:root {
  --primary: rgb(70,139,223);
  --primary-dark: #245da9;
  --primary-soft: #eaf4ff;
  --primary-soft-2: #f4f9ff;
  --text: #162033;
  --muted: #61708a;
  --border: #dce8f6;
  --card: #ffffff;
  --bg: #f7fbff;
  --shadow: 0 18px 45px rgba(33, 93, 168, .12);
  --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(--text);
  background: linear-gradient(180deg, #f7fbff 0%, #ffffff 42%, #f4f9ff 100%);
  line-height: 1.72;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(100% - 32px, 1160px); margin: 0 auto; }
.narrow { width: min(100% - 32px, 880px); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(220, 232, 246, .88);
}
.header-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo, .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: .02em;
  color: #122442;
}
.logo img, .footer-logo img { border-radius: 12px; box-shadow: 0 10px 24px rgba(70,139,223,.18); }
.nav-toggle { display: none; }
.nav-trigger {
  width: 42px;
  height: 42px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
}
.nav-trigger span { width: 18px; height: 2px; background: #243b5a; border-radius: 8px; }
.site-nav {
  position: absolute;
  top: 70px;
  left: 16px;
  right: 16px;
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.nav-toggle:checked ~ .site-nav { display: flex; }
.site-nav a {
  padding: 10px 12px;
  border-radius: 12px;
  color: #354761;
  font-size: 15px;
}
.site-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }

.hero {
  position: relative;
  padding: 46px 0 34px;
  background:
    radial-gradient(circle at 10% 0%, rgba(70,139,223,.18), transparent 28%),
    linear-gradient(135deg, #f7fbff 0%, #eef7ff 58%, #ffffff 100%);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -110px;
  top: -90px;
  width: 320px;
  height: 320px;
  background: rgba(70,139,223,.10);
  border-radius: 50%;
}
.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  align-items: center;
}
.eyebrow, .badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  border: 1px solid rgba(70,139,223,.18);
  font-size: 13px;
  font-weight: 700;
}
h1, h2, h3 { line-height: 1.22; margin: 0 0 12px; color: #122442; }
h1 { font-size: clamp(32px, 7vw, 58px); letter-spacing: -.04em; }
h2 { font-size: clamp(25px, 4.8vw, 38px); letter-spacing: -.03em; }
h3 { font-size: 20px; }
p { margin: 0 0 14px; color: var(--muted); }
.hero p { font-size: 17px; color: #465977; }
.hero-tags, .tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 24px; }
.tag, .mini-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.82);
  border: 1px solid var(--border);
  color: #38506e;
  font-size: 13px;
  box-shadow: 0 10px 24px rgba(70,139,223,.08);
}
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  background: rgb(70,139,223);
  color: #fff;
  font-weight: 800;
  border: 0;
  box-shadow: 0 14px 28px rgba(70,139,223,.28);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(70,139,223,.34); background: var(--primary-dark); }
.hero-visual { position: relative; min-height: 420px; }
.phone-card {
  position: relative;
  width: min(72vw, 310px);
  margin: 0 auto;
  padding: 16px;
  border-radius: 32px;
  background: rgba(255,255,255,.76);
  border: 1px solid rgba(255,255,255,.9);
  box-shadow: var(--shadow);
}
.phone-card img { border-radius: 26px; }
.float-card, .status-card, .asset-card, .risk-card {
  position: absolute;
  background: rgba(255,255,255,.92);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 12px 14px;
  box-shadow: 0 16px 38px rgba(33, 93, 168, .13);
  color: #1a2b44;
}
.status-card { top: 20px; left: 0; max-width: 210px; }
.asset-card { right: 0; top: 145px; max-width: 190px; }
.risk-card { left: 14px; bottom: 22px; max-width: 210px; }
.float-card strong, .status-card strong, .asset-card strong, .risk-card strong { display: block; font-size: 14px; }
.float-card span, .status-card span, .asset-card span, .risk-card span { display: block; font-size: 12px; color: var(--muted); }
.status-dot { width: 9px; height: 9px; display: inline-block; border-radius: 50%; background: #21b57a; margin-right: 6px; box-shadow: 0 0 0 5px rgba(33,181,122,.14); }

.section { padding: 58px 0; }
.section-soft { background: linear-gradient(180deg, #f5faff 0%, #ffffff 100%); }
.section-head { margin-bottom: 24px; max-width: 740px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.security-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(255,255,255,.86);
  box-shadow: var(--shadow);
}
.strip-item { padding: 16px; border-radius: 18px; background: linear-gradient(180deg, #ffffff, #f6fbff); border: 1px solid #e4effb; }
.strip-item strong { display: block; color: #142843; margin-bottom: 4px; }
.strip-item span { color: var(--muted); font-size: 14px; }

.grid, .feature-grid, .category-grid, .scenario-grid, .article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.card, .feature-card, .category-card, .scenario-card, .guide-card, .faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 12px 30px rgba(33,93,168,.08);
}
.category-card, .guide-card { transition: transform .18s ease, border-color .18s ease; }
.category-card:hover, .guide-card:hover { transform: translateY(-3px); border-color: rgba(70,139,223,.48); }
.card-icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 900;
  margin-bottom: 12px;
}
.link-more { display: inline-flex; color: var(--primary-dark); font-weight: 800; margin-top: 4px; }

.path-steps { display: grid; grid-template-columns: 1fr; gap: 14px; counter-reset: step; }
.step-card {
  position: relative;
  padding: 20px;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: 0 12px 30px rgba(33,93,168,.08);
  counter-increment: step;
}
.step-card::before {
  content: counter(step, decimal-leading-zero);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 12px;
  border-radius: 13px;
  background: rgb(70,139,223);
  color: #fff;
  font-weight: 900;
}
.security-layout, .split-layout, .download-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
}
.security-panel {
  background: linear-gradient(145deg, #ffffff, #edf6ff);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.panel-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid #dbe9f8;
}
.panel-row:last-child { border-bottom: 0; }
.panel-row span { color: var(--muted); font-size: 13px; }
.panel-row strong { color: #122442; }
.process-list { display: grid; gap: 12px; }
.process-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--border);
}
.process-num {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 900;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.cta-section {
  text-align: center;
  border-radius: 30px;
  padding: 34px 20px;
  background:
    radial-gradient(circle at 20% 0, rgba(70,139,223,.18), transparent 30%),
    linear-gradient(135deg, #eef7ff, #ffffff);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.page-hero { padding: 46px 0 28px; background: linear-gradient(135deg, #f3f9ff, #ffffff); border-bottom: 1px solid var(--border); }
.page-hero .narrow { display: grid; gap: 12px; }
.article { padding: 46px 0 64px; }
.article-content {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.article-content h2 { font-size: 25px; margin-top: 26px; }
.article-content ul, .article-content ol { color: var(--muted); padding-left: 20px; }
.article-content li { margin-bottom: 8px; }
.notice, .tip-box {
  padding: 16px 18px;
  border-radius: 20px;
  background: var(--primary-soft-2);
  border: 1px solid var(--border);
  margin: 18px 0;
}
.notice strong, .tip-box strong { color: #122442; }
.check-list { display: grid; gap: 10px; margin: 18px 0; }
.check-list div {
  padding: 13px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
}
.download-single { margin-top: 24px; }
.faq-list { display: grid; gap: 14px; }
.faq-item h2, .faq-item h3 { font-size: 18px; margin-bottom: 8px; }

.site-footer {
  background: #10223b;
  color: #d9e7f8;
  padding: 42px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.site-footer p, .site-footer a, .site-footer span { color: #b8c7db; }
.site-footer h3 { color: #fff; font-size: 16px; }
.site-footer a { display: block; margin: 8px 0; }
.footer-logo { color: #fff; margin-bottom: 12px; }
.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 22px;
  margin-top: 22px;
  border-top: 1px solid rgba(255,255,255,.12);
  font-size: 13px;
}

@media (min-width: 640px) {
  .category-grid, .scenario-grid, .article-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .security-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .nav-trigger { display: none; }
  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: transparent;
  }
  .site-nav a { padding: 9px 12px; }
  .hero { padding: 82px 0 64px; }
  .hero-layout { grid-template-columns: 1.05fr .95fr; gap: 54px; }
  .security-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .path-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .security-layout, .split-layout, .download-layout { grid-template-columns: .95fr 1.05fr; gap: 44px; }
  .download-layout { grid-template-columns: 1.1fr .9fr; }
  .scenario-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article-content { padding: 34px; }
  .footer-grid { grid-template-columns: 1.7fr 1fr 1fr 1fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}

@media (min-width: 1100px) {
  .hero-visual { min-height: 500px; }
  .phone-card { width: 340px; }
  .status-card { left: 12px; top: 36px; }
  .asset-card { right: 6px; top: 170px; }
  .risk-card { left: 34px; bottom: 34px; }
}