:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-light: #F4F8FF;
  --text: #182237;
  --muted: #667085;
  --soft: #F7F9FC;
  --line: #E6ECF5;
  --white: #FFFFFF;
  --dark: #202B3D;
  --shadow: 0 18px 45px rgba(41, 128, 254, 0.10);
  --soft-shadow: 0 12px 34px rgba(24, 34, 55, 0.08);
  --radius-lg: 32px;
  --radius-md: 24px;
  --radius-sm: 18px;
}
* { 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: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 42%, #FFFFFF 100%);
  line-height: 1.72;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.content-container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; min-height: 74px; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.02em; color: var(--dark); }
.logo { width: 38px; height: 38px; border-radius: 12px; object-fit: cover; box-shadow: 0 8px 22px rgba(41,128,254,.18); }
.site-nav { display: none; flex-direction: column; position: absolute; left: 16px; right: 16px; top: 74px; padding: 12px; border: 1px solid var(--line); border-radius: 20px; background: var(--white); box-shadow: var(--soft-shadow); }
.site-nav.is-open { display: flex; }
.site-nav a { padding: 12px 14px; border-radius: 14px; color: #3E4A5E; font-size: 15px; }
.site-nav a:hover { background: var(--primary-soft); color: var(--primary); }
.nav-toggle { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 14px; background: var(--white); display: inline-flex; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-toggle span { width: 18px; height: 2px; border-radius: 99px; background: var(--dark); }
.section { padding: 72px 0; }
.section-tight { padding: 42px 0; }
.eyebrow, .category-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-weight: 700; font-size: 14px; }
.section-title { font-size: clamp(28px, 5vw, 46px); line-height: 1.16; margin: 16px 0 12px; letter-spacing: -0.045em; }
.section-lead { color: var(--muted); max-width: 760px; margin: 0; }
.download-btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 26px; border-radius: 999px; background: var(--primary); color: #fff; font-weight: 800; box-shadow: 0 16px 30px rgba(41,128,254,.24); transition: transform .22s ease, box-shadow .22s ease; }
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 20px 40px rgba(41,128,254,.30); }
.launch-hero { position: relative; padding: 78px 0 48px; background: radial-gradient(circle at 82% 16%, rgba(41,128,254,.15), transparent 30%), linear-gradient(180deg, #FFFFFF 0%, #F3F8FF 100%); overflow: hidden; }
.launch-hero::after { content: ""; position: absolute; width: 520px; height: 520px; border-radius: 50%; right: -180px; bottom: -220px; background: rgba(41,128,254,.08); }
.launch-grid { position: relative; z-index: 1; display: grid; gap: 34px; align-items: center; }
.launch-copy h1 { font-size: clamp(38px, 9vw, 76px); line-height: .98; letter-spacing: -0.07em; margin: 18px 0; }
.launch-copy p { color: #516071; font-size: 17px; margin: 0 0 24px; max-width: 650px; }
.hero-tags, .mini-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.hero-tags span, .mini-tags span { padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.84); color: #435064; font-size: 14px; }
.hero-visual { position: relative; min-height: 420px; display: grid; place-items: center; }
.app-showcase { position: relative; width: min(360px, 82vw); padding: 20px; border-radius: 38px; background: linear-gradient(145deg, #FFFFFF, #EDF5FF); box-shadow: 0 28px 70px rgba(41,128,254,.18); }
.app-showcase img { border-radius: 30px; width: 100%; object-fit: contain; }
.float-label { position: static; display: inline-flex; align-items: center; gap: 8px; margin: 8px 8px 0 0; padding: 10px 14px; border-radius: 999px; background: var(--white); border: 1px solid var(--line); box-shadow: var(--soft-shadow); color: #354052; font-size: 14px; font-weight: 700; }
.float-label::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.highlight-bar { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: 28px; }
.highlight-item { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 20px; box-shadow: 0 10px 26px rgba(24,34,55,.04); position: relative; overflow: hidden; }
.highlight-item::before { content: ""; position: absolute; left: 20px; top: 0; width: 42px; height: 4px; border-radius: 999px; background: var(--primary); }
.highlight-item h3 { margin: 8px 0 6px; font-size: 18px; }
.highlight-item p { margin: 0 0 12px; color: var(--muted); font-size: 15px; }
.text-link { color: var(--primary); font-weight: 800; }
.big-feature-card { display: grid; gap: 28px; align-items: center; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); box-shadow: var(--shadow); margin-bottom: 26px; overflow: hidden; }
.big-feature-card.soft { background: linear-gradient(145deg, #F7FAFF, #FFFFFF); }
.big-feature-card .feature-image { border-radius: 28px; background: var(--primary-light); border: 1px solid var(--line); padding: 18px; min-height: 280px; display: grid; place-items: center; }
.big-feature-card .feature-image img { max-height: 370px; object-fit: contain; }
.feature-copy h2 { font-size: clamp(26px, 5vw, 42px); line-height: 1.16; letter-spacing: -0.04em; margin: 12px 0; }
.feature-copy p { color: var(--muted); margin: 0 0 18px; }
.check-list { list-style: none; padding: 0; margin: 18px 0; display: grid; gap: 10px; }
.check-list li { position: relative; padding: 12px 14px 12px 38px; border-radius: 16px; background: var(--primary-light); color: #344054; }
.check-list li::before { content: "✓"; position: absolute; left: 14px; top: 11px; color: var(--primary); font-weight: 900; }
.process-steps { display: grid; gap: 14px; margin-top: 28px; counter-reset: step; }
.process-card { background: var(--white); border: 1px solid var(--line); border-radius: 24px; padding: 22px; box-shadow: 0 12px 30px rgba(24,34,55,.05); position: relative; }
.process-card .num { width: 42px; height: 42px; border-radius: 14px; background: var(--primary); color: white; display: grid; place-items: center; font-weight: 900; margin-bottom: 16px; }
.process-card h3 { margin: 0 0 6px; }
.process-card p { margin: 0 0 12px; color: var(--muted); }
.risk-grid { display: grid; gap: 14px; margin-top: 28px; }
.risk-card { border: 1px solid var(--line); border-left: 4px solid var(--primary); background: var(--white); border-radius: 22px; padding: 20px; box-shadow: 0 10px 26px rgba(24,34,55,.04); }
.risk-card h3 { margin: 0 0 8px; }
.risk-card p { margin: 0 0 10px; color: var(--muted); }
.risk-card strong { color: var(--dark); }
.app-category-center { display: grid; gap: 14px; margin-top: 28px; }
.category-card { padding: 22px; border-radius: 24px; background: linear-gradient(180deg, #FFFFFF, #F8FBFF); border: 1px solid var(--line); box-shadow: 0 10px 30px rgba(24,34,55,.04); }
.category-card .icon-dot { width: 36px; height: 36px; border-radius: 14px; background: var(--primary-soft); display: grid; place-items: center; color: var(--primary); font-weight: 900; margin-bottom: 14px; }
.category-card h3 { margin: 0 0 8px; }
.category-card p { color: var(--muted); margin: 0 0 12px; font-size: 15px; }
.faq-list { display: grid; gap: 14px; margin-top: 28px; }
.faq-item { background: var(--white); border: 1px solid var(--line); border-radius: 22px; padding: 20px; box-shadow: 0 10px 26px rgba(24,34,55,.04); }
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section { padding: 64px 0; }
.cta-panel { text-align: center; border-radius: 36px; border: 1px solid var(--line); padding: 38px 22px; background: radial-gradient(circle at top, rgba(41,128,254,.12), transparent 45%), linear-gradient(145deg, #FFFFFF, #F2F7FF); box-shadow: var(--shadow); }
.cta-panel h2 { font-size: clamp(28px, 5vw, 46px); line-height: 1.16; letter-spacing: -0.04em; margin: 0 0 12px; }
.cta-panel p { color: var(--muted); margin: 0 auto 24px; max-width: 680px; }
.page-hero { padding: 70px 0 34px; background: linear-gradient(180deg, #FFFFFF 0%, #F5F9FF 100%); }
.page-hero h1 { font-size: clamp(34px, 7vw, 58px); line-height: 1.08; letter-spacing: -0.055em; margin: 16px 0 14px; max-width: 880px; }
.page-hero p { color: var(--muted); max-width: 760px; margin: 0; font-size: 17px; }
.article-layout { display: grid; gap: 22px; align-items: start; }
.article-main { display: grid; gap: 20px; }
.info-panel, .safety-panel, .guide-card { background: var(--white); border: 1px solid var(--line); border-radius: 26px; padding: 24px; box-shadow: 0 12px 30px rgba(24,34,55,.05); }
.info-panel h2, .safety-panel h2, .guide-card h2 { margin: 0 0 12px; font-size: 24px; letter-spacing: -0.02em; }
.info-panel p, .safety-panel p, .guide-card p { color: var(--muted); margin-top: 0; }
.aside-stack { display: grid; gap: 14px; }
.tip-box { border-radius: 24px; background: var(--primary-light); border: 1px solid #DCEBFF; padding: 20px; }
.tip-box h3 { margin: 0 0 8px; }
.tip-box p { margin: 0; color: var(--muted); }
.notice-strip { padding: 18px 20px; border-radius: 22px; border: 1px solid #DCEBFF; background: linear-gradient(90deg, #F4F8FF, #FFFFFF); color: #445065; }
.steps-list { display: grid; gap: 12px; padding: 0; margin: 18px 0 0; list-style: none; }
.steps-list li { padding: 16px; border-radius: 18px; border: 1px solid var(--line); background: #FCFDFF; }
.steps-list strong { color: var(--primary); display: block; margin-bottom: 4px; }
.download-page-grid { display: grid; gap: 22px; }
.download-primary { text-align: center; padding: 32px; border-radius: 32px; border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
.download-primary h2 { margin-top: 0; }
.site-footer { margin-top: 40px; background: #F6F8FC; border-top: 1px solid var(--line); padding: 44px 0 24px; }
.footer-grid { display: grid; gap: 24px; }
.footer-grid p { color: var(--muted); max-width: 420px; }
.footer-grid h3 { margin: 0 0 10px; font-size: 16px; }
.footer-grid a:not(.brand) { display: block; color: #5E6B7E; margin: 8px 0; font-size: 14px; }
.footer-bottom { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); color: #7A8699; font-size: 14px; }
.footer-brand { margin-bottom: 12px; }
@media (min-width: 640px) {
  .highlight-bar { grid-template-columns: repeat(2, 1fr); }
  .risk-grid { grid-template-columns: repeat(2, 1fr); }
  .app-category-center { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav { position: static; display: flex; flex-direction: row; align-items: center; width: auto; padding: 0; border: 0; box-shadow: none; background: transparent; }
  .site-nav a { padding: 9px 10px; font-size: 14px; }
  .launch-grid { grid-template-columns: 1.02fr .98fr; }
  .hero-visual { min-height: 560px; }
  .float-label { position: absolute; margin: 0; }
  .float-label.one { left: 4%; top: 18%; }
  .float-label.two { right: 2%; top: 25%; }
  .float-label.three { left: 0; bottom: 24%; }
  .float-label.four { right: 8%; bottom: 15%; }
  .highlight-bar { grid-template-columns: repeat(3, 1fr); }
  .big-feature-card { grid-template-columns: 1fr 1fr; padding: 36px; }
  .big-feature-card.reverse .feature-image { order: -1; }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .risk-grid { grid-template-columns: repeat(4, 1fr); }
  .app-category-center { grid-template-columns: repeat(4, 1fr); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 320px; }
  .download-page-grid { grid-template-columns: .9fr 1.1fr; align-items: start; }
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
}
@media (min-width: 1180px) {
  .site-nav a { padding: 9px 13px; }
}
@media (max-width: 420px) {
  .content-container { width: min(100% - 24px, 1120px); }
  .section { padding: 54px 0; }
  .launch-hero { padding-top: 52px; }
  .big-feature-card { padding: 20px; border-radius: 26px; }
  .download-btn { width: 100%; }
  .site-nav { left: 12px; right: 12px; }
}