:root {
  --primary: rgb(70,139,223);
  --primary-dark: #235fba;
  --primary-soft: #eef6ff;
  --primary-pale: #f7fbff;
  --ink: #102033;
  --muted: #5f7188;
  --line: #dce9f7;
  --card: rgba(255,255,255,.86);
  --radius: 22px;
  --shadow: 0 18px 48px rgba(25, 74, 132, .10);
}
* { 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,.13), transparent 34rem),
    linear-gradient(180deg, #ffffff 0%, #f7fbff 48%, #ffffff 100%);
  line-height: 1.72;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { margin: 0 0 14px; color: var(--muted); }
h1, h2, h3 { color: var(--ink); line-height: 1.18; margin: 0 0 14px; letter-spacing: -.025em; }
h1 { font-size: clamp(2.1rem, 8vw, 4.8rem); }
h2 { font-size: clamp(1.65rem, 5vw, 3rem); }
h3 { font-size: 1.15rem; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(220,233,247,.78);
}
.header-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand, .footer-brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 10px 22px rgba(70,139,223,.18); }
.brand-text { font-weight: 800; letter-spacing: -.02em; }
.nav-toggle {
  border: 1px solid var(--line);
  background: #fff;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: var(--primary-dark);
  font-size: 1.25rem;
}
.site-nav {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 72px;
  display: none;
  padding: 12px;
  background: rgba(255,255,255,.96);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.site-nav.open { display: grid; gap: 4px; }
.site-nav a {
  padding: 10px 12px;
  border-radius: 12px;
  color: #476178;
  font-size: .96rem;
}
.site-nav a:hover, .site-nav a.active { background: var(--primary-soft); color: var(--primary-dark); }
.section, .page-section { padding: 54px 0; }
.container { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(840px, calc(100% - 32px)); margin: 0 auto; }
.centered-hero { padding: 82px 0 34px; text-align: center; }
.hero-copy { max-width: 780px; margin: 0 auto 24px; font-size: 1.08rem; }
.hero-tags, .tag-row, .mini-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 18px; }
.tag, .badge, .pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(70,139,223,.18);
  color: var(--primary-dark);
  background: rgba(255,255,255,.84);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: .86rem;
  font-weight: 650;
}
.badge { background: var(--primary-soft); margin-bottom: 14px; }
.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 28px rgba(70,139,223,.24);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-1px); background: var(--primary-dark); box-shadow: 0 18px 34px rgba(70,139,223,.28); }
.product-bento {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  margin-top: 18px;
}
.visual-card, .bento-card, .category-card, .ability-card, .scenario-card, .faq-item, .note-card, .doc-card, .step-card, .panel-card {
  background: var(--card);
  border: 1px solid rgba(220,233,247,.92);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.visual-card {
  min-height: 420px;
  padding: 26px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #ffffff, #edf7ff);
  position: relative;
  overflow: hidden;
}
.visual-card:before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(70,139,223,.12);
  filter: blur(8px);
  top: -80px;
  right: -60px;
}
.app-shot { width: min(260px, 72vw); border-radius: 34px; box-shadow: 0 26px 70px rgba(31,83,149,.18); position: relative; z-index: 1; }
.status-stack { display: grid; gap: 16px; }
.status-card { padding: 18px; }
.status-label { display: block; color: var(--primary-dark); font-weight: 800; font-size: .86rem; margin-bottom: 6px; }
.section-title { text-align: center; max-width: 760px; margin: 0 auto 26px; }
.ability-grid, .scenario-grid, .page-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.ability-card, .scenario-card, .category-card, .bento-card, .doc-card, .step-card, .note-card, .panel-card, .faq-item { padding: 22px; }
.card-link { color: var(--primary-dark); font-weight: 800; display: inline-flex; margin-top: 8px; }
.roadmap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  counter-reset: step;
  position: relative;
}
.roadmap-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: start;
  padding: 18px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--line);
}
.step-num {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  font-weight: 850;
  box-shadow: 0 10px 22px rgba(70,139,223,.22);
}
.category-bento, .bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.bento-card.large, .category-card.featured { background: linear-gradient(145deg, #ffffff 0%, #eef7ff 100%); }
.bento-kicker { color: var(--primary-dark); font-weight: 850; font-size: .84rem; margin-bottom: 8px; }
.security-layout { display: grid; grid-template-columns: 1fr; gap: 18px; align-items: center; }
.security-panel { display: grid; gap: 12px; }
.principle { padding: 16px; border-radius: 18px; background: #fff; border: 1px solid var(--line); }
.cta-section {
  text-align: center;
  padding: 46px 24px;
  border-radius: 28px;
  background: linear-gradient(135deg, #eef7ff, #ffffff);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.page-hero { padding: 64px 0 28px; }
.page-hero .narrow { text-align: left; }
.page-summary { font-size: 1.05rem; }
.doc-layout { display: grid; grid-template-columns: 1fr; gap: 20px; align-items: start; }
.doc-main { display: grid; gap: 16px; }
.doc-card ul, .note-card ul, .panel-card ul { margin: 8px 0 0; padding-left: 20px; color: var(--muted); }
.doc-card li, .note-card li, .panel-card li { margin: 8px 0; }
.process-list { display: grid; gap: 12px; margin: 18px 0; }
.process-list .step-card { display: grid; gap: 6px; }
.inline-number { color: var(--primary-dark); font-weight: 900; }
.faq-list { display: grid; gap: 14px; }
.faq-item summary { cursor: pointer; font-weight: 850; color: var(--ink); }
.faq-item p { margin-top: 12px; }
.footer-inner {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  border-top: 1px solid var(--line);
}
.footer-logo { width: 42px; height: 42px; border-radius: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-links a { padding: 9px 12px; background: var(--primary-soft); color: var(--primary-dark); border-radius: 999px; font-weight: 700; }
.footer-bottom { text-align: center; color: #7a8b9f; font-size: .88rem; padding: 0 16px 28px; }
@media (min-width: 720px) {
  .section, .page-section { padding: 72px 0; }
  .ability-grid, .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .category-bento { grid-template-columns: repeat(2, 1fr); }
  .page-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1.2fr .8fr; align-items: center; }
  .footer-links { justify-content: flex-end; }
}
@media (min-width: 980px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0;
    border: 0;
    background: transparent;
    box-shadow: none;
  }
  .site-nav a { padding: 8px 12px; }
  .centered-hero { padding: 112px 0 46px; }
  .product-bento { grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); align-items: stretch; gap: 20px; }
  .visual-card { min-height: 560px; }
  .app-shot { width: 310px; }
  .status-stack { align-content: center; }
  .ability-grid { grid-template-columns: repeat(4, 1fr); }
  .roadmap { grid-template-columns: repeat(6, 1fr); gap: 12px; }
  .roadmap-item { grid-template-columns: 1fr; padding: 16px; }
  .roadmap-item:nth-child(even) { transform: translateY(24px); }
  .category-bento { grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(170px, auto); }
  .category-card.featured { grid-column: span 2; grid-row: span 2; }
  .category-card.wide { grid-column: span 2; }
  .bento-grid { grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(176px, auto); }
  .bento-card.large { grid-column: span 2; grid-row: span 2; }
  .bento-card.medium { grid-column: span 2; }
  .security-layout { grid-template-columns: .95fr 1.05fr; gap: 34px; }
  .scenario-grid { grid-template-columns: repeat(5, 1fr); }
  .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; }
  .doc-aside { position: sticky; top: 92px; }
}
@media (max-width: 420px) {
  .container, .narrow, .header-inner, .footer-inner { width: min(100% - 24px, 1160px); }
  .download-btn { width: 100%; }
  .hero-tags, .tag-row, .mini-tags { justify-content: center; }
  .roadmap-item { grid-template-columns: 42px 1fr; padding: 14px; }
}