:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-soft-2: #F5F9FF;
    --text: #253044;
    --muted: #667085;
    --light: #F4F7FB;
    --line: #E5EAF2;
    --white: #FFFFFF;
    --dark: #1D2939;
    --shadow: 0 18px 45px rgba(41, 128, 254, 0.10);
    --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #ffffff 0%, #f6f9fe 48%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
}
.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.02em;
}
.logo img { width: 38px; height: 38px; border-radius: 12px; }
.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--dark);
    border-radius: 14px;
    font-size: 22px;
}
.main-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--white);
    box-shadow: var(--shadow);
}
.main-nav.is-open { display: flex; }
.main-nav a {
    padding: 10px 12px;
    color: var(--muted);
    border-radius: 12px;
    font-size: 15px;
}
.main-nav a:hover { color: var(--primary); background: var(--primary-soft); }

.container, .section, .page-section {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}
.section { padding: 44px 0; }
.section-header { margin-bottom: 22px; }
.section-kicker, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41,128,254,0.18);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}
h1, h2, h3 { line-height: 1.2; color: var(--dark); margin: 0 0 14px; }
h1 { font-size: clamp(34px, 8vw, 64px); letter-spacing: -0.05em; }
h2 { font-size: clamp(26px, 5vw, 42px); letter-spacing: -0.035em; }
h3 { font-size: 21px; letter-spacing: -0.02em; }
p { margin: 0 0 14px; color: var(--muted); }
strong { color: var(--dark); }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 12px 26px rgba(41,128,254,0.22);
    transition: transform .2s ease, box-shadow .2s ease;
    border: 0;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(41,128,254,0.28); }
.link-arrow { color: var(--primary); font-weight: 800; }

.web3-dashboard-hero {
    width: min(1180px, calc(100% - 32px));
    margin: 30px auto 0;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 30px;
    background:
        radial-gradient(circle at top right, rgba(41,128,254,0.15), transparent 34%),
        linear-gradient(135deg, #ffffff 0%, #f3f8ff 100%);
    box-shadow: var(--shadow);
}
.hero-grid { display: grid; gap: 28px; align-items: center; }
.hero-copy p { font-size: 17px; max-width: 680px; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 24px; }
.security-tags span {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255,255,255,0.78);
    color: var(--dark);
    font-size: 13px;
    font-weight: 700;
}
.hero-panel {
    position: relative;
    display: grid;
    gap: 14px;
    padding: 16px;
    border-radius: 28px;
    background: rgba(255,255,255,0.78);
    border: 1px solid rgba(229,234,242,0.9);
}
.product-frame {
    padding: 18px;
    border-radius: 24px;
    background: linear-gradient(180deg, #ffffff 0%, #eef6ff 100%);
    border: 1px solid var(--line);
}
.status-grid { display: grid; grid-template-columns: 1fr; gap: 10px; }
.status-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--white);
}
.status-card span { color: var(--muted); font-size: 13px; }
.status-card strong { font-size: 15px; }
.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 0 6px rgba(41,128,254,0.1);
}

.service-index {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.service-card, .info-card, .risk-card, .faq-item, .step-card, .page-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: 0 10px 28px rgba(29,41,57,0.04);
}
.service-card .tag { color: var(--primary); font-size: 12px; font-weight: 800; letter-spacing: .05em; }
.service-card:hover { border-color: rgba(41,128,254,0.35); transform: translateY(-2px); transition: .2s ease; }

.feature-section {
    border-radius: 30px;
    padding: 24px;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
}
.feature-grid { display: grid; gap: 24px; align-items: center; }
.feature-media { border-radius: 26px; background: var(--primary-soft-2); border: 1px solid var(--line); padding: 18px; }
.feature-list, .check-list { padding: 0; margin: 16px 0 0; list-style: none; display: grid; gap: 10px; }
.feature-list li, .check-list li {
    position: relative;
    padding-left: 24px;
    color: var(--muted);
}
.feature-list li:before, .check-list li:before {
    content: '';
    position: absolute;
    left: 0;
    top: .72em;
    width: 9px;
    height: 9px;
    border-radius: 999px;
    background: var(--primary);
}
.digital-assets-hub { background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%); }
.web3-ecosystem-section { background: #ffffff; }
.hardware-wallet-section { background: linear-gradient(135deg, #f7fbff 0%, #ffffff 100%); }
.swap-service-section { background: linear-gradient(135deg, #ffffff 0%, #f4f7fb 100%); }
.privacy-boundary-section { background: var(--primary-soft-2); }
.submit-chain-section { background: #ffffff; }
.developer-center-section { background: linear-gradient(135deg, #f7fbff 0%, #ffffff 100%); }
.boundary-grid, .ecosystem-grid, .developer-grid, .risk-grid, .category-grid { display: grid; gap: 14px; }
.safety-panel {
    border: 1px solid rgba(41,128,254,0.18);
    border-radius: 24px;
    background: var(--white);
    padding: 20px;
}
.panel-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.panel-tags span {
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41,128,254,0.16);
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}
.code-panel {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    border-radius: 24px;
    border: 1px solid #dbe7f5;
    background: #fbfdff;
    padding: 18px;
    color: #344054;
    overflow: hidden;
}
.code-line { display: flex; gap: 12px; padding: 7px 0; border-bottom: 1px solid var(--line); }
.code-line:last-child { border-bottom: 0; }
.code-line em { color: var(--primary); font-style: normal; }
.process-steps { display: grid; gap: 14px; counter-reset: steps; }
.step-card { position: relative; padding-top: 52px; }
.step-card:before {
    counter-increment: steps;
    content: counter(steps, decimal-leading-zero);
    position: absolute;
    top: 18px;
    left: 20px;
    color: var(--primary);
    font-weight: 900;
}
.risk-card { border-left: 4px solid var(--primary); }
.risk-card .risk-label { color: var(--primary); font-size: 12px; font-weight: 800; }
.faq-list { display: grid; gap: 12px; }
.faq-item h3 { font-size: 18px; margin-bottom: 8px; }
.cta-section {
    text-align: center;
    border-radius: 30px;
    padding: 38px 22px;
    background: linear-gradient(135deg, #eef6ff 0%, #ffffff 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.cta-section p { max-width: 680px; margin: 0 auto 22px; }

.page-hero {
    width: min(980px, calc(100% - 32px));
    margin: 34px auto 0;
    padding: 28px;
    border-radius: 30px;
    border: 1px solid var(--line);
    background: linear-gradient(135deg, #ffffff 0%, #f2f8ff 100%);
    box-shadow: var(--shadow);
}
.page-hero h1 { font-size: clamp(32px, 7vw, 54px); }
.page-layout {
    width: min(1080px, calc(100% - 32px));
    margin: 28px auto 52px;
    display: grid;
    gap: 18px;
}
.article-body {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
}
.article-body h2 { font-size: 26px; margin-top: 24px; }
.article-body h2:first-child { margin-top: 0; }
.aside-panel {
    display: grid;
    gap: 14px;
    align-content: start;
}
.notice-box {
    border-radius: 22px;
    border: 1px solid rgba(41,128,254,0.18);
    background: var(--primary-soft-2);
    padding: 18px;
}
.table-like { display: grid; gap: 10px; margin-top: 14px; }
.table-like div { display: grid; gap: 6px; padding: 14px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); }
.download-only-card { text-align: center; padding: 26px; }

.site-footer {
    border-top: 1px solid var(--line);
    background: #ffffff;
    padding: 34px 0 20px;
}
.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 24px;
}
.footer-brand { display: flex; align-items: flex-start; gap: 14px; }
.footer-brand img { width: 42px; height: 42px; border-radius: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-links a { color: var(--muted); padding: 7px 10px; border-radius: 999px; background: var(--light); }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { width: min(1180px, calc(100% - 32px)); margin: 24px auto 0; color: var(--muted); font-size: 13px; }

@media (min-width: 640px) {
    .service-index { grid-template-columns: repeat(2, 1fr); }
    .risk-grid, .category-grid, .boundary-grid { grid-template-columns: repeat(2, 1fr); }
    .status-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
    .nav-toggle { display: none; }
    .main-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 4px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }
    .main-nav a { font-size: 14px; }
    .web3-dashboard-hero { padding: 42px; margin-top: 46px; }
    .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(390px, .9fr); gap: 42px; }
    .service-index { grid-template-columns: repeat(4, 1fr); }
    .service-card:nth-child(1), .service-card:nth-child(7) { grid-column: span 2; }
    .feature-section { padding: 36px; }
    .feature-grid { grid-template-columns: 1.05fr .95fr; }
    .feature-grid.reverse .feature-copy { order: 2; }
    .feature-grid.reverse .feature-media { order: 1; }
    .ecosystem-grid, .developer-grid { grid-template-columns: 1fr 1fr; }
    .risk-grid { grid-template-columns: repeat(3, 1fr); }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .page-layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
    .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
}

@media (min-width: 1120px) {
    .hero-panel { grid-template-columns: 1fr .88fr; }
    .status-grid { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
    .header-inner, .container, .section, .page-section, .web3-dashboard-hero, .page-hero, .page-layout, .footer-inner, .footer-bottom { width: calc(100% - 24px); }
    .web3-dashboard-hero, .page-hero, .feature-section, .article-body { border-radius: 22px; padding: 20px; }
    .download-btn { width: 100%; }
    .service-card, .info-card, .risk-card, .faq-item, .step-card, .page-card { padding: 18px; border-radius: 20px; }
}