:root {
    --brand: #2980FE;
    --brand-dark: #1767D6;
    --brand-soft: #EAF3FF;
    --bg-soft: #F5F8FD;
    --bg-gray: #F7F9FC;
    --white: #FFFFFF;
    --text: #172033;
    --body: #465266;
    --muted: #718096;
    --border: #DCE6F2;
    --footer: #10233F;
    --shadow: 0 18px 45px rgba(23, 103, 214, .10);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
    --container: min(1180px, calc(100% - 40px));
}
* { 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: 1.7; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea { font: inherit; }
button { color: inherit; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 9999; background: var(--footer); color: #fff; padding: 10px 16px; border-radius: 10px; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.94); backdrop-filter: blur(14px); border-bottom: 1px solid rgba(220,230,242,.85); }
.header-shell { width: var(--container); min-height: 76px; margin: 0 auto; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; position: relative; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 146px; max-height: 42px; object-fit: contain; object-position: left center; }
.desktop-nav { display: flex; align-items: center; justify-content: center; gap: 4px; min-width: 0; white-space: nowrap; }
.nav-item { position: relative; }
.nav-link { display: inline-flex; min-height: 44px; align-items: center; padding: 0 11px; border-radius: 12px; color: var(--body); font-size: 15px; font-weight: 700; transition: .2s ease; }
.nav-link:hover, .nav-link:focus-visible, .nav-link.is-active { color: var(--brand-dark); background: var(--brand-soft); outline: none; }
.mega-menu { position: absolute; top: calc(100% + 12px); left: 50%; width: 620px; transform: translate(-50%, 8px); display: grid; grid-template-columns: 190px 1fr; gap: 18px; padding: 18px; background: #fff; border: 1px solid var(--border); border-radius: 20px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; pointer-events: none; transition: .18s ease; }
.has-mega:hover .mega-menu, .has-mega:focus-within .mega-menu { opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 0); }
.mega-intro { padding: 16px; border-radius: 16px; background: linear-gradient(145deg, var(--brand-soft), #fff); }
.mega-intro strong { display: block; margin-top: 8px; font-size: 15px; line-height: 1.6; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--brand-dark); font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.mega-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.mega-links a { padding: 12px 14px; border-radius: 12px; border: 1px solid transparent; }
.mega-links a:hover, .mega-links a:focus-visible { border-color: var(--border); background: var(--bg-soft); outline: none; }
.mega-links span, .mega-links small { display: block; }
.mega-links span { font-weight: 800; }
.mega-links small { color: var(--muted); }
.header-actions { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.download-btn, .primary-btn, .secondary-btn, .text-button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; padding: 0 20px; border-radius: 14px; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.download-btn, .primary-btn { color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-dark)); box-shadow: 0 12px 28px rgba(41,128,254,.24); }
.download-btn:hover, .primary-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(41,128,254,.30); }
.secondary-btn { border: 1px solid var(--border); color: var(--brand-dark); background: #fff; }
.secondary-btn:hover { background: var(--brand-soft); }
.text-button { color: var(--brand-dark); background: var(--brand-soft); }
.more-button, .menu-button, .menu-close { min-width: 46px; min-height: 46px; border: 1px solid var(--border); border-radius: 14px; background: #fff; cursor: pointer; font-weight: 800; }
.menu-button { display: none; padding: 11px; }
.menu-button span { display: block; height: 2px; margin: 5px 0; background: var(--text); border-radius: 2px; }
.more-panel { position: absolute; right: 0; top: calc(100% - 4px); width: 190px; padding: 10px; border: 1px solid var(--border); border-radius: 16px; background: #fff; box-shadow: var(--shadow); }
.more-panel a { display: block; padding: 10px 12px; border-radius: 10px; font-weight: 700; }
.more-panel a:hover { background: var(--bg-soft); color: var(--brand-dark); }
.menu-overlay { position: fixed; inset: 0; z-index: 1100; background: rgba(16,35,63,.46); opacity: 0; transition: opacity .18s ease; }
.menu-overlay.is-visible { opacity: 1; }
.mobile-menu { position: fixed; top: 0; right: 0; z-index: 1200; width: min(92vw, 440px); height: 100vh; overflow-y: auto; background: #fff; transform: translateX(105%); transition: transform .22s ease; box-shadow: -20px 0 50px rgba(16,35,63,.18); }
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu-head { min-height: 76px; display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.mobile-menu-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 18px; }
.mobile-nav { padding: 0 18px 28px; }
.mobile-home, .mobile-group-toggle, .mobile-group-links a { min-height: 48px; display: flex; align-items: center; width: 100%; }
.mobile-home { padding: 0 14px; border-radius: 12px; background: var(--bg-soft); font-weight: 800; }
.mobile-group { border-bottom: 1px solid var(--border); }
.mobile-group-toggle { justify-content: space-between; padding: 0 4px; background: transparent; border: 0; cursor: pointer; font-weight: 800; }
.mobile-group-links { padding: 0 0 12px; }
.mobile-group-links a { padding: 0 14px; border-radius: 10px; color: var(--body); }
.mobile-group-links a:hover { background: var(--brand-soft); color: var(--brand-dark); }
main { overflow: clip; }
.container { width: var(--container); margin: 0 auto; }
.section { padding: 92px 0; }
.section-sm { padding: 64px 0; }
.section-soft { background: var(--bg-soft); }
.section-blue { background: linear-gradient(135deg, var(--brand-soft), #fafdff 55%, #fff); }
.section-dark { color: #fff; background: linear-gradient(135deg, var(--footer), #174b85); }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.section-heading.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-heading h2, .inner-hero h1, .hero h1 { margin: 10px 0 16px; line-height: 1.12; letter-spacing: -.03em; }
.section-heading h2 { font-size: clamp(30px, 4vw, 48px); }
.section-heading p, .hero-copy > p, .inner-hero p { color: var(--body); font-size: 18px; }
.section-dark .section-heading p, .section-dark p { color: rgba(255,255,255,.82); }
.hero { padding: 88px 0 72px; background: radial-gradient(circle at 70% 20%, rgba(41,128,254,.14), transparent 32%), linear-gradient(180deg, #fff, var(--bg-soft)); }
.hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; gap: 58px; }
.hero h1 { max-width: 730px; font-size: clamp(44px, 6vw, 76px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; }
.tag { display: inline-flex; align-items: center; min-height: 36px; padding: 0 13px; border: 1px solid var(--border); border-radius: 999px; color: var(--brand-dark); background: rgba(255,255,255,.86); font-weight: 700; }
.hero-visual { position: relative; min-height: 560px; display: grid; place-items: center; }
.hero-visual::before { content: ''; position: absolute; width: 420px; height: 420px; border-radius: 50%; background: linear-gradient(145deg, rgba(41,128,254,.18), rgba(255,255,255,.7)); filter: blur(1px); }
.hero-visual > img { position: relative; z-index: 2; max-height: 520px; object-fit: contain; filter: drop-shadow(0 28px 30px rgba(23,103,214,.16)); }
.float-note { position: absolute; z-index: 3; min-width: 170px; padding: 14px 16px; border: 1px solid rgba(220,230,242,.9); border-radius: 16px; background: rgba(255,255,255,.88); backdrop-filter: blur(12px); box-shadow: var(--shadow); font-weight: 800; }
.float-note small { display: block; color: var(--muted); font-weight: 600; }
.note-a { top: 12%; left: -2%; }
.note-b { right: -3%; top: 38%; }
.note-c { left: 7%; bottom: 8%; }
.capability-strip { margin-top: -22px; position: relative; z-index: 5; }
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--border); border-radius: 22px; background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.capability-item { padding: 25px; }
.capability-item + .capability-item { border-left: 1px solid var(--border); }
.capability-item strong { display: block; margin-bottom: 6px; font-size: 18px; }
.capability-item p { margin: 0; color: var(--muted); font-size: 14px; }
.category-layout { display: grid; grid-template-columns: repeat(12, 1fr); grid-auto-flow: dense; gap: 18px; }
.category-card { min-height: 230px; display: flex; flex-direction: column; justify-content: space-between; padding: 26px; border: 1px solid var(--border); border-radius: 22px; background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.category-card.featured { grid-column: span 6; background: linear-gradient(145deg, var(--brand), var(--brand-dark)); color: #fff; }
.category-card.row-one { grid-column: span 2; }
.category-card.row-two { grid-column: span 4; }
.category-card.row-three-small { grid-column: span 2; }
.category-card.wide { grid-column: span 5; background: linear-gradient(145deg, #fff, var(--brand-soft)); }
.category-card h3 { margin: 0 0 10px; font-size: 23px; }
.category-card p { margin: 0; color: var(--body); }
.category-card.featured p { color: rgba(255,255,255,.85); }
.more-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 20px; color: var(--brand-dark); font-weight: 800; }
.featured .more-link { color: #fff; }
.split-feature, .offset-grid, .dual-grid, .ecosystem-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 46px; }
.visual-panel { min-height: 520px; display: grid; place-items: center; padding: 34px; border-radius: var(--radius-lg); background: linear-gradient(145deg, var(--brand-soft), #fff); overflow: hidden; }
.visual-panel img { max-height: 460px; object-fit: contain; }
.content-panel { padding: 36px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.check-list, .plain-list, .icon-list { list-style: none; padding: 0; margin: 24px 0 0; }
.check-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.check-list li, .plain-list li, .icon-list li { position: relative; padding-left: 28px; color: var(--body); }
.check-list li::before, .plain-list li::before, .icon-list li::before { content: '✓'; position: absolute; left: 0; top: 0; color: var(--brand); font-weight: 900; }
.offset-card { padding: 34px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); }
.offset-card:nth-child(2) { margin-top: 74px; background: var(--brand-soft); }
.topic-card { padding: 34px; border-radius: var(--radius-lg); border: 1px solid var(--border); background: #fff; }
.topic-card.large { min-height: 430px; }
.topic-card.compact { min-height: 350px; margin-top: 70px; background: linear-gradient(145deg, var(--brand-soft), #fff); }
.media-topic { display: grid; grid-template-columns: .9fr 1.1fr; gap: 38px; align-items: center; }
.media-topic img { max-height: 440px; margin: 0 auto; object-fit: contain; }
.security-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 38px; align-items: start; }
.security-note { padding: 24px; border-radius: 20px; background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.18); }
.security-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 24px; }
.security-list span { padding: 13px 15px; border-radius: 14px; background: rgba(255,255,255,.09); }
.swap-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 42px; align-items: center; }
.swap-visual { padding: 28px; border-radius: var(--radius-lg); background: linear-gradient(145deg, var(--brand-soft), #fff); }
.swap-visual img { max-height: 390px; margin: 0 auto; object-fit: contain; }
.process { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.process-step { position: relative; padding: 24px 18px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.step-number { width: 40px; height: 40px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 50%; color: #fff; background: var(--brand); font-weight: 900; }
.process-step h3 { font-size: 18px; line-height: 1.35; }
.process-step p { color: var(--muted); font-size: 14px; }
.ecosystem-panel { min-height: 350px; padding: 34px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); }
.ecosystem-panel:nth-child(2) { background: linear-gradient(145deg, var(--brand-soft), #fff); }
.timeline { display: grid; gap: 14px; }
.timeline-item { display: grid; grid-template-columns: 120px 1fr auto; gap: 22px; align-items: center; padding: 20px 22px; border: 1px solid var(--border); border-radius: 18px; background: #fff; }
.timeline-date { color: var(--brand-dark); font-weight: 800; }
.timeline-item h3 { margin: 0; font-size: 19px; }
.timeline-item p { margin: 4px 0 0; color: var(--muted); }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review { padding: 26px; border-radius: 20px; border: 1px solid var(--border); background: #fff; }
.review p { margin: 0; color: var(--body); }
.review strong { display: block; margin-top: 18px; color: var(--brand-dark); }
.faq-list { display: grid; gap: 12px; max-width: 900px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: 18px; background: #fff; overflow: hidden; }
.faq-question { width: 100%; min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 20px; border: 0; background: transparent; cursor: pointer; text-align: left; font-weight: 800; }
.faq-question::after { content: '＋'; color: var(--brand); font-size: 22px; }
.faq-item.is-open .faq-question::after { content: '－'; }
.faq-answer { padding: 0 20px 20px; color: var(--body); }
.cta-box { padding: 58px; border-radius: 30px; text-align: center; color: #fff; background: radial-gradient(circle at 20% 20%, rgba(255,255,255,.18), transparent 30%), linear-gradient(135deg, var(--brand), var(--brand-dark)); }
.cta-box p { max-width: 720px; margin: 0 auto 24px; color: rgba(255,255,255,.86); }
.cta-box .download-btn { background: #fff; color: var(--brand-dark); box-shadow: none; }
.inner-hero { padding: 82px 0 64px; background: radial-gradient(circle at 78% 10%, rgba(41,128,254,.15), transparent 26%), linear-gradient(180deg, #fff, var(--bg-soft)); }
.inner-hero-grid { display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; gap: 40px; }
.inner-hero h1 { font-size: clamp(40px, 5vw, 64px); }
.inner-hero-visual { min-height: 360px; display: grid; place-items: center; padding: 28px; border-radius: var(--radius-lg); background: linear-gradient(145deg, var(--brand-soft), #fff); }
.inner-hero-visual img { max-height: 320px; object-fit: contain; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 14px; }
.content-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; align-items: start; }
.prose-card, .list-card, .info-card { padding: 32px; border: 1px solid var(--border); border-radius: 24px; background: #fff; }
.prose-card h2, .list-card h2, .info-card h2 { margin-top: 0; }
.info-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.info-card { min-height: 220px; }
.info-card p { color: var(--body); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step-card { padding: 26px; border: 1px solid var(--border); border-radius: 20px; background: #fff; }
.notice { padding: 24px; border-left: 4px solid var(--brand); border-radius: 0 18px 18px 0; background: var(--brand-soft); color: var(--body); }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 18px; }
table { width: 100%; border-collapse: collapse; min-width: 680px; background: #fff; }
th, td { padding: 16px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--brand-dark); background: var(--bg-soft); }
.site-footer { color: rgba(255,255,255,.84); background: var(--footer); }
.footer-shell { width: var(--container); display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; margin: 0 auto; padding: 66px 0 44px; }
.footer-brand img { width: 158px; max-height: 44px; object-fit: contain; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 520px; }
.footer-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-columns strong, .footer-columns a { display: block; }
.footer-columns strong { margin-bottom: 12px; color: #fff; }
.footer-columns a { padding: 5px 0; }
.footer-columns a:hover { color: #fff; }
.footer-bottom { width: var(--container); display: flex; justify-content: space-between; gap: 30px; margin: 0 auto; padding: 22px 0; border-top: 1px solid rgba(255,255,255,.12); font-size: 14px; }
.footer-bottom p { margin: 0; }
@media (max-width: 1120px) {
    .desktop-nav { display: none; }
    .header-shell { grid-template-columns: auto 1fr auto; }
    .header-actions { grid-column: 3; }
    .menu-button { display: inline-block; }
    .more-button { display: none; }
    .process { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
    :root { --container: min(100% - 32px, 760px); }
    .section { padding: 74px 0; }
    .hero-grid, .inner-hero-grid, .split-feature, .offset-grid, .dual-grid, .ecosystem-grid, .security-grid, .swap-grid, .media-topic, .content-grid { grid-template-columns: 1fr; }
    .hero-visual { min-height: 480px; }
    .capability-grid { grid-template-columns: repeat(2, 1fr); }
    .capability-item:nth-child(3) { border-left: 0; border-top: 1px solid var(--border); }
    .capability-item:nth-child(4) { border-top: 1px solid var(--border); }
    .category-layout { grid-template-columns: repeat(2, 1fr); }
    .category-card.row-one, .category-card.row-two, .category-card.row-three-small { grid-column: span 1; }
    .category-card.featured, .category-card.wide { grid-column: span 2; }
    .offset-card:nth-child(2), .topic-card.compact { margin-top: 0; }
    .review-grid, .info-cards, .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .timeline-item { grid-template-columns: 100px 1fr; }
    .timeline-item .more-link { grid-column: 2; margin-top: 0; }
    .footer-shell { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    :root { --container: calc(100% - 24px); }
    .site-header .brand img { width: 120px; }
    .header-shell { min-height: 68px; gap: 10px; }
    .header-actions { gap: 7px; }
    .header-actions .download-btn { min-height: 42px; padding: 0 14px; font-size: 14px; }
    .menu-button { min-width: 42px; min-height: 42px; }
    .hero { padding: 58px 0 56px; }
    .hero-grid { gap: 26px; }
    .hero h1 { font-size: clamp(38px, 12vw, 52px); }
    .hero-copy > p, .inner-hero p, .section-heading p { font-size: 16px; }
    .hero-actions { display: grid; grid-template-columns: 1fr; }
    .hero-actions a { width: 100%; }
    .hero-visual { min-height: 430px; padding: 20px 0; }
    .hero-visual::before { width: 320px; height: 320px; }
    .hero-visual > img { max-height: 390px; }
    .float-note { position: static; min-width: 0; padding: 12px 13px; }
    .hero-visual { grid-template-columns: 1fr 1fr; gap: 10px; align-content: end; }
    .hero-visual > img { grid-column: 1 / -1; grid-row: 1; }
    .note-c { grid-column: 1 / -1; }
    .capability-strip { margin-top: 0; }
    .capability-grid { grid-template-columns: 1fr; }
    .capability-item + .capability-item, .capability-item:nth-child(3), .capability-item:nth-child(4) { border-left: 0; border-top: 1px solid var(--border); }
    .section { padding: 62px 0; }
    .section-sm { padding: 48px 0; }
    .section-heading h2 { font-size: 34px; }
    .category-layout { grid-template-columns: 1fr; }
    .category-card.featured, .category-card.row-one, .category-card.row-two, .category-card.row-three-small, .category-card.wide { grid-column: span 1; }
    .category-card { min-height: 210px; }
    .visual-panel { min-height: 380px; padding: 24px; }
    .content-panel, .offset-card, .topic-card, .ecosystem-panel, .prose-card, .list-card, .info-card { padding: 24px; }
    .check-list, .security-list { grid-template-columns: 1fr; }
    .process { grid-template-columns: 1fr; }
    .review-grid, .info-cards, .steps-grid { grid-template-columns: 1fr; }
    .timeline-item { grid-template-columns: 1fr; gap: 8px; }
    .timeline-item .more-link { grid-column: auto; }
    .cta-box { padding: 40px 22px; }
    .footer-columns { grid-template-columns: 1fr 1fr; }
    .footer-bottom { flex-direction: column; }
    .inner-hero { padding: 58px 0 48px; }
    .inner-hero h1 { font-size: 42px; }
}