:root {
  color-scheme: dark;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #f5f7fb;
  background: #070b14;
  font-synthesis: none;
  --bg: #070b14;
  --panel: #0d1422;
  --panel-soft: #111b2d;
  --line: rgba(255,255,255,.11);
  --muted: #9aa7bb;
  --cyan: #6ce5ed;
  --cyan-strong: #31cbd7;
  --red: #ff655f;
  --shell: min(1240px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: var(--bg); }
body::before { content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none; background: radial-gradient(circle at 78% 2%, rgba(31,150,175,.16), transparent 34%), radial-gradient(circle at 9% 35%, rgba(123,65,177,.08), transparent 29%); }
body::after { content: ""; position: fixed; inset: 0; z-index: -1; opacity: .2; pointer-events: none; background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(to bottom, black, transparent 72%); }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.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%; height: 78px; padding: 0 max(24px, calc((100vw - 1240px) / 2)); align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); background: rgba(7,11,20,.76); backdrop-filter: blur(20px); transition: background .25s ease; }
.site-header.is-scrolled { background: rgba(7,11,20,.94); }
.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: 11px; letter-spacing: .18em; }
.site-nav { display: flex; align-items: center; gap: 30px; color: #cbd4e2; font-size: 14px; }
.site-nav a { position: relative; padding: 10px 0; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 4px; height: 1px; background: var(--cyan); transition: right .2s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }
.nav-toggle { display: none; }

.hero { position: relative; display: grid; grid-template-columns: minmax(360px,.82fr) minmax(560px,1.18fr); min-height: calc(100svh - 78px); padding-block: clamp(72px,10vw,136px); align-items: center; gap: clamp(36px,5vw,84px); }
.hero-copy { position: relative; z-index: 2; }
.kicker { margin: 0 0 20px; color: var(--cyan); font-size: 12px; font-weight: 800; letter-spacing: .17em; }
.hero h1 { margin: 0; font-size: clamp(48px,4.2vw,62px); font-weight: 760; letter-spacing: -.055em; line-height: 1.02; }
.hero h1 em { color: var(--cyan); font-style: normal; text-shadow: 0 0 36px rgba(108,229,237,.26); }
.hero-summary { max-width: 640px; margin: 30px 0 0; color: #b7c2d3; font-size: clamp(17px,1.45vw,21px); line-height: 1.8; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; min-height: 48px; padding: 0 22px; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 999px; font-size: 14px; font-weight: 750; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #061115; background: var(--cyan); }
.button-primary:hover { background: #9bf7fb; }
.button-ghost { border-color: rgba(255,255,255,.22); color: #edf3f9; background: rgba(255,255,255,.035); }
.button-ghost:hover { border-color: rgba(108,229,237,.65); background: rgba(108,229,237,.08); }
.scope-note { margin: 22px 0 0; color: #77859a; font-size: 12px; }
.hero-visual { position: relative; padding: 11px; border: 1px solid rgba(108,229,237,.34); border-radius: 28px; background: rgba(12,19,33,.8); box-shadow: 0 40px 100px rgba(0,0,0,.44), 0 0 80px rgba(40,170,193,.1); transform: perspective(1200px) rotateY(-3deg) rotateX(1deg); }
.hero-visual::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none; background: linear-gradient(135deg, rgba(108,229,237,.35), transparent 32%, rgba(255,101,95,.22)); mask: linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0); mask-composite: exclude; padding: 1px; }
.hero-visual img { width: 100%; border-radius: 19px; aspect-ratio: 16/9; object-fit: cover; }
.visual-label { position: absolute; z-index: 2; top: 24px; left: 24px; padding: 8px 11px; border: 1px solid rgba(255,255,255,.14); border-radius: 999px; background: rgba(5,10,18,.76); backdrop-filter: blur(10px); color: #dce7f3; font-size: 11px; letter-spacing: .08em; }
.hero-orbit { position: absolute; z-index: -1; border: 1px solid rgba(108,229,237,.14); border-radius: 50%; pointer-events: none; }
.hero-orbit-one { width: 340px; height: 340px; right: 0; top: -120px; }
.hero-orbit-two { width: 220px; height: 220px; left: 0; bottom: -100px; border-color: rgba(255,101,95,.12); }

.intro-band { padding: 84px 0; border-block: 1px solid var(--line); background: rgba(255,255,255,.025); }
.intro-grid { display: grid; grid-template-columns: 150px 1.15fr .85fr; gap: 50px; align-items: start; }
.section-index { margin: 6px 0 0; color: #6e7d91; font: 700 11px/1.3 ui-monospace, SFMono-Regular, monospace; letter-spacing: .12em; }
.intro-grid h2, .section-heading h2, .detail-copy h2, .contact h2 { margin: 0; font-size: clamp(32px,4vw,55px); line-height: 1.12; letter-spacing: -.045em; }
.intro-grid > p:last-child, .section-heading-split > p { margin: 5px 0 0; color: var(--muted); font-size: 16px; line-height: 1.85; }

.showcase, .features, .scenes { padding-block: 120px; }
.section-heading { margin-bottom: 48px; }
.section-heading-split { display: grid; grid-template-columns: 1.2fr .8fr; gap: 60px; align-items: end; }
.section-heading-split > p { max-width: 480px; justify-self: end; }
.showcase-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.showcase-card { position: relative; overflow: hidden; min-height: 570px; border: 1px solid var(--line); border-radius: 24px; }
.showcase-card-light { color: #16202a; background: #eef2f4; }
.showcase-card-dark { background: #0c1320; }
.showcase-copy { padding: 34px 34px 26px; }
.showcase-copy span { color: #728095; font-size: 11px; font-weight: 800; letter-spacing: .16em; }
.showcase-copy h3 { margin: 12px 0 8px; font-size: 27px; letter-spacing: -.025em; }
.showcase-copy p { max-width: 460px; margin: 0; color: #69768a; line-height: 1.7; }
.showcase-card-dark .showcase-copy p { color: var(--muted); }
.showcase-card img { width: calc(100% - 32px); margin: 0 16px 16px; border-radius: 15px; box-shadow: 0 24px 55px rgba(0,0,0,.22); }

.features { border-block: 1px solid var(--line); background: linear-gradient(180deg, rgba(16,28,47,.72), rgba(7,11,20,.2)); }
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: var(--line); }
.feature-card { min-height: 272px; padding: 30px; background: #0b111d; transition: background .2s ease; }
.feature-card:hover { background: #111b2b; }
.feature-card.feature-wide { grid-column: span 2; }
.feature-card.feature-accent { background: linear-gradient(145deg, #0e5460, #0b2a37); }
.feature-card > span { display: inline-grid; width: 34px; height: 34px; place-items: center; border: 1px solid rgba(108,229,237,.3); border-radius: 50%; color: var(--cyan); font: 700 11px/1 ui-monospace, SFMono-Regular, monospace; }
.feature-card h3 { margin: 52px 0 12px; font-size: 23px; letter-spacing: -.02em; }
.feature-card p { max-width: 520px; margin: 0; color: var(--muted); line-height: 1.75; }

.detail-shot { display: grid; grid-template-columns: 1.45fr .55fr; gap: clamp(34px,6vw,84px); padding-block: 120px; align-items: center; }
.detail-shot > img { border: 1px solid rgba(255,255,255,.15); border-radius: 22px; box-shadow: 0 32px 80px rgba(0,0,0,.35); }
.detail-copy p:last-child { color: var(--muted); line-height: 1.85; }

.scenes { padding-top: 40px; }
.scene-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.scene-grid article { min-height: 300px; padding: 30px; border: 1px solid var(--line); border-radius: 20px; background: rgba(14,22,36,.72); }
.scene-grid span { color: var(--cyan); font-size: 12px; font-weight: 800; }
.scene-grid h3 { margin: 100px 0 12px; font-size: 24px; }
.scene-grid p { margin: 0; color: var(--muted); line-height: 1.75; }

.contact { display: flex; margin-bottom: 120px; padding: 54px; align-items: center; justify-content: space-between; gap: 40px; border: 1px solid rgba(108,229,237,.32); border-radius: 28px; background: radial-gradient(circle at 95% 30%, rgba(108,229,237,.16), transparent 34%), #0e1828; }
.contact h2 { max-width: 760px; font-size: clamp(30px,3.5vw,48px); }
.contact p:last-child { margin: 18px 0 0; color: var(--muted); }
.contact-actions { display: flex; flex-shrink: 0; gap: 10px; }

.site-footer { padding: 45px 0 52px; border-top: 1px solid var(--line); background: #05080e; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: start; }
.site-footer strong { font-size: 15px; }
.site-footer p, .footer-meta { color: #748196; font-size: 12px; line-height: 1.7; }
.site-footer nav { display: flex; gap: 22px; color: #a9b5c6; font-size: 13px; }
.site-footer nav a:hover, .footer-meta a:hover { color: var(--cyan); }
.footer-meta { display: flex; grid-column: 1 / -1; padding-top: 24px; justify-content: space-between; border-top: 1px solid var(--line); }

[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s 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: 980px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { max-width: 760px; }
  .hero-visual { transform: none; }
  .intro-grid { grid-template-columns: 100px 1fr; }
  .intro-grid > p:last-child { grid-column: 2; }
  .showcase-grid, .section-heading-split, .detail-shot { grid-template-columns: 1fr; }
  .section-heading-split > p { justify-self: start; }
  .feature-grid { grid-template-columns: repeat(2,1fr); }
  .feature-card.feature-wide { grid-column: span 1; }
  .scene-grid { grid-template-columns: 1fr; }
  .scene-grid article { min-height: 220px; }
  .scene-grid h3 { margin-top: 62px; }
  .contact { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 720px) {
  :root { --shell: min(100% - 30px, 1240px); }
  .site-header { height: 68px; padding-inline: 15px; }
  .brand img { width: 38px; height: 38px; }
  .brand strong { font-size: 12px; }
  .brand small { font-size: 9px; }
  .nav-toggle { display: grid; 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; transition: transform .2s ease; }
  .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: 68px; left: 0; right: 0; display: none; padding: 18px 24px 24px; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); background: rgba(7,11,20,.98); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 14px 0; }
  .hero { padding-block: 66px 80px; }
  .hero h1 { font-size: clamp(36px,11vw,50px); }
  .hero-summary { font-size: 16px; }
  .hero-actions, .contact-actions { width: 100%; flex-direction: column; }
  .button { width: 100%; }
  .intro-band { padding: 64px 0; }
  .intro-grid { grid-template-columns: 1fr; gap: 24px; }
  .intro-grid > p:last-child { grid-column: auto; }
  .showcase, .features, .scenes, .detail-shot { padding-block: 84px; }
  .showcase-card { min-height: 0; }
  .showcase-copy { padding: 26px 24px 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 238px; }
  .feature-card h3 { margin-top: 42px; }
  .contact { margin-bottom: 80px; padding: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .site-footer nav { flex-wrap: wrap; gap: 14px 20px; }
  .footer-meta { grid-column: auto; flex-direction: column; gap: 8px; }
}