:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --blue-gray: #F4F8FC;
    --surface: #FFFFFF;
    --surface-soft: #F7F9FC;
    --line: #E5ECF5;
    --text: #1D2939;
    --muted: #667085;
    --deep: #101828;
    --shadow: 0 18px 48px rgba(41, 128, 254, .10);
    --radius-lg: 32px;
    --radius-md: 24px;
    --radius-sm: 18px;
}
* { 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, #FFFFFF 0%, #F8FBFF 45%, #FFFFFF 100%);
    line-height: 1.72;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
main { min-height: 70vh; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 58px 0; }
.section-tight { padding: 38px 0; }
.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, .16);
    border-radius: 999px;
    padding: 7px 13px;
    font-size: 14px;
    font-weight: 700;
}
.section-title { margin: 14px 0 12px; font-size: clamp(28px, 4vw, 48px); line-height: 1.15; color: var(--deep); letter-spacing: -0.04em; }
.section-lead { margin: 0; color: var(--muted); font-size: 17px; max-width: 760px; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(229,236,245,.82);
}
.nav-shell {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--deep); letter-spacing: .02em; }
.brand img { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 10px 24px rgba(41,128,254,.16); }
.main-nav { display: none; align-items: center; gap: 4px; }
.main-nav a { color: #344054; font-weight: 650; font-size: 14px; padding: 9px 12px; border-radius: 999px; }
.main-nav a:hover, .main-nav a.active { color: var(--primary); background: var(--primary-soft); }
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 999px;
    padding: 8px 14px;
    color: var(--deep);
    font-weight: 700;
}
.main-nav.open {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    position: absolute;
    left: 14px;
    right: 14px;
    top: 76px;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}
.launch-hero {
    padding: 48px 0 36px;
    background:
        radial-gradient(circle at 82% 10%, rgba(41,128,254,.16), transparent 34%),
        linear-gradient(180deg, #FFFFFF 0%, #F3F8FF 100%);
}
.hero-grid { display: grid; grid-template-columns: 1fr; gap: 34px; align-items: center; }
.hero-copy h1 { margin: 16px 0 16px; font-size: clamp(38px, 8vw, 76px); line-height: 1.02; color: var(--deep); letter-spacing: -0.065em; }
.hero-copy p { color: var(--muted); font-size: 17px; margin: 0 0 22px; max-width: 640px; }
.security-tags, .hero-tags, .mini-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.security-tags span, .hero-tags span, .mini-tags span {
    background: rgba(255,255,255,.82);
    color: #344054;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 700;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    min-width: 136px;
    padding: 13px 22px;
    color: #fff;
    background: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 999px;
    font-weight: 800;
    box-shadow: 0 16px 32px rgba(41, 128, 254, .25);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 22px 38px rgba(41, 128, 254, .30); }
.hero-visual, .app-showcase {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 390px;
}
.phone-stage {
    position: relative;
    width: min(370px, 90vw);
    border-radius: 36px;
    padding: 18px;
    background: rgba(255,255,255,.64);
    border: 1px solid rgba(255,255,255,.9);
    box-shadow: 0 28px 60px rgba(41,128,254,.16);
}
.phone-stage:before {
    content: "";
    position: absolute;
    inset: -24px;
    border-radius: 48px;
    background: linear-gradient(140deg, rgba(41,128,254,.16), rgba(255,255,255,0));
    z-index: -1;
}
.phone-stage img { border-radius: 28px; }
.float-label {
    position: absolute;
    background: rgba(255,255,255,.92);
    border: 1px solid var(--line);
    color: #344054;
    border-radius: 18px;
    padding: 10px 12px;
    font-size: 13px;
    font-weight: 800;
    box-shadow: 0 16px 32px rgba(16,24,40,.08);
}
.float-label b { color: var(--primary); }
.label-assets { left: 0; top: 15%; }
.label-cold { right: -2px; top: 30%; }
.label-swap { left: 8%; bottom: 18%; }
.label-dapp { right: 7%; bottom: 8%; }
.highlight-bar, .category-grid, .risk-grid, .faq-grid, .cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.highlight-card, .category-card, .risk-card, .faq-item, .info-card, .step-card, .check-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: 0 10px 32px rgba(16,24,40,.04);
}
.highlight-card .mark, .category-card .mark {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 12px;
    color: var(--primary);
    background: var(--primary-soft);
    font-weight: 900;
    margin-bottom: 12px;
}
.highlight-card h3, .category-card h3, .risk-card h3, .faq-item h3, .info-card h3 { margin: 0 0 8px; color: var(--deep); font-size: 20px; }
.highlight-card p, .category-card p, .risk-card p, .faq-item p, .info-card p, .step-card p, .check-card p { margin: 0; color: var(--muted); }
.text-link { display: inline-flex; margin-top: 14px; color: var(--primary); font-weight: 800; }
.launch-card, .big-feature-card {
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}
.big-feature-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 24px;
}
.feature-copy { padding: 28px; }
.feature-copy h2 { margin: 10px 0 12px; color: var(--deep); font-size: clamp(28px, 5vw, 46px); line-height: 1.12; letter-spacing: -0.04em; }
.feature-copy p { color: var(--muted); margin: 0 0 18px; }
.feature-points { display: grid; gap: 10px; margin: 18px 0; padding: 0; list-style: none; }
.feature-points li { padding-left: 28px; position: relative; color: #344054; }
.feature-points li:before {
    content: "";
    position: absolute;
    left: 0;
    top: .62em;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(41,128,254,.12);
}
.feature-media {
    min-height: 280px;
    display: grid;
    place-items: center;
    padding: 26px;
    background: linear-gradient(140deg, #F5F9FF, #FFFFFF);
}
.feature-media img { max-height: 430px; border-radius: 28px; filter: drop-shadow(0 26px 38px rgba(41,128,254,.16)); }
.cold-wallet-feature .feature-media, .dapp-feature .feature-media { background: linear-gradient(145deg, #EEF6FF, #F8FBFF); }
.swap-feature .feature-media { background: linear-gradient(145deg, #F7FAFF, #EDF5FF); }
.process-steps { display: grid; gap: 14px; counter-reset: step; margin-top: 24px; }
.step-card { position: relative; padding-left: 70px; min-height: 112px; }
.step-card:before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 22px;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    font-size: 13px;
}
.step-card h3 { margin: 0 0 6px; color: var(--deep); }
.risk-card { border-left: 4px solid var(--primary); }
.risk-card strong { display: block; color: var(--primary); margin-top: 10px; }
.app-category-center {
    padding: 28px;
    background: linear-gradient(160deg, #F2F7FF, #FFFFFF 62%);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
}
.cta-section {
    text-align: center;
    padding: 48px 24px;
    background: linear-gradient(145deg, #EAF3FF, #FFFFFF);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}
.cta-section h2 { margin: 0 0 12px; font-size: clamp(28px, 5vw, 46px); color: var(--deep); letter-spacing: -0.04em; }
.cta-section p { margin: 0 auto 22px; color: var(--muted); max-width: 680px; }
.page-hero {
    padding: 50px 0 28px;
    background: radial-gradient(circle at 82% 0%, rgba(41,128,254,.14), transparent 34%), linear-gradient(180deg, #fff, #F4F8FF);
}
.page-hero-grid { display: grid; gap: 22px; align-items: center; }
.page-hero h1 { margin: 15px 0 14px; color: var(--deep); font-size: clamp(34px, 7vw, 60px); line-height: 1.08; letter-spacing: -0.055em; }
.page-hero p { color: var(--muted); margin: 0; font-size: 17px; max-width: 760px; }
.content-layout { display: grid; grid-template-columns: 1fr; gap: 24px; align-items: start; }
.article-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 26px;
    box-shadow: 0 14px 36px rgba(16,24,40,.04);
}
.article-card h2 { color: var(--deep); margin: 4px 0 12px; font-size: 28px; letter-spacing: -0.03em; }
.article-card p { color: #475467; margin: 0 0 16px; }
.article-card ul, .article-card ol { color: #475467; padding-left: 22px; margin: 12px 0 18px; }
.article-card li { margin: 8px 0; }
.side-panel, .safety-panel {
    background: linear-gradient(180deg, #F5F9FF, #FFFFFF);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: 0 10px 32px rgba(16,24,40,.04);
}
.side-panel h3, .safety-panel h3 { margin: 0 0 12px; color: var(--deep); }
.side-panel a { display: block; padding: 10px 0; color: var(--primary); font-weight: 800; border-top: 1px solid var(--line); }
.download-strip { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.steps-list { display: grid; gap: 12px; margin: 18px 0; }
.steps-list div { background: var(--blue-gray); border: 1px solid var(--line); border-radius: 18px; padding: 15px; }
.notice { padding: 18px; border-radius: 20px; background: var(--primary-soft); border: 1px solid rgba(41,128,254,.18); color: #344054; margin: 18px 0; }
.download-page-card { max-width: 820px; margin: 0 auto; text-align: center; }
.download-page-card .steps-list { text-align: left; }
.site-footer { margin-top: 54px; background: #F5F8FC; border-top: 1px solid var(--line); padding: 38px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.footer-brand { margin-bottom: 12px; }
.site-footer p { color: var(--muted); margin: 0; max-width: 520px; }
.footer-links { display: grid; gap: 8px; }
.footer-links a { color: #475467; font-weight: 700; }
.footer-links a:hover { color: var(--primary); }
.copyright { margin-top: 28px; padding: 18px; text-align: center; color: var(--muted); border-top: 1px solid var(--line); font-size: 14px; }
@media (min-width: 680px) {
    .highlight-bar, .category-grid, .risk-grid, .faq-grid, .cards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1.4fr .8fr .8fr; }
}
@media (min-width: 980px) {
    .nav-toggle { display: none; }
    .main-nav, .main-nav.open { display: flex; position: static; padding: 0; background: transparent; border: 0; box-shadow: none; }
    .launch-hero { padding: 76px 0 52px; }
    .hero-grid { grid-template-columns: 1.02fr .98fr; gap: 50px; }
    .highlight-bar { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .big-feature-card { grid-template-columns: 1fr 1fr; }
    .big-feature-card.reverse .feature-copy { order: 2; }
    .big-feature-card.reverse .feature-media { order: 1; }
    .feature-copy { padding: 46px; }
    .category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .content-layout { grid-template-columns: minmax(0, 1fr) 330px; }
    .side-panel { position: sticky; top: 96px; }
    .page-hero-grid { grid-template-columns: 1fr 360px; }
    .section { padding: 76px 0; }
}
@media (max-width: 420px) {
    .container { width: min(100% - 24px, 1120px); }
    .feature-copy, .article-card, .app-category-center { padding: 20px; }
    .float-label { position: static; margin: 8px; display: inline-flex; }
    .hero-tags { justify-content: center; }
    .hero-visual { min-height: auto; }
}