:root {
  --primary: rgb(70,139,223);
  --primary-dark: #1f5fae;
  --primary-soft: #eaf3ff;
  --ink: #102033;
  --muted: #65758b;
  --line: #dbe8f8;
  --panel: rgba(255,255,255,.86);
  --bg: #f6faff;
  --radius: 22px;
  --shadow: 0 16px 40px rgba(44, 101, 170, .12);
}
* { 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:
    radial-gradient(circle at 0% 0%, rgba(70,139,223,.16), transparent 34%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 46%, #f4f8ff 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,.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(219,232,248,.72);
}
.nav-wrap { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .02em; color: #143452; }
.logo { width: 38px; height: 38px; border-radius: 12px; }
.nav-toggle { border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 12px; padding: 8px 11px; font-size: 20px; }
.main-nav {
  display: none; position: absolute; left: 16px; right: 16px; top: 68px;
  background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 12px;
  box-shadow: var(--shadow);
}
.main-nav.is-open { display: grid; }
.main-nav a { padding: 10px 12px; color: #31445f; border-radius: 12px; font-size: 15px; }
.main-nav a:hover { background: var(--primary-soft); color: var(--primary-dark); }
.section { padding: 54px 0; }
.section-tight { padding: 34px 0; }
.eyebrow, .badge {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--primary-dark); background: rgba(70,139,223,.1);
  border: 1px solid rgba(70,139,223,.18); border-radius: 999px;
  padding: 6px 12px; font-size: 13px; font-weight: 700;
}
h1, h2, h3 { line-height: 1.24; margin: 0; color: #10243d; }
h1 { font-size: clamp(34px, 7vw, 62px); letter-spacing: -.045em; }
h2 { font-size: clamp(26px, 4vw, 40px); letter-spacing: -.03em; }
h3 { font-size: 20px; }
p { color: var(--muted); margin: 12px 0 0; }
.hero { padding: 42px 0 58px; }
.hero-layout {
  display: grid; gap: 28px; align-items: center;
  padding: 28px; border-radius: 28px;
  background: linear-gradient(135deg, rgba(255,255,255,.94), rgba(235,245,255,.86));
  border: 1px solid rgba(193,218,248,.75);
  box-shadow: var(--shadow);
  position: relative; overflow: hidden;
}
.hero-layout:before {
  content: ""; position: absolute; width: 360px; height: 360px; border-radius: 50%;
  background: rgba(70,139,223,.13); right: -150px; top: -110px;
}
.hero-content, .hero-visual { position: relative; z-index: 1; }
.hero-content p.lead { font-size: 17px; color: #53677f; max-width: 680px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 24px; }
.hero-tags span, .mini-tag {
  border: 1px solid rgba(70,139,223,.18); color: #285b93; background: rgba(255,255,255,.75);
  border-radius: 999px; padding: 7px 11px; font-size: 13px; font-weight: 700;
}
.download-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 12px 24px; border-radius: 999px;
  background: var(--primary); color: #fff; font-weight: 800;
  box-shadow: 0 14px 24px rgba(70,139,223,.28);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: #3d7fd1; box-shadow: 0 18px 30px rgba(70,139,223,.32); }
.visual-card {
  background: rgba(255,255,255,.86); border: 1px solid rgba(219,232,248,.88);
  border-radius: 26px; padding: 18px; box-shadow: var(--shadow);
}
.phone-stage { display: grid; place-items: center; min-height: 280px; background: linear-gradient(180deg, #f4f9ff, #fff); border-radius: 24px; border: 1px solid #e3eefb; }
.app-img { width: min(250px, 76vw); filter: drop-shadow(0 20px 30px rgba(35,80,130,.18)); }
.status-row { display: grid; gap: 10px; margin-top: 14px; }
.status-card {
  background: #fff; border: 1px solid #e2edf9; border-radius: 18px;
  padding: 13px 14px; display: flex; justify-content: space-between; gap: 14px; align-items: center;
}
.status-card strong { font-size: 14px; color: #213b58; }
.status-card small { color: #6d7c91; }
.status-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 6px rgba(70,139,223,.13); }
.trust-bar, .metric-bar {
  display: grid; gap: 14px;
}
.metric-card, .category-card, .feature-card, .scenario-card, .faq-item, .note-card, .step-card {
  background: var(--panel); border: 1px solid rgba(219,232,248,.9); border-radius: var(--radius); box-shadow: 0 10px 30px rgba(44,101,170,.08);
}
.metric-card { padding: 18px; }
.metric-card span { color: var(--primary-dark); font-weight: 900; font-size: 14px; }
.metric-card p { font-size: 14px; }
.section-head { margin-bottom: 22px; max-width: 780px; }
.section-head p { font-size: 16px; }
.category-grid, .feature-grid, .scenario-grid, .article-grid { display: grid; gap: 16px; }
.category-card, .feature-card, .scenario-card { padding: 22px; }
.category-card { display: flex; flex-direction: column; min-height: 176px; }
.category-card .link, .text-link { color: var(--primary-dark); font-weight: 800; margin-top: auto; padding-top: 14px; }
.feature-card .icon, .category-card .icon {
  width: 42px; height: 42px; border-radius: 15px; display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary-dark); font-weight: 900; margin-bottom: 14px;
}
.security-layout { display: grid; gap: 22px; align-items: center; }
.security-panel {
  background: linear-gradient(160deg, #ffffff, #edf6ff);
  border: 1px solid #dceafa; border-radius: 28px; padding: 24px; box-shadow: var(--shadow);
}
.security-line { display: flex; gap: 12px; padding: 14px 0; border-bottom: 1px solid #dceafa; }
.security-line:last-child { border-bottom: 0; }
.security-line b { color: var(--primary-dark); }
.steps { display: grid; gap: 14px; counter-reset: steps; }
.step-card { padding: 20px; position: relative; }
.step-card:before {
  counter-increment: steps; content: counter(steps);
  width: 34px; height: 34px; border-radius: 12px; display: grid; place-items: center;
  background: var(--primary); color: #fff; font-weight: 900; margin-bottom: 12px;
}
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item h3 { font-size: 18px; }
.cta-section {
  text-align: center; padding: 42px 24px; border-radius: 28px;
  background: linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.92));
  border: 1px solid rgba(70,139,223,.18); box-shadow: var(--shadow);
}
.page-hero { padding: 48px 0 22px; }
.page-hero .page-card {
  padding: 28px; border-radius: 28px; background: rgba(255,255,255,.88);
  border: 1px solid #dceafa; box-shadow: var(--shadow);
}
.content-panel { background: #fff; border: 1px solid #e2edf9; border-radius: 24px; padding: 24px; box-shadow: 0 12px 32px rgba(44,101,170,.08); }
.content-panel h2 { font-size: 26px; margin-top: 28px; }
.content-panel h2:first-child { margin-top: 0; }
ul.clean-list { padding-left: 0; list-style: none; display: grid; gap: 10px; }
ul.clean-list li { padding: 12px 14px; border-radius: 16px; background: #f5f9ff; border: 1px solid #e2edf9; color: #465b73; }
.guide-layout { display: grid; gap: 20px; align-items: start; }
.side-panel { display: grid; gap: 14px; }
.note-card { padding: 18px; }
.note-card strong { color: #163655; }
.download-area { margin-top: 22px; }
.download-steps { display: grid; gap: 14px; margin-top: 24px; }
.download-page .download-btn { margin-top: 22px; }
.site-footer { margin-top: 44px; background: #10243d; color: #d8e7fa; padding: 44px 0 24px; }
.footer-grid { display: grid; gap: 24px; }
.site-footer p, .site-footer a { color: #b9cce2; }
.site-footer a { display: block; margin-top: 8px; }
.site-footer h3 { color: #fff; font-size: 17px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 900; }
.footer-brand img { width: 34px; height: 34px; border-radius: 10px; }
.copyright { border-top: 1px solid rgba(255,255,255,.12); margin-top: 28px; padding-top: 18px; color: #9db3cb; font-size: 13px; }
@media (min-width: 640px) {
  .metric-bar { grid-template-columns: repeat(2, 1fr); }
  .category-grid, .scenario-grid, .article-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .container { width: min(1120px, calc(100% - 56px)); }
  .nav-toggle { display: none; }
  .main-nav { display: flex; position: static; padding: 0; border: 0; box-shadow: none; background: transparent; align-items: center; gap: 4px; }
  .hero { padding: 64px 0 72px; }
  .hero-layout { grid-template-columns: 1.05fr .95fr; padding: 46px; }
  .hero-content p.lead { font-size: 18px; }
  .metric-bar { grid-template-columns: repeat(4, 1fr); }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
  .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .security-layout, .guide-layout { grid-template-columns: 1.15fr .85fr; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1.5fr .8fr .8fr; }
  .page-hero .page-card { padding: 42px; }
}
@media (min-width: 1100px) {
  .steps.steps-six { grid-template-columns: repeat(6, 1fr); }
  .steps.steps-six .step-card { padding: 16px; }
}