:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-light: #F5F9FF;
    --text: #1F2937;
    --muted: #667085;
    --light: #F4F7FB;
    --line: #E5EAF2;
    --white: #FFFFFF;
    --dark: #111827;
    --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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #ffffff 0%, #f7faff 42%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 16px; color: var(--muted); }
h1, h2, h3 { margin: 0; color: var(--dark); line-height: 1.22; }
h1 { font-size: clamp(34px, 8vw, 64px); letter-spacing: -1.6px; }
h2 { font-size: clamp(26px, 5vw, 42px); letter-spacing: -0.8px; }
h3 { font-size: 20px; }
ul, ol { margin: 0; padding-left: 20px; color: var(--muted); }
li + li { margin-top: 8px; }

.container { width: min(100% - 32px, 1180px); margin: 0 auto; }
.section { padding: 72px 0; }
.section-tight { padding: 42px 0; }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading p { margin-top: 12px; font-size: 17px; }
.gradient-bg { background: radial-gradient(circle at 20% 0%, rgba(41,128,254,.13), transparent 32%), linear-gradient(180deg, #f8fbff 0%, #ffffff 100%); }
.badge, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 13px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 18px;
}
.category-badge::before, .badge::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(229,234,242,.86);
}
.header-inner {
    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: 900;
    color: var(--dark);
    letter-spacing: -.2px;
}
.logo img, .footer-logo img { width: 38px; height: 38px; border-radius: 12px; }
.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--white);
    color: var(--dark);
    font-size: 22px;
}
.main-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    padding: 12px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.main-nav.is-open { display: grid; gap: 4px; }
.main-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    color: #344054;
    font-weight: 700;
    font-size: 14px;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); background: var(--primary-soft); }

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41,128,254,.24);
    transition: transform .18s ease, box-shadow .18s ease;
    white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(41,128,254,.30); }

.app-hero {
    padding: 58px 0 42px;
    position: relative;
    overflow: hidden;
}
.app-hero::before {
    content: '';
    position: absolute;
    inset: -180px -120px auto auto;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(41,128,254,.18), transparent 68%);
    pointer-events: none;
}
.hero-grid {
    display: grid;
    gap: 34px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-copy p { font-size: 18px; max-width: 640px; margin: 18px 0 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.trust-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.trust-tags span {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255,255,255,.86);
    color: #475467;
    font-size: 13px;
    font-weight: 700;
}
.app-visual {
    position: relative;
    min-height: 430px;
    display: grid;
    place-items: center;
    padding: 22px;
    border-radius: 34px;
    background: linear-gradient(145deg, #ffffff 0%, #eff6ff 100%);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.app-visual .phone-img { max-height: 430px; margin: 0 auto; filter: drop-shadow(0 24px 28px rgba(16,24,40,.14)); }
.floating-card {
    background: rgba(255,255,255,.95);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 13px 15px;
    box-shadow: 0 16px 38px rgba(16,24,40,.10);
    color: #344054;
    font-weight: 750;
}
.floating-card small { display: block; color: var(--muted); font-weight: 600; font-size: 12px; margin-top: 3px; }
.app-visual .floating-card { margin-top: 10px; width: 100%; }

.ability-bar {
    display: grid;
    gap: 12px;
    margin-top: 22px;
}
.ability-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 18px;
    box-shadow: 0 8px 26px rgba(16,24,40,.04);
}
.ability-item strong { color: var(--primary); display: block; margin-bottom: 6px; }
.ability-item span { color: var(--muted); font-size: 14px; }

.feature-showcase {
    display: grid;
    gap: 18px;
}
.feature-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 10px 32px rgba(16,24,40,.05);
    display: grid;
    gap: 16px;
    overflow: hidden;
}
.feature-card img { border-radius: 20px; background: var(--primary-light); }
.feature-card a:not(.download-btn), .text-link { color: var(--primary); font-weight: 800; }

.product-section, .wallet-panel, .cold-wallet-panel, .swap-panel, .dapp-panel {
    display: grid;
    gap: 28px;
    align-items: center;
    padding: 28px;
    border-radius: 30px;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: 0 14px 42px rgba(16,24,40,.05);
}
.cold-wallet-panel { background: linear-gradient(145deg, #F5F9FF 0%, #FFFFFF 100%); }
.swap-panel { background: linear-gradient(145deg, #FFFFFF 0%, #F7FAFF 100%); }
.dapp-panel { background: radial-gradient(circle at 90% 0%, rgba(41,128,254,.12), transparent 28%), #fff; }
.panel-image { padding: 16px; border-radius: 26px; background: var(--primary-light); border: 1px solid var(--line); }
.panel-image img { border-radius: 20px; margin: 0 auto; }
.check-list, .mini-list {
    display: grid;
    gap: 10px;
    margin: 18px 0;
    padding: 0;
    list-style: none;
}
.check-list li, .mini-list li {
    position: relative;
    padding: 12px 14px 12px 42px;
    background: #F9FBFE;
    border: 1px solid var(--line);
    border-radius: 16px;
    color: #475467;
}
.check-list li::before, .mini-list li::before {
    content: '✓';
    position: absolute;
    left: 14px;
    top: 11px;
    width: 20px;
    height: 20px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 900;
}

.ecosystem-grid, .category-grid {
    display: grid;
    gap: 14px;
}
.eco-card, .category-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 20px;
    box-shadow: 0 8px 26px rgba(16,24,40,.04);
}
.eco-card h3, .category-card h3 { margin-bottom: 8px; }
.eco-card p, .category-card p { font-size: 15px; }
.eco-card a, .category-card a { color: var(--primary); font-weight: 800; }

.process-steps {
    display: grid;
    gap: 14px;
    counter-reset: step;
}
.process-step {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 22px;
    position: relative;
    overflow: hidden;
}
.process-step::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-bottom: 12px;
}
.process-step a { color: var(--primary); font-weight: 800; }

.risk-grid {
    display: grid;
    gap: 14px;
}
.risk-card {
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--white);
    padding: 20px;
    box-shadow: 0 8px 26px rgba(16,24,40,.04);
    position: relative;
}
.risk-card::before {
    content: '';
    position: absolute;
    left: 20px;
    right: 20px;
    top: 0;
    height: 4px;
    border-radius: 999px;
    background: var(--primary);
}
.risk-card strong { display: block; margin: 10px 0 8px; color: var(--dark); }
.risk-card span { display: block; color: var(--muted); font-size: 15px; }
.risk-card a { display: inline-block; margin-top: 10px; color: var(--primary); font-weight: 800; }

.faq-list { display: grid; gap: 14px; }
.faq-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 22px;
}
.faq-item h3 { margin-bottom: 8px; }

.cta-section {
    text-align: center;
    background: linear-gradient(135deg, #F5F9FF 0%, #FFFFFF 100%);
    border: 1px solid var(--line);
    border-radius: 32px;
    padding: 38px 22px;
    box-shadow: var(--shadow);
}
.cta-section p { max-width: 720px; margin: 14px auto 22px; }

.page-hero {
    padding: 58px 0 28px;
    background: radial-gradient(circle at 85% 0%, rgba(41,128,254,.13), transparent 32%), #fff;
}
.page-hero .container { max-width: 980px; }
.page-hero p { font-size: 18px; margin-top: 16px; }
.content-layout {
    display: grid;
    gap: 22px;
    align-items: start;
}
.article-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 26px;
    padding: 24px;
    box-shadow: 0 12px 34px rgba(16,24,40,.05);
}
.article-card + .article-card { margin-top: 18px; }
.tip-box, .safety-panel {
    background: #F5F9FF;
    border: 1px solid #DCEBFF;
    border-radius: 22px;
    padding: 20px;
}
.sidebar-panel {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 22px;
    position: sticky;
    top: 96px;
    box-shadow: 0 10px 32px rgba(16,24,40,.05);
}
.sidebar-panel a { display: block; padding: 10px 0; color: var(--primary); font-weight: 800; }
.download-note {
    margin-top: 20px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}
.download-page-grid {
    display: grid;
    gap: 18px;
}
.download-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 12px 34px rgba(16,24,40,.05);
}

.site-footer {
    padding: 54px 0 28px;
    background: #F7FAFE;
    border-top: 1px solid var(--line);
}
.footer-grid { display: grid; gap: 28px; }
.site-footer h3 { font-size: 16px; margin-bottom: 12px; }
.site-footer a:not(.footer-logo) { display: block; color: var(--muted); margin: 8px 0; }
.site-footer p { font-size: 14px; }
.footer-bottom { border-top: 1px solid var(--line); margin-top: 30px; padding-top: 18px; }

@media (min-width: 640px) {
    .ability-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .feature-showcase, .ecosystem-grid, .category-grid, .risk-grid, .download-page-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 920px) {
    .nav-toggle { display: none; }
    .main-nav {
        display: flex;
        align-items: center;
        position: static;
        padding: 0;
        background: transparent;
        border: 0;
        border-radius: 0;
        box-shadow: none;
        gap: 2px;
    }
    .main-nav a { padding: 9px 12px; }
    .hero-grid { grid-template-columns: 1.05fr .95fr; }
    .app-hero { padding: 82px 0 54px; }
    .app-visual { min-height: 560px; }
    .app-visual .floating-card { position: absolute; width: 188px; margin: 0; }
    .float-asset { left: -28px; top: 86px; }
    .float-cold { right: -18px; top: 116px; }
    .float-swap { left: 10px; bottom: 92px; }
    .float-dapp { right: 20px; bottom: 70px; }
    .ability-bar { grid-template-columns: repeat(5, minmax(0, 1fr)); }
    .feature-showcase { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .wallet-panel, .cold-wallet-panel, .swap-panel, .dapp-panel, .product-section { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 42px; }
    .cold-wallet-panel .panel-image { order: -1; }
    .ecosystem-grid, .category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .content-layout { grid-template-columns: minmax(0, 1fr) 320px; }
    .article-card { padding: 32px; }
    .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

@media (min-width: 1180px) {
    .main-nav a { padding: 9px 14px; }
}