:root {
  --primary: rgb(70,139,223);
  --primary-dark: #1f5796;
  --ink: #102033;
  --muted: #637084;
  --line: #dbe8f7;
  --soft: #f4f8fd;
  --soft-blue: #eaf4ff;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(35, 82, 130, .10);
  --radius: 24px;
}
* { 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, #f8fbff 0%, #ffffff 36%, #f4f8fd 100%);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(219,232,247,.88);
}
.nav-shell {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  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; letter-spacing: .02em; }
.brand-logo { width: 38px; height: 38px; border-radius: 12px; }
.brand-text { white-space: nowrap; }
.nav-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--ink); border-radius: 99px; }
.site-nav {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 74px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255,255,255,.98);
  box-shadow: var(--shadow);
  display: none;
  flex-direction: column;
  gap: 4px;
}
.site-nav.is-open { display: flex; }
.site-nav a { padding: 10px 12px; color: var(--muted); border-radius: 12px; font-size: 14px; }
.site-nav a.active, .site-nav a:hover { color: var(--primary-dark); background: var(--soft-blue); }
.section, .content-container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}
.section { padding: 72px 0; }
.section-eyebrow, .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(70,139,223,.10);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
}
h1, h2, h3 { line-height: 1.16; margin: 0; letter-spacing: -.03em; }
p { margin: 0; color: var(--muted); }
.lead { font-size: 18px; color: #405065; }
.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 30px rgba(70,139,223,.22);
  border: 1px solid rgba(70,139,223,.18);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 38px rgba(70,139,223,.30); background: #3f83d6; }
.magazine-hero {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0 50px;
  display: grid;
  gap: 42px;
}
.hero-copy { display: grid; gap: 24px; align-content: center; }
.hero-copy h1 { font-size: clamp(40px, 10vw, 78px); max-width: 840px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span { border: 1px solid var(--line); background: rgba(255,255,255,.78); border-radius: 999px; padding: 8px 12px; color: #4b5b70; font-size: 13px; }
.product-visual {
  min-height: 430px;
  position: relative;
  border-radius: 34px;
  background: radial-gradient(circle at 30% 20%, #ffffff 0, #eaf4ff 38%, #dcebff 100%);
  border: 1px solid rgba(70,139,223,.14);
  box-shadow: var(--shadow);
  padding: 28px;
  overflow: hidden;
}
.product-visual:before { content: ""; position: absolute; inset: 12%; border: 1px solid rgba(70,139,223,.18); border-radius: 50%; }
.app-shot { width: min(270px, 72%); margin: 22px auto 0; filter: drop-shadow(0 30px 45px rgba(16,32,51,.22)); position: relative; z-index: 2; }
.float-card {
  position: absolute;
  z-index: 3;
  background: rgba(255,255,255,.92);
  border: 1px solid rgba(219,232,247,.95);
  border-radius: 18px;
  box-shadow: 0 12px 32px rgba(33,75,117,.10);
  padding: 12px 14px;
  color: #405065;
  font-size: 13px;
}
.float-card strong { display: block; color: var(--ink); font-size: 14px; }
.float-card.one { top: 34px; left: 22px; }
.float-card.two { right: 20px; top: 42%; }
.float-card.three { left: 30px; bottom: 34px; }
.brand-statement {
  width: min(1120px, calc(100% - 32px));
  margin: 28px auto 0;
  padding: 46px 28px;
  border-radius: 32px;
  background: linear-gradient(135deg, #ffffff, #eff7ff);
  border: 1px solid rgba(70,139,223,.12);
  box-shadow: var(--shadow);
  display: grid;
  gap: 22px;
}
.statement-quote { font-size: clamp(28px, 7vw, 54px); color: var(--ink); line-height: 1.12; max-width: 900px; }
.statement-text { display: grid; gap: 12px; }
.split-section { display: grid; gap: 26px; align-items: center; }
.split-panel {
  border-radius: 30px;
  background: #fff;
  border: 1px solid var(--line);
  padding: 28px;
  box-shadow: var(--shadow);
}
.info-panel { background: linear-gradient(145deg, #f7fbff, #eaf4ff); }
.numbered-title { display: grid; gap: 16px; }
.numbered-title .num { color: var(--primary); font-weight: 900; letter-spacing: .1em; }
.numbered-title h2 { font-size: clamp(28px, 6vw, 48px); }
.story-timeline { position: relative; display: grid; gap: 18px; margin-top: 32px; }
.timeline-item {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 22px;
  background: rgba(255,255,255,.86);
  box-shadow: 0 12px 32px rgba(35,82,130,.07);
}
.timeline-item .step { color: var(--primary); font-weight: 900; letter-spacing: .08em; }
.timeline-item h3 { font-size: 21px; margin: 8px 0; }
.text-link { color: var(--primary-dark); font-weight: 800; display: inline-flex; margin-top: 12px; }
.chapter-index {
  display: grid;
  gap: 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 36px 0;
}
.chapter-list { display: grid; gap: 0; }
.chapter-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.chapter-row:last-child { border-bottom: 0; }
.chapter-no { font-size: 18px; font-weight: 900; color: var(--primary); }
.chapter-row h3 { font-size: 22px; margin-bottom: 6px; }
.scenario-story-grid { display: grid; gap: 18px; margin-top: 30px; }
.scenario-card {
  padding: 24px;
  border-radius: 26px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(35,82,130,.06);
}
.scenario-card h3 { font-size: 22px; margin-bottom: 10px; }
.risk-panel {
  border-radius: 34px;
  padding: 30px;
  background: linear-gradient(135deg, #eaf4ff, #f8fbff);
  border: 1px solid rgba(70,139,223,.16);
}
.risk-list { display: grid; gap: 14px; margin-top: 24px; }
.risk-item { background: rgba(255,255,255,.76); border: 1px solid rgba(219,232,247,.92); border-radius: 20px; padding: 18px; }
.risk-item strong { display: block; margin-bottom: 6px; }
.faq-list { display: grid; gap: 14px; margin-top: 26px; }
.faq-item { border: 1px solid var(--line); border-radius: 22px; background: #fff; padding: 22px; }
.faq-item h3 { font-size: 20px; margin-bottom: 8px; }
.cta-section {
  text-align: center;
  border-radius: 34px;
  background: linear-gradient(135deg, #ffffff, #eaf4ff);
  border: 1px solid rgba(70,139,223,.14);
  padding: 44px 24px;
  box-shadow: var(--shadow);
}
.cta-section h2 { font-size: clamp(28px, 7vw, 48px); margin-bottom: 14px; }
.cta-section p { max-width: 680px; margin: 0 auto 24px; }
.page-hero {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 70px 0 34px;
  display: grid;
  gap: 18px;
}
.page-hero h1 { font-size: clamp(34px, 9vw, 64px); }
.guide-layout { width: min(1120px, calc(100% - 32px)); margin: 0 auto 80px; display: grid; gap: 22px; }
.article-body { display: grid; gap: 20px; }
.article-body .block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 24px;
  box-shadow: 0 10px 28px rgba(35,82,130,.06);
}
.article-body h2 { font-size: 25px; margin-bottom: 10px; }
.side-note { background: linear-gradient(145deg, #f8fbff, #eaf4ff); border: 1px solid var(--line); border-radius: 26px; padding: 24px; align-self: start; }
.check-list { display: grid; gap: 10px; padding: 0; margin: 14px 0 0; list-style: none; }
.check-list li { padding: 12px 14px; border-radius: 14px; background: var(--soft); color: #405065; }
.download-center { margin-top: 10px; }
.download-steps { counter-reset: step; display: grid; gap: 14px; margin-top: 24px; }
.download-steps div { counter-increment: step; padding: 18px; border-radius: 20px; border: 1px solid var(--line); background: #fff; }
.download-steps div:before { content: counter(step, decimal-leading-zero); color: var(--primary); font-weight: 900; display: block; margin-bottom: 4px; }
.about-grid { display: grid; gap: 18px; margin-top: 28px; }
.about-card { padding: 24px; border: 1px solid var(--line); border-radius: 26px; background: #fff; box-shadow: 0 10px 28px rgba(35,82,130,.06); }
.site-footer { background: #102033; color: #dbe8f7; margin-top: 80px; }
.footer-inner { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 42px 0; display: grid; gap: 26px; }
.footer-inner p { color: #b8c8da; max-width: 560px; }
.footer-logo { width: 42px; border-radius: 12px; margin-bottom: 12px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { color: #dbe8f7; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 16px; text-align: center; color: #8fa4bb; font-size: 13px; }
@media (min-width: 760px) {
  .scenario-story-grid, .about-grid { grid-template-columns: repeat(2, 1fr); }
  .risk-list { grid-template-columns: repeat(2, 1fr); }
  .guide-layout { grid-template-columns: minmax(0, 1fr) 310px; }
}
@media (min-width: 980px) {
  .nav-toggle { display: none; }
  .site-nav { position: static; display: flex; flex-direction: row; align-items: center; width: auto; padding: 0; border: 0; background: transparent; box-shadow: none; }
  .site-nav a { padding: 8px 12px; }
  .magazine-hero { grid-template-columns: 1.04fr .96fr; padding-top: 96px; }
  .brand-statement { grid-template-columns: .9fr 1.1fr; padding: 64px; }
  .split-section { grid-template-columns: .95fr 1.05fr; }
  .split-section.reverse { grid-template-columns: 1.05fr .95fr; }
  .chapter-index { grid-template-columns: .9fr 1.1fr; }
  .story-timeline { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .timeline-item:nth-child(even) { transform: translateY(34px); }
  .scenario-story-grid { grid-template-columns: 1.2fr .8fr .8fr; }
  .scenario-card.featured { grid-row: span 2; min-height: 330px; display: flex; flex-direction: column; justify-content: flex-end; background: linear-gradient(145deg, #ffffff, #eaf4ff); }
  .footer-inner { grid-template-columns: 1fr 300px; }
}