:root {
  --primary: rgb(70,139,223);
  --primary-dark: #1f5ea9;
  --primary-soft: #eaf4ff;
  --ink: #0f2742;
  --muted: #60748a;
  --line: rgba(70,139,223,.16);
  --white: #ffffff;
  --shadow: 0 12px 36px rgba(30, 85, 145, .10);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(70,139,223,.18), transparent 30%),
    linear-gradient(180deg, #f2f8ff 0%, #ffffff 45%, #f7fbff 100%);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 12px 16px 10px;
  background: rgba(246, 250, 255, .88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(70,139,223,.10);
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  letter-spacing: .2px;
  color: #12395f;
}
.logo { width: 34px; height: 34px; border-radius: 12px; box-shadow: 0 8px 18px rgba(70,139,223,.20); }
.mobile-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 0 0;
  scrollbar-width: none;
}
.mobile-nav::-webkit-scrollbar { display: none; }
.mobile-nav a {
  flex: 0 0 auto;
  padding: 7px 12px;
  border-radius: 999px;
  color: #416075;
  background: rgba(255,255,255,.70);
  border: 1px solid rgba(70,139,223,.12);
  font-size: 13px;
  line-height: 1.2;
}
.mobile-nav a.active,
.mobile-nav a:hover {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 8px 22px rgba(70,139,223,.22);
}
.site-main { padding-bottom: 32px; }
.section { padding: 22px 16px; }
.section-tight { padding-top: 10px; }
.hero {
  padding: 22px 16px 30px;
  overflow: hidden;
}
.hero-shell {
  position: relative;
  border-radius: 30px;
  padding: 24px 18px;
  background: linear-gradient(145deg, rgba(255,255,255,.94), rgba(230,243,255,.92));
  box-shadow: var(--shadow);
  border: 1px solid rgba(70,139,223,.14);
}
.hero-shell:before {
  content: "";
  position: absolute;
  inset: auto -70px -90px auto;
  width: 210px;
  height: 210px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(70,139,223,.22), rgba(70,139,223,0) 68%);
}
.eyebrow,
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: rgba(70,139,223,.10);
  border: 1px solid rgba(70,139,223,.14);
  font-size: 12px;
  font-weight: 700;
}
h1, h2, h3 { margin: 0; color: #102a43; line-height: 1.24; }
h1 { font-size: 30px; letter-spacing: -1px; margin-top: 14px; }
h2 { font-size: 22px; margin-bottom: 12px; }
h3 { font-size: 17px; margin-bottom: 7px; }
p { margin: 0 0 12px; color: var(--muted); }
.hero-desc { font-size: 15px; margin: 14px 0 18px; color: #435b75; }
.hero-tags, .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid rgba(70,139,223,.13);
  color: #385878;
  font-size: 12px;
  box-shadow: 0 6px 16px rgba(20,80,140,.05);
}
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  color: #fff;
  background: var(--primary);
  font-size: 15px;
  font-weight: 800;
  box-shadow: 0 12px 24px rgba(70,139,223,.28);
  border: 0;
  transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:active { transform: translateY(1px); box-shadow: 0 8px 18px rgba(70,139,223,.22); }
.hero-visual {
  position: relative;
  margin-top: 20px;
  padding: 12px;
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(255,255,255,.78), rgba(234,244,255,.78));
  border: 1px solid rgba(70,139,223,.13);
}
.hero-visual img { margin: 0 auto; width: min(260px, 82vw); filter: drop-shadow(0 22px 32px rgba(23,73,125,.18)); }
.float-card {
  position: absolute;
  right: 12px;
  bottom: 18px;
  padding: 10px 12px;
  border-radius: 18px;
  background: rgba(255,255,255,.92);
  border: 1px solid rgba(70,139,223,.12);
  box-shadow: 0 12px 22px rgba(30,82,140,.12);
  font-size: 12px;
  color: #33516c;
}
.card {
  padding: 18px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.88);
  border: 1px solid rgba(70,139,223,.12);
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 12px; }
.soft-card { background: linear-gradient(180deg, #ffffff, #f2f8ff); }
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.feature-card {
  padding: 16px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid rgba(70,139,223,.12);
  box-shadow: 0 10px 28px rgba(20,80,140,.07);
}
.icon-dot {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  margin-bottom: 10px;
  color: #fff;
  background: var(--primary);
  font-weight: 900;
  box-shadow: 0 10px 18px rgba(70,139,223,.22);
}
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 14px;
}
.stat {
  padding: 12px 8px;
  border-radius: 18px;
  background: rgba(70,139,223,.08);
  text-align: center;
  border: 1px solid rgba(70,139,223,.10);
}
.stat strong { display: block; font-size: 18px; color: var(--primary-dark); line-height: 1.2; }
.stat span { font-size: 11px; color: #60748a; }
.steps {
  counter-reset: step;
  display: grid;
  gap: 10px;
}
.step {
  position: relative;
  padding: 15px 15px 15px 54px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid rgba(70,139,223,.12);
}
.step:before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 15px;
  top: 16px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #fff;
  background: var(--primary);
  font-weight: 800;
}
.notice {
  padding: 16px;
  border-radius: 20px;
  background: rgba(70,139,223,.09);
  border: 1px solid rgba(70,139,223,.16);
  color: #315878;
}
.notice strong { color: var(--primary-dark); }
.faq-list { display: grid; gap: 10px; }
.faq-item {
  padding: 16px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid rgba(70,139,223,.12);
  box-shadow: 0 8px 24px rgba(20,80,140,.06);
}
.faq-item h3 { font-size: 16px; }
.cta-panel {
  padding: 22px 18px;
  border-radius: 26px;
  background: linear-gradient(135deg, var(--primary), #7bb9ff);
  color: #fff;
  box-shadow: 0 18px 38px rgba(70,139,223,.24);
}
.cta-panel h2, .cta-panel p { color: #fff; }
.cta-panel .download-btn { background: #fff; color: var(--primary-dark); box-shadow: none; }
.link-list { display: grid; gap: 10px; margin-top: 12px; }
.link-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 14px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid rgba(70,139,223,.12);
  color: #294d6e;
}
.link-list a:after { content: "›"; color: var(--primary); font-size: 20px; line-height: 1; }
.site-footer {
  padding: 26px 16px 34px;
  background: rgba(255,255,255,.72);
  border-top: 1px solid rgba(70,139,223,.10);
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-logo { width: 40px; height: 40px; border-radius: 14px; }
.footer-brand strong { color: #12395f; }
.footer-brand p, .footer-note, .copyright { font-size: 12px; color: #6d8093; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0; }
.footer-links a { padding: 7px 10px; border-radius: 999px; background: rgba(70,139,223,.08); color: #315a80; font-size: 12px; }
.desktop-gate { display: none; }
.gate-logo { width: 46px; height: 46px; border-radius: 16px; margin: 0 auto 12px; }
@media (min-width: 760px) {
  body.desktop-view {
    min-height: 100vh;
    background: linear-gradient(180deg, #f2f8ff, #ffffff);
  }
  body.desktop-view .desktop-gate {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    padding: 28px;
  }
  .desktop-gate-card {
    width: min(420px, 92vw);
    padding: 30px 24px;
    border-radius: 28px;
    text-align: center;
    background: #fff;
    border: 1px solid rgba(70,139,223,.14);
    box-shadow: var(--shadow);
  }
  .desktop-gate-card strong { display: block; font-size: 24px; color: #102a43; margin-bottom: 8px; }
  body.desktop-view .site-header,
  body.desktop-view .site-main,
  body.desktop-view .site-footer {
    position: absolute;
    left: -9999px;
    width: 390px;
    overflow: hidden;
  }
  body.desktop-view .download-btn { display: none !important; }
}