:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-light: #F4F8FF;
    --text: #202A3A;
    --muted: #657287;
    --line: #E5EBF3;
    --bg: #F7FAFE;
    --white: #FFFFFF;
    --dark: #1C2533;
    --shadow: 0 16px 42px rgba(41, 128, 254, 0.10);
    --soft-shadow: 0 12px 28px rgba(34, 49, 74, 0.08);
    --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFE 42%, #FFFFFF 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.content-container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(229,235,243,0.85);
}
.nav-shell { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.logo, .footer-logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--dark); letter-spacing: .02em; }
.logo img, .footer-logo img { width: 38px; height: 38px; object-fit: contain; border-radius: 12px; }
.site-nav { display: none; flex-direction: column; position: absolute; left: 16px; right: 16px; top: 72px; padding: 16px; background: var(--white); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--soft-shadow); }
.site-nav a { padding: 10px 12px; color: var(--muted); font-weight: 650; border-radius: 12px; }
.site-nav a.active, .site-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.mobile-nav-button { display: grid; gap: 5px; width: 44px; height: 44px; place-content: center; border: 1px solid var(--line); border-radius: 14px; background: var(--white); }
.mobile-nav-button span { width: 20px; height: 2px; background: var(--dark); border-radius: 99px; }
.nav-toggle:checked ~ .site-nav { display: flex; }
.section { padding: 72px 0; }
.section.compact { padding: 48px 0; }
.section-title { max-width: 760px; margin-bottom: 28px; }
.section-kicker, .badge, .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); background: var(--primary-soft); border: 1px solid rgba(41,128,254,0.18); border-radius: 999px; padding: 7px 12px; font-size: 13px; font-weight: 800; }
h1, h2, h3 { line-height: 1.18; color: var(--dark); margin: 0 0 14px; }
h1 { font-size: clamp(36px, 8vw, 64px); letter-spacing: -0.05em; }
h2 { font-size: clamp(28px, 5vw, 42px); letter-spacing: -0.035em; }
h3 { font-size: 20px; }
p { margin: 0 0 16px; color: var(--muted); }
ul, ol { margin: 0; padding-left: 22px; color: var(--muted); }
li + li { margin-top: 8px; }
.download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 850;
    box-shadow: 0 12px 28px rgba(41,128,254,0.28);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(41,128,254,0.32); }
.text-link { color: var(--primary); font-weight: 800; }
.web3-hero {
    position: relative;
    padding: 72px 0 56px;
    overflow: hidden;
    background:
        radial-gradient(circle at 82% 12%, rgba(41,128,254,0.18), transparent 28%),
        radial-gradient(circle at 12% 22%, rgba(41,128,254,0.08), transparent 30%);
}
.web3-hero:before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(41,128,254,0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(41,128,254,0.08) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: linear-gradient(180deg, rgba(0,0,0,0.48), transparent 78%);
    pointer-events: none;
}
.hero-grid { position: relative; display: grid; gap: 36px; align-items: center; }
.hero-copy { max-width: 640px; }
.hero-copy p { font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 26px 0; }
.hero-tags, .floating-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span, .floating-tags span, .pill { padding: 8px 12px; border-radius: 999px; background: var(--white); color: var(--primary); border: 1px solid rgba(41,128,254,0.18); font-size: 13px; font-weight: 800; box-shadow: 0 8px 20px rgba(41,128,254,0.08); }
.hero-visual { position: relative; min-height: 360px; display: grid; place-items: center; }
.hero-phone-card { position: relative; width: min(360px, 84vw); padding: 24px; border-radius: 36px; background: rgba(255,255,255,0.72); border: 1px solid rgba(229,235,243,0.86); box-shadow: var(--shadow); backdrop-filter: blur(12px); }
.hero-phone-card img { margin: auto; max-height: 470px; object-fit: contain; }
.status-card { position: absolute; width: 178px; padding: 14px; border-radius: 18px; background: rgba(255,255,255,0.9); border: 1px solid var(--line); box-shadow: var(--soft-shadow); }
.status-card strong { display: block; color: var(--dark); font-size: 14px; }
.status-card small { color: var(--muted); }
.status-card.one { left: 0; top: 34px; }
.status-card.two { right: 0; top: 92px; }
.status-card.three { left: 10px; bottom: 38px; }
.status-card.four { right: 8px; bottom: 18px; }
.ecosystem-nav, .category-grid, .risk-grid, .faq-grid, .info-grid { display: grid; gap: 16px; }
.ecosystem-card, .category-card, .risk-card, .faq-item, .info-card, .step-card, .content-card, .side-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 10px 26px rgba(31,45,69,0.05);
}
.ecosystem-card { min-height: 172px; display: flex; flex-direction: column; justify-content: space-between; }
.ecosystem-card .tag { align-self: flex-start; padding: 4px 9px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-weight: 850; font-size: 12px; }
.ecosystem-card h3 { margin-top: 12px; }
.web3-section, .hardware-wallet-section, .digital-assets-section, .swap-section, .privacy-section, .submit-chain-section, .developer-center-section { padding: 76px 0; }
.gradient-bg { background: linear-gradient(135deg, #F6FAFF 0%, #FFFFFF 45%, #EEF6FF 100%); }
.feature-panel {
    display: grid;
    gap: 28px;
    align-items: center;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 32px;
    background: rgba(255,255,255,0.86);
    box-shadow: var(--soft-shadow);
}
.feature-panel.alt { background: linear-gradient(135deg, #F5F9FF 0%, #FFFFFF 100%); }
.feature-image { border-radius: 26px; background: var(--primary-light); padding: 20px; min-height: 260px; display: grid; place-items: center; overflow: hidden; }
.feature-image img { max-height: 420px; object-fit: contain; }
.feature-list { display: grid; gap: 12px; margin: 20px 0; }
.feature-list div { padding: 12px 14px; border: 1px solid var(--line); border-radius: 16px; background: #FBFDFF; color: var(--muted); }
.privacy-section .boundary-grid, .submit-chain-section .submit-grid, .developer-center-section .developer-grid { display: grid; gap: 18px; }
.safety-panel {
    padding: 24px;
    border-radius: 28px;
    border: 1px solid rgba(41,128,254,0.18);
    background: linear-gradient(135deg, #FFFFFF 0%, #F1F7FF 100%);
}
.safety-panel .pill-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.code-panel { background: #F7FAFE; border: 1px solid var(--line); border-radius: 24px; padding: 20px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #2F405B; overflow-x: auto; }
.code-panel span { color: var(--primary); }
.process-steps { display: grid; gap: 14px; counter-reset: step; }
.step-card { position: relative; padding-left: 76px; }
.step-card:before { counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 22px; width: 38px; height: 38px; border-radius: 14px; background: var(--primary); color: var(--white); display: grid; place-items: center; font-weight: 900; }
.risk-card { border-left: 4px solid var(--primary); }
.risk-card .risk-label { display: inline-flex; margin-bottom: 8px; padding: 4px 9px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-size: 12px; font-weight: 800; }
.page-hero { padding: 58px 0 32px; background: linear-gradient(135deg, #FFFFFF 0%, #F2F7FF 100%); border-bottom: 1px solid var(--line); }
.page-hero .content-container { max-width: 960px; }
.page-layout { display: grid; gap: 24px; padding: 48px 0 72px; }
.article { display: grid; gap: 18px; }
.article .content-card h2 { font-size: 26px; }
.side-card { align-self: start; position: sticky; top: 96px; }
.check-list { list-style: none; padding: 0; display: grid; gap: 10px; }
.check-list li { padding-left: 28px; position: relative; }
.check-list li:before { content: ""; position: absolute; left: 0; top: 9px; width: 10px; height: 10px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 5px var(--primary-soft); }
.cta-section { padding: 70px 0; }
.cta-box { text-align: center; padding: 40px 24px; border-radius: 34px; background: linear-gradient(135deg, #EEF6FF 0%, #FFFFFF 100%); border: 1px solid var(--line); box-shadow: var(--soft-shadow); }
.site-footer { padding: 48px 0 22px; background: #F4F7FB; border-top: 1px solid var(--line); }
.footer-grid { display: grid; gap: 24px; }
.footer-grid h3 { font-size: 16px; margin-bottom: 10px; }
.footer-grid a { display: block; color: var(--muted); margin: 7px 0; }
.footer-grid a:hover { color: var(--primary); }
.footer-bottom { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
@media (min-width: 680px) {
    .ecosystem-nav { grid-template-columns: repeat(2, 1fr); }
    .category-grid, .risk-grid, .faq-grid, .info-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1.5fr repeat(3, 1fr); }
}
@media (min-width: 940px) {
    .site-nav { display: flex; position: static; flex-direction: row; align-items: center; padding: 0; background: transparent; border: 0; box-shadow: none; border-radius: 0; }
    .site-nav a { font-size: 14px; padding: 8px 9px; }
    .mobile-nav-button { display: none; }
    .hero-grid { grid-template-columns: 1.02fr .98fr; }
    .web3-hero { padding: 96px 0 76px; }
    .ecosystem-nav { grid-template-columns: repeat(4, 1fr); }
    .ecosystem-card:nth-child(1), .ecosystem-card:nth-child(7) { grid-column: span 2; }
    .feature-panel { grid-template-columns: 1fr 1fr; padding: 38px; }
    .feature-panel.reverse .feature-image { order: -1; }
    .privacy-section .boundary-grid, .submit-chain-section .submit-grid, .developer-center-section .developer-grid { grid-template-columns: 1fr 1fr; }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
    .category-grid { grid-template-columns: repeat(4, 1fr); }
    .faq-grid { grid-template-columns: repeat(2, 1fr); }
    .page-layout { grid-template-columns: minmax(0, 1fr) 320px; }
}
@media (max-width: 520px) {
    .content-container { width: min(100% - 24px, 1120px); }
    .hero-actions { align-items: stretch; }
    .download-btn { width: 100%; }
    .status-card { position: static; width: 100%; margin-top: 10px; }
    .hero-visual { min-height: auto; }
    .hero-phone-card { width: 100%; }
    .feature-panel { padding: 18px; border-radius: 24px; }
    .feature-image { padding: 14px; min-height: 220px; }
    .section, .web3-section, .hardware-wallet-section, .digital-assets-section, .swap-section, .privacy-section, .submit-chain-section, .developer-center-section { padding: 52px 0; }
    .step-card { padding-left: 66px; }
}