:root {
    --primary: #2980FE;
    --primary-dark: #1767d5;
    --primary-soft: #edf5ff;
    --primary-glow: rgba(41, 128, 254, 0.18);
    --white: #ffffff;
    --bg: #f7f9fc;
    --bg-blue: #f1f6ff;
    --line: #e5ebf3;
    --text: #1f2937;
    --muted: #637083;
    --deep: #111827;
    --card-shadow: 0 18px 45px rgba(31, 41, 55, 0.08);
    --soft-shadow: 0 10px 28px rgba(41, 128, 254, 0.10);
    --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    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, 0.94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(18px);
}
.nav-container {
    width: min(1160px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--deep); letter-spacing: -0.02em; }
.logo img { width: 38px; height: 38px; border-radius: 12px; object-fit: contain; }
.logo span { font-size: 18px; }
.nav-toggle {
    border: 1px solid var(--line);
    background: var(--white);
    width: 44px;
    height: 42px;
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 0 11px;
}
.nav-toggle span { height: 2px; background: var(--deep); border-radius: 99px; }
.main-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}
.main-nav.open { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.main-nav a { padding: 10px 12px; border-radius: 12px; color: var(--muted); font-size: 14px; }
.main-nav a.active, .main-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.container { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }
.narrow-container { width: min(890px, calc(100% - 32px)); margin: 0 auto; }
.page-section { padding: 56px 0; }
.section-head { margin-bottom: 24px; }
.section-kicker, .badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    background: var(--primary-soft);
    border: 1px solid rgba(41, 128, 254, 0.15);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}
.section-head h2, .page-title h1, .product-copy h1 { color: var(--deep); line-height: 1.18; letter-spacing: -0.04em; margin: 14px 0 12px; }
.section-head h2 { font-size: clamp(28px, 5vw, 46px); }
.section-head p, .page-title p, .product-copy p { color: var(--muted); margin: 0; }
.gradient-bg { background: linear-gradient(135deg, #ffffff 0%, #f0f6ff 58%, #edf5ff 100%); }
.product-hero {
    position: relative;
    overflow: hidden;
    padding: 52px 0 42px;
    background:
        radial-gradient(circle at 88% 20%, rgba(41,128,254,0.16), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
}
.product-hero::before { content: ""; position: absolute; inset: auto -120px -210px auto; width: 420px; height: 420px; border-radius: 50%; background: rgba(41,128,254,0.12); }
.hero-grid { display: grid; gap: 32px; align-items: center; position: relative; }
.product-copy h1 { font-size: clamp(36px, 9vw, 66px); max-width: 760px; }
.product-copy p { font-size: 16px; max-width: 680px; }
.download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    border: 1px solid var(--primary);
    box-shadow: 0 12px 28px rgba(41,128,254,0.26);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 38px rgba(41,128,254,0.32); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 26px 0 18px; }
.trust-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.trust-tags span { padding: 8px 12px; border: 1px solid var(--line); background: rgba(255,255,255,0.84); border-radius: 999px; color: var(--muted); font-size: 13px; }
.app-visual { position: relative; min-height: 420px; display: grid; place-items: center; }
.phone-frame {
    width: min(320px, 86vw);
    padding: 18px;
    border-radius: 38px;
    background: linear-gradient(145deg, #ffffff, #eef5ff);
    border: 1px solid rgba(41,128,254,0.12);
    box-shadow: var(--card-shadow);
}
.phone-frame img { border-radius: 30px; object-fit: cover; width: 100%; }
.float-card {
    position: absolute;
    padding: 12px 14px;
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--soft-shadow);
    font-size: 13px;
    color: var(--deep);
}
.float-card strong { display: block; font-size: 15px; color: var(--primary); }
.card-assets { left: 0; top: 48px; }
.card-cold { right: 0; top: 108px; }
.card-swap { left: 8px; bottom: 88px; }
.card-dapp { right: 10px; bottom: 34px; }
.feature-shortcuts { display: grid; grid-template-columns: 1fr; gap: 14px; }
.feature-card, .category-card, .risk-card, .faq-item, .info-card, .step-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 8px 26px rgba(31, 41, 55, 0.04);
}
.feature-card { padding: 20px; display: grid; gap: 8px; }
.icon-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 14px; background: var(--primary-soft); color: var(--primary); font-weight: 900; }
.feature-card h3, .category-card h3, .risk-card h3, .info-card h3, .step-card h3 { margin: 0; color: var(--deep); line-height: 1.35; }
.feature-card p, .category-card p, .risk-card p, .info-card p, .step-card p, .faq-item p { margin: 0; color: var(--muted); font-size: 14px; }
.text-link { color: var(--primary); font-weight: 800; }
.product-section, .cold-wallet-section, .swap-section, .dapp-section {
    padding: 52px 0;
}
.split-block {
    display: grid;
    gap: 26px;
    align-items: center;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 30px;
    padding: 20px;
    box-shadow: var(--card-shadow);
}
.split-block.soft { background: linear-gradient(135deg, #f7fbff, #ffffff); }
.visual-panel {
    border-radius: 26px;
    overflow: hidden;
    background: linear-gradient(135deg, #edf5ff, #ffffff);
    border: 1px solid var(--line);
    min-height: 260px;
    display: grid;
    place-items: center;
    padding: 18px;
}
.visual-panel img { max-height: 390px; object-fit: contain; }
.copy-panel { padding: 4px; }
.copy-panel h2 { margin: 10px 0 12px; color: var(--deep); font-size: clamp(26px, 6vw, 42px); line-height: 1.2; letter-spacing: -0.035em; }
.copy-panel p { color: var(--muted); margin: 0 0 16px; }
.check-list { display: grid; gap: 10px; padding: 0; margin: 18px 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; color: var(--text); }
.check-list li::before { content: ""; width: 16px; height: 16px; border-radius: 50%; background: var(--primary); position: absolute; left: 0; top: 6px; box-shadow: 0 0 0 5px var(--primary-soft); }
.process-steps { display: grid; gap: 14px; }
.step-card { padding: 18px; position: relative; overflow: hidden; }
.step-num { width: 38px; height: 38px; border-radius: 14px; display: grid; place-items: center; color: #fff; background: var(--primary); font-weight: 900; margin-bottom: 12px; }
.risk-grid, .category-grid, .info-grid { display: grid; gap: 14px; }
.risk-card { padding: 18px; border-left: 4px solid var(--primary); }
.risk-card .suggest { margin-top: 10px; padding: 10px 12px; border-radius: 14px; background: var(--primary-soft); color: var(--primary-dark); font-size: 13px; font-weight: 700; }
.category-card { padding: 20px; min-height: 165px; display: flex; flex-direction: column; gap: 10px; justify-content: space-between; }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item h3 { margin: 0 0 8px; color: var(--deep); }
.cta-section { padding: 58px 0 72px; }
.cta-box {
    text-align: center;
    padding: 34px 22px;
    border-radius: 32px;
    background: linear-gradient(135deg, #ffffff 0%, #edf5ff 100%);
    border: 1px solid rgba(41,128,254,0.15);
    box-shadow: var(--card-shadow);
}
.cta-box h2 { margin: 0 0 12px; color: var(--deep); font-size: clamp(28px, 6vw, 44px); letter-spacing: -0.035em; }
.cta-box p { color: var(--muted); margin: 0 auto 22px; max-width: 680px; }
.page-title { padding: 46px 0 26px; }
.page-title h1 { font-size: clamp(32px, 8vw, 58px); }
.article-layout { display: grid; gap: 20px; align-items: start; }
.article-card { background: var(--white); border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--card-shadow); }
.article-card h2 { color: var(--deep); margin-top: 0; }
.article-card p { color: var(--muted); }
.aside-panel { background: linear-gradient(135deg, #ffffff, #f1f6ff); border: 1px solid var(--line); border-radius: 26px; padding: 20px; position: sticky; top: 92px; }
.aside-panel h3 { margin-top: 0; color: var(--deep); }
.aside-panel a { display: block; padding: 10px 0; color: var(--primary); font-weight: 700; border-top: 1px solid var(--line); }
.note-box { padding: 16px; background: var(--primary-soft); border: 1px solid rgba(41,128,254,0.15); border-radius: 20px; color: var(--primary-dark); }
.steps-list { counter-reset: item; display: grid; gap: 12px; margin: 18px 0; padding: 0; list-style: none; }
.steps-list li { counter-increment: item; padding: 14px 14px 14px 54px; border: 1px solid var(--line); border-radius: 18px; background: #fff; position: relative; color: var(--text); }
.steps-list li::before { content: counter(item); position: absolute; left: 14px; top: 13px; width: 28px; height: 28px; border-radius: 10px; display: grid; place-items: center; background: var(--primary); color: #fff; font-weight: 900; }
.download-single { margin-top: 22px; }
.site-footer { background: #ffffff; border-top: 1px solid var(--line); padding-top: 38px; }
.footer-inner { width: min(1160px, calc(100% - 32px)); margin: 0 auto; display: grid; gap: 28px; }
.footer-brand p { color: var(--muted); max-width: 470px; }
.footer-links { display: grid; gap: 20px; }
.footer-links h3 { margin: 0 0 10px; color: var(--deep); }
.footer-links a { display: block; color: var(--muted); padding: 5px 0; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { margin-top: 28px; padding: 18px 16px; text-align: center; color: var(--muted); border-top: 1px solid var(--line); font-size: 13px; }
@media (min-width: 560px) {
    .feature-shortcuts { grid-template-columns: repeat(2, 1fr); }
    .category-grid, .risk-grid, .info-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 760px) {
    .page-section { padding: 72px 0; }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .article-card { padding: 34px; }
    .footer-links { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 980px) {
    .nav-toggle { display: none; }
    .main-nav { position: static; display: flex; align-items: center; gap: 2px; padding: 0; background: transparent; border: 0; box-shadow: none; }
    .main-nav a { font-size: 14px; white-space: nowrap; }
    .hero-grid { grid-template-columns: 1.02fr .98fr; }
    .product-hero { padding: 86px 0 72px; }
    .feature-shortcuts { grid-template-columns: repeat(6, 1fr); }
    .split-block { grid-template-columns: 1fr 1fr; padding: 34px; }
    .split-block.reverse .visual-panel { order: 2; }
    .split-block.reverse .copy-panel { order: 1; }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .risk-grid { grid-template-columns: repeat(4, 1fr); }
    .category-grid { grid-template-columns: repeat(4, 1fr); }
    .article-layout { grid-template-columns: minmax(0, 1fr) 300px; }
    .footer-inner { grid-template-columns: 1fr 1.2fr; }
}