:root {
  --primary: rgb(70,139,223);
  --primary-dark: #2d6fbf;
  --primary-soft: #eaf4ff;
  --primary-mist: #f5f9ff;
  --ink: #0f2544;
  --muted: #5d6f87;
  --line: #dbe8f6;
  --card: rgba(255,255,255,.84);
  --white: #fff;
  --shadow: 0 20px 60px rgba(35, 91, 152, .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: linear-gradient(180deg, #f7fbff 0%, #ffffff 34%, #f8fbff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(219,232,246,.82);
}
.nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; letter-spacing: .02em; }
.logo { width: 36px; height: 36px; border-radius: 12px; }
.nav-toggle { display: none; }
.nav-trigger { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 14px; display: grid; place-content: center; gap: 5px; cursor: pointer; background: #fff; }
.nav-trigger span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; display: block; }
.site-nav { display: none; position: absolute; left: 16px; right: 16px; top: 72px; padding: 12px; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.site-nav a { display: block; padding: 12px 14px; color: var(--muted); border-radius: 12px; font-weight: 650; }
.site-nav a.active, .site-nav a:hover { color: var(--primary-dark); background: var(--primary-soft); }
.nav-toggle:checked ~ .site-nav { display: block; }
.section { padding: 54px 0; }
.section-heading { margin-bottom: 24px; }
.eyebrow, .badge { display: inline-flex; align-items: center; width: max-content; padding: 7px 12px; border-radius: 999px; background: var(--primary-soft); color: var(--primary-dark); font-weight: 750; font-size: 13px; }
h1, h2, h3 { line-height: 1.25; margin: 0; }
h1 { font-size: clamp(34px, 8vw, 68px); letter-spacing: -.055em; }
h2 { font-size: clamp(26px, 5vw, 42px); letter-spacing: -.035em; }
h3 { font-size: 20px; letter-spacing: -.015em; }
p { margin: 0; color: var(--muted); }
.lead { font-size: 17px; max-width: 760px; margin-left: auto; margin-right: auto; }
.centered-hero { padding: 78px 0 36px; text-align: center; background: radial-gradient(circle at 50% 0%, rgba(70,139,223,.18), transparent 36%); }
.centered-hero .lead { margin-top: 18px; }
.hero-actions { margin-top: 28px; display: flex; justify-content: center; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 26px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 34px rgba(70,139,223,.28);
  border: 0;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 44px rgba(70,139,223,.34); }
.security-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 22px auto 0; }
.security-tags span { padding: 8px 13px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.76); color: #34516f; font-weight: 700; font-size: 14px; }
.product-bento { display: grid; gap: 16px; padding-top: 22px; }
.product-card, .status-card, .bento-card, .category-card, .ability-card, .scenario-card, .faq-item, .doc-card, .notice-card, .download-panel {
  background: var(--card);
  border: 1px solid rgba(219,232,246,.92);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.product-card { min-height: 430px; padding: 26px; display: grid; place-items: center; background: linear-gradient(145deg, #fff, #edf6ff); position: relative; overflow: hidden; }
.product-card:before { content: ""; position: absolute; inset: 16px; border: 1px solid rgba(70,139,223,.16); border-radius: 26px; }
.product-card img { max-height: 380px; position: relative; z-index: 1; filter: drop-shadow(0 18px 38px rgba(15,37,68,.14)); }
.status-card { padding: 20px; min-height: 126px; }
.status-card strong { display: block; font-size: 16px; margin-bottom: 7px; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); display: inline-block; margin-right: 8px; }
.ability-grid, .scenario-grid, .risk-grid { display: grid; gap: 16px; }
.ability-card { padding: 22px; }
.ability-card span { display: inline-flex; width: 38px; height: 38px; border-radius: 14px; align-items: center; justify-content: center; background: var(--primary-soft); color: var(--primary-dark); font-weight: 850; margin-bottom: 12px; }
.roadmap { position: relative; display: grid; gap: 16px; }
.roadmap-item { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start; padding: 18px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.roadmap-num { width: 44px; height: 44px; border-radius: 16px; display: grid; place-items: center; background: var(--primary); color: #fff; font-weight: 850; }
.roadmap-item a, .text-link { color: var(--primary-dark); font-weight: 800; margin-top: 8px; display: inline-flex; }
.category-bento, .bento-grid { display: grid; gap: 16px; }
.category-card, .bento-card { padding: 24px; min-height: 168px; display: flex; flex-direction: column; gap: 10px; justify-content: space-between; }
.category-card:hover, .scenario-card:hover { transform: translateY(-2px); border-color: rgba(70,139,223,.42); }
.category-card, .scenario-card { transition: transform .2s ease, border-color .2s ease; }
.category-card a, .scenario-card a { color: var(--primary-dark); font-weight: 800; }
.bento-card.large { background: linear-gradient(145deg, #ffffff, #edf6ff); }
.bento-card.small { min-height: 132px; }
.security-layout { display: grid; gap: 20px; align-items: start; }
.security-panel { padding: 24px; border-radius: 28px; background: linear-gradient(145deg, #fff, #edf6ff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.principle-list { display: grid; gap: 12px; margin-top: 18px; }
.principle-list div { display: grid; grid-template-columns: 34px 1fr; gap: 10px; padding: 12px; border-radius: 16px; background: rgba(255,255,255,.78); border: 1px solid rgba(219,232,246,.9); }
.principle-list span { width: 34px; height: 34px; border-radius: 13px; background: var(--primary-soft); color: var(--primary-dark); display: grid; place-items: center; font-weight: 850; }
.scenario-card { padding: 22px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item summary { cursor: pointer; font-weight: 850; color: var(--ink); }
.faq-item p { margin-top: 10px; }
.cta-section { padding: 62px 0 78px; }
.cta-box { text-align: center; padding: 38px 20px; border-radius: 30px; background: linear-gradient(135deg, #eef7ff, #fff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.cta-box p { max-width: 680px; margin: 14px auto 24px; }
.site-footer { padding: 48px 0 24px; border-top: 1px solid var(--line); background: #fff; }
.footer-grid { display: grid; gap: 28px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 850; margin-bottom: 12px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 12px; }
.site-footer h3 { font-size: 16px; margin-bottom: 10px; }
.site-footer a { display: block; color: var(--muted); padding: 3px 0; }
.footer-bottom { margin-top: 28px; color: #8190a3; font-size: 13px; }
.page-hero { padding: 64px 0 24px; }
.page-hero-inner { max-width: 820px; }
.page-hero h1 { font-size: clamp(32px, 7vw, 54px); margin: 14px 0 16px; }
.doc-layout { display: grid; gap: 24px; align-items: start; padding-bottom: 72px; }
.doc-main { display: grid; gap: 18px; }
.doc-card { padding: 24px; }
.doc-card h2 { font-size: 24px; margin-bottom: 10px; }
.notice-card { padding: 20px; border-left: 5px solid var(--primary); background: #f2f8ff; }
.check-list, .step-list { padding: 0; margin: 14px 0 0; list-style: none; display: grid; gap: 10px; }
.check-list li, .step-list li { padding: 12px 14px; border-radius: 14px; background: var(--primary-mist); color: #314c6b; }
.side-panel { display: grid; gap: 16px; }
.side-panel .doc-card { position: sticky; top: 92px; }
.download-panel { padding: 26px; text-align: center; }
.simple-grid { display: grid; gap: 16px; }
.download-steps { counter-reset: step; display: grid; gap: 14px; margin: 20px 0; }
.download-steps div { padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.download-steps strong { display: block; color: var(--ink); }
@media (min-width: 720px) {
  .container { width: min(1120px, calc(100% - 48px)); }
  .ability-grid, .scenario-grid, .risk-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)); }
  .simple-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1.4fr .8fr .8fr; }
}
@media (min-width: 980px) {
  .nav-trigger { display: none; }
  .site-nav { display: flex; position: static; inset: auto; padding: 0; background: transparent; border: 0; border-radius: 0; box-shadow: none; gap: 4px; align-items: center; }
  .site-nav a { padding: 8px 12px; }
  .centered-hero { padding-top: 104px; }
  .product-bento { grid-template-columns: 1.3fr .7fr .7fr; grid-auto-rows: minmax(138px, auto); }
  .product-card { grid-row: span 2; min-height: 560px; }
  .status-card:nth-child(4) { grid-column: 2 / span 2; }
  .ability-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .roadmap { grid-template-columns: repeat(6, 1fr); gap: 12px; }
  .roadmap-item { grid-template-columns: 1fr; min-height: 238px; align-content: start; }
  .roadmap-item:nth-child(even) { margin-top: 34px; }
  .category-bento { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .category-card.featured { grid-column: span 2; min-height: 220px; }
  .bento-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .bento-card.large { grid-column: span 3; min-height: 240px; }
  .bento-card.medium { grid-column: span 2; min-height: 200px; }
  .bento-card.small { grid-column: span 1; min-height: 200px; }
  .security-layout { grid-template-columns: .9fr 1.1fr; gap: 34px; }
  .scenario-grid { grid-template-columns: repeat(5, 1fr); }
  .scenario-card { min-height: 208px; }
  .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; }
}
@media (max-width: 460px) {
  .container { width: min(100% - 24px, 1120px); }
  .section { padding: 42px 0; }
  .product-card { min-height: 360px; padding: 18px; }
  .product-card img { max-height: 310px; }
  .download-btn { width: 100%; }
  .hero-actions { padding: 0 12px; }
}