:root {
    --brand: #2980FE;
    --brand-deep: #1767D6;
    --brand-soft: #EAF3FF;
    --blue-gray: #F5F8FD;
    --gray: #F7F9FC;
    --white: #FFFFFF;
    --text: #172033;
    --body: #465266;
    --muted: #718096;
    --border: #DCE6F2;
    --footer: #10233F;
    --shadow: 0 18px 55px rgba(37, 85, 149, .11);
    --shadow-soft: 0 10px 35px rgba(36, 78, 137, .08);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --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", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    line-height: 1.72;
    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; top: 8px; left: 8px; z-index: 9999; transform: translateY(-160%);
    padding: 10px 16px; border-radius: 10px; background: var(--footer); color: var(--white);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
    position: sticky; top: 0; z-index: 1000;
    border-bottom: 1px solid rgba(220, 230, 242, .88);
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(16px);
}
.header-shell {
    width: var(--container); height: 78px; margin: 0 auto;
    display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 24px;
}
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: auto; max-height: 44px; object-fit: contain; }
.desktop-nav { display: flex; justify-content: center; align-items: center; gap: 3px; min-width: 0; }
.nav-link {
    display: inline-flex; align-items: center; min-height: 44px; padding: 0 11px;
    border-radius: 12px; color: #344157; font-size: 14px; font-weight: 700; white-space: nowrap;
}
.nav-link:hover, .nav-link:focus-visible, .nav-link.is-active, .nav-item.is-active > .nav-link { color: var(--brand); background: var(--brand-soft); }
.nav-item { position: relative; }
.mega-menu {
    position: absolute; top: calc(100% + 13px); left: 50%; transform: translateX(-46%);
    width: 720px; padding: 20px; border: 1px solid var(--border); border-radius: 24px;
    background: var(--white); box-shadow: var(--shadow); display: grid; grid-template-columns: 230px 1fr; gap: 18px;
    opacity: 0; visibility: hidden; pointer-events: none; transition: .18s ease;
}
.mega-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -16px; height: 18px; }
.mega-menu-compact { width: 660px; }
.mega-menu-narrow { width: 600px; }
.nav-item:hover .mega-menu, .nav-item:focus-within .mega-menu { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-46%) translateY(0); }
.mega-intro { padding: 18px; border-radius: 18px; background: linear-gradient(145deg, var(--brand-soft), #f8fbff); }
.eyebrow { display: inline-block; color: var(--brand); font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.mega-intro strong { display: block; margin-top: 8px; font-size: 18px; line-height: 1.45; }
.mega-intro p { margin: 8px 0 0; color: var(--body); font-size: 13px; line-height: 1.7; }
.mega-links { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; }
.mega-links a { padding: 13px 14px; border-radius: 14px; transition: .18s ease; }
.mega-links a:hover, .mega-links a:focus-visible { background: var(--blue-gray); transform: translateY(-1px); }
.mega-links strong { display: block; font-size: 14px; }
.mega-links span { display: block; margin-top: 3px; color: var(--muted); font-size: 12px; }
.header-actions { display: flex; align-items: center; gap: 9px; }
.download-btn {
    display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px;
    border: 1px solid transparent; border-radius: 14px; background: linear-gradient(135deg, var(--brand), var(--brand-deep));
    color: var(--white); font-weight: 800; box-shadow: 0 10px 25px rgba(41,128,254,.23); transition: .18s ease;
}
.download-btn:hover, .download-btn:focus-visible { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(41,128,254,.30); }
.icon-button {
    width: 44px; height: 44px; padding: 0; border: 1px solid var(--border); border-radius: 13px;
    background: var(--white); display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.icon-button span { width: 17px; height: 2px; border-radius: 2px; background: var(--text); transition: .18s ease; }
.icon-button:hover, .icon-button:focus-visible { border-color: #a8c8f2; background: var(--brand-soft); }
.mobile-menu-toggle { display: none; }
.more-panel {
    position: absolute; top: 70px; right: max(20px, calc((100% - 1180px)/2)); width: min(470px, calc(100vw - 40px));
    padding: 18px; border: 1px solid var(--border); border-radius: 22px; background: var(--white); box-shadow: var(--shadow);
    grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px;
}
.more-panel:not([hidden]) { display: grid; }
.more-panel > div { grid-column: 1 / -1; padding: 8px 10px 12px; }
.more-panel > div strong { display: block; margin-top: 3px; }
.more-panel a { padding: 13px; border-radius: 14px; background: var(--blue-gray); font-weight: 700; }
.more-panel a span { display: block; margin-top: 3px; color: var(--muted); font-size: 12px; font-weight: 500; }
.mobile-overlay, .mobile-menu { display: none; }

main { overflow: clip; }
.container { width: var(--container); margin-inline: auto; }
.section { padding: 96px 0; }
.section-sm { padding: 72px 0; }
.section-soft { background: var(--blue-gray); }
.section-blue { background: linear-gradient(145deg, #edf5ff, #f9fbff); }
.section-dark { background: linear-gradient(135deg, #102d56, #16477e); color: var(--white); }
.section-title { max-width: 760px; margin-bottom: 36px; }
.section-title.center { margin-inline: auto; text-align: center; }
.section-title h2 { margin: 10px 0 14px; font-size: clamp(30px, 4vw, 48px); line-height: 1.18; letter-spacing: -.035em; }
.section-title p { margin: 0; color: var(--body); font-size: 17px; }
.section-dark .section-title p, .section-dark .muted { color: rgba(255,255,255,.75); }
.kicker { color: var(--brand); font-weight: 800; letter-spacing: .08em; font-size: 13px; text-transform: uppercase; }
.lead { font-size: 18px; color: var(--body); }
.muted { color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--brand); font-weight: 800; }
.text-link::after { content: "→"; transition: transform .18s ease; }
.text-link:hover::after { transform: translateX(4px); }
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 28px; }
.button-secondary {
    display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 21px;
    border: 1px solid var(--border); border-radius: 14px; background: var(--white); color: var(--text); font-weight: 800;
}
.button-secondary:hover, .button-secondary:focus-visible { border-color: #9dc5f7; color: var(--brand); }

.hero { position: relative; padding: 88px 0 76px; background: radial-gradient(circle at 82% 10%, rgba(41,128,254,.16), transparent 32%), linear-gradient(180deg, #f9fcff 0%, #fff 78%); }
.hero::after { content: ""; position: absolute; right: -120px; top: 140px; width: 320px; height: 320px; border: 1px solid rgba(41,128,254,.14); border-radius: 50%; }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.12fr) minmax(380px,.88fr); gap: 62px; align-items: center; }
.hero-copy h1 { max-width: 720px; margin: 12px 0 18px; font-size: clamp(44px, 6vw, 76px); line-height: 1.03; letter-spacing: -.055em; }
.hero-copy p { max-width: 690px; margin: 0; color: var(--body); font-size: 18px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 25px; }
.hero-tags span { padding: 8px 13px; border: 1px solid #cfe1f8; border-radius: 999px; background: rgba(255,255,255,.82); color: #37618f; font-size: 13px; font-weight: 700; }
.hero-visual { position: relative; min-height: 520px; display: flex; align-items: center; justify-content: center; }
.hero-image-panel { width: min(410px, 100%); padding: 28px; border: 1px solid rgba(255,255,255,.82); border-radius: 36px; background: linear-gradient(150deg, rgba(255,255,255,.95), rgba(233,244,255,.88)); box-shadow: var(--shadow); }
.hero-image-panel img { width: 100%; max-height: 460px; object-fit: contain; }
.float-note { position: absolute; min-width: 160px; padding: 13px 15px; border: 1px solid rgba(207,225,248,.9); border-radius: 15px; background: rgba(255,255,255,.96); box-shadow: var(--shadow-soft); }
.float-note strong { display: block; font-size: 13px; }
.float-note span { display: block; margin-top: 2px; color: var(--muted); font-size: 12px; }
.float-one { top: 54px; left: -10px; }
.float-two { right: -18px; top: 198px; }
.float-three { left: 20px; bottom: 45px; }

.capability-strip { position: relative; z-index: 4; margin-top: -28px; }
.capability-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); border: 1px solid var(--border); border-radius: 22px; background: var(--white); box-shadow: var(--shadow-soft); overflow: hidden; }
.capability-item { position: relative; padding: 24px; }
.capability-item + .capability-item::before { content: ""; position: absolute; left: 0; top: 24px; bottom: 24px; width: 1px; background: var(--border); }
.capability-item strong { display: block; font-size: 17px; }
.capability-item p { margin: 7px 0 0; color: var(--body); font-size: 14px; }

.category-grid { display: grid; grid-template-columns: repeat(12, minmax(0,1fr)); gap: 16px; }
.category-card { min-height: 210px; padding: 25px; border: 1px solid var(--border); border-radius: 22px; background: var(--white); box-shadow: 0 8px 28px rgba(37,85,149,.05); transition: .18s ease; }
.category-card:hover { transform: translateY(-4px); border-color: #b8d3f5; box-shadow: var(--shadow-soft); }
.category-card.featured { background: linear-gradient(135deg, var(--brand), #4c9cff); color: var(--white); }
.category-card:nth-child(1) { grid-column: span 6; }
.category-card:nth-child(2), .category-card:nth-child(3), .category-card:nth-child(4) { grid-column: span 2; }
.category-card:nth-child(5), .category-card:nth-child(6), .category-card:nth-child(7) { grid-column: span 4; }
.category-card:nth-child(8) { grid-column: span 3; }
.category-card:nth-child(9) { grid-column: span 4; }
.category-card:nth-child(10) { grid-column: span 5; }
.category-card:nth-child(2) h3, .category-card:nth-child(3) h3, .category-card:nth-child(4) h3 { font-size: 19px; }
.category-card:nth-child(2) p, .category-card:nth-child(3) p, .category-card:nth-child(4) p { font-size: 13px; }
.category-card .category-no { color: var(--brand); font-size: 13px; font-weight: 900; }
.category-card.featured .category-no, .category-card.featured p, .category-card.featured .text-link { color: rgba(255,255,255,.86); }
.category-card h3 { margin: 13px 0 9px; font-size: 23px; }
.category-card p { margin: 0 0 18px; color: var(--body); font-size: 14px; }

.split-feature { display: grid; grid-template-columns: minmax(340px,.9fr) minmax(0,1.1fr); gap: 58px; align-items: center; }
.split-feature.reverse { grid-template-columns: minmax(0,1.05fr) minmax(340px,.95fr); }
.split-feature.reverse .visual-panel { order: 2; }
.visual-panel { min-height: 460px; padding: 34px; border-radius: 30px; background: linear-gradient(145deg, #ddecff, #f8fbff); display: flex; align-items: center; justify-content: center; }
.visual-panel img { width: 100%; max-height: 430px; object-fit: contain; }
.content-panel h2 { margin: 10px 0 16px; font-size: clamp(32px, 4vw, 50px); line-height: 1.15; letter-spacing: -.035em; }
.content-panel p { color: var(--body); }
.check-list { display: grid; gap: 10px; padding: 0; margin: 24px 0 0; list-style: none; }
.check-list li { position: relative; padding: 12px 15px 12px 42px; border-radius: 13px; background: var(--white); border: 1px solid var(--border); color: #334159; }
.check-list li::before { content: "✓"; position: absolute; left: 15px; top: 12px; color: var(--brand); font-weight: 900; }

.dual-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.topic-panel { padding: 34px; border: 1px solid var(--border); border-radius: 26px; background: var(--white); }
.topic-panel.offset { margin-top: 38px; }
.topic-panel h3 { margin: 10px 0 14px; font-size: 30px; line-height: 1.2; }
.topic-panel p { color: var(--body); }
.topic-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin: 22px 0 0; padding: 0; list-style: none; }
.topic-list li { padding: 11px 13px; border-radius: 12px; background: var(--blue-gray); color: #35455d; font-size: 14px; }

.dapp-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 22px; align-items: stretch; }
.dapp-primary, .dapp-secondary { border-radius: 28px; overflow: hidden; }
.dapp-primary { padding: 38px; background: linear-gradient(145deg, #eef6ff, #fff); border: 1px solid var(--border); }
.dapp-primary .dapp-image { margin-top: 28px; height: 300px; }
.dapp-primary img { width: 100%; height: 100%; object-fit: contain; }
.dapp-secondary { padding: 38px; background: var(--footer); color: var(--white); }
.dapp-secondary p { color: rgba(255,255,255,.75); }
.dapp-secondary .check-list li { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.13); color: var(--white); }

.safety-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 44px; align-items: start; }
.safety-statement { position: sticky; top: 115px; padding: 30px; border: 1px solid rgba(255,255,255,.14); border-radius: 24px; background: rgba(255,255,255,.07); }
.safety-statement h2 { margin: 10px 0 14px; font-size: 42px; line-height: 1.12; }
.safety-statement p { color: rgba(255,255,255,.76); }
.safety-list { display: grid; gap: 12px; }
.safety-item { padding: 22px 23px; border-radius: 18px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.13); }
.safety-item strong { display: block; font-size: 17px; }
.safety-item p { margin: 6px 0 0; color: rgba(255,255,255,.72); font-size: 14px; }

.swap-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 42px; align-items: center; }
.swap-visual { padding: 32px; border-radius: 28px; background: linear-gradient(145deg, #e8f2ff, #fff); }
.swap-visual img { max-height: 400px; margin: 0 auto; object-fit: contain; }
.preflight { padding: 31px; border: 1px solid var(--border); border-radius: 26px; background: var(--white); }
.preflight-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin-top: 22px; }
.preflight-grid div { padding: 14px; border-radius: 13px; background: var(--blue-gray); font-weight: 700; font-size: 14px; }

.steps-flow { display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 12px; counter-reset: step; }
.flow-step { position: relative; padding: 23px 18px; border: 1px solid var(--border); border-radius: 18px; background: var(--white); }
.flow-step::before { counter-increment: step; content: counter(step, decimal-leading-zero); display: block; margin-bottom: 18px; color: var(--brand); font-size: 13px; font-weight: 900; }
.flow-step h3 { margin: 0 0 8px; font-size: 17px; line-height: 1.35; }
.flow-step p { margin: 0 0 13px; color: var(--body); font-size: 13px; }
.flow-step a { color: var(--brand); font-size: 13px; font-weight: 800; }

.timeline { display: grid; gap: 0; border-top: 1px solid var(--border); }
.timeline-item { display: grid; grid-template-columns: 130px 260px 1fr auto; gap: 22px; align-items: start; padding: 23px 0; border-bottom: 1px solid var(--border); }
.timeline-item time { color: var(--brand); font-size: 13px; font-weight: 800; }
.timeline-item strong { line-height: 1.45; }
.timeline-item p { margin: 0; color: var(--body); font-size: 14px; }

.review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.review-item { padding: 24px; border: 1px solid var(--border); border-radius: 20px; background: var(--white); }
.review-item span { color: var(--brand); font-size: 12px; font-weight: 900; }
.review-item h3 { margin: 10px 0 8px; font-size: 18px; }
.review-item p { margin: 0; color: var(--body); font-size: 14px; }

.faq-list { max-width: 900px; margin: 0 auto; border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question { width: 100%; min-height: 74px; padding: 20px 4px; border: 0; background: transparent; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--text); text-align: left; font-weight: 800; }
.faq-question::after { content: "+"; width: 34px; height: 34px; border-radius: 50%; background: var(--brand-soft); color: var(--brand); display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; font-size: 22px; }
.faq-item.is-open .faq-question::after { content: "−"; }
.faq-answer { padding: 0 48px 23px 4px; color: var(--body); }
.faq-answer p { margin: 0; }

.cta-panel { padding: 58px; border-radius: 30px; background: linear-gradient(135deg, var(--brand), #256bd7); color: var(--white); text-align: center; box-shadow: 0 22px 55px rgba(41,128,254,.24); }
.cta-panel h2 { max-width: 760px; margin: 0 auto 14px; font-size: clamp(34px, 5vw, 54px); line-height: 1.12; }
.cta-panel p { max-width: 720px; margin: 0 auto; color: rgba(255,255,255,.82); }
.cta-panel .download-btn { margin-top: 27px; background: var(--white); color: var(--brand-deep); box-shadow: none; }

.page-hero { padding: 82px 0 70px; background: radial-gradient(circle at 82% 15%, rgba(41,128,254,.14), transparent 30%), linear-gradient(180deg, #f8fbff, #fff); }
.page-hero-grid { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(320px,.9fr); gap: 56px; align-items: center; }
.page-hero h1 { margin: 10px 0 17px; font-size: clamp(42px, 6vw, 68px); line-height: 1.06; letter-spacing: -.045em; }
.page-hero p { margin: 0; color: var(--body); font-size: 18px; }
.page-hero-aside { padding: 28px; border: 1px solid var(--border); border-radius: 26px; background: var(--white); box-shadow: var(--shadow-soft); }
.page-hero-aside strong { display: block; font-size: 20px; }
.page-hero-aside ul { display: grid; gap: 9px; margin: 18px 0 0; padding: 0; list-style: none; }
.page-hero-aside li { padding: 10px 12px; border-radius: 11px; background: var(--blue-gray); color: var(--body); font-size: 14px; }
.page-hero-image { margin-top: 22px; max-height: 280px; width: 100%; object-fit: contain; }

.content-layout { display: grid; grid-template-columns: minmax(0,1fr) 310px; gap: 46px; align-items: start; }
.prose { max-width: 820px; }
.prose h2 { margin: 46px 0 15px; font-size: 32px; line-height: 1.22; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 28px 0 10px; font-size: 22px; }
.prose p { color: var(--body); }
.prose ul, .prose ol { color: var(--body); padding-left: 22px; }
.prose li + li { margin-top: 8px; }
.side-card { position: sticky; top: 108px; padding: 24px; border: 1px solid var(--border); border-radius: 21px; background: var(--blue-gray); }
.side-card h2 { margin: 0 0 11px; font-size: 20px; }
.side-card p { color: var(--body); font-size: 14px; }
.side-card .download-btn { width: 100%; margin: 12px 0 14px; }
.related-links { display: grid; gap: 7px; margin-top: 16px; }
.related-links a { padding: 10px 12px; border-radius: 11px; background: var(--white); color: var(--brand); font-size: 14px; font-weight: 800; }

.info-cards { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.info-card { padding: 25px; border: 1px solid var(--border); border-radius: 20px; background: var(--white); }
.info-card h3 { margin: 0 0 9px; font-size: 20px; }
.info-card p { margin: 0; color: var(--body); font-size: 14px; }

.data-table { width: 100%; border-collapse: separate; border-spacing: 0; border: 1px solid var(--border); border-radius: 18px; overflow: hidden; }
.data-table th, .data-table td { padding: 15px 17px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.data-table th { background: var(--blue-gray); color: var(--text); font-size: 14px; }
.data-table td { color: var(--body); font-size: 14px; }
.data-table tr:last-child td { border-bottom: 0; }

.notice { padding: 22px 24px; border-left: 4px solid var(--brand); border-radius: 14px; background: var(--brand-soft); color: #2d4e75; }
.notice strong { color: var(--text); }
.policy-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.policy-meta span { padding: 8px 12px; border-radius: 999px; background: var(--brand-soft); color: var(--brand-deep); font-size: 13px; font-weight: 800; }

.site-footer { background: var(--footer); color: var(--white); }
.footer-main { width: var(--container); margin: 0 auto; padding: 72px 0 48px; display: grid; grid-template-columns: 1.6fr repeat(4, minmax(0,1fr)); gap: 34px; }
.footer-brand p { max-width: 340px; color: rgba(255,255,255,.68); font-size: 14px; }
.footer-brand .brand img { filter: brightness(0) invert(1); }
.footer-download { margin-top: 12px; }
.footer-column h2 { margin: 0 0 15px; font-size: 15px; }
.footer-column a { display: block; margin: 9px 0; color: rgba(255,255,255,.68); font-size: 14px; }
.footer-column a:hover { color: var(--white); }
.footer-safety { width: var(--container); margin: 0 auto; padding: 22px 24px; border: 1px solid rgba(255,255,255,.12); border-radius: 18px; background: rgba(255,255,255,.05); }
.footer-safety strong { display: block; margin-bottom: 5px; }
.footer-safety p { margin: 0; color: rgba(255,255,255,.66); font-size: 13px; }
.footer-bottom { width: var(--container); margin: 0 auto; padding: 24px 0 32px; display: flex; justify-content: space-between; gap: 20px; color: rgba(255,255,255,.52); font-size: 13px; }
.footer-bottom p { margin: 0; }
.footer-bottom div { display: flex; gap: 18px; }

@media (max-width: 1100px) {
    :root { --container: min(100% - 32px, 960px); }
    .desktop-nav { display: none; }
    .header-shell { grid-template-columns: auto 1fr auto; }
    .header-actions { justify-self: end; }
    .more-toggle { display: none; }
    .mobile-menu-toggle { display: inline-flex; }
    .mobile-overlay { position: fixed; inset: 0; z-index: 1190; background: rgba(9,27,53,.48); backdrop-filter: blur(3px); }
    .mobile-overlay:not([hidden]) { display: block; }
    .mobile-menu { display: flex; position: fixed; top: 0; right: 0; bottom: 0; z-index: 1200; width: min(440px, 92vw); padding: 20px; background: var(--white); flex-direction: column; transform: translateX(105%); transition: transform .24s ease; overflow-y: auto; }
    .mobile-menu.is-open { transform: translateX(0); }
    .mobile-menu-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
    .mobile-menu-close { width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 13px; background: var(--white); font-size: 28px; line-height: 1; }
    .mobile-nav { display: grid; padding: 16px 0; }
    .mobile-nav > a, .mobile-nav summary { min-height: 50px; display: flex; align-items: center; padding: 0 8px; font-weight: 800; }
    .mobile-nav details { border-bottom: 1px solid var(--border); }
    .mobile-nav summary { justify-content: space-between; list-style: none; cursor: pointer; }
    .mobile-nav summary::-webkit-details-marker { display: none; }
    .mobile-nav summary::after { content: "+"; color: var(--brand); font-size: 22px; }
    .mobile-nav details[open] summary::after { content: "−"; }
    .mobile-nav details div { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 7px; padding: 0 8px 14px; }
    .mobile-nav details a { min-height: 44px; padding: 10px 11px; border-radius: 11px; background: var(--blue-gray); color: var(--body); font-size: 14px; }
    .mobile-menu-action { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--border); }
    .mobile-menu-action .download-btn { width: 100%; }
    .mobile-menu-action p { color: var(--muted); font-size: 12px; }
    .capability-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .capability-item:nth-child(3)::before { display: none; }
    .capability-item:nth-child(n+3) { border-top: 1px solid var(--border); }
    .category-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .category-card:nth-child(n) { grid-column: span 1; }
    .steps-flow { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .review-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .footer-main { grid-template-columns: 1.5fr repeat(2,minmax(0,1fr)); }
    .footer-brand { grid-row: span 2; }
}

@media (max-width: 820px) {
    :root { --container: min(100% - 28px, 720px); }
    .section { padding: 76px 0; }
    .hero { padding-top: 64px; }
    .hero-grid, .page-hero-grid, .split-feature, .split-feature.reverse, .swap-layout, .safety-grid, .content-layout { grid-template-columns: 1fr; }
    .hero-visual { min-height: 450px; }
    .split-feature.reverse .visual-panel { order: 0; }
    .visual-panel { min-height: 380px; }
    .dual-grid, .dapp-grid { grid-template-columns: 1fr; }
    .topic-panel.offset { margin-top: 0; }
    .safety-statement, .side-card { position: static; }
    .timeline-item { grid-template-columns: 105px 1fr; }
    .timeline-item p, .timeline-item a { grid-column: 2; }
    .info-cards { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .footer-main { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .footer-brand { grid-column: 1 / -1; grid-row: auto; }
}

@media (max-width: 600px) {
    :root { --container: calc(100% - 24px); }
    .header-shell { height: 70px; gap: 9px; }
    .brand img { max-width: 126px; max-height: 38px; }
    .header-download { min-height: 42px; padding: 0 14px; border-radius: 12px; font-size: 13px; }
    .icon-button { width: 42px; height: 42px; }
    .hero { padding: 48px 0 60px; }
    .hero-copy h1 { font-size: 43px; }
    .hero-copy p, .page-hero p, .lead { font-size: 16px; }
    .button-row { align-items: stretch; }
    .button-row > a { width: 100%; }
    .hero-visual { min-height: auto; padding-top: 32px; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; }
    .hero-image-panel { grid-column: 1 / -1; width: 100%; padding: 20px; border-radius: 26px; }
    .float-note { position: static; min-width: 0; padding: 11px; }
    .float-three { grid-column: 1 / -1; }
    .capability-strip { margin-top: -16px; }
    .capability-grid { grid-template-columns: 1fr; }
    .capability-item + .capability-item::before { display: none; }
    .capability-item:nth-child(n+2) { border-top: 1px solid var(--border); }
    .category-grid, .info-cards, .review-grid, .preflight-grid, .topic-list { grid-template-columns: 1fr; }
    .category-card:nth-child(n) { grid-column: auto; }
    .section-title h2, .content-panel h2 { font-size: 34px; }
    .visual-panel { min-height: 310px; padding: 22px; }
    .topic-panel, .dapp-primary, .dapp-secondary, .preflight { padding: 24px; }
    .steps-flow { grid-template-columns: 1fr; }
    .timeline-item { grid-template-columns: 1fr; gap: 7px; }
    .timeline-item p, .timeline-item a { grid-column: auto; }
    .cta-panel { padding: 42px 22px; border-radius: 24px; }
    .page-hero { padding: 56px 0 52px; }
    .page-hero h1 { font-size: 42px; }
    .data-table { display: block; overflow-x: auto; white-space: normal; }
    .footer-main { grid-template-columns: 1fr 1fr; gap: 26px 18px; padding-top: 54px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; }
    .footer-bottom div { flex-wrap: wrap; }
}