:root {
  color-scheme: dark;
  --bg: #090a0c;
  --panel: #121417;
  --panel-2: #181b1f;
  --ink: #f4f1eb;
  --muted: #a6a7aa;
  --line: #292c30;
  --accent: #f0a03a;
  --accent-dark: #8f4e16;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img, video { display: block; width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header {
  position: sticky; top: 0; z-index: 20; height: 72px; padding: 0 clamp(22px, 5vw, 76px);
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(18px);
}
.brand { font-size: .83rem; font-weight: 750; letter-spacing: .14em; }
.brand span { color: var(--accent); }
nav { display: flex; gap: clamp(16px, 3vw, 36px); color: var(--muted); font-size: .88rem; }
nav a:hover { color: var(--ink); }

main { width: min(1180px, calc(100% - 44px)); margin: 0 auto; }
.hero { min-height: auto; padding: clamp(76px, 9vw, 128px) 0 80px; }
.hero-copy { max-width: 920px; }
.eyebrow, .section-heading p { color: var(--accent); font-size: .78rem; letter-spacing: .2em; }
h1 { margin: 24px 0 28px; max-width: 780px; font-size: clamp(3.2rem, 6.5vw, 6.7rem); line-height: .98; letter-spacing: -.06em; }
h1 span { color: var(--accent); }
.lead { max-width: 680px; color: #c5c3bf; font-size: clamp(1.02rem, 1.6vw, 1.24rem); line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { min-height: 46px; padding: 0 18px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--line); font-size: .86rem; transition: border-color .2s ease, background .2s ease, transform .2s ease; }
.button:hover { border-color: #62656b; transform: translateY(-2px); }
.button-primary { background: var(--accent); border-color: var(--accent); color: #17100a; font-weight: 700; }
.button-primary:hover { background: #ffb354; border-color: #ffb354; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 38px; }
.hero-meta span { padding: 9px 13px; border: 1px solid var(--line); border-radius: 999px; color: #d4d1cb; font-size: .86rem; }
.hero-visual { position: relative; margin: clamp(44px, 6vw, 72px) 0 0; aspect-ratio: 1846 / 1080; overflow: hidden; background: var(--panel); }
.hero-visual::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(180deg, transparent 48%, rgba(4,5,6,.9)); }
.hero-visual img { height: 100%; object-fit: cover; object-position: center; }
.hero-visual figcaption { position: absolute; z-index: 2; left: 22px; right: 22px; bottom: 20px; display: flex; justify-content: space-between; align-items: end; gap: 20px; }
.hero-visual figcaption span { color: var(--accent); font-size: .75rem; letter-spacing: .18em; }
.hero-visual figcaption strong { font-size: .76rem; letter-spacing: .1em; }

.featured { padding: 104px 0; border-top: 1px solid var(--line); }
.section-heading { margin-bottom: 38px; }
.section-heading h2 { margin: 12px 0 0; font-size: clamp(2.3rem, 5vw, 4.9rem); line-height: 1.08; letter-spacing: -.05em; }
.project-intro { margin: 0 0 46px auto; width: min(700px, 100%); display: grid; grid-template-columns: 190px 1fr; gap: 26px; }
.project-role { color: var(--accent); font-size: .82rem; letter-spacing: .08em; }
.project-summary { margin: 0; color: #d2cfca; font-size: 1.08rem; line-height: 1.85; }
.inline-detail-link { display: inline-block; margin-top: 18px; padding-bottom: 4px; border-bottom: 1px solid currentColor; color: var(--ink); font-size: .82rem; }
.inline-detail-link:hover { color: var(--accent); }
.project-gallery { display: grid; grid-template-columns: repeat(12, 1fr); grid-auto-rows: 260px; grid-auto-flow: dense; gap: 14px; }
.project-gallery figure { position: relative; margin: 0; overflow: hidden; background: var(--panel); }
.project-gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.project-gallery figure:hover img { transform: scale(1.025); }
.gallery-lead { grid-column: span 8; grid-row: span 2; }
.gallery-support { grid-column: span 4; }
.gallery-support:nth-child(n + 4) { grid-column: span 6; }
.project-gallery figcaption { position: absolute; left: 16px; bottom: 14px; padding: 8px 10px; background: rgba(9,10,12,.78); backdrop-filter: blur(8px); color: #dedbd5; font-size: .74rem; }
.featured-video { margin-top: 14px; padding: clamp(18px, 3vw, 28px); background: var(--panel); }
.featured-video-copy { margin-bottom: 18px; display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.featured-video-copy p { margin: 0 0 8px; color: var(--accent); font-size: .72rem; letter-spacing: .16em; }
.featured-video-copy h3 { margin: 0; font-size: clamp(1.4rem, 2.6vw, 2.2rem); letter-spacing: -.03em; }
.featured-video-copy > span { color: var(--muted); font-size: .75rem; letter-spacing: .12em; }
.featured-video video { aspect-ratio: 16 / 9; max-height: 660px; object-fit: contain; background: #050607; }
.project-data { margin-top: 14px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 14px; }
.data-block { padding: clamp(24px, 4vw, 42px); background: var(--panel); }
.data-block > span, .confidentiality > span { display: block; margin-bottom: 18px; color: var(--accent); font-size: .75rem; letter-spacing: .16em; }
.data-block p { margin: 0; color: #cac7c1; line-height: 1.9; }
.equipment-block ul { margin: 0; padding: 0; list-style: none; }
.equipment-block li { padding: 13px 0; display: grid; grid-template-columns: minmax(180px, .8fr) 1.2fr; gap: 20px; border-bottom: 1px solid var(--line); }
.equipment-block li:last-child { border-bottom: 0; }
.equipment-block strong { font-size: .91rem; }
.equipment-block small { color: var(--muted); font-size: .8rem; line-height: 1.55; }
.equipment-visuals { margin-top: 14px; display: grid; grid-template-columns: 1.35fr .65fr; gap: 14px; }
.equipment-visuals figure { position: relative; height: 370px; margin: 0; overflow: hidden; background: var(--panel); }
.equipment-visuals img { height: 100%; object-fit: cover; }
.equipment-visuals figure:last-child img { object-position: 52% center; }
.equipment-visuals figcaption { position: absolute; left: 16px; bottom: 14px; padding: 8px 10px; background: rgba(9,10,12,.78); color: #dedbd5; font-size: .74rem; }
.confidentiality { margin: 14px 0 0; padding: 24px 28px; border: 1px solid var(--line); color: #929499; font-size: .83rem; line-height: 1.75; }
.confidentiality > span { display: inline; margin: 0 14px 0 0; }

.work, .video-library, .capabilities, .about { padding: 112px 0; border-top: 1px solid var(--line); }
.split-heading { display: grid; grid-template-columns: 1.3fr .7fr; gap: 48px; align-items: end; }
.section-note { margin: 0 0 8px; color: var(--muted) !important; font-size: .92rem !important; letter-spacing: 0 !important; line-height: 1.8; }
.project-cards { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; }
.project-card { position: relative; background: var(--panel); border: 1px solid transparent; overflow: hidden; transition: transform .22s ease, border-color .22s ease; }
.project-card:hover { transform: translateY(-4px); border-color: #393d42; }
.span-7 { grid-column: span 7; }
.span-6 { grid-column: span 6; }
.span-5 { grid-column: span 5; }
.card-media { display: block; height: 270px; overflow: hidden; background: #0b0c0e; border-bottom: 0; }
.card-media img { height: 100%; object-fit: cover; transition: transform .5s ease; }
.visual-card:hover .card-media img { transform: scale(1.025); }
.span-5 .card-media { height: 250px; }
.card-body { min-height: 292px; padding: 28px; display: flex; flex-direction: column; }
.card-topline { display: flex; justify-content: space-between; gap: 20px; align-items: start; }
.card-topline > span { color: #5e6166; font-size: .72rem; letter-spacing: .18em; }
.card-type { margin: 0 0 18px; color: var(--accent); font-size: .76rem; letter-spacing: .13em; }
.project-card h3 { margin: 0; font-size: clamp(1.75rem, 3vw, 2.75rem); line-height: 1.18; letter-spacing: -.04em; }
.project-card .card-body > p:not(.card-type) { max-width: 540px; margin: 18px 0 0; color: var(--muted); font-size: .9rem; line-height: 1.75; }
.card-link { margin-top: auto; padding-top: 26px; width: fit-content; padding-bottom: 4px; border-bottom: 1px solid currentColor; font-size: .8rem; }
.project-card .card-link::after { content: ""; position: absolute; inset: 0; z-index: 3; }
.project-card:focus-within { border-color: #5d6167; }
.project-card .card-link:focus-visible::after { outline: 2px solid var(--accent); outline-offset: -3px; }
.media-split { display: grid; grid-template-columns: 1fr 1fr; }
.media-split img { min-width: 0; }
.media-pawprint { grid-template-columns: .75fr 1.25fr; }
.media-pawprint img:first-child { object-position: center top; }
.index-card { background: linear-gradient(145deg, #191c20, #0d0f12 72%); border-color: var(--line); }
.index-card::after { content: "VIDEO INDEX"; position: absolute; right: -12px; bottom: 36px; color: rgba(240,160,58,.08); font-size: clamp(3rem, 6vw, 6rem); font-weight: 800; letter-spacing: -.04em; transform: rotate(-90deg) translateX(42%); transform-origin: right bottom; pointer-events: none; }
.index-card .card-body { min-height: 562px; position: relative; z-index: 1; }
.index-card h3 { margin-top: auto; }
.dual-links { display: flex; gap: 18px; }

.video-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; }
.video-card { grid-column: span 6; overflow: hidden; background: var(--panel); border: 1px solid transparent; transition: transform .22s ease, border-color .22s ease; }
.video-card:hover { transform: translateY(-4px); border-color: #393d42; }
.video-frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #050607; }
.video-frame video { height: 100%; object-fit: cover; }
.video-frame.is-vertical video { object-fit: contain; }
.video-info { min-height: 128px; padding: 22px 24px 24px; display: flex; align-items: start; justify-content: space-between; gap: 24px; }
.video-info p { margin: 0 0 10px; color: var(--accent); font-size: .72rem; letter-spacing: .12em; }
.video-info h3 { margin: 0; font-size: clamp(1.18rem, 2vw, 1.65rem); line-height: 1.35; letter-spacing: -.025em; }
.video-info h3 a:hover { color: var(--accent); }
.video-info > span { flex: 0 0 auto; padding-top: 2px; color: #73767b; font-size: .72rem; letter-spacing: .1em; }

.capability-list { margin: 60px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.capability-list li { min-height: 128px; padding: 28px 0; display: grid; grid-template-columns: 90px minmax(0, 1fr); align-items: center; border-bottom: 1px solid var(--line); }
.capability-list > li > span { color: var(--accent); font-size: .74rem; letter-spacing: .12em; }
.capability-list div { display: grid; grid-template-columns: minmax(220px, .65fr) 1.35fr; align-items: center; gap: 36px; }
.capability-list h3 { margin: 0; font-size: clamp(1.45rem, 2.5vw, 2.2rem); }
.capability-list p { margin: 0; color: var(--muted); line-height: 1.75; }

.about { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(48px, 8vw, 110px); }
.about h2 { margin: 18px 0 0; font-size: clamp(2.2rem, 4.5vw, 4.2rem); line-height: 1.15; letter-spacing: -.05em; }
.timeline { border-top: 1px solid var(--line); }
.timeline article { padding: 28px 0; display: grid; grid-template-columns: 150px 1fr; gap: 32px; border-bottom: 1px solid var(--line); }
.timeline time { color: var(--accent); font-size: .78rem; }
.timeline h3 { margin: -5px 0 10px; font-size: 1.18rem; }
.timeline p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.75; }

.closing { min-height: 420px; padding: 100px 0; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; border-top: 1px solid var(--line); }
.closing > p { color: var(--accent); font-size: .76rem; letter-spacing: .16em; }
.closing h2 { margin: 16px 0 36px; font-size: clamp(2.3rem, 6vw, 5.8rem); line-height: 1.08; letter-spacing: -.055em; }
footer { width: min(1180px, calc(100% - 44px)); margin: 0 auto; padding: 26px 0 42px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--line); color: #777a7f; font-size: .73rem; letter-spacing: .08em; }

@media (prefers-reduced-motion: no-preference) {
  .hero-copy, .hero-visual { animation: enter .75s ease both; }
  .hero-visual { animation-delay: .12s; }
  @keyframes enter { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
}

@media (max-width: 760px) {
  .site-header { height: 64px; }
  nav { gap: 16px; }
  nav a:nth-child(2), nav a:nth-child(4), nav a:nth-child(5) { display: none; }
  main { width: min(100% - 28px, 1180px); }
  .hero { padding: 92px 0 76px; }
  h1 { font-size: clamp(3rem, 15vw, 5rem); }
  .hero-visual { margin-top: 42px; }
  .featured, .work, .video-library, .capabilities, .about { padding: 84px 0; }
  .project-intro, .split-heading, .project-data, .about { grid-template-columns: 1fr; }
  .project-gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: auto; }
  .gallery-lead { grid-column: span 2; grid-row: auto; height: 360px; }
  .gallery-support, .gallery-support:nth-child(n + 4) { grid-column: span 1; height: 240px; }
  .equipment-visuals { grid-template-columns: 1fr 1fr; }
  .equipment-visuals figure { height: 300px; }
  .project-cards { grid-template-columns: 1fr; }
  .project-card, .span-7, .span-6, .span-5 { grid-column: auto; }
  .card-media, .span-5 .card-media { height: 280px; }
  .index-card .card-body { min-height: 430px; }
  .video-grid { grid-template-columns: 1fr; }
  .video-card { grid-column: auto; }
  .equipment-block li { grid-template-columns: 1fr; gap: 7px; }
  .capability-list li { grid-template-columns: 50px 1fr; }
  .capability-list div { grid-template-columns: 1fr; gap: 9px; }
  .timeline article { grid-template-columns: 1fr; gap: 14px; }
  footer { width: min(100% - 28px, 1180px); flex-direction: column; }
}

@media (max-width: 480px) {
  .brand { font-size: .72rem; }
  nav { font-size: .78rem; }
  .project-gallery { grid-template-columns: 1fr; }
  .gallery-lead, .gallery-support, .gallery-support:nth-child(n + 4) { grid-column: span 1; height: 270px; }
  .gallery-lead { height: 320px; }
  .equipment-visuals { grid-template-columns: 1fr; }
  .equipment-visuals figure { height: 280px; }
  .equipment-visuals figure:last-child { height: 420px; }
  .card-media, .span-5 .card-media { height: 245px; }
  .card-body { min-height: 300px; padding: 24px; }
  .featured-video { padding: 14px; }
  .video-info { min-height: 116px; padding: 18px; }
  .media-pawprint { grid-template-columns: .8fr 1.2fr; }
  .hero-actions .button { width: 100%; }
}