:root {
  --primary: rgb(70,139,223);
  --primary-soft: rgba(70,139,223,.10);
  --primary-mid: rgba(70,139,223,.18);
  --ink: #102033;
  --muted: #627084;
  --line: #dfe8f5;
  --paper: #ffffff;
  --mist: #f4f8fd;
  --deep: #17365f;
  --radius: 22px;
  --shadow: 0 22px 60px rgba(26, 72, 120, .10);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.75;
  background:
    radial-gradient(circle at top right, rgba(70,139,223,.12), transparent 34rem),
    linear-gradient(180deg, #ffffff 0%, #f7fbff 42%, #ffffff 100%);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(210,224,242,.72);
}

.header-inner,
.footer-inner,
.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 760;
  letter-spacing: .02em;
}

.brand-logo {
  width: 38px;
  height: 38px;
}

.brand-text {
  font-size: 16px;
}

.nav-toggle {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--deep);
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 700;
}

.site-nav {
  position: absolute;
  top: 72px;
  left: 16px;
  right: 16px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.96);
  box-shadow: var(--shadow);
}

.site-nav.is-open {
  display: flex;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: 12px;
  color: #38506a;
  font-size: 14px;
  font-weight: 650;
}

.site-nav a.active,
.site-nav a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.section,
.magazine-hero,
.page-hero,
.cta-section {
  padding: 72px 0;
}

.magazine-hero {
  padding-top: 54px;
}

.hero-grid {
  display: grid;
  gap: 34px;
  align-items: center;
}

.eyebrow,
.badge,
.chapter-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 8px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid var(--primary-mid);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 760;
  letter-spacing: .04em;
}

h1,
h2,
h3 {
  line-height: 1.18;
  margin: 0;
  color: var(--ink);
}

h1 {
  margin-top: 18px;
  font-size: clamp(36px, 11vw, 78px);
  letter-spacing: -.06em;
}

.page-hero h1 {
  font-size: clamp(34px, 8vw, 62px);
}

h2 {
  font-size: clamp(28px, 7vw, 48px);
  letter-spacing: -.04em;
}

h3 {
  font-size: 22px;
  letter-spacing: -.02em;
}

.lead {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  max-width: 720px;
}

.hero-actions,
.cta-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 136px;
  border-radius: 999px;
  padding: 13px 24px;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 780;
  letter-spacing: .02em;
  box-shadow: 0 14px 30px rgba(70,139,223,.26);
  transition: transform .2s ease, box-shadow .2s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(70,139,223,.32);
}

.security-tags {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.security-tags span {
  border: 1px solid var(--line);
  background: #fff;
  color: #42536a;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
}

.product-visual {
  position: relative;
  border-radius: 32px;
  padding: 28px;
  min-height: 440px;
  background:
    linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.74)),
    #f4f9ff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.product-visual::before {
  content: "";
  position: absolute;
  inset: 52px 36px auto auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(70,139,223,.16);
  filter: blur(6px);
}

.product-visual img {
  position: relative;
  z-index: 2;
  width: min(260px, 82%);
  margin: 10px auto 0;
  filter: drop-shadow(0 28px 50px rgba(24, 54, 95, .18));
}

.status-card {
  position: relative;
  z-index: 3;
  margin-top: 14px;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 18px;
  padding: 12px 14px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 14px 34px rgba(26, 72, 120, .08);
}

.status-card strong {
  display: block;
  font-size: 14px;
  color: var(--deep);
}

.status-card span {
  color: var(--muted);
  font-size: 13px;
}

.status-card.float-left,
.status-card.float-right {
  max-width: 250px;
}

.status-card.float-right {
  margin-left: auto;
}

.brand-statement {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 26px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.statement-quote {
  max-width: 880px;
  font-size: clamp(26px, 7vw, 54px);
  line-height: 1.22;
  letter-spacing: -.05em;
}

.statement-text {
  margin: 22px 0 0;
  color: var(--muted);
  max-width: 860px;
  font-size: 17px;
}

.split-section {
  display: grid;
  gap: 28px;
  align-items: center;
}

.split-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: rgba(255,255,255,.84);
  box-shadow: var(--shadow);
}

.info-panel {
  display: grid;
  gap: 14px;
}

.info-row,
.risk-item,
.faq-item,
.chapter-row,
.step-block,
.check-card,
.scenario-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.9);
}

.info-row {
  padding: 18px;
}

.info-row b,
.risk-item b {
  color: var(--deep);
}

.story-timeline {
  position: relative;
  margin-top: 36px;
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  gap: 12px;
  border-left: 2px solid var(--primary-mid);
  padding-left: 18px;
}

.timeline-number {
  color: var(--primary);
  font-weight: 820;
  letter-spacing: .12em;
}

.timeline-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(26, 72, 120, .06);
}

.text-link {
  display: inline-flex;
  margin-top: 10px;
  color: var(--primary);
  font-weight: 760;
}

.chapter-index {
  display: grid;
  gap: 30px;
  align-items: start;
}

.chapter-list {
  display: grid;
  gap: 12px;
}

.chapter-row {
  display: grid;
  gap: 10px;
  padding: 18px;
}

.chapter-row span {
  color: var(--primary);
  font-weight: 820;
  letter-spacing: .10em;
}

.scenario-story-grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.scenario-card {
  padding: 22px;
  min-height: 180px;
  background:
    linear-gradient(160deg, rgba(70,139,223,.08), rgba(255,255,255,.94));
}

.risk-panel {
  border-radius: 30px;
  padding: 28px;
  background:
    linear-gradient(135deg, rgba(70,139,223,.13), rgba(255,255,255,.86)),
    #f1f7ff;
  border: 1px solid var(--line);
}

.risk-grid {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.risk-item {
  padding: 18px;
}

.faq-list {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 20px;
}

.faq-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.cta-section {
  text-align: center;
}

.cta-card {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  border-radius: 32px;
  padding: 36px 24px;
  background:
    linear-gradient(135deg, rgba(70,139,223,.14), rgba(255,255,255,.92)),
    #f5faff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.cta-card p {
  color: var(--muted);
  max-width: 680px;
  margin: 16px auto 0;
}

.cta-actions {
  justify-content: center;
}

.page-hero {
  background:
    linear-gradient(180deg, rgba(70,139,223,.10), rgba(255,255,255,0));
}

.page-layout {
  display: grid;
  gap: 26px;
  align-items: start;
}

.article-body {
  display: grid;
  gap: 22px;
}

.article-card,
.side-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  background: rgba(255,255,255,.9);
  box-shadow: 0 16px 44px rgba(26, 72, 120, .07);
}

.article-card p,
.side-card p,
.scenario-card p,
.info-row p,
.timeline-card p,
.chapter-row p,
.risk-item p,
.faq-item p {
  margin: 8px 0 0;
  color: var(--muted);
}

.step-grid {
  display: grid;
  gap: 14px;
}

.step-block {
  padding: 18px;
}

.step-block span {
  color: var(--primary);
  font-weight: 820;
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 12px 0 0;
  list-style: none;
}

.check-list li {
  padding-left: 24px;
  position: relative;
  color: var(--muted);
}

.check-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  position: absolute;
  left: 2px;
  top: 12px;
}

.notice-box {
  border-left: 4px solid var(--primary);
  border-radius: 18px;
  padding: 18px;
  background: var(--primary-soft);
  color: #38506a;
}

.download-inline {
  margin-top: 10px;
}

.site-footer {
  margin-top: 56px;
  padding: 42px 0;
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,.82);
}

.footer-inner {
  display: grid;
  gap: 24px;
}

.footer-brand img {
  width: 34px;
  height: 34px;
}

.footer-inner p {
  color: var(--muted);
  max-width: 680px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  color: #486077;
  padding: 7px 0;
  border-bottom: 1px solid transparent;
}

.footer-links a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

@media (min-width: 700px) {
  .header-inner,
  .footer-inner,
  .container {
    width: min(1120px, calc(100% - 48px));
  }

  .scenario-story-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .risk-grid,
  .step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chapter-row {
    grid-template-columns: 92px 1fr auto;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .nav-toggle {
    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;
  }

  .magazine-hero {
    padding-top: 78px;
  }

  .hero-grid,
  .split-section,
  .chapter-index,
  .page-layout {
    grid-template-columns: minmax(0, 1.02fr) minmax(360px, .78fr);
  }

  .story-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 44px;
  }

  .timeline-item:nth-child(even) {
    margin-top: 54px;
  }

  .scenario-story-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .risk-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .product-visual {
    min-height: 520px;
  }

  .status-card.float-left {
    margin-left: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    align-items: start;
  }
}