:root {
  color-scheme: dark;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #f5f7fb;
  background: #070b14;
  font-synthesis: none;
  --bg: #070b14;
  --line: rgba(255,255,255,.13);
  --muted: #a4b0c2;
  --cyan: #6ce5ed;
  --gutter: clamp(16px, 3vw, 64px);
  --shell: calc(100% - var(--gutter) - var(--gutter));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; min-width: 320px; background: radial-gradient(ellipse at 85% 4%, rgba(31,150,175,.12), transparent 28%), var(--bg); }
main, section, article, header, footer { min-width: 0; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--cyan); outline-offset: 5px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 12px 16px; border-radius: 8px; color: #071016; background: var(--cyan); }
.skip-link:focus { top: 16px; }
.section-shell { width: var(--shell); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 50; display: flex; width: 100%; min-height: 78px; padding: 12px var(--gutter); align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); background: rgba(7,11,20,.88); backdrop-filter: blur(20px); }
.site-header.is-scrolled { background: rgba(7,11,20,.96); }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand img { width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.16); border-radius: 11px; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 14px; letter-spacing: .13em; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 12px; letter-spacing: .16em; }
.site-nav { display: flex; align-items: center; gap: clamp(20px,2.5vw,40px); color: #cbd4e2; font-size: 14px; }
.site-nav a { display: flex; min-height: 44px; align-items: center; }
.site-nav a:hover { color: var(--cyan); }
.nav-toggle { display: none; }

.hero { position: relative; display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1.25fr); min-height: calc(100svh - 78px); padding-block: clamp(64px,6vw,100px); align-items: center; gap: clamp(32px,4vw,72px); }
.hero > * { min-width: 0; }
.hero-copy { position: relative; z-index: 2; }
.kicker { margin: 0 0 20px; color: var(--cyan); font-size: 12px; font-weight: 800; letter-spacing: .14em; line-height: 1.6; }
.hero h1 { margin: 0; font-size: clamp(48px,4.6vw,88px); font-weight: 760; letter-spacing: -.045em; line-height: 1.1; }
.hero h1 em { color: var(--cyan); font-style: normal; }
.hero-summary { max-width: 36rem; margin: 28px 0 0; color: #b7c2d3; font-size: clamp(17px,1.3vw,21px); line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; min-height: 48px; padding: 12px 24px; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 999px; font-size: 14px; font-weight: 750; text-align: center; transition: background .2s ease, border-color .2s ease; }
.button-primary { color: #061115; background: var(--cyan); }
.button-primary:hover { background: #9bf7fb; }
.button-ghost { border-color: rgba(255,255,255,.25); color: #edf3f9; background: rgba(255,255,255,.035); }
.button-ghost:hover { border-color: var(--cyan); background: rgba(108,229,237,.08); }
.scope-note { max-width: 38rem; margin: 22px 0 0; color: #94a2b7; font-size: 12px; line-height: 1.8; }
.hero-visual { position: relative; padding: 12px; border: 1px solid rgba(108,229,237,.32); border-radius: 20px; background: #0c1321; box-shadow: 0 24px 72px rgba(0,0,0,.3); }
.hero-visual img { width: 100%; height: auto; object-fit: contain; }
.visual-label { display: block; margin: 2px 4px 14px; color: #c4d2e2; font-size: 12px; line-height: 1.6; }
.hero-orbit { position: absolute; z-index: -1; max-width: 100%; border: 1px solid rgba(108,229,237,.1); border-radius: 50%; pointer-events: none; }
.hero-orbit-one { width: 340px; height: 340px; right: 0; top: -48px; }
.hero-orbit-two { width: 220px; height: 220px; left: 0; bottom: -48px; border-color: rgba(255,101,95,.1); }

.intro-band { padding: clamp(40px,4vw,64px) 0; border-block: 1px solid var(--line); background: rgba(255,255,255,.025); }
.intro-grid { display: grid; grid-template-columns: minmax(80px,.25fr) minmax(0,1fr) minmax(0,1fr); gap: clamp(24px,4vw,64px); align-items: start; }
.section-index { margin: 6px 0 0; color: #9aa9bd; font: 700 12px/1.5 ui-monospace, SFMono-Regular, monospace; letter-spacing: .1em; }
.intro-grid h2, .section-heading h2, .detail-copy h2, .contact h2 { margin: 0; font-size: clamp(30px,2.8vw,48px); line-height: 1.25; letter-spacing: -.03em; }
.intro-grid > p:last-child, .section-heading-split > p { max-width: 40rem; margin: 3px 0 0; color: var(--muted); font-size: 16px; line-height: 1.85; }

.showcase, .features, .scenes { padding-block: clamp(64px,6vw,100px); }
.section-heading { margin-bottom: 36px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0,1.2fr) minmax(0,.8fr); gap: 48px; align-items: end; }
.section-heading-split > p { justify-self: end; }
.showcase-grid { display: grid; grid-template-columns: minmax(0,1fr); gap: 24px; }
.showcase-card { display: grid; grid-template-columns: minmax(0,.3fr) minmax(0,.7fr); align-items: center; gap: 24px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; }
.showcase-card-light { color: #16202a; background: #eef2f4; }
.showcase-card-dark { background: #0c1320; }
.showcase-copy { padding: 12px clamp(0px,1vw,20px); }
.showcase-copy > span { color: #8293aa; font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.showcase-card-light .showcase-copy > span { color: #56667b; }
.showcase-copy h3 { margin: 20px 0 14px; font-size: clamp(26px,2.3vw,38px); letter-spacing: -.025em; }
.showcase-copy p { max-width: 30rem; margin: 0; color: #566477; font-size: 16px; line-height: 1.85; }
.showcase-card-dark .showcase-copy p { color: var(--muted); }
.shot-link, .detail-image-link, .hero-image-link { display: block; min-width: 0; border: 1px solid rgba(255,255,255,.14); border-radius: 6px; background: #05080e; }
.shot-link img, .detail-image-link img { width: 100%; height: auto; object-fit: contain; }
.shot-link span, .detail-image-link span, .hero-image-link span { display: block; padding: 12px 14px; color: #b8c8dc; background: #080d16; font-size: 14px; line-height: 1.5; text-align: right; border-radius: 0 0 6px 6px; }
.shot-link:hover span, .detail-image-link:hover span, .hero-image-link:hover span { color: var(--cyan); }

.features { border-block: 1px solid var(--line); background: #0c1422; }
.feature-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 16px; }
.feature-card { min-height: 220px; padding: clamp(22px,2vw,32px); border: 1px solid var(--line); border-radius: 14px; background: #0b111d; }
.feature-card.feature-accent { background: linear-gradient(145deg,#10343e,#0c202c); border-color: rgba(108,229,237,.25); }
.feature-card > span { color: var(--cyan); font: 700 12px/1.5 ui-monospace, SFMono-Regular, monospace; }
.feature-card h3 { margin: 24px 0 12px; font-size: 22px; line-height: 1.4; letter-spacing: -.02em; }
.feature-card p { max-width: 38rem; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.75; }

.detail-shot { display: grid; grid-template-columns: minmax(0,1.4fr) minmax(0,.6fr); gap: clamp(32px,5vw,80px); padding-block: clamp(64px,6vw,100px); align-items: center; }
.detail-copy p:last-child { max-width: 36rem; color: var(--muted); font-size: 16px; line-height: 1.85; }
.scenes { padding-top: 16px; }
.scene-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; }
.scene-grid article { padding: 30px; border-top: 1px solid rgba(108,229,237,.32); background: rgba(14,22,36,.5); }
.scene-grid span { color: var(--cyan); font-size: 14px; }
.scene-grid h3 { margin: 28px 0 12px; font-size: 24px; line-height: 1.45; }
.scene-grid p { max-width: 38rem; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.75; }
.contact { display: flex; margin-bottom: 80px; padding: clamp(28px,4vw,54px); align-items: center; justify-content: space-between; gap: 40px; border: 1px solid rgba(108,229,237,.32); border-radius: 20px; background: radial-gradient(circle at 95% 30%,rgba(108,229,237,.1),transparent 50%),#0e1828; }
.contact > div { min-width: 0; }
.contact h2 { max-width: 48rem; font-size: clamp(28px,2.5vw,42px); }
.contact p:last-child { margin: 18px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.contact-actions { display: flex; flex-shrink: 0; gap: 12px; }
.site-footer { padding: 40px 0; border-top: 1px solid var(--line); background: #05080e; }
.footer-grid { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 24px; align-items: start; }
.site-footer strong { font-size: 15px; }
.site-footer p, .footer-meta { color: #9ba8ba; font-size: 12px; line-height: 1.8; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 14px 24px; color: #a9b5c6; font-size: 14px; }
.site-footer nav a { min-height: 44px; display: inline-flex; align-items: center; }
.site-footer a:hover { color: var(--cyan); }
.footer-meta { display: flex; grid-column: 1 / -1; padding-top: 24px; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); }

[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .5s ease, transform .5s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } [data-reveal] { opacity: 1; transform: none; transition: none; } .button { transition: none; } }
@media (max-width: 1100px) {
  .hero { grid-template-columns: minmax(0,1fr); min-height: auto; gap: 40px; }
  .hero-copy { max-width: 46rem; }
  .hero h1 { font-size: clamp(46px,6vw,66px); }
  .hero-visual { width: 100%; }
  .feature-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .intro-grid { grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
  .section-index { grid-column: 1 / -1; }
  .contact { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 980px) {
  .showcase-card, .detail-shot { grid-template-columns: minmax(0,1fr); }
  .showcase-copy { padding: 4px 4px 8px; }
  .section-heading-split { grid-template-columns: minmax(0,1fr); gap: 20px; }
  .section-heading-split > p { justify-self: start; }
  .scene-grid { grid-template-columns: minmax(0,1fr); gap: 16px; }
  .detail-copy { grid-row: 1; }
  .footer-grid { grid-template-columns: minmax(0,1fr); }
}
@media (max-width: 720px) {
  html { scroll-padding-top: 84px; }
  .site-header { min-height: 68px; padding-block: 10px; gap: 12px; }
  .brand { gap: 10px; }
  .brand img { width: 38px; height: 38px; }
  .brand strong { font-size: 12px; }
  .brand small { font-size: 12px; letter-spacing: .08em; }
  .nav-toggle { display: grid; flex-shrink: 0; width: 44px; height: 44px; place-content: center; gap: 6px; border: 0; color: white; background: transparent; }
  .nav-toggle i { display: block; width: 23px; height: 1px; background: currentColor; }
  .nav-toggle[aria-expanded="true"] i:first-of-type { transform: translateY(3.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] i:last-of-type { transform: translateY(-3.5px) rotate(-45deg); }
  .site-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: 12px var(--gutter) 20px; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); background: #070b14; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px 0; min-height: 48px; }
  .hero { padding-block: 48px 56px; gap: 36px; }
  .hero h1 { font-size: clamp(38px,10.5vw,56px); }
  .hero-summary { font-size: 16px; margin-top: 22px; }
  .kicker { letter-spacing: .08em; margin-bottom: 16px; }
  .hero-actions, .contact-actions { width: 100%; }
  .hero-actions .button, .contact-actions .button { flex: 1 1 auto; }
  .hero-visual { padding: 8px; border-radius: 12px; }
  .visual-label { margin-bottom: 10px; }
  .hero-orbit { display: none; }
  .intro-grid, .feature-grid { grid-template-columns: minmax(0,1fr); gap: 20px; }
  .section-index { grid-column: auto; }
  .showcase, .features, .scenes, .detail-shot { padding-block: 56px; }
  .showcase-card { padding: 16px; gap: 20px; border-radius: 14px; }
  .showcase-copy h3 { margin-top: 12px; }
  .showcase-grid { gap: 18px; }
  .feature-card { min-height: 0; padding: 24px; }
  .feature-card h3 { margin-top: 20px; }
  .scene-grid article { padding: 24px; }
  .contact { margin-bottom: 56px; padding: 28px 22px; gap: 24px; }
  .contact-actions { flex-wrap: wrap; }
  .footer-meta { grid-column: auto; flex-direction: column; gap: 8px; }
}