:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-faint: #F5F9FF;
    --white: #ffffff;
    --gray-50: #F7F9FC;
    --gray-100: #EEF2F7;
    --gray-200: #DEE6F0;
    --gray-500: #667085;
    --gray-700: #344054;
    --gray-900: #101828;
    --shadow: 0 18px 50px rgba(16, 24, 40, 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", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--gray-900);
    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; }
main { min-height: 60vh; }
.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);
    border-bottom: 1px solid var(--gray-100);
    backdrop-filter: blur(14px);
}
.nav-wrap {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.logo, .footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: .02em;
}
.logo img, .footer-brand img { width: 36px; height: 36px; object-fit: contain; }
.nav-toggle { display: none; }
.nav-toggle-label {
    width: 44px;
    height: 44px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border: 1px solid var(--gray-200);
    border-radius: 14px;
    background: var(--white);
}
.nav-toggle-label span { width: 18px; height: 2px; background: var(--gray-900); border-radius: 999px; }
.site-nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: 76px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.site-nav a {
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--gray-700);
    font-weight: 650;
    font-size: 14px;
}
.site-nav a:hover { background: var(--primary-soft); color: var(--primary); }
.nav-toggle:checked ~ .site-nav { display: flex; }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    letter-spacing: .02em;
    box-shadow: 0 14px 30px rgba(41, 128, 254, .23);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(41, 128, 254, .28); }

.section-eyebrow, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41, 128, 254, .14);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 800;
}
.section-title { margin: 12px 0 12px; font-size: clamp(28px, 4vw, 44px); line-height: 1.16; letter-spacing: -0.04em; }
.section-subtitle { margin: 0; color: var(--gray-500); max-width: 720px; }
.section-head { margin-bottom: 24px; }

.web3-dashboard-hero {
    position: relative;
    padding: 44px 0 32px;
    overflow: hidden;
}
.web3-dashboard-hero::before {
    content: "";
    position: absolute;
    inset: -20% -15% auto auto;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(41,128,254,.18), rgba(41,128,254,0) 68%);
    pointer-events: none;
}
.hero-grid {
    display: grid;
    gap: 26px;
    align-items: center;
}
.hero-copy {
    background: rgba(255,255,255,.72);
    border: 1px solid var(--gray-100);
    border-radius: 30px;
    padding: 28px;
    box-shadow: var(--shadow);
}
.hero-copy h1 { margin: 14px 0 16px; font-size: clamp(34px, 8vw, 64px); line-height: 1.05; letter-spacing: -0.06em; }
.hero-copy p { margin: 0 0 22px; color: var(--gray-500); font-size: 16px; }
.safe-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.safe-tags span {
    display: inline-flex;
    padding: 7px 11px;
    border-radius: 999px;
    background: var(--gray-50);
    color: var(--gray-700);
    border: 1px solid var(--gray-100);
    font-size: 13px;
    font-weight: 700;
}
.hero-console {
    position: relative;
    display: grid;
    gap: 16px;
}
.device-card {
    position: relative;
    overflow: hidden;
    min-height: 320px;
    display: grid;
    place-items: center;
    padding: 26px;
    border-radius: 32px;
    background: linear-gradient(145deg, #ffffff, #F3F8FF);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow);
}
.device-card img { max-height: 420px; object-fit: contain; filter: drop-shadow(0 28px 36px rgba(16,24,40,.12)); }
.status-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.status-card {
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 18px;
    box-shadow: 0 10px 24px rgba(16,24,40,.05);
}
.status-card strong { display: block; color: var(--gray-900); font-size: 14px; }
.status-card span { color: var(--gray-500); font-size: 12px; }

.service-index { padding: 30px 0; }
.service-grid, .category-grid { display: grid; gap: 14px; }
.service-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 184px;
    padding: 20px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 22px;
    box-shadow: 0 12px 28px rgba(16,24,40,.05);
}
.service-card .tag, .mini-tag {
    width: fit-content;
    color: var(--primary);
    background: var(--primary-soft);
    border-radius: 999px;
    padding: 4px 9px;
    font-size: 12px;
    font-weight: 800;
}
.service-card h3 { margin: 0; font-size: 20px; }
.service-card p { margin: 0; color: var(--gray-500); font-size: 14px; }
.text-link { margin-top: auto; color: var(--primary); font-weight: 800; }

.feature-section { padding: 34px 0; }
.feature-card, .digital-assets-hub, .web3-ecosystem-section, .hardware-wallet-section, .swap-service-section, .privacy-boundary-section, .submit-chain-section, .developer-center-section {
    display: grid;
    gap: 22px;
    align-items: center;
    padding: 24px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 30px;
    box-shadow: var(--shadow);
}
.hardware-wallet-section, .privacy-boundary-section { background: linear-gradient(145deg, #F7FAFF, #ffffff); }
.feature-content h2 { margin: 10px 0; font-size: clamp(26px, 4vw, 40px); line-height: 1.18; letter-spacing: -0.04em; }
.feature-content p { color: var(--gray-500); margin: 0 0 16px; }
.feature-list { display: grid; gap: 10px; padding: 0; margin: 18px 0; list-style: none; }
.feature-list li {
    padding: 12px 14px;
    border-radius: 16px;
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    color: var(--gray-700);
}
.feature-media {
    border-radius: 26px;
    padding: 24px;
    background: linear-gradient(145deg, #EEF6FF, #ffffff);
    border: 1px solid var(--gray-100);
    min-height: 260px;
    display: grid;
    place-items: center;
}
.feature-media img { max-height: 360px; object-fit: contain; }

.info-panel, .safety-panel {
    padding: 20px;
    border-radius: 22px;
    background: var(--primary-faint);
    border: 1px solid var(--gray-100);
}
.info-panel h3, .safety-panel h3 { margin: 0 0 10px; }
.info-panel p, .safety-panel p { margin: 0; color: var(--gray-500); }
.panel-grid { display: grid; gap: 12px; }
.panel-item {
    padding: 16px;
    border-radius: 18px;
    background: var(--white);
    border: 1px solid var(--gray-100);
}
.panel-item strong { display: block; margin-bottom: 5px; }
.panel-item span { color: var(--gray-500); font-size: 14px; }
.code-panel {
    padding: 20px;
    border-radius: 22px;
    background: #F6F8FC;
    border: 1px solid var(--gray-100);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    color: var(--gray-700);
    overflow-wrap: anywhere;
}
.code-panel .blue { color: var(--primary); font-weight: 800; }

.process-steps { padding: 40px 0; }
.steps-grid { display: grid; gap: 14px; counter-reset: step; }
.step-card {
    position: relative;
    padding: 20px;
    border-radius: 22px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    box-shadow: 0 10px 26px rgba(16,24,40,.05);
}
.step-number {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    color: var(--white);
    background: var(--primary);
    font-weight: 900;
    margin-bottom: 12px;
}
.step-card h3 { margin: 0 0 8px; }
.step-card p { margin: 0 0 12px; color: var(--gray-500); }

.risk-section { padding: 40px 0; }
.risk-grid { display: grid; gap: 14px; }
.risk-card {
    padding: 18px;
    border-radius: 22px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-left: 4px solid var(--primary);
}
.risk-card h3 { margin: 0 0 8px; font-size: 18px; }
.risk-card p { margin: 0 0 10px; color: var(--gray-500); }
.risk-card small { display: block; color: var(--gray-700); font-weight: 750; }

.faq-section { padding: 40px 0; }
.faq-list { display: grid; gap: 12px; }
.faq-item {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 20px;
    padding: 18px;
}
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--gray-500); }

.cta-section { padding: 42px 0 64px; }
.cta-card {
    text-align: center;
    padding: 30px 20px;
    border-radius: 30px;
    background: linear-gradient(135deg, #F1F7FF, #ffffff);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow);
}
.cta-card h2 { margin: 0 0 10px; font-size: clamp(26px, 5vw, 42px); letter-spacing: -0.04em; }
.cta-card p { margin: 0 auto 22px; color: var(--gray-500); max-width: 680px; }

.page-hero { padding: 42px 0 20px; }
.page-hero-card {
    padding: 26px;
    border-radius: 30px;
    background: linear-gradient(145deg, #ffffff, #F4F9FF);
    border: 1px solid var(--gray-100);
    box-shadow: var(--shadow);
}
.page-hero h1 { margin: 14px 0 12px; font-size: clamp(32px, 6vw, 54px); line-height: 1.08; letter-spacing: -0.05em; }
.page-hero p { margin: 0; color: var(--gray-500); max-width: 800px; }
.page-layout { padding: 22px 0 58px; }
.content-layout { display: grid; gap: 20px; }
.article-card {
    padding: 24px;
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 28px;
    box-shadow: 0 12px 32px rgba(16,24,40,.05);
}
.article-card h2 { margin: 0 0 12px; font-size: clamp(24px, 4vw, 34px); }
.article-card h3 { margin: 22px 0 8px; }
.article-card p { color: var(--gray-500); margin: 0 0 14px; }
.article-card ul, .article-card ol { margin: 12px 0 20px; padding-left: 22px; color: var(--gray-700); }
.article-card li { margin: 7px 0; }
.sidebar { display: grid; gap: 14px; }
.sidebar-card {
    padding: 20px;
    border-radius: 22px;
    background: var(--primary-faint);
    border: 1px solid var(--gray-100);
}
.sidebar-card h3 { margin: 0 0 8px; }
.sidebar-card p { margin: 0 0 12px; color: var(--gray-500); }
.check-list { display: grid; gap: 10px; padding: 0; list-style: none; margin: 14px 0 0; }
.check-list li {
    padding: 12px;
    border-radius: 14px;
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
}
.download-inline { margin-top: 22px; }

.download-page .article-card { text-align: left; }
.download-steps { display: grid; gap: 12px; margin: 20px 0; }
.download-step {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 12px;
    align-items: start;
    padding: 14px;
    border-radius: 18px;
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
}
.download-step span {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    color: var(--white);
    background: var(--primary);
    border-radius: 12px;
    font-weight: 900;
}
.download-step h3 { margin: 0 0 4px; }
.download-step p { margin: 0; }

.site-footer {
    background: #F7F9FC;
    border-top: 1px solid var(--gray-100);
    padding: 38px 0 0;
}
.footer-grid { display: grid; gap: 24px; }
.site-footer p { color: var(--gray-500); margin: 12px 0 0; }
.site-footer h3 { margin: 0 0 10px; font-size: 16px; }
.site-footer a { display: block; color: var(--gray-500); margin: 8px 0; }
.site-footer a:hover { color: var(--primary); }
.footer-bottom {
    margin-top: 30px;
    padding: 18px 16px;
    text-align: center;
    color: var(--gray-500);
    border-top: 1px solid var(--gray-100);
    font-size: 14px;
}

@media (min-width: 640px) {
    .service-grid, .category-grid { grid-template-columns: repeat(2, 1fr); }
    .status-grid { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
    .nav-toggle-label { display: none; }
    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 4px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }
    .site-nav a { font-size: 14px; padding: 8px 10px; }
    .web3-dashboard-hero { padding: 66px 0 44px; }
    .hero-grid { grid-template-columns: 1.02fr .98fr; gap: 28px; }
    .hero-copy { padding: 42px; }
    .hero-copy p { font-size: 18px; }
    .service-grid { grid-template-columns: repeat(4, 1fr); }
    .service-card:nth-child(1), .service-card:nth-child(7) { grid-column: span 2; }
    .digital-assets-hub, .web3-ecosystem-section, .hardware-wallet-section, .swap-service-section, .submit-chain-section, .developer-center-section { grid-template-columns: 1fr 1fr; padding: 34px; }
    .hardware-wallet-section .feature-media, .swap-service-section .feature-media { order: -1; }
    .privacy-boundary-section { grid-template-columns: .85fr 1.15fr; padding: 34px; }
    .panel-grid { grid-template-columns: repeat(3, 1fr); }
    .steps-grid { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
    .content-layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
    .article-card { padding: 34px; }
    .sidebar { position: sticky; top: 88px; }
    .footer-grid { grid-template-columns: 1.2fr .6fr .6fr; }
}

@media (min-width: 1100px) {
    .site-nav a { padding: 8px 12px; }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 380px) {
    .container { width: min(100% - 24px, 1120px); }
    .hero-copy, .page-hero-card, .article-card { padding: 20px; }
    .status-grid { grid-template-columns: 1fr; }
    .download-btn { width: 100%; }
}