:root {
  --primary: rgb(70,139,223);
  --primary-dark: #2c6ec2;
  --primary-soft: #eaf4ff;
  --primary-pale: #f4f9ff;
  --ink: #122033;
  --muted: #5d6b80;
  --line: #dce8f6;
  --card: #ffffff;
  --bg: #f7fbff;
  --shadow: 0 18px 45px rgba(35, 82, 130, .10);
  --shadow-soft: 0 10px 28px rgba(35, 82, 130, .08);
  --radius: 22px;
}
* { 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(--ink);
  background: linear-gradient(180deg, #f6fbff 0%, #ffffff 42%, #f8fbff 100%);
  line-height: 1.72;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; 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,.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(220,232,246,.86);
}
.header-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .02em; }
.brand-logo { width: 40px; height: 40px; object-fit: contain; }
.brand-name { font-size: 18px; color: var(--ink); }
.site-nav { display: none; align-items: center; gap: 4px; }
.site-nav a { padding: 10px 12px; border-radius: 999px; color: #31435c; font-size: 15px; }
.site-nav a:hover { color: var(--primary-dark); background: var(--primary-soft); }
.nav-toggle { width: 44px; height: 44px; border: 0; background: var(--primary-soft); border-radius: 14px; display: grid; place-items: center; gap: 4px; padding: 11px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--primary-dark); display: block; border-radius: 6px; }
.site-nav.is-open { display: flex; position: absolute; top: 70px; left: 16px; right: 16px; flex-direction: column; align-items: stretch; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 10px; box-shadow: var(--shadow); }
.site-nav.is-open a { padding: 12px 14px; }
.section { padding: 56px 0; }
.section-sm { padding: 38px 0; }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-eyebrow, .badge, .category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 13px;
}
h1, h2, h3 { line-height: 1.22; margin: 0 0 14px; color: var(--ink); }
h1 { font-size: clamp(34px, 7vw, 58px); letter-spacing: -.04em; }
h2 { font-size: clamp(26px, 4vw, 38px); letter-spacing: -.03em; }
h3 { font-size: 20px; }
p { margin: 0 0 14px; color: var(--muted); }
.hero { padding: 54px 0 38px; background: radial-gradient(circle at 20% 8%, rgba(70,139,223,.20), transparent 30%), linear-gradient(135deg, #ffffff 0%, #f3f9ff 68%, #eaf4ff 100%); }
.hero-layout { display: grid; gap: 30px; align-items: center; }
.hero-copy { max-width: 640px; }
.hero-copy p { font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 22px; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  font-weight: 800;
  box-shadow: 0 14px 28px rgba(70,139,223,.28);
  border: 1px solid rgba(70,139,223,.10);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 16px 32px rgba(70,139,223,.34); }
.trust-tags, .tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 0; }
.trust-tags span, .tag-list span { padding: 8px 11px; border: 1px solid var(--line); background: rgba(255,255,255,.72); border-radius: 999px; color: #324761; font-size: 13px; }
.hero-visual { position: relative; min-height: 420px; display: grid; place-items: center; }
.device-frame { width: min(330px, 76vw); border-radius: 34px; padding: 14px; background: rgba(255,255,255,.78); border: 1px solid rgba(255,255,255,.9); box-shadow: var(--shadow); }
.device-frame img { border-radius: 26px; }
.float-card { position: absolute; width: min(220px, 52vw); background: rgba(255,255,255,.86); border: 1px solid rgba(220,232,246,.9); border-radius: 20px; padding: 14px; box-shadow: var(--shadow-soft); backdrop-filter: blur(12px); }
.float-card strong { display: block; margin-bottom: 4px; }
.float-card small { color: var(--muted); line-height: 1.5; display: block; }
.float-card.status { left: 0; top: 28px; }
.float-card.assets { right: 0; bottom: 46px; }
.float-card.risk { left: 8px; bottom: 10px; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: #20b486; display: inline-block; margin-right: 6px; }
.metric-strip { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: -10px; }
.metric-item { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px; box-shadow: var(--shadow-soft); }
.metric-item strong { display: block; font-size: 22px; color: var(--primary-dark); margin-bottom: 5px; }
.grid, .feature-grid, .category-grid, .scenario-grid, .guide-grid { display: grid; gap: 16px; }
.feature-grid, .category-grid, .scenario-grid { grid-template-columns: 1fr; }
.card, .category-card, .feature-card, .scenario-card, .faq-item, .notice-card, .step-card, .article-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-soft);
}
.category-card, .feature-card, .scenario-card, .step-card { transition: transform .2s ease, border-color .2s ease; }
.category-card:hover, .feature-card:hover, .scenario-card:hover, .step-card:hover { transform: translateY(-3px); border-color: rgba(70,139,223,.45); }
.card-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 15px; background: var(--primary-soft); color: var(--primary-dark); font-weight: 900; margin-bottom: 12px; }
.card-link { display: inline-flex; margin-top: 10px; color: var(--primary-dark); font-weight: 800; }
.process-steps { display: grid; gap: 14px; counter-reset: step; }
.step-card { position: relative; overflow: hidden; }
.step-card::before { counter-increment: step; content: counter(step); position: absolute; right: 18px; top: 12px; font-weight: 900; font-size: 42px; line-height: 1; color: rgba(70,139,223,.12); }
.security-layout, .split-layout { display: grid; gap: 24px; align-items: center; }
.security-panel { background: linear-gradient(145deg, #ffffff, #eef7ff); border: 1px solid var(--line); border-radius: 28px; padding: 22px; box-shadow: var(--shadow); }
.security-row { display: flex; justify-content: space-between; gap: 16px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--line); }
.security-row:last-child { border-bottom: 0; }
.security-row span { color: var(--muted); }
.security-row strong { color: var(--primary-dark); }
.cta-section { margin: 56px 0 0; text-align: center; border-radius: 30px; padding: 38px 22px; background: linear-gradient(135deg, #eef7ff 0%, #ffffff 72%); border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.cta-section p { max-width: 680px; margin-left: auto; margin-right: auto; }
.page-hero { padding: 54px 0 28px; background: linear-gradient(135deg, #ffffff 0%, #f1f8ff 100%); border-bottom: 1px solid var(--line); }
.page-hero .container { max-width: 920px; }
.page-hero h1 { font-size: clamp(32px, 6vw, 48px); }
.article-wrap { width: min(900px, calc(100% - 32px)); margin: 0 auto; padding: 38px 0 60px; }
.article-content { display: grid; gap: 18px; }
.article-content p { font-size: 16px; }
.info-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.info-list li { padding: 13px 14px; background: var(--primary-pale); border: 1px solid var(--line); border-radius: 16px; color: #33445a; }
.check-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; color: #42536a; }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--primary-dark); font-weight: 900; }
.timeline { display: grid; gap: 14px; }
.timeline-item { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; }
.timeline-index { width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: 900; }
.table-like { border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.table-like div { display: grid; gap: 6px; padding: 14px; border-bottom: 1px solid var(--line); background: #fff; }
.table-like div:nth-child(2n) { background: var(--primary-pale); }
.table-like div:last-child { border-bottom: 0; }
.faq-list { display: grid; gap: 14px; }
.faq-item h3 { margin-bottom: 8px; font-size: 18px; }
.download-panel { max-width: 760px; margin: 0 auto; text-align: center; background: #fff; border: 1px solid var(--line); border-radius: 28px; padding: 30px 20px; box-shadow: var(--shadow); }
.download-panel .download-btn { margin-top: 10px; }
.footer-grid { display: grid; gap: 22px; padding: 42px 0 24px; }
.site-footer { background: #0f2745; color: #dcecff; }
.site-footer p, .site-footer a, .footer-bottom { color: rgba(220,236,255,.78); }
.site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 10px; }
.site-footer a { display: block; padding: 5px 0; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; color: #fff; }
.footer-brand img { width: 34px; height: 34px; }
.footer-bottom { border-top: 1px solid rgba(220,236,255,.14); padding: 16px 0 24px; display: flex; flex-direction: column; gap: 8px; font-size: 13px; }
@media (min-width: 640px) {
  .metric-strip { grid-template-columns: repeat(2, 1fr); }
  .category-grid, .feature-grid, .scenario-grid, .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .container { width: min(1120px, calc(100% - 56px)); }
  .site-nav { display: flex; }
  .nav-toggle { display: none; }
  .hero { padding: 78px 0 52px; }
  .hero-layout { grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr); gap: 50px; }
  .metric-strip { grid-template-columns: repeat(4, 1fr); }
  .category-grid, .feature-grid, .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .security-layout, .split-layout { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}
@media (min-width: 1120px) {
  .process-steps { grid-template-columns: repeat(6, 1fr); }
}
@media (max-width: 420px) {
  .container { width: min(100% - 24px, 1120px); }
  .hero-visual { min-height: 390px; }
  .float-card { width: 190px; }
  .float-card.assets { right: -4px; }
  .download-btn { width: 100%; }
}