:root {
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --bg: #070b14;
  --bg-2: #0c1220;
  --panel: #111827;
  --ink: #f3f6fb;
  --muted: #9aa7bd;
  --line: rgba(255, 255, 255, 0.08);
  --brand: #3b82f6;
  --brand-2: #25f4ee;
  --tk-pink: #fe2c55;
  --tg: #229ed9;
  --ok: #34d399;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --radius: 18px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --wrap: min(1180px, calc(100% - 48px));
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
:focus-visible { outline: 2px solid var(--brand-2); outline-offset: 3px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: #fff; color: #111; padding: 8px 12px; }
.wrap { width: var(--wrap); margin-inline: auto; }

.nav {
  position: sticky; top: 0; z-index: 40;
  background: rgba(7, 11, 20, 0.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: var(--space-4); min-height: 72px; }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; margin-right: auto; letter-spacing: 0.02em;
}
.logo-img {
  width: 36px; height: 36px; border-radius: 10px;
  box-shadow: 0 0 0 1px rgba(37, 244, 238, 0.22);
}
.logo-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #041018; display: grid; place-items: center;
  font-size: 0.74rem; font-weight: 900;
}
.nav-links { display: flex; gap: 28px; color: var(--muted); font-size: 0.92rem; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: #fff; }
.lang {
  color: var(--muted); font-weight: 700; font-size: 0.88rem;
  padding: 0 4px; white-space: nowrap;
}
.lang:hover { color: #fff; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px; padding: 0 20px; border-radius: 999px; border: 0;
  font-weight: 700; cursor: pointer;
  transition: transform 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--brand), #2563eb);
  color: #fff;
}
.btn-ghost {
  background: transparent; color: #fff;
  border: 1px solid rgba(255,255,255,.18);
}
.btn-dark { background: #fff; color: #0b1220; }
.btn-tg {
  background: var(--tg);
  color: #fff;
}
.menu-btn { display: none; width: 44px; height: 44px; border: 0; background: transparent; }
.menu-btn span, .menu-btn span::before, .menu-btn span::after {
  display: block; width: 18px; height: 2px; background: #fff; position: relative;
}
.menu-btn span::before, .menu-btn span::after { content: ""; position: absolute; left: 0; }
.menu-btn span::before { top: -6px; }
.menu-btn span::after { top: 6px; }

.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(900px 480px at 12% -8%, rgba(59,130,246,.28), transparent 58%),
    radial-gradient(760px 420px at 92% 8%, rgba(34,211,238,.14), transparent 50%),
    var(--bg);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 56px;
  align-items: center;
}
.kicker {
  display: inline-flex; gap: 8px; align-items: center;
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid rgba(34,211,238,.28);
  color: var(--brand-2); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em;
}
h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  line-height: 1.08; letter-spacing: -0.045em;
  margin: 16px 0 16px; font-weight: 800;
}
.lead { font-size: 1.08rem; color: var(--muted); max-width: 38rem; margin: 0; }
.hero-metric {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  margin: 18px 0 16px;
}
.hero-metric div { display: flex; align-items: baseline; gap: 8px; }
.hero-metric strong {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.05em;
  background: linear-gradient(90deg, #25f4ee, #fe2c55);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-metric span { color: var(--muted); font-size: 0.95rem; }
.hero-metric em { color: #64748b; font-style: normal; font-size: 1.6rem; font-weight: 700; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0 20px; }
.pills { display: flex; gap: 8px; flex-wrap: wrap; }
.pills span {
  padding: 6px 11px; border-radius: 999px;
  background: rgba(255,255,255,.04); border: 1px solid var(--line);
  font-size: 0.78rem; color: #dbe4f0;
}

.trust {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  margin-top: 48px;
}
.trust div { background: var(--bg-2); padding: 22px 20px; }
.trust b { display: block; font-size: 1.05rem; margin-bottom: 4px; }
.trust span { color: var(--muted); font-size: 0.86rem; }

.video-frame {
  background: #0a0f1c;
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,.35);
}
.video-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 16px; color: #8b97ad; font-size: 0.8rem;
  background: #10182a; border-bottom: 1px solid var(--line);
}
.video-bar i { width: 8px; height: 8px; border-radius: 50%; background: #334155; }
.video-frame video, .video-frame img { width: 100%; aspect-ratio: 16/10; object-fit: cover; background: #000; }

.section { padding: var(--space-20) 0; }
.section-k {
  color: var(--brand-2); font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.12em; margin: 0 0 10px; text-transform: uppercase;
}
.section-title {
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.03em;
}
.section-desc { color: var(--muted); max-width: 44rem; margin: 0 0 var(--space-10); }
.soft { background: var(--bg-2); }

.feat-grid, .scene-grid, .shot-grid, .price-grid, .dev-grid {
  display: grid; gap: 18px;
}
.feat-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.shot-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.price-grid, .dev-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
}
.card h3 { margin: 0 0 10px; font-size: 1.08rem; }
.card p, .card li { color: var(--muted); font-size: 0.95rem; }
.card ul { margin: 12px 0 0; padding: 0 0 0 18px; }

.split {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 40px; align-items: center;
}
.split.rev { grid-template-columns: 1.15fr 1fr; }
.split img {
  width: 100%; border-radius: 16px; border: 1px solid var(--line);
  height: 340px; object-fit: cover; object-position: top; background: #000;
}
.split .video-frame { margin: 0; }
.split .video-frame video, .split .video-frame img { height: 340px; object-fit: cover; object-position: top; }

.feat-switch { position: relative; }
.feat-radio {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
.tabs {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 10px 12px; margin-bottom: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  position: relative; z-index: 2;
}
.tabs .tab {
  flex: 1;
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 108px;
  min-height: 48px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; color: var(--muted); cursor: pointer;
  font-weight: 700;
}
.tabs .tab:hover { color: #fff; border-color: var(--brand-2); background: rgba(37,244,238,.12); }
.panel { display: none; }
#feat-reg:checked ~ .tabs label[for="feat-reg"],
#feat-warm:checked ~ .tabs label[for="feat-warm"],
#feat-pub:checked ~ .tabs label[for="feat-pub"],
#feat-acc:checked ~ .tabs label[for="feat-acc"],
#feat-engage:checked ~ .tabs label[for="feat-engage"] {
  color: #fff; border-color: var(--brand-2); background: rgba(37,244,238,.12);
}
#feat-reg:checked ~ [data-panel="reg"],
#feat-warm:checked ~ [data-panel="warm"],
#feat-pub:checked ~ [data-panel="pub"],
#feat-acc:checked ~ [data-panel="acc"],
#feat-engage:checked ~ [data-panel="engage"] {
  display: grid;
}

.scale-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.card .scale-num {
  margin: 0 0 8px;
  font-size: 2.1rem; font-weight: 800; letter-spacing: -0.04em;
  color: #25f4ee;
}
.card.highlight { border-color: rgba(37, 244, 238, 0.45); box-shadow: 0 0 0 1px rgba(254, 44, 85, 0.18); }
.card a { color: var(--brand-2); }

.scene {
  border-radius: 18px; overflow: hidden; border: 1px solid var(--line); background: var(--panel);
}
.scene img { width: 100%; height: 230px; object-fit: cover; object-position: top; }
.scene div { padding: 20px 22px 24px; }
.scene h3 { margin: 0 0 6px; }
.scene p { margin: 0; color: var(--muted); font-size: 0.94rem; }

.shot {
  border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #000;
}
.shot img { width: 100%; height: 220px; object-fit: cover; object-position: top; }
.shot figcaption { padding: 10px 12px; font-size: 0.82rem; color: var(--muted); background: var(--panel); }

.proof { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.proof figure {
  margin: 0;
  background: #ececec;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.proof img {
  width: 100%;
  height: 520px;
  object-fit: contain;
  object-position: top center;
  background: #ececec;
}
.proof figcaption {
  padding: 10px 14px;
  font-size: 0.84rem;
  color: var(--muted);
  background: var(--panel);
}

.price { position: relative; display: flex; flex-direction: column; }
.price.hot { border-color: var(--brand-2); }
.price .tag {
  position: absolute; top: -10px; right: 16px;
  background: var(--brand-2); color: #041018;
  font-size: 0.72rem; font-weight: 800; padding: 4px 10px; border-radius: 999px;
}
.price b { font-size: 2.1rem; letter-spacing: -0.04em; }
.price b small { font-size: 0.88rem; font-weight: 600; color: var(--muted); }
.price .btn { margin-top: auto; width: 100%; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); }
th { color: var(--brand-2); font-size: 0.84rem; }
tr:last-child td { border-bottom: 0; }
table a { color: var(--brand-2); }

.faq details { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 4px 18px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 16px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq p { color: var(--muted); margin: 0 0 16px; }
.faq-list { display: grid; gap: 10px; }

.cta-band {
  background: linear-gradient(135deg, #1d4ed8, #0e7490);
  color: #fff; border-radius: 22px; padding: 36px 40px;
  display: flex; justify-content: space-between; gap: 20px; align-items: center;
}
.cta-band p { margin: 8px 0 0; color: rgba(255,255,255,.86); }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.cta-band .btn-ghost { border-color: rgba(255,255,255,.45); color: #fff; }

.crumbs { font-size: 0.86rem; color: var(--muted); margin: 0 0 14px; }
.crumbs a { color: var(--brand-2); }
.more { margin-top: 20px; }
.more a { color: var(--brand-2); border-bottom: 1px solid rgba(34,211,238,.35); }
.prose { max-width: 46rem; color: var(--muted); }
.page-hero { padding: var(--space-16) 0 var(--space-8); }
.page-hero .lead { color: var(--muted); }

footer { padding: 40px 0 56px; color: var(--muted); font-size: 0.88rem; border-top: 1px solid var(--line); }
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.foot nav { display: flex; gap: 14px; flex-wrap: wrap; }
.foot nav a { color: #c5d4ee; }

.modal {
  position: fixed; inset: 0; display: none; place-items: center;
  background: rgba(0,0,0,.55); z-index: 50; padding: 16px;
}
.modal.open { display: grid; }
.modal-card { width: min(420px, 100%); background: #10182a; border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.field {
  width: 100%; margin: 8px 0 12px; padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--line); background: #0b1220; color: #fff;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

@media (max-width: 960px) {
  .hero-grid, .feat-grid, .scene-grid, .shot-grid, .price-grid, .dev-grid, .proof, .split, .split.rev, .trust, .scale-grid {
    grid-template-columns: 1fr;
  }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
    background: #0c1220; padding: 16px 24px; border-bottom: 1px solid var(--line);
  }
  .menu-btn { display: grid; place-items: center; }
  .nav { position: relative; }
  .nav-cta { padding: 0 12px; font-size: 0.88rem; }
  .cta-band { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 2.1rem; }
  .shot img, .scene img, .split img, .split .video-frame video { height: 210px; }
  .proof img { height: 380px; }
  .tabs .tab { flex: 1 1 calc(50% - 8px); }
}