:root {
  --bg: #07110d;
  --bg-soft: #0b1713;
  --panel: rgba(12, 26, 21, 0.84);
  --panel-2: rgba(18, 39, 31, 0.92);
  --line: rgba(129, 210, 166, 0.18);
  --text: #ebfff1;
  --muted: #9ac5ac;
  --accent: #58dd90;
  --accent-2: #9ef7bf;
  --warning: #d7ff73;
  --shadow: 0 22px 80px rgba(0, 0, 0, 0.35);
  --radius: 26px;
  --container: min(1180px, calc(100% - 2rem));
}

*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(88, 221, 144, 0.14), transparent 24%),
    radial-gradient(circle at 10% 20%, rgba(158, 247, 191, 0.08), transparent 22%),
    linear-gradient(180deg, #050b08 0%, #07110d 100%);
  color: var(--text);
  line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: var(--container); margin: 0 auto; }
.skip-link,.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.skip-link:focus {
  width: auto; height: auto; clip: auto; left: 1rem; top: 1rem; z-index: 100; background: #fff; color: #000; padding: .8rem 1rem; border-radius: 10px;
}
.site-header {
  position: sticky; top: 0; z-index: 20; backdrop-filter: blur(16px);
  background: rgba(4, 10, 8, 0.72); border-bottom: 1px solid rgba(129, 210, 166, 0.12);
}
.nav-wrap {
  min-height: 5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand { display: inline-flex; align-items: center; gap: .9rem; }
.brand span { display: grid; }
.brand strong { font-size: 1rem; font-weight: 800; letter-spacing: .04em; }
.brand small { color: var(--muted); font-size: .78rem; }
.site-nav { display: flex; gap: 1.25rem; align-items: center; }
.site-nav a { color: var(--muted); }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--text); }
.nav-toggle {
  display: none; width: 3rem; height: 3rem; border: 0; border-radius: 999px; background: rgba(88,221,144,.12);
}
.nav-toggle span { display: block; width: 1.2rem; height: 2px; margin: .28rem auto; background: var(--text); }
.hero, .section { padding: 5.5rem 0; }
.hero-sub { padding-top: 3.4rem; }
.hero-grid, .split-grid, .protocol-grid, .review-grid, .release-grid, .download-grid, .feature-grid { display: grid; gap: 1.3rem; }
.hero-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: center; }
.eyebrow {
  margin: 0 0 1rem; color: var(--warning); text-transform: uppercase; letter-spacing: .12em; font-size: .82rem; font-weight: 700;
}
h1, h2, h3 { margin: 0 0 1rem; line-height: 1.1; font-family: "Segoe UI Semibold", "PingFang SC", sans-serif; }
h1 { font-size: clamp(3rem, 6vw, 5.4rem); letter-spacing: -.04em; }
h2 { font-size: clamp(2rem, 3vw, 3rem); }
h3 { font-size: 1.3rem; }
p, li { color: var(--muted); }
.hero-lead, .section-head p { font-size: 1.06rem; max-width: 44rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin: 1.8rem 0; }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 3.15rem; padding: .82rem 1.3rem; border-radius: 999px; font-weight: 700; border: 1px solid transparent;
}
.button.primary { background: linear-gradient(135deg, var(--accent), #2fb16a); color: #07110d; }
.button.ghost { border-color: rgba(158,247,191,.22); color: var(--text); }
.text-link { color: var(--accent-2); font-weight: 700; }
.hero-data { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: .9rem; margin-top: 1.2rem; }
.hero-data div, .feature-card, .scene-card, .review-card, .faq-item, .release-card, .download-card, .cta-panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.hero-data div { padding: 1rem; }
.hero-data strong { display: block; color: var(--text); font-size: 1.4rem; }
.hero-art img, .protocol-art img { width: 100%; }
.section-head { margin-bottom: 2rem; max-width: 46rem; }
.feature-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.feature-card, .scene-card, .release-card, .download-card, .cta-panel { padding: 1.5rem; }
.feature-card ul { padding-left: 1.15rem; margin: 1rem 0 0; }
.split-grid { grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: start; }
.scene-stack { display: grid; gap: 1rem; }
.section-alt { background: linear-gradient(180deg, rgba(11,23,19,.9), rgba(8,19,15,.9)); }
.protocol-grid { grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); align-items: center; }
.protocol-list { display: grid; gap: 1rem; }
.protocol-list article { padding: 1rem 1.1rem; border-left: 3px solid var(--accent); background: rgba(18,39,31,.72); }
.section-deep { background: linear-gradient(180deg, #06100d, #040907); }
.review-grid { grid-template-columns: repeat(3, minmax(0,1fr)); align-items: start; }
.review-card { margin: 0; padding: 1.4rem; }
.review-card p { color: var(--text); }
.review-card footer { margin-top: 1rem; color: var(--accent-2); }
.faq-list { display: grid; gap: 1rem; }
.faq-item { padding: 0 1.2rem; }
.faq-item summary { list-style: none; cursor: pointer; padding: 1.15rem 0; color: var(--text); font-weight: 700; }
.faq-item p { margin: 0 0 1.15rem; }
.cta { padding-top: 0; }
.cta-panel { display: flex; justify-content: space-between; gap: 1.5rem; align-items: center; }
.download-grid, .release-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
.download-card span {
  display: inline-flex; padding: .28rem .7rem; border-radius: 999px; background: rgba(88,221,144,.12); color: var(--accent-2); font-size: .82rem; font-weight: 700;
}
.site-footer { padding: 1.6rem 0 2rem; border-top: 1px solid rgba(129, 210, 166, 0.12); }
.footer-wrap { display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.footer-wrap nav { display: flex; gap: 1rem; }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .45s ease, transform .45s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .hero-grid, .split-grid, .protocol-grid { grid-template-columns: 1fr; }
  .feature-grid, .review-grid, .download-grid, .release-grid, .hero-data { grid-template-columns: 1fr; }
  .cta-panel, .footer-wrap { flex-direction: column; align-items: start; }
}

@media (max-width: 840px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    display: none; position: absolute; top: calc(100% + .5rem); left: 1rem; right: 1rem; flex-direction: column; align-items: start;
    background: rgba(6,16,13,.96); border: 1px solid var(--line); border-radius: 18px; padding: 1rem;
  }
  .site-nav.is-open { display: flex; }
  .site-nav.nav-static { position: static; display: flex; flex-direction: row; padding: 0; background: transparent; border: 0; }
}