:root {
  --primary: #2980FE;
  --primary-dark: #1265df;
  --bg: #ffffff;
  --soft: #f5f8fc;
  --soft-blue: #eef6ff;
  --border: #e5edf6;
  --text: #253044;
  --muted: #687386;
  --deep: #172033;
  --shadow: 0 18px 45px rgba(32, 76, 135, .10);
  --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 42%, #ffffff 100%);
  line-height: 1.72;
  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; }
.section { padding: 64px 0; }
.section-soft { background: linear-gradient(180deg, #f7fbff, #ffffff); }
.section-head { max-width: 780px; margin: 0 auto 28px; text-align: center; }
.section-head.left { text-align: left; margin-left: 0; }
.eyebrow, .category-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 12px; border-radius: 999px;
  color: var(--primary); background: #ecf5ff; border: 1px solid #d7eaff;
  font-size: 13px; font-weight: 700; letter-spacing: .04em;
}
h1, h2, h3 { color: var(--deep); line-height: 1.18; margin: 0 0 14px; }
h1 { font-size: clamp(34px, 8vw, 64px); letter-spacing: -0.05em; }
h2 { font-size: clamp(26px, 5vw, 42px); letter-spacing: -0.035em; }
h3 { font-size: 20px; }
p { margin: 0 0 16px; }
.lead { color: var(--muted); font-size: 17px; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.88); backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.header-inner { width: min(1180px, calc(100% - 28px)); margin: 0 auto; min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo, .footer-logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--deep); }
.logo img, .footer-logo img { width: 38px; height: 38px; object-fit: contain; }
.nav-toggle { display: none; }
.nav-toggle-label { width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 14px; display: grid; place-content: center; gap: 5px; cursor: pointer; background: #fff; }
.nav-toggle-label span { width: 20px; height: 2px; background: var(--deep); display: block; border-radius: 99px; }
.main-nav {
  display: none; position: absolute; left: 14px; right: 14px; top: 78px;
  padding: 14px; background: #fff; border: 1px solid var(--border); border-radius: 22px; box-shadow: var(--shadow);
}
.main-nav a { display: block; padding: 12px 14px; color: var(--muted); border-radius: 14px; font-weight: 650; }
.main-nav a.active, .main-nav a:hover { color: var(--primary); background: #eff6ff; }
.nav-toggle:checked ~ .main-nav { display: block; }
.download-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 13px 24px; border-radius: 999px;
  background: var(--primary); color: #fff; font-weight: 800;
  box-shadow: 0 14px 30px rgba(41, 128, 254, .28);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  border: 0; white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 36px rgba(41, 128, 254, .34); }
.text-link { color: var(--primary); font-weight: 800; display: inline-flex; margin-top: 8px; }
.app-hero { position: relative; padding: 58px 0 34px; overflow: hidden; }
.app-hero::before { content: ""; position: absolute; inset: -100px -80px auto auto; width: 420px; height: 420px; background: radial-gradient(circle, rgba(41,128,254,.18), rgba(41,128,254,0) 70%); pointer-events: none; }
.hero-grid { display: grid; gap: 34px; align-items: center; }
.hero-copy { position: relative; z-index: 2; }
.hero-copy .lead { max-width: 620px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin: 26px 0 20px; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span { padding: 8px 12px; border: 1px solid var(--border); background: #fff; border-radius: 999px; color: var(--muted); font-size: 13px; font-weight: 700; }
.app-visual { position: relative; padding: 20px; min-height: 430px; border-radius: 34px; background: linear-gradient(145deg, #f3f8ff, #ffffff); border: 1px solid var(--border); box-shadow: var(--shadow); display: grid; place-items: center; }
.app-visual .phone-img { max-height: 520px; margin: 0 auto; object-fit: contain; filter: drop-shadow(0 24px 38px rgba(22,50,88,.18)); }
.floating-card { background: rgba(255,255,255,.94); border: 1px solid var(--border); border-radius: 18px; box-shadow: 0 12px 30px rgba(39,73,118,.10); padding: 12px 14px; }
.visual-floats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; margin-top: 14px; }
.floating-card strong { display: block; color: var(--deep); font-size: 14px; }
.floating-card span { color: var(--muted); font-size: 12px; }
.ability-bar { display: grid; gap: 12px; margin-top: 34px; }
.ability-item { background: #fff; border: 1px solid var(--border); border-radius: 20px; padding: 18px; box-shadow: 0 10px 26px rgba(27,70,124,.06); }
.ability-item::before { content: ""; display: block; width: 34px; height: 4px; border-radius: 999px; background: var(--primary); margin-bottom: 12px; }
.ability-item h3 { font-size: 17px; margin-bottom: 5px; }
.ability-item p { color: var(--muted); font-size: 14px; margin: 0; }
.feature-showcase { display: grid; gap: 18px; }
.feature-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); overflow: hidden; }
.feature-card img { height: 220px; width: 100%; object-fit: contain; margin-top: 10px; background: linear-gradient(135deg,#f6faff,#eef6ff); border-radius: 18px; padding: 10px; }
.feature-card p { color: var(--muted); }
.product-section { display: grid; gap: 26px; align-items: center; padding: 34px; border: 1px solid var(--border); border-radius: 30px; background: #fff; box-shadow: var(--shadow); }
.product-section.reverse { background: linear-gradient(135deg, #f5f9ff, #ffffff); }
.product-section img { border-radius: 24px; background: #f7fbff; border: 1px solid var(--border); padding: 12px; max-height: 390px; object-fit: contain; margin: 0 auto; }
.info-list { display: grid; gap: 12px; margin: 18px 0; }
.info-list li, .check-list li { list-style: none; position: relative; padding-left: 30px; color: var(--muted); margin-bottom: 8px; }
.info-list li::before, .check-list li::before { content: ""; position: absolute; left: 0; top: .72em; width: 10px; height: 10px; background: var(--primary); border-radius: 50%; box-shadow: 0 0 0 5px #eaf3ff; }
.panel-note { border-left: 4px solid var(--primary); background: #f3f8ff; padding: 16px; border-radius: 16px; color: var(--muted); }
.process-steps { display: grid; gap: 14px; }
.step-card { background: #fff; border: 1px solid var(--border); border-radius: 22px; padding: 20px; box-shadow: 0 10px 24px rgba(31,73,123,.06); }
.step-num { width: 36px; height: 36px; border-radius: 12px; background: var(--primary); color: #fff; display: inline-grid; place-items: center; font-weight: 900; margin-bottom: 12px; }
.step-card p { color: var(--muted); }
.risk-grid, .ecosystem-grid, .faq-grid, .article-grid { display: grid; gap: 16px; }
.risk-card, .eco-card, .faq-item, .side-card, .summary-card { background: #fff; border: 1px solid var(--border); border-radius: 22px; padding: 20px; box-shadow: 0 10px 24px rgba(31,73,123,.06); }
.risk-card { border-top: 4px solid var(--primary); }
.risk-card p, .eco-card p, .faq-item p, .side-card p, .summary-card p { color: var(--muted); }
.cta-section { text-align: center; padding: 52px 24px; border-radius: 34px; background: linear-gradient(135deg, #eff7ff, #ffffff 58%, #f4f8ff); border: 1px solid var(--border); box-shadow: var(--shadow); }
.cta-section p { max-width: 720px; margin: 0 auto 22px; color: var(--muted); }
.page-hero { padding: 54px 0 28px; }
.page-hero-card { padding: 30px; background: linear-gradient(135deg, #f2f8ff, #ffffff); border: 1px solid var(--border); border-radius: 30px; box-shadow: var(--shadow); }
.page-hero-card h1 { font-size: clamp(32px, 6vw, 52px); }
.article-wrap { width: min(1060px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 68px; }
.article-layout { display: grid; gap: 20px; align-items: start; }
.content-card { background: #fff; border: 1px solid var(--border); border-radius: 28px; padding: 24px; box-shadow: var(--shadow); }
.content-card h2 { font-size: 26px; margin-top: 8px; }
.content-card p { color: #49566b; }
.tip-box { background: #f5f9ff; border: 1px solid #dcecff; border-radius: 20px; padding: 18px; margin: 20px 0; }
.tip-box strong { color: var(--deep); display: block; margin-bottom: 8px; }
.inline-grid { display: grid; gap: 12px; margin: 20px 0; }
.mini-card { background: #fbfdff; border: 1px solid var(--border); border-radius: 18px; padding: 16px; }
.mini-card h3 { font-size: 17px; }
.mini-card p { margin: 0; color: var(--muted); }
.download-panel { margin-top: 22px; padding: 22px; border-radius: 24px; background: linear-gradient(135deg, #eef6ff, #ffffff); border: 1px solid var(--border); text-align: center; }
.download-panel p { color: var(--muted); margin-bottom: 18px; }
.download-flow { counter-reset: flow; display: grid; gap: 14px; margin: 22px 0; }
.download-flow li { list-style: none; counter-increment: flow; background: #fff; border: 1px solid var(--border); border-radius: 18px; padding: 16px 16px 16px 58px; position: relative; color: var(--muted); }
.download-flow li::before { content: counter(flow); position: absolute; left: 16px; top: 16px; width: 28px; height: 28px; border-radius: 10px; display: grid; place-items: center; background: var(--primary); color: #fff; font-weight: 900; }
.site-footer { background: #f6f8fb; border-top: 1px solid var(--border); padding-top: 46px; }
.footer-grid { display: grid; gap: 28px; }
.site-footer p { color: var(--muted); max-width: 420px; }
.site-footer h3 { font-size: 16px; margin-bottom: 12px; }
.site-footer a:not(.footer-logo) { display: block; color: var(--muted); margin: 8px 0; }
.site-footer a:hover { color: var(--primary); }
.footer-bottom { margin-top: 34px; border-top: 1px solid var(--border); padding: 18px; text-align: center; color: var(--muted); font-size: 14px; }
@media (min-width: 640px) {
  .ability-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-showcase, .ecosystem-grid, .risk-grid, .inline-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .section { padding: 84px 0; }
  .nav-toggle-label { display: none; }
  .main-nav { display: flex; position: static; padding: 0; border: 0; box-shadow: none; background: transparent; gap: 4px; align-items: center; }
  .main-nav a { padding: 9px 11px; font-size: 14px; }
  .hero-grid { grid-template-columns: 1.02fr .98fr; }
  .app-hero { padding: 84px 0 42px; }
  .visual-floats { position: absolute; inset: auto 18px 18px 18px; grid-template-columns: repeat(2, 1fr); }
  .ability-bar { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .feature-showcase { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-section { grid-template-columns: 1fr 1fr; padding: 44px; }
  .product-section.reverse .product-image { order: -1; }
  .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .ecosystem-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 310px; }
  .footer-grid { grid-template-columns: 1.4fr .8fr .8fr .8fr; }
}
@media (max-width: 420px) {
  .container, .article-wrap { width: min(100% - 24px, 1120px); }
  .product-section, .page-hero-card, .content-card { padding: 20px; border-radius: 22px; }
  .download-btn { width: 100%; }
  .visual-floats { grid-template-columns: 1fr; }
}