:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-line: #CFE2FF;
    --white: #FFFFFF;
    --bg: #F6F8FC;
    --bg-soft: #F1F6FF;
    --text: #223047;
    --muted: #667085;
    --light: #E6EAF0;
    --panel: #FBFCFF;
    --shadow: 0 18px 50px rgba(34, 48, 71, 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;
    background: var(--bg);
    color: var(--text);
    line-height: 1.72;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
p { margin: 0 0 14px; color: var(--muted); }
h1, h2, h3 { margin: 0 0 16px; color: var(--text); line-height: 1.22; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.1rem, 8vw, 4.5rem); }
h2 { font-size: clamp(1.65rem, 5vw, 2.75rem); }
h3 { font-size: 1.1rem; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--light);
}
.header-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-logo, .footer-logo { width: 38px; height: 38px; object-fit: contain; }
.brand-name { font-weight: 800; letter-spacing: -0.02em; }
.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--light);
    background: var(--white);
    border-radius: 14px;
    display: grid;
    place-content: center;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--text); display: block; border-radius: 10px; }
.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 82px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: 22px;
    box-shadow: var(--shadow);
}
.site-nav.is-open { display: flex; }
.site-nav a { padding: 10px 12px; color: var(--muted); border-radius: 12px; font-weight: 650; }
.site-nav a:hover { background: var(--primary-soft); color: var(--primary); }

.site-main { min-height: 70vh; }
.container, .section-shell, .page-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 64px 0; }
.section-kicker, .badge, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 30px;
    padding: 5px 11px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid var(--primary-line);
    border-radius: 999px;
    font-size: 0.86rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.section-head { margin-bottom: 24px; max-width: 760px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 850;
    border: 1px solid var(--primary);
    box-shadow: 0 14px 30px rgba(41,128,254,0.22);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 38px rgba(41,128,254,0.28); }
.text-link { color: var(--primary); font-weight: 800; display: inline-flex; gap: 6px; }
.text-link::after { content: '→'; }

.web3-dashboard-hero {
    position: relative;
    padding: 54px 0 40px;
    background:
        radial-gradient(circle at 78% 12%, rgba(41,128,254,0.16), transparent 34%),
        linear-gradient(180deg, #FFFFFF 0%, #F4F8FF 100%);
    overflow: hidden;
}
.web3-dashboard-hero::after {
    content: '';
    position: absolute;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    right: -260px;
    top: -160px;
    border: 70px solid rgba(41,128,254,0.07);
}
.hero-grid {
    position: relative;
    display: grid;
    gap: 28px;
    align-items: center;
}
.hero-copy { max-width: 680px; }
.hero-copy p { font-size: 1.02rem; }
.safety-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 24px; }
.safety-tags span {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--white);
    border: 1px solid var(--light);
    color: var(--muted);
    font-weight: 700;
    font-size: 0.9rem;
}
.hero-console {
    position: relative;
    border-radius: 30px;
    padding: 18px;
    background: rgba(255,255,255,0.82);
    border: 1px solid rgba(207,226,255,0.9);
    box-shadow: var(--shadow);
}
.product-frame {
    padding: 18px;
    border-radius: 26px;
    background: linear-gradient(180deg, #FFFFFF, #EEF5FF);
    border: 1px solid var(--primary-line);
}
.product-frame img { margin: 0 auto; max-height: 430px; object-fit: contain; }
.status-cluster { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 14px; }
.status-card {
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: 18px;
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: center;
}
.status-card strong { font-size: 0.95rem; }
.status-card span { color: var(--primary); font-size: 0.82rem; font-weight: 850; }

.service-index { padding: 48px 0; background: var(--white); }
.service-grid { display: grid; gap: 14px; }
.service-card {
    padding: 20px;
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: var(--radius);
    box-shadow: 0 12px 28px rgba(34,48,71,0.05);
}
.service-card .tag { color: var(--primary); font-size: 0.82rem; font-weight: 850; margin-bottom: 8px; display: block; }
.service-card p { min-height: 54px; }

.feature-split, .digital-assets-hub, .web3-ecosystem-section, .hardware-wallet-section, .swap-service-section {
    display: grid;
    gap: 24px;
    align-items: center;
    padding: 26px;
    border-radius: 30px;
    background: var(--white);
    border: 1px solid var(--light);
    box-shadow: var(--shadow);
}
.hardware-wallet-section, .privacy-boundary-section { background: linear-gradient(135deg, #F8FBFF, #EEF5FF); }
.feature-image {
    border-radius: 28px;
    background: var(--panel);
    border: 1px solid var(--light);
    padding: 20px;
}
.feature-image img { max-height: 360px; object-fit: contain; margin: 0 auto; }
.feature-list, .check-list { padding: 0; margin: 18px 0; list-style: none; display: grid; gap: 10px; }
.feature-list li, .check-list li {
    position: relative;
    padding-left: 26px;
    color: var(--muted);
}
.feature-list li::before, .check-list li::before {
    content: '';
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--primary);
    position: absolute;
    left: 4px;
    top: 12px;
}

.privacy-boundary-section, .submit-chain-section, .developer-center-section, .cta-section {
    padding: 28px;
    border-radius: 30px;
    border: 1px solid var(--light);
    box-shadow: var(--shadow);
}
.privacy-boundary-section { display: grid; gap: 18px; }
.boundary-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.boundary-tags span { padding: 9px 12px; border-radius: 999px; background: var(--white); border: 1px solid var(--primary-line); color: var(--primary); font-weight: 800; }
.submit-chain-section { background: var(--white); }
.eco-grid { display: grid; gap: 14px; margin-top: 18px; }
.eco-card, .doc-card, .risk-card, .faq-item, .step-card, .info-card {
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: 22px;
    padding: 18px;
}
.eco-card strong, .doc-card strong { display: block; margin-bottom: 8px; }
.developer-center-section { background: linear-gradient(135deg, #FFFFFF, #EEF5FF); display: grid; gap: 20px; }
.code-panel {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    color: #344054;
    background: #F7FAFF;
    border: 1px solid var(--primary-line);
    border-radius: 22px;
    padding: 18px;
    overflow-x: auto;
}
.code-line { display: block; white-space: nowrap; margin: 7px 0; }
.code-line .blue { color: var(--primary); font-weight: 800; }
.doc-grid { display: grid; gap: 14px; margin-top: 18px; }

.process-steps { display: grid; gap: 14px; }
.step-card { position: relative; overflow: hidden; }
.step-number {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    margin-bottom: 12px;
}
.risk-grid { display: grid; gap: 14px; }
.risk-card { border-left: 4px solid var(--primary); }
.risk-card em { display: block; color: var(--primary); font-style: normal; font-weight: 850; margin-top: 8px; }
.faq-list { display: grid; gap: 14px; }
.faq-item h3 { margin-bottom: 8px; }
.cta-section {
    text-align: center;
    background: linear-gradient(135deg, #FFFFFF, #EAF3FF);
}
.cta-section p { max-width: 680px; margin-left: auto; margin-right: auto; }

.page-hero { padding: 58px 0 24px; background: linear-gradient(180deg, #FFFFFF, #F5F8FF); }
.page-hero .summary { font-size: 1.05rem; max-width: 760px; }
.page-layout { display: grid; gap: 22px; align-items: start; padding: 34px 0 70px; }
.article-card {
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: 28px;
    padding: 24px;
    box-shadow: var(--shadow);
}
.article-card h2 { font-size: 1.55rem; margin-top: 14px; }
.aside-panel {
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: 26px;
    padding: 20px;
    box-shadow: 0 12px 28px rgba(34,48,71,0.05);
}
.aside-panel ul { margin: 0; padding-left: 20px; color: var(--muted); }
.info-grid, .category-grid { display: grid; gap: 14px; margin: 20px 0; }
.safety-panel {
    padding: 18px;
    background: var(--bg-soft);
    border: 1px solid var(--primary-line);
    border-radius: 22px;
    margin: 18px 0;
}
.page-actions { margin-top: 22px; }
.faq-page-list { display: grid; gap: 16px; }

.site-footer { background: #F2F5FA; border-top: 1px solid var(--light); padding: 34px 0; }
.footer-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 20px;
}
.footer-brand p { max-width: 520px; margin: 4px 0 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-links a { color: var(--muted); padding: 8px 10px; border-radius: 12px; background: var(--white); border: 1px solid var(--light); }

@media (min-width: 640px) {
    .service-grid, .risk-grid, .doc-grid, .eco-grid, .info-grid, .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .status-cluster { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
    .nav-toggle { display: none; }
    .site-nav { position: static; display: flex; flex-direction: row; align-items: center; background: transparent; border: 0; box-shadow: none; padding: 0; gap: 2px; }
    .site-nav a { font-size: 0.92rem; padding: 8px 9px; }
    .web3-dashboard-hero { padding: 78px 0 58px; }
    .hero-grid { grid-template-columns: 1.02fr 0.98fr; gap: 34px; }
    .service-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .service-card:nth-child(1), .service-card:nth-child(7) { grid-column: span 2; }
    .feature-split, .digital-assets-hub, .web3-ecosystem-section, .hardware-wallet-section, .swap-service-section { grid-template-columns: 1fr 0.86fr; padding: 34px; }
    .web3-ecosystem-section, .swap-service-section { grid-template-columns: 0.88fr 1fr; }
    .web3-ecosystem-section .feature-image, .swap-service-section .feature-image { order: -1; }
    .privacy-boundary-section { grid-template-columns: 1fr 1fr; padding: 34px; }
    .submit-chain-section { padding: 34px; }
    .developer-center-section { grid-template-columns: 1fr 1fr; padding: 34px; }
    .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .page-layout { grid-template-columns: minmax(0, 1fr) 320px; }
    .article-card { padding: 34px; }
    .footer-shell { grid-template-columns: 1fr auto; align-items: center; }
}
@media (min-width: 1120px) {
    .site-nav a { padding: 8px 11px; }
}
@media (max-width: 380px) {
    .container, .section-shell, .page-shell, .header-shell, .footer-shell { width: min(100% - 24px, 1180px); }
    .download-btn { width: 100%; }
}