero-copy h1 { max-width: 760px; }
  .reference-hero-copy > div { max-width: 560px; }
  .reference-mission-body,
  .reference-product-intro,
  .reference-roadmap-head,
  .reference-history-head,
  .reference-news-head,
  .reference-products-architecture-head,
  .reference-propulsion-head,
  .reference-aircraft-head,
  .reference-service-head { grid-template-columns: 1fr; gap: 30px; }
  .reference-product-stage { min-height: 680px; }
  .reference-roadmap-grid { grid-template-columns: 1fr; gap: 28px; }
  .reference-roadmap-grid a { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr); }
  .reference-roadmap-grid figure { aspect-ratio: 16 / 10; }
  .reference-roadmap-grid a > div { min-height: 0; }
  .reference-history { padding-right: 32px; padding-bottom: 104px; padding-left: 32px; }
  .reference-history > .reference-section-label,
  .reference-history-head { width: 100%; }
  .reference-timeline-track { height: auto; border-top: 0; }
  .reference-timeline-pin { position: static; height: auto; min-height: 0; padding: 0; display: block; overflow: visible; background: transparent; }
  .reference-timeline-years,
  .reference-timeline-milestones,
  .reference-timeline-progress { display: none; }
  .reference-timeline-stage { height: auto; display: grid; gap: 42px; }
  .reference-timeline-stage article { position: relative; inset: auto; opacity: 1; pointer-events: auto; display: grid; grid-template-rows: auto auto; }
  .reference-timeline-stage figure { aspect-ratio: 16 / 9; }
  .reference-timeline-stage article > div { padding-top: 22px; }
  .reference-news-head a { justify-self: start; }
  .reference-products-map { grid-template-columns: 1fr; gap: 72px; }
  .reference-products-source::after { left: 50%; top: 100%; width: 1px; height: 73px; }
  .reference-products-map ol::before { top: -72px; right: 16.66%; left: 16.66%; }
  .reference-propulsion-grid { grid-template-columns: 1fr; gap: 34px; }
  .reference-propulsion-grid li { display: grid; grid-template-columns: minmax(280px, .85fr) minmax(0, 1.15fr); }
  .reference-propulsion-grid figure { aspect-ratio: auto; min-height: 330px; }
  .reference-propulsion-grid li > div > p { min-height: 0; }
  .reference-aircraft-route { padding-right: 32px; padding-left: 32px; }
  .reference-aircraft-route > .reference-section-label,
  .reference-aircraft-head,
  .reference-aircraft-chapters { width: 100%; }
  .reference-aircraft-summary { grid-template-columns: 1fr; gap: 34px; }
  .reference-service > ol { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .reference-service li:nth-child(n + 4) { border-top: 1px solid var(--line); }
}

@media (max-width: 767px) {
  body[data-theme="airframe"] { --reference-pad: 18px; }
  .reference-section { padding: 84px 18px; }
  .reference-section-label { margin-bottom: 44px; grid-template-columns: 54px 1fr; }
  .reference-hero,
  .reference-products-hero { min-height: 720px; }
  .reference-hero-media img { object-position: 55% center; }
  .reference-hero-rail { top: calc(var(--header-height) + 18px); right: 18px; left: 18px; }
  .reference-hero-rail span:last-child { display: none; }
  .reference-hero-copy { right: 18px; bottom: 78px; left: 18px; }
  .reference-hero-copy > p { margin-bottom: -8px; font-size: 8px; }
  .reference-hero-copy h1 { font-size: 72px; }
  .reference-hero-copy > div { padding-top: 16px; }
  .reference-hero-copy > div p { font-size: 14px; }
  .reference-scroll-cue { display: none; }
  .reference-media-credit { right: 18px; bottom: 16px; }
  .reference-mission-body h2,
  .reference-product-intro h2,
  .reference-roadmap-head h2,
  .reference-history-head h2,
  .reference-products-architecture-head h2,
  .reference-propulsion-head h2,
  .reference-aircraft-head h2 { font-size: 42px; }
  .reference-product-intro { margin-bottom: 44px; }
  .reference-product-stage { min-height: 0; overflow: visible; background: #151918; }
  .reference-product-word { top: 24px; font-size: 112px; }
  .reference-product-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
  .reference-product-media figure { height: 100%; }
  .reference-product-copy { position: relative; left: auto; bottom: auto; width: 100%; min-height: 340px; padding: 24px 22px; background: #151918; backdrop-filter: none; }
  .reference-product-copy h3 { font-size: 30px; }
  .reference-product-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reference-product-controls button { min-height: 88px; padding: 14px; }
  .reference-product-controls button:nth-child(2) { border-right: 0; }
  .reference-product-controls button:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .reference-roadmap-grid a { display: flex; }
  .reference-roadmap-grid figure { aspect-ratio: 4 / 3; }
  .reference-roadmap-grid a > div { min-height: 230px; }
  .reference-history { padding-right: 18px; padding-bottom: 84px; padding-left: 18px; }
  .reference-history-head { margin-bottom: 48px; }
  .reference-timeline-stage { gap: 52px; }
  .reference-timeline-stage article > div { grid-template-columns: 52px 1fr auto; gap: 6px 12px; }
  .reference-timeline-stage h3 { font-size: 30px; }
  .reference-newsroom li > a { padding: 24px 0; grid-template-columns: 1fr 22px; gap: 18px; }
  .reference-newsroom figure { grid-column: 1 / -1; height: auto; aspect-ratio: 16 / 10; }
  .reference-products-hero > img { object-position: 58% center; }
  .reference-products-hero-copy { top: 150px; right: 18px; left: 18px; }
  .reference-products-hero-copy h1 { font-size: 48px; }
  .reference-products-hero-copy > p:last-child { font-size: 14px; }
  .reference-products-anchor { right: 18px; left: 18px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reference-products-anchor a { min-height: 70px; padding: 12px; }
  .reference-products-anchor a:nth-child(2) { border-right: 0; }
  .reference-products-anchor a:nth-child(n + 3) { border-top: 1px solid rgba(255, 255, 255, .2); }
  .reference-products-map ol { grid-template-columns: 1fr; }
  .reference-products-map ol::before { top: -72px; right: 50%; left: auto; width: 1px; height: calc(100% + 72px); }
  .reference-products-map li + li { border-top: 0; border-left: 1px solid var(--line); }
  .reference-propulsion-evidence { min-height: 500px; }
  .reference-propulsion-evidence::after { background: linear-gradient(0deg, rgba(6, 10, 11, .9), transparent 72%); }
  .reference-propulsion-evidence > div { right: 22px; top: auto; bottom: 26px; left: 22px; width: auto; transform: none; }
  .reference-propulsion-grid li { display: block; }
  .reference-propulsion-grid figure { min-height: 0; aspect-ratio: 16 / 10; }
  .reference-aircraft-route { padding-right: 18px; padding-left: 18px; }
  .reference-aircraft-head { margin-bottom: 60px; }
  .reference-aircraft-chapter { padding-bottom: 84px; }
  .reference-aircraft-chapter + .reference-aircraft-chapter { padding-top: 84px; }
  .reference-aircraft-chapter > header { grid-template-columns: 40px 1fr; gap: 18px; }
  .reference-aircraft-chapter > header > p { grid-column: 2; }
  .reference-aircraft-chapter header h3 { font-size: 56px; }
  .reference-aircraft-media { aspect-ratio: 4 / 3; }
  .reference-aircraft-summary { padding: 26px 0 38px; }
  .reference-aircraft-summary h4 { font-size: 34px; }
  .reference-aircraft-stills { grid-template-columns: 1fr; }
  .reference-service > ol { grid-template-columns: 1fr; }
  .reference-service li,
  .reference-service li:first-child { min-height: 130px; border: 1px solid var(--line); border-bottom: 0; }
  .reference-service li:last-child { border-bottom: 1px solid var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  .reference-scroll-cue i::after { animation: none; }
  .reference-product-media figure,
  .reference-product-copy article { transition: none; animation: none; }
  .reference-timeline-track { height: auto; }
  .reference-timeline-pin { position: static; height: auto; min-height: 0; padding: 48px var(--reference-pad); display: block; }
  .reference-timeline-years,
  .reference-timeline-milestones,
  .reference-timeline-progress { display: none; }
  .reference-timeline-stage { height: auto; display: grid; gap: 42px; }
  .reference-timeline-stage article { position: relative; opacity: 1; pointer-events: auto; }
  .reference-timeline-stage figure { min-height: 0; aspect-ratio: 16 / 9; }
}

/* 银翼航迹的统一色彩与运动系统。 */
body[data-theme="airframe"] {
  background: var(--page);
  scroll-behavior: smooth;
}

body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed),
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) {
  color: #000;
  border-color: rgba(0, 0, 0, .18);
  background: linear-gradient(180deg, rgba(248, 248, 248, .74), rgba(248, 248, 248, .18) 68%, transparent);
}

body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .desktop-nav a,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .desktop-nav a,
body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .prototype-badge,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .prototype-badge {
  color: rgba(0, 0, 0, .68);
  border-color: rgba(0, 0, 0, .26);
}

body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .desktop-nav a:hover,
body[data-theme="airframe"][data-page="home"] .site-header:not(.is-condensed) .desktop-nav a.active,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .desktop-nav a:hover,
body[data-theme="airframe"][data-page="products"] .site-header:not(.is-condensed) .desktop-nav a.active { color: #000; }

.reference-hero,
.reference-products-hero {
  --reference-velocity-x: 0px;
  --reference-velocity-x-neg: 0px;
  --reference-velocity-y: 0px;
  --reference-velocity-y-neg: 0px;
  --reference-velocity-alpha: 0;
  --reference-velocity-blur: 0px;
  --reference-copy-x: 0px;
  --reference-copy-y: 0px;
  --reference-copy-blur: 0px;
  min-height: max(760px, 100svh);
  color: #000;
  background: #d9d9d9;
}

.reference-hero-media,
.reference-products-hero-media { position: absolute; inset: 0; overflow: hidden; }

.reference-hero-media img,
.reference-products-hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.reference-hero-media .reference-scene-image,
.reference-products-hero-media .reference-scene-image {
  transform: translate3d(var(--reference-pointer-x, 0), var(--reference-pointer-y, 0), 0) scale(1.015);
  transition: transform 1.05s cubic-bezier(.16, 1, .3, 1);
}

.reference-hero-media > div,
.reference-products-hero-shade {
  position: absolute;
  z-index: 2;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(248, 248, 248, .82), rgba(248, 248, 248, .15) 46%, transparent 70%),
    linear-gradient(0deg, rgba(248, 248, 248, .9), rgba(248, 248, 248, .08) 42%, transparent 66%);
}

.reference-speed-echo {
  z-index: 1;
  pointer-events: none;
  opacity: var(--reference-velocity-alpha);
  will-change: transform, opacity, filter;
  filter: blur(var(--reference-velocity-blur));
  -webkit-mask-image: repeating-linear-gradient(0deg, #000 0 14px, transparent 14px 30px);
  mask-image: repeating-linear-gradient(0deg, #000 0 14px, transparent 14px 30px);
  transition: opacity 100ms linear;
}

.reference-speed-echo-a {
  transform: translate3d(var(--reference-velocity-x), var(--reference-velocity-y), 0) scale(1.018);
  mix-blend-mode: multiply;
}

.reference-speed-echo-b {
  transform: translate3d(var(--reference-velocity-x-neg), var(--reference-velocity-y-neg), 0) scale(1.022);
  mix-blend-mode: screen;
  -webkit-mask-image: repeating-linear-gradient(0deg, transparent 0 12px, #000 12px 24px, transparent 24px 42px);
  mask-image: repeating-linear-gradient(0deg, transparent 0 12px, #000 12px 24px, transparent 24px 42px);
}

.reference-hero-rail {
  border-color: rgba(0, 0, 0, .32);
  color: rgba(0, 0, 0, .56);
}

.reference-hero-rail::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 84px;
  height: 3px;
  background: var(--accent);
}

.reference-hero-copy {
  max-width: min(1160px, calc(100% - var(--reference-pad) * 2));
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  gap: 70px;
  color: #000;
}

.reference-hero-copy > *,
.reference-products-hero-copy > * {
  transform: translate3d(var(--reference-copy-x), var(--reference-copy-y), 0);
  filter: blur(var(--reference-copy-blur));
  will-change: transform, filter;
}

.reference-hero-copy > p { color: rgba(0, 0, 0, .58); }
.reference-hero-copy h1 {
  max-width: 650px;
  font-size: clamp(58px, 6.3vw, 96px);
  line-height: .92;
  text-shadow: none;
}
.reference-hero-copy > div { border-color: rgba(0, 0, 0, .34); }
.reference-hero-copy > div p { color: rgba(0, 0, 0, .68); }
.reference-hero-copy a { color: #000; }
.reference-media-credit { color: rgba(0, 0, 0, .56); }
.reference-scroll-cue { color: rgba(0, 0, 0, .56); }
.reference-scroll-cue i { background: rgba(0, 0, 0, .2); }
.reference-scroll-cue i::after { background: var(--accent); }

.reference-section-label { position: relative; }
.reference-section-label::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 74px;
  height: 2px;
  background: var(--accent);
}

.reference-mission { background: #f8f8f8; }
.reference-product { background: #e7e7e7; }
.reference-roadmap { background: #f8f8f8; }
.reference-history { background: #ececec; }
.reference-newsroom { background: #f8f8f8; }
.reference-products-architecture { background: #f8f8f8; }
.reference-propulsion { background: #e7e7e7; }
.reference-aircraft-route { background: #f8f8f8; }
.reference-service { background: #ececec; }
.reference-products-page #power { scroll-margin-top: calc(var(--header-height) + 24px); }

.reference-product-stage {
  --reference-pointer-x: 0px;
  --reference-pointer-y: 0px;
  background: #0d0d0d;
  box-shadow: 0 28px 80px rgba(0, 0, 0, .14);
}

.reference-product-stage::before {
  content: "";
  position: absolute;
  z-index: 3;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0 25%, rgba(255, 255, 255, .2) 25% 100%);
  pointer-events: none;
}

.reference-product-media figure {
  clip-path: inset(0 0 0 100%);
  transform: translate3d(5%, 0, 0) scale(1.055);
  transition: none;
}

.reference-product-media figure img {
  transform: translate3d(var(--reference-pointer-x), var(--reference-pointer-y), 0) scale(1.02);
  transition: transform 1.05s cubic-bezier(.16, 1, .3, 1);
}

.reference-product[data-reference-direction="backward"] .reference-product-media figure {
  clip-path: inset(0 100% 0 0);
  transform: translate3d(-5%, 0, 0) scale(1.055);
}

.reference-product-media figure.active {
  z-index: 2;
  opacity: 1;
  clip-path: inset(0);
  transform: translate3d(0, 0, 0) scale(1);
  animation: reference-media-forward .92s cubic-bezier(.16, 1, .3, 1) both;
}

.reference-product[data-reference-direction="backward"] .reference-product-media figure.active {
  animation-name: reference-media-backward;
}

.reference-product-media figure.is-leaving {
  z-index: 1;
  opacity: 1;
  animation: reference-media-leave-forward .92s cubic-bezier(.16, 1, .3, 1) both;
}

.reference-product[data-reference-direction="backward"] .reference-product-media figure.is-leaving {
  animation-name: reference-media-leave-backward;
}

@keyframes reference-media-forward {
  from { clip-path: inset(0 0 0 100%); transform: translate3d(5%, 0, 0) scale(1.055); }
  to { clip-path: inset(0); transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes reference-media-backward {
  from { clip-path: inset(0 100% 0 0); transform: translate3d(-5%, 0, 0) scale(1.055); }
  to { clip-path: inset(0); transform: translate3d(0, 0, 0) scale(1); }
}

@keyframes reference-media-leave-forward {
  from { clip-path: inset(0); transform: translate3d(0, 0, 0) scale(1); }
  to { clip-path: inset(0 100% 0 0); transform: translate3d(-3%, 0, 0) scale(1.018); }
}

@keyframes reference-media-leave-backward {
  from { clip-path: inset(0); transform: translate3d(0, 0, 0) scale(1); }
  to { clip-path: inset(0 0 0 100%); transform: translate3d(3%, 0, 0) scale(1.018); }
}

.reference-product-word {
  color: rgba(255, 255, 255, .09);
  transition: filter .8s cubic-bezier(.16, 1, .3, 1), transform .8s cubic-bezier(.16, 1, .3, 1), opacity .8s ease;
}

.reference-product-word.is-changing {
  animation: reference-word-settle .82s cubic-bezier(.16, 1, .3, 1) both;
}

@keyframes reference-word-settle {
  0% { opacity: .12; filter: blur(16px); transform: translateX(36px); }
  100% { opacity: 1; filter: blur(0); transform: translateX(0); }
}

.reference-product-copy { overflow: hidden; }
.reference-product-copy article {
  position: absolute;
  inset: 28px 30px;
  display: block;
  opacity: 0;
  pointer-events: none;
  transform: translateY(22px);
}
.reference-product-copy article.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  animation: reference-copy-in-advanced .78s .12s cubic-bezier(.16, 1, .3, 1) both;
}
.reference-product-copy article.is-leaving {
  animation: reference-copy-out-advanced .42s ease both;
}
@keyframes reference-copy-in-advanced {
  from { opacity: 0; transform: translateY(24px); filter: blur(8px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}
@keyframes reference-copy-out-advanced {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-12px); }
}

.reference-product-controls button { transition: color .34s ease, background .34s ease, transform .34s cubic-bezier(.16, 1, .3, 1); }
.reference-product-controls button:hover { transform: translateY(-4px); }
.reference-product-controls button.active { background: #000; }
.reference-product-controls button.active span,
.reference-product-controls button.active small { color: var(--accent); }

.reference-roadmap-grid a,
.reference-propulsion-grid li { background: #ececec; }
.reference-roadmap-grid a { transition: background .36s ease, transform .65s cubic-bezier(.16, 1, .3, 1); }
.reference-roadmap-grid a:hover { background: #d9d9d9; transform: translateY(-8px); }

.reference-timeline-pin { background: #f8f8f8; }
.reference-timeline-stage article { transition: none; }
.reference-timeline-stage article.active {
  z-index: 2;
  animation: reference-timeline-in-forward .86s cubic-bezier(.16, 1, .3, 1) both;
}
.reference-timeline[data-reference-direction="backward"] .reference-timeline-stage article.active {
  animation-name: reference-timeline-in-backward;
}
.reference-timeline-stage article.is-leaving {
  z-index: 1;
  pointer-events: none;
  animation: reference-timeline-out-forward .72s cubic-bezier(.16, 1, .3, 1) both;
}
.reference-timeline[data-reference-direction="backward"] .reference-timeline-stage article.is-leaving {
  animation-name: reference-timeline-out-backward;
}
@keyframes reference-timeline-in-forward {
  from { opacity: 0; clip-path: inset(0 0 100% 0); transform: translateY(34px); filter: blur(9px); }
  to { opacity: 1; clip-path: inset(0); transform: translateY(0); filter: blur(0); }
}
@keyframes reference-timeline-in-backward {
  from { opacity: 0; clip-path: inset(100% 0 0 0); transform: translateY(-34px); filter: blur(9px); }
  to { opacity: 1; clip-path: inset(0); transform: translateY(0); filter: blur(0); }
}
@keyframes reference-timeline-out-forward {
  from { opacity: 1; clip-path: inset(0); transform: translateY(0); }
  to { opacity: 0; clip-path: inset(100% 0 0 0); transform: translateY(-24px); }
}
@keyframes reference-timeline-out-backward {
  from { opacity: 1; clip-path: inset(0); transform: translateY(0); }
  to { opacity: 0; clip-path: inset(0 0 100% 0); transform: translateY(24px); }
}

.reference-timeline-progress i { background: var(--accent); transition: height .68s cubic-bezier(.16, 1, .3, 1); }
.reference-timeline-years li,
.reference-timeline-milestones li { transition: opacity .5s ease, transform .65s cubic-bezier(.16, 1, .3, 1); }

.reference-products-hero-media .reference-scene-image { object-position: center 56%; }
.reference-products-hero-copy {
  top: 22vh;
  color: #000;
}
.reference-products-hero-copy > p:first-child { color: rgba(0, 0, 0, .56); }
.reference-products-hero-copy h1 {
  max-width: 860px;
  font-size: clamp(58px, 7vw, 106px);
  line-height: .94;
}
.reference-products-hero-copy > p:last-child { color: rgba(0, 0, 0, .7); }
.reference-products-anchor {
  position: relative;
  right: auto;
  bottom: auto;
  left: auto;
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  border-color: rgba(0, 0, 0, .28);
  background: rgba(248, 248, 248, .82);
  backdrop-filter: blur(16px);
}
.reference-products-anchor a { color: #000; border-color: rgba(0, 0, 0, .18); transition: background .3s ease, transform .3s ease; }
.reference-products-anchor a:hover { background: var(--accent); transform: translateY(-4px); }
.reference-products-anchor small { color: rgba(0, 0, 0, .56); }
.reference-products-anchor a.active { color: #fff; background: #000; }
.reference-products-anchor a.active small { color: rgba(255, 255, 255, .58); }

@media (min-width: 1025px) {
  .reference-products-anchor {
    position: sticky;
    top: var(--sticky-header-height, 64px);
    z-index: 42;
    width: min(100%, var(--max));
    transition: top .42s cubic-bezier(.16, 1, .3, 1), box-shadow .3s ease;
    box-shadow: 0 12px 34px rgba(0, 0, 0, .1);
  }
  .reference-products-anchor a { transition: min-height .42s cubic-bezier(.16, 1, .3, 1), padding .42s cubic-bezier(.16, 1, .3, 1), background .3s ease, transform .3s ease; }
  body.has-condensed-header .reference-products-anchor a { min-height: 68px; padding-top: 12px; padding-bottom: 12px; }
  .reference-products-page #power,
  .reference-aircraft-chapter { scroll-margin-top: calc(var(--sticky-header-height, 64px) + 92px); }
}

.reference-products-source,
.reference-products-map li { background: #ececec; }
.reference-products-source::after,
.reference-products-map ol::before {
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .9s cubic-bezier(.16, 1, .3, 1);
}
.reference-products-map.revealed .reference-products-source::after { transform: scaleX(1); transition-delay: .18s; }
.reference-products-map.revealed ol::before { transform: scaleX(1); transition-delay: .55s; }
.reference-products-map li { transition: background .3s ease, transform .55s cubic-bezier(.16, 1, .3, 1); }
.reference-products-map li:hover { background: #d9d9d9; transform: translateY(-6px); }

.reference-propulsion-evidence,
.reference-aircraft-media,
.reference-aircraft-stills figure { clip-path: inset(0); }
.reference-propulsion-evidence.reveal:not(.revealed),
.reference-aircraft-chapter.reveal:not(.revealed) .reference-aircraft-media,
.reference-aircraft-chapter.reveal:not(.revealed) .reference-aircraft-stills figure { clip-path: inset(0 0 100% 0); }
.reference-propulsion-evidence.revealed,
.reference-aircraft-chapter.revealed .reference-aircraft-media,
.reference-aircraft-chapter.revealed .reference-aircraft-stills figure {
  transition: clip-path 1.05s cubic-bezier(.16, 1, .3, 1);
  clip-path: inset(0);
}
.reference-aircraft-chapter.revealed .reference-aircraft-stills figure:nth-child(2) { transition-delay: .1s; }
.reference-aircraft-chapter.revealed .reference-aircraft-stills figure:nth-child(3) { transition-delay: .2s; }

.reference-motion-enabled .reference-hero-media,
.reference-motion-enabled .reference-products-hero-media { clip-path: inset(0 0 100% 0); }
.reference-motion-enabled.reference-ready .reference-hero-media,
.reference-motion-enabled.reference-ready .reference-products-hero-media {
  clip-path: inset(0);
  transition: clip-path 1.25s cubic-bezier(.16, 1, .3, 1);
}
.reference-motion-enabled .reference-hero-rail,
.reference-motion-enabled .reference-hero-copy,
.reference-motion-enabled .reference-products-hero-copy,
.reference-motion-enabled .reference-products-anchor,
.reference-motion-enabled .reference-media-credit {
  opacity: 0;
  transform: translateY(28px);
}
.reference-motion-enabled.reference-ready .reference-hero-rail,
.reference-motion-enabled.reference-ready .reference-hero-copy,
.reference-motion-enabled.reference-ready .reference-products-hero-copy,
.reference-motion-enabled.reference-ready .reference-products-anchor,
.reference-motion-enabled.reference-ready .reference-media-credit {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .82s ease, transform 1s cubic-bezier(.16, 1, .3, 1);
}
.reference-motion-enabled.reference-ready .reference-hero-copy,
.reference-motion-enabled.reference-ready .reference-products-hero-copy { transition-delay: .25s; }
.reference-motion-enabled.reference-ready .reference-products-anchor { transition-delay: .46s; }
.reference-motion-enabled.reference-ready .reference-media-credit { transition-delay: .58s; }

.reference-motion-enabled .reveal:not(.revealed) .headline-line {
  opacity: 0;
  clip-path: inset(0 0 100% 0);
  transform: translateY(34px);
}
.reference-motion-enabled .reveal.revealed .headline-line {
  opacity: 1;
  clip-path: inset(0);
  transform: translateY(0);
  transition: opacity .5s ease, clip-path .92s cubic-bezier(.16, 1, .3, 1), transform .92s cubic-bezier(.16, 1, .3, 1);
}
.reference-motion-enabled .reveal.revealed .headline-line:nth-child(2) { transition-delay: .11s; }

@media (min-width: 1025px) {
  .reference-hero-media .reference-scene-image { object-position: center 48%; }
  .reference-products-hero-media .reference-scene-image { object-position: center 52%; }
}

@media (min-width: 768px) and (max-width: 1024px) {
  .reference-hero,
  .reference-products-hero { min-height: 820px; }
  .reference-hero-copy { grid-template-columns: 1fr; gap: 28px; }
  .reference-hero-copy h1 { max-width: 580px; font-size: 78px; }
  .reference-hero-copy > div { max-width: 500px; }
  .reference-speed-echo { display: none; }
  .reference-product-controls button:hover,
  .reference-roadmap-grid a:hover,
  .reference-products-anchor a:hover,
  .reference-products-map li:hover { transform: none; }
}

@media (max-width: 767px) {
  body[data-theme="airframe"] { scroll-behavior: auto; }
  .reference-hero,
  .reference-products-hero { min-height: 720px; }
  .reference-hero-media .reference-scene-image { object-position: 58% center; }
  .reference-products-hero-media .reference-scene-image { object-position: 53% center; }
  .reference-speed-echo { display: none; }
  .reference-hero-media > div,
  .reference-products-hero-shade {
    background: linear-gradient(0deg, rgba(248, 248, 248, .94), rgba(248, 248, 248, .06) 58%, rgba(248, 248, 248, .24));
  }
  .reference-hero-copy h1 { font-size: 62px; }
  .reference-product-stage { background: #0d0d0d; }
  .reference-product-copy article { inset: 24px 22px; }
  .reference-product-controls button:hover,
  .reference-roadmap-grid a:hover,
  .reference-products-anchor a:hover,
  .reference-products-map li:hover { transform: none; }
  .reference-products-hero-copy { top: 144px; }
  .reference-products-hero-copy h1 { font-size: 46px; }
  .reference-products-anchor { background: rgba(248, 248, 248, .9); }
  .reference-products-anchor a { color: #000; border-color: rgba(0, 0, 0, .16); }
  .reference-products-anchor a:nth-child(n + 3) { border-top-color: rgba(0, 0, 0, .16); }
  .reference-timeline-stage article.active,
  .reference-timeline-stage article.is-leaving { animation: none; }
}

@media (prefers-reduced-motion: reduce) {
  body[data-theme="airframe"] { scroll-behavior: auto; }
  .reference-speed-echo { display: none; }
  .reference-motion-enabled .reference-hero-media,
  .reference-motion-enabled .reference-products-hero-media,
  .reference-motion-enabled .reference-hero-rail,
  .reference-motion-enabled .reference-hero-copy,
  .reference-motion-enabled .reference-products-hero-copy,
  .reference-motion-enabled .reference-products-anchor,
  .reference-motion-enabled .reference-media-credit,
  .reference-motion-enabled .reveal:not(.revealed) .headline-line {
    opacity: 1;
    clip-path: inset(0);
    transform: none;
    filter: none;
    transition: none;
  }
  .reference-product-media figure.active,
  .reference-product-media figure.is-leaving,
  .reference-product-copy article.active,
  .reference-product-copy article.is-leaving,
  .reference-product-word.is-changing,
  .reference-timeline-stage article.active,
  .reference-timeline-stage article.is-leaving { animation: none; }
}