:root {
  --bg: #000000;
  --bg-2: #070707;
  --card: #111111;
  --card-2: #161616;
  --orange: #ff4d00;
  --orange-2: #ff8a00;
  --flame: #ffd24a;
  --text: #f4f4f4;
  --muted: #9a9a9a;
  --line: #222222;
  --ok: #3dffa0;
  --hl: #ff4d00;
  --radius: 18px;
  --shadow: 0 20px 50px rgba(255, 77, 0, 0.18);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
.skip {
  position: absolute; left: -999px; top: 8px;
}
.skip:focus { left: 12px; z-index: 80; background: var(--orange); color: #000; padding: 8px 12px; border-radius: 8px; }

.container { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }
.grad-text {
  background: linear-gradient(90deg, #fff 0%, #ffd24a 42%, #ff4d00 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(90deg, var(--orange), var(--orange-2));
  color: #140800; box-shadow: 0 10px 30px rgba(255, 77, 0, .35);
}
.btn-ghost {
  border: 1px solid #3a3a3a; color: #fff; background: rgba(255,255,255,.04);
}

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(0,0,0,.78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand img { width: 42px; height: 42px; object-fit: contain; filter: drop-shadow(0 0 10px rgba(255,77,0,.6)); }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--muted); font-weight: 600; }
.site-nav a:hover, .site-nav a.is-on { color: #fff; }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--line); }
.nav-toggle span, .nav-toggle span:before, .nav-toggle span:after {
  display: block; width: 18px; height: 2px; background: #fff; margin: 0 auto; position: relative;
}
.nav-toggle span:before, .nav-toggle span:after { content: ""; position: absolute; left: 0; }
.nav-toggle span:before { top: -6px; }
.nav-toggle span:after { top: 6px; }

.hero {
  position: relative;
  padding: 72px 0 40px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 50% at 78% 88%, rgba(255,77,0,.38), transparent 62%),
    radial-gradient(ellipse 35% 30% at 18% 12%, rgba(255,210,74,.08), transparent 60%),
    #000;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px; background: rgba(255,77,0,.12);
  color: var(--flame); border: 1px solid rgba(255,77,0,.35); font-size: 13px; font-weight: 700;
}
.hero h1 { font-size: clamp(32px, 5vw, 56px); line-height: 1.15; margin: 16px 0 14px; }
.lead { color: var(--muted); font-size: 18px; max-width: 560px; }
.sell { margin: 22px 0; display: grid; gap: 10px; }
.sell li { list-style: none; display: flex; gap: 10px; align-items: flex-start; color: #ddd; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0 18px; }
.os-hint { display: flex; gap: 10px; color: var(--muted); font-size: 13px; align-items: center; }
.os-hint svg { width: 18px; height: 18px; }

.flame-core {
  position: absolute; right: 8%; bottom: -80px; width: 280px; height: 360px; pointer-events: none;
  background: radial-gradient(ellipse at center top, rgba(255,210,74,.95), rgba(255,77,0,.55) 42%, transparent 70%);
  filter: blur(8px); animation: flame 1.1s ease-in-out infinite; z-index: 0;
}
@keyframes flame {
  0%,100% { transform: translateY(0) scaleY(1); opacity: .85; }
  50% { transform: translateY(12px) scaleY(1.12); opacity: 1; }
}

.visual { position: relative; z-index: 1; }
.mock-window {
  background: #0d0d0d; border: 1px solid #2a2a2a; border-radius: 20px;
  box-shadow: var(--shadow); overflow: hidden;
}
.mock-bar { display: flex; gap: 6px; padding: 12px 14px; background: #141414; border-bottom: 1px solid #262626; }
.mock-bar i { width: 9px; height: 9px; border-radius: 50%; display: block; background: #333; }
.mock-bar i:nth-child(1){ background: #ff5f57; }
.mock-bar i:nth-child(2){ background: #febc2e; }
.mock-bar i:nth-child(3){ background: #28c840; }
.mock-body { padding: 16px; display: grid; gap: 12px; }
.status-card, .node-list { background: #151515; border: 1px solid #262626; border-radius: 14px; padding: 14px; }
.status-top { display: flex; justify-content: space-between; align-items: center; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.node-list p { display: flex; justify-content: space-between; color: #cfcfcf; font-size: 14px; padding: 6px 0; border-bottom: 1px solid #222; }
.node-list p:last-child { border: 0; }
.float-card {
  position: absolute; background: #111; border: 1px solid rgba(255,77,0,.4);
  border-radius: 14px; padding: 12px 14px; min-width: 128px; box-shadow: var(--shadow);
}
.float-card strong { display: block; color: var(--orange-2); font-size: 22px; }
.fc-a { top: 18px; right: -18px; }
.fc-b { bottom: 28px; left: -18px; }

.platform-strip { padding: 28px 0 10px; }
.plat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.plat-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px;
  min-height: 160px; transition: border-color .2s ease, transform .2s ease;
}
.plat-card:hover { border-color: var(--orange); transform: translateY(-3px); }
.plat-card h3 { margin: 10px 0 6px; }
.plat-card p { color: var(--muted); font-size: 13px; }
.plat-card svg { width: 28px; height: 28px; color: var(--orange); }

.stats-band { padding: 36px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; background: linear-gradient(180deg, #120800, #0a0a0a); border: 1px solid #2a1608; border-radius: 20px; padding: 22px; }
.stat { text-align: center; }
.stat b { display: block; font-size: 32px; color: var(--flame); }
.stat span { color: var(--muted); font-size: 14px; }

.section { padding: 56px 0; }
.section h2 { font-size: 32px; margin-bottom: 8px; }
.sub { color: var(--muted); margin-bottom: 28px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature, .trust, .review {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px;
}
.feature svg, .trust svg { width: 32px; height: 32px; color: var(--orange); margin-bottom: 12px; }
.feature h3, .trust h3, .review h3 { margin-bottom: 8px; }
.feature p, .trust p, .review p { color: var(--muted); }

.tech-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.tech {
  background: var(--card-2); border: 1px solid var(--line); border-radius: 20px; padding: 24px;
}
.tech-visual { margin-bottom: 16px; border-radius: 14px; overflow: hidden; background: #0b0b0b; }
.tech-visual img { width: 100%; height: 180px; object-fit: cover; }
.step { display: grid; grid-template-columns: 48px 1fr; gap: 12px; margin-top: 16px; }
.num { color: var(--orange); font-weight: 800; font-size: 22px; }

.score-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; color: var(--muted); }
.stars { color: var(--flame); letter-spacing: 2px; }
.review-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.avatar {
  width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; margin-bottom: 10px;
}
.a1 { background: #ff4d00; color: #140800; }
.a2 { background: #ff8a00; color: #140800; }
.a3 { background: #ffd24a; color: #140800; }
.a4 { background: #ff6a3d; color: #140800; }
.tag { font-size: 12px; color: var(--orange-2); font-weight: 700; }
.stamp { font-size: 12px; color: #666; margin-top: 10px; }

.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.news-grid { display: grid; grid-template-columns: 1.2fr .9fr; gap: 16px; }
.news-card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
.news-card img { width: 100%; height: 220px; object-fit: cover; }
.news-card div { padding: 18px; }
.news-card p { color: var(--muted); }

.table-wrap { overflow: auto; border: 1px solid var(--line); border-radius: 16px; }
.cmp-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.cmp-table th, .cmp-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: center; }
.cmp-table th { background: #101010; }
.cmp-table td.hl, .cmp-table th.hl { background: rgba(255,77,0,.12); color: #fff; font-weight: 700; }
.note { color: #777; font-size: 13px; margin-top: 10px; }

.faq-list { display: grid; gap: 10px; }
.faq-item { background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.faq-item button {
  width: 100%; text-align: left; padding: 16px 18px; font-weight: 700; display: flex; justify-content: space-between;
}
.faq-item .ans { display: none; padding: 0 18px 16px; color: var(--muted); }
.faq-item.open .ans { display: block; }
.faq-item button span { color: var(--orange); }

.cta-band {
  margin: 20px 0 40px; padding: 42px 28px; border-radius: 24px; text-align: center;
  background:
    radial-gradient(ellipse at center bottom, rgba(255,77,0,.45), transparent 58%),
    #090909;
  border: 1px solid #2b1608;
}
.cta-band h2 { font-size: 34px; margin-bottom: 10px; }
.cta-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 18px; }

.site-footer { border-top: 1px solid var(--line); padding: 42px 0 24px; background: #050505; }
.foot-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 24px; }
.foot-grid h3 { margin-bottom: 12px; }
.foot-grid a, .foot-grid p { color: var(--muted); display: block; margin: 6px 0; }
.footer-seo { margin-top: 28px; color: #6f6f6f; font-size: 13px; line-height: 1.8; }
.copy { margin-top: 18px; color: #555; font-size: 12px; }

.dl-hero { padding: 56px 0 24px; }
.dl-hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
.dl-shot { border-radius: 22px; overflow: hidden; border: 1px solid #2a1608; box-shadow: var(--shadow); background: #111; }
.dl-shot img { width: 100%; height: 320px; object-fit: cover; }
.steps { display: grid; gap: 14px; }
.step-card { display: grid; grid-template-columns: 86px 1fr; gap: 16px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px; }
.step-card img { width: 86px; height: 86px; object-fit: cover; border-radius: 12px; }
.anchor { scroll-margin-top: 90px; }

@media (max-width: 980px) {
  .nav-toggle { display: grid; place-items: center; }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 72px;
    background: #000; border-bottom: 1px solid var(--line); padding: 16px; flex-direction: column; align-items: flex-start;
  }
  .site-nav.open { display: flex; }
  .hero-grid, .tech-grid, .dl-hero-grid, .news-grid, .foot-grid { grid-template-columns: 1fr; }
  .plat-grid, .stats-grid, .feature-grid, .review-grid, .trust-grid { grid-template-columns: 1fr 1fr; }
  .fc-a, .fc-b { position: static; margin-top: 10px; display: inline-block; }
}
@media (max-width: 640px) {
  .plat-grid, .stats-grid, .feature-grid, .review-grid, .trust-grid { grid-template-columns: 1fr; }
  .step-card { grid-template-columns: 1fr; }
}