:root {
    --primary: #2980FE;
    --primary-dark: #1d64d8;
    --primary-soft: #edf5ff;
    --bg: #f7f9fc;
    --bg-soft: #f2f6fb;
    --white: #ffffff;
    --text: #172033;
    --muted: #667085;
    --line: #e5ebf3;
    --line-strong: #d8e2ee;
    --shadow: 0 18px 50px rgba(31, 63, 104, .08);
    --radius: 24px;
    --radius-lg: 32px;
    --container: 1180px;
}
* { 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;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
p { color: var(--muted); margin: 0 0 16px; }
h1, h2, h3 { margin: 0; color: var(--text); line-height: 1.18; }
h1 { font-size: clamp(2.15rem, 8vw, 4.8rem); letter-spacing: -0.06em; }
h2 { font-size: clamp(1.8rem, 5vw, 3rem); letter-spacing: -0.04em; }
h3 { font-size: 1.18rem; }
.container { width: min(100% - 32px, var(--container)); margin: 0 auto; }
.section { padding: 68px 0; }
.section-tight { padding: 46px 0; }
.section-head { margin-bottom: 28px; max-width: 760px; }
.section-head .eyebrow, .eyebrow { color: var(--primary); font-weight: 800; letter-spacing: .08em; font-size: .82rem; text-transform: uppercase; }
.gradient-bg { background: radial-gradient(circle at 5% 10%, rgba(41,128,254,.16), transparent 30%), linear-gradient(135deg, #ffffff 0%, #f4f8ff 64%, #edf5ff 100%); }
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid rgba(229,235,243,.9);
    backdrop-filter: blur(16px);
}
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; color: var(--text); }
.logo { width: 38px; height: 38px; object-fit: contain; border-radius: 12px; }
.brand-text { font-size: 1rem; letter-spacing: -.02em; }
.nav-toggle { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); display: grid; place-content: center; gap: 5px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 10px; }
.site-nav {
    display: none; position: absolute; top: 72px; left: 16px; right: 16px;
    background: var(--white); border: 1px solid var(--line); border-radius: 22px;
    padding: 12px; box-shadow: var(--shadow);
}
.site-nav.is-open { display: grid; }
.site-nav a { padding: 12px 14px; color: var(--muted); font-weight: 700; border-radius: 14px; }
.site-nav a.active, .site-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.download-btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 48px; padding: 0 26px; border-radius: 999px;
    background: var(--primary); color: #fff; font-weight: 900;
    box-shadow: 0 14px 30px rgba(41,128,254,.24);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 40px rgba(41,128,254,.28); }
.web3-hero { padding: 58px 0 38px; position: relative; overflow: hidden; }
.web3-hero:before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(90deg, rgba(41,128,254,.08) 1px, transparent 1px), linear-gradient(rgba(41,128,254,.08) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(circle at 80% 35%, #000, transparent 62%); pointer-events: none; }
.hero-grid { position: relative; display: grid; gap: 36px; align-items: center; }
.hero-copy p { font-size: 1.08rem; max-width: 680px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin: 24px 0 20px; }
.security-tags, .feature-pills { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span, .feature-pills span, .category-badge { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: 999px; background: #fff; color: var(--primary); border: 1px solid rgba(41,128,254,.18); font-size: .86rem; font-weight: 800; }
.hero-visual { position: relative; min-height: 350px; display: grid; place-items: center; }
.device-card { position: relative; width: min(420px, 86vw); padding: 18px; border-radius: 36px; background: rgba(255,255,255,.86); border: 1px solid rgba(216,226,238,.9); box-shadow: var(--shadow); }
.device-card img { width: 100%; border-radius: 26px; object-fit: contain; }
.float-label { position: absolute; padding: 9px 13px; border-radius: 999px; background: #fff; border: 1px solid var(--line); color: var(--text); font-weight: 900; box-shadow: 0 12px 36px rgba(31,63,104,.1); }
.float-label.one { top: 18px; left: -8px; }
.float-label.two { top: 90px; right: -4px; }
.float-label.three { bottom: 78px; left: -6px; }
.float-label.four { bottom: 22px; right: 28px; }
.ecosystem-nav { display: grid; gap: 14px; }
.ecosystem-card, .service-card, .info-card, .risk-card, .faq-item, .step-card, .guide-card {
    background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 12px 34px rgba(31,63,104,.06);
}
.ecosystem-card { padding: 20px; display: grid; gap: 10px; min-height: 178px; transition: transform .18s ease, border-color .18s ease; }
.ecosystem-card:hover { transform: translateY(-3px); border-color: rgba(41,128,254,.35); }
.ecosystem-card .mark { width: max-content; padding: 4px 10px; border-radius: 999px; color: var(--primary); background: var(--primary-soft); font-size: .76rem; font-weight: 900; }
.text-link { color: var(--primary); font-weight: 900; display: inline-flex; align-items: center; gap: 6px; }
.text-link:after { content: "→"; }
.feature-layout { display: grid; gap: 24px; align-items: center; }
.feature-layout.reverse .feature-image { order: -1; }
.feature-panel { padding: 28px; border-radius: var(--radius-lg); background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow); }
.feature-panel h2 { margin: 10px 0 16px; }
.feature-panel ul, .article-card ul, .safety-panel ul, .download-steps ol { margin: 16px 0 0; padding-left: 20px; color: var(--muted); }
.feature-image { padding: 20px; border-radius: var(--radius-lg); background: linear-gradient(150deg, #fff, #eef6ff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.feature-image img { max-height: 430px; object-fit: contain; margin: 0 auto; border-radius: 24px; }
.web3-section { background: #fff; }
.hardware-wallet-section, .privacy-section { background: linear-gradient(180deg, var(--bg-soft), #fff); }
.digital-assets-section { background: #fff; }
.swap-section { background: linear-gradient(180deg, #fff, var(--bg-soft)); }
.submit-chain-section { background: #fff; }
.developer-center-section { background: linear-gradient(135deg, #f7faff, #eef6ff); }
.category-grid { display: grid; gap: 16px; }
.service-card { padding: 22px; }
.service-card strong { color: var(--primary); }
.code-panel { background: #12213a; color: #dfeaff; border-radius: 24px; padding: 22px; box-shadow: 0 22px 54px rgba(18,33,58,.18); overflow: hidden; }
.code-panel .code-line { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92rem; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.08); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.code-panel .blue { color: #8fc2ff; }
.safety-panel { padding: 22px; border-left: 5px solid var(--primary); background: #fff; border-radius: 24px; }
.process-steps { display: grid; gap: 14px; }
.step-card { padding: 20px; position: relative; overflow: hidden; }
.step-card .num { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; background: var(--primary); color: #fff; font-weight: 900; margin-bottom: 12px; }
.risk-grid { display: grid; gap: 14px; }
.risk-card { padding: 20px; border-top: 4px solid var(--primary); }
.risk-card .risk-name { color: var(--text); font-weight: 900; display: block; margin-bottom: 8px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item h3 { margin-bottom: 8px; }
.cta-section { text-align: center; padding: 64px 0; background: radial-gradient(circle at center, rgba(41,128,254,.16), transparent 45%), linear-gradient(135deg, #fff, #edf5ff); }
.cta-box { width: min(760px, 100%); margin: 0 auto; padding: 34px 22px; border: 1px solid var(--line); border-radius: 32px; background: rgba(255,255,255,.88); box-shadow: var(--shadow); }
.page-hero { padding: 62px 0 28px; background: radial-gradient(circle at 15% 10%, rgba(41,128,254,.18), transparent 34%), linear-gradient(135deg, #fff, #f3f8ff); }
.page-hero .summary { max-width: 780px; font-size: 1.06rem; margin-top: 16px; }
.page-actions { margin-top: 22px; }
.article-wrap { display: grid; gap: 22px; align-items: start; padding: 46px 0 70px; }
.article-card { background: var(--white); border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--shadow); }
.article-card h2 { font-size: 1.62rem; margin: 10px 0 16px; }
.article-card p + h2 { margin-top: 26px; }
.aside-stack { display: grid; gap: 14px; }
.guide-card { padding: 18px; }
.guide-card h3 { margin-bottom: 8px; }
.download-steps { display: grid; gap: 20px; }
.install-grid { display: grid; gap: 16px; }
.site-footer { background: #111c2f; color: #d7dfec; padding: 46px 0 22px; }
.site-footer p, .site-footer a, .footer-bottom { color: #aab6c8; }
.footer-grid { display: grid; gap: 26px; }
.footer-logo { width: 36px; height: 36px; border-radius: 12px; }
.footer-brand { color: #fff; margin-bottom: 12px; }
.site-footer h2 { font-size: 1rem; color: #fff; margin-bottom: 12px; letter-spacing: 0; }
.site-footer a { display: block; margin: 7px 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 28px; padding-top: 18px; display: flex; flex-direction: column; gap: 8px; font-size: .9rem; }
@media (min-width: 640px) {
    .ecosystem-nav { grid-template-columns: repeat(2, 1fr); }
    .category-grid, .risk-grid, .process-steps, .install-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 880px) {
    .nav-toggle { display: none; }
    .site-nav { position: static; display: flex; align-items: center; justify-content: flex-end; gap: 4px; padding: 0; background: transparent; border: 0; box-shadow: none; }
    .site-nav a { font-size: .92rem; padding: 10px 11px; }
    .hero-grid { grid-template-columns: 1.04fr .96fr; min-height: 590px; }
    .web3-hero { padding: 80px 0 52px; }
    .ecosystem-nav { grid-template-columns: repeat(4, 1fr); }
    .feature-layout { grid-template-columns: 1.05fr .95fr; gap: 34px; }
    .feature-layout.reverse .feature-image { order: 2; }
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
    .article-wrap { grid-template-columns: minmax(0, 1fr) 330px; }
    .footer-grid { grid-template-columns: 1.3fr repeat(3, 1fr); }
    .footer-bottom { flex-direction: row; justify-content: space-between; }
}
@media (min-width: 1100px) {
    .site-nav a { padding: 10px 13px; }
    .ecosystem-nav .wide { grid-column: span 2; }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 420px) {
    .container { width: min(100% - 24px, var(--container)); }
    .float-label { font-size: .78rem; }
    .hero-visual { min-height: 310px; }
    .feature-panel, .article-card { padding: 20px; }
    .download-btn { width: 100%; }
}