:root {
  --blue: #2980FE;
  --blue-dark: #1767D6;
  --blue-soft: #EAF3FF;
  --blue-faint: #F5F8FD;
  --gray: #F7F9FC;
  --white: #FFFFFF;
  --ink: #172033;
  --text: #465266;
  --muted: #718096;
  --line: #DCE6F2;
  --footer: #10233F;
  --shadow: 0 16px 48px rgba(23, 103, 214, .10);
  --radius: 22px;
  --max: 1200px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--white); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif; line-height: 1.75; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.skip-link { position: fixed; left: 16px; top: -80px; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: 10px; z-index: 9999; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.94); backdrop-filter: blur(18px); border-bottom: 1px solid rgba(220,230,242,.8); }
.header-shell { width: min(var(--max), calc(100% - 40px)); min-height: 76px; margin: auto; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; min-width: 150px; }
.brand img { object-fit: contain; }
.desktop-nav { display: flex; justify-content: center; align-items: center; gap: 18px; white-space: nowrap; }
.desktop-nav > a, .nav-group > a { color: var(--ink); font-size: 15px; font-weight: 700; padding: 25px 0; position: relative; }
.desktop-nav a.is-active::after, .desktop-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: 16px; height: 2px; background: var(--blue); border-radius: 99px; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--blue-dark); }
.nav-group { position: relative; }
.mega-menu { position: absolute; top: calc(100% - 8px); left: 50%; transform: translate(-50%, 12px); width: 680px; padding: 20px; display: grid; grid-template-columns: 1.05fr 1fr 1fr; gap: 10px; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; pointer-events: none; transition: .18s ease; }
.mega-menu-right { left: auto; right: -120px; transform: translateY(12px); }
.nav-group:hover .mega-menu, .nav-group:focus-within .mega-menu { opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 0); }
.nav-group:hover .mega-menu-right, .nav-group:focus-within .mega-menu-right { transform: translateY(0); }
.mega-menu > a { padding: 13px 14px; border-radius: 14px; color: var(--text); }
.mega-menu > a:hover, .mega-menu > a:focus-visible { background: var(--blue-soft); color: var(--blue-dark); }
.mega-menu b, .mega-menu small { display: block; }
.mega-menu b { color: var(--ink); font-size: 15px; }
.mega-menu small { margin-top: 3px; color: var(--muted); font-size: 12px; line-height: 1.45; }
.mega-copy { grid-row: span 2; padding: 18px; border-radius: 16px; background: linear-gradient(145deg, var(--blue), var(--blue-dark)); color: #fff; }
.mega-copy strong, .mega-copy span { display: block; }
.mega-copy strong { font-size: 20px; }
.mega-copy span { margin-top: 8px; font-size: 13px; line-height: 1.6; opacity: .88; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.download-btn { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 10px 20px; border-radius: 999px; background: linear-gradient(135deg, var(--blue), var(--blue-dark)); color: #fff; font-weight: 800; box-shadow: 0 10px 24px rgba(41,128,254,.22); white-space: nowrap; }
.download-btn:hover, .download-btn:focus-visible { transform: translateY(-1px); box-shadow: 0 14px 30px rgba(41,128,254,.28); }
.more-toggle, .mobile-toggle { min-width: 44px; min-height: 44px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 999px; font-weight: 700; }
.more-toggle { padding: 0 16px; }
.mobile-toggle { display: none; width: 44px; padding: 0 12px; }
.mobile-toggle span { height: 2px; background: var(--ink); display: block; margin: 4px 0; border-radius: 99px; }
.more-panel { position: absolute; right: max(20px, calc((100% - var(--max)) / 2)); top: 70px; width: 210px; padding: 10px; background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
.more-panel a { display: block; padding: 11px 12px; border-radius: 10px; font-weight: 700; color: var(--ink); }
.more-panel a:hover { background: var(--blue-soft); color: var(--blue-dark); }
.drawer-overlay { position: fixed; inset: 0; z-index: 1100; background: rgba(16,35,63,.48); opacity: 0; transition: .18s ease; }
.drawer-overlay.is-visible { opacity: 1; }
.mobile-drawer { position: fixed; z-index: 1200; top: 0; right: 0; bottom: 0; width: min(92vw, 430px); background: #fff; transform: translateX(105%); transition: .24s ease; overflow-y: auto; box-shadow: -24px 0 60px rgba(16,35,63,.18); }
.mobile-drawer.is-open { transform: translateX(0); }
.drawer-head { min-height: 76px; display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.drawer-close { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; background: #fff; color: var(--ink); font-size: 30px; line-height: 1; }
.mobile-nav { padding: 14px 18px; }
.mobile-home, .mobile-nav-group > button { min-height: 50px; width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 10px 4px; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 800; text-align: left; }
.mobile-nav-group > div { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 10px 0 16px; }
.mobile-nav-group > div a { min-height: 44px; display: flex; align-items: center; padding: 10px 12px; border-radius: 12px; background: var(--blue-faint); color: var(--text); font-weight: 700; }
.drawer-cta { padding: 0 18px 24px; }
.drawer-cta .download-btn { width: 100%; }
main { min-height: 65vh; }
.container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
.section { padding: 92px 0; }
.section-sm { padding: 62px 0; }
.section-soft { background: var(--blue-faint); }
.section-blue { background: linear-gradient(145deg, #0F5FC4, #2980FE); color: #fff; }
.section-heading { max-width: 760px; margin-bottom: 38px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue-dark); background: var(--blue-soft); padding: 6px 12px; border-radius: 999px; font-size: 13px; font-weight: 800; letter-spacing: .06em; }
.section-blue .eyebrow { color: #fff; background: rgba(255,255,255,.14); }
h1, h2, h3 { color: var(--ink); line-height: 1.25; margin-top: 0; }
h1 { font-size: clamp(40px, 5.5vw, 72px); letter-spacing: -.04em; margin-bottom: 22px; }
h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.03em; margin-bottom: 18px; }
h3 { font-size: 22px; margin-bottom: 10px; }
p { margin-top: 0; }
.lead { font-size: clamp(17px, 2vw, 21px); color: var(--text); }
.section-blue h2, .section-blue h3, .section-blue .lead, .section-blue p { color: #fff; }
.text-link { color: var(--blue-dark); font-weight: 800; }
.text-link:hover { text-decoration: underline; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button-secondary { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 10px 18px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink); font-weight: 800; }
.hero { position: relative; overflow: hidden; padding: 78px 0 52px; background: radial-gradient(circle at 80% 20%, rgba(41,128,254,.16), transparent 32%), linear-gradient(180deg, #fff, #F5F8FD); }
.hero::before { content: ""; position: absolute; width: 460px; height: 460px; border: 1px solid rgba(41,128,254,.15); border-radius: 50%; right: -180px; top: -140px; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; gap: 56px; }
.hero-copy { max-width: 680px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.hero-tags span { padding: 8px 13px; border: 1px solid var(--line); background: rgba(255,255,255,.78); border-radius: 999px; color: var(--ink); font-weight: 700; font-size: 14px; }
.hero-visual { min-height: 540px; position: relative; display: grid; place-items: center; }
.hero-device { width: min(100%, 420px); filter: drop-shadow(0 28px 46px rgba(41,128,254,.18)); }
.float-note { position: absolute; padding: 13px 16px; border: 1px solid rgba(220,230,242,.9); border-radius: 16px; background: rgba(255,255,255,.9); backdrop-filter: blur(12px); box-shadow: var(--shadow); color: var(--ink); font-weight: 800; font-size: 14px; }
.float-note.one { top: 16%; left: -2%; }
.float-note.two { right: -1%; top: 46%; }
.float-note.three { left: 8%; bottom: 9%; }
.capability-strip { position: relative; margin-top: -1px; }
.capability-grid { display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid var(--line); background: #fff; border-radius: 22px; overflow: hidden; box-shadow: 0 14px 42px rgba(23,103,214,.07); }
.capability-grid article { padding: 24px; border-right: 1px solid var(--line); }
.capability-grid article:last-child { border: 0; }
.capability-grid h2 { font-size: 19px; margin-bottom: 6px; }
.capability-grid p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.category-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.category-card { min-height: 230px; padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: #fff; display: flex; flex-direction: column; justify-content: space-between; transition: .18s ease; }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(41,128,254,.35); }
.category-card.featured { grid-column: span 3; background: linear-gradient(145deg, var(--blue), var(--blue-dark)); }
.category-card.featured h3, .category-card.featured p, .category-card.featured a { color: #fff; }
.category-card:nth-child(n+2):nth-child(-n+4) { grid-column: span 1; }
.category-card:nth-child(n+5):nth-child(-n+7) { grid-column: span 2; }
.category-card:nth-child(8) { grid-column: span 1; }
.category-card:nth-child(9) { grid-column: span 2; }
.category-card:nth-child(10) { grid-column: span 3; }
.category-card.wide { background: var(--blue-soft); }
.category-card p { color: var(--muted); }
.category-card a { color: var(--blue-dark); font-weight: 800; }
.media-panel { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 58px; padding: 48px; border-radius: 30px; background: var(--blue-soft); }
.media-panel .image-box { min-height: 460px; display: grid; place-items: center; border-radius: 24px; background: rgba(255,255,255,.74); overflow: hidden; }
.media-panel .image-box img { max-height: 430px; object-fit: contain; }
.check-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 32px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 900; font-size: 13px; }
.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: stretch; }
.topic-panel { padding: 36px; border: 1px solid var(--line); border-radius: 26px; background: #fff; }
.topic-panel.offset { margin-top: 46px; background: var(--blue-faint); }
.topic-panel p { color: var(--muted); }
.topic-panel ul { padding-left: 20px; }
.dual-feature { display: grid; grid-template-columns: 1.1fr .9fr; gap: 22px; align-items: stretch; }
.feature-large, .feature-side { padding: 38px; border-radius: 28px; overflow: hidden; }
.feature-large { background: linear-gradient(145deg, #fff, var(--blue-soft)); border: 1px solid var(--line); }
.feature-side { background: var(--blue-dark); color: #fff; }
.feature-side h3, .feature-side p, .feature-side a { color: #fff; }
.feature-large img { max-height: 340px; margin: 18px auto 0; object-fit: contain; }
.security-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center; }
.security-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.security-points div { padding: 15px; border-radius: 14px; background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.15); font-weight: 700; }
.hardware-grid, .swap-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: center; }
.hardware-grid img, .swap-grid img { max-height: 460px; margin: auto; object-fit: contain; }
.swap-checks { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
.swap-checks div { padding: 13px 15px; border: 1px solid var(--line); border-radius: 13px; background: #fff; font-weight: 700; color: var(--ink); }
.steps { display: grid; grid-template-columns: repeat(6,1fr); gap: 12px; }
.step { position: relative; padding: 22px 18px; border-top: 3px solid var(--blue); background: #fff; border-radius: 0 0 16px 16px; box-shadow: 0 12px 28px rgba(23,103,214,.07); }
.step span { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--blue-soft); color: var(--blue-dark); font-weight: 900; }
.step h3 { margin-top: 16px; font-size: 17px; }
.step p { color: var(--muted); font-size: 13px; }
.step a { color: var(--blue-dark); font-weight: 800; font-size: 13px; }
.notice-list { border-top: 1px solid var(--line); }
.notice-item { display: grid; grid-template-columns: 150px 1fr auto; gap: 24px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--line); }
.notice-item time { color: var(--muted); font-weight: 700; }
.notice-item h3 { font-size: 18px; margin: 0 0 4px; }
.notice-item p { margin: 0; color: var(--muted); }
.notice-item a { color: var(--blue-dark); font-weight: 800; }
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.review { padding: 24px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.review p { margin-bottom: 0; color: var(--text); }
.review strong { display: block; color: var(--blue-dark); margin-bottom: 10px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: 16px; background: #fff; overflow: hidden; }
.faq-item > button { width: 100%; min-height: 58px; padding: 16px 20px; border: 0; background: #fff; color: var(--ink); display: flex; align-items: center; justify-content: space-between; text-align: left; font-weight: 800; }
.faq-item > button::after { content: "+"; font-size: 22px; color: var(--blue-dark); }
.faq-item > button[aria-expanded="true"]::after { content: "−"; }
.faq-answer { padding: 0 20px 20px; color: var(--muted); }
.cta-band { padding: 58px; border-radius: 30px; text-align: center; background: radial-gradient(circle at 20% 20%, rgba(255,255,255,.18), transparent 32%), linear-gradient(145deg, var(--blue), var(--blue-dark)); color: #fff; }
.cta-band h2, .cta-band p { color: #fff; }
.cta-band .download-btn { background: #fff; color: var(--blue-dark); box-shadow: none; }
.page-hero { padding: 82px 0 62px; background: linear-gradient(180deg, var(--blue-faint), #fff); }
.page-hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 42px; align-items: center; }
.page-hero h1 { font-size: clamp(38px,5vw,62px); }
.page-hero .hero-art { min-height: 310px; border-radius: 30px; background: linear-gradient(145deg, var(--blue), var(--blue-dark)); display: grid; place-items: center; color: #fff; padding: 36px; overflow: hidden; }
.page-hero .hero-art img { max-height: 320px; object-fit: contain; }
.page-hero .hero-art strong { font-size: 46px; line-height: 1.15; letter-spacing: -.04em; }
.content-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 32px; }
.prose { max-width: 820px; }
.prose p { color: var(--text); }
.info-box { padding: 26px; border-radius: 20px; background: var(--blue-soft); border: 1px solid rgba(41,128,254,.14); }
.info-box h3 { color: var(--blue-dark); }
.card-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.info-card { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.info-card p { color: var(--muted); }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; }
table { border-collapse: collapse; width: 100%; min-width: 680px; background: #fff; }
th, td { text-align: left; padding: 16px 18px; border-bottom: 1px solid var(--line); }
th { background: var(--blue-faint); color: var(--ink); }
.timeline { position: relative; display: grid; gap: 18px; }
.timeline::before { content: ""; position: absolute; left: 18px; top: 12px; bottom: 12px; width: 2px; background: var(--line); }
.timeline article { position: relative; padding: 22px 22px 22px 58px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.timeline article::before { content: ""; position: absolute; left: 11px; top: 27px; width: 16px; height: 16px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 6px var(--blue-soft); }
.contact-options { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.contact-option { padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.site-footer { background: var(--footer); color: rgba(255,255,255,.72); padding: 64px 0 24px; }
.footer-shell { width: min(var(--max), calc(100% - 40px)); margin: auto; display: grid; grid-template-columns: 1.6fr repeat(3,1fr); gap: 44px; }
.site-footer .brand img { filter: brightness(0) invert(1); }
.footer-brand p { max-width: 440px; margin-top: 18px; }
.site-footer h2 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.site-footer section > a:not(.brand) { display: block; margin: 8px 0; font-size: 14px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { width: min(var(--max), calc(100% - 40px)); margin: 42px auto 0; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.13); display: flex; justify-content: space-between; gap: 20px; font-size: 13px; }
.footer-bottom nav { display: flex; gap: 18px; }
@media (max-width: 1120px) {
  .desktop-nav { gap: 11px; }
  .desktop-nav > a, .nav-group > a { font-size: 14px; }
  .more-toggle { display: none; }
}
@media (max-width: 980px) {
  .header-shell { grid-template-columns: 1fr auto; }
  .desktop-nav, .more-toggle { display: none; }
  .mobile-toggle { display: block; }
  .hero-grid, .page-hero-grid, .media-panel, .security-grid, .hardware-grid, .swap-grid, .content-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 460px; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .capability-grid article:nth-child(2) { border-right: 0; }
  .capability-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .category-card, .category-card.featured, .category-card.wide, .category-card:nth-child(n) { grid-column: span 1; }
  .dual-feature { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(3,1fr); }
  .review-grid, .card-grid, .contact-options { grid-template-columns: 1fr 1fr; }
  .footer-shell { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-shell section:last-child { grid-column: 2 / 4; }
}
@media (max-width: 680px) {
  .container, .header-shell, .footer-shell, .footer-bottom { width: min(100% - 28px, var(--max)); }
  .header-shell { min-height: 68px; gap: 10px; }
  .brand { min-width: 0; }
  .brand img { max-width: 132px; }
  .header-actions { gap: 7px; }
  .header-actions .download-btn { min-height: 42px; padding: 8px 14px; font-size: 14px; }
  .mobile-toggle { width: 42px; min-width: 42px; min-height: 42px; }
  .section { padding: 68px 0; }
  .section-sm { padding: 48px 0; }
  h1 { font-size: clamp(38px, 13vw, 52px); }
  h2 { font-size: clamp(28px, 9vw, 38px); }
  .hero { padding-top: 50px; }
  .hero-grid { gap: 28px; }
  .hero-visual { min-height: 370px; }
  .hero-device { max-height: 360px; object-fit: contain; }
  .float-note { position: static; display: inline-flex; margin: 6px 4px; font-size: 12px; padding: 9px 11px; }
  .hero-visual { display: flex; flex-wrap: wrap; justify-content: center; align-content: center; }
  .hero-device { flex-basis: 100%; }
  .capability-grid, .category-grid, .split-grid, .security-points, .swap-checks, .review-grid, .card-grid, .contact-options { grid-template-columns: 1fr; }
  .capability-grid article { border-right: 0; border-bottom: 1px solid var(--line); }
  .capability-grid article:last-child { border-bottom: 0; }
  .category-card { min-height: 210px; }
  .media-panel { padding: 24px; border-radius: 22px; }
  .media-panel .image-box { min-height: 320px; }
  .topic-panel.offset { margin-top: 0; }
  .steps { grid-template-columns: 1fr; }
  .notice-item { grid-template-columns: 1fr; gap: 5px; }
  .cta-band { padding: 38px 22px; }
  .page-hero { padding: 56px 0 44px; }
  .page-hero .hero-art { min-height: 220px; }
  .page-hero .hero-art strong { font-size: 36px; }
  .footer-shell { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-shell section:last-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
}