:root {
    --primary: #2980FE;
    --primary-dark: #1765d8;
    --white: #ffffff;
    --bg: #f6f9ff;
    --soft-blue: #eef5ff;
    --soft-gray: #f4f6f8;
    --border: #e3e8f0;
    --text: #1f2937;
    --muted: #64748b;
    --deep: #0f172a;
    --shadow: 0 16px 45px rgba(41, 128, 254, .11);
    --shadow-soft: 0 10px 28px rgba(15, 23, 42, .07);
    --radius: 24px;
    --radius-lg: 30px;
}

* { 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: var(--white);
    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; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, .86);
}
.header-inner,
.content-container,
.footer-inner {
    width: min(100% - 32px, 1180px);
    margin: 0 auto;
}
.header-inner {
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: var(--deep);
    letter-spacing: .2px;
}
.logo img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: contain;
}
.site-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    padding: 12px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
}
.site-nav.open { display: grid; gap: 6px; }
.site-nav a {
    padding: 11px 12px;
    border-radius: 14px;
    color: #475569;
    font-size: 15px;
}
.site-nav a:hover,
.site-nav a.active {
    background: var(--soft-blue);
    color: var(--primary);
}
.nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 14px;
    display: grid;
    place-content: center;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--deep);
    border-radius: 99px;
}

.gradient-bg,
.portal-hero {
    background:
        radial-gradient(circle at 12% 10%, rgba(41,128,254,.18), transparent 32%),
        radial-gradient(circle at 92% 22%, rgba(41,128,254,.10), transparent 30%),
        linear-gradient(180deg, #f7fbff 0%, #ffffff 72%);
}
.portal-hero { padding: 48px 0 30px; overflow: hidden; }
.hero-grid {
    display: grid;
    gap: 34px;
    align-items: center;
}
.eyebrow,
.category-badge,
.mini-badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    border-radius: 999px;
    background: var(--soft-blue);
    color: var(--primary);
    border: 1px solid rgba(41,128,254,.18);
    font-size: 13px;
    font-weight: 700;
    padding: 6px 12px;
}
.hero-copy h1,
.page-hero h1 {
    color: var(--deep);
    line-height: 1.14;
    margin: 15px 0 16px;
    font-size: clamp(34px, 7vw, 66px);
    letter-spacing: -1.5px;
}
.hero-copy p,
.page-hero p,
.section-head p {
    color: var(--muted);
    font-size: 16px;
    margin: 0;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 24px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    border: 1px solid var(--primary);
    box-shadow: 0 12px 26px rgba(41,128,254,.25);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(41,128,254,.28);
}
.security-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}
.security-tags span {
    padding: 7px 12px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--border);
    color: #475569;
    font-size: 13px;
}
.hero-visual {
    position: relative;
    padding: 18px;
    border-radius: 34px;
    background: linear-gradient(145deg, rgba(41,128,254,.14), rgba(255,255,255,.8));
    border: 1px solid rgba(41,128,254,.14);
    box-shadow: var(--shadow);
}
.hero-phone {
    max-width: 340px;
    margin: 0 auto;
    filter: drop-shadow(0 22px 38px rgba(15,23,42,.16));
}
.float-card {
    position: relative;
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: 18px;
    background: rgba(255,255,255,.92);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
    color: #475569;
    font-size: 14px;
}
.visual-badges {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}
.visual-badges span {
    display: inline-flex;
    justify-content: center;
    padding: 10px 12px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
}

.channel-nav { padding: 20px 0 48px; }
.channel-grid,
.category-grid,
.risk-grid,
.faq-grid,
.feature-card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.channel-card,
.category-card,
.risk-card,
.faq-item,
.feature-card,
.info-card,
.tip-card,
.step-card,
.page-card,
.safety-panel {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}
.channel-card,
.category-card,
.risk-card,
.feature-card,
.info-card,
.tip-card,
.step-card,
.page-card { padding: 20px; }
.channel-card {
    min-height: 158px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.card-index {
    color: var(--primary);
    font-weight: 900;
    font-size: 13px;
}
.channel-card h3,
.category-card h3,
.risk-card h3,
.feature-card h3,
.step-card h3,
.info-card h3,
.tip-card h3,
.page-card h3 { margin: 8px 0 8px; color: var(--deep); line-height: 1.32; }
.channel-card p,
.category-card p,
.risk-card p,
.feature-card p,
.step-card p,
.info-card p,
.tip-card p,
.page-card p { margin: 0; color: var(--muted); font-size: 15px; }
.card-link {
    margin-top: 14px;
    display: inline-flex;
    color: var(--primary);
    font-weight: 800;
}

.section { padding: 60px 0; }
.section-soft { background: var(--bg); }
.section-head { margin-bottom: 24px; }
.section-head h2,
.split-copy h2,
.cta-section h2,
.download-panel h2 { color: var(--deep); margin: 0 0 10px; line-height: 1.22; font-size: clamp(28px, 5vw, 44px); }
.split-feature-section,
.wallet-split,
.cold-wallet-split,
.swap-split,
.dapp-split {
    display: grid;
    gap: 28px;
    align-items: center;
}
.split-visual,
.product-panel {
    border-radius: var(--radius-lg);
    padding: 24px;
    background: linear-gradient(145deg, #ffffff, #eef5ff);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-soft);
}
.split-visual img,
.product-panel img {
    max-height: 430px;
    margin: 0 auto;
    object-fit: contain;
}
.split-copy p { color: var(--muted); margin: 0 0 16px; }
.check-list,
.clean-list {
    list-style: none;
    padding: 0;
    margin: 18px 0 0;
    display: grid;
    gap: 10px;
}
.check-list li,
.clean-list li {
    padding: 12px 14px;
    border-radius: 16px;
    background: var(--soft-blue);
    color: #334155;
    border: 1px solid rgba(41,128,254,.13);
}
.check-list li::before,
.clean-list li::before { content: "•"; color: var(--primary); font-weight: 900; margin-right: 8px; }
.inline-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.inline-links a {
    padding: 9px 13px;
    border-radius: 999px;
    border: 1px solid rgba(41,128,254,.22);
    color: var(--primary);
    background: #fff;
    font-weight: 700;
    font-size: 14px;
}
.safety-panel {
    padding: 20px;
    border-left: 5px solid var(--primary);
    background: linear-gradient(180deg, #fff, #f7fbff);
}
.safety-panel h3 { margin-top: 0; color: var(--deep); }
.safety-panel p { color: var(--muted); }

.process-steps {
    display: grid;
    gap: 16px;
    counter-reset: steps;
}
.step-card { position: relative; overflow: hidden; }
.step-number {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    box-shadow: 0 10px 22px rgba(41,128,254,.22);
}
.risk-card {
    border-top: 4px solid var(--primary);
}
.risk-card strong { display: block; margin-top: 10px; color: var(--deep); }
.ecosystem-category { padding: 60px 0; background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%); }
.category-card { min-height: 190px; }
.category-card:nth-child(1),
.category-card:nth-child(5) { background: linear-gradient(145deg, #fff, #eef5ff); }
.faq-item { padding: 18px 20px; }
.faq-item h3 { margin: 0 0 8px; color: var(--deep); font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section {
    text-align: center;
    padding: 64px 20px;
    border-radius: 32px;
    background: radial-gradient(circle at 20% 20%, rgba(41,128,254,.14), transparent 28%), linear-gradient(145deg, #f8fbff, #eef5ff);
    border: 1px solid rgba(41,128,254,.14);
}
.cta-section p { max-width: 720px; margin: 0 auto 24px; color: var(--muted); }

.page-hero {
    padding: 48px 0 32px;
    background: linear-gradient(180deg, #f7fbff, #ffffff);
}
.page-layout {
    display: grid;
    gap: 24px;
    padding: 40px 0 64px;
}
.article-content {
    display: grid;
    gap: 18px;
}
.article-content > p {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 18px 20px;
    margin: 0;
    color: #475569;
}
.page-aside { display: grid; gap: 16px; align-content: start; }
.download-panel {
    margin-top: 8px;
    padding: 24px;
    border-radius: var(--radius);
    background: linear-gradient(145deg, #fff, #eef5ff);
    border: 1px solid rgba(41,128,254,.14);
    box-shadow: var(--shadow-soft);
}
.download-panel p { color: var(--muted); margin-top: 0; }
.download-page-grid {
    display: grid;
    gap: 22px;
    align-items: start;
}
.single-download-card {
    padding: 28px;
    border-radius: 30px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    text-align: center;
}
.download-steps {
    display: grid;
    gap: 12px;
    margin-top: 20px;
}
.download-steps div {
    padding: 14px;
    border-radius: 16px;
    background: var(--soft-blue);
    color: #334155;
}
.notice-box {
    border-left: 5px solid var(--primary);
    background: #fff;
    border-radius: 20px;
    border: 1px solid var(--border);
    padding: 18px 20px;
}
.notice-box h3 { margin-top: 0; color: var(--deep); }
.notice-box ul { margin: 0; padding-left: 20px; color: var(--muted); }
.faq-page-list { display: grid; gap: 14px; }
.faq-page-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 20px;
    box-shadow: var(--shadow-soft);
}
.faq-page-item h2 { font-size: 20px; margin: 0 0 8px; color: var(--deep); }
.faq-page-item p { margin: 0; color: var(--muted); }

.site-footer {
    background: #f8fafc;
    border-top: 1px solid var(--border);
    padding: 46px 0 20px;
}
.footer-inner {
    display: grid;
    gap: 28px;
}
.footer-brand p { color: var(--muted); max-width: 430px; }
.footer-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}
.footer-links div { display: grid; gap: 8px; }
.footer-links strong { color: var(--deep); }
.footer-links a { color: var(--muted); font-size: 14px; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom {
    width: min(100% - 32px, 1180px);
    margin: 28px auto 0;
    color: #94a3b8;
    font-size: 13px;
    border-top: 1px solid var(--border);
    padding-top: 18px;
}

@media (min-width: 640px) {
    .channel-grid,
    .category-grid,
    .risk-grid,
    .feature-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .visual-badges { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 860px) {
    .nav-toggle { display: none; }
    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 0;
        border: none;
        box-shadow: none;
        background: transparent;
    }
    .site-nav a { font-size: 14px; padding: 8px 10px; }
    .hero-grid,
    .split-feature-section,
    .wallet-split,
    .cold-wallet-split,
    .swap-split,
    .dapp-split,
    .download-page-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); }
    .cold-wallet-split .split-visual,
    .dapp-split .split-visual { order: -1; }
    .page-layout { grid-template-columns: minmax(0, 1fr) 330px; }
    .footer-inner { grid-template-columns: 1fr 1.25fr; }
    .footer-links { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
    .portal-hero { padding: 78px 0 38px; }
    .channel-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .section { padding: 82px 0; }
    .hero-copy p { max-width: 620px; font-size: 18px; }
    .float-card {
        position: absolute;
        left: -18px;
        bottom: 28px;
        margin: 0;
        width: 210px;
    }
    .visual-badges {
        position: absolute;
        right: -18px;
        top: 28px;
        width: 160px;
        grid-template-columns: 1fr;
    }
}

@media (max-width: 380px) {
    .header-inner,
    .content-container,
    .footer-inner,
    .footer-bottom { width: min(100% - 22px, 1180px); }
    .download-btn { width: 100%; }
    .hero-copy h1,
    .page-hero h1 { font-size: 32px; }
}