:root {
  --ink: #13213d;
  --muted: #52617d;
  --line: rgba(48, 64, 105, .14);
  --surface: rgba(255, 255, 255, .72);
  --white: #fff;
  --blue: #315eea;
  --violet: #7048e8;
  --teal: #0f9e96;
  --shadow: 0 24px 70px rgba(54, 70, 118, .13);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 12%, rgba(104, 164, 255, .34), transparent 31%),
    radial-gradient(circle at 89% 8%, rgba(199, 147, 255, .3), transparent 31%),
    radial-gradient(circle at 82% 76%, rgba(99, 223, 191, .24), transparent 34%),
    radial-gradient(circle at 18% 88%, rgba(255, 194, 140, .23), transparent 30%),
    #f7f8ff;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  line-height: 1.72;
  min-height: 100vh;
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: .2;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
}
a { color: inherit; }
img { max-width: 100%; display: block; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid #ff9e52; outline-offset: 4px; }
.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 100;
  padding: 10px 16px; background: var(--ink); color: #fff;
  border-radius: 10px; transform: translateY(-180%);
}
.skip-link:focus { transform: none; }
.container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid rgba(255,255,255,.65);
  background: rgba(247,248,255,.78);
  backdrop-filter: blur(18px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 900; letter-spacing: -.03em; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { text-decoration: none; font-weight: 700; font-size: .94rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--blue); }
.nav-toggle { display: none; border: 0; background: transparent; font-size: 1.6rem; color: var(--ink); cursor: pointer; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px; border: 0; border-radius: 999px;
  text-decoration: none; font-weight: 800; color: #fff;
  background: linear-gradient(115deg, var(--blue), var(--violet));
  box-shadow: 0 12px 30px rgba(67, 78, 210, .25);
  transition: transform .2s ease, box-shadow .2s ease;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(67, 78, 210, .32); }
.button.secondary { color: var(--ink); background: rgba(255,255,255,.76); border: 1px solid var(--line); box-shadow: none; }
.button.small { min-height: 40px; padding-inline: 17px; font-size: .9rem; }
.hero { padding: 96px 0 70px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 58px; }
.eyebrow {
  display: inline-flex; padding: 7px 13px; border: 1px solid rgba(49,94,234,.2);
  border-radius: 999px; color: #254bbd; background: rgba(255,255,255,.58);
  font-size: .86rem; font-weight: 800;
}
h1, h2, h3 { margin-top: 0; line-height: 1.15; letter-spacing: -.04em; }
h1 { margin-bottom: 24px; font-size: clamp(3rem, 7vw, 5.8rem); }
h2 { margin-bottom: 18px; font-size: clamp(2rem, 4.4vw, 3.35rem); }
h3 { margin-bottom: 10px; font-size: 1.25rem; }
.gradient-text {
  color: transparent;
  background: linear-gradient(110deg, #1e56d7 8%, #7949d8 49%, #0b968e 88%);
  -webkit-background-clip: text; background-clip: text;
}
.lead { margin: 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.2rem); }
.actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 30px; }
.hero-art {
  position: relative; padding: 18px; border: 1px solid rgba(255,255,255,.9);
  border-radius: 34px; background: rgba(255,255,255,.5); box-shadow: var(--shadow);
}
.hero-art::before, .hero-art::after {
  position: absolute; z-index: -1; content: ""; border-radius: 50%; filter: blur(8px);
}
.hero-art::before { width: 170px; height: 170px; top: -50px; right: -40px; background: rgba(122,77,227,.24); }
.hero-art::after { width: 140px; height: 140px; bottom: -40px; left: -40px; background: rgba(19,183,165,.2); }
.hero-art img { width: 880px; aspect-ratio: 44 / 35; object-fit: cover; border-radius: 21px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; }
.stat { padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.57); }
.stat strong { display: block; font-size: 1.02rem; }
.stat span { color: var(--muted); font-size: .84rem; }
.section { padding: 82px 0; }
.section-head { max-width: 760px; margin-bottom: 36px; }
.section-head p, .card p, .prose p, .faq p { color: var(--muted); }
.grid { display: grid; gap: 20px; }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.card {
  position: relative; overflow: hidden; padding: 28px;
  border: 1px solid rgba(255,255,255,.86); border-radius: var(--radius);
  background: var(--surface); box-shadow: 0 14px 42px rgba(56,72,120,.08);
}
.card::after {
  position: absolute; width: 120px; height: 120px; right: -50px; bottom: -55px;
  content: ""; border-radius: 50%; background: radial-gradient(circle, rgba(113,80,230,.16), transparent 67%);
}
.icon {
  width: 46px; height: 46px; display: grid; place-items: center; margin-bottom: 18px;
  border-radius: 15px; color: #fff; background: linear-gradient(145deg, var(--blue), var(--violet));
  font-size: 1.28rem; font-weight: 900;
}
.link-card { display: block; text-decoration: none; transition: transform .2s ease; }
.link-card:hover { transform: translateY(-4px); }
.detail {
  display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: center;
  padding: 38px; border: 1px solid rgba(255,255,255,.86); border-radius: 34px;
  background: rgba(255,255,255,.57); box-shadow: var(--shadow);
}
.detail.reverse { grid-template-columns: 1.1fr .9fr; }
.detail.reverse .detail-visual { order: 2; }
.detail-visual { min-height: 280px; display: grid; place-items: center; border-radius: 26px; background:
  radial-gradient(circle at 30% 25%, rgba(255,255,255,.88), transparent 22%),
  linear-gradient(135deg, rgba(66,125,240,.8), rgba(120,76,220,.64) 52%, rgba(40,188,164,.58)); }
.detail-visual img { width: 210px; height: 210px; object-fit: contain; filter: drop-shadow(0 22px 22px rgba(16,35,77,.2)); }
.check-list { padding: 0; list-style: none; }
.check-list li { position: relative; padding: 8px 0 8px 28px; color: var(--muted); }
.check-list li::before { position: absolute; left: 0; content: "✓"; color: var(--teal); font-weight: 900; }
.platform { text-align: center; }
.platform .icon { margin-inline: auto; }
.faq-list { display: grid; gap: 12px; }
.faq { border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.68); }
.faq summary { cursor: pointer; padding: 18px 22px; font-weight: 850; }
.faq p { margin: 0; padding: 0 22px 20px; }
.cta {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 32px;
  padding: 46px; color: #fff; border-radius: 34px;
  background: linear-gradient(115deg, #224ec5, #7144d6 55%, #108c87);
  box-shadow: 0 24px 60px rgba(60,62,171,.27);
}
.cta p { margin: 0; color: rgba(255,255,255,.82); }
.cta .button { color: var(--ink); background: #fff; box-shadow: none; }
.page-hero { padding: 76px 0 48px; text-align: center; }
.page-hero .lead { max-width: 760px; margin-inline: auto; }
.page-hero h1 { font-size: clamp(2.7rem, 6vw, 4.7rem); }
.steps { counter-reset: step; display: grid; gap: 18px; }
.step { counter-increment: step; display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 25px; }
.step::before {
  content: counter(step, decimal-leading-zero); width: 52px; height: 52px; display: grid; place-items: center;
  border-radius: 17px; color: #fff; font-weight: 900; background: linear-gradient(135deg,var(--blue),var(--violet));
}
.notice { padding: 20px 24px; border-left: 4px solid var(--teal); border-radius: 12px 20px 20px 12px; background: rgba(255,255,255,.65); color: var(--muted); }
.architecture { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; align-items: center; }
.architecture div { padding: 22px 12px; text-align: center; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.74); font-weight: 800; }
.architecture span { text-align: center; color: var(--violet); font-weight: 900; }
.site-footer { margin-top: 72px; padding: 60px 0 26px; color: #eaf0ff; background: #111c38; }
.footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 40px; }
.site-footer h3 { font-size: 1rem; letter-spacing: 0; }
.site-footer p, .site-footer a { color: #b9c5df; }
.footer-links { display: grid; gap: 9px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: #fff; }
.copyright { margin-top: 40px; padding-top: 23px; border-top: 1px solid rgba(255,255,255,.12); color: #94a2bf; font-size: .86rem; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 76px; left: 20px; right: 20px;
    padding: 20px; align-items: stretch; flex-direction: column; border: 1px solid var(--line);
    border-radius: 20px; background: rgba(255,255,255,.96); box-shadow: var(--shadow);
  }
  .nav.open { display: flex; }
  .hero-grid, .detail, .detail.reverse { grid-template-columns: 1fr; }
  .detail.reverse .detail-visual { order: 0; }
  .grid.four { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 620px) {
  .container { width: min(100% - 28px, 1160px); }
  .hero { padding-top: 58px; }
  h1 { font-size: 2.72rem; }
  .stats, .grid.four, .grid.three, .grid.two, .architecture { grid-template-columns: 1fr; }
  .architecture span { transform: rotate(90deg); }
  .detail, .cta { padding: 26px; }
  .cta { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav .button { width: 100%; }
}

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