:root {
  --bg: #050510;
  --bg-soft: #0b0b1a;
  --card: rgba(255, 255, 255, 0.04);
  --card-hover: rgba(255, 255, 255, 0.07);
  --line: rgba(255, 255, 255, 0.09);
  --text: #e6edf3;
  --muted: #98a2b3;
  --accent: #22c55e;
  --accent-2: #22d3ee;
  --radius: 18px;
  --maxw: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.no-scroll { overflow: hidden; }
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(60% 45% at 50% 0%, rgba(34, 197, 94, 0.18), transparent 70%),
    radial-gradient(45% 35% at 85% 25%, rgba(34, 211, 238, 0.12), transparent 70%);
  pointer-events: none;
  z-index: -2;
}
#stars { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
a { color: inherit; text-decoration: none; }
.skip {
  position: absolute; left: -9999px; top: 0; padding: 10px 14px;
  background: var(--accent); color: #04120c; border-radius: 0 0 10px 0; z-index: 100;
}
.skip:focus { left: 0; }
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; }

header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(5, 5, 16, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
header.scrolled { border-bottom-color: var(--line); background: rgba(5, 5, 16, 0.88); }
nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { font-weight: 700; letter-spacing: .5px; font-size: 18px; }
.logo span {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nav-links { display: flex; gap: 28px; font-size: 14px; color: var(--muted); }
.nav-links a { position: relative; transition: color .2s ease; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--text); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -7px; height: 2px;
  border-radius: 2px; background: linear-gradient(120deg, var(--accent), var(--accent-2));
}
.nav-toggle {
  display: none; width: 40px; height: 40px; border: 1px solid var(--line);
  border-radius: 10px; background: transparent; color: var(--text); cursor: pointer;
  align-items: center; justify-content: center; font-size: 14px;
}

section { padding: 104px 0; position: relative; scroll-margin-top: 68px; }
.kicker {
  display: inline-block; font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent-2); margin-bottom: 14px;
}
h2 { font-size: clamp(26px, 4vw, 38px); margin: 0 0 16px; letter-spacing: -.5px; }
.lead { color: var(--muted); max-width: 620px; margin: 0; }

.hero { min-height: 100vh; display: flex; align-items: center; padding-top: 68px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--card); font-size: 14px; letter-spacing: 1px; color: var(--muted);
}
.badge i {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
.hero h1 {
  font-size: clamp(52px, 12vw, 104px); line-height: 1.02; margin: 22px 0 18px;
  letter-spacing: -3px; font-weight: 800;
  background: linear-gradient(120deg, #ffffff 25%, #86efac 62%, #67e8f9 96%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub { font-size: clamp(16px, 2.2vw, 20px); color: var(--muted); max-width: 560px; }
.hero .sub b { color: var(--text); font-weight: 600; }
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 34px; }
.tags span {
  padding: 6px 14px; border-radius: 999px; font-size: 13px;
  border: 1px solid var(--line); background: var(--card); color: var(--muted);
}
.actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px;
  border-radius: 999px; font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  font-family: inherit;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-2px); background: var(--card-hover); }
.btn.primary {
  border-color: transparent; color: #04120c;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
}

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; margin-top: 40px; }
.card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  padding: 26px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card); color: inherit; font: inherit; text-align: left;
  transition: transform .25s ease, background .25s ease, border-color .25s ease;
}
a.card, button.card { cursor: pointer; }
.card:hover { transform: translateY(-4px); background: var(--card-hover); border-color: rgba(34, 197, 94, .5); }
.card h3 { margin: 0; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .meta { margin-top: auto; font-size: 13px; color: var(--accent-2); letter-spacing: .5px; }
.num {
  position: absolute; top: 18px; right: 22px; font-size: 13px; color: var(--muted);
  font-variant-numeric: tabular-nums; opacity: .6;
}
.play {
  width: 46px; height: 46px; border-radius: 50%; margin-bottom: 4px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(120deg, var(--accent), var(--accent-2)); color: #04120c;
  font-size: 15px; padding-left: 3px;
}

.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; margin-top: 44px; }
.timeline { list-style: none; margin: 0; padding: 0 0 0 26px; border-left: 1px solid var(--line); }
.timeline li { position: relative; padding: 0 0 28px 8px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -32px; top: 8px; width: 11px; height: 11px;
  border-radius: 50%; background: var(--bg); border: 2px solid var(--accent);
}
.timeline li:last-child::before { border-color: var(--accent-2); box-shadow: 0 0 12px var(--accent-2); }
.timeline b { display: block; font-size: 15px; letter-spacing: .5px; }
.timeline small { color: var(--muted); font-size: 14px; }
.panel {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card); padding: 28px;
}
.panel .panel-title { font-size: 17px; }
.panel .panel-text { color: var(--muted); margin: 12px 0 0; font-size: 15px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 22px; }
.stats div b { display: block; font-size: 26px; letter-spacing: -.5px; }
.stats div small { color: var(--muted); font-size: 13px; }
.quote { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; }
.quote em { color: var(--text); font-style: normal; }

.contact { text-align: center; }
.contact .lead { margin: 0 auto; }
.qr-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px; margin: 34px auto 0; max-width: 660px; text-align: left;
}
.qr-item { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.qr-toggle {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 18px 22px; background: transparent; border: 0; color: var(--text);
  font: inherit; font-size: 15px; cursor: pointer;
}
.qr-toggle:hover { background: var(--card-hover); }
.qr-icon { color: var(--accent-2); font-size: 18px; line-height: 1; transition: transform .25s ease; }
.qr-toggle[aria-expanded="true"] .qr-icon { transform: rotate(45deg); }
.qr-panel { padding: 0 22px 22px; }
.qr-panel img { width: 100%; max-width: 220px; border-radius: 14px; display: block; margin: 0 auto; }
.qr-panel small { display: block; text-align: center; color: var(--muted); font-size: 12.5px; margin-top: 10px; }
.links { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 26px; }
.links a {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--card);
  font-size: 14px; transition: transform .2s ease, border-color .2s ease;
}
.links a:hover { transform: translateY(-2px); border-color: rgba(34, 197, 94, .6); }

.modal { position: fixed; inset: 0; z-index: 80; display: flex; align-items: center; justify-content: center; padding: 24px; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(3, 3, 10, .78); backdrop-filter: blur(6px); }
.modal-panel {
  position: relative; width: 100%; max-width: 860px; padding: 18px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-soft); box-shadow: 0 30px 80px rgba(0, 0, 0, .55);
}
.modal-panel video { width: 100%; display: block; border-radius: 12px; background: #000; aspect-ratio: 16 / 9; }
.modal-close {
  position: absolute; top: -14px; right: -6px; width: 38px; height: 38px;
  border-radius: 50%; border: 1px solid var(--line); background: var(--bg-soft);
  color: var(--text); font: inherit; font-size: 14px; cursor: pointer;
}
.modal-hint { color: var(--muted); font-size: 14px; margin: 14px 4px 2px; }
.modal-hint[hidden] { display: none; }

footer {
  border-top: 1px solid var(--line); padding: 34px 0; color: var(--muted);
  font-size: 13px; text-align: center;
}
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  section { padding: 84px 0; }
}
@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: rgba(5, 5, 16, .97); border-bottom: 1px solid var(--line);
    padding: 8px 24px 18px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .nav-links a.active::after { display: none; }
  .stats { grid-template-columns: 1fr 1fr; }
  .hero h1 { letter-spacing: -2px; }
  .modal-close { top: 6px; right: 6px; }
}

.plan-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin-top: 40px; }
.plan {
  position: relative; display: flex; flex-direction: column; gap: 12px;
  padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card);
}
.plan.featured { border-color: rgba(34, 197, 94, .55); background: rgba(34, 197, 94, .06); }
.plan .tag {
  position: absolute; top: 18px; right: 20px; font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 999px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2)); color: #04120c;
}
.plan h3 { margin: 0; font-size: 19px; }
.plan .price { font-size: 30px; font-weight: 700; letter-spacing: -.5px; }
.plan .price small { font-size: 13px; color: var(--muted); font-weight: 400; margin-left: 6px; }
.plan ul { list-style: none; margin: 4px 0 0; padding: 0; color: var(--muted); font-size: 14.5px; }
.plan ul li { position: relative; padding: 6px 0 6px 20px; }
.plan ul li::before {
  content: ""; position: absolute; left: 2px; top: 14px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
}
.plan .btn { margin-top: auto; justify-content: center; }
.faq { display: grid; gap: 12px; margin-top: 44px; }
.faq details { border: 1px solid var(--line); border-radius: 14px; background: var(--card); padding: 16px 20px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 10px 0 0; font-size: 14.5px; }

.article { max-width: 780px; margin: 0 auto; padding: 132px 24px 72px; }
.article .back { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--muted); margin-bottom: 22px; }
.article .back:hover { color: var(--text); }
.article h1 { font-size: clamp(28px, 4.4vw, 40px); margin: 10px 0 14px; letter-spacing: -.5px; }
.article h2 { font-size: 21px; margin: 42px 0 12px; }
.article h3 { font-size: 17px; margin: 26px 0 8px; }
.article p, .article li { color: #c9d4e2; font-size: 15.5px; }
.article ul, .article ol { padding-left: 22px; }
.article li { margin: 6px 0; }
.article .note {
  border: 1px solid rgba(34, 197, 94, .4); background: rgba(34, 197, 94, .07);
  border-radius: 14px; padding: 16px 20px; margin: 26px 0; color: var(--text); font-size: 15px;
}
.article .term { border-left: 2px solid var(--accent); padding: 2px 0 2px 16px; margin: 22px 0; }
.article .term b { display: block; font-size: 16px; }
.article .term span { color: var(--muted); font-size: 14.5px; }
.article .cta {
  margin-top: 46px; padding: 22px 24px; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--card);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px;
}
.article .cta p { margin: 0; color: var(--muted); font-size: 14.5px; }
.article table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14.5px; }
.article th, .article td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; color: #c9d4e2; }
.article th { background: var(--card); color: var(--text); }