:root {
  --brand: #2980FE;
  --brand-deep: #1767D6;
  --brand-soft: #EAF3FF;
  --ice: #F5F8FD;
  --surface: #FFFFFF;
  --muted-surface: #F7F9FC;
  --text: #172033;
  --body: #465266;
  --muted: #718096;
  --line: #DCE6F2;
  --footer: #10233F;
  --shadow: 0 18px 48px rgba(23, 103, 214, .10);
  --shadow-soft: 0 10px 28px rgba(16, 35, 63, .07);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --container: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--text); background: var(--surface); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif; line-height: 1.75; overflow-x: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
p { margin: 0 0 1em; color: var(--body); }
h1, h2, h3 { margin: 0 0 .55em; line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: clamp(2.35rem, 5vw, 4.8rem); }
h2 { font-size: clamp(1.8rem, 3.3vw, 3rem); }
h3 { font-size: 1.22rem; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -80px; z-index: 9999; padding: 10px 14px; background: var(--footer); color: #fff; border-radius: 10px; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid rgba(220,230,242,.9); background: rgba(255,255,255,.94); backdrop-filter: blur(16px); }
.nav-shell { width: min(calc(100% - 32px), 1320px); min-height: 76px; margin: auto; display: flex; align-items: center; gap: 24px; }
.brand { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand img { object-fit: contain; }
.desktop-nav { flex: 1; display: flex; align-items: center; justify-content: center; gap: 4px; white-space: nowrap; }
.nav-link { position: relative; display: inline-flex; align-items: center; min-height: 44px; padding: 10px 11px; border-radius: 12px; color: #33415a; font-size: .95rem; font-weight: 700; }
.nav-link:hover, .nav-link:focus-visible, .nav-link.is-active { color: var(--brand-deep); background: var(--brand-soft); outline: none; }
.nav-group { position: relative; }
.mega-menu { position: absolute; left: 50%; top: calc(100% + 12px); width: 680px; padding: 18px; display: grid; grid-template-columns: 1.15fr repeat(2, 1fr); gap: 10px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translate(-50%, 8px); transition: .2s ease; }
.mega-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -14px; height: 14px; }
.nav-group:hover .mega-menu, .nav-group:focus-within .mega-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.mega-menu > a { display: block; padding: 13px; border-radius: 14px; }
.mega-menu > a:hover, .mega-menu > a:focus-visible { background: var(--ice); outline: none; }
.mega-menu b, .mega-menu small { display: block; }
.mega-menu b { color: var(--text); }
.mega-menu small { margin-top: 4px; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.mega-intro { grid-row: span 3; padding: 18px; border-radius: 16px; background: linear-gradient(145deg, var(--brand), var(--brand-deep)); color: #fff; }
.mega-intro strong { display: block; font-size: 1.2rem; }
.mega-intro span { display: block; margin-top: 10px; color: rgba(255,255,255,.85); font-size: .9rem; line-height: 1.65; }
.mega-menu-compact { width: 600px; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 22px; border: 1px solid transparent; border-radius: 14px; font-weight: 800; transition: .2s ease; cursor: pointer; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-deep)); box-shadow: 0 10px 24px rgba(41,128,254,.22); }
.button-secondary { color: var(--brand-deep); border-color: #bdd6fa; background: #fff; }
.button-ghost { color: var(--brand-deep); background: var(--brand-soft); }
.button-small { min-height: 44px; padding: 10px 18px; white-space: nowrap; }
.menu-toggle { width: 46px; height: 46px; border: 1px solid var(--line); border-radius: 14px; background: #fff; display: none; place-items: center; padding: 11px; cursor: pointer; }
.menu-toggle span { display: block; width: 22px; height: 2px; margin: 3px 0; background: var(--text); border-radius: 2px; }
.menu-overlay { position: fixed; inset: 0; z-index: 1100; background: rgba(16,35,63,.48); }
.mobile-menu { position: fixed; top: 0; right: 0; bottom: 0; z-index: 1200; width: min(92vw, 430px); padding: 20px; background: #fff; transform: translateX(105%); transition: transform .25s ease; overflow-y: auto; box-shadow: -20px 0 50px rgba(16,35,63,.18); }
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.menu-close { width: 46px; height: 46px; border: 1px solid var(--line); border-radius: 14px; background: var(--ice); font-size: 1.7rem; line-height: 1; cursor: pointer; }
.mobile-nav { padding: 18px 0; }
.mobile-nav > a, .mobile-nav summary { display: flex; align-items: center; min-height: 52px; padding: 12px 4px; border-bottom: 1px solid var(--line); font-weight: 800; cursor: pointer; }
.mobile-nav summary { justify-content: space-between; list-style: none; }
.mobile-nav summary::-webkit-details-marker { display: none; }
.mobile-nav summary::after { content: "+"; color: var(--brand); font-size: 1.4rem; }
.mobile-nav details[open] summary::after { content: "−"; }
.mobile-nav details div { padding: 8px 0 10px 14px; }
.mobile-nav details a { display: flex; align-items: center; min-height: 46px; color: var(--body); }
.mobile-download { width: 100%; }
body.menu-open { overflow: hidden; }
.section { padding: clamp(72px, 9vw, 118px) 0; }
.section-tight { padding: 56px 0; }
.section-soft { background: var(--ice); }
.section-blue { background: linear-gradient(145deg, #eaf3ff, #f9fbff); }
.section-dark { color: #fff; background: linear-gradient(135deg, var(--footer), #183f72); }
.section-dark p, .section-dark li { color: rgba(255,255,255,.82); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 16px; color: var(--brand-deep); font-size: .86rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 26px; height: 2px; background: currentColor; }
.section-heading { max-width: 760px; margin-bottom: 36px; }
.section-heading.center { margin-inline: auto; text-align: center; }
.section-heading p { font-size: 1.06rem; }
.hero { position: relative; padding: clamp(62px, 8vw, 110px) 0 76px; overflow: hidden; background: radial-gradient(circle at 90% 10%, #ddecff 0, transparent 36%), linear-gradient(180deg, #fff, #f7fbff); }
.hero::after { content: ""; position: absolute; left: -120px; bottom: -170px; width: 420px; height: 420px; border-radius: 50%; border: 70px solid rgba(41,128,254,.05); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 60px; }
.hero-copy p { max-width: 700px; font-size: 1.08rem; }
.hero-actions, .inline-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.pill-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.pill { padding: 8px 12px; border: 1px solid #c9defb; border-radius: 999px; color: #2a5f9f; background: rgba(255,255,255,.8); font-weight: 700; font-size: .86rem; }
.hero-visual { position: relative; min-height: 530px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; inset: 6% 0 3%; border-radius: 42px; background: linear-gradient(145deg, rgba(41,128,254,.14), rgba(255,255,255,.9)); border: 1px solid rgba(41,128,254,.12); transform: rotate(-3deg); }
.hero-visual > img { position: relative; z-index: 2; max-height: 520px; object-fit: contain; filter: drop-shadow(0 22px 34px rgba(16,35,63,.17)); }
.float-note { position: absolute; z-index: 3; max-width: 190px; padding: 13px 15px; border: 1px solid rgba(220,230,242,.9); border-radius: 14px; background: rgba(255,255,255,.92); box-shadow: var(--shadow-soft); font-weight: 800; font-size: .85rem; }
.float-note.n1 { top: 12%; left: -5%; }
.float-note.n2 { right: -3%; top: 43%; }
.float-note.n3 { left: 4%; bottom: 8%; }
.capability-strip { position: relative; z-index: 3; margin-top: -32px; }
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-xl); background: #fff; box-shadow: var(--shadow); }
.capability-item { padding: 26px; }
.capability-item + .capability-item { border-left: 1px solid var(--line); }
.capability-item h2 { font-size: 1.08rem; }
.capability-item p { margin: 0; font-size: .9rem; }
.category-grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-flow: dense; gap: 16px; }
.category-card { min-height: 220px; padding: 28px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-soft); transition: .2s ease; }
.category-card:hover { transform: translateY(-4px); border-color: #b9d5fb; }
.category-card.featured { grid-column: span 2; min-height: 250px; background: linear-gradient(135deg, var(--brand), var(--brand-deep)); color: #fff; }
.category-card.featured p, .category-card.featured .text-link { color: rgba(255,255,255,.86); }
.category-card.wide { grid-column: span 2; }
.category-index { display: inline-grid; place-items: center; width: 38px; height: 38px; margin-bottom: 34px; border-radius: 12px; background: var(--brand-soft); color: var(--brand-deep); font-weight: 900; }
.category-card.featured .category-index { color: #fff; background: rgba(255,255,255,.16); }
.category-card p { flex: 1; }
.text-link { color: var(--brand-deep); font-weight: 900; }
.text-link::after { content: " →"; }
.split { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: clamp(34px, 6vw, 76px); }
.split.reverse .media-panel { order: 2; }
.media-panel { min-height: 430px; display: grid; place-items: center; padding: 28px; border-radius: var(--radius-xl); background: linear-gradient(145deg, #e5f1ff, #fff); border: 1px solid #d6e6fa; }
.media-panel img { max-height: 420px; object-fit: contain; }
.content-panel { padding: clamp(26px, 4vw, 48px); border: 1px solid var(--line); border-radius: var(--radius-xl); background: #fff; box-shadow: var(--shadow-soft); }
.check-list, .plain-list { margin: 22px 0 0; padding: 0; list-style: none; }
.check-list li { position: relative; margin: 12px 0; padding-left: 34px; color: var(--body); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 23px; height: 23px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--brand); font-size: .76rem; font-weight: 900; }
.dual-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 22px; }
.info-block { padding: clamp(28px, 4vw, 48px); border-radius: var(--radius-xl); border: 1px solid var(--line); background: #fff; }
.info-block.offset { margin-top: 54px; background: var(--brand-soft); }
.info-block .number { display: block; margin-bottom: 30px; color: var(--brand); font-size: 2.8rem; font-weight: 900; }
.feature-panels { display: grid; grid-template-columns: 1.12fr .88fr; gap: 22px; }
.feature-panel { padding: clamp(30px, 5vw, 56px); border-radius: var(--radius-xl); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.feature-panel.blue { color: #fff; background: linear-gradient(145deg, var(--brand), var(--brand-deep)); }
.feature-panel.blue p, .feature-panel.blue li, .feature-panel.blue .text-link { color: rgba(255,255,255,.85); }
.feature-panel img { max-height: 250px; margin: 0 auto 24px; object-fit: contain; }
.security-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 42px; align-items: center; }
.security-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.security-list div { padding: 18px; border: 1px solid rgba(255,255,255,.14); border-radius: 16px; background: rgba(255,255,255,.07); }
.swap-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 42px; align-items: center; }
.swap-media { padding: 30px; border-radius: var(--radius-xl); background: var(--brand-soft); }
.swap-media img { max-height: 360px; margin: auto; object-fit: contain; }
.audit-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 26px; }
.audit-list div { padding: 18px; border-radius: 15px; background: var(--ice); border: 1px solid var(--line); font-weight: 800; }
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.step { position: relative; min-height: 270px; padding: 24px 18px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
.step::after { content: ""; position: absolute; top: 40px; right: -15px; width: 15px; height: 2px; background: #b9d6fa; }
.step:last-child::after { display: none; }
.step-number { display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: 24px; border-radius: 14px; color: #fff; background: var(--brand); font-weight: 900; }
.step h3 { min-height: 2.7em; }
.step p { font-size: .91rem; }
.timeline { position: relative; margin: 0; padding: 0; list-style: none; }
.timeline::before { content: ""; position: absolute; left: 112px; top: 12px; bottom: 12px; width: 1px; background: var(--line); }
.timeline li { display: grid; grid-template-columns: 90px 1fr; gap: 44px; padding: 20px 0; }
.timeline time { color: var(--brand-deep); font-weight: 900; }
.timeline article { position: relative; padding: 22px 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.timeline article::before { content: ""; position: absolute; left: -39px; top: 28px; width: 10px; height: 10px; border: 5px solid #fff; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 1px var(--line); }
.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); box-shadow: var(--shadow-soft); }
.review p { margin-bottom: 20px; }
.review span { color: var(--brand-deep); font-weight: 900; }
.faq-list { max-width: 900px; margin: auto; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item button { width: 100%; min-height: 68px; padding: 18px 4px; display: flex; justify-content: space-between; gap: 20px; border: 0; background: transparent; text-align: left; font-weight: 900; cursor: pointer; }
.faq-item button::after { content: "+"; flex: 0 0 auto; color: var(--brand); font-size: 1.5rem; }
.faq-item.is-open button::after { content: "−"; }
.faq-answer { display: none; padding: 0 4px 22px; }
.faq-item.is-open .faq-answer { display: block; }
.cta { padding: clamp(38px, 6vw, 70px); text-align: center; border-radius: 32px; background: linear-gradient(145deg, var(--brand), var(--brand-deep)); color: #fff; box-shadow: 0 24px 60px rgba(41,128,254,.22); }
.cta p { max-width: 720px; margin: 0 auto 26px; color: rgba(255,255,255,.84); }
.cta .button-secondary { border-color: #fff; }
.page-hero { padding: 78px 0 66px; background: radial-gradient(circle at 82% 12%, #dbeaff 0, transparent 35%), linear-gradient(180deg, #fff, #f7fbff); }
.page-hero-grid { display: grid; grid-template-columns: 1fr .72fr; align-items: center; gap: 52px; }
.page-hero h1 { font-size: clamp(2.3rem, 4vw, 4rem); }
.page-hero p { max-width: 720px; font-size: 1.08rem; }
.page-visual { min-height: 320px; display: grid; place-items: center; padding: 28px; border-radius: var(--radius-xl); background: rgba(255,255,255,.82); border: 1px solid var(--line); }
.page-visual img { max-height: 340px; object-fit: contain; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(260px, .7fr); gap: 34px; align-items: start; }
.article-flow > * + * { margin-top: 24px; }
.prose-card { padding: clamp(26px, 4vw, 44px); border: 1px solid var(--line); border-radius: var(--radius-xl); background: #fff; box-shadow: var(--shadow-soft); }
.prose-card h2 { font-size: clamp(1.5rem, 2.5vw, 2.25rem); }
.side-nav { position: sticky; top: 104px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--ice); }
.side-nav h2 { font-size: 1.15rem; }
.side-nav a { display: block; padding: 10px 0; color: var(--body); border-bottom: 1px solid var(--line); font-weight: 700; }
.side-nav a:last-child { border-bottom: 0; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 18px; }
table { width: 100%; border-collapse: collapse; min-width: 620px; background: #fff; }
th, td { padding: 16px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--brand-deep); background: var(--brand-soft); }
.notice { padding: 22px 24px; border-left: 4px solid var(--brand); border-radius: 0 16px 16px 0; background: var(--brand-soft); }
.notice.strong { border-left-color: #ffb020; background: #fff8e8; }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.contact-card { padding: 28px; border-radius: 20px; border: 1px solid var(--line); background: #fff; }
.site-footer { padding: 70px 0 22px; color: #fff; background: var(--footer); }
.footer-grid { display: grid; grid-template-columns: 1.7fr repeat(3, 1fr); gap: 40px; }
.footer-brand p { max-width: 430px; color: rgba(255,255,255,.7); }
.footer-logo { margin-bottom: 20px; filter: brightness(0) invert(1); }
.site-footer h2 { font-size: 1rem; }
.site-footer a { display: block; margin: 8px 0; color: rgba(255,255,255,.72); }
.site-footer a:hover { color: #fff; }
.footer-bottom { margin-top: 48px; padding-top: 22px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid rgba(255,255,255,.12); }
.footer-bottom p { margin: 0; color: rgba(255,255,255,.58); }
.footer-bottom div { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-bottom div a { margin: 0; }
@media (max-width: 1120px) {
  .desktop-nav { display: none; }
  .nav-shell { gap: 16px; }
  .nav-actions { margin-left: auto; }
  .menu-toggle { display: grid; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .step::after { display: none; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.5fr repeat(3, 1fr); gap: 24px; }
}
@media (max-width: 840px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .hero-grid, .split, .dual-grid, .feature-panels, .security-grid, .swap-grid, .page-hero-grid, .content-grid { grid-template-columns: 1fr; }
  .hero-copy { order: 1; }
  .hero-visual { order: 2; min-height: 440px; }
  .float-note.n1 { left: 0; }
  .float-note.n2 { right: 0; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .capability-item + .capability-item { border-left: 0; }
  .capability-item:nth-child(even) { border-left: 1px solid var(--line); }
  .capability-item:nth-child(n+3) { border-top: 1px solid var(--line); }
  .split.reverse .media-panel { order: 0; }
  .info-block.offset { margin-top: 0; }
  .security-list { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .page-visual { order: 2; }
  .side-nav { position: static; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 580px) {
  h1 { font-size: clamp(2.15rem, 12vw, 3.1rem); }
  .nav-shell { width: calc(100% - 20px); min-height: 68px; }
  .brand img { width: 132px; }
  .nav-actions { gap: 7px; }
  .button-small { min-height: 42px; padding: 9px 13px; font-size: .88rem; }
  .menu-toggle { width: 42px; height: 42px; border-radius: 12px; }
  .hero { padding-top: 52px; }
  .hero-actions .button, .inline-actions .button { width: 100%; }
  .hero-visual { min-height: 370px; }
  .hero-visual > img { max-height: 360px; }
  .float-note { max-width: 155px; padding: 10px 11px; font-size: .75rem; }
  .float-note.n1 { top: 7%; }
  .float-note.n2 { top: 46%; }
  .float-note.n3 { bottom: 3%; }
  .capability-strip { margin-top: -16px; }
  .capability-grid, .category-grid, .review-grid, .steps, .audit-list, .contact-grid { grid-template-columns: 1fr; }
  .capability-item:nth-child(even) { border-left: 0; }
  .capability-item + .capability-item { border-top: 1px solid var(--line); }
  .category-card.featured, .category-card.wide { grid-column: span 1; }
  .category-card { min-height: auto; }
  .category-index { margin-bottom: 22px; }
  .media-panel { min-height: 320px; }
  .timeline::before { left: 8px; }
  .timeline li { grid-template-columns: 1fr; gap: 8px; padding-left: 30px; }
  .timeline article::before { left: -31px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}