:root {
  --primary: rgb(70,139,223);
  --primary-dark: #1f65bf;
  --primary-soft: #edf5ff;
  --primary-tint: #f6fbff;
  --text: #132238;
  --muted: #637083;
  --line: #dce8f5;
  --card: rgba(255,255,255,0.88);
  --shadow: 0 18px 48px rgba(45, 96, 160, 0.10);
  --radius: 22px;
  --radius-lg: 28px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f7fbff 0%, #ffffff 34%, #f7fbff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(255,255,255,0.86);
  border-bottom: 1px solid rgba(220,232,245,0.8);
}
.nav-wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: #10233e; letter-spacing: -0.01em; }
.logo { width: 34px; height: 34px; border-radius: 10px; }
.nav-toggle { display: none; }
.nav-toggle-label { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 14px; display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; background: #fff; }
.nav-toggle-label span { width: 18px; height: 2px; background: #20344d; border-radius: 2px; }
.site-nav { display: none; position: absolute; left: 16px; right: 16px; top: 70px; background: rgba(255,255,255,0.97); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); padding: 12px; }
.site-nav a { display: block; padding: 12px 14px; border-radius: 14px; color: #33445c; font-size: 15px; }
.site-nav a.active, .site-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }
.nav-toggle:checked ~ .site-nav { display: block; }
.container { width: min(1120px, calc(100% - 36px)); margin: 0 auto; }
.narrow { width: min(880px, calc(100% - 36px)); margin: 0 auto; }
.section { padding: 56px 0; }
.section-head { margin-bottom: 24px; }
.section-label, .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--primary-soft);
  border: 1px solid rgba(70,139,223,0.18);
  font-size: 13px;
  font-weight: 700;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 14px; letter-spacing: -0.035em; }
h1 { font-size: clamp(34px, 8vw, 68px); }
h2 { font-size: clamp(28px, 5vw, 44px); }
h3 { font-size: 20px; }
p { margin: 0 0 14px; color: var(--muted); }
.centered-hero { padding: 82px 0 38px; text-align: center; position: relative; overflow: hidden; }
.centered-hero:before {
  content: "";
  position: absolute;
  inset: -180px 16% auto;
  height: 360px;
  background: radial-gradient(circle, rgba(70,139,223,0.20), rgba(70,139,223,0));
  pointer-events: none;
}
.hero-inner { position: relative; width: min(900px, calc(100% - 36px)); margin: 0 auto; }
.hero-inner p { font-size: 17px; max-width: 720px; margin: 0 auto 22px; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 26px rgba(70,139,223,0.25);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 34px rgba(70,139,223,0.31); }
.hero-tags { margin-top: 18px; display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.hero-tags span, .soft-tag { color: #38536f; background: rgba(255,255,255,0.9); border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; font-size: 13px; box-shadow: 0 8px 22px rgba(50,80,120,0.06); }
.product-bento { padding: 24px 0 62px; }
.product-stage { width: min(1080px, calc(100% - 36px)); margin: 0 auto; display: grid; gap: 16px; }
.product-card, .status-card, .card, .faq-item, .doc-card, .principle-card, .scenario-card, .category-card, .feature-card, .step-card {
  background: var(--card);
  border: 1px solid rgba(220,232,245,0.95);
  border-radius: var(--radius);
  box-shadow: 0 12px 38px rgba(50,92,140,0.08);
}
.product-card { padding: 24px; position: relative; overflow: hidden; background: linear-gradient(145deg, #ffffff, #f3f8ff); }
.product-card:before { content: ""; position: absolute; right: -80px; top: -80px; width: 230px; height: 230px; border-radius: 50%; background: rgba(70,139,223,0.13); }
.app-visual { position: relative; z-index: 1; display: grid; place-items: center; min-height: 380px; }
.app-visual img { width: min(310px, 86%); filter: drop-shadow(0 28px 44px rgba(41,81,125,0.22)); }
.status-grid { display: grid; gap: 14px; }
.status-card { padding: 18px; }
.status-card strong { display: block; margin-bottom: 4px; color: #172844; }
.status-card small { color: var(--muted); }
.capability-grid, .scenario-grid { display: grid; gap: 16px; }
.card, .scenario-card { padding: 22px; }
.card-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 14px; background: var(--primary-soft); color: var(--primary-dark); font-weight: 900; margin-bottom: 14px; }
.roadmap { display: grid; gap: 16px; counter-reset: step; }
.step-card { padding: 20px; position: relative; overflow: hidden; }
.step-card .num { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 900; margin-bottom: 12px; }
.inline-link { color: var(--primary-dark); font-weight: 800; border-bottom: 1px solid rgba(70,139,223,0.35); }
.category-bento, .bento-grid { display: grid; gap: 16px; }
.category-card, .feature-card { padding: 24px; position: relative; overflow: hidden; min-height: 160px; }
.category-card:after, .feature-card:after { content: ""; position: absolute; right: 18px; bottom: 18px; width: 46px; height: 46px; border-radius: 16px; background: linear-gradient(135deg, rgba(70,139,223,0.14), rgba(70,139,223,0.03)); }
.category-card a, .scenario-card a { color: var(--primary-dark); font-weight: 800; }
.feature-card.large { min-height: 230px; background: linear-gradient(145deg, #ffffff, #f1f7ff); }
.security-layout { display: grid; gap: 20px; align-items: start; }
.security-panel { padding: 24px; border-radius: var(--radius-lg); background: linear-gradient(145deg, #ffffff, #f2f8ff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.principle-list { display: grid; gap: 12px; margin-top: 14px; }
.principle-card { padding: 16px; display: flex; gap: 12px; align-items: flex-start; }
.principle-card span { flex: 0 0 28px; height: 28px; display: grid; place-items: center; border-radius: 10px; color: var(--primary-dark); background: var(--primary-soft); font-weight: 900; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item h3 { font-size: 18px; margin-bottom: 8px; }
.cta-section { margin: 30px auto 70px; width: min(1080px, calc(100% - 36px)); text-align: center; border-radius: 30px; padding: 44px 22px; background: linear-gradient(135deg, #eef6ff, #ffffff 52%, #f6fbff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.cta-section p { max-width: 680px; margin: 0 auto 20px; }
.page-hero { padding: 56px 0 26px; }
.page-hero .narrow { background: linear-gradient(145deg, rgba(255,255,255,0.92), rgba(246,251,255,0.92)); border: 1px solid var(--line); border-radius: 30px; padding: 30px; box-shadow: var(--shadow); }
.doc-layout { display: grid; gap: 20px; align-items: start; }
.article { background: rgba(255,255,255,0.82); border: 1px solid var(--line); border-radius: 26px; padding: 24px; box-shadow: 0 12px 32px rgba(50,92,140,0.07); }
.article h2 { font-size: 26px; margin-top: 10px; }
.article ul, .article ol { color: var(--muted); padding-left: 22px; }
.article li { margin-bottom: 8px; }
.aside { display: grid; gap: 16px; }
.doc-card { padding: 20px; }
.doc-card ul { margin: 8px 0 0; padding-left: 18px; color: var(--muted); }
.process-steps { display: grid; gap: 12px; margin: 20px 0; }
.process-step { border: 1px solid var(--line); background: #fff; border-radius: 18px; padding: 16px; }
.process-step strong { display: block; color: #172844; margin-bottom: 4px; }
.cta-inline { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.warning { background: #fffaf0; border: 1px solid #f4dfae; color: #70571c; border-radius: 18px; padding: 16px; }
.info-strip { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 0; }
.info-strip span { padding: 8px 12px; border-radius: 999px; background: var(--primary-soft); color: var(--primary-dark); font-size: 13px; font-weight: 700; }
.footer-inner { width: min(1120px, calc(100% - 36px)); margin: 0 auto; padding: 36px 0; display: grid; gap: 24px; border-top: 1px solid var(--line); }
.footer-brand { display: flex; gap: 14px; align-items: flex-start; }
.footer-logo { width: 42px; height: 42px; border-radius: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-links a { padding: 8px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--line); color: #43546a; font-size: 14px; }
.footer-bottom { text-align: center; color: #78869a; font-size: 13px; padding: 0 18px 28px; }
.table-like { display: grid; gap: 10px; }
.table-row { display: grid; gap: 6px; padding: 14px; border-radius: 16px; border: 1px solid var(--line); background: #fff; }
.table-row strong { color: #172844; }

@media (min-width: 680px) {
  .capability-grid, .scenario-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .category-bento { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .bento-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .product-stage { grid-template-columns: 1.4fr .9fr; align-items: stretch; }
  .status-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (min-width: 920px) {
  .nav-toggle-label { display: none; }
  .site-nav { display: flex; position: static; background: transparent; border: 0; border-radius: 0; box-shadow: none; padding: 0; align-items: center; gap: 4px; }
  .site-nav a { padding: 9px 12px; font-size: 14px; }
  .centered-hero { padding-top: 112px; }
  .product-stage { grid-template-columns: 1.25fr 0.75fr; }
  .product-card { border-radius: 34px; padding: 34px; }
  .app-visual { min-height: 520px; }
  .status-grid { grid-template-columns: 1fr; align-content: center; }
  .capability-grid { grid-template-columns: repeat(4, minmax(0,1fr)); }
  .roadmap { grid-template-columns: repeat(6, minmax(0,1fr)); gap: 12px; align-items: stretch; }
  .step-card:nth-child(even) { margin-top: 32px; }
  .category-bento { grid-template-columns: repeat(4, minmax(0,1fr)); grid-auto-rows: minmax(150px, auto); }
  .category-card.big { grid-column: span 2; grid-row: span 2; }
  .category-card.wide { grid-column: span 2; }
  .bento-grid { grid-template-columns: repeat(4, minmax(0,1fr)); grid-auto-rows: minmax(160px, auto); }
  .feature-card.large { grid-column: span 2; grid-row: span 2; }
  .feature-card.medium { grid-column: span 2; }
  .security-layout { grid-template-columns: 1fr .9fr; gap: 34px; }
  .scenario-grid { grid-template-columns: repeat(5, minmax(0,1fr)); }
  .scenario-card { min-height: 180px; }
  .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; }
  .article { padding: 34px; }
  .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
}
@media (min-width: 1180px) {
  .container { width: min(1120px, calc(100% - 48px)); }
}