:root {
  --primary: rgb(70,139,223);
  --primary-dark: #1f5fae;
  --primary-soft: #eaf4ff;
  --ink: #102033;
  --muted: #61738b;
  --line: #dbe8f7;
  --bg: #f7fbff;
  --card: rgba(255,255,255,.92);
  --shadow: 0 18px 55px rgba(30, 84, 144, .10);
  --radius-lg: 28px;
  --radius-md: 22px;
  --radius-sm: 16px;
  --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  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,.16), transparent 34rem),
    linear-gradient(180deg, #ffffff 0%, #f4f9ff 42%, #ffffff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { color: var(--muted); margin: 0 0 1rem; }
h1, h2, h3 { margin: 0; line-height: 1.16; color: var(--ink); letter-spacing: -.03em; }
h1 { font-size: clamp(2.15rem, 8vw, 5rem); }
h2 { font-size: clamp(1.55rem, 4vw, 2.7rem); }
h3 { font-size: 1.12rem; }
section { padding: 3.4rem 1rem; }
.container { width: min(100% - 2rem, var(--container)); margin: 0 auto; }
.narrow { width: min(100% - 2rem, 860px); margin: 0 auto; }
.center { text-align: center; }
.eyebrow, .badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--primary-dark);
  background: rgba(70,139,223,.1);
  border: 1px solid rgba(70,139,223,.16);
  padding: .36rem .72rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.section-head { display: grid; gap: .85rem; margin-bottom: 1.5rem; }
.section-head.center { justify-items: center; }
.section-head p { max-width: 720px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(255,255,255,.82);
  border-bottom: 1px solid rgba(219,232,247,.78);
}
.nav-wrap {
  width: min(100% - 2rem, var(--container));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .78rem 0;
  gap: 1rem;
}
.brand { display: inline-flex; align-items: center; gap: .62rem; font-weight: 800; letter-spacing: -.02em; }
.brand-logo { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 8px 22px rgba(70,139,223,.16); }
.brand-text { font-size: 1.05rem; }
.nav-toggle {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: .58rem .8rem;
  border-radius: 999px;
  font-weight: 700;
}
.site-nav {
  position: absolute;
  left: 1rem;
  right: 1rem;
  top: 4.15rem;
  display: none;
  flex-direction: column;
  gap: .2rem;
  padding: .8rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow);
}
.site-nav.open { display: flex; }
.site-nav a {
  padding: .72rem .9rem;
  border-radius: 14px;
  color: var(--muted);
  font-weight: 700;
  font-size: .94rem;
}
.site-nav a:hover, .site-nav a.active { color: var(--primary-dark); background: var(--primary-soft); }

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .84rem 1.28rem;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 32px rgba(70,139,223,.24);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 36px rgba(70,139,223,.29); }

.centered-hero {
  padding: 5.1rem 1rem 2.4rem;
  text-align: center;
}
.hero-inner { width: min(100%, 900px); margin: 0 auto; display: grid; justify-items: center; gap: 1.05rem; }
.hero-copy { max-width: 760px; font-size: 1.05rem; }
.trust-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: .65rem; margin-top: .35rem; }
.trust-tags span, .tag {
  display: inline-flex;
  align-items: center;
  padding: .46rem .7rem;
  border-radius: 999px;
  background: rgba(255,255,255,.78);
  border: 1px solid var(--line);
  color: #435771;
  font-size: .86rem;
  font-weight: 700;
}
.gradient-panel {
  background: linear-gradient(145deg, rgba(70,139,223,.12), rgba(255,255,255,.9) 58%, rgba(231,244,255,.9));
  border: 1px solid rgba(70,139,223,.14);
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  box-shadow: 0 14px 45px rgba(29,76,130,.06);
}
.card p:last-child { margin-bottom: 0; }

.product-bento {
  width: min(100% - 2rem, 1080px);
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}
.product-showcase {
  position: relative;
  overflow: hidden;
  min-height: 380px;
  display: grid;
  place-items: center;
  padding: 1.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(70,139,223,.16);
  background:
    radial-gradient(circle at 20% 0%, rgba(70,139,223,.22), transparent 26rem),
    linear-gradient(145deg, #ffffff, #edf7ff);
  box-shadow: var(--shadow);
}
.product-showcase img { width: min(260px, 72vw); border-radius: 32px; filter: drop-shadow(0 24px 45px rgba(34,72,112,.18)); }
.status-stack { display: grid; gap: 1rem; }
.status-card { min-height: 112px; }
.status-label { display: block; color: var(--primary-dark); font-size: .78rem; font-weight: 800; margin-bottom: .25rem; }
.status-value { font-size: 1.04rem; color: var(--ink); font-weight: 800; }
.status-card p { font-size: .93rem; margin-top: .45rem; }

.capability-grid, .scenario-grid, .faq-grid, .guide-grid {
  display: grid;
  gap: 1rem;
}
.capability-card, .scenario-card, .faq-item, .guide-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  box-shadow: 0 12px 34px rgba(30,84,144,.055);
}
.capability-card .icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: .78rem;
  color: var(--primary-dark);
  background: var(--primary-soft);
  font-weight: 900;
}

.roadmap {
  display: grid;
  gap: 1rem;
  counter-reset: road;
}
.road-step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.1rem 1.1rem 4.4rem;
  box-shadow: 0 10px 28px rgba(30,84,144,.05);
}
.road-step::before {
  counter-increment: road;
  content: counter(road, decimal-leading-zero);
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 2.45rem;
  height: 2.45rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  font-size: .86rem;
}
.card-link {
  display: inline-flex;
  margin-top: .55rem;
  color: var(--primary-dark);
  font-weight: 800;
}

.category-bento, .bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.category-card, .bento-card {
  background: rgba(255,255,255,.92);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  min-height: 158px;
  box-shadow: 0 15px 42px rgba(30,84,144,.055);
}
.category-card strong, .bento-card strong { display: block; font-size: 1.15rem; margin-bottom: .5rem; letter-spacing: -.02em; }
.category-card.featured, .bento-card.large { background: linear-gradient(145deg, #fff, #edf6ff); }
.bento-card.small { min-height: 128px; }

.security-layout {
  display: grid;
  gap: 1rem;
  align-items: start;
}
.security-panel {
  background: linear-gradient(145deg, rgba(70,139,223,.12), rgba(255,255,255,.94));
  border: 1px solid rgba(70,139,223,.16);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.principle-list { display: grid; gap: .8rem; padding: 0; margin: 1rem 0 0; list-style: none; }
.principle-list li {
  background: rgba(255,255,255,.88);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: .85rem;
  color: #40536b;
}

.cta-section { padding-bottom: 5rem; }
.cta-card {
  width: min(100% - 2rem, 960px);
  margin: 0 auto;
  text-align: center;
  border-radius: 32px;
  padding: 2rem 1.2rem;
  border: 1px solid rgba(70,139,223,.16);
  background: linear-gradient(135deg, rgba(70,139,223,.14), rgba(255,255,255,.96) 62%, rgba(239,248,255,.98));
  box-shadow: var(--shadow);
}
.cta-card p { max-width: 680px; margin: .8rem auto 1.2rem; }

.page-hero, .doc-hero {
  padding: 4rem 1rem 2.4rem;
}
.page-hero .narrow, .doc-hero .narrow { display: grid; gap: 1rem; }
.page-summary { font-size: 1.03rem; }
.doc-layout {
  width: min(100% - 2rem, 1080px);
  margin: 0 auto;
  display: grid;
  gap: 1rem;
  align-items: start;
}
.doc-main {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: 0 16px 44px rgba(30,84,144,.055);
}
.doc-main h2 { font-size: 1.35rem; margin: 1.4rem 0 .7rem; }
.doc-main h2:first-child { margin-top: 0; }
.doc-side { display: grid; gap: 1rem; }
.tip-card, .check-card, .mini-card {
  border: 1px solid var(--line);
  background: rgba(255,255,255,.92);
  border-radius: var(--radius-md);
  padding: 1.05rem;
  box-shadow: 0 12px 32px rgba(30,84,144,.045);
}
.check-list, .number-list { padding-left: 1.1rem; margin: .6rem 0 0; color: var(--muted); }
.check-list li, .number-list li { margin: .45rem 0; }
.process-steps { display: grid; gap: .8rem; margin: 1rem 0; }
.process-step {
  border: 1px solid var(--line);
  background: var(--primary-soft);
  border-radius: 18px;
  padding: .95rem;
}
.download-row { margin-top: 1.4rem; }

.faq-list { display: grid; gap: 1rem; }
.faq-item h3 { margin-bottom: .45rem; }
details.faq-item summary { cursor: pointer; font-weight: 800; color: var(--ink); }
details.faq-item p { margin-top: .7rem; }

.download-steps {
  display: grid;
  gap: .8rem;
  margin: 1.2rem 0;
}
.download-step {
  display: flex;
  gap: .8rem;
  align-items: flex-start;
  padding: .95rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
}
.download-step span {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,.8);
  padding: 2rem 1rem;
}
.footer-inner {
  width: min(100% - 2rem, var(--container));
  margin: 0 auto;
  display: grid;
  gap: 1.2rem;
}
.footer-brand { font-weight: 900; font-size: 1.2rem; margin-bottom: .35rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .6rem; }
.footer-links a {
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .44rem .72rem;
  background: #fff;
  font-weight: 700;
}

@media (min-width: 700px) {
  section { padding: 4.5rem 1rem; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid, .faq-grid, .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .category-bento { grid-template-columns: repeat(2, 1fr); }
  .bento-grid { grid-template-columns: repeat(2, 1fr); }
  .product-bento { grid-template-columns: 1.4fr .9fr; align-items: stretch; }
}

@media (min-width: 980px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex !important;
    flex-direction: row;
    align-items: center;
    gap: .18rem;
    padding: .25rem;
    border: 1px solid rgba(219,232,247,.75);
    border-radius: 999px;
    box-shadow: none;
    background: rgba(255,255,255,.75);
  }
  .site-nav a { padding: .56rem .82rem; font-size: .9rem; }
  .centered-hero { padding-top: 7rem; }
  .product-showcase { min-height: 560px; }
  .product-showcase img { width: 315px; }
  .capability-grid { grid-template-columns: repeat(4, 1fr); }
  .roadmap { grid-template-columns: repeat(3, 1fr); }
  .road-step:nth-child(2), .road-step:nth-child(5) { transform: translateY(1.1rem); }
  .category-bento { grid-template-columns: repeat(4, 1fr); }
  .category-card.featured { grid-column: span 2; min-height: 210px; }
  .bento-grid { grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(150px, auto); }
  .bento-card.large { grid-column: span 2; grid-row: span 2; }
  .bento-card.medium { grid-column: span 2; }
  .security-layout { grid-template-columns: 1.08fr .92fr; gap: 1.4rem; }
  .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; }
  .doc-main { padding: 1.6rem; }
  .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
}