:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-light: #F4F8FF;
    --text: #1F2937;
    --muted: #64748B;
    --line: #E5EAF2;
    --bg: #F7FAFE;
    --white: #FFFFFF;
    --soft-gray: #F3F6FA;
    --deep-gray: #334155;
    --shadow: 0 18px 45px rgba(31, 41, 55, .08);
    --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #fff 0%, var(--bg) 42%, #fff 100%);
    line-height: 1.72;
    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,.9);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}
.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand, .footer-brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { width: 38px; height: 38px; border-radius: 12px; object-fit: contain; }
.brand-text { font-weight: 800; letter-spacing: .2px; color: var(--deep-gray); }
.nav-toggle {
    border: 1px solid var(--line);
    background: var(--white);
    color: var(--deep-gray);
    width: 42px;
    height: 42px;
    border-radius: 14px;
    font-size: 20px;
}
.site-nav {
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 8px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 14px;
    box-shadow: var(--shadow);
}
.site-nav.open { display: flex; }
.site-nav a {
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--muted);
    font-weight: 650;
    font-size: 14px;
}
.site-nav a:hover, .site-nav a.active { background: var(--primary-soft); color: var(--primary); }

.content-container, .section, .page-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}
.app-hero {
    position: relative;
    padding: 56px 0 28px;
    overflow: hidden;
}
.app-hero::before {
    content: "";
    position: absolute;
    inset: 0 0 auto auto;
    width: 390px;
    height: 390px;
    background: radial-gradient(circle, rgba(41,128,254,.16), rgba(41,128,254,0) 65%);
    pointer-events: none;
}
.hero-grid { display: grid; gap: 36px; align-items: center; }
.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,.18);
    padding: 7px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 750;
}
h1, h2, h3 { line-height: 1.18; margin: 0; color: #172033; }
h1 { font-size: clamp(34px, 8vw, 64px); letter-spacing: -1.6px; margin-top: 18px; }
h2 { font-size: clamp(27px, 5vw, 42px); letter-spacing: -.8px; }
h3 { font-size: 20px; }
p { margin: 0; color: var(--muted); }
.hero-copy { font-size: 18px; margin: 18px 0 24px; max-width: 620px; }
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.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: 800;
    box-shadow: 0 12px 28px rgba(41,128,254,.26);
    border: 0;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(41,128,254,.32); }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.security-tags span {
    background: #fff;
    border: 1px solid var(--line);
    color: var(--deep-gray);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 700;
}
.app-visual {
    position: relative;
    background: linear-gradient(145deg, #F7FBFF, #FFFFFF);
    border: 1px solid var(--line);
    border-radius: 32px;
    padding: 22px;
    box-shadow: var(--shadow);
}
.app-visual img { margin: 0 auto; max-height: 520px; object-fit: contain; }
.floating-card {
    display: grid;
    gap: 3px;
    background: rgba(255,255,255,.94);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 13px 15px;
    box-shadow: 0 14px 34px rgba(31,41,55,.09);
    margin-top: 12px;
}
.floating-card strong { color: var(--deep-gray); font-size: 14px; }
.floating-card small { color: var(--muted); }

.ability-bar {
    display: grid;
    gap: 12px;
    margin: 28px auto 70px;
    background: rgba(255,255,255,.75);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 12px;
    box-shadow: 0 14px 36px rgba(31,41,55,.05);
}
.ability-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 16px;
}
.ability-item b { display: block; color: var(--primary); margin-bottom: 5px; }

.section { padding: 58px 0; }
.section-heading { max-width: 760px; margin-bottom: 28px; }
.section-heading p { margin-top: 12px; }
.feature-showcase, .ecosystem-grid, .risk-grid, .category-grid, .faq-grid {
    display: grid;
    gap: 18px;
}
.feature-card, .ecosystem-card, .risk-card, .faq-item, .info-card, .step-card, .article-card, .check-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 34px rgba(31,41,55,.05);
}
.feature-card {
    min-height: 320px;
    display: grid;
    gap: 16px;
    overflow: hidden;
}
.feature-card img { width: 100%; max-height: 240px; object-fit: contain; background: var(--primary-light); border-radius: 20px; padding: 12px; }
.text-link { color: var(--primary); font-weight: 800; display: inline-flex; align-items: center; gap: 4px; }

.product-section, .wallet-panel, .cold-wallet-panel, .swap-panel, .dapp-panel {
    display: grid;
    gap: 28px;
    align-items: center;
    border-radius: 32px;
    border: 1px solid var(--line);
    padding: 24px;
    background: var(--white);
    box-shadow: var(--shadow);
}
.cold-wallet-panel, .dapp-panel, .gradient-background {
    background: linear-gradient(145deg, #F4F8FF 0%, #FFFFFF 68%);
}
.product-section img, .wallet-panel img, .cold-wallet-panel img, .swap-panel img, .dapp-panel img {
    width: 100%;
    max-height: 430px;
    object-fit: contain;
    border-radius: 24px;
    background: var(--primary-light);
    padding: 14px;
}
.point-list, .check-list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; }
.point-list li, .check-list li {
    position: relative;
    padding-left: 28px;
    color: var(--deep-gray);
}
.point-list li::before, .check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .72em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px var(--primary-soft);
}
.process-steps { display: grid; gap: 16px; counter-reset: step; }
.step-card { position: relative; padding-top: 54px; }
.step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    top: 18px;
    left: 22px;
    color: var(--primary);
    font-weight: 900;
    letter-spacing: .8px;
}
.risk-card { border-top: 4px solid var(--primary); }
.risk-card em { display: block; color: var(--deep-gray); font-style: normal; font-weight: 800; margin: 8px 0 4px; }
.ecosystem-card { min-height: 188px; display: flex; flex-direction: column; justify-content: space-between; }
.faq-item h3 { margin-bottom: 8px; }
.cta-section {
    text-align: center;
    background: linear-gradient(135deg, #F3F8FF, #FFFFFF);
    border: 1px solid var(--line);
    border-radius: 34px;
    padding: 38px 22px;
    box-shadow: var(--shadow);
}
.cta-section p { max-width: 720px; margin: 12px auto 22px; }

.page-hero { padding: 54px 0 28px; }
.page-hero .summary { max-width: 800px; font-size: 17px; margin-top: 14px; }
.article-layout { display: grid; gap: 22px; align-items: start; padding-bottom: 66px; }
.article-main { display: grid; gap: 18px; }
.article-main p { color: var(--deep-gray); }
.side-panel { display: grid; gap: 16px; }
.check-grid { display: grid; gap: 14px; }
.mini-grid { display: grid; gap: 14px; }
.download-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    background: linear-gradient(135deg, #F4F8FF, #FFFFFF);
    border: 1px solid var(--line);
    border-radius: 26px;
    padding: 22px;
}
.download-page-grid { display: grid; gap: 22px; align-items: start; padding-bottom: 70px; }
.numbered { margin: 0; padding-left: 22px; color: var(--deep-gray); }
.numbered li { margin: 8px 0; }

.site-footer { background: #fff; border-top: 1px solid var(--line); margin-top: 40px; }
.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0;
    display: grid;
    gap: 22px;
}
.footer-logo { width: 42px; height: 42px; border-radius: 14px; object-fit: contain; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-links a { color: var(--muted); font-weight: 700; }
.footer-bottom { border-top: 1px solid var(--line); padding: 16px; text-align: center; color: var(--muted); font-size: 13px; }

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

@media (min-width: 960px) {
    .nav-toggle { 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 { padding: 9px 11px; }
    .hero-grid, .wallet-panel, .swap-panel, .dapp-panel, .product-section, .download-page-grid { grid-template-columns: 1fr 1fr; }
    .cold-wallet-panel { grid-template-columns: .92fr 1.08fr; }
    .cold-wallet-panel .panel-copy { order: 2; }
    .cold-wallet-panel .panel-media { order: 1; }
    .ability-bar { grid-template-columns: repeat(5, 1fr); }
    .feature-showcase { grid-template-columns: repeat(2, 1fr); }
    .ecosystem-grid { grid-template-columns: repeat(4, 1fr); }
    .risk-grid { grid-template-columns: repeat(3, 1fr); }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .article-layout { grid-template-columns: minmax(0, 1fr) 330px; }
    .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
    .floating-card { position: absolute; margin-top: 0; width: 210px; }
    .floating-card.card-assets { top: 34px; left: -22px; }
    .floating-card.card-cold { top: 145px; right: -20px; }
    .floating-card.card-swap { bottom: 118px; left: -18px; }
    .floating-card.card-dapp { bottom: 24px; right: 18px; }
}

@media (min-width: 1180px) {
    .site-nav a { padding: 10px 13px; }
}