:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-pale: #F4F8FF;
  --white: #FFFFFF;
  --bg: #F6F8FC;
  --line: #E5EAF2;
  --text: #1F2937;
  --muted: #667085;
  --deep: #111827;
  --shadow: 0 18px 50px rgba(31, 41, 55, .08);
  --radius: 26px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.75;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 18px; color: var(--muted); }
h1, h2, h3 { color: var(--deep); line-height: 1.18; margin: 0 0 18px; letter-spacing: -.03em; }
h1 { font-size: clamp(2.25rem, 8vw, 5.4rem); }
h2 { font-size: clamp(1.65rem, 5vw, 3rem); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229,234,242,.86);
}
.nav-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand, .footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  color: var(--deep);
  white-space: nowrap;
}
.logo, .footer-brand img { width: 38px; height: 38px; object-fit: contain; }
.nav-toggle {
  border: 1px solid var(--line);
  width: 44px;
  height: 42px;
  border-radius: 14px;
  background: var(--white);
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0 11px;
}
.nav-toggle span { height: 2px; background: var(--deep); border-radius: 8px; }
.site-nav {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 78px;
  display: none;
  flex-direction: column;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.site-nav.open { display: flex; }
.site-nav a {
  padding: 11px 13px;
  color: #475467;
  border-radius: 14px;
  font-weight: 700;
  font-size: .96rem;
}
.site-nav a.active, .site-nav a:hover { color: var(--primary); background: var(--primary-soft); }

.content-container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.content-container.narrow { width: min(880px, calc(100% - 32px)); }
.section { padding: 66px 0; }
.gradient-bg {
  background:
    radial-gradient(circle at 12% 18%, rgba(41,128,254,.16), transparent 30%),
    radial-gradient(circle at 88% 10%, rgba(41,128,254,.10), transparent 28%),
    linear-gradient(180deg, #F7FBFF 0%, #FFFFFF 100%);
}
.pale-section { background: linear-gradient(180deg, #F4F8FF 0%, #F7F9FC 100%); }
.eyebrow, .category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(41,128,254,.13);
  font-size: .84rem;
  font-weight: 900;
  margin-bottom: 18px;
}
.section-head { max-width: 760px; margin-bottom: 30px; }
.section-head p { font-size: 1.05rem; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 28px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-weight: 900;
  box-shadow: 0 12px 30px rgba(41,128,254,.26);
  border: 1px solid rgba(41,128,254,.2);
  transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 38px rgba(41,128,254,.32); }
.text-link { color: var(--primary); font-weight: 900; display: inline-flex; align-items: center; gap: 8px; }
.text-link::after { content: "→"; }

.launch-hero {
  width: min(1240px, calc(100% - 28px));
  margin: 18px auto 0;
  border-radius: 30px;
  min-height: calc(100vh - 110px);
  display: grid;
  align-items: center;
  gap: 36px;
  padding: 54px 18px;
  border: 1px solid var(--line);
  overflow: hidden;
  position: relative;
}
.launch-hero::after {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  right: -120px;
  bottom: -120px;
  background: rgba(41,128,254,.12);
}
.hero-copy { position: relative; z-index: 2; }
.hero-copy p { font-size: 1.08rem; max-width: 720px; }
.hero-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.hero-tags span, .mini-checks span {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid var(--line);
  color: #475467;
  font-weight: 800;
  font-size: .88rem;
}
.app-showcase { display: grid; place-items: center; position: relative; z-index: 2; }
.phone-stage {
  width: min(420px, 86vw);
  min-height: 420px;
  display: grid;
  place-items: center;
  position: relative;
  border-radius: 38px;
  background: linear-gradient(160deg, rgba(255,255,255,.94), rgba(234,243,255,.86));
  border: 1px solid rgba(41,128,254,.12);
  box-shadow: var(--shadow);
  padding: 28px;
}
.phone-stage img { max-height: 520px; object-fit: contain; filter: drop-shadow(0 28px 42px rgba(31,41,55,.16)); }
.float-label {
  position: absolute;
  padding: 10px 13px;
  border-radius: 999px;
  background: rgba(255,255,255,.93);
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(31,41,55,.09);
  color: var(--primary);
  font-weight: 900;
  font-size: .82rem;
}
.label-a { left: 8px; top: 12%; }
.label-b { right: 8px; top: 26%; }
.label-c { left: 18px; bottom: 22%; }
.label-d { right: 18px; bottom: 10%; }

.highlight-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.highlight-card, .category-grid a, .risk-card, .step-card, .faq-item, .article-panel, .side-panel, .small-info-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 10px 28px rgba(31,41,55,.04);
}
.highlight-card { padding: 18px; display: flex; flex-direction: column; gap: 6px; }
.highlight-card b, .category-grid b, .risk-card b, .step-card b, .small-info-card b { color: var(--deep); font-size: 1.05rem; }
.highlight-card::before {
  content: "";
  width: 34px;
  height: 4px;
  border-radius: 999px;
  background: var(--primary);
}
.highlight-card span, .small-info-card span { color: var(--muted); font-size: .95rem; }

.big-feature-card {
  display: grid;
  gap: 24px;
  padding: 24px;
  border-radius: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.feature-text { align-self: center; }
.feature-image {
  min-height: 260px;
  border-radius: 26px;
  background: linear-gradient(145deg, var(--primary-soft), var(--white));
  display: grid;
  place-items: center;
  padding: 18px;
  overflow: hidden;
}
.feature-image img { max-height: 430px; object-fit: contain; }
.check-list { list-style: none; padding: 0; margin: 20px 0; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; color: #475467; }
.check-list li::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  position: absolute;
  left: 4px;
  top: .76em;
}
.mini-checks { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 20px; }
.notice-card {
  border-left: 4px solid var(--primary);
  border-radius: 18px;
  background: var(--primary-pale);
  padding: 16px;
  margin: 18px 0;
  color: #344054;
  font-weight: 700;
}

.process-steps { display: grid; gap: 14px; }
.step-card { padding: 20px; }
.step-card span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 15px;
  background: var(--primary);
  color: var(--white);
  font-weight: 900;
  margin-bottom: 14px;
}
.step-card p { margin: 8px 0 0; }
.risk-grid { display: grid; gap: 14px; }
.risk-card { padding: 20px; border-left: 4px solid var(--primary); }
.risk-card p { margin: 8px 0; }
.risk-card em { display: block; color: #475467; font-style: normal; font-weight: 800; }
.app-category-center { position: relative; }
.category-grid { display: grid; gap: 14px; }
.category-grid a { padding: 22px; min-height: 150px; }
.category-grid a p { margin: 10px 0 0; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 0; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 18px 20px; font-weight: 900; color: var(--deep); }
.faq-item p { padding: 0 20px 20px; margin: 0; }
.cta-section {
  text-align: center;
  border-radius: 30px;
  padding: 46px 18px;
  margin-bottom: 66px;
  background: linear-gradient(135deg, #F4F8FF, #FFFFFF);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.cta-section p { max-width: 680px; margin-left: auto; margin-right: auto; }

.page-hero { padding: 70px 0 54px; border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(2rem, 7vw, 4.2rem); }
.page-hero p { font-size: 1.08rem; }
.two-column-page { display: grid; gap: 22px; align-items: start; }
.article-panel, .side-panel { padding: 24px; }
.rich-article p { font-size: 1.03rem; }
.info-card-grid { display: grid; gap: 14px; margin: 26px 0; }
.small-info-card { padding: 18px; display: grid; gap: 7px; }
.related-line { margin-top: 8px; }
.safety-panel { background: linear-gradient(180deg, #FFFFFF, #F7FBFF); }
.number-list { display: grid; gap: 14px; margin: 0; padding: 0; counter-reset: item; list-style: none; }
.number-list li {
  counter-increment: item;
  display: grid;
  gap: 6px;
  padding: 18px 18px 18px 68px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--white);
  position: relative;
}
.number-list li::before {
  content: counter(item, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 18px;
  width: 36px;
  height: 36px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--primary);
  font-weight: 900;
}
.number-list span { color: var(--muted); }

.site-footer {
  background: #F7F9FC;
  border-top: 1px solid var(--line);
  padding: 44px 0 24px;
}
.footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  gap: 28px;
}
.footer-inner p { max-width: 520px; margin-top: 16px; }
.footer-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.footer-links a { color: #475467; font-weight: 750; }
.footer-links a:hover { color: var(--primary); }
.copyright { width: min(1180px, calc(100% - 32px)); margin: 28px auto 0; color: #98A2B3; font-size: .9rem; }

@media (min-width: 640px) {
  .highlight-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .info-card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-links { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    gap: 2px;
    align-items: center;
  }
  .site-nav a { font-size: .9rem; padding: 9px 10px; }
  .launch-hero {
    grid-template-columns: 1.05fr .95fr;
    padding: 76px 56px;
    border-radius: 38px;
  }
  .hero-copy p { font-size: 1.15rem; }
  .highlight-bar { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .big-feature-card { grid-template-columns: 1fr .9fr; padding: 42px; gap: 38px; }
  .big-feature-card.reverse .feature-text { order: 2; }
  .big-feature-card.reverse .feature-image { order: 1; }
  .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .two-column-page { grid-template-columns: minmax(0, 1fr) 330px; }
  .article-panel, .side-panel { padding: 34px; }
  .footer-inner { grid-template-columns: .9fr 1.1fr; align-items: start; }
}

@media (min-width: 1100px) {
  .site-nav a { padding: 10px 12px; }
}

@media (max-width: 420px) {
  .content-container, .content-container.narrow { width: min(100% - 24px, 1180px); }
  .launch-hero { width: calc(100% - 18px); padding: 42px 14px; border-radius: 24px; }
  .phone-stage { min-height: 340px; padding: 16px; }
  .float-label { font-size: .74rem; padding: 8px 10px; }
  .section { padding: 52px 0; }
  .download-btn { width: 100%; }
  .hero-tags span { flex: 1 1 100%; text-align: center; }
}