* {
    box-sizing: border-box;
}

:root {
    --primary: #2980FE;
    --primary-dark: #1468df;
    --primary-soft: #eaf3ff;
    --bg: #f6f9fe;
    --bg-soft: #f2f6fb;
    --text: #1f2937;
    --muted: #64748b;
    --line: #e5edf7;
    --white: #ffffff;
    --card-shadow: 0 16px 40px rgba(31, 91, 170, .08);
    --small-shadow: 0 8px 24px rgba(41, 128, 254, .10);
    --radius: 22px;
}

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: 1.72;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

p {
    margin: 0 0 16px;
}

ul,
ol {
    margin: 0;
    padding-left: 20px;
}

li {
    margin-bottom: 8px;
}

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(18px);
}

.nav-wrap {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.logo,
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -.02em;
    color: #172033;
}

.logo img,
.footer-logo img {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    object-fit: contain;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}

.site-nav.is-open {
    display: flex;
}

.site-nav a {
    padding: 11px 12px;
    border-radius: 12px;
    color: #334155;
    font-size: 14px;
}

.site-nav a:hover {
    color: var(--primary);
    background: var(--primary-soft);
}

.nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--white);
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: #263247;
}

.section {
    padding: 64px 0;
}

.section-soft {
    background: linear-gradient(180deg, #f5f9ff 0%, #eef5ff 100%);
}

.section-title {
    max-width: 760px;
    margin-bottom: 28px;
}

.section-title.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid rgba(41, 128, 254, .18);
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
}

h1,
h2,
h3 {
    margin: 0;
    color: #111827;
    letter-spacing: -.035em;
    line-height: 1.18;
}

h1 {
    font-size: clamp(34px, 8vw, 60px);
    margin-top: 18px;
    margin-bottom: 18px;
}

h2 {
    font-size: clamp(28px, 5vw, 42px);
    margin-top: 14px;
    margin-bottom: 14px;
}

h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.lead {
    font-size: 17px;
    color: var(--muted);
    max-width: 720px;
}

.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;
    box-shadow: 0 14px 30px rgba(41, 128, 254, .24);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 18px 36px rgba(41, 128, 254, .32);
}

.text-link {
    color: var(--primary);
    font-weight: 800;
    display: inline-flex;
    margin-top: 8px;
}

.product-hero {
    position: relative;
    overflow: hidden;
    padding: 72px 0 52px;
    background:
        radial-gradient(circle at 82% 18%, rgba(41, 128, 254, .18), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
}

.product-hero::before {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: rgba(41, 128, 254, .08);
    right: -150px;
    top: 120px;
}

.hero-grid {
    position: relative;
    display: grid;
    gap: 38px;
    align-items: center;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin: 26px 0 20px;
}

.safe-tags,
.visual-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.safe-tags span,
.visual-tags span,
.info-tag {
    padding: 7px 11px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: #475569;
    font-size: 13px;
    font-weight: 700;
}

.app-visual {
    position: relative;
    max-width: 470px;
    margin: 0 auto;
    padding: 20px;
    border-radius: 34px;
    background: linear-gradient(145deg, rgba(255,255,255,.92), rgba(234,243,255,.88));
    border: 1px solid rgba(41, 128, 254, .12);
    box-shadow: var(--card-shadow);
}

.app-visual img {
    width: min(310px, 82%);
    margin: 0 auto;
    border-radius: 26px;
    filter: drop-shadow(0 24px 36px rgba(34, 72, 125, .15));
}

.float-card {
    position: static;
    margin: 14px auto 0;
    width: min(100%, 310px);
    padding: 14px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--small-shadow);
}

.float-card strong {
    display: block;
    color: #0f172a;
}

.float-card span {
    color: var(--muted);
    font-size: 13px;
}

.visual-tags {
    justify-content: center;
    margin-top: 16px;
}

.feature-shortcuts {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.shortcut-card,
.feature-card,
.category-card,
.risk-card,
.faq-item,
.guide-card,
.tip-box,
.step-card,
.value-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 10px 28px rgba(39, 66, 112, .05);
}

.shortcut-card {
    padding: 18px;
}

.shortcut-card .icon-dot,
.category-card .icon-dot {
    width: 34px;
    height: 34px;
    display: inline-grid;
    place-items: center;
    border-radius: 12px;
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 900;
    margin-bottom: 12px;
}

.product-section,
.app-section,
.cold-wallet-section,
.swap-section,
.dapp-section {
    display: grid;
    gap: 30px;
    align-items: center;
}

.product-copy,
.panel-copy {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: var(--card-shadow);
}

.product-media {
    background: linear-gradient(145deg, #ffffff, #eef6ff);
    border: 1px solid var(--line);
    border-radius: 30px;
    padding: 22px;
    min-height: 260px;
    display: grid;
    place-items: center;
    box-shadow: var(--card-shadow);
}

.product-media img {
    max-height: 360px;
    object-fit: contain;
    border-radius: 24px;
}

.point-list {
    display: grid;
    gap: 10px;
    margin: 18px 0 6px;
    padding: 0;
    list-style: none;
}

.point-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 0;
    color: #334155;
}

.point-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    width: 19px;
    height: 19px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 900;
}

.process-steps {
    display: grid;
    gap: 14px;
}

.step-card {
    padding: 18px;
    position: relative;
}

.step-num {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-bottom: 14px;
}

.risk-grid,
.category-grid,
.card-grid,
.values-grid {
    display: grid;
    gap: 16px;
}

.risk-card {
    padding: 18px;
    border-left: 4px solid var(--primary);
}

.risk-card p,
.category-card p,
.shortcut-card p,
.step-card p,
.feature-card p,
.value-card p,
.tip-box p,
.guide-card p {
    color: var(--muted);
}

.category-card {
    padding: 20px;
}

.faq-list {
    display: grid;
    gap: 14px;
}

.faq-item {
    padding: 18px;
}

.faq-item h3 {
    font-size: 18px;
}

.cta-section {
    text-align: center;
    padding: 64px 0;
}

.cta-box {
    max-width: 850px;
    margin: 0 auto;
    padding: 32px 22px;
    border-radius: 30px;
    background:
        radial-gradient(circle at 82% 0%, rgba(41,128,254,.14), transparent 30%),
        linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
    border: 1px solid var(--line);
    box-shadow: var(--card-shadow);
}

.page-hero {
    padding: 62px 0 36px;
    background:
        radial-gradient(circle at 84% 12%, rgba(41, 128, 254, .15), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, #f3f8ff 100%);
}

.page-layout {
    display: grid;
    gap: 22px;
    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 {
    font-size: 26px;
}

.guide-card,
.tip-box,
.value-card {
    padding: 18px;
}

.tip-box {
    background: #f7fbff;
}

.checklist {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 10px;
}

.checklist li {
    padding: 12px 14px;
    border-radius: 14px;
    background: #f8fbff;
    border: 1px solid var(--line);
    margin-bottom: 0;
}

.download-panel {
    margin-top: 22px;
    padding: 22px;
    border-radius: 24px;
    background: linear-gradient(135deg, #f3f8ff, #ffffff);
    border: 1px solid var(--line);
    text-align: center;
}

.download-flow {
    counter-reset: flow;
    display: grid;
    gap: 14px;
    padding-left: 0;
    list-style: none;
}

.download-flow li {
    counter-increment: flow;
    margin: 0;
    padding: 15px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}

.download-flow li::before {
    content: counter(flow);
    display: inline-grid;
    place-items: center;
    width: 26px;
    height: 26px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    margin-right: 10px;
}

.site-footer {
    padding: 42px 0 18px;
    background: #111827;
    color: #cbd5e1;
}

.footer-grid {
    display: grid;
    gap: 24px;
}

.footer-grid p {
    max-width: 520px;
    color: #aeb9ca;
}

.footer-grid h3 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 12px;
}

.footer-grid a:not(.footer-logo) {
    display: block;
    color: #cbd5e1;
    padding: 4px 0;
    font-size: 14px;
}

.footer-logo {
    color: #fff;
    margin-bottom: 14px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    margin-top: 24px;
    padding-top: 16px;
    color: #94a3b8;
    font-size: 14px;
}

@media (min-width: 640px) {
    .feature-shortcuts {
        grid-template-columns: repeat(2, 1fr);
    }

    .risk-grid,
    .category-grid,
    .card-grid,
    .values-grid,
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .article-card,
    .product-copy,
    .panel-copy {
        padding: 30px;
    }
}

@media (min-width: 860px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        width: auto;
        padding: 0;
        background: transparent;
        border: none;
        box-shadow: none;
        gap: 2px;
    }

    .site-nav a {
        padding: 8px 10px;
    }

    .hero-grid,
    .product-section,
    .app-section,
    .cold-wallet-section,
    .swap-section,
    .dapp-section,
    .page-layout {
        grid-template-columns: 1fr 1fr;
    }

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
    }

    .feature-shortcuts {
        grid-template-columns: repeat(3, 1fr);
    }

    .float-card {
        position: absolute;
        left: 22px;
        bottom: 24px;
        margin: 0;
    }

    .visual-tags {
        position: absolute;
        right: 18px;
        top: 26px;
        width: 150px;
        justify-content: flex-start;
    }

    .cold-wallet-section .product-media,
    .dapp-section .product-media {
        order: -1;
    }

    .footer-grid {
        grid-template-columns: 1.6fr .7fr .7fr;
    }
}

@media (min-width: 1080px) {
    .section {
        padding: 82px 0;
    }

    .feature-shortcuts {
        grid-template-columns: repeat(6, 1fr);
    }

    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .risk-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .process-steps {
        grid-template-columns: repeat(3, 1fr);
    }

    .card-grid,
    .values-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}