:root {
  --bg: #07080c;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-strong: rgba(255, 255, 255, 0.10);
  --line: rgba(255, 255, 255, 0.13);
  --line-soft: rgba(255, 255, 255, 0.07);
  --txt: #e8ecf2;
  --dim: #98a2af;
  --dim-2: #6d7683;
  --accent: #f7b05e;
  --accent-2: #ffd79a;
  --accent-soft: rgba(247, 176, 94, 0.16);
  --seal: #d43737;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.45);
  --font: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--txt);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

#bgLayer {
  position: fixed; inset: -40px;
  background-size: cover; background-position: center 30%;
  filter: brightness(0.42) saturate(0.95) blur(18px);
  transform: scale(1.06);
  z-index: 0;
  transition: background-image .5s ease;
}
#bgVeil {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(8, 10, 15, 0.35), rgba(4, 5, 8, 0.86) 68%),
    linear-gradient(180deg, rgba(4, 5, 8, 0.72), rgba(4, 5, 8, 0.94));
}

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px;
  padding: 14px 32px;
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  background: rgba(10, 12, 17, 0.55);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease;
}
.nav.scrolled { background: rgba(8, 10, 14, 0.82); border-bottom-color: var(--line-soft); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--txt); flex: 0 0 auto; }
.brand img { filter: drop-shadow(0 6px 16px rgba(247, 176, 94, 0.35)); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 16px; letter-spacing: .5px; }
.brand-text em { font-style: normal; font-size: 10px; letter-spacing: 2.4px; color: var(--dim-2); }
.nav-links { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.nav-links a {
  color: var(--dim); text-decoration: none; font-size: 13.5px;
  padding: 8px 12px; border-radius: 999px; transition: .2s ease;
}
.nav-links a:hover { color: var(--txt); background: var(--panel); }
.nav-actions { display: flex; gap: 10px; align-items: center; }

.solid-btn, .ghost-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  text-decoration: none; font-size: 13.5px; border-radius: 999px;
  padding: 10px 18px; transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  border: 1px solid transparent; white-space: nowrap;
}
.solid-btn {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #241505; font-weight: 700;
  box-shadow: 0 10px 26px rgba(247, 176, 94, 0.28);
}
.solid-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(247, 176, 94, 0.38); }
.ghost-btn { background: var(--panel); border-color: var(--line); color: var(--txt); }
.ghost-btn:hover { background: var(--panel-strong); border-color: rgba(247, 176, 94, 0.5); }
.big { padding: 13px 26px; font-size: 15px; }
.small { padding: 7px 13px; font-size: 12.5px; }

/* ---------- hero ---------- */
.hero {
  position: relative; z-index: 2;
  min-height: 92vh; padding: 150px 32px 90px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-media { position: absolute; inset: 0; z-index: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; opacity: 1; filter: brightness(.78) saturate(1.05); }
.hero-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6, 8, 12, 0.35), rgba(5, 6, 10, 0.92) 72%);
}
.hero-inner { position: relative; z-index: 1; max-width: 980px; text-align: center; }
.badge {
  display: inline-block; padding: 7px 16px; margin-bottom: 20px;
  border: 1px solid rgba(247, 176, 94, 0.4); border-radius: 999px;
  background: rgba(247, 176, 94, 0.10); color: var(--accent-2);
  font-size: 12.5px; letter-spacing: 1px;
}
.hero h1 {
  margin: 0 0 14px; font-size: clamp(40px, 7vw, 76px);
  letter-spacing: 6px; line-height: 1.12;
  background: linear-gradient(180deg, #fff, #f3d6ac 60%, #d79a52);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 18px 60px rgba(247, 176, 94, 0.18);
}
.hero-sub { margin: 0 auto 22px; max-width: 720px; color: #c9d1db; font-size: 15.5px; }
.poem { display: flex; flex-direction: column; gap: 2px; margin: 0 auto 30px; }
.poem span { font-size: 15px; letter-spacing: 4px; color: var(--accent-2); opacity: .92; }
.poem span + span { color: var(--dim); letter-spacing: 3px; font-size: 13px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  margin: 46px auto 0; max-width: 860px;
}
.stat {
  padding: 16px 12px; border-radius: var(--radius-sm);
  background: var(--panel); border: 1px solid var(--line-soft);
  backdrop-filter: blur(10px);
}
.stat b { display: block; font-size: 24px; color: var(--accent-2); letter-spacing: 1px; }
.stat span { font-size: 12px; color: var(--dim); }
.hero-meta { display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; margin-top: 26px; font-size: 12.5px; color: var(--dim-2); }
.hero-meta b { color: var(--dim); font-weight: 600; }

/* ---------- announce ---------- */
.announce {
  position: relative; z-index: 2;
  display: flex; align-items: center; gap: 12px;
  max-width: 1080px; margin: -18px auto 0; padding: 14px 22px;
  border-radius: 999px; background: rgba(247, 176, 94, 0.08);
  border: 1px solid rgba(247, 176, 94, 0.28); color: #f0dcc0; font-size: 13.5px;
}
.announce .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); flex: 0 0 auto; }

/* ---------- sections ---------- */
.section { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; padding: 84px 32px; }
.section-head { margin-bottom: 38px; }
.kicker { display: block; font-size: 11px; letter-spacing: 3.6px; color: var(--accent); opacity: .85; margin-bottom: 10px; }
.section-head h2 { margin: 0 0 10px; font-size: clamp(24px, 3.4vw, 34px); letter-spacing: 1.5px; }
.section-head p { margin: 0; color: var(--dim); max-width: 760px; font-size: 14px; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 16px; }
.feature-card {
  position: relative; padding: 22px 22px 20px; border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(255,255,255,.075), rgba(255,255,255,.028));
  border: 1px solid var(--line-soft);
  backdrop-filter: blur(14px);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
  overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(80% 60% at 0% 0%, rgba(247,176,94,.14), transparent 60%);
  opacity: 0; transition: opacity .25s ease;
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(247,176,94,.38); box-shadow: var(--shadow); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: var(--accent-soft); border: 1px solid rgba(247,176,94,.28); margin-bottom: 14px;
  color: var(--accent-2);
}
.feature-card h3 { margin: 0 0 8px; font-size: 16.5px; letter-spacing: .4px; }
.feature-card p { margin: 0 0 14px; color: var(--dim); font-size: 13.2px; line-height: 1.75; }
.tag { font-size: 11px; letter-spacing: 1.6px; color: var(--accent); border: 1px solid rgba(247,176,94,.3); border-radius: 999px; padding: 3px 10px; }

.theme-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.theme-card {
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid var(--line-soft); background: #0b0e14; cursor: pointer;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.theme-card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; display: block; transition: transform .5s ease, filter .3s ease; filter: saturate(.98) brightness(.94); }
.theme-card:hover { transform: translateY(-3px); border-color: rgba(247,176,94,.45); box-shadow: 0 16px 34px rgba(0,0,0,.5); }
.theme-card:hover img { transform: scale(1.05); filter: saturate(1.05) brightness(1.02); }
.theme-meta { padding: 10px 12px 12px; display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.theme-meta b { font-size: 13.5px; }
.theme-meta span { font-size: 11px; color: var(--dim-2); text-align: right; }

.shot-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.shot-card { position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line-soft); cursor: zoom-in; background: #0a0d12; }
.shot-card img { width: 100%; display: block; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .5s ease; }
.shot-card:hover img { transform: scale(1.04); }
.shot-cap { position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 16px 12px; font-size: 12.5px; color: #d8dee7; background: linear-gradient(180deg, transparent, rgba(4,5,8,.92)); }

/* ---------- preview ---------- */
.preview-frame {
  position: relative; border-radius: 22px; overflow: hidden;
  border: 1px solid rgba(247,176,94,.28);
  background: #05070a; box-shadow: 0 26px 70px rgba(0,0,0,.55), 0 0 0 1px rgba(255,255,255,.04) inset;
}
.preview-frame iframe { width: 100%; height: 680px; border: 0; display: block; background: #05070a; }
.preview-skeleton { position: absolute; inset: 0; display: grid; place-items: center; color: var(--dim-2); font-size: 13px; pointer-events: none; }
.preview-skeleton.hidden { display: none; }
.preview-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 18px; border-top: 1px solid var(--line-soft); background: rgba(9,11,16,.72); font-size: 12px; color: var(--dim-2); }

/* ---------- download ---------- */
.download-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.download-card {
  padding: 24px; border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(247,176,94,.14), rgba(255,255,255,.03) 55%);
  border: 1px solid rgba(247,176,94,.3);
  display: flex; flex-direction: column; gap: 10px;
}
.download-card h3 { margin: 0; font-size: 17px; }
.download-card .meta { display: flex; gap: 12px; flex-wrap: wrap; font-size: 12px; color: var(--dim); }
.download-card .meta b { color: var(--accent-2); font-weight: 600; }
.download-card p { margin: 0; font-size: 12.8px; color: var(--dim); }
.download-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }
.download-card.empty { border-style: dashed; border-color: var(--line); background: var(--panel); color: var(--dim); }

.install-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin-top: 26px; }
.step { display: flex; gap: 12px; padding: 16px; border-radius: var(--radius-sm); background: var(--panel); border: 1px solid var(--line-soft); }
.step i {
  flex: 0 0 auto; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center;
  font-style: normal; font-size: 13px; font-weight: 700; color: #241505;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
}
.step b { display: block; font-size: 13.5px; margin-bottom: 3px; }
.step span { font-size: 12.2px; color: var(--dim); }

/* ---------- faq ---------- */
.faq-list { display: flex; flex-direction: column; gap: 10px; max-width: 900px; }
.faq-item { border: 1px solid var(--line-soft); border-radius: var(--radius-sm); background: var(--panel); overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: 0; color: var(--txt);
  padding: 16px 18px; font-size: 14px; font-family: inherit; cursor: pointer;
  display: flex; align-items: center; gap: 12px;
}
.faq-q .plus { margin-left: auto; color: var(--accent); transition: transform .2s ease; font-size: 16px; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; color: var(--dim); font-size: 13.2px; }
.faq-a > div { padding: 0 18px 18px; }
.faq-item.open .faq-a { max-height: 420px; }

/* ---------- timeline ---------- */
.timeline { position: relative; padding-left: 22px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 1px; background: linear-gradient(180deg, rgba(247,176,94,.5), rgba(255,255,255,.06)); }
.tl-item { position: relative; padding: 0 0 30px 18px; }
.tl-item::before { content: ""; position: absolute; left: -22px; top: 6px; width: 11px; height: 11px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px rgba(247,176,94,.6); }
.tl-date { font-size: 12px; letter-spacing: 1.4px; color: var(--accent-2); }
.tl-list { margin: 10px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 7px; }
.tl-list li { font-size: 13.2px; color: var(--dim); padding-left: 16px; position: relative; }
.tl-list li::before { content: "—"; position: absolute; left: 0; color: var(--dim-2); }

/* ---------- footer ---------- */
.footer { position: relative; z-index: 2; border-top: 1px solid var(--line-soft); background: rgba(6,8,12,.72); }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 30px 32px; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-brand strong { display: block; font-size: 13.5px; }
.footer-brand p { margin: 2px 0 0; font-size: 11.5px; color: var(--dim-2); }
.footer-links { display: flex; gap: 16px; font-size: 12.5px; }
.footer-links a { color: var(--dim); text-decoration: none; }
.footer-links a:hover { color: var(--accent-2); }

/* ---------- lightbox / toast ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 90; background: rgba(3,4,7,.92);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  padding: 40px; backdrop-filter: blur(8px);
}
.lightbox img { max-width: 92vw; max-height: 82vh; border-radius: 14px; border: 1px solid var(--line); box-shadow: 0 30px 80px rgba(0,0,0,.6); }
.lightbox p { margin: 0; font-size: 13px; color: var(--dim); }
.lb-close { position: absolute; top: 22px; right: 26px; background: var(--panel); border: 1px solid var(--line); color: var(--txt); width: 40px; height: 40px; border-radius: 50%; cursor: pointer; font-size: 16px; }

.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%);
  z-index: 95; padding: 12px 22px; border-radius: 999px;
  background: rgba(15,18,25,.94); border: 1px solid rgba(247,176,94,.4);
  color: #f4e3c8; font-size: 13px; box-shadow: var(--shadow);
}

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.static-mode .reveal { opacity: 1 !important; transform: none !important; }
.static-mode html, .static-mode body { scroll-behavior: auto !important; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .nav { padding: 12px 16px; gap: 12px; }
  .nav-links { display: none; }
  .hero { padding: 120px 18px 70px; min-height: auto; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 60px 18px; }
  .preview-frame iframe { height: 520px; }
  .footer-inner { padding: 24px 18px; }
}

.static-mode .hero { min-height: 640px !important; }