:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-line: #CFE2FF;
    --white: #FFFFFF;
    --bg: #F6F8FC;
    --bg-soft: #F9FBFF;
    --text: #1F2937;
    --muted: #667085;
    --line: #E5EAF2;
    --deep: #0F172A;
    --radius: 24px;
    --radius-lg: 32px;
    --shadow: 0 20px 60px rgba(31, 41, 55, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 42%, #FFFFFF 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(100% - 32px, 1180px); margin: 0 auto; }
.narrow { width: min(100% - 32px, 920px); margin: 0 auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
}
.nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo, .footer-logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--deep); letter-spacing: .02em; }
.logo img, .footer-logo img { width: 34px; height: 34px; object-fit: contain; }
.nav-toggle {
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 14px;
    width: 44px;
    height: 44px;
    color: var(--deep);
    font-size: 20px;
}
.site-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}
.site-nav.is-open { display: flex; }
.site-nav a { padding: 10px 12px; border-radius: 14px; color: var(--muted); font-weight: 650; font-size: 14px; }
.site-nav a:hover { color: var(--primary); background: var(--primary-soft); }

.section { padding: 58px 0; }
.section-head { margin-bottom: 24px; }
.eyebrow, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid var(--primary-line);
    border-radius: 999px;
    padding: 6px 12px;
    font-weight: 800;
    font-size: 13px;
}
h1, h2, h3 { color: var(--deep); line-height: 1.2; margin: 0 0 14px; }
h1 { font-size: clamp(34px, 8vw, 68px); letter-spacing: -.04em; }
h2 { font-size: clamp(28px, 5vw, 44px); letter-spacing: -.03em; }
h3 { font-size: 20px; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: 18px; color: #435165; }
.text-link { color: var(--primary); font-weight: 800; }
.text-link::after { content: " →"; }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 34px rgba(41, 128, 254, .25);
    transition: transform .2s ease, box-shadow .2s ease;
    border: 0;
    white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 42px rgba(41, 128, 254, .32); }

.web3-hero {
    position: relative;
    padding: 52px 0 34px;
    overflow: hidden;
}
.web3-hero::before {
    content: "";
    position: absolute;
    inset: -160px -220px auto auto;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(41,128,254,.20), rgba(41,128,254,0) 66%);
    pointer-events: none;
}
.hero-grid { display: grid; gap: 34px; align-items: center; }
.hero-copy { position: relative; z-index: 1; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 24px 0 20px; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span, .tag-pill {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--white);
    border: 1px solid var(--line);
    color: #435165;
    font-size: 13px;
    font-weight: 700;
}
.hero-visual {
    position: relative;
    background: linear-gradient(145deg, #FFFFFF, #EEF6FF);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 26px;
    min-height: 360px;
    display: grid;
    place-items: center;
}
.hero-visual img { max-height: 420px; object-fit: contain; filter: drop-shadow(0 24px 42px rgba(23, 50, 90, .16)); }
.float-label {
    position: absolute;
    background: rgba(255,255,255,.94);
    border: 1px solid var(--primary-line);
    color: var(--primary);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(31, 41, 55, .08);
}
.float-label.one { top: 24px; left: 18px; }
.float-label.two { top: 82px; right: 18px; }
.float-label.three { bottom: 72px; left: 16px; }
.float-label.four { bottom: 24px; right: 20px; }

.ecosystem-nav { padding: 28px 0 48px; }
.ecosystem-grid, .category-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.ecosystem-card, .feature-card, .risk-card, .faq-item, .info-card, .step-card, .related-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 30px rgba(31, 41, 55, .05);
}
.ecosystem-card { position: relative; overflow: hidden; }
.ecosystem-card::before { content: ""; position: absolute; top: 0; left: 22px; right: 22px; height: 3px; background: var(--primary); border-radius: 0 0 999px 999px; opacity: .75; }
.ecosystem-card small { color: var(--primary); font-weight: 900; }
.ecosystem-card h3 { margin-top: 8px; }

.split-section, .web3-section, .hardware-wallet-section, .digital-assets-section, .swap-section, .developer-center-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    align-items: center;
}
.panel {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 26px;
    box-shadow: var(--shadow);
}
.image-panel {
    background: linear-gradient(145deg, #FFFFFF, #EFF6FF);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: grid;
    place-items: center;
    min-height: 280px;
}
.image-panel img { max-height: 360px; object-fit: contain; }
.soft-band { background: linear-gradient(180deg, #F7FAFF, #FFFFFF); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-list { display: grid; gap: 10px; margin: 18px 0; padding: 0; list-style: none; }
.feature-list li { padding: 12px 14px; border-radius: 16px; background: var(--bg-soft); color: #435165; border: 1px solid var(--line); }
.feature-list li::before { content: "•"; color: var(--primary); font-weight: 900; margin-right: 8px; }

.privacy-section, .submit-chain-section { display: grid; gap: 18px; }
.privacy-grid { display: grid; gap: 16px; }
.submit-box {
    background: linear-gradient(135deg, #FFFFFF 0%, #EFF6FF 100%);
    border: 1px solid var(--primary-line);
    border-radius: var(--radius-lg);
    padding: 28px;
}
.dev-panel {
    background: #F8FBFF;
    border: 1px solid var(--primary-line);
    border-radius: var(--radius-lg);
    padding: 24px;
    overflow: hidden;
}
.code-card {
    margin-top: 18px;
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 18px;
    color: #344054;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 13px;
    line-height: 1.8;
}
.code-card span { color: var(--primary); }

.process-steps { display: grid; gap: 16px; counter-reset: step; }
.step-card { position: relative; padding-left: 74px; min-height: 116px; }
.step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 22px;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    font-size: 13px;
}
.risk-grid { display: grid; gap: 16px; }
.risk-card { border-left: 4px solid var(--primary); }
.risk-card strong { display: block; color: var(--deep); margin-bottom: 6px; }
.risk-card em { display: block; font-style: normal; color: #435165; font-weight: 700; margin-top: 10px; }
.faq-list { display: grid; gap: 14px; }
.faq-item h3 { font-size: 18px; }
.cta-section {
    padding: 68px 0;
    background: linear-gradient(135deg, #F7FAFF 0%, #EAF3FF 100%);
}
.cta-box {
    text-align: center;
    border: 1px solid var(--primary-line);
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,.74);
    padding: 36px 20px;
    box-shadow: var(--shadow);
}

.page-hero {
    padding: 54px 0 28px;
    background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 100%);
    border-bottom: 1px solid var(--line);
}
.page-layout { display: grid; gap: 24px; padding: 46px 0 66px; }
.content-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 26px;
    box-shadow: var(--shadow);
}
.side-panel { display: grid; gap: 16px; align-self: start; }
.checklist { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; }
.checklist li { border: 1px solid var(--line); background: var(--bg-soft); border-radius: 16px; padding: 12px 14px; }
.checklist li::before { content: "✓"; color: var(--primary); font-weight: 900; margin-right: 8px; }
.notice-box {
    border: 1px solid var(--primary-line);
    background: var(--primary-soft);
    border-radius: var(--radius);
    padding: 20px;
    color: #435165;
}
.download-area { margin-top: 22px; }
.table-like { display: grid; gap: 10px; margin-top: 18px; }
.table-like div { display: grid; gap: 4px; padding: 14px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg-soft); }
.table-like b { color: var(--deep); }

.site-footer { background: #F5F7FB; border-top: 1px solid var(--line); padding: 44px 0 22px; }
.footer-grid { display: grid; gap: 24px; }
.site-footer h2 { font-size: 15px; margin-bottom: 12px; }
.site-footer a { display: block; color: var(--muted); margin: 7px 0; font-size: 14px; }
.site-footer a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--line); margin-top: 28px; padding-top: 18px; }
.footer-bottom p { font-size: 13px; }

@media (min-width: 680px) {
    .ecosystem-grid { grid-template-columns: repeat(2, 1fr); }
    .category-grid, .privacy-grid, .risk-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.3fr 1fr 1fr 1fr; }
}

@media (min-width: 960px) {
    .nav-toggle { display: none; }
    .site-nav { position: static; display: flex; flex-direction: row; align-items: center; gap: 2px; padding: 0; border: 0; box-shadow: none; background: transparent; }
    .site-nav a { font-size: 14px; padding: 9px 10px; }
    .web3-hero { padding: 86px 0 42px; }
    .hero-grid { grid-template-columns: 1.02fr .98fr; gap: 56px; }
    .ecosystem-grid { grid-template-columns: repeat(4, 1fr); }
    .ecosystem-card:nth-child(1), .ecosystem-card:nth-child(7) { grid-column: span 2; }
    .web3-section, .hardware-wallet-section, .digital-assets-section, .swap-section, .developer-center-section, .split-section { grid-template-columns: 1fr 1fr; gap: 44px; }
    .hardware-wallet-section .image-panel, .swap-section .image-panel { order: -1; }
    .privacy-section { grid-template-columns: .85fr 1.15fr; align-items: start; }
    .submit-chain-section { grid-template-columns: 1.1fr .9fr; align-items: center; }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
    .page-layout { grid-template-columns: minmax(0, 1fr) 330px; }
    .page-layout.no-sidebar { grid-template-columns: 1fr; }
    .section { padding: 78px 0; }
    .content-card { padding: 34px; }
}